攀钢高硫铁精矿提铁降硫试验研究
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摘要
攀枝花钢铁集团是我国钢铁生产的主要企业之一,在我国钢铁行业中占有重要的地位。攀枝花钒钛磁铁矿矿床是世界著名的铁矿床之一,矿产资源十分丰富,蕴藏着全国20%的铁,64%的钒,93%的钛,钒钛磁铁矿的远景储量在200亿t以上,并伴生有多种有价金属元素。但是攀钢的铁精矿含铁53%左右,含硫较高,达到0.6%以上。铁精矿中的硫会对后来的冶炼带来危害,对环境产生污染,因此本论文主要的目的是提高铁精矿的铁品位,降低硫的含量,从而提高铁精矿的质量。
本论文以攀枝花高硫低铁铁精矿为研究对象,进行了工艺矿物学研究,结果表明,该精矿中主要是钛磁铁矿,而硫是以硫铁矿形式存在。脉石矿物丰要为二氧化硅,碳酸盐等。以此为基础,论文试验采用磁-浮联合流程,提高铁的品位,降低硫的含量。
本论文进行了磨矿细度试验,磁选强度试验,药剂选择与用量试验,浮选时间试验等。经过条件优化的试验结果表明,可以将攀钢铁精矿中铁品位提高到57.17%,硫的含量降到0.26%,而铁的损失率仅为10.06%,使该铁精矿达到国家钛磁铁矿精矿的标准。同时含硫产品中硫含量达到15.68%,Co的品位达到0.41%,该产品基本上可作为生产硫酸的原料,Co也可在下步工序中回收利用。
Panzhihua Iron and Steel Group Company is one of the major steel production companies, which occupies an important position in China's steel industry. Panzhihua V-Ti magnetite deposit is one of the world's leading iron ore deposits, the reserves of iron, vanadium, and titanium account for 20%,64%, and 93% of the total reserves in China respectively, and the prospective reserves of vanadium and titanium magnetite are estimated over 20 billion tons, with a variety of valuable metals. The content of iron in the concentrate is only about 53%, the harmful element of sulfur for smelting, however, is higher than 0.6%. Therefore, the aim of this thesis is not only to improve the iron grade of the concentrate, but also to remove the sulfur from the concentrate, thereby improving the quality of iron concentrate.
In this thesis, the process mineralogy was conducted using the Panzhihua iron concentrate with low iron and high sulfur, the results show that:The main mineral is titanium-magnetite, sulfur is existing in the pyrite. The gangue minerals are mainly silicon dioxide, carbonate and so on. Based on the process mineralogy results, a joint process by magnetic and flotation technology was developed to improve the grade of iron and reduce sulfur content of the concentrate. The tests of grinding fineness, magnetic strength, flotation dosage, and flotation time were carried out in the thesis, and the results obtained from the comprehensive optimal conditions revealed that the concentrate grade of iron is increased to 57.17%, and the content of sulfur is decreased to 0.26%, the concentrate, hence, reaches the national standard for iron concentrate. Moreover, the sulfur content of the by-product is up to 15.68% with a cobalt grade of 0.41%, which can be used as raw material for the production of sulfuric acid.
本论文以攀枝花高硫低铁铁精矿为研究对象,进行了工艺矿物学研究,结果表明,该精矿中主要是钛磁铁矿,而硫是以硫铁矿形式存在。脉石矿物丰要为二氧化硅,碳酸盐等。以此为基础,论文试验采用磁-浮联合流程,提高铁的品位,降低硫的含量。
本论文进行了磨矿细度试验,磁选强度试验,药剂选择与用量试验,浮选时间试验等。经过条件优化的试验结果表明,可以将攀钢铁精矿中铁品位提高到57.17%,硫的含量降到0.26%,而铁的损失率仅为10.06%,使该铁精矿达到国家钛磁铁矿精矿的标准。同时含硫产品中硫含量达到15.68%,Co的品位达到0.41%,该产品基本上可作为生产硫酸的原料,Co也可在下步工序中回收利用。
Panzhihua Iron and Steel Group Company is one of the major steel production companies, which occupies an important position in China's steel industry. Panzhihua V-Ti magnetite deposit is one of the world's leading iron ore deposits, the reserves of iron, vanadium, and titanium account for 20%,64%, and 93% of the total reserves in China respectively, and the prospective reserves of vanadium and titanium magnetite are estimated over 20 billion tons, with a variety of valuable metals. The content of iron in the concentrate is only about 53%, the harmful element of sulfur for smelting, however, is higher than 0.6%. Therefore, the aim of this thesis is not only to improve the iron grade of the concentrate, but also to remove the sulfur from the concentrate, thereby improving the quality of iron concentrate.
In this thesis, the process mineralogy was conducted using the Panzhihua iron concentrate with low iron and high sulfur, the results show that:The main mineral is titanium-magnetite, sulfur is existing in the pyrite. The gangue minerals are mainly silicon dioxide, carbonate and so on. Based on the process mineralogy results, a joint process by magnetic and flotation technology was developed to improve the grade of iron and reduce sulfur content of the concentrate. The tests of grinding fineness, magnetic strength, flotation dosage, and flotation time were carried out in the thesis, and the results obtained from the comprehensive optimal conditions revealed that the concentrate grade of iron is increased to 57.17%, and the content of sulfur is decreased to 0.26%, the concentrate, hence, reaches the national standard for iron concentrate. Moreover, the sulfur content of the by-product is up to 15.68% with a cobalt grade of 0.41%, which can be used as raw material for the production of sulfuric acid.
引文
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