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Low-temperature burning high-aluminum refractory brick and preparation method thereof

A low-temperature firing and refractory brick technology, which is applied in the field of refractory material production, can solve the problems of slag line erosion, complex production process, high firing temperature, etc., achieve energy saving and consumption reduction, ecological environment protection, and lower firing temperature Effect

Inactive Publication Date: 2008-08-13
巩义市金岭耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the rapid development of iron and steel technology, the purification treatment of molten iron and molten steel also makes refractory bricks such as aluminum silicon carbide and aluminum chromium silicon carbide unable to fully meet the process requirements.
In particular, its poor oxidation resistance makes the erosion of the slag line serious and affects the service life of the kiln
Aluminum silicon carbide, aluminum chromium silicon carbide and other refractory bricks have high cost, complicated production process and high firing temperature, which are not conducive to the development of today's circular economy.

Method used

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  • Low-temperature burning high-aluminum refractory brick and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] a, preparation of major ingredients: get high alumina bauxite clinker (particle size is 3-0.088mm, Al 2 o 3 Content 82.15%) 63%, high alumina bauxite clinker powder (particle size less than 0.088mm, Al 2 o 3 content 80.05%) 7%, white corundum powder (particle size less than 0.088mm, Al 2 o 3 content 98.70%) 20%, pyrophyllite clinker is 4% as dry powder, refractory clay is 6% as dry powder for later use;

[0022] b. Preparation of binder: take 40% of pyrophyllite clinker, 30% of refractory clay powder, 2.0% of decoagulant, and 28% of water by weight, and make mud through water milling until the particle size is less than 200 mesh; The agent is made up of the following raw materials in weight ratio: sodium tripolyphosphate 20%, sodium carbonate 80%;

[0023] c. The binder is added to the main material, and the addition amount is 12% of the weight sum of the raw materials in the main material; the traditional brick-making process is used for mixing, machine pressing, ...

Embodiment 2

[0026] a, preparation of major ingredients: get high alumina bauxite clinker (particle size is 3-0.088mm, Al 2 o 3 Content 78.32%) 65%, high alumina bauxite clinker powder (particle size less than 0.088mm, Al 2 o 3 content 76.70%) 13%, tabular corundum powder (particle size less than 0.088mm, Al 2 o 3 Content 99.04%) 10%, pyrophyllite raw material 6% as dry powder, refractory clay 6% as dry powder for later use;

[0027] b. Preparation of binder: Take 43% of pyrophyllite raw material, 30% of refractory clay powder, 2.0% of decoagulant, and 25% of water by weight, and grind them with water until the particle size is less than 200 meshes, and make mud; The coagulant is composed of the following raw materials in weight ratio: sodium tripolyphosphate 50%, sodium silicate 50%;

[0028] c. The binder is added to the main material, and the amount added is 16% of the weight sum of the raw materials in the main material; the traditional brick-making process is used for mixing, mac...

Embodiment 3

[0031] a, preparation of major ingredients: get high alumina bauxite clinker (particle size is 3-0.088mm, Al 2 o 3 Content 71.57%) 65%, high alumina bauxite clinker powder (particle size less than 0.088mm, Al 2 o 3 Content 68.70%) 11%, sub-white corundum powder (particle size less than 0.088mm, Al 2 o 3 Content 97.86%) 10%, pyrophyllite raw material 8% as dry powder, refractory clay 6% as dry powder for later use;

[0032] b. Preparation of binder: Take 60% of pyrophyllite raw material, 39% of refractory clay powder, and 1.0% of decoagulant by weight, and use dry powder co-grinding process to make mixed powder. The co-milled powder fineness should be less than 320 mesh . Wherein said decoagulant is made up of the raw material of following weight ratio: sodium carbonate 80%, sodium silicate 20%;

[0033] c. The binder is added to the main material, and the amount added is 10% of the weight of the raw materials in the main material; the traditional brick-making process is ...

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Abstract

The present invention provides a low-temperature braking high-aluminum refractory brick and the preparing method thereof, and the invention is characterized in that the refractory brick is prepared by the following main raw material and bonding agent; wherein: the main material comprises the raw material with the following weight proportion: wherein the bauxite chamotte with granularity 3-0.088mm for 50-70%, bauxite chamotte with granularity less than 0.088 for 7-20%, emery with granularity less than 0.088 for 5-20%, dry powder shaped pyrophyllite for 2-10%, and dry powder shaped refractory clay for 5-20%; and the adding amount of the bonding agent is 10-20% of the weight of the raw material. The high-alumina brick is obtained using the low ore grade bauxite chamotte with low temperature 1250-1350 DEG C, and the high-quality refractory brick has the advantages of: ordinary-temperature compressive strength above 80MPa, and the load softening staring temperature above 1580 DEG C.

Description

technical field [0001] The invention belongs to the technical field of refractory material production, and relates to a low-temperature fired high-alumina refractory brick and a preparation method thereof. The refractory brick can be used in the parts contacting with the metal melt such as mixing iron furnace, iron melting furnace, iron ladle, steel ladle, etc., as well as special parts such as lime kiln which require strong alkali corrosion resistance. technical background [0002] Common high-alumina refractory bricks are mostly used in mixed iron furnaces, iron furnaces, ladles, steel drums and lime kilns. Due to the disadvantages of low compressive strength, high porosity and poor corrosion resistance of ordinary high-alumina refractory bricks, the large-scale use of ordinary high-alumina refractory bricks is limited. In order to meet the special requirements of the above-mentioned furnaces, researchers have researched and developed aluminum silicon carbide, aluminum ch...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/10C04B35/111
Inventor 刘永春刘永升方昌荣宋继昌谢朝晖潘之雄曹一
Owner 巩义市金岭耐火材料有限公司
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