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对多种文献资料的分析结果表明,从矿石中选出的黄铁矿精矿的特点是:精矿中物质组成比较复杂,含有贵金属和有色金属;脉石的含量很高,有时高达30～35％。 考虑到对黄铁矿精矿焙烧的主要目的是制取硫酸,因此无需排除脉石(即硅酸盐组份)。对高硫黄铁矿精矿焙烧时,硅酸盐组份的含量高,反而是一个有利因素。因为这在某种程度上还能降低精矿的粘结性。 但是,如果对黄铁矿精矿焙烧的目的在于综合回收精矿中所有的有价组份,则脉石含量高不仅会造成大量的冶炼货流量,提高冶炼费用,而且在处理过程中还会造成经济上的不合理性。
Analysis of various literature data shows that the pyrite concentrate selected from the ores has the following characteristics: the material composition of the concentrate is rather complicated and contains precious and non-ferrous metals; the gangue is very high in content, sometimes up to 30 ~ 35%. Considering that the main purpose of calcination of pyrite concentrate is the production of sulfuric acid, it is not necessary to exclude gangue (ie silicate components). High-sulfur pyrite concentrate roasting, silicate content is high, but is a favorable factor. Because it can also reduce the cohesion of the concentrate to some extent. However, if the purpose of the pyrite concentrate roasting is to comprehensively recover all of the valuable components in the concentrate, high gangue content will not only result in substantial smelt cargo throughput, increase smelting costs, but also in the process of treatment Cause economic irrationality.