Study on sulphidization roasting and flotation of cervantite

A new technology, sulphidization roasting of antimony mineral cervantite with elemental sulfur followed by froth flotation is reported in this paper. The effects of roasting temperature and time, sulfur to antimony molar ratio on the properties of treated product and its flotation behavior were studied. Optimum roasting conditions are: roasting temperature 723 K; roasting time 30 min; and sulfur to antimony molar ratio of 1.5. Under these conditions, the mineral phase changed from cervantite to stibnite as expected. The flotation recovery of the sulphidized cervantite is over 90%. A flotation concentrate grading 21.04% Sb with a recovery of 77.15% is achieved by sulphidization roasting and flotation from a feed grading 1.11% Sb in which cervantite is the main antimony mineral.     

富氧熔炼高铜炉渣的贫化研究

在１２５０℃，选用碳质还原剂、硫铁矿和ＳｉＯ＿２对高铜炉渣进行电炉火法贫化。贫化过程分静态法和动态法（用氮气搅拌）。通过实验得到渣含铜与还原剂民ＦｅＳ、ＳｉＯ＿２加入量、冰铜品位和贫化时间的关系。通过电子探针显微分析确定贫化渣中主要铜相为冰铜相。     

丽江某难处理铜尾矿硫化浮选铜的试验研究

摘要:丽江某难处理氧化铜矿尾矿品位为0.58%,原矿中铜矿物种类多,矿石可浮性差异大,氧化率高,钙镁等碱性脉石含量较高,矿泥含量较高,属于泥质铜矿。大量矿泥的存在不仅消耗大量药剂,增加了操作控制难度,导致铜精矿品位和回收率低。因此,在原矿性质研究基础之上,试验采用两次粗选、两次扫选、一次精选的工艺流程,通过添加高效活化剂HS,有效地活化了目的矿物的上浮,最终获得了铜品位15.36%,铜回收率为83.80%的铜精矿,试验指标良好。      

高铁泥化钼铅矿浮选新工艺试验研究

针对贵州某地高铁泥化钼铅矿的特点,采用硫化-黄药浮选方法进行了钼铅矿的浮选回收试验。试验研究结果表明采用硫化法能够有效实现钼铅矿的浮选,六偏磷酸钠的添加能够改善矿浆的分散性能,钼铅矿捕收剂以异戊基黄药效果最好,添加煤油能够增强钼铅矿表面的疏水性,加温浮选能够明显改善硫化效果和浮选指标。采用该浮选工艺成功进行了工业试验,在给矿钼品位为0.67%条件,浮选精矿钼品位可以达到5.8%,回收率达到76%。     

Evaluation of the response of valuable and gangue minerals on a recovery,size and liberation basis for a low-grade silver ore

Mineralogical characterisation is typically used to assist in the development of processing strategies for ores. This paper describes the application of mineralogical characterisation techniques in the development of flotation strategies for processing an ore from a low-grade silver deposit that contains a variety of rock types that have undergone hydrothermal alteration where zinc, lead and silver sulphides are typically the primary minerals of economic interest. Comprehensive mineralogical characterisation of the feed, concentrates and tailings from batch flotation tests was undertaken using both the mineral liberation analyser (MLA) and laser ablation inductively-coupled plasma mass spectroscopy (LA-ICP-MS). The results of mineralogical characterisation of the feed (head grade, 116 ppm) indicated that the majority of the silver occurred as solid solution in pyrite which assisted in the development of the flotation strategy used for this ore which resulted in approximately 87% of the total silver being recovered to rougher concentrate at a grade of 485 ppm.