Corundum-mullite zircon fire-proofing material and preparation method thereof

A refractory material, mullite technology, applied in the field of refractory materials, can solve the problems of high thermal shock resistance, high creep resistance and high strength performance, difference in quality of mullite bricks, low load softening temperature, etc., to achieve Good thermal shock resistance, high softening temperature under load, uniform and dense structure

Active Publication Date: 2012-10-31
ZHENGZHOU ANNEC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cordierite and mullite cordierite refractory materials have low thermal expansion coefficient, good strength, good thermal shock resistance and chemical corrosion resistance, but their load softening temperature is low and the service temperature range is narrow
High alumina mullite brick is theoretically an ideal refractory material for hot blast stoves. However, due to the difference in the synthesis process of mullite raw materials, the quality of mullite bricks varies greatly, and it is difficult to achieve high Unification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 18% of tabular alumina with a purity greater than 99% and a particle size of 3-1mm, 22% of white corundum with a purity greater than 99% and a particle size of 3-1mm, 3% of 200-mesh white corundum with a purity of greater than 94% and a particle size of 1-0mm Put 20% of brown corundum into the high-speed sand mixer and knead for 5 minutes, then add 8% of mullite, α-Al 2 o 3 13%, sillimanite 11%, the proportion of the added binder to the total weight of the original ingredients is 3%, after mixing for 5 minutes, add 4% zircon powder, 2% silica powder, and Guangxi clay 2% for high-speed mixing for 15 minutes, use The high-tonnage friction brick press presses the kneaded mud into high-density semi-finished products, and puts the semi-finished products into a dryer for drying at a drying temperature of 80-120°C for 36 hours, then puts the dried biscuits into an electric furnace or a tunnel kiln Inside, the sintering temperature is 1600°C, the holding time is 12h, after sin...

Embodiment 2

[0026] Put 25% of tabular alumina with a purity greater than 99% and a particle size of 3-1mm, 20% of white corundum with a purity greater than 99% and a particle size of 3-1mm, and 15% of brown corundum with a purity greater than 94% and a particle size of 1-0mm into the high-speed After mixing in the sand mixer for 5 minutes, add 12% of mullite and 12% of sillimanite. The added amount of binder accounts for 3% of the total weight of the original ingredients. After mixing for 5 minutes, add 3% of white corundum powder, zirconium Quartz powder 4%, α-Al 2 o 3 6%, microsilica powder 3%, kneading at high speed for 15 minutes, using a high-tonnage friction brick press to press the kneaded mud into high-density semi-finished products, and put the semi-finished products in a dryer to dry at a drying temperature of 80-120°C 36h, put the dried bricks into the electric furnace or tunnel kiln, the sintering temperature is 1650°C, the holding time is 8h, after sintering, it is fired, an...

Embodiment 3

[0028] Put 30% of tabular alumina with a purity greater than 99% and a particle size of 3-1mm, 15% of white corundum with a purity greater than 99% and a particle size of 3-1mm, and 15% of brown corundum with a purity greater than 94% and a particle size of 1-0mm into the high-speed After 5 minutes of mixing in the sand mixer, 16% of sillimanite was added, and the amount of the added binder accounted for 3% of the total weight of the original ingredients. After 5 minutes of mixing, 5% of white corundum powder and α-Al 2 o 3 8%, 4% zircon powder, 2% silica powder, 5% Guangxi clay, high-speed kneading for 15 minutes, using a high-tonnage friction brick press to press the kneaded mud into high-density semi-finished products, and put the semi-finished products into the dryer Drying, the drying temperature is 80-120°C, and the time is 36h. Put the dried biscuit into the electric furnace or tunnel kiln, the sintering temperature is 1600°C, and the holding time is 12h. Furnace ceram...

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Abstract

The invention discloses a corundum-mullite zircon fire-proofing material. The corundum-mullite zircon fire-proofing material comprises the following materials according to certain weight percentage, the particle size and the purity: plate-shaped corundum, white corundum, brown corundum, mullite, sillimanite, zirconite, alpha-Al2O3, silicon powder and Guangxi clay, and is formed by adding a binding agent. The invention also discloses a preparation method of the fire-proofing material. The fire-proofing material prepared by the invention is widely used in a high-blast-temperature internal combustion stove ceramic burner and has the advantages of high refractoriness under load, good anti-seismic performance under the high temperature, high compression strength, good creep resistance and the like.

Description

technical field [0001] The invention relates to a refractory material, in particular to a refractory material with high load softening temperature, good thermal shock resistance, high compressive strength and good creep resistance for a ceramic burner of a high-temperature internal combustion hot blast stove. technical background [0002] At present, the average air temperature of hot blast stoves in China is 1125 degrees. If the air temperature is raised to 1350 degrees above the level of developed countries, the current cordierite and high-alumina mullite materials will not be able to adapt. The increase of air temperature is an extremely effective method for blast furnace energy saving. For every 100 degree increase in air temperature, the blast furnace can save about 20 kg of coke, and the effect of energy saving and emission reduction is obvious. The temperature of the hot blast stove is high all the year round, and the intermittent air supply makes the temperature in t...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 董红芹李富朝李建涛孙庚辰陈泉锋
Owner ZHENGZHOU ANNEC IND
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