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Carbon roaster flue wall guy brick precast block and production method thereof

A prefabricated block and roasting technology, which is applied in the field of carbon roasting furnace, can solve the problems of anode carbon block quality fluctuation, corrosion, energy waste, etc., and achieve the effect of improving anti-corrosion ability, increasing corrosion degree, and reducing processing procedures

Inactive Publication Date: 2017-01-11
河南鑫诚耐火材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Fired high-alumina bricks are usually made of fired high-alumina bricks with high load softening temperature and low high-temperature creep rate. The firing temperature is usually around 1400-1500°C. However, the production of fired high-alumina bricks per ton requires 90 ~ 100m 3 Or 350Kg coal, emission 900Kg CO 2 , causing great energy waste and environmental pollution, which is inconsistent with the development trend of modern high-temperature industry
At the same time, in the normal operation of the roasting furnace, in addition to the performance of high load softening temperature and low high-temperature creep rate, the bricks of the flue wall of the roasting furnace are also faced with alternating temperature changes and acidic high-temperature gases such as sulfides. Infiltration and erosion and other harsh environments, the bricks of the flue wall will gradually crack and deform, causing the flue wall to sink and sag inward, which will affect the normal temperature rise of the roasting furnace, and the quality of the anode carbon block will also fluctuate
In order to further improve the performance of flue wall pull bricks, some enterprises try to use low-cement steel fiber castable prefabricated flue wall pull bricks to improve their thermal shock resistance stability, but the effect in terms of corrosion resistance is still unsatisfactory. In the above work The environment corrodes quickly, and the material has a limited service life

Method used

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  • Carbon roaster flue wall guy brick precast block and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] With 70~80wt% high alumina bauxite clinker, 3~8wt% silicon carbide, 3~10wt% silica fume, 3~5wt% alumina powder, 3~10wt% kyanite fine powder, 3 ~5wt% pure calcium aluminate cement and 3~8wt% metal silicon powder are used as raw materials, plus 0.1wt% explosion-proof fiber and 0.2wt% sodium tripolyphosphate as admixtures, mix well, add water and stir, put into the mold Inside, it is molded in blocks by pouring vibration molding method, after natural curing for 24 hours, and finally baked at 110 ℃ ~ 300 ℃ for 24 hours, and then the prefabricated blocks of carbon roasting furnace flue wall drawn bricks are obtained.

[0030] The carbon roasting furnace flue wall drawing brick prefabricated block Al that present embodiment 1 makes 2 o 3 : 65~70%; normal temperature and pressure: 110~130MPa; high temperature flexural strength (1350℃×0.5h): ≥10~12MPa; thermal shock resistance (1100℃ water cooling, times): ≥45~48; 1100 ℃×3h acid corrosion resistance: no obvious erosion and pe...

Embodiment 2

[0032] With 65~75wt% high alumina bauxite clinker, 10~15wt% silicon carbide, 3~5wt% silica fume, 5~10wt% alumina powder, 5~8wt% kyanite fine powder, 4 ~8wt% pure calcium aluminate cement and 3~5wt% metal silicon powder are used as raw materials, plus 0.1wt% explosion-proof fiber and 0.2wt% sodium hexametaphosphate as admixtures, mix well, add water and stir, put into the mold Inside, it is molded in blocks by pouring vibration molding method, after natural curing for 36 hours, and finally baked at 110 ℃ ~ 300 ℃ for 24 hours, and then the prefabricated blocks of carbon roasting furnace flue wall drawn bricks are obtained.

[0033] The carbon roasting furnace flue wall drawing brick prefabricated block Al that present embodiment 2 makes 2 o 3 : 60~65%; normal temperature and pressure: 100~120MPa; high temperature flexural strength (1350℃×0.5h): ≥8~10MPa; thermal shock resistance (1100℃ water cooling, times): ≥45~50; 1100 ℃×3h acid corrosion resistance: no obvious erosion and p...

Embodiment 3

[0035]With 60~70wt% high alumina bauxite clinker, 10~20wt% silicon carbide, 3~5wt% silica fume, 3~8wt% alumina powder, 5~10wt% kyanite fine powder, 5 ~10wt% pure calcium aluminate cement and 4~6wt% metal silicon powder are used as raw materials, plus 0.1wt% explosion-proof fiber and 0.2wt% sodium citrate as admixtures, mix well, add water and stir, and put into the mold , formed in blocks by pouring vibration molding method, after 36 hours of natural curing, and finally baked at 110 ℃ ~ 300 ℃ for 48 hours, that is, the prefabricated blocks of carbon roasting furnace flue wall drawn bricks.

[0036] The carbon roasting furnace flue wall drawing brick prefabricated block Al that present embodiment 3 makes 2 o 3 : 60~65%; normal temperature and pressure: 100~125MPa; high temperature flexural strength (1350℃×0.5h): ≥9~11MPa; thermal shock resistance (1100℃ water cooling, times): ≥50~55; 1100 ℃×3h acid corrosion resistance: no obvious erosion and penetration; load softening tempe...

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Abstract

The invention discloses a carbon roaster flue wall guy brick precast block and a production method thereof. The carbon roaster flue wall guy brick precast block is produced by subjecting a mixture and an additive to mixing, stirring with water, molding by casting, curing and roasting, wherein the mixture comprises, by weight, 60-80% of bauxite chamotte, 5-20% of silicon carbide, 3-10% of silica fume, 3-10% of alumina powder, 3-10% of fine kyanite powder, 3-10% of pure calcium aluminate cement and 3-10% of metallic silicon, and the mass ratio of the mixture to the additive is 100 to 0.2-2. The production method includes mixing the mixture with the additive with the water added, pouring a mixed material into a mould and casting for vibration molding; roasting for 24-48 hours at 110-300 DEG C after natural curing so as to obtain a finished product. The carbon roaster flue wall guy brick precast block is low in production cost and simple in technology, properties such as the high-temperature creep rate and refractoriness under load can reach the levels of fired guy bricks, and the strength, the thermal-shock-resistant stability and sulfide corrodibility are superior to those of the fired guy bricks.

Description

technical field [0001] The invention relates to the technical field of carbon roasting furnaces, in particular to a prefabricated block of drawn bricks for a flue wall of a carbon roasting furnace and a preparation method thereof. Background technique [0002] The flue wall brick is a key component of the flue wall of the carbon roaster, and its quality directly affects the life of the flue wall, so the service life of the flue wall bricks is getting more and more attention. [0003] Fired high-alumina bricks are usually made of fired high-alumina bricks with high load softening temperature and low high-temperature creep rate. The firing temperature is usually around 1400-1500°C. However, the production of fired high-alumina bricks per ton requires 90 ~ 100m 3 Or 350Kg coal, emission 900Kg CO 2 , causing great energy waste and environmental pollution, which is inconsistent with the development trend of modern high-temperature industry. At the same time, in the normal oper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3208C04B2235/3217C04B2235/3222C04B2235/3418C04B2235/3463C04B2235/3826C04B2235/428C04B2235/96C04B2235/9692
Inventor 靳艳军刘培
Owner 河南鑫诚耐火材料股份有限公司
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