材料研究与应用
材料研究與應用
재료연구여응용
MATERIALS RESEARCH AND APPLICATION
2014年
3期
203-207
,共5页
硒%铅锌混合矿%烧结烟尘
硒%鉛鋅混閤礦%燒結煙塵
서%연자혼합광%소결연진
selenium%lead-zinc mix concentration%sintering dust
采用一段酸浸分离回收锌镉、二段氧化酸性浸硒、SO2还原含硒溶液制取粗硒的工艺,用于处理铅锌混合矿烧结烟尘,提取其中所含的硒.结果表明:以稀硫酸浸出分离烟尘中的锌与镉,锌与镉的浸出率分别达98.5%与99.1%;以硝酸钠为氧化剂在硫酸体系浸取硒,在硫酸浓度为2.0 mol/L、搅拌速度为150 r/min、反应温度为80℃的条件下,硒的浸出率大于94%;采用SO2气体还原溶液中所含硒,在75℃下反应,控制还原时间100 min ,溶液中硒的还原率大于95%;在优化条件下,在对烧结烟尘的提硒过程中,硒的直接回收率为89.42%,所得粗硒含硒89.2%.
採用一段痠浸分離迴收鋅鎘、二段氧化痠性浸硒、SO2還原含硒溶液製取粗硒的工藝,用于處理鉛鋅混閤礦燒結煙塵,提取其中所含的硒.結果錶明:以稀硫痠浸齣分離煙塵中的鋅與鎘,鋅與鎘的浸齣率分彆達98.5%與99.1%;以硝痠鈉為氧化劑在硫痠體繫浸取硒,在硫痠濃度為2.0 mol/L、攪拌速度為150 r/min、反應溫度為80℃的條件下,硒的浸齣率大于94%;採用SO2氣體還原溶液中所含硒,在75℃下反應,控製還原時間100 min ,溶液中硒的還原率大于95%;在優化條件下,在對燒結煙塵的提硒過程中,硒的直接迴收率為89.42%,所得粗硒含硒89.2%.
채용일단산침분리회수자력、이단양화산성침서、SO2환원함서용액제취조서적공예,용우처리연자혼합광소결연진,제취기중소함적서.결과표명:이희류산침출분리연진중적자여력,자여력적침출솔분별체98.5%여99.1%;이초산납위양화제재류산체계침취서,재류산농도위2.0 mol/L、교반속도위150 r/min、반응온도위80℃적조건하,서적침출솔대우94%;채용SO2기체환원용액중소함서,재75℃하반응,공제환원시간100 min ,용액중서적환원솔대우95%;재우화조건하,재대소결연진적제서과정중,서적직접회수솔위89.42%,소득조서함서89.2%.
Crude selenium was prepared from sintering dust of lead-zinc mix concentration using two-step leaching technology and reduction-extraction selenium by sulfur dioxide gas .The results shows that ,in the process of separation zinc and cadmium from materials via dilute sulfuric acid leaching route w hen the condition of liquid-solid ratio and leaching time are controlled well ,the leaching rate of Zn and Cd can be a-chieved up to 98 .5% and 99 .1% ,respectively .In the process of oxidation-leaching of selenium w hile sodi-um nitrate as oxidant ,the leaching rate of Se is above 94% w hen the optimum operation parameters are de-termined as follow s :temperature of 80 ℃ ,stirring speed of 150 r/min and ratio of liquid to solid of 5︰1 , sulfuric acid concentration of 2 .0 mol/L .T he reduction rate of selenium reaches 95% under the reductive temperature is 80 ℃ and the reaction time is 100 min w hile sulfur dioxide gas as the reducing agent .In the w hole process under optimum conditions ,the recovery rate of selenium is above 89 .42% ,and the ultimate selenium content in the crude selenium is 89 .2%.