云南某难选氧化锰矿石选矿试验研究

金属矿山 ›› 2022, Vol. 51 ›› Issue (09): 126-131.

云南某难选氧化锰矿石选矿试验研究

周永星¹ 孙晓妍¹宋宝旭¹ 袁经中² 马念宇² 王越¹ 祝亚¹ 黄恩铭¹

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

出版日期:2022-09-15 发布日期:2022-10-13
基金资助:
辽宁省高等学校创新团队项目(编号:LT2018010)

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

ZHOU Yongxing¹SUN Xiaoyan¹ SONG Baoxu¹ YUAN Jingzhong² MA Nianyu² WANG Yue¹ ZHU Ya¹ HUANG Enming¹

1. School of Mining Engineering,University of Science and Technology Liaoning,Anshan 114001,China;2. Gejiu Nanxiang Co. ,Ltd. ,Gejiu 661000,China

Online:2022-09-15 Published:2022-10-13

摘要/Abstract

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 2 000 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。

关键词: 极低品位, 高含泥, 氧化锰矿, 脱泥, 强磁选

Abstract: 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:① the 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. ② Under the condition of stirring intensity of 2 000 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. ③ For 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.

Key words: extremely low grade,high mud content,manganese oxide ore,desliming,high intensity magnetic separation

周永星, 孙晓妍, 宋宝旭, 袁经中, 马念宇, 王越, 祝亚, 黄恩铭. 云南某难选氧化锰矿石选矿试验研究[J]. 金属矿山, 2022, 51(09): 126-131.

ZHOU Yongxing, SUN Xiaoyan, SONG Baoxu, YUAN Jingzhong, MA Nianyu, WANG Yue, ZHU Ya, HUANG Enming. Experimental Study on Beneficiation of a Refractory Manganese Oxide Ore in Yunnan[J]. Metal Mine, 2022, 51(09): 126-131.

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