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时间:2020-04-12
《次氧化锌浸取净化新工艺-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第46卷第1期无机盐工业2014年01月IN0RGANICCHEMICALSINDUSTRY43次氧化锌浸取净化新工艺李晓乐。杨继朋,汤长青,许银霞,程光辉(济源职业技术学院.河南济源459000)摘要:研究了以炼铅厂含锌烟灰为原料,经盐酸浸取、高锰酸钾氧化、锌粉置换制备氯化锌溶液的工艺。以锌的浸出率最高,杂质铅的浸出率最低,铁、锰、铅、镉、铜脱除最彻底为目标,实验得出最佳的酸浸和净化条件:40g次氧化锌、71mL浓盐酸、130mL水在30℃下浸取50rain后,过滤,洗涤滤渣,滤液定容为250mL,取200mL滤液,滤液中加高锰酸钾0.0136g.10oC下氧化2h后过滤
2、,取200mL二次滤液向其中加锌粉0.12g,40℃下反应50min后过滤,得浓度为1.63mol/L的氯化锌溶液在上述工艺条件下,锌的浸出率为94.2%,氯化锌溶液中杂质离子含量满足HG/T2323-2012(32业氯化锌》中优等品的要求,可用来生产符合GB/T19589-2004(纳米氧化锌》规定的I类纳米氧化锌。关键词:次氧化锌;酸浸;氯化锌;氧化;置换中图分类号:T0132.41文献标识码:A文章编号:1006—4990(2014)O1—0043—03Newtechnologyforextractionandpurificationofsecondaryzincox
3、ideLiXiaole,YangJipeng,TangChangqing,XuYinxia,ChengGuanghui(JiyuanVocationalandTechnicalCollege,Jiyuan459000,China)Abstract:Anewtechnologyofpreparingzincchloridesolutionwithzinc—containingashfromlead—smeltingfactoryasrawmaterialwasstudied.Accordingtothetechnology,zincchloridesolutioncouldb
4、epreparedthroughhydrochloricacidleaching,potassiumpermanganateoxidation,andzincpowderreplacement.Togetthehighestleachingrateofzinc,thelowestleachingrateofimpurityPb,andthoroughlyremovingFe,Mn,Pb,Cd,andCuelements,theoptimumexperimentalacidleachingandpurificationconditionswereobtainedasfollo
5、ws:After40gsecondaryzincoxide,71mLconcentratedhydrochloricacid,and130mLwaterreactingtogetherfor50rainat30℃,filtrating,andwashingthefilterresidue.Thenthefihrationwasdilutedto250mLconstantvolume.Adding0.0136gKMnO4intothe200mLfiltration,andfiltratingafteroxidatingat10℃for2h.AddingZnpowder0.12
6、gintothe200mLsecondaryfiltration,filtratingafterreactingfor50minat40oCandthezincchloridesolutionwith1.63mol/Lwasobtained.Underaboveconditions.theleachingrateofzincwas94.2%.theimpurityioncontentinzincchloridesolutionmettherequirementsofhigh—classzincchlorideproductsofIndustrialZincChloride(
7、HG/T2323-2012)andcouldbeusedfortheproductionoflevel1nanometerzincoxidestipulatedinprovisionsofNanometerZincOxide(GB/T19589-2004).Keywords:secondaryzincoxide;acidleaching;zincchloride;oxidation;replacement次氧化锌是指含锌矿物冶炼过程中生成的氧化1实验部分锌含量较低、杂质含量较多的锌灰。其中氧化锌质量1.1原料及实验
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