Semi-silica brick for 7.63-meter coke oven

A semi-silica brick and coke oven technology, applied in the field of refractory materials, can solve the problems of weak corrosion resistance, easy shrinkage, easy expansion, etc., and achieve the effect of high softening temperature under load, stable volume, and strong acid erosion resistance

Active Publication Date: 2008-02-06
山西盂县西小坪耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a 7.63m semi-silica brick for coke ovens in order to solve the problems of unstable volume, weak corrosion resistance and easy expansion and contraction under long-term high temperature in the existing semi-silica brick produced by using pyrophyllite raw material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 7.63m semi-silica bricks for coke ovens, expressed in weight percentage, the raw material formula contains Al 2 o 3 Raw bauxite coarse powder 8% and raw bauxite medium powder 48% with a content of 40%, Al 2 o 3 25% refractory clay fine powder 22%, SiO 2 22% of silica medium powder with a content of 97.5%, and the silica medium powder is crushed from five sets of silica; the raw bauxite coarse powder is composed of three parts, wherein the particle size ranges between Raw bauxite accounts for 60%, particles with a particle size range of 1-0.088mm account for 38%, and particles with a particle size range of 3 , PH is 4;

[0017] Put raw bauxite coarse powder, raw bauxite medium powder, refractory clay fine powder and silica medium powder into the wet mill according to the above ratio, then add potassium feldspar, add pulp after rolling for 1-2 minutes, and roll for 15 minutes. - 20 minutes to prepare the mud, and then knead until the mud is uniform, then it is rolled ...

Embodiment 2

[0019] 7.63m semi-silica bricks for coke ovens, expressed in weight percentage, the raw material formula contains Al 2 o 3 Raw bauxite coarse powder 12% and raw bauxite medium powder 44% with a content of 40-60%, Al 2 o 3 Refractory clay fine powder with content not less than 25% 26%, SiO 2 Silica medium powder with a content of not less than 97.5% is 18%, and the silica medium powder is crushed from five sets of silica; the raw bauxite coarse powder is composed of three parts, and the particle size range is between 1-3mm The raw bauxite in the middle accounts for 70%, the particles with a particle size range of 1-0.088mm account for 28%, and the particles with a particle size range of 3 , PH is 5;

[0020] Put raw bauxite coarse powder, raw bauxite medium powder, refractory clay fine powder and silica medium powder into the wet mill according to the above ratio, then add potassium feldspar, add pulp after rolling for 1-2 minutes, and roll for 15 minutes. - 20 minutes to p...

Embodiment 3

[0022] 7.63m semi-silica bricks for coke ovens, expressed in weight percentage, the raw material formula contains Al 2 o 3 Raw bauxite coarse powder 10% and raw bauxite medium powder 45% with a content of 40-60%, Al 2 o 3 Content not less than 25% refractory clay fine powder 25%, SiO 220% of silica medium powder with a content of not less than 97.5%. The silica medium powder is crushed from five sets of silica; the raw bauxite coarse powder is composed of three parts, and the particle size ranges between 1-3mm The raw bauxite in the middle accounts for 65%, the particles with a particle size range of 1-0.088mm account for 34%, and the particles with a particle size range of 3 , PH is 5;

[0023] Put raw bauxite coarse powder, raw bauxite medium powder, refractory clay fine powder and silica medium powder into the wet mill according to the above ratio, then add potassium feldspar, add pulp after rolling for 1-2 minutes, and roll for 15 minutes. - 20 minutes to prepare the m...

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PUM

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Abstract

The invention relates to the fire resistance material technical field, in particular to a half silica brick of 7.63m for coke oven, which solves the problem of unstable volume, weak rusty resistance, easy expansion and easy shrink in high temperature for long time of the prior the half silica brick which is produced by adopting pyrauxite material. The raw material formulation comprises crude bauxite cribble powder which is ranged from 8 percent to 12 percent, crude bauxite medium powder which is ranged from 44 percent to 48 percent, fire resistance clay fine powder which is ranged from 22 percent to 26 percent, silex medium powder which is ranged from 18 percent to 22 percent, potassium feldspar which is ranged from 1.9 percent to 2.1 percent and pulp which is ranged from 0.45 percent to 0.55 percent. The crude bauxite cribble powder, crude bauxite medium powder, fire resistance clay fine powder and silex medium powder are mixed into a wet roller pro rata, then potassium feldspar is mixed into and pulp is mixed after grinded for 1 to 2 minutes to get mud material after grinded from 15 to 20 minutes. The mud material is mixed to uniform and even, then gets out of the roller into a mold. The invention has the advantages of more superior rationalize index of half silica brick than the national standard, stable volume, strength acidity erosion resistance, unshrinkable function in high temperature1350 DEG C for long time, higher weight soften temperature. The invention completely coincides the demands for brick of coke oven and dry quenching coke oven.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a semi-silica brick for a 7.63m coke oven. Background technique [0002] Semi-silica bricks are semi-acidic refractory products between clay bricks and silica bricks, generally made of bauxite, refractory clay, pyrophyllite and kaolin as the main raw materials. According to the data, the semi-silica bricks produced by using pyrophyllite as raw material, in terms of raw material chemical indicators, in different ore bodies, due to the different ore-forming conditions, the mineral composition of pyrophyllite is quite different, and the general pyrophyllite contains iron. , potassium, sodium, calcium and magnesium and other oxidizing substances, therefore, pyrophyllite contains more impurities, and the mineral composition is quite complex. At the same time, pyrophyllite has a wide endothermic valley at around 665-670 ° C, which is due to pyrophyllite dehydroxylation As...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/10
Inventor 武本有武根怀郝良军韩八斤尹建斌
Owner 山西盂县西小坪耐火材料有限公司
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