硫铁矿烧渣资源化开发与利用研究.pdf

昆明理工大学
似士学位论文
硫铁矿烧渣资源化丌发与利用研究
姓名:李华伟
中请学位数别:硕士
专业;矿物加工工程
指导教师:刘全军
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摘要
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;对云南省云峰化学エ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,
得到較优的工艺条件,结果表明,两段磁选一螺旋溜槽是较适合于该种
硫铁矿烧渣的工艺流程;再经HC1、HIF(或氨水)等酸漫(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、
Si02、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。
关键词:硫铁矿烧渣(硫酸渣)重选磁选反浮选酸浸
昆明理工大学硬士学位论文
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、Iead、 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
viabilit
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 targe
of utilizing the mine resource sufficient
Key words: pyrite cinders, gravity-processing, magnetic-processr
ng, reverse flotation, sulfuric acid