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Microsilica, 45 µm, arises from the production of silicon or ferrosilicon metal.
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Microsilica, also known as silica fume, is used as an additive in concrete to improve its strength and durability. It is also used in the manufacture of refractory materials and in some metallurgical applications.
During sintering (firing) at temperatures of 1750 – 2000 C° in shaft or rotary kilns naturally occurring magnesium carbonate is converted into sintered magnesia, directly (...
Fluorspar, also known as fluorite or calcium fluoride (CaF2), is the calcium salt of hydrofluoric acid and a very widespread mineral that occurs primarily in granites and o...