마그네시아 알루미나 스피넬

마그네시아-알루미나 스피넬(마그네시아 알루미나 스피넬) refers to the artificially synthesized spinel refractory raw material using magnesium oxide and aluminum oxide as raw materials. The raw material is rarely found in nature, and the industrial magnesia-aluminum spinel is all artificially synthesized. Bauxite-based sintered magnesia-aluminum spinel is made of high-quality bauxite with an Al2O3 content of more than 76% and high-quality light-burned magnesia powder with a MgO content of more than 95%. Sintered at the above high temperature.

소개

보크사이트 기반 소결 마그네시아-알루미늄 스피넬은 Al2O3 함량이 76% 이상인 고품질 보크사이트와 MgO 함량이 95% 이상인 고품질 광소성 마그네시아 분말로 만들어집니다. 상기 고온 소결 [1].

The characteristics of aluminum-magnesium spinel

Bauxite-based sintered magnesia-aluminum spinel is made of high-quality bauxite with an Al2O3 content of more than 76% and high-quality light-burned magnesia powder with a MgO content of more than 95%. It is sintered at high temperature, with high bulk density, high mineral phase content, well-developed crystal grains, uniform structure and stable quality. Magnesium-aluminum spinel has good corrosion resistance, strong corrosion and spalling ability, good slag resistance, abrasion resistance, thermal shock stability, high temperature resistance and other performance characteristics. It is an ideal raw material for the production of refractory products such as magnesia-aluminum spinel bricks for high-temperature zones of cement rotary kilns, ladle lining bricks, and ladle castables. Magnesium-aluminum spinel is widely used in refractory materials, steel smelting, cement rotary kilns and glass industrial kilns[2].

Application of Al-Mg Spinel

내식성, 내마모성 및 열충격 안정성이 우수합니다. 주요 용도: 첫째, 마그네시아 크롬 모래를 대체하여 시멘트 회전 가마용 마그네시아-알루미늄 스피넬 벽돌을 만드는 것입니다. 둘째, 국자 캐스터블을 만드는 데 사용되어 강판 라이닝의 내식성을 크게 향상시킵니다. 제강용 내화물에 널리 사용됩니다. 고품질의 합성 전 스피넬의 생산은 비정형 및 정형 고순도 내화물 생산을 위한 새로운 원료를 제공합니다[2].

해결을 해결하다

There are two kinds of electric melting method and sintering method. The electrofusion synthesis method uses industrial alumina or high-purity bauxite and light-burned magnesia (containing natural or sea (brine) water-borne magnesium) in proportion, and is melted at a high temperature of about 2200 ℃ in an electric arc furnace. The sintering method is to use the above-mentioned raw material ratio, after grinding, mixing, balling, and calcining in a rotary kiln or shaft kiln at a high temperature above 1800℃. In some bricks, industrial alumina or high After the purity bauxite clinker is ground, it is added or jointly ground, mixed, and shaped according to the ingredients requirements, and then fired at a high temperature to produce magnesia-aluminum spinel bricks, which are mostly used in open-hearth furnace tops and other parts.