浇注料配比及浸染(国外英文资料).docVIP

浇注料配比及作用(国外英文资料) With high bauxite aggregate 65-70%, 7-10% alumina cement, silica fume and alumina powder, 5-8% bauxite powder 15-24%, water reducing agent 0.2%, according to the construction need to add some retarder or coagulant. Bauxite aluminiferouse mineral (bauxite) is one of the most important, the main ingredients for Al (OH) 3, gamma AlO (OH) and alpha AlO (OH), and goethite, hematite, kaolinite and small amounts of anatase TiO2, is the main raw material for extracting aluminium. Natural bauxite density 3.9 ~ 4g/cm3, hardness 1-3, opaque, not suitable for mortar or concrete. However, the sintered alumina is much stronger and harder than most natural rocks, so it is commonly used in ultra-high and high abrasion mortar or concrete. bauxite refers to the sintered bauxite aggregate, which is a kind of ceramic high and high hardness artificial aggregate. The properties of refractory cement and its chemical composition are introduced Refractory cement refers to the cement of calcium aluminate as the main constituent. Refractory cement is an amorphous refractories, especially the basic combination of refractory material. Its chemical composition is mainly Al2O3 and CaO, and some contain quite a lot of Fe2O3 and SiO2. Mineral composition has the following five kinds of minerals: calcium aluminate a CaO, Al2O3, 2 calcium aluminate (CA) CaO · 2 Al2O3 (CA2), seven calcium aluminate twelve 12 CaO · 7 Al2O3 (C12A7) contains three kinds of compounds, and inclusion of calcium feldspar, CaO SiO2, Al2O3, 2 (C2AS), iron, calcium aluminate four 4 CaO, Al2O3, Fe2O3 (C4AF), etc. They are usually grouped according to their chemical composition The nature of refractory cement depends mainly on its mineral composition. Refractory cement the main mineral composition of a calcium aluminate (CA) has the very high hydraulic activity of condensation, though not very fast but fast hardening (hardening time less than a day), is the strength of the alumina cement especially the main sour