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Method for preparing low-carbon refractory brick from needle coke

A needle coke and refractory brick technology is applied in the field of low carbon brick refractory materials, which can solve the problems of high manufacturing cost and low degree of mass industrial production, and achieve improved spalling resistance, excellent thermal shock performance, and high purity. Effect

Inactive Publication Date: 2015-03-25
LIAONING ZHONGMEI HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods have solved some problems, there are still certain difficulties in actual industrial production, such as high manufacturing cost and low degree of industrial production in large quantities.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The method of using needle coke to prepare low-carbon magnesia-carbon bricks: the specific ratio is 15 parts of fused magnesia with a particle size of 3-5mm, 24 parts of fused magnesia with a particle size of 1-3mm, and fused magnesia with a particle size of 0.1-1mm 35 parts, 15 parts of fused magnesia with a particle size of ≦74 μm, 3 parts of needle coke with a particle size of 1-20 μm, 0.5 parts of asphalt powder, 2 parts of graphite with a particle size of 100 mesh, 1.5 parts of metal silicon powder, 2.5 parts of metal aluminum powder, Add 3.0 parts of liquid phenolic resin binder, weigh according to the proportion, and produce according to the following production process.

[0031] The preparation process is as follows:

[0032] 1), preparing aggregate: 15 parts of fused magnesia with a particle size of 3-5 mm, 24 parts of fused magnesia with a particle size of 1-3 mm, and 35 parts of fused magnesia with a particle size of 0.1-1 mm;

[0033] 2) Preparation of p...

Embodiment 2

[0043] The method of using needle coke to prepare low-carbon aluminum-magnesium-carbon bricks: the specific ratio is 18 parts of brown corundum with a particle size of 3-5mm, 24 parts of brown corundum with a particle size of 1-3mm, and 27 parts of brown corundum with a particle size of 0.1-1mm. 12 parts of 0.1μm-74μm white corundum, 3 parts of needle coke with particle size of 1μm-20μm, 6 parts of fused magnesia ≤74μm, 1 part of asphalt powder, 2 parts of graphite with particle size of 100 mesh, 2 parts of silicon carbide powder, metal aluminum 2 parts of powder, plus 3.2 parts of liquid phenolic resin binder, after weighing according to the proportion, carry out the following production process according to the weight ratio.

[0044] The preparation process is as follows:

[0045] 1) Preparation of aggregate: 18 parts of brown corundum with a particle size of 3-5mm, 24 parts of brown corundum with a particle size of 1-3mm, and 27 parts of brown corundum with a particle size ...

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Abstract

The invention relates to a method for preparing a low-carbon refractory brick from needle coke. The method sequentially comprises the following steps: preparing aggregates; preparing premixed powder; and mixing, molding and drying, so as to produce the low-carbon refractory brick, wherein a material composition of a product is optimized by adding the needle coke in the mixing process; a mesh structure of carbon fibers can be formed in situ in a service environment; and the needle coke has the advantages of high mechanical strength, good oxidation resistance, low energy consumption and the like, and also has the characteristics of high purity, low electrical resistivity, low coefficient of thermal expansion, and high impact resistance of graphite. Due to these unique properties, the mean pore diameter is reduced, and the high-temperature strength is increased even if the amount of the graphite is greatly reduced, or even the graphite is not used; the heat conductivity is reduced; and meanwhile, the product is capable of achieving the same thermal shock resistance, slag resistance and penetration resistance as the traditional high-carbon magnesia carbon brick.

Description

technical field [0001] The invention relates to the technical field of low-carbon refractory bricks, in particular to a method for manufacturing low-carbon refractory bricks by using needle coke. Background technique [0002] In recent years, as the iron and steel industry is vigorously developing the refining process outside the furnace, the output of low carbon steel and ultra-low carbon steel is getting higher and higher. The progress of smelting technology has new requirements for refractories, and low-carbon magnesia-carbon refractories have become a new development hotspot for magnesia-carbon refractories. The process of producing clean steel requires strict control of the carbon content in refractory materials, reducing the carbon content of the carbon-containing lining to the steel, and requiring that the total carbon content of the carbon-containing lining should not exceed 8 parts, which can significantly reduce the thermal conductivity of the material and reduce ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 王树山金耀东王利付伟付宇付钢
Owner LIAONING ZHONGMEI HLDG
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