Dry reaction process of asbestos tailings and ammonium sulfate

Details Dry reaction process of asbestos tailings and ammonium sulfate Dry reaction process of asbestos tailings and ammonium sulfate

C - Chemistry, Metallurgy

01

F

23/102

C01F 5/40 (2006.01)

Patent

CA 1115486

A B S T R A C T There is disclosed a dry process for preparing magnesium sulfate by heating only one surface of a reaction mixture of asbestos tailings to a temperature of from 350 to 400°C whereby there is provided a gradient temperature between the heated zone, an intermediate zone and the outside zone where the ammonium bisulfate formed can be condensed in one of the last two zones which are at a temperature lower than 250°C and react with ammonia to provide a new supply of ammonium sulfate for further reaction with the asbestos tailings and recovering the magnesium sulfate thus obtained.

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