新闻动态News center

How to classify common refractory materials

发布日期:2020-03-02 16:18:10 访问量:182

Refractory brick material refers to the natural or artificial combined mineral or mineral used to make refractory materials with a fire resistance of more than 1580 ℃. Common refractory materials mainly include: siliceous materials, waxy stone materials, clay materials, high aluminum materials, dolomite materials, magnesia materials and other materials.

Siliceous material: siliceous refractory mineral material is mainly silica. Silica is not a mineral title but an industrial term, which refers to the massive siliceous material as silica. Its main mineral is divided into crystal stone and its main chemical composition is SiO2. Silica can be classified according to its structure density level, crystal transformation rate and heating expansion level. Generally speaking, crystalline silica is relatively pure and dense, which can be used to make bricks and prepare silica refractory concrete. Cemented silica is easy to be loose and seldom used after burning due to its many impurities.

Pyrophyllite material: Generally speaking, pyrophyllite refers to the pyrophyllite ore with sliding feeling, so it is also called pyrophyllite. Most of the waxes used in the industry are therefore pyrophyllite, and dense massive ore coexisting with kaolinite, diaspore, crystal, chalcedony, mica and other minerals. Natural wax stone can be used to produce semi silica refractory products.

Clay material: clay is not a pure mineral, but an assimilate of a variety of hydrous aluminosilicate minerals with a diameter less than 0.001M m (or less than 1-2 μ m). It is characterized by plasticity in wet state and fine powder state (assimilation after destroying and adding water), hardening after drying and vitrification under sufficient high temperature. According to its growth condition, clay can be divided into primary clay, secondary clay and left clay, which can also be divided into soft clay and hard clay. It can be divided into kaolin, kaolinite clay and kaolinite clay rock according to sedimentary types.

High alumina material: the material used to produce high alumina products can be divided into aluminosilicate minerals, such as sillimanite, kyanite and andalusite, and mullite. Hydrous alumina minerals are bauxite, such as diaspore, boehmite and gibbsite. Anhydrous alumina materials, such as natural corundum, industrial alumina, fused corundum, etc. According to the main mineral composition, the bauxite can be divided into: (1) diaspore - high alumina (D-K) type, (2) diaspore - pyrophyllite (D-P) type, (3) boehmite - kaolinite (B-K) type, (4) diaspore - ilite (D-I) type, and (5) diaspore - Kaolinite - rutile (d-k-r) type. Rongsheng refractory produces and sells various types of refractory materials.

Magnesia material and others: the primary material magnesia for producing magnesia refractories refers to sintered magnesia with necessary particles. It is formed by the fracture of sintered magnesite. Sintered magnesite can be obtained by calcining magnesite. In addition, sintered magnesite can be extracted from Canghai, salt lake brine, dolomite, serpentine and brucite. However, at present, China's Sintered magnesite is still obtained by calcining natural magnesite, and the project of extracting magnesium from Salt Lake is under construction.

Olivine mineral consists of a mineral with the same texture and composition, which belongs to orthorhombic system. The most common minerals in nature are forsterite and forsterite. However, only pure peridotite or serpentine peridotite with less iron can be used as refractory materials.

  • 上一篇:Refractory castables are a large group of different materials
  • 下一篇:已经没有了