黄金
黃金
황금
GOLD JOURNAL
2014年
6期
73-75
,共3页
赖子球%曾斌%余攀%蓝金莲
賴子毬%曾斌%餘攀%藍金蓮
뢰자구%증빈%여반%람금련
工业废渣%银%焙烧%工艺%浸出率
工業廢渣%銀%焙燒%工藝%浸齣率
공업폐사%은%배소%공예%침출솔
industrial residue%silver%roasting%process%extraction rate
采用焙烧-硫酸浸出-氰化浸出工艺,从某复杂工业废渣中提取银。通过试验考察了焙烧气氛、添加剂种类和加入量、焙烧温度、焙烧时间等预处理因素对银浸出率的影响。试验结果表明:优化焙烧预处理条件为富氧气氛、温度903 K、焙烧时间3 h、添加剂硫酸钠加入量3%;焙砂经酸浸-氰化浸出后,银的提取率为78.41%;废渣中银质量分数由原来的0.049%降低至0.0145%。
採用焙燒-硫痠浸齣-氰化浸齣工藝,從某複雜工業廢渣中提取銀。通過試驗攷察瞭焙燒氣氛、添加劑種類和加入量、焙燒溫度、焙燒時間等預處理因素對銀浸齣率的影響。試驗結果錶明:優化焙燒預處理條件為富氧氣氛、溫度903 K、焙燒時間3 h、添加劑硫痠鈉加入量3%;焙砂經痠浸-氰化浸齣後,銀的提取率為78.41%;廢渣中銀質量分數由原來的0.049%降低至0.0145%。
채용배소-류산침출-청화침출공예,종모복잡공업폐사중제취은。통과시험고찰료배소기분、첨가제충류화가입량、배소온도、배소시간등예처리인소대은침출솔적영향。시험결과표명:우화배소예처리조건위부양기분、온도903 K、배소시간3 h、첨가제류산납가입량3%;배사경산침-청화침출후,은적제취솔위78.41%;폐사중은질량분수유원래적0.049%강저지0.0145%。
Roasting-sulfuric acid leaching-cyanide leaching process is used to extract silver from complex industri-al residues.The effects of roasting atmosphere ,additives and their dosage ,roasting temperature and time have on ex-traction rate of silver were investigated by experiments .The results show that the optimal roasting conditions include rich oxygen ,3 %of sodium carbonate dosage ,903 K of roasting temperature ,and 3 h of roasting time .With the calci-ning leached by sulfuric acid and cyanide ,the extraction rate of silver was 78.41%,and then the content of silver in residues can be reduced from 0.049 %to 0.014 5 %.