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DRY REACTION PROCESS OF ASBESTOS TAILINGS AND AMMONIUM SULFATE
DRY REACTION PROCESS OF ASBESTOS TAILINGS AND AMMONIUM SULFATE
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机译:石棉尾矿和硫酸铵的干法反应过程
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摘要
There is disclosed a dry process for preparing magnesium sulfate by heating one surface of a reaction mixture of asbestos tailings to a temperature of from 350 DEG to 400 DEG 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 condense in one of the last two zones which are at a temperature lower than 250 DEG 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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