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本文叙述离析法处理墨西哥圣罗萨莉亚(Santa Rosalia)矿体的硫化-氧化矿石。虽然该矿的铜呈硫化物存在,但这种矿石极难浮选。其原因是这种硫化物粒度小,矿石氧化,且含大量粘土矿物。原矿的离析程度有限,因为铜的硫化物与 HCI 气体不发生反应.矿石在800℃下进行氧化焙烧,生成铜的氧化物。氧化的矿石,添加1%NaCl 和1.5%煤,在770℃下进行离析处理,获得含铜15.8%的精矿,其回收率为79.7%。矿石的其他金属中,只有银可进行离析,其回收率在70%以上。这种矿石的离析产品是硫化亚铜,而不是金属铜。造成这种不正常离析的原因是其中有碱土金属硫酸盐的存在,特别是 CaSO_4 的存在。根据过程参数与离析结果之间的关系及特点产生了这样的假设,即铜硫化物的产生类似于金属铜的生成。本研究的目的就是探讨硫化亚铜生成的详细机理。
This article describes the segregation process for sulfide-oxide ores in the Santa Rosalia, Mexico. Although the mine’s copper sulfide appears, but this ore extremely difficult flotation. The reason is that this sulfide particle size is small, ore oxidation, and contains a lot of clay minerals. The degree of segregation of the ore is limited because copper sulphides do not react with the HCI gas and the ore is calcined at 800 ° C to produce oxides of copper. Oxidized ores, with addition of 1% NaCl and 1.5% coal, were segregated at 770 ° C to obtain a 15.8% concentrate of copper with a recovery of 79.7%. Among the other ores of the ore, only silver can be isolated and the recovery rate is above 70%. The isolated product from this ore is cuprous sulphide rather than metallic copper. The reason for this abnormal segregation is the presence of alkaline earth sulfates, especially CaSO 4. According to the relationship between the process parameters and the segregation results and characteristics, the assumption is made that the production of copper sulphides is similar to the formation of metallic copper. The purpose of this study is to investigate the detailed mechanism of cuprous sulfide formation.