高铁贫硼矿石适宜的选矿深度

酸法提硼工艺原料中的镁硼比是影响酸耗的主要因素。通过对高铁低硼矿石半工业试验结果的剖析，得出其开发利用途径是通过适宜的选矿深度，选取镁硼比降至最低的铁硼混合精矿供化工酸法或高炉熔炼分离。

铁矿石深度选矿工艺的现状及主要发展方向

本文通过一些实例介绍了铁矿石深度选矿工艺的现状,并指出了今后的发展方向。详细论述了世界铁矿石资源的情况、选矿工艺和常用的选矿设备以及提高铁矿石精矿质量的主要途径。着重介绍了俄罗斯联邦米哈依洛夫斯克采选公司磁铁矿精矿浮选精选的工艺流程和生产效益。

含磷矿石的深度选矿与综合处理工艺现状和主要发展方向

简要介绍了俄罗斯的磷矿资源的储量与分布情况。以希宾矿区的磷灰石-霞石矿床、科夫多尔斯克矿床和金吉谢普矿床的矿石选矿工艺为例,详细论述了含磷矿石的深度选矿和综合处理工艺的现状与主要发展方向。

Efficient enrichment of nickel and iron in laterite nickel ore by deep reduction and magnetic separation

The process of deep reduction and magnetic separation was proposed to enrich nickel and iron from laterite nickel ores.Results show that nickel-iron concentrates with nickel grade of 6.96%,nickel recovery of 94.06%,iron grade of 34.74%,and iron recovery of 80.44% could be obtained after magnetic separation under the conditions of reduction temperature of 1275℃,reduction time of 50 min,slag basicity of 1.0,carbon-containing coefficient of 2.5,and magnetic field strength of 72 kA/m.Reduction temperature and time affected the possibility of deep reduction and reaction progress.Slag basicity affected the composition of slag in burden and the spilling and enriching rate of nickel-iron from a matrix to form nickel-iron particles.Nickel-iron particles were generated,aggregated,and grew gradually in the reduction process.Nickel-iron particles can be effectively separated from gangue minerals by magnetic separation.