摘要:
Method for removing essentially all of the chemically bonded arsenic and antimony from copper sulfide ores. The arsenic and antimony are selectively leached out using Na2S in a basic solution. The resulting Na3AsS4 and Na3SbS4 are converted to the sulfides or to ferric arsenate and ferric antimonate for safe disposal. Sodium and sulfur values are recovered for recycling in the process.
摘要翻译:从硫化铜矿石中去除基本上所有化学键合的砷和锑的方法。 使用Na 2 S在碱性溶液中选择性地浸出砷和锑。 将所得的Na 3 AsS 4和Na 3 SbS 4转化为硫化物,或转化成砷酸铁和锑酸铁以便安全处理。 在该过程中回收钠和硫的回收利用。
摘要:
Method and apparatus for converting an aluminum nitrate solution to Alpha -alumina for electrolytic reduction to aluminum. The solution is introduced into a fluidized bed under conditions which remove a substantial portion of the nitrate values as nitric acid vapor and form a solid product which is heated further to remove residual water and nitrate values and to convert the alumina to Alpha -alumina.