摘要
磁化焙烧技术是提高难选铁矿资源综合利用率的有效途径之一。对某鲕状赤铁矿进行了磁化焙烧的影响因素的试验研究,确定了最优的磁化焙烧—弱磁选工艺条件为无烟煤5%,焙烧温度850℃,焙烧时间60min,磨矿细度-0.074mm占70%,弱磁选磁场强度145.6kA/m。在此最优条件下,得到了铁品位和回收率分别为58.40%和87.86%的铁精矿指标,精矿中的硫达到冶炼要求,可以作配料使用;磷超标,如直接作为冶炼原料,尚需进一步试验研究。
Magnetizing roasting is one of the effective ways to improve the comprehensive utilization of refractory iron ores. The factors influencing the magnetizing-roasting of an oolitic hematite ore were studied and the optimal conditions of the process of magnetizing roasting-low intensity magnetic separation were determined to be： 5% anthracite, 850 ℃ roasting temperature, 60 min roasting time, 70% -0. 074 mm grinding size and 145.6 kA/m magnetic field intensity. At these optimal conditions, an iron concentrate grading 58.40% at an 87.86% iron recovery was obtained, with the sulfur content reaching the metallurgical requirement, which can be used as a component. However, it has a phosphorus content exceeding the standard, and a further study has to be made on its use as a direct metallurgical material.
出处
《金属矿山》
CAS
北大核心
2009年第5期57-59,共3页
Metal Mine
关键词
鲕状赤铁矿
磁化焙烧
弱磁选工艺
难选铁矿石
Oolitic hematite, Magnetizing roasting, Low intensity magnetic separation, Refractory iron ore
