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Sodium Sulfide is the chemical compound with the formula Na2S, or more commonly its hydrate Na2S·9H2O. Both are colorless water-soluble salts that give strongly alkaline solutions.
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Sodium Sulfide is primarily used in pulp and paper industry in the kraft process and in leather treatment. It is used in water treatment as an oxygen scavenger agent and also as a metals precipitant, in chemical photography for toning black and white photographs.
During sintering (firing) at temperatures of 1750 – 2000 C° in shaft or rotary kilns naturally occurring magnesium carbonate is converted into sintered magnesia, directly (...
By fusing in an electric arc furnace, Fused Magnesia can be produced, which along with sintered magnesia is used for refractory bricks (e.g. to line steel furnaces or cemen...
Wollastonite is a naturally occurring, calcium silicate-based mineral that is present in the form of needle-like crystals or fibers. It is characterized by its high tempera...