云南某难选氧化锰矿石选矿试验研究  

Experimental Study on Beneficiation of a Refractory Manganese Oxide Ore in Yunnan

作　　者：周永星 孙晓妍 宋宝旭 袁经中 马念宇 王越 祝亚 黄恩铭 ZHOU Yongxing;SUN Xiaoyan;SONG Baoxu;YUAN Jingzhong;MA Nianyu;WANG Yue;ZHU Ya;HUANG Enming(School of Mining Engineering,University of Science and Technology Liaoning,Anshan 114001,China;Gejiu Nanxiang Co.,Ltd.,Gejiu 661000,China)

机构地区：[1]辽宁科技大学矿业工程学院,辽宁鞍山114001 [2]个旧市南翔有限责任公司,云南个旧661000

出　　处：《金属矿山》2022年第9期126-131,共6页Metal Mine

基　　金：辽宁省高等学校创新团队项目(编号:LT2018010)。

摘　　要：我国锰矿资源丰富,但存在原矿锰品位低、有用矿物嵌布粒度极细及脉石组分易泥化等问题,因此提高锰矿选矿技术水平有重要的实际意义。以云南个旧某氧化锰矿石为研究对象,结合矿石性质,采用洗矿—脱泥—磁选工艺流程开展选矿试验。结果表明:①原矿锰品位为6.40%,锰主要以硬锰矿、软锰矿等氧化锰矿物的形式存在,其中嵌布粒度为-0.01 mm的极微细粒氧化锰矿物产率较高。②采用洗矿—脱泥工艺,在搅拌强度为2000 r/min的条件下,通过实验室用水力旋流器可以脱除产率约为69%的矿泥,为后续沉砂获得高品位的锰精矿创造了有利条件。③针对沉砂中的氧化锰矿物,采用1粗1扫的强磁选流程,分别获得了锰品位29.13%和7.86%的磁性物,实现了粗粒级锰矿物的高效回收;针对矿泥中的氧化锰矿物,采用1次粗选的强磁选流程,获得了锰品位18.07%的磁性物,实现了微细粒级锰矿物的综合利用。全流程试验可获得累计产率16.08%、平均锰品位23.78%、累计回收率60.21%的锰精矿,实现了该难选极低品位高含泥锰矿的高效综合利用。Manganese ore resources in China are rich,but there are some problems such as low grade of manganese in raw ore,extremely fine disseminated grain size of useful minerals and easy slime of gangue components.Therefore,it is of great practical significance to improve the technical level of manganese ore dressing.Taking a manganese oxide ore from Gejiu,Yunnan Province as the research object,the beneficiation tests were carried out by the process of washing,desliming and magnetic separation combined with the ore properties.The results showed that:①the manganese grade of the raw ore is 6.40%,and manganese mainly exists in the form of manganese oxide minerals such as psilomelane and pyrolusite,among which the extremely fine manganese oxide minerals with the disseminated particle size of-0.01 mm have a higher yield.②Under the condition of stirring intensity of 2000 r/min,the ore slime with a yield of about 69%can be removed by the hydrocyclone in the laboratory,which creates favorable conditions for obtaining high grade manganese concentrate by subsequent sand settling.③For manganese oxide minerals in settled sand deposition,magnetic materials with manganese grade of 29.13%and 7.86%were obtained by using the high intensity magnetic separation process of one roughing and one scavenging,which realized the efficient recovery of manganese minerals with coarse grain size.For the manganese oxide minerals in the slime,the magnetic materials with manganese grade of 18.07%were obtained by the process of high intensity magnetic separation with one rough separation,and the comprehensive utilization of fine manganese minerals was realized.Through the whole process test,a manganese concentrate with a cumulative yield of 16.08%,an average manganese grade of 23.78%and a cumulative recovery rate of 60.21%was obtained,which realized the efficient and comprehensive utilization of the refractory extremely low grade and high mud-containing manganese ore.

关 键 词：极低品位 高含泥 氧化锰矿 脱泥 强磁选 

分 类 号：TD951[矿业工程—选矿] TD924