Heat-conductive and energy-saving refractory brick used for fire path wall in carbon roasting furnace and preparation method thereof

A refractory brick and roasting technology, which is applied in the field of heat-conducting and energy-saving refractory bricks for the flue wall of carbon roasting furnaces and its preparation, can solve the problems of low softening temperature under load, low thermal shock stability, and low high-temperature flexural strength, and achieve High softening temperature under load, high thermal shock stability, high temperature flexural strength

Inactive Publication Date: 2016-03-23
董建军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to overcome the defects of the above-mentioned prior art, and provide a heat-conducting and energy-saving refractory brick for a carbon roasting furnace flue wall and a preparation method thereof. The heat-conducting and energy-saving refractory brick for a carbon roasting furnace flue wall prepared by the present invention It overcomes the defects of low thermal shock stability of existing refractory bricks, low load softening temperature, low high-temperature flexural strength, large wall cracks caused by brick size shrinkage during high-temperature use, and high-temperature creep rate

Method used

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  • Heat-conductive and energy-saving refractory brick used for fire path wall in carbon roasting furnace and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] S1, crushing mullite, andalusite, silicon carbide, tertiary bauxite, and high alumina corundum respectively;

[0041] A1. Crushing the mullite to screen out granular materials with a particle size of 0.1 to 3 mm;

[0042] A2, crushing the three-grade high-alumina bauxite, and screening out the granular material with a particle size of 0.1-5 mm;

[0043] A3, crush the high alumina corundum and andalusite, and screen out the granular material with a particle size of 0.1-1mm;

[0044] S2. Select 16 parts by mass of super-grade high-alumina bauxite, 8 parts by mass of silicon carbide, 10 parts by mass of brown corundum, 5 parts by mass of alumina, 5 parts by mass of high-quality bonded clay, 1 mass part Parts of metal silicon are mixed, co-milled in a ball mill, and processed into a mixed fine powder with a particle size of less than 0.088mm;

[0045]S3, choose the mullite particle of 15 parts by mass, the andalusite particle of 10 parts by mass, the silicon carbide parti...

Embodiment 2

[0050] S1, crushing mullite, andalusite, silicon carbide, tertiary bauxite, and high alumina corundum respectively;

[0051] A1. Crushing the mullite to screen out granular materials with a particle size of 0.1 to 3 mm;

[0052] A2, crushing the three-grade high-alumina bauxite, and screening out the granular material with a particle size of 0.1-5 mm;

[0053] A3, crush high alumina corundum, silicon carbide, andalusite, and screen out the granular material with a particle size of 0.1-1mm;

[0054] S2. Select 20 parts by mass of super-grade high-alumina bauxite, 5 parts by mass of silicon carbide, 5 parts by mass of andalusite, 3 parts by mass of alumina, 10.5 parts by mass of high-quality bonded clay, and 1.5 parts by mass of Parts of metal silicon are mixed, co-milled in a ball mill, and processed into a mixed fine powder with a particle size of less than 0.088mm;

[0055] S3, select the mullite particle of 10 parts by mass, the andalusite particle of 8 parts by mass, the ...

Embodiment 3

[0060] S1, crushing mullite, andalusite, silicon carbide, tertiary bauxite, and high alumina corundum respectively;

[0061] A1. Crushing the mullite to screen out granular materials with a particle size of 0.1 to 3 mm;

[0062] A2, crushing the three-grade high-alumina bauxite, and screening out the granular material with a particle size of 0.1-5 mm;

[0063] A3, crush high alumina corundum, silicon carbide, andalusite, and screen out the granular material with a particle size of 0.1-1mm;

[0064] S2. Select 13 parts by mass of super-grade high-alumina bauxite, 8 parts by mass of silicon carbide, 5 parts by mass of brown corundum, 8 parts by mass of andalusite, 10 parts by mass of high-quality bonded clay, 1 mass part Parts of metal silicon are mixed, co-milled in a ball mill, and processed into a mixed fine powder with a particle size of less than 0.088mm;

[0065] S3, select the mullite particle of 10 parts by mass, the andalusite particle of 5 parts by mass, the silicon ...

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Abstract

The invention discloses a heat-conductive and energy-saving refractory brick used for a fire path wall in a carbon roasting furnace and a preparation method thereof. The heat-conductive and energy-saving refractory brick is composed of an aggregate, a mixed fine powder and an additive according to the mass ratio of 30:30-35:5-10. The aggregate is prepared by mixing three or more components of mullite, andalusite, silicon carbide, three-grade high-aluminum bauxite and high-aluminum corundum granules and is 0.1-5 mm in granular size; the mixed fine powder is prepared by mixing four or more components of special-grade high-aluminum bauxite, sillimanite, silicon carbide, brown fused alumina, aluminum oxide, andalusite, high-quality combined clay and metal silicon fine powder and is less than 0.088 mm in granular size; and the additive is calcium lignosulphonate powder. The heat-conductive and energy-saving refractory brick is high in thermal shock stability and low in high-temperature creep rate, is high in refractoriness under load and is high in high-temperature bending strength.

Description

technical field [0001] The invention relates to the technical field of carbon roasting furnaces, in particular to a heat-conducting and energy-saving refractory brick for a carbon roasting furnace flue wall and a preparation method thereof. Background technique [0002] In the modern carbon industry, it is very common to use a roaster to produce anode carbon blocks. The main task of the carbon roaster is to roast anode carbon blocks for electrolytic aluminum. [0003] The flue wall of the roasting furnace in the prior art is made of clay refractory bricks. The fuel is burned in the fire path, and the heat is transferred to the anode carbon block in the adjacent material box through the refractory brick wall. The anode carbon block does not touch the flame. roasted in an atmosphere. [0004] The clay refractory bricks used in the flue wall of the prior art have poor thermal conductivity and poor conductivity, resulting in uneven temperature distribution in the roasting furna...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/103C04B35/65
CPCC04B35/103C04B35/65C04B2235/3463C04B2235/349C04B2235/3826C04B2235/428C04B2235/5427C04B2235/5436C04B2235/77C04B2235/96C04B2235/9607
Inventor 董建军
Owner 董建军
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