CAJ | 학술논문

针对火法炼锌过程中产出的硬锌渣 ,研究了中性浸出锌—浓硫酸熟化水浸铟—碱浸锡 ,考察了物料粒度、液固体积质量比、体系酸度对锌、铟、锡浸出率的影响.结果表明 :在硬锌渣粒度小于200目、液固体积质量比4:1、反应终点p H为5 .0~5 .5、反应时间2 h、室温、中性浸出条件下 ,锌浸出率为93% ;在反应温度85℃ 、液固体积质量比8:1、体系酸度100 g/L、反应时间4 h条件下进行浓硫酸熟化浸出 ,铟浸出率达99 .7% ;在反应温度为室温、氢氧化钠浓度为2 mol/L、液固体积质量比3:1、反应时间2 h条件下进行碱浸 ,锡浸出率达97% .锌、铟、锡得到较好回收.
침대화법련자과정중산출적경자사 ,연구료중성침출자—농류산숙화수침인—감침석 ,고찰료물료립도、액고체적질량비、체계산도대자、인、석침출솔적영향.결과표명 :재경자사립도소우200목、액고체적질량비4:1、반응종점p H위5 .0~5 .5、반응시간2 h、실온、중성침출조건하 ,자침출솔위93% ;재반응온도85℃ 、액고체적질량비8:1、체계산도100 g/L、반응시간4 h조건하진행농류산숙화침출 ,인침출솔체99 .7% ;재반응온도위실온、경양화납농도위2 mol/L、액고체적질량비3:1、반응시간2 h조건하진행감침 ,석침출솔체97% .자、인、석득도교호회수.
The process of neutral leaching zinc-concentrated sulfuric acid curing and water leaching indium-alkali leaching tin from a hard zinc slag produced from zinc pyromentallurgy was researched . The effects of hard zinc slag particle size ,ratio of liquid volume-to-solid mass and system acidity on leaching rate of zinc ,indium and tin w ere examined .T he results show that under the conditions of hard zinc slag particle size below 200 mesh ,ratio of liquid volume-to-solid mass of 4:1 ,and reaction ending pH of 5 .0-5 .5 ,leaching rate of zinc is 93% after reacting for 2 h at room temperature by neutral leaching .When curing for 4 h using concentrated sulfuric acid at the conditions of ratio of liquid volume-to-solid mass of 8:1 ,system acidity of 100 g/L then leaching for 4 h using water ,the leaching rate of indium reaches 99 .7% .When alkali leaching for 2 h at room temperature and ratio of liquid volume-to-solid mass of 3:1 with NaOH solution of 2 mol/L ,the leaching rate of tin is about 97% . Zinc ,indium and tin in the hard-zinc slag can be recovered effectively .