引自：（1）彭会清 （2）李禄宏 徐 林 （（1）武汉理工大学； （2）江西理工大学） Test Research on Desulphurization of An Iron Concentrate by Flotation（1）Peng Huiqing（2）Li Luhong Xu Lin（1、Wuhan University of Technology;2、Jiangxi University of Science and Technology） Abstract：A concentrator produced an iron concentrate that had a content of sulfur of over 0.3% and the concentrator asked to reduce the sulfur content to below 0.1%.For this, in view of the characteristics of the sulfide in the concentrate including its occurrence mainly as pyrrhotite, its intergrowth with iron mineral and its high oxidation degree, regrinding, addition of high efficiency activator and application of composite collector were used. As a result , the sulfide in this iron concentrate was successfully removed, making the iron grade of the final concentrate as high as 67.64% and reducing its sulfur content to 0.078%. Keywords：Iron concentrate, Desulphurization by flotation, Regrinding, Activator, Composite collector 摘要：某铁矿选矿厂所产铁精矿含硫超过0.3%，而现场为了今后发展的需要，要求将含硫量降到0.1%以下。为此，针对该铁精矿中硫化物主要以磁黄铁矿形式存在、硫化物多与铁矿物连生且氧化程度较高的特点，通过再磨以及添加高效活化剂、采用复合捕收剂等手段，成功地用浮选方法脱除了原铁精矿中的硫化物，使铁精矿铁品位达67.64%，硫含量降至0.078%。 铁精矿中含硫高，将直接影响炼铁、炼钢的质量，对高炉生产也有危害。某铁矿选矿厂处理的铁矿石原矿含铁41. 55%，含硫1. 59%。由于脱硫不彻底，所产铁精矿含硫量超过0.3%，而现场为了今后发展的需要，要求将铁精矿含硫降到0.1%以下，这是磁选方法难以达到的。为此，本试验以该选矿厂生产的含硫超标的铁精矿为研究对象，用浮选法对铁精矿进行降硫。 1 原铁精矿性质 本次试验矿样为某铁矿选矿厂提供的铁精矿，含铁品位64.94%，含硫品位0.33%。铁精矿多元素分析见表1，粒度组成见表2。[next] 表1 原铁精矿多元素分析结果 （%）