基于磨矿技术效率锡石多金属硫化矿磨矿优化研究

在锡石多金属硫化矿磨矿实践中,存在锡石过磨和硫化矿欠磨的问题。为缓解锡石过磨和硫化矿欠磨矛盾,实现磨矿优化,采用单因素试验与响应曲面法试验方法,提出合格粒级指数表征方法,研究了入磨粒度、磨矿时间、磨矿浓度对锡石多金属硫化矿磨矿技术效率与合格粒级指数的影响,结果表明:单因素分析时,与-3 mm入磨粒度相比,-2 mm入磨粒度的磨矿产物能够得到较高的锡石磨矿技术效率和硫化矿磨矿技术效率,且锡、锌、铅、铁四种金属的合格粒级指数较高;磨矿时间为8 min时,磨矿产物的磨矿技术效率最高,且锡金属合格粒级指数最高;磨矿浓度为75%时,锡金属合格粒级指数最高。响应曲面法分析时,入磨粒度为-2 mm,磨矿时间为8 min,磨矿浓度为75%时,锡金属合格粒级指数最高。

Study on cassiterite polymetallic sulfide ore grinding optimization based on the grinding technical efficiency

There are still some problems about cassiterite overgrinding and sulfide ore undergrinding in grinding practice of cassiterite polymetallic sulfide ore. In order to alleviate the contradiction and realize grinding optimization, this paper used the single factor test and response surface method test method and put forword the index of qualified particle characterization methods, studied the effects of feed size and grinding time, grinding density on cassiterite polymetallic sulfide ore grinding technical efficiency and index of qualified particle. The results show that compared with -3mm feed size, single factor analysis, the grinding product size of -2mm feed size can get higher grinding technical efficiency of cassiterite and sulfide ore grinding and higher index of qualified particle of tin, zinc, lead, iron four metal grinding; as grinding time is 8min, it can get the highest grinding technical efficiency of cassiterite and sulfide ore efficiency and tin index of qualified particle is the highest; as the grinding concentration is 75%, tin index of qualified particle is the highest. When the response surface method analysis, the grinding feed size is -2mm, the grinding time is 8min, the grinding concentration is 75%, the index of qualified particle of tin metal is the highest.