硫铁矿烧渣资源化开发与利用研究

【作者】 李华伟；

【导师】 刘全军；

【作者基本信息】 昆明理工大学 ， 矿物加工工程， 2004， 硕士

【摘要】 论文对国内外硫铁矿烧渣（即硫酸渣）综合利用的方法、途径做了相关的叙述；对云南省云峰化学工业公司所生产的硫铁矿烧渣进行了工艺矿物学研究；分析考察了烧渣中各主要矿物的形状、矿物特征、赋存状态以及连生形式等内容；根据矿物特征，分析了硫铁矿烧渣难以提高选别指标的原因。 根据工艺矿物学，制定了相应的流程论证，并选用重选、磁选、浮选及联合工艺流程对硫铁矿烧渣进行回收铁精矿的试验研究。通过试验，得到较优的工艺条件，结果表明，两段磁选—螺旋溜槽是较适合于该种硫铁矿烧渣的工艺流程；再经HCl、HF（或氨水）等酸浸（或氨浸）脱杂降硫除铅，获得品位为62.34％，回收率为78.08％的铁精矿产品，S、SiO₂、Pb、Cu的含量分别降为0.21％、8.26％、0.053％、0.023％。获得较为满意的选别指标。该工艺简单、操作简便、部分研究成果已经投入生产运营，经济效益明显。 采用反浮选的方法预处理烧渣筛上产物，进行了回收硫精矿的研究，在使用常规药剂的情况下，可得到S品位为38.67％，作业回收率为54.60％的硫精矿产品，达到了充分利用矿产资源的目的。更多还原

【Abstract】 The thesis does the related description to the synthesize utilization methods and path of the pyrite cinders exploitation at home and aboard; And proceeded the craft mineralogy research to the pyrite cinders produced by yunfeng chemistry industry company of Yunnan; Analysis and investigate the shape of the main mineral, mineral characteristic station of adhering to mineral and connect form etc. According to these features, find out the reason why pyrite cinders target is hard to enrichment.According to the craft mineralogy of pyrite cinders, the thesis discuss the methods how to separate the iron ore from gangue and how to remove sulfur effectively. The study adopt gravity-processing, magnetic -processing and flotation craft to do the experiment research of pyrite cinders in recovering iron. By the Test, we find out the better technological conditions, the results show that the secondary magnetic-spiral and spiral -magnetic are the better flowsheet for the pyrite cinders. Under the action of muriatic acid and hydrofluoric acid (ammonia), the content of sulphur, silicon, lead, copper are descend to 0.21%, 8.26%, 0.053%, 0.023%. A total iron concentrate containing 62.34% Fe is obtained with recovery of 78.08% Fe. The advantages of the methods are simple and convenient to operation. The company can get more profits after they apply the craft, the economic benefit will be viability.Under the condition of using routine reagent, adopt the methods of reverse flotation to do the research in recovering sulphur from +100 mesh production for pyrite cinders, the sulphur concentrate containing 38.67% S is obtained with recovery of 54.60% S, which get the target of utilizing the mine resource sufficient.更多还原