阅读说明：本技术 一种热风炉蓄热格子砖制作方法 (Manufacturing method of heat storage checker brick of hot blast stove ) 是由 李静 于 2021-05-07 设计创作，主要内容包括：本发明涉及热风炉保温技术领域,尤其涉及一种热风炉蓄热格子砖制作方法,所述蓄热格子砖包括格子砖本体,格子砖本体上均布有通孔,通孔内设有辐射材料套层,所述格子砖本体由常规耐火材料制成,所述辐射材料套层由高辐射耐火材料制成；包括如下步骤：备料、准备模具、一次成型、二次成型、烘焙和烧制；利用本发明方法制作的蓄热格子砖的辐射材料套层厚度大、辐射导热效果好,不易脱落、使用寿命长。(The invention relates to the technical field of heat preservation of hot blast stoves, in particular to a method for manufacturing a heat storage checker brick of a hot blast stove, wherein the heat storage checker brick comprises a checker brick body, through holes are uniformly distributed on the checker brick body, radiation material sleeve layers are arranged in the through holes, the checker brick body is made of conventional refractory materials, and the radiation material sleeve layers are made of high-radiation refractory materials; the method comprises the following steps: preparing materials, preparing a mould, carrying out primary forming, secondary forming, baking and firing; the heat storage checker brick manufactured by the method has the advantages of large thickness of the radiation material jacket layer, good radiation heat conduction effect, difficult falling and long service life.)

1. A method for manufacturing a heat storage checker brick of a hot blast stove is characterized by comprising the following steps:

the heat storage checker brick comprises a checker brick body made of a first material, through holes are uniformly distributed on the checker brick body, and radiation material jacket layers made of a second material are arranged in the through holes;

the preparation method comprises the following steps:

1) preparing materials: preparing conventional refractory material powder and high-radiation refractory material powder;

2) preparing a mould: manufacturing a one-time forming pressing die and a secondary forming pressing die; the one-time forming pressing die comprises a one-time die column for forming a through hole; the secondary forming pressing die comprises a secondary die column for forming the radiation material jacket layer; the diameter of the primary mold pillar is larger than that of the secondary mold pillar;

the one-step forming pressing die is used for preparing the biscuit of the checker brick body;

the secondary forming pressing die is used for forming the radiation material jacket layer on the basis of the biscuit of the checker brick body through secondary distribution;

3) one-step forming: placing the one-step forming pressing mold on a press machine, distributing by adopting conventional refractory material powder, and performing press forming to form a biscuit of the checker brick body;

4) secondary molding: placing the secondary forming pressing die on a press machine, placing the biscuit of the checker brick body in a lower die of the secondary forming pressing die, distributing high-radiation refractory material powder, and performing press forming to form the biscuit of the heat storage checker brick;

5) baking: putting the biscuit of the heat storage checker brick into a drying box for drying;

6) firing: and (3) placing the biscuit of the heat storage checker brick baked in the step 5) in a high-temperature furnace for baking to form a finished heat storage checker brick.

2. The method for producing a heat-accumulative checker brick according to claim 1, wherein the diameter of the primary mold pillar of the primary molding press mold is 2 to 10 mm larger than the standard through-hole diameter of the heat-accumulative checker brick; the diameter of the secondary mold column of the secondary molding pressing mold is equal to the diameter of the standard through hole of the heat storage checker brick.

3. The method for manufacturing a heat storage checker brick according to claim 1, wherein the material distribution height of the one-shot forming press mold is 100% to 115% of the standard height of the heat storage checker brick.

4. A method of making a heat accumulating checker brick as recited in claim 1, further comprising spraying glue onto the one-shot formed biscuit of the checker brick body.

5. A method of making a heat accumulating checker brick as claimed in claim 1, wherein the checker brick body is made of a conventional refractory material and the jacket of radiant material is made of a high-radiant refractory material.

6. A method of making a heat accumulating checker brick according to claim 5, wherein said conventional refractory material is one or more of rare earth oxide, silica, corundum, clay, bentonite, spinel.

7. The method of making a heat-accumulating checker brick according to claim 1, further comprising a hot-blast stove heat-accumulating checker brick processing system, characterized in that;

the processing system comprises a primary press and a secondary press, wherein a primary forming pressing die and a secondary forming pressing die are respectively arranged on the primary press and the secondary press; the primary press is used for forming a biscuit of the checker brick body; the secondary press is used for forming the biscuit of the heat storage checker brick.

8. The method of making a hot blast stove heat accumulating checker brick of claim 7, further comprising a hot blast stove heat accumulating checker brick processing system including a primary feeding device and a secondary feeding device for feeding the primary forming press die and the secondary forming press die, respectively.

9. The method of making a heat accumulating checker brick for a hot blast stove of claim 7, further comprising a checker brick body biscuit transfer mechanism disposed between the primary press and the secondary press.

10. The method of making a heat accumulating checker brick for a hot blast stove according to any one of claims 7, further comprising a glue spraying device provided between the primary press or the secondary press, or between the primary press and the secondary press.

Technical Field

The invention relates to the technical field of hot blast stoves, in particular to a method for manufacturing a heat storage checker brick of a hot blast stove.

Background

The high-radiation coating technology is a surface treatment technology which coats a layer of coating material with high emissivity on the surface of a refractory material or a machine body and changes the physical and chemical properties of the surface of the original machine body. The energy-saving mechanism of the technology is that the absorption rate and the emissivity of the furnace lining to infrared radiation are improved by using a material with higher blackness, so that the complete combustion of fuel is promoted, and the fuel is saved; the thermal efficiency of the furnace is improved.

The checker bricks with seven holes, nineteen holes and twenty-seven holes are usually adopted as heat exchangers for a top-fired hot blast stove, in order to improve the heat energy heat storage quantity heat conduction radiation efficiency of the checker bricks, in recent ten years, high-radiation paint is adopted as a coating to realize the effect, the technology of dipping the radiation paint coating on the surface of the checker bricks has some disadvantages, the coating is not uniform in adhesive force and permeability due to simple and rough construction, so that the effect of easy falling off is not obvious in the use process, but in the ten years, the method also obtains the heat exchange effect higher than that of not coating the coating.

Once the top-fired hot-blast stove is built, the service life of the heat storage checker bricks can reach 15 years, the heat storage checker bricks are soaked in a container filled with liquid radiation coating by adopting a method of dipping and coating the radiation coating, although the liquid radiation coating permeates the surfaces of the heat storage checker bricks, a permeable layer is thinner and is generally less than 0.3 mm, the thickness of the permeable layer is more difficult to reach 1 mm, and the coating basically falls off within 3 years; the radiation layer is sparse, so that the radiation heat conduction effect is limited; in addition, when a plurality of checker bricks are combined into a whole to form the suspended ceiling of the top combustion type hot blast stove, the heat radiation and conduction effect is mainly achieved, the heat radiation and conduction effect is through holes, and the relative effect of other side parts is not large; thus, focusing on the solution of the radiation coating in the through-hole is one way to solve the drawbacks of the prior art.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a method for manufacturing a heat storage checker brick of a hot blast stove.

A method for manufacturing a heat storage checker brick of a hot blast stove comprises a checker brick body made of a first material, through holes are uniformly distributed on the checker brick body, and a radiation material jacket layer made of a second material is arranged in the through holes;

the preparation method comprises the following steps:

1) preparing materials: preparing conventional refractory material powder and high-radiation refractory material powder;

2) preparing a mould: manufacturing a one-time forming pressing die and a secondary forming pressing die; the one-time forming pressing die comprises a one-time die column for forming the through hole; the secondary forming pressing die comprises a secondary die column for forming the radiation material jacket layer; the diameter of the primary mold pillar is larger than that of the secondary mold pillar; the diameter of the primary mold column is equal to that of the through hole;

the one-step forming pressing die is used for preparing the biscuit of the checker brick body;

the secondary forming pressing die is used for forming the radiation material jacket layer on the basis of the biscuit of the checker brick body through secondary distribution;

3) one-step forming: placing the one-step forming pressing mold on a press machine, distributing by adopting conventional refractory material powder, and performing press forming to form a biscuit of the checker brick body;

4) secondary molding: placing the secondary forming pressing die on a press machine, placing the biscuit of the checker brick body in a lower die of the secondary forming pressing die, distributing high-radiation refractory material powder, and performing press forming to form the biscuit of the heat storage checker brick;

5) baking: putting the biscuit of the heat storage checker brick into a drying box for drying;

6) firing: and (3) placing the biscuit of the heat storage checker brick baked in the step 5) in a high-temperature furnace for baking to form a finished heat storage checker brick.

The method for manufacturing the checker brick has the beneficial effects that: distributing the material on the once-formed checker brick body biscuit twice, distributing the high-radiation refractory material in the through hole of the checker brick body biscuit, then tightly combining the high-radiation refractory material and the checker brick body biscuit by a secondary forming and pressing method to prepare a heat storage checker brick biscuit, and after drying and firing, forming a radiation jacket layer in the through hole of the checker brick body with large thickness, large adhesive force and difficult shedding, so that the prepared heat storage checker brick has long service life; and the process of secondary material distribution and pressing reduces the use of high-radiation refractory materials on other side parts of the checker brick, and saves the cost.

The radiant jacket layer in the through hole of the hot blast stove heat storage checker brick manufactured by the method has large thickness and good radiant heat conduction effect, and the radiant jacket layer is not easy to fall off in the using process and has long service life.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, the diameter of the primary mold column of the primary molding pressing mold is 2-10 mm larger than the diameter of the standard through hole of the heat storage checker brick; the secondary pillar diameter of the secondary molding press mold is equal to or smaller than (irrespective of sintering shrinkage) the standard through-hole diameter of the heat accumulating checker brick.

The beneficial effect who adopts above-mentioned further scheme is, guarantees that the through-hole of the checker brick body that the one shot forming suppression formed is greater than the standard through-hole of heat accumulation checker brick, reserves the space of secondary cloth and post forming suppression, and the secondary mold column diameter equals the size that the standard through-hole diameter of heat accumulation checker brick guaranteed that the through-hole of the heat accumulation checker brick that makes reaches standard through-hole.

Further, the material distribution height of the one-step forming pressing die is 100% -115% of the standard height of the heat storage checker brick.

The beneficial effect of adopting the above further scheme is that a one-step forming pressing space is reserved, and the height of the pressed checker brick biscuit is ensured to reach the standard height of the heat storage checker brick.

Further, glue is sprayed on the biscuit of the checker brick body formed by one-step forming.

The hot blast stove heat storage checker brick processing system comprises a primary press and a secondary press, wherein the primary press and the secondary press are respectively provided with a primary forming pressing die and a secondary forming pressing die; the primary press is used for forming a biscuit of the checker brick body; the secondary press is used for forming the biscuit of the heat storage checker brick.

The beneficial effect of adopting the further scheme is that: the high-radiation refractory material of the heat storage checker brick is better combined with the checker brick body through twice molding and pressing, the heat storage checker brick is better in radiation heat conduction effect and longer in service life through twice pressing.

Further, the device also comprises a primary feeding device and a secondary feeding device which are used for respectively feeding the primary forming pressing die and the secondary forming pressing die.

The beneficial effect who adopts above-mentioned further scheme is, guarantees that the system can in time give one shot forming embossing mold utensil and post forming embossing mold utensil cloth.

Further, the device also comprises a checker brick body biscuit conveying device arranged between the primary press and the secondary press.

The technical scheme has the beneficial effect that the biscuit of the checker brick body after one-step forming and pressing is ensured to be stably conveyed to the secondary forming pressing die.

Further, the glue spraying device is arranged between the primary press and the secondary press or between the primary press and the secondary press.

The beneficial effect of adopting above-mentioned further scheme is, guarantee to spout glue before carrying out the secondary forming suppression on checker brick body biscuit.

The heat storage checker brick biscuit has the beneficial effects that the high-radiation refractory material can be better combined with the checker brick body biscuit in the secondary material distribution process after glue spraying, the material distribution effect is better, the radiation jacket layer of the heat storage checker brick biscuit after secondary forming pressing is not easy to fall off before firing, and the processing stability is ensured.

In addition, the problems of uneven adhesion and permeability of the jacket layer and falling of the jacket layer are solved, the heat exchange conduction radiation efficiency of the heat accumulator of the hot blast stove is greatly improved, and the consumption of fuel gas is reduced.

Drawings

FIG. 1 is a schematic view of a thermal storage checker brick of the present invention;

FIG. 2 is a schematic flow chart of a method for manufacturing the heat-accumulating checker brick of the present invention;

FIG. 3 is a schematic longitudinal cross-sectional view of the single-stage molding die of the present invention;

FIG. 4 is a schematic structural view of a transverse section of the one-shot forming die of the present invention;

FIG. 5 is a schematic longitudinal cross-sectional view of the overmolding die of the invention;

FIG. 6 is a schematic view of a transverse cross-section of the overmolding die of the invention;

fig. 7 is a schematic view of a process for forming a heat accumulating checker brick of the present invention;

FIG. 8 is a schematic view of a hot blast stove heat storage checker brick processing system of the present invention;

in fig. 1 to 8, 1, a checker brick body; 2. a through hole; 3. a jacket layer; 4. a semicircular hole; 5. forming a pressing die at one time; 5-1, primary mold columns; 5-2, performing primary mould-forming; 5-3, primary lower die; 6. secondary forming pressing mould; 6-1, secondary mold columns; 6-2, secondary mould-loading; 6-3, secondary lower die; .

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

As shown in fig. 1 to 7, a method for manufacturing a heat storage checker brick for a hot blast stove comprises a checker brick body made of a first material, through holes are uniformly distributed on the checker brick body, and radiation material jacket layers made of a second material are arranged in the through holes;

the preparation method comprises the following steps:

1) preparing materials: preparing conventional refractory material powder and high-radiation refractory material powder;

2) preparing a mould: manufacturing a primary forming pressing die 5 and a secondary forming pressing die 6; the one-step forming pressing die 5 comprises a one-step die column 5-1 for forming the through hole 2; the secondary molding press die 6 comprises a secondary mold pillar 6-1 for forming the radiation material jacket layer 3; the diameter D of the primary mold pillar 5-1 is larger than the diameter D of the secondary mold pillar 6-1; the diameter of the primary mold pillar 5-1 is equal to that of the through hole 2;

the one-step forming pressing die 5 is used for preparing the biscuit of the checker brick body;

the secondary forming pressing die 6 is used for forming the radiation material jacket layer 3 through secondary distribution on the basis of the biscuit of the checker brick body;

3) one-step forming: arranging the one-step forming pressing die 5 on a press machine, distributing by adopting conventional refractory material powder, and performing press forming to form a biscuit of the checker brick body;

4) secondary molding: placing the secondary forming pressing die 6 on a press machine, placing the biscuit of the checker brick body in a lower die of the secondary forming pressing die 6, distributing high-radiation refractory material powder, and performing press forming to form the biscuit of the heat storage checker brick;

5) baking: putting the biscuit of the heat storage checker brick into a drying box for drying;

7) firing: and (3) placing the biscuit of the heat storage checker brick baked in the step 5) in a high-temperature furnace for baking to form a finished heat storage checker brick.

The diameter of the primary mold column 5-1 of the primary forming pressing mold 5 is 2-10 mm larger than the diameter of the standard through hole of the heat storage checker brick; the secondary mold pillar 6-1 diameter of the secondary molding press 6 is equal to (irrespective of sintering shrinkage) the standard through-hole diameter of the thermal storage checker brick. The through holes of the checker brick body formed by one-step forming and pressing are larger than the standard through holes of the heat storage checker brick, space for secondary material distribution and secondary forming and pressing is reserved, and the diameter of the secondary mold column 6-1 is equal to the diameter of the standard through holes of the heat storage checker brick, so that the through holes of the manufactured heat storage checker brick reach the size of the standard through holes.

The cloth height of the one-step forming pressing die 5 is 100% -115% of the standard height of the heat storage checker brick, a one-step forming pressing space is reserved, and the height of a biscuit of the pressed checker brick is guaranteed to reach the standard height of the heat storage checker brick. Still include once only the shaping form spout glue on the checker brick body biscuit, the checker brick body biscuit after spouting the glue can be better in the in-process high radiation refractory material of secondary cloth combine with checker brick body biscuit, and the cloth effect is better, and the radiation jacket layer of the heat accumulation checker brick biscuit after the secondary shaping suppression is difficult for droing before firing, has guaranteed the stability of processing.

As shown in fig. 8, the hot blast stove heat storage checker brick processing system for realizing the manufacturing method comprises a primary press and a secondary press, wherein the primary press and the secondary press are respectively provided with a primary forming pressing die and a secondary forming pressing die; the primary press is used for forming a biscuit of the checker brick body; the secondary press is used for forming the biscuit of the heat storage checker brick.

The device also comprises a primary feeding device and a secondary feeding device which respectively feed the primary forming pressing die and the secondary forming pressing die.

The checker brick body biscuit conveying device is arranged between the primary press and the secondary press. The glue spraying device is arranged between the primary press and the secondary press or between the primary press and the secondary press.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.