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    • 66. 发明授权
    • Upgrading the nickel content from low grade nickel lateritic iron ores
    • 从低品位镍红土矿石中提炼镍含量
    • US4002463A
    • 1977-01-11
    • US670224
    • 1976-03-25
    • Antonios Nestoridis
    • Antonios Nestoridis
    • B03B9/00B03C1/015C22B5/10C22B23/00C22B23/02C22B1/08
    • C22B5/10B03B9/00B03C1/015C22B23/005C22B23/021
    • The nickel content from low grade nickel lateritic iron ore is upgraded by a combined process of segregation and magnetic separation or flotation. Ground ore is thoroughly mixed with a small quantity of calcium carbonate, calcium sulfate and coke and is sprayed with a solution of sodium chloride to make appropriate pellets. These pellets are gradually heated under a neutral or a slightly reducing atmosphere to a temperature of 1050.degree. C maximum for up to 90 minutes. Roasting at this temperature is carried out for a predetermined period of time so as to convert all the nickel from the ore to a metallic condition. The roasted material is cooled, ground in a water medium and finally subjected to a wet or dry magnetic separation or flotation separation treatment so as to obtain a rich nickel concentrate.The process may be carried without forming pellets merely by thoroughly mixing the ground ore with sodium chloride, limestone, gypsum and coke.
    • 低品位镍红土铁矿的镍含量通过分离和磁选或浮选的组合过程进行升级。 将矿石与少量碳酸钙,硫酸钙和焦炭充分混合,并用氯化钠溶液喷雾以制成适当的颗粒。 将这些颗粒在中性或稍微还原的气氛下逐渐加热到1050℃,最高达90分钟。 在该温度下焙烧预定的时间,以将所有的镍从矿石转化为金属状态。 将焙烧的材料冷却,在水介质中研磨,最后进行湿式或干式磁选分离或浮选分离处理,以获得浓的镍浓缩物。