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金属矿山 ›› 2015, Vol. 44 ›› Issue (02): 77-81.

• 矿物工程 • 上一篇    下一篇

分散剂及工艺优化对吉林某低品位硅藻土提纯的影响

高莹,韩跃新,陈晓龙,唐志东   

  1. 东北大学资源与土木工程学院,辽宁 沈阳 110819
  • 出版日期:2015-02-15 发布日期:2015-07-29
  • 基金资助:

    基金项目 国家高技术研究发展计划(863计划)项目(编号:2012AA030314),辽宁省高等学校创新团队项目(编号:LT2012007)。

Effects of Dispersants and Process Optimization on Purification of a Low-grade Diatomite in Jilin

Gao Ying,Han Yuexin,Chen Xiaolong,Tang Zhidong   

  1. School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China
  • Online:2015-02-15 Published:2015-07-29

摘要: 吉林临江低品位硅藻土属高烧失三级硅藻土,脉石矿物主要为石英和钠长石。为提高该硅藻土纯度,对其进行了浮选分散剂选择试验,并对最佳浮选条件下所得浮选精矿进行了焙烧—酸浸试验。结果表明,在矿浆温度为40 ℃、pH为9、十二胺为捕收剂条件下浮选,三聚磷酸钠作为分散剂时浮选指标最佳。以三聚磷酸钠作为分散剂、十二胺为捕收剂,经1粗2精浮选获得了SiO2品位为79.38%、Al2O3品位为5.04%的硅藻土浮选精矿。该浮选精矿在600 ℃条件下焙烧1 h后,在室温条件下采用20%的硫酸浸出1.5 h,获得了SiO2品位为89.57%、Al2O3品位为4.77%、Fe2O3品位为0.71%的硅藻土精矿,达到了一级土的标准。

关键词: 硅藻土, 分散剂, 三聚磷酸钠, 焙烧, 酸浸

Abstract: The low-grade diatomite of Linjiang County,Jilin Province,is grade-three diatomite with high burning loss,and gangue minerals are mainly quartz and albite.Dispersant selection tests ate carried out in order to purification the diatomite,as well as roasting-acid leaching tests on the flotation concentrate.The results showed that the flotation index is optimum when using sodium tripolyphosphate(STPP) as dispersant under pH 9,slurry is 40 ℃ and lurylamine as collector.By STPP as dispersant solvent,through one roughing and two cleaning flotation operation,concentrate with 79.38% SiO2,5.04%Al2O3 is obtained.And the concentrate of flotation was roasted for 1 h at temperature of 600 ℃,and leaching for 1.5 h using 20% sulfuric acid as solvent.Finally,diatomaceous concentrate with 89.57% SiO2,4.77% Al2O3,0.71% Fe2O3 is obtained,which can meets the standard of top-grade diatomite.

Key words: Diatomite, Dispersant, Sodium tripolyphosphate, Roast, Acid leaching