Microsilica is also called silica fume or agglomerated silica fume. The fused magnesia brick is a ferroalloy in the process of smelting ferrosilicon and industrial silicon (metal silicon). A large amount of highly volatile SiO2 and Si gas is produced in the ore furnace, and the gas is quickly oxidized and condensed and precipitated after being discharged. It is a by-product of large-scale industrial smelting. The whole process needs to be recycled with dust-removing environmental protection equipment. Because of its lighter quality, it needs to be encrypted with encryption equipment. One scope of application:

　Commodity 砼, high strength 砼, self-leveling 砼, unshaped refractory, dry mixed (premixed) mortar, high strength non-shrinkage grout, wear-resistant industrial floor, repair mortar, polymer mortar, thermal insulation mortar, impermeability , 砼 compacting agent, bismuth preservative, cement-based polymer waterproofing agent; rubber, plastic, unsaturated polyester, paint, coating and other polymer materials, ceramics modification. 2. Application fields: 1. Used in mortar and mortar: high-rise buildings, seaports, reservoir dams, water conservancy, culverts, railways, highways, bridges, subways, tunnels, airport runways, sloping roads, and bolting and blasting reinforcement in coal mine roadways . 2. In the material industry: (1) High-grade high-performance low-cement refractory castables and prefabricated parts, the service life is three times that of ordinary castables, the refractoriness is improved by about 100 °C, and the high temperature strength and thermal shock resistance are obviously improved. It has been widely used in: coke oven, iron making, steel making, steel rolling, non-ferrous metals, glass, ceramics and power generation. (2) Large iron trenches and steel-clad materials, permeable bricks, smear repair materials, etc. (3) Self-flowing refractory casting materials and dry-wet spray application. (4) Oxide-bonded silicon carbide products (ceramic kiln furniture, flame barriers, etc.). (5) High temperature type calcium silicate lightweight insulation material. (6) The electric porcelain kiln is driven by corundum mullite. (7) High temperature wear resistant materials and products. (8) Corundum and ceramic products. (9) Sailong combined products. At present, in addition to being commonly used in cast refractories, a large number of applications are also found in fused and sintered refractories. 3. New wall materials and facing materials: (1) Polymer mortar, thermal insulation mortar and interface agent for wall insulation. (2) Cement-based polymer waterproof material. (3) Lightweight aggregate insulation and energy saving products and products. (4) The inner and outer wall construction is processed with putty powder. 4, other uses: (1) silicate brick raw materials. (2) Production of water glass. (3) Used as a reinforcing material for organic compounds. Because its composition is similar to that produced by gas phase method. It can be used as a filler reinforcing material in polymer materials such as rubber, resin, paint, paint, and unsaturated polyester.