湖北某高磷高钙低品位碳酸锰矿选矿工艺研究

Beneficiation Process of Low-Grade Manganese Carbonate Ore with High Phosphorus and Calcium in Hubei Province

这是一篇矿物加工工程领域的论文。湖北某碳酸锰矿工艺矿物学研究表明,该矿石有价矿物为锰方解石、锰白云石和少量软锰矿,且单体解离度细,脉石矿物则主要为白云石、石英和云母,属于难选低品位高钙高磷碳酸锰矿。此类锰矿石的相关研究较少,存在处理工艺复杂、精矿产品品位低、处理成本高等问题。选矿工艺实验研究表明,在阶段磨矿至-74μm产品占90%的情况下,通过一次粗选一次扫选混合磁选精矿精选及精选尾矿再选长流程处理回收含锰矿物,再采用一段反浮选脱硅进一步富集,最终可得到Mn品位27.10%、P/Mn比为0.009、Mn回收率58.21%的选矿全流程锰精矿,可与其他低磷锰精矿混合作为冶金工业原料,以满足实际生产要求。

This is an essay in the field of mineral processing engineering.The process mineralogy study of a manganese carbonate ore from Hubei Province shows that the main valuable minerals of this ore are kutnohorite,calcimangite and a small amount of pyrolusite with fine monomer dissociation,the gangue minerals are dolomite,quartz and mica.The present manganese carbonate ore belongs to refractory low-grade manganese carbonate ore with high calcium and phosphorus.There are few studies on this type of manganese ore,thereby the treatment process is complicated with the low product grade and the high cost.The mineral processing results of this study reveal that,under the condition of 90%of the products from stage grinding to-74μm,manganese minerals were recovered by magnetic separation through the process of cleaning mixed concentrate with one roughing and one cleaning tailings,and further enriched by one-stage reverse flotation desilication.Finally,a manganese concentrate with Mn grade of 27.10%,P/Mn ratio of 0.009 and Mn recovery of 58.21%was obtained,which can be mixed with other low-phosphorus manganese concentrates as the metallurgical industrial raw material to meet the industrial requirements.