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A method for making a sealing cover for the observation and operation hole of the flue wall of a carbon roasting furnace

A manufacturing method and technology of operating holes, which are applied in the field of manufacturing sealing covers for observation and operating holes in the flue wall of carbon roasting furnaces, can solve the problems of general physical and chemical performance indicators such as load softening temperature, poor thermal shock stability, and low high-temperature flexural strength And other problems, to achieve the effect of excellent physical and chemical performance indicators, good thermal shock stability, high temperature flexural strength

Active Publication Date: 2011-12-14
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] The sealing cover of the observation operation hole in the prior art is generally made of ordinary aluminum-silicon refractory materials, which generally have low high-temperature flexural strength, poor thermal shock stability, and general physical and chemical performance indicators such as load softening temperature.

Method used

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  • A method for making a sealing cover for the observation and operation hole of the flue wall of a carbon roasting furnace
  • A method for making a sealing cover for the observation and operation hole of the flue wall of a carbon roasting furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: choose the raw material component of following parts by weight:

[0032] Mullite particles (AL 2 o 3 55~70%), 65,

[0033] High alumina bauxite clinker particles (AL2O3 50-60%), 10,

[0034] Andalusite particles (AL2O3 50-65%), 10,

[0035] The particle diameters of the above-mentioned particles are all 0-8mm,

[0036] Mullite fine powder (AL 2 o 3 55~70%), 10,

[0037] High alumina bauxite clinker fine powder (AL2O3 50-60%), 5,

[0038] Sillimanite fine powder (AL 2 o 3 50~60%), 5,

[0039] The mesh numbers of the above fine powders are all 180 mesh,

[0040] Alumina powder (AL 2 o 3 ≥98%) 300 mesh, 3,

[0041] High alumina cement fine powder (AL 2 o 3 ≥70%) 200 mesh, 5,

[0042] Silica powder (SiO2≥90%) 300 mesh, 4,

[0043] High-temperature heat-resistant steel fiber (length 5-50mm), 2,

[0044] Sodium tripolyphosphate, 0.1,

[0045] Sodium hexametaphosphate, 0.15,

[0046] After mixing according to the parts by weight, add it to...

Embodiment 2

[0047] Embodiment 2: choose the raw material component of following parts by weight:

[0048] Mullite particles (AL 2 o 3 55~70%), 10,

[0049] Burnt gemstone particles (AL2O 350~60%), 30,

[0050] High alumina corundum particles (AL2O3 50-65%), 65,

[0051] The particle diameters of the above-mentioned particles are all 0-8mm,

[0052] Mullite fine powder (AL 2 o 3 55~70%), 5,

[0053] High alumina bauxite clinker fine powder (AL2O3 50-60%), 8,

[0054] Kyanite fine powder (AL 2 o 3 50~60%), 5,

[0055] The mesh numbers of the above fine powders are all 180 mesh,

[0056] Alumina powder (AL 2 o 3 ≥98%) 300 mesh, 8,

[0057] High alumina cement fine powder (AL 2 o 3 ≥70%) 200 mesh, 10,

[0058] Silica powder (SiO2≥90%) 300 mesh, 5,

[0059] High temperature heat-resistant steel fiber (length 5 ~ 50mm), 1.5,

[0060]Sodium tripolyphosphate, 0.2,

[0061] FDN, 0.15,

[0062] After mixing according to the weight parts, add it to the mixer and mix it with w...

Embodiment 3

[0063] Embodiment 3: choose the raw material component of following parts by weight:

[0064] Mullite particles (AL 2 o 3 55~70%), 25,

[0065] High alumina bauxite clinker particles (AL2O3 50-60%), 65,

[0066] Andalusite particles (AL 2 o 3 50~65%), 5,

[0067] The particle diameters of the above-mentioned particles are all 0-8mm,

[0068] Mullite fine powder (AL 2 o 3 55~70%), 7,

[0069] High alumina bauxite clinker fine powder (AL2O3 50-60%), 6,

[0070] Andalusite fine powder (AL 2 o 3 50~60%), 3,

[0071] The mesh numbers of the above fine powders are all 180 mesh,

[0072] Alumina fine powder (AL 2 o 3 ≥98%) 300 mesh, 8,

[0073] High alumina cement fine powder (AL 2 o 3 ≥70%) 200 mesh, 12,

[0074] Silica powder (SiO2≥90%) 300 mesh, 6,

[0075] High temperature heat-resistant steel fiber (length 5 ~ 50mm), 1.5,

[0076] Sodium tripolyphosphate, 0.2,

[0077] CMC, 0.1,

[0078] After mixing according to the weight parts, add it to the mixer a...

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Abstract

The invention provides a manufacturing method of a seal cover for an operation observation aperture on a carbon calciner fire wall. Raw materials consist of three parts of aggregate, matrix and additive. The aggregate comprises three or more components selected from: granular mullite, high aluminium corundum, bauxite chamotte, flint clay and andalusite; the matrix comprises fine-powdered mullite,bauxite chamotte, andalusite or kyanite or sillimanite, alumina, high-alumina cement, silicon micro powder and high temperature heat resistant steel fiber; the additive is a mixture comprising two ormore components selected from sodium tripolyphosphate, sodium hexametaphosphate, CMC, FDN and sodium lignosulfonate. The manufacturing method includes steps of: proportioning raw materials; mixing bya mixer; adding water with stirring; putting into a die; partitioning into blocks and moulding; carrying out natural maintenance; and drying at 110 DEG C-300 DEG C for 24-48h. The invention has beneficial effect that the seal cover produced by the method has excellent physical and chemical performance indexes, such as high high-temperature flexural strength, good thermal shock stability and refractoiness under load.

Description

technical field [0001] The invention relates to a method for manufacturing a sealing cover for an observation operation hole of a flue wall of a carbon roasting furnace, and belongs to the technical field of production of a carbon roasting furnace body material produced by anode carbon blocks for electrolytic aluminum. Background technique [0002] The carbon roasting furnace is mainly used to roast the carbon block to make it into the anode carbon block used in the electrolytic cell. Indirect heating to improve the mechanical strength, electrical conductivity and high temperature resistance of carbon products. The material box of the carbon roasting furnace is composed of a flue wall and a transverse wall. The top of the flue wall is composed of a plurality of refractory castable prefabricated blocks. Each castable prefabricated block has a central round hole. These holes are used for Flue gas emission, injection supply of combustion fuel, temperature and pressure measurem...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 靳艳军董建军
Owner 河南鑫诚耐火材料股份有限公司
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