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DOI:
有色金属工程:2018,8(5):-
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硫钴精矿直接还原试验研究
李俊翰,孙宁,杨绍利,马兰,冯锐
(攀枝花学院,攀枝花学院,攀枝花学院,攀枝花学院,攀枝花学院)
Direction Reduction of Sulfur-Cobalt Concentrate
LI Junhan,SUN Ning,YANG Shaoli,MA Lan and FENG Rui
(Panzhihua University,Panzhihua,Panzhihua University,Panzhihua,Panzhihua University,Panzhihua,Panzhihua University,Panzhihua,Panzhihua University,Panzhihua)
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投稿时间:2018-07-25    修订日期:2018-08-15
中文摘要: 以攀枝花硫钴精矿为原料,研究了氧化焙烧对脱硫效果的影响,并对硫钴精矿焙砂的物相组成进行了理论上的分析。分析表明:经氧化焙烧后,磁黄铁矿的衍射峰逐渐消失,黄铁矿衍射峰的相对强度明显降低,产生了赤铁矿的衍射峰,说明氧化焙烧能有效脱除硫钴精矿中硫化物矿物中的硫。在此基础之上,以煤粉作还原剂,聚乙烯醇为粘结剂,对焙砂进行了压力成型-直接还原试验,研究了还原温度、还原时间、矿煤质量比对焙砂含碳球团直接还原效果的影响。结果表明:当矿粉粒度-200目占75%,粘结剂加入量0.6%,成型压力为6MPa,水分含量12%,矿煤质量比100:15,还原温度1100℃,还原时间25min时,焙砂含碳球团的直接还原效果较好,金属化率达72.80%。
中文关键词: 硫钴精矿  氧化焙烧  球团  还原  金属化率
Abstract:Using the Panzhihua sulfur-cobalt concentrate as raw materials, the effect of oxidizing roasting on desulfurization was studied. The roasting ore phase was studied theoretically by means of XRD analysis. The results show that through the oxidative roasting, the characteristic peak of pyrrhotite gradually disappear and the characteristic peak of hematite can be observed, and also the relative intensity of the pyrite is significantly reduced. It was indicated that oxidative roasting can effectively remove sulfur from sulfide minerals in sulphur-cobalt concentrate. Based on those, the pulverized coal was used as the reducing agent and the polyvinyl alcohol as binding agent, the pressure molding-direct reduction experiment of roasting ore was carried out, and the influences of reduction temperature, reduction time and the mass ratio of ore to coal on metallization rate of the pellets were studied. The results show that the optimized technology parameters obtained are the sulfur cobalt concentrate contain minus 200 mesh 75%, the content of binding agent of 0.6%, the moulding pressure of 6MPa, the moisture of 12%, the mass ratio of ore to coal of 100:15, the reduction temperature of 1100℃ and the time of 25min. Under these conditions, the metallization rate of the pellets can be up to 72.80%.
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李俊翰,孙宁,杨绍利,马兰,冯锐.硫钴精矿直接还原试验研究[J].有色金属工程,2018,8(5):.

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