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  • CN 62-1112/TF 
  • ISSN 1005-2518 
  • 创刊于1988年
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冶炼技术与装备研发

某金矿石的改性石硫合剂法浸金研究

  • 冯杰 ,
  • 傅平丰 ,
  • 杨天
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  • 北京科技大学土木与环境工程学院,北京   100083
冯杰(1990-),男,河北邯郸人,硕士研究生,从事贵金属提取及工业固体废物利用研究工作。519403966@qq.com

收稿日期: 2015-12-01

  修回日期: 2015-12-30

  网络出版日期: 2016-04-05

Study on Gold Leaching from Ores with Modified Lime-Sulpher- Synthetic-Solution Process

  • FENG Jie ,
  • FU Pingfeng ,
  • YANG Tian
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  • School of Civil and Environmental Engineering, University of Science and Technology Beijing,Beijing    100083,China

Received date: 2015-12-01

  Revised date: 2015-12-30

  Online published: 2016-04-05

摘要

某金矿石中矿物可磨性差异大,部分矿物细磨易泥化,矿石中的斜方钙沸石吸附性强,氰化金浸出率低。对该金矿采用改性石硫合剂法搅拌浸金研究,考察了磨矿细度、矿浆pH值、改性石硫合剂用量、浸出时间、氧化剂种类和用量对金浸出的影响。当矿浆液固比为2∶1、磨矿细度为 -45 μm占55%、矿浆pH值为11.0、浸出时间为6 h、改性石硫合剂用量为8 kg/t及H2O2投加量为3.33 kg/t时,金的浸出率为89.81%,比氰化浸出提高了16.35%。H2O2释放的溶解氧能促进石硫合剂中有效浸金成分与金的反应,H2O2还能氧化载金黄铁矿,促进金的浸出。

本文引用格式

冯杰 , 傅平丰 , 杨天 . 某金矿石的改性石硫合剂法浸金研究[J]. 黄金科学技术, 2016 , 24(1) : 102 -107 . DOI: 10.11872/j.issn.1005-2518.2016.01.102

Abstract

The minerals in a native gold ore had great differences in the grindability property. Lots of fine muds were generated in the grinding process.The gismondite with the high adsorption of gold ions was presented in the ore.Thus the leaching ratio of gold for the gold ore was relatively low by traditional cyaniding method. In this paper,the agitated leaching of the gold ore was studied with Modified Lime-Sulpher-Synthetic-Solution(MLSSS) process.The leaching effects of grinding particle size,slurry pH,added amount of MLSSS reagent,leaching time,oxidant species and their added amount were discussed.The optimum leaching conditions were as follows: weight ratio of liquid to solid was 2.0,55% grinding ore was less than 45 μm,slurry pH was 11.0,leaching time was 6.0 h,added MLSSS reagent was 8 kg/t(ore) and H2O2 amount was 3.33 kg/t(ore),respectively.The gold leaching ratio of 89.81% was achieved.By comparing to the cyaniding method,the gold leaching ratio increased by 16.35% with the MLSSS process.The dissolved oxygen generated from H2O2 could promote the reactions of gold with active ingredients in the MLSSS reagent.Additionally,the H2O2 could directly oxidize gold containing pyrites,which enhanced the gold dissolving reactions.

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