雨中漫步2916
幼苗
共回答了23个问题采纳率:95.7% 举报
Research shows that,when the conditions were:90 ℃ extraction temperature,NaCl dosage is 120 g/l,100 g/l,acid concentration of NaClO3 was 30 g/l,reaction time 5h,precipitation of bismuth terminal pH 1.5,temperature 60 ℃,time 1H,alkali leaching transformation NaOH concentration is 40g/l,bismuth,tellurium in silver zinc,gold and silver can be realized effective separation and recovery
1年前
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