Aluminum-carbon carborundum brick for torpedo ladle and preparation method thereof

A technology of aluminum carbon silicon carbide bricks and torpedo tanks, which is applied in the field of shaped refractory materials, can solve the problems of high production cost of aluminum silicon carbide carbon bricks, reduce the high temperature strength of materials, and unfavorable material properties, so as to improve oxidation resistance and thermal shock Stability, reduction of porosity, improvement of erosion resistance and erosion resistance

Inactive Publication Date: 2016-01-27
WUGANG REFRACTORY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high price of silicon carbide raw materials (about 7,000 yuan/ton), the production cost of aluminum silicon carbide carbon bricks is also high; on the other hand, too much silicon carbide content will reduce the high temperature strength of the material
The Chinese invention patent with the publication number CN102757245A discloses an aluminum silicon carbide

Method used

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  • Aluminum-carbon carborundum brick for torpedo ladle and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Aluminum carbon silicon carbide bricks for torpedo tanks 1 (Al 2 o 3 -C-SiC brick) raw materials by weight ratio by 71 parts of high alumina bauxite clinker particles, 10 parts of alumina powder, 3 parts of silicon carbide micropowder, 2 parts of industrial crystalline silicon, 10 parts of Composed of flake graphite and 4 parts of thermosetting phenolic resin.

[0030] The high alumina bauxite clinker particles are divided into three gradations according to the particle size: ≤5mm and >3mm, ≤3mm and >1mm, and ≤1mm and >0.088mm, and the weight percentages are 45%, 37% and 18% respectively .

[0031] In high alumina bauxite clinker particles, Al 2 o 3 The content of ≥88%, Fe 2 o 3 content≤2.0%, TiO 2 The content of ≤4.0%, K 2 O+Na 2 O content≤0.4%, CaO+MgO content≤0.4%.

[0032] The particle size of high alumina bauxite powder is ≤0.088mm.

[0033] The particle size of silicon carbide micropowder is ≤3μm, the content of SiC is ≥96%, Fe 2 o 3 The content of ≤1...

Embodiment 2

[0037] Aluminum carbon silicon carbide bricks for torpedo tanks 2 (Al 2 o 3 -C-SiC brick) raw materials by weight ratio by 64 parts of high alumina bauxite clinker particles, 12 parts of alumina powder, 6 parts of silicon carbide micropowder, 3 parts of crystalline silicon, 12 parts of scale Composed of graphite and 3 parts of thermosetting phenolic resin.

[0038] High alumina bauxite clinker particles are divided into three gradations of ≤5mm and >3mm, ≤3mm and >1mm, and ≤1mm and >0.088mm according to the particle size, and the weight percentages are 48%, 28% and 24% respectively .

[0039] Above-mentioned raw material is identical with the raw material of embodiment 1.

Embodiment 3

[0041] Aluminum carbon silicon carbide bricks for torpedo tanks 3 (Al 2 o 3 -C-SiC brick) raw materials by weight ratio by 65 parts of high alumina bauxite clinker particles, 14 parts of high alumina bauxite powder, 4 parts of silicon carbide micropowder, 4 parts of crystalline silicon, 10 parts Composed of flake graphite and 3 parts of thermosetting phenolic resin.

[0042] High alumina bauxite clinker particles are divided into three gradations according to particle size: ≤5mm and >3mm, ≤3mm and >1mm, and ≤1mm and >0.088mm, and the weight percentages are 50%, 30% and 20% respectively .

[0043] Above-mentioned raw material is identical with the raw material of embodiment 1.

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Abstract

The invention discloses an aluminum-carbon carborundum brick for a torpedo ladle and a preparation method thereof. The aluminum-carbon carborundum brick for the torpedo ladle is prepared from, by weight, 62-74 parts of high-alumina bauxite clinker particles, 10-15 parts of high-alumina bauxite powder, 3-6 parts of silicon carbide micro powder, 2-5 parts of crystalline silicon, 10-15 parts of flake graphite and 3-5 parts of thermosetting phenolic resin. According to the method, firstly, the silicon carbide micro powder and the high-alumina bauxite powder are premixed; secondly, other raw materials are sequentially placed into a mixing mill to be mixed and ground, placed in a brick press for molding and heated at the temperature between 150 DEG C and 250 DEG C for 12-36h; finally, sorting, inspection, packaging and warehousing are conducted to obtain the aluminum-carbon carborundum brick for the torpedo ladle. The aluminum-carbon carborundum brick for the torpedo ladle has the advantages of low production cost, good oxidation resistance, good thermal shock resistance, good corrosion resistance performance, long service life and the like, thus can meet the market demand.

Description

technical field [0001] The invention relates to the field of shaped refractories, in particular to an aluminum carbon silicon carbide brick (Al 2 o 3 -C-SiC brick) and its preparation method. Background technique [0002] The torpedo tank is a kind of equipment for transporting and storing molten iron from the blast furnace to the converter with a large tonnage. It can also be used as a container for the pretreatment of molten iron and is an important equipment for realizing the "three removals" of molten iron. [0003] At present, the working lining of torpedo tanks is mostly made of aluminum silicon carbide carbon bricks (Al 2 o 3 -SiC-C bricks). As an important raw material component, silicon carbide has a high content in aluminum silicon carbide carbon bricks, and is generally added in the form of fine powder (180 mesh to 250 mesh) or particles (1 to 0mm) to improve the oxidation resistance of the material , high temperature properties such as corrosion resistance a...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 蔡长秀田先明雷中兴徐志华
Owner WUGANG REFRACTORY CO LTD
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