阅读说明：本技术 一种水泥生产工艺 (Cement production process ) 是由 张大治 于 2021-09-16 设计创作，主要内容包括：本发明涉及水泥领域,更具体的说是一种水泥生产工艺。本发明可以使用废旧原料制备水泥。一种水泥生产工艺,包括以下步骤：(A)按重量取带有氧化钙、二氧化硅、氧化铝和氧化铁废旧原料进行预破碎,然后将废旧原料放置在原料磨中进行粉磨形成混合料；(B)将混合料放入原料仓内,向原料仓内通入空气,使得原料仓内升压后并进行搅拌,形成调和生料；(C)将调和生料加入悬浮式预热器中预热,预热后将调和生料通入回转窑中加热后形成熟料；(D)将熟料通入冷却机中冷却；(E)将冷却后的熟料加入破碎机中预破碎,在破碎后的熟料内加入石膏,将石膏和预破碎后的熟料同时加入粉磨设备磨成粉状,并搅拌后形成水泥。(The invention relates to the field of cement, in particular to a cement production process. The invention can use waste raw materials to prepare cement. A cement production process comprises the following steps: (A) taking waste raw materials with calcium oxide, silicon dioxide, aluminum oxide and ferric oxide according to weight, pre-crushing, and then placing the waste raw materials in a raw material mill for grinding to form a mixture; (B) placing the mixture into a raw material bin, introducing air into the raw material bin, boosting the pressure in the raw material bin, and stirring to form a blended raw material; (C) adding the mixed raw material into a suspension preheater for preheating, introducing the mixed raw material into a rotary kiln for heating after preheating, and forming clinker; (D) introducing the clinker into a cooling machine for cooling; (E) adding the cooled clinker into a crusher for pre-crushing, adding gypsum into the crushed clinker, adding the gypsum and the pre-crushed clinker into a grinding device simultaneously, grinding into powder, and stirring to form the cement.)

1. A cement production process is characterized in that: the method comprises the following steps:

(A) taking waste raw materials with calcium oxide, silicon dioxide, aluminum oxide and ferric oxide according to weight, putting the waste raw materials into a raw material crushing device for pre-crushing, and then putting the waste raw materials into a raw material mill for grinding to form a mixture;

(B) placing the mixture into a raw material bin, introducing air into the raw material bin, boosting the pressure in the raw material bin, and stirring to form a blended raw material;

(C) adding the mixed raw material into a suspension preheater for preheating, introducing the mixed raw material into a rotary kiln for heating after preheating, and forming clinker;

(D) introducing the clinker into a cooling machine for cooling;

(E) adding the cooled clinker into a crusher for pre-crushing, adding gypsum into the crushed clinker, adding the gypsum and the pre-crushed clinker into a grinding device simultaneously, grinding into powder, and stirring to form the cement.

2. A cement manufacturing process according to claim 1, characterized in that: in the step (A), the waste raw materials comprise 10-13 parts of fly ash, 6-10 parts of construction residual soil, 9-17 parts of sewage sludge incineration ash and 7-19 parts of glass slag.

3. A cement manufacturing process according to claim 1, characterized in that: and (B) raising the pressure in the raw material bin to 80-100kpa and stirring.

4. A cement manufacturing process according to claim 1, characterized in that: in the step (C), the blended raw meal is added into a suspension preheater to be preheated to 100-300 ℃.

5. A cement manufacturing process according to claim 1, characterized in that: and (C) introducing the blended raw material into a rotary kiln to heat to 1450 ℃ to form clinker.

6. A cement manufacturing process according to claim 1, characterized in that: and (D) introducing the clinker into a cooler to be cooled to 80-100 ℃.

7. A cement manufacturing process according to claim 1, characterized in that: in the step (E), 20-30 parts by weight of gypsum is added into the crushed clinker.

8. A cement manufacturing process according to claim 1, characterized in that: and (C) heating the rotary kiln by using one or more of waste plastics, automobile broken residues, waste tires, waste oil and wood chips.

9. A cement manufacturing process according to claim 2, characterized in that: the fly ash, the construction residual soil, the sewage sludge incineration ash and the glass slag are pre-crushed by a raw material crushing device.

10. A cement manufacturing process according to claim 9, characterized in that: the raw material crushing device comprises a rear plate (101), a bending part (102), sieve plates (104), sliding columns (105), vertical columns (106), beam rods (107), arc-shaped pressing plates (108) and telescopic rods I (110), wherein the front side of the rear plate (101) is provided with a plurality of sieve plates (104) which are parallel to each other from top to bottom, sieve holes of the sieve plates (104) are sequentially reduced from top to bottom, the left parts of the sieve plates (104) are respectively provided with the bending part (102), the right part of the rear plate (101) is fixedly connected with the beam rods (107), the left side of each vertical column (106) is provided with a plurality of sliding columns (105) which are parallel to each other from top to bottom, one sliding column (105) is transversely connected to the beam rods (107) in a sliding manner, the telescopic rods I (110) are fixedly connected to the beam rods (107), the movable ends of the telescopic rods I (110) are fixedly connected to the vertical columns (106), the left sides of the sliding columns (105) are respectively provided with the arc-shaped pressing plates (108), the plurality of arc-shaped pressure plates (108) are respectively positioned on the right side of the plurality of sieve plates (104).

Technical Field

The invention relates to the field of cement, in particular to a cement production process.

Background

The cement is a powdery hydraulic inorganic cementing material. Water is added and stirred to form slurry which can be hardened in air or water and can firmly bond sand, stone and other materials together. The early lime and pozzolan mixtures are similar to modern lime and pozzolan cements, and concrete made by cementing crushed stone with them not only has higher strength after hardening, but also resists erosion by fresh water or salt-containing water. As an important cementing material, the high-performance cement is widely applied to engineering such as civil construction, water conservancy, national defense and the like for a long time.

However, the traditional cement production process does not use waste raw materials to prepare cement.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a cement production process, which has the beneficial effect that the cement can be prepared by using waste raw materials.

A cement production process comprises the following steps:

(A) taking waste raw materials with calcium oxide, silicon dioxide, aluminum oxide and ferric oxide according to weight, pre-crushing, and then placing the waste raw materials in a raw material mill for grinding to form a mixture;

(B) placing the mixture into a raw material bin, introducing air into the raw material bin, boosting the pressure in the raw material bin, and stirring to form a blended raw material;

(C) adding the mixed raw material into a suspension preheater for preheating, introducing the mixed raw material into a rotary kiln for heating after preheating, and forming clinker;

(D) introducing the clinker into a cooling machine for cooling;

(E) adding the cooled clinker into a crusher for pre-crushing, adding gypsum into the crushed clinker, adding the gypsum and the pre-crushed clinker into a grinding device simultaneously, grinding into powder, and stirring to form the cement.

Preferably, the waste raw materials in the step (A) comprise 10-13 parts of fly ash, 6-10 parts of construction residual soil, 9-17 parts of sewage sludge incineration ash and 7-19 parts of glass slag;

preferably, in the step (B), the pressure in the raw material bin is increased to 80-100kpa, and stirring is performed.

Preferably, the blending raw meal is added into a suspension preheater to be preheated to 100-300 ℃ in the step (C).

Preferably, in the step (C), the blended raw meal is introduced into a rotary kiln and heated to 1450 ℃ to form clinker.

Preferably, the clinker in the step (D) is introduced into a cooler to be cooled to 80-100 ℃.

Preferably, 20-30 parts by weight of gypsum is added to the crushed clinker in the step (E).

Preferably, the fuel for heating the rotary kiln in the step (C) is one or more of waste plastics, automobile broken residues, waste tires, waste oil and wood chips.

Preferably, the fly ash, construction residual soil, sewage sludge incineration ash and glass slag are pre-crushed by a raw material crushing device.

Drawings

The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a flowchart of example 1;

FIG. 2 is a flowchart of example 2;

FIG. 3 is a flowchart of example 3;

FIG. 4 is a flow chart of comparative example 1;

FIG. 5 is a flow chart of comparative example 2;

FIG. 6 is a first schematic structural diagram of a raw material crushing device;

FIG. 7 is a schematic structural diagram II of a raw material crushing device;

FIG. 8 is a schematic view of the structure of the back plate

FIG. 9 is a second schematic structural view of the back plate;

FIG. 10 is a first schematic structural view of a crushing box;

FIG. 11 is a second schematic structural view of the crush box;

fig. 12 is a schematic structural view of the chassis.

In the figure: a rear plate 101; a curved portion 102; a rib I103; a screen deck 104; a spool 105; the upstands 106; a beam 107; an arcuate platen 108; a rib II 109; a telescopic rod I110; a riser 111; a crushing box 201; a gantry 202; a crushing roller 203; a square column 204; a V-shaped plate 205; side blocking edges 206; a front plate 207; a chassis 301; a rotating frame 302; a circumferential rotating rod 303; a slide hole 304; a slide pin 305; the telescopic rod II 306.

Detailed Description

A cement production process comprises the following steps:

(A) taking waste raw materials with calcium oxide, silicon dioxide, aluminum oxide and ferric oxide according to weight, putting the waste raw materials into a raw material crushing device for pre-crushing, and then putting the waste raw materials into a raw material mill for grinding to form a mixture;

the use of various waste raw materials can be effectively saved, the effect of recycling waste is achieved, and the waste is treated and the use of the ore is saved. And the used raw material crushing device can effectively pre-crush the waste raw materials.

(B) Placing the mixture into a raw material bin, introducing air into the raw material bin, boosting the pressure in the raw material bin, and stirring to form a blended raw material;

(C) adding the mixed raw material into a suspension preheater for preheating, introducing the mixed raw material into a rotary kiln for heating after preheating, and forming clinker;

(D) introducing the clinker into a cooling machine for cooling;

(E) adding the cooled clinker into a crusher for pre-crushing, adding gypsum into the crushed clinker, adding the gypsum and the pre-crushed clinker into a grinding device simultaneously, grinding into powder, and stirring to form the cement.

Example 1:

(A) taking 11 parts of fly ash, 8 parts of construction residual soil, 12 parts of sewage sludge incineration ash and 14 parts of glass slag by weight, putting the materials into a raw material crushing device for pre-crushing, and then putting the waste raw materials into a raw material mill for grinding to form a mixture;

(B) placing the mixture into a raw material bin, introducing air into the raw material bin, and raising the pressure in the raw material bin to 100kpa for stirring to form a blended raw material;

(C) adding the mixed raw material into a suspension preheater to preheat to 200 ℃, introducing the mixed raw material into a rotary kiln to heat to 1450 ℃ after preheating to form clinker;

(D) introducing the clinker into a cooling machine to be cooled to 100 ℃;

(E) adding the cooled clinker into a crusher for pre-crushing, adding 25 parts by weight of gypsum into the crushed clinker, adding the gypsum and the pre-crushed clinker into a grinding device simultaneously, grinding into powder, and stirring to form the cement.

Example 2:

(A) 13 parts of fly ash, 9 parts of construction residual soil, 16 parts of sewage sludge incineration ash and 15 parts of glass slag are taken by weight and put into a raw material crushing device for pre-crushing, and then the waste raw material is put into a raw material mill for grinding to form a mixture;

(B) putting the mixture into a raw material bin, introducing air into the raw material bin, and raising the pressure in the raw material bin to 80-100kpa for stirring to form a blended raw material;

(C) adding the mixed raw material into a suspension preheater to preheat to 250 ℃, introducing the mixed raw material into a rotary kiln to heat to 1450 ℃ after preheating to form clinker;

(D) introducing the clinker into a cooling machine to be cooled to 100 ℃;

(E) adding the cooled clinker into a crusher for pre-crushing, adding 20-30 parts by weight of gypsum into the crushed clinker, adding the gypsum and the pre-crushed clinker into a grinding device at the same time, grinding into powder, and stirring to form the cement.

Example 3:

(A) taking 12 parts of fly ash, 10 parts of construction residual soil, 17 parts of sewage sludge incineration ash and 19 parts of glass slag by weight, putting the materials into a raw material crushing device for pre-crushing, and then putting the waste raw materials into a raw material mill for grinding to form a mixture;

(B) putting the mixture into a raw material bin, introducing air into the raw material bin, and raising the pressure in the raw material bin to 80-100kpa for stirring to form a blended raw material;

(C) adding the mixed raw material into a suspension preheater to preheat to 280 ℃, introducing the mixed raw material into a rotary kiln to heat to 1450 ℃ after preheating to form clinker;

(D) introducing the clinker into a cooling machine to be cooled to 100 ℃;

(E) adding the cooled clinker into a crusher for pre-crushing, adding 20-30 parts by weight of gypsum into the crushed clinker, adding the gypsum and the pre-crushed clinker into a grinding device at the same time, grinding into powder, and stirring to form the cement.

Comparative example 1:

(A) taking 15 parts of limestone, 15 parts of silica and 15 parts of clay by weight, putting the materials into a raw material crushing device for pre-crushing, and then putting the materials into a raw material mill for grinding to form a mixture;

(B) placing the mixture into a raw material bin, introducing air into the raw material bin, and raising the pressure in the raw material bin to 100kpa for stirring to form a blended raw material;

(C) adding the mixed raw material into a suspension preheater to preheat to 200 ℃, introducing the mixed raw material into a rotary kiln to heat to 1450 ℃ after preheating to form clinker;

(D) introducing the clinker into a cooling machine to be cooled to 100 ℃;

(E) adding the cooled clinker into a crusher for pre-crushing, adding 25 parts by weight of gypsum into the crushed clinker, adding the gypsum and the pre-crushed clinker into a grinding device simultaneously, grinding into powder, and stirring to form the cement.

Comparative example 2:

(A) taking 11 parts of fly ash, 8 parts of construction residual soil, 12 parts of sewage sludge incineration ash and 14 parts of glass slag according to weight, and then placing the waste raw materials in a raw material mill for grinding to form a mixture;

(B) placing the mixture into a raw material bin, introducing air into the raw material bin, and raising the pressure in the raw material bin to 100kpa for stirring to form a blended raw material;

(C) adding the mixed raw material into a suspension preheater to preheat to 200 ℃, introducing the mixed raw material into a rotary kiln to heat to 1450 ℃ after preheating to form clinker;

(D) introducing the clinker into a cooling machine to be cooled to 100 ℃;

(E) adding the cooled clinker into a crusher for pre-crushing, adding 25 parts by weight of gypsum into the crushed clinker, adding the gypsum and the pre-crushed clinker into a grinding device simultaneously, grinding into powder, and stirring to form the cement.

It can be seen that the examples 1 to 3 are all pre-crushed by the raw material crushing device, and the examples 1 to 3 are all made by using fly ash, construction residual soil, sewage sludge incineration ash and glass slag as raw materials, while the comparative example 1 is made by using limestone, silica, clay and other natural minerals to prepare cement, which increases the consumption of the natural minerals, and the examples 1 to 3 are all made by using waste raw materials to prepare cement, which saves the consumption of the natural minerals; in comparative example 2, the raw material is not pre-crushed by the raw material crushing device, which results in that the speed of grinding the waste raw material in the raw material mill is reduced.

And (C) heating the rotary kiln by using one or more of waste plastics, automobile broken residues, waste tires, waste oil and wood chips.

As shown in fig. 6 to 12, the fly ash, construction residual soil, sewage sludge incineration ash and glass slag are pre-crushed by a raw material crushing apparatus.

Raw materials breaker includes back plate 101, flexion 102, sieve 104, traveller 105, upstand 106, beam rod 107, arc clamp plate 108 and telescopic link I110, the front side of back plate 101 is from last to being provided with a plurality of sieve 104 that are parallel to each other down, the sieve mesh of a plurality of sieve 104 reduces from last to down in proper order, the left part of a plurality of sieve 104 all is provided with flexion 102, the right part fixedly connected with beam rod 107 of back plate 101, the left side of upstand 106 is from last to being provided with a plurality of travelers 105 that are parallel to each other down, one of them traveller 105 lateral sliding connection is on beam rod 107, fixedly connected with telescopic link I110 on beam rod 107, the expansion end fixed connection of telescopic link I110 is on upstand 106, the left side of a plurality of travelers 105 all is provided with arc clamp plate 108, a plurality of arc clamp plate 108 are located the right side of a plurality of sieve 104 respectively.

During the use, the old and useless raw materials that will make cement use two crushing roller 203 broken back once, make old and useless raw materials fall on the sieve 104 of the top, telescopic link I110 can drive upstand 106 when flexible and remove about, and then drive a plurality of travelers 105 and a plurality of arc clamp plate 108 and remove about simultaneously, and then drive a plurality of arc clamp plates 108 and be close to a plurality of flexion 102 departments respectively, and then both can help the raw materials on the sieve 104 of difference to whereabouts, can also make arc clamp plate 108 press to flexion 102, will not have abundant broken raw materials crushing, because the sieve mesh of a plurality of sieve 104 reduces from last to down in proper order, and then be in more garrulous that the raw materials on the sieve 104 of downside is handled, can fully screen the breakage after the raw materials falls from sieve 104 of downside.

The raw material crushing device further comprises a rib I103 and a rib II109, the right side of the bending part 102 is provided with a plurality of ribs I103, and the left side of the arc-shaped pressing plate 108 is provided with a plurality of ribs II 109.

When arc clamp plate 108 pressed to flexion 102, a plurality of bead II109 can press to a plurality of bead I103, and then the arc clamp plate 108 of being convenient for can be through a plurality of bead II109 and a plurality of bead I103 fully crushed the bold raw materials when pressing to flexion 102.

The raw material crushing device further comprises a crushing box 201, crushing rollers 203, a V-shaped plate 205, side blocking edges 206 and a front plate 207, the crushing box 201 is fixedly connected to the upper portion of the rear plate 101, two crushing rollers 203 driven by a motor are arranged in the crushing box 201, the upper portion of the front plate 207 is hinged to the front side of the crushing box 201, the front plate 207 is blocked at the front sides of the sieve plates 104, the front plate 207 is driven by the motor to rotate on the crushing box 201, the V-shaped plate 205 is arranged on the lower side of the front plate 207, the side blocking edges 206 are arranged on two sides of the V-shaped plate 205, and the V-shaped plate 205 is located below the sieve plates 104.

After putting into two crushing rollers 203 with the raw materials between, can be broken the raw materials, the raw materials after the breakage just can fall on a plurality of sieve 104 to after some raw materials on a plurality of sieve 104 do not fall down, take out some raw materials on a plurality of sieve 104 and continue the breakage once more between two crushing rollers 203, finally reach abundant broken effect. The rejected material that eventually falls off all the screen panels 104 is collected on the upper side of the V-shaped panel 205 and the two side ledges 206 serve to prevent the material from sliding off the sides of the V-shaped panel 205. The front plate 207 can be opened by rotating the front plate 207 forwards, and then qualified raw materials on the V-shaped plate 205 are taken down, so that the front sides of the plurality of screen plates 104 are all inclined downwards, unqualified raw materials on the plurality of screen plates 104 are poured out, and then unqualified raw materials fall on the V-shaped plate 205 to be collected, and are poured between the two crushing rollers 203 again, and then pass through the plurality of screen plates 104, so that the raw materials are qualified.

The raw material crushing device also comprises a vertical plate 111, a door-shaped frame 202, square columns 204, a bottom frame 301, a rotating frame 302, a circumferential rotating rod 303, a sliding hole 304, a sliding pin 305 and a telescopic rod II306, wherein the left side and the right side of the crushing box 201 are both fixedly connected with the square columns 204, the two square columns 204 are respectively and transversely connected with the left end and the right end of the door-shaped frame 202 in a sliding way, compression springs are sleeved on the two square columns 204 and are respectively positioned on the left side and the right side of the crushing box 201, the two compression springs are both positioned on the inner side of the door-shaped frame 202, the lower part of the rotating frame 302 is hinged on the bottom frame 301, the upper end of the rotating frame 302 is fixedly connected on the door-shaped frame 202, the vertical plate 111 is arranged on the rear side of the rear plate 101, the circumferential rotating rod 303 driven to rotate by a motor is arranged on the rotating frame 302, the circumferential rotating rod 303 corresponds to the vertical plate 111, the sliding hole 304 is arranged on the rotating frame 302, the telescopic rod II306 is fixedly connected on the bottom frame 301, the movable end of the telescopic rod II306 is fixedly connected with the sliding pin 305, the slide pin 305 is slidably connected to the slide hole 304.

Broken box 201 can remove about on door-shaped frame 202 through two square columns 204, two compression springs can help broken box 201 to get back to original position, make broken box 201 and a plurality of sieve 104 reciprocating motion about can, help a plurality of sieve 104 will be qualified material sieve down, can constantly touch with back plate 101 when circumference bull stick 303 rotates, and then drive a plurality of sieve 104 reciprocating motion about, telescopic link II306 can drive sliding pin 305 back-and-forth movement when flexible, and then drive revolving rack 302 and rotate at chassis 301, and then can drive the upper end of revolving rack 302 and incline forward, and then drive the equal downward sloping in front side of a plurality of sieve 104, pour out the qualified raw materials that do not on a plurality of sieve 104.