阅读说明：本技术 一种无机固废内燃烧结建材制品的烧结工艺 (Sintering process for inorganic solid waste internal combustion sintered building material product ) 是由 孟庆洪 张桂兰 徐小颂 孟新生 孟新利 孟江淼 于 2021-08-02 设计创作，主要内容包括：本发明公开了一种无机固废内燃烧结建材制品的烧结工艺,包括以下步骤：(1)预制无机固废内燃烧结砖坯体；(2)将所述坯体通过自动码坯机按照外密里稀的原则自动编组码入窑车；(3)窑车以0.1-0.15m/min的运行速度自动连续进入干燥窑,在100-150℃的条件下进行干燥后,得到含水率＜1％的砖坯；(4)由所述干燥窑驶出的窑车以0.1-0.15m/min的运行速度自动连续进入烧成窑进行烧制,温度由150℃升温至1080℃后保温一段时间,经过缓冷段、快冷段冷却后,出窑得到无机固废内燃烧结建材制品。本发明的烧结工艺不仅可以对无机固体废弃物进行充分的资源化利用,而且可以使得原料各种配方元素得到充分的理化反应,烧制而成的建材制品的合格率高达98％以上。(The invention discloses a sintering process for inorganic solid waste internal combustion sintered building material products, which comprises the following steps: (1) prefabricating an inorganic solid waste internal combustion sintered brick green body; (2) automatically grouping and stacking the green bodies into a kiln car by an automatic green body stacking machine according to the principle of dense outside and rare inside; (3) the kiln car automatically and continuously enters a drying kiln at the running speed of 0.1-0.15m/min, and green bricks with the water content of less than 1 percent are obtained after drying at the temperature of 100-150 ℃; (4) and (3) automatically and continuously feeding the kiln car taken out of the drying kiln into a firing kiln at the running speed of 0.1-0.15m/min for firing, raising the temperature from 150 ℃ to 1080 ℃, preserving the temperature for a period of time, cooling through a slow cooling section and a fast cooling section, and taking out of the kiln to obtain the inorganic solid waste internal combustion sintered building material product. The sintering process of the invention can not only fully utilize inorganic solid wastes as resources, but also fully react various formula elements of the raw materials, and the qualification rate of the fired building material product reaches more than 98 percent.)

1. A sintering process for inorganic solid waste internal combustion sintered building material products is characterized by comprising the following steps:

(1) prefabricating an inorganic solid waste internal combustion sintered brick green body;

(2) automatically grouping and stacking the green bodies into a kiln car by an automatic green body stacking machine according to the principle of dense outside and rare inside;

(3) the kiln car automatically and continuously enters a drying kiln at the running speed of 0.1-0.15m/min, and green bricks with the water content of less than 1 percent are obtained after drying at the temperature of 100-150 ℃;

(4) and (3) automatically and continuously feeding the kiln car taken out from the drying kiln into a firing kiln at the running speed of 0.1-0.15m/min for firing, raising the temperature from 100-plus-150 ℃ to 1050-plus-1080 ℃, preserving the temperature for a period of time, and taking the inorganic solid waste internal combustion sintered building material product out of the kiln after cooling in a slow cooling section and a fast cooling section.

2. The sintering process of inorganic solid waste internal combustion sintered building material product as claimed in claim 1, wherein the drying in step (3) is raised from normal temperature to 100-150 ℃ at a rate of 0.1-0.15 ℃/min.

3. The sintering process of inorganic solid waste internal combustion sintered building material product as claimed in claim 1, wherein the length of the drying kiln in step (3) is 106-108m, the width is 5.5-5.8m, and the height is 1.5-1.6 m.

4. The sintering process of an inorganic solid waste internal combustion sintered building material product as claimed in claim 1, wherein in step (4), the length of the kiln is 232.2-234.2m, the width is 5.5-5.8m, and the height is 1.5-1.6 m.

5. The sintering process of an inorganic solid waste internal combustion sintered building material product as claimed in claim 1, wherein the temperature rise rate in step (4) is not more than 0.5-0.7 ℃/min.

6. The sintering process of an inorganic solid waste internal combustion sintered building material product as claimed in claim 1, wherein the holding time in step (4) is 3.68-4.18 h.

7. The sintering process of inorganic solid waste internal combustion sintered building material product as claimed in claim 1, wherein the slow cooling section in step (4) is cooled from 1050-.

8. The sintering process of an inorganic solid waste internal combustion sintered building material product as claimed in claim 1, wherein the rapid cooling stage in step (4) is cooling from 920 ℃ to 30-50 ℃ at a rate of 1.8-2 ℃/min.

9. The sintering process of an inorganic solid waste internal combustion sintered building material product as claimed in claim 1, wherein the atmosphere of the firing kiln in the step (4) is a strong oxidizing atmosphere, so that the kiln pressure is-3.5 to 1 MPa.

10. The sintering process of an inorganic solid waste internal combustion sintered building material product as claimed in claim 9, wherein the degree of oxidation is controlled by one or more of adjusting ventilation gates on both sides of the kiln, uncovering a fire cover on the top of the kiln, opening a kiln door, or increasing the power of a fan.

Technical Field

The invention relates to the technical field of kiln equipment for sintering building material products, in particular to a sintering process for internal combustion sintering building material products by taking inorganic solid wastes as raw materials.

Background

The sintered building material belongs to the paradigm of porcelain washing products, the ceramic history of China is long, the kiln plays a decisive role, and the kiln has the same development history: the kiln is developed from underground to ground, from a flame type steamed bun kiln, a dragon kiln to a stepped kiln to an egg-shaped kiln, also called Jingdezhen kiln and the like, and the kiln is still created by ancient people in the recent historical long river.

After a new Chinese is established, the kiln in China achieves rapid development, tunnel kilns are invented in sixties, shuttle kiln test kilns are developed in seventies, roller kilns are developed in nineties, and the roller kilns are developed from external combustion to internal combustion, so that the quality of traditional raw material products is greatly improved, and the energy utilization rate is greatly improved. Although the development of the novel fuel reaches a leap development after the new China is established, the development of the kiln does not play a qualitative role in comparison with the burning products and raw materials.

Along with the development of science and technology, the exploitation of mineral resources generates huge amount of slag and industrial waste residue, which seriously damages ecology, and because the exploitation of mineral resources can not be completely forbidden from the source, the resource utilization of solid wastes becomes a world problem which is present to human beings, people have been researched and explored in the past more than twenty years, but the problem of resource utilization, especially the industrial solid wastes, can not be fundamentally solved, the fundamental reasons include that the treatment technology is not available, the cost is high, no market exists, and the resource utilization can not be realized,

the applicant has invented the sintered building materials using industrial solid wastes as raw materials for solving the problem of resource utilization of industrial solid wastes, and has already passed through industrial production, but the traditional internal combustion tunnel kiln is not suitable for the sintered building materials products made of the special raw materials, and the current internal combustion tunnel kiln is only suitable for loess internal combustion sintered bricks, shale internal combustion sintered bricks, building waste internal combustion sintered bricks and the like, and is not suitable for the firing of the internal combustion sintered building materials products using industrial solid wastes as raw materials, such as: red mud internal combustion baked brick, waste gypsum internal combustion baked brick, sludge internal combustion baked brick and the like.

Therefore, the problem to be solved by those skilled in the art is how to provide a sintering process for inorganic solid waste internal combustion sintered building material products.

Disclosure of Invention

In view of the above, the present invention provides a sintering process for inorganic solid waste internal combustion sintering building material products through the improvement of the tunnel kiln structure and the improvement of the firing process, which is qualitatively different from the operation method of the production process of the traditional common internal combustion sintering kiln equipment with the same yield.

In order to achieve the purpose, the invention adopts the following technical scheme:

a sintering process for inorganic solid waste internal combustion sintered building material products comprises the following steps:

(1) prefabricating an inorganic solid waste internal combustion sintered brick green body;

(2) automatically grouping and stacking the green bodies into a kiln car by an automatic green body stacking machine according to the principle of dense outside and rare inside;

(3) the kiln car automatically and continuously enters a drying kiln at the running speed of 0.1-0.15m/min, and green bricks with the water content of less than 1 percent are obtained after drying at the temperature of 100-150 ℃;

(4) and (3) automatically and continuously feeding the kiln car taken out from the drying kiln into a firing kiln at the running speed of 0.1-0.15m/min for firing, raising the temperature from 150 ℃ to 1050-1080 ℃, preserving the temperature for a period of time, and taking the kiln car out of the kiln after cooling in a slow cooling section and a fast cooling section to obtain the inorganic solid waste internal combustion sintered building material product.

The kiln entering speed of the kiln car is determined by the yield, the firing temperature and the length of the kiln at the firing section, the sintering temperature and the heating speed of the product are invariable, but the length of the kiln at the firing section is variable, the length of the kiln at the firing section is short, the kiln car enters the kiln at a slow operation speed and has a small yield, the kiln car enters the kiln at a long length, the kiln car enters the kiln at a fast operation speed and has a large yield, so the unit yield and the heating speed determine the length of the kiln, and the special kiln can meet the production requirements of the quantity and the quality of internal combustion sintered building material products taking specific inorganic solid wastes as raw materials.

Preferably, in the sintering process of the inorganic solid waste internal combustion sintered building material product, in the step (3), the drying is carried out at a speed of 0.1-0.15 ℃/min from normal temperature to 100-150 ℃, and the drying process is carried out for a long time, so that the green body is fully subjected to physicochemical reaction in a low-temperature drying stage.

Preferably, in the sintering process of the inorganic solid waste internal combustion sintered building material product, the pressure of the drying kiln in the step (3) is weak negative pressure, so that the green body is dried from inside to outside.

Preferably, in the above sintering process for sintering building material products by internal combustion of inorganic solid wastes, the drying kiln in step (3) has a length of 106-108m, a width of 5.5-5.8m and a height of 1.5-1.6 m.

Preferably, in the above sintering process for sintering building material products by internal combustion of inorganic solid wastes, the length of the firing kiln in the step (4) is 232.2-234.2m, the width is 5.5-5.8m, and the height is 1.5-1.6 m.

Preferably, in the sintering process of the inorganic solid waste internal combustion sintered building material product, the temperature rise rate in the step (4) is not more than 0.5-0.7 ℃/min.

Preferably, in the sintering process of the inorganic solid waste internal combustion sintered building material product, the heat preservation time in the step (4) is 3.68-4.18 h.

Preferably, in the sintering process of the inorganic solid waste internal combustion sintered building material product, the slow cooling section in the step (4) is cooled from 1050-1080 ℃ to 900-920 ℃ at a rate of 1.45-1.65 ℃/min.

Preferably, in the sintering process of the inorganic solid waste internal combustion sintered building material product, the rapid cooling section in the step (4) is cooled from 920 ℃ to 30-50 ℃ at the speed of 1.8-2 ℃/min.

Preferably, in the sintering process for sintering the building material product by internal combustion of inorganic solid waste, the atmosphere of the firing kiln in the step (4) is a strong oxidizing atmosphere, so that the kiln pressure is-3.5 to 1 MPa.

The firing atmosphere of the invention is strong oxidizing atmosphere, and the heat preservation is needed for a certain time, so that the internal combustion carbon can be fully combusted, various chemical components in the blank body can achieve sufficient physicochemical reaction, unfavorable chemical components in solid wastes can be converted into favorable components, and the sintered building material product can be ensured to meet or even exceed the requirements of national standards.

Preferably, in the sintering process of the inorganic solid waste internal combustion sintered building material product, the oxidation degree is controlled by one or more of adjusting ventilation gates on two sides of the kiln, uncovering a fire cover on the top of the kiln, opening a kiln door or increasing the power of a fan.

Compared with the traditional tunnel kiln equipment, (1) the sintering kiln is provided with a heat preservation section, and the length of the traditional internal combustion sintering tunnel kiln with the same yield is increased by 1.19-1.21 times, the width is increased by 14.6-20.8%, and the height is reduced by 13-18.5%; (2) the traditional internal combustion sintering building material sintering process of the tunnel kiln requires rare-stacking, big-fire, fast-burning, no heat preservation and weak oxidation, and the temperature rise speed of the sintering section is more than 1.5 ℃/min, while the internal combustion sintering building material sintering process taking inorganic solid waste as the raw material requires rare-stacking, small-fire, slow-burning, strong-oxidation, heat preservation and the temperature rise speed of the sintering section cannot exceed 0.7 ℃/min; (2) the temperature difference between the upper part, the middle part, the lower part, the left part and the right part of the furnace in any cross section of the sintering section of the traditional furnace is more than 80 ℃, and the temperature difference of any cross section of the invention is less than 20 ℃.

Compared with the prior art, the invention discloses a sintering process for inorganic solid waste internal combustion sintered building material products, which has the following advantages: the sintering process of the invention can not only fully utilize inorganic solid wastes as resources, but also fully react various formula elements of the raw materials, and the qualification rate of the fired building material product reaches more than 98 percent and reaches or even exceeds the national standard.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A sintering process for inorganic solid waste internal combustion sintered building material products comprises the following steps:

(1) prefabricating an inorganic solid waste internal combustion sintered brick green body;

(2) automatically grouping and stacking the green bodies into a kiln car by an automatic green body stacking machine according to the principle of dense outside and thin inside;

(3) the kiln car automatically and continuously enters a drying kiln at the running speed of 0.1-0.15m/min, and green bricks with the water content of less than 1 percent are obtained after drying at the temperature of 100-150 ℃;

(4) and (3) automatically and continuously feeding the kiln car taken out from the drying kiln into a firing kiln at the running speed of 0.1-0.15m/min for firing, raising the temperature from 100-150 ℃ to 1050-1080 ℃, preserving the temperature for a period of time, and taking the inorganic solid waste internal combustion sintered building material product out of the kiln after cooling in a slow cooling section and a fast cooling section.

In order to further optimize the technical scheme, the drying in the step (3) is increased from normal temperature to 100-150 ℃ at the speed of 0.1-0.15 ℃/min.

In order to further optimize the technical scheme, the length of the drying kiln in the step (3) is 106-108m, the width of the drying kiln is 5.5-5.8m, and the height of the drying kiln is 1.5-1.6 m.

In order to further optimize the technical scheme, the length of the firing kiln in the step (4) is 232.2-234.2m, the width is 5.5-5.8m, and the height is 1.5-1.6 m.

In order to further optimize the technical scheme, the temperature rise rate in the step (4) is not more than 0.5-0.7 ℃/min.

In order to further optimize the technical scheme, the heat preservation time in the step (4) is 3.68-4.18 h.

In order to further optimize the above technical scheme, the slow cooling section in step (4) is cooled from 1050-.

In order to further optimize the technical scheme, the quick cooling section in the step (4) is cooled from 920 ℃ to 30-50 ℃ at the speed of 1.8-2 ℃/min.

In order to further optimize the technical scheme, the atmosphere of the firing kiln in the step (4) is strong oxidizing atmosphere, so that the kiln pressure is-3.5 to 1 MPa.

In order to further optimize the technical scheme, the oxidation degree is controlled by one or more of adjusting ventilation gates on two sides of the kiln, uncovering a fire cover on the top of the kiln, opening a kiln door or increasing the power of a fan.

Comparative example 1

The inorganic solid waste common internal combustion sintered building material product is produced by utilizing the traditional loess, shale, common internal combustion sintered brick tunnel kiln, a specific production process, a method and unit yield, namely the traditional equipment is unchanged, and the traditional process and the method are changed.

The conventional loess and shale common internal combustion sintered brick complete set production equipment is utilized to produce the inorganic solid waste formula raw material common sintered brick, the equipment is not changed at all, but the drying and sintering process and method must be changed, the unit yield is reduced to meet the national standard requirements of the inorganic solid waste formula raw material common internal combustion sintered brick products,

the implementation process comprises the following steps:

(1) determining the raw materials of the internal combustion sintered product: the raw material is inorganic solid waste red mud, the red mud is waste residue discharged by alumina industry, the highest discharge of 1.2-3.2 tons of strong alkaline waste residue is discharged when one ton of alumina is produced, the red mud is called because the ferric oxide and the water content are higher,

(2) determining the internal combustion sintered building material product of the red mud: the product is determined to be an internal combustion red mud common sintered brick, the red mud raw material prepared by the applicant can be used for producing various internal combustion and external combustion sintered building material products, and the comparative example takes the red mud internal combustion common sintered brick as an example for explanation;

(3) determining the production equipment and the production process method of the red mud internal combustion brick: the equipment is determined to be complete equipment for producing thirty-one thousand traditional loess and shale common internal combustion sintered bricks in daily life, and the production process is the same as the traditional process except that the red mud green body is dried and sintered into a specific production process;

the specific implementation process flow operation is as follows:

s1, taking 950 tons of red mud with the water content of less than 5 percent, adding 50 tons of prepared addition raw materials (the grain diameter is less than 60 meshes, quartz powder, bentonite, barium chloride, 60:35:5) and 320 tons of coal gangue (the heat value is one thousand kilocalories, the grain diameter is less than 3mm), and respectively storing the raw materials into respective bins for later use;

s2, mixing the spare red mud, the additive raw materials, the coal gangue and the water according to the weight ratio of 30: 1.6: 1: 0.15, respectively and automatically conveying the mixture into a stirrer through a belt scale and a water flow meter for fully stirring, wherein the heat value of the uniformly stirred mixed raw materials is three hundred twenty kilocalories, so as to obtain a formula blank with the water content of 5%, and automatically conveying the formula blank into an aging warehouse for aging for 72 hours for later use;

s3, mixing the aged blank and water according to the weight ratio of 10: the weight ratio of 1 is automatically fed into a secondary stirrer for secondary stirring through a belt scale and a water flow meter;

s4, automatically feeding the blanks with the water content of 15% after secondary stirring into a vacuum extruder for vacuum pugging, and then extruding through an extrusion port of 240 x 115mm to obtain continuous blank strips of 240 x 115 mm;

s5, automatically conveying the billet into a cutting machine, automatically cutting sixteen blocks (twelve blocks to eighteen blocks are adjustable) at intervals of 53mm, and then automatically pushing the cut blocks into a setting platform to obtain red mud internal combustion sintered brick blanks of 240 mm multiplied by 115mm multiplied by 53 mm;

s6, automatically grouping and stacking the green bodies on the green body stacking platform into a kiln car of 4.8m multiplied by 4.8m according to a set program and the principle of dense outside and sparse inside by an automatic green body stacking machine, wherein the distance between each layer of green bodies (according to the longitudinal direction) is 2.5cm in eight stacks at two sides, 3.5cm in the middle and 20cm in distance between stacks, and the kiln car for stacking 12288 red mud internal combustion sintered green bricks by each car according to a set distance is continuously obtained;

s7, allowing the kiln car fully loaded with the red mud adobes to enter a drying kiln with the use specification of 106 meters long, 4.8 meters wide and 1.84 meters high at the running speed of 0.04 m/min for drying, wherein the drying temperature is from normal temperature to 120 ℃, and the kiln pressure is negative pressure, so that qualified red mud adobes with the water content of below 1% are obtained;

s8, continuously fully loading and drying qualified red mud adobe kiln cars continuously, entering a firing tunnel kiln furnace using strong oxidizing atmosphere with the specification of 106 meters long, 4.8 meters wide and 1.84 meters high at the running speed of 0.04 m/min for sintering, running for 1714 minutes at the heating speed of 0.56 ℃ per minute from 120 ℃ to 1080 ℃, keeping the temperature for 320 minutes, entering a slow cooling section, running for 221 minutes to 760 ℃ at the speed of 1.45 ℃ per minute, entering a fast cooling section, running for 395 minutes to 50 ℃ at the cooling speed of 1.8 ℃ per minute, and continuously discharging from the kiln, wherein the firing running period is 44.2 hours, and continuously obtaining 14.75 million red mud internal combustion common sintered brick products produced per day.

The red mud internal combustion common sintered brick process flow is characterized in that 30 ten thousand blocks of loess shale common internal sintered brick equipment produced per day is used for producing the red mud internal combustion common sintered brick according to the specific drying and firing process of the red mud internal combustion common sintered brick, the traditional equipment is not changed, the drying and firing process is changed, the original rare yard, strong fire, fast firing and high yield are changed into the rare yard, the small fire, slow firing and low yield, the operation speed is changed from the traditional 0.87m per minute to 0.04m per minute, the time interval of vehicle entering is changed from the traditional 0.92 hour to 1.98 hours, the blank temperature rise speed is changed from the traditional 1.51 ℃ per minute to 0.7 ℃ per minute, the daily yield is changed from the traditional 31.9 ten thousand blocks to 14.1 ten thousand blocks, but the temperature difference between the upper layer height of the traditional kiln and the lower layer is more than 80 ℃, so the sintering temperature of the red mud internal combustion common sintered brick at the upper 12 layers is 1080 ℃, the strength is the MU30 comprehensive standard quality is high-quality product, and the sintering temperature at the lower 4 layers is 1000 ℃, the product strength is MU10, and the product quality is qualified.

The firing heat energy is derived from red mud internal combustion green bricks with the mixed heat value of 320 kilocalories; the temperature rise speed, temperature and oxidation atmosphere are adjusted by the air flow of a fan, namely the oxygen supply amount, and the operation method comprises the following steps: the method for adjusting the opening sizes of the ventilation gates, the kiln top fire covers and the kiln doors on the two sides of the kiln and the power of the fan ensures that the internal combustion raw materials of the red mud green bricks are fully combusted, the color is as uniform as the surface and the interior, and no black core exists, thus obtaining the red mud sintered brick products which exceed and reach the national standard.

Example 1

The special kiln for inorganic solid wastes and the special process are utilized to produce inorganic solid waste common internal combustion sintered building material products with unit yield. The unit yield of the traditional common loess and shale internal combustion sintered brick is not changed, and the improved inorganic solid waste internal combustion common sintered building material kiln and the specific production process are utilized to produce the solid waste internal combustion sintered product.

The implementation process comprises the following steps:

(1) determining the unit yield: comparative example 1 the unit yield of a conventional loess and shale common internal combustion baked brick is thirty thousand blocks produced per day, and example 1 also determines that the unit yield is thirty thousand blocks produced per day and the yield is unchanged;

(2) determining inorganic solid waste raw materials of internal combustion sintered products: the raw material is determined to be inorganic solid waste red mud, the red mud is waste residue discharged by alumina industry, 1.2-3.2 tons of strong alkaline waste residue are discharged when one ton of alumina is produced, and the red mud is called because of containing ferric oxide and high moisture;

(3) determining the red mud internal combustion sintered product: according to the chemical components, physical and chemical properties, formula raw material cost, production process, method and quality standard requirements of the red mud, the red mud raw material prepared by the applicant can be used for producing various internal combustion and external combustion sintered building material products, which are determined to be red mud internal combustion common winding brick products in the embodiment;

(4) the production equipment and the production process of the red mud internal combustion common baked brick are determined as follows:

s1, taking 950 tons of red mud with the water content of less than 5 percent, adding 50 tons of prepared addition raw materials (the grain diameter is less than 60 meshes, quartz powder, bentonite, barium chloride, 60:35:5) and 320 tons of coal gangue (the heat value is one thousand kilocalories, the grain diameter is less than 3mm), and respectively storing the raw materials into respective bins for later use;

s2, mixing the spare red mud, the additive raw materials, the coal gangue and the water according to the weight ratio of 30: 1.6: 1: 0.15, respectively and automatically conveying the mixture into a stirrer through a belt scale and a water flow meter for fully stirring, wherein the heat value of the uniformly stirred mixed raw materials is three hundred twenty kilocalories, so as to obtain a formula blank with the water content of 5%, and automatically conveying the formula blank into an aging warehouse for aging for 72 hours for later use;

s3, mixing the aged blank and water according to the weight ratio of 10: the weight ratio of 1 is automatically fed into a secondary stirrer for secondary stirring through a belt scale and a water flow meter;

s4, automatically feeding the blanks with the water content of 15% after secondary stirring into a vacuum extruder for vacuum pugging, and then extruding through an extrusion port of 240 x 115mm to obtain continuous blank strips of 240 x 115 mm;

s5, automatically conveying the billet into a cutting machine, automatically cutting sixteen blocks (twelve blocks to eighteen blocks are adjustable) at intervals of 53mm, and then automatically pushing the cut blocks into a setting platform to obtain red mud internal combustion sintered brick blanks of 240 mm multiplied by 115mm multiplied by 53 mm;

s6, automatically assembling and stacking green bodies on a green body stacking platform into a kiln car of 5.5X5.5m according to a set program according to the principle of dense outside and rare inside, wherein one kiln car is twelve layers and thirty-six stacks, the distance between each layer of green bodies and the green bodies (longitudinally) is 2.5cm between the twelve stacks on two sides, the distance between the twenty-four stacks in the middle is 3.5cm, the distance between the stacks and the stacks is twenty cm, and the kiln car for stacking 11664 red mud internal combustion sintered green bricks on each car at the fixed distance is continuously obtained;

s7, drying: the kiln car fully loaded with adobes automatically and continuously enters a drying kiln at the speed of 0.1m per minute, and the drying kiln structure is as follows: the length is 106m, the width is 5.5m, the height is 1.5m (using space), the parking space is 19 parking spaces, the drying speed is 0.12 ℃ per minute, the drying temperature is from the normal temperature to 150 ℃, the operation period is 17.7 hours, the drying heat energy is from the residual heat of a firing kiln,

the drying method comprises the following steps: adjusting a drying temperature heating curve by a hot air adjusting valve according to the requirement of a drying curve set by a drying instrument, controlling the implementation and drying operation period to be 22.4 hours, continuously and automatically taking out of a drying kiln at intervals after drying at normal temperature to 150 ℃ and entering a workshop to obtain qualified green bricks with pure dry finished product moisture content of below 1%, and entering a firing kiln;

in the present embodiment, except that the height of the drying kiln is changed from 1.84m to 1.5m and the stacking height is changed from 16 layers to 12 layers, other devices and processes are the same as those of the conventional devices, and the essential difference is the firing kiln device, process and method;

s8, firing process and method: the kiln car full of the adobes automatically enters the use specification continuously at the running speed of 0.1m per minute: firing by using a special tunnel kiln for the red mud with the length of 232.2m, the width of 5.5m and the height of 1.5m for sintering the building materials;

after the red mud enters a firing kiln, the temperature of a green brick is raised to 1080 ℃ from 150 ℃ at the heating rate of 0.6 ℃ per minute, the temperature is preserved for 3.68 hours, the green brick enters a slow cooling section, is cooled to 920 ℃ from 1080 ℃ at the speed of 1.45 ℃ per minute, the green brick is used for 1.84 hours, then enters a fast cooling section, is cooled to 50 ℃ from 920 ℃ at the cooling rate of 1.8 ℃ per minute, the green brick is used for 8.1 hours, the firing operation cycle of the product is 39.42 hours, and the green brick is continuously discharged from the kiln to obtain 30 million red mud internal combustion common fired brick products produced per day.

The firing heat energy is from a red mud internal combustion green brick with the mixed heat value of 320 kilocalories; the temperature rise speed, temperature and oxidation atmosphere are adjusted by the air flow of a fan, namely the oxygen supply amount, and the operation method comprises the following steps: the method for adjusting the opening sizes of the ventilation gates, the kiln top fire covers and the kiln doors on the two sides of the kiln and the power of the fan ensures that the internal combustion raw materials of the red mud adobes are fully combusted, and the red mud adobes have the same color as the inside and the outside and have no black core.

The average value of the compressive strength of the red mud internal combustion common sintered brick product prepared by the invention is 10.9MPa, and the water absorption rate is 10.2 percent, which all reach or even exceed the national standard.

The sintering process of the inorganic solid waste internal combustion sintered building material product is described in detail above, and comparative example 1 is a production process and a production method for realizing the inorganic solid waste (red mud) internal combustion sintered brick product by using traditional common sintered brick equipment produced in 30 thousands of days, but the yield is reduced by 53 percent due to the limitation of the equipment, 30 thousands of the daily products are reduced to 14.1 thousands of the daily products, and the requirement of completely and completely utilizing the inorganic solid waste resource cannot be realized from quality to quantity.

The invention discloses a method for producing a building material product by using a sintering (brick) kiln, which is characterized in that a large amount of inorganic solid waste is discharged to restrict the rapid development of the industry, loess and shale are exploited to restrict the production of sintered (brick) building materials, and the continuous development of the building industry is influenced.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the scheme disclosed by the embodiment, the scheme corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.