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黄金科学技术 ›› 2017, Vol. 25 ›› Issue (6): 121-126.doi: 10.11872/j.issn.1005-2518.2017.06.121

• 冶炼技术与装备研发 • 上一篇    下一篇

生物提金氧化液中铁的选择性沉淀

段敏静1,梁长利2*,许宝泉2,陈陵康 2   

  1. 1.江西理工大学建筑与测绘学院,江西  赣州   341000;
    2.江西理工大学资源与环境工程学院,江西  赣州   341000
  • 收稿日期:2017-05-09 修回日期:2017-07-26 出版日期:2017-12-30 发布日期:2018-05-18
  • 通讯作者: 梁长利(1975-),男,陕西西安人,讲师,从事生物冶金和稀土绿色提取研究工作。lclwind@163.com
  • 作者简介:段敏静(1980-),女,陕西西安人,工程师,从事环境保护研究工作。lzl951179@163.com
  • 基金资助:

    江西省重点研发计划重点项目“高品质小球藻异养发酵—光激励诱导自养耦合养殖技术”(编号:20171ACF60011)和“螺旋藻中藻蓝蛋白产业化生产技术”(编号:20171ACF60008)联合资助

Selective Precipitation of Iron from Bio-oxidation Liquid of Gold Extraction

DUAN Minjing1,LIANG Changli2,XU Baoquan2,CHEN Lingkang2   

  1. 1.School of Architectural and Surveying & Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou    341000,Jiangxi,China;
    2.Faculty of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000    Jiangxi,China
  • Received:2017-05-09 Revised:2017-07-26 Online:2017-12-30 Published:2018-05-18

摘要:

以生物提金氧化液为研究对象,采用磷酸氢二铵((NH4)2HPO4)作为沉淀剂,研究了pH值、温度、加料方式、(NH4)2HPO4浓度和沉淀反应时间对生物提金氧化液中铁的选择性沉淀的影响。采用同时流加生物提金氧化液和0.2 g/mL(NH4)2HPO4溶液的方式,控制(NH4)2HPO4流速将沉淀体系的pH值调节为2.0,在60 ℃条件下搅拌反应2.5 h,铁沉淀率达到95.2%,砷存留率为93.6%,XRD图谱证实了铁沉淀主要是磷酸铁(FePO4)和三聚磷酸二氢铁(FeH2P3O10),实现了生物提金氧化液中铁的选择性沉淀,为从生物提金氧化液中综合回收铁、砷等有价成分提供了理论指导。

关键词: 生物提金氧化液, (NH4)2HPO4, FePO4, 选择性沉淀, 有价成分, 综合回收

Abstract:

The effect of pH value,temperature,diammonium hydrogen phosphate concentration,feeding ways and precipitate time on the selective precipitation of iron from bio-oxidation liquid of gold ore was studied,by taking bio-oxidation liquid of gold extraction as the research object and diammonium hydrogen phosphate as precipitant.The precipitation rate of iron reached 95.2% and the residual rate of arsenic in the bio-oxidation liquid was 93.6% under the conditions:flow the bio-oxidation liquid and 0.2 g/mL diammonium hydrogen phosphate at the same time,and adjust the pH value to 2.0 by adjust the flow rate of diammonium hydrogen phosphate,precipitate at 60 ℃ for 2.5 hours.XRD spectrum confirmed the precipitation of iron was mainly composed of ferric phosphate and ferrous dihydrogen phosphate.The results confirmed the selective precipitation of iron from bio-oxidation liquid,which can provide theoretic guidance to recovery valuable components such as iron and arsenic from bio-oxidation liquid.

Key words:  liquid of bio-oxidation of gold extraction, diammonium hydrogen phosphate, ferric phosphate, selective precipitation, valuable content, comprehensive recovery

中图分类号: 

  • TF831

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