某选厂硫精矿提质降砷工艺试验研究

某选矿厂产出的硫精矿品位偏低, 且含砷较高(达到3.49%), 无法进行销售利用。为了实现资源的综合利用, 采用高梯度磁选机, 通过一粗一精磁选工艺对硫精矿进行处理, 硫精矿铁品位提高了9.25个百分点, 硫品位提高了4.63个百分点, 有害元素砷脱除率达到90.85%, 砷含量降到了0.46%。提质降砷后的硫精矿可以满足冶炼原料的要求, 实现了硫资源的综合利用, 也达到了一定的环境保护效果。

Flowsheet Optimization for Upgrading and Arsenic-Reducing of Sulfur Concentrate

Owing to its low sulfur grade and high arsenic content (up to 3.49%), the sulfur concentrate from an ore dressing plant cannot be sold out for utilization. For solving this problem, a high-gradient magnetic separator was used in the magnetic separation processes to treat this sulfur concentrate by adopting a flowsheet consisting of one stage of roughing and one stage of cleaning. After the optimization, the iron grade and sulfur grade of the sulfur concentrate can be increased by 9.25 percent points and 4.63 percent points respectively, and the arsenic content is decreased to 0.46% with the arsenic removal rate attaining 90.85%. This upgraded sulfur concentrate is qualified for smelting operation, thus this sulfur resource can be comprehensively utilized, which is beneficial to environmental protection.