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

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...

AI Technical Summary

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 carbon brick added with silicon carbide-metal silicon composite powder, which introduces that adding silicon carbide-silicon composite powder to partially replace silicon carbide can reduce the aluminum silicon carbide carbon brick. The production cost, but because the silicon carbide-silicon composite powder contains Fe impurities, it is not good for the material performance

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