诺里尔斯克镍业集团铜镍矿选矿工艺改进的新进展

本文介绍了近年来诺里尔斯克镍业集团进行塔尔纳赫选矿厂和诺里尔斯克选矿厂规模化扩能改造的进展情况,简述了诺里尔斯克镍业硫化铜镍矿原料来源与构成,以及近年来在选矿流程优化、设备改进、新药剂推广应用等方面取得的成果。

浅析镍羰化合成反应釜的工作效率

本文简述了世界羰基镍工业羰化合成反应釜的类型及特点,对常压、中压和高压三种合成反应釜的工作效率及用于羰化的物料情况进行了论述分析,认为使用粒状高镍合金在中压卧式转动反应釜合成羰基镍是羰化工艺的最佳选择。

硝酸浸出红土镍矿发展现状

随着世界硫化镍矿资源的不断消耗,提升或开发从红土镍矿中更高效、经济地提取镍和钻的工艺是目前及未来研究和关注的焦点。本文总结了目前国内外以硝酸作为浸出介质处理红土镍矿的湿法冶金工艺及目前工艺发展现状,旨在为红土镍矿湿法冶金工艺研究者提供一种研究思路。

Study on Optimization and Physical Simulation of Slag Entrapment in Mold With Electromagnetic Stirring

The level of the slag entrapment in mold involves the submerged nozzle immersion depth,the electromagnetic stirring intensity and other factors;this article has studied the relations between the slag entrapment behavior and the above factors by using of the water model.The results show that the surface velocity in meniscus increases with the increasing of stirring intensity and the decreasing of submerged nozzle immersion depth.When the submerged nozzle immersion depth is shallower,and the stirring intensity is high,the interface turbulence of the molten steel and slag is more severe,slag entrapment may occur in the extreme state.In order to avoid the slag entrapment in the working condition,the submerged nozzle immersion depth should be increased from 85;0mm to 100mm,or the electric current of the electromagnetic stirring should be reduced from 320A to 295A.