旋流-静态微泡浮选柱在河南某微细粒钼矿的应用研究

陈新; 晁彦德; 黄业豪; 李树磊

doi:10.3969/j.issn.1000-6532.2023.05.002

旋流-静态微泡浮选柱在河南某微细粒钼矿的应用研究

doi: 10.3969/j.issn.1000-6532.2023.05.002

1.
栾川县鑫鑫矿业有限公司，河南　洛阳　471500
2.
栾川龙宇钼业有限公司，河南　洛阳　471000
3.
河南省地质研究院，河南　郑州　450016
4.
中国矿业大学，江苏　徐州　221116

基金项目: 国家自然科学基金青年基金（51904299）

详细信息

作者简介:
陈新（1981-），男，工程师，主要从事选矿生产及管理方面工作

通讯作者:
李树磊（1988-），男，博士，副教授，主要从事微细粒矿物浮选强化研究工作

中图分类号: TD952
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出版历程
- 收稿日期: 2022-08-03

Application of Cyclonic-Static Microbubble Flotation Column in a Fine-grained Molybdenum Ore in Henan Province

1.
Luanchuan Xinxin Mining Co., Ltd., Luoyang, Henan, China
2.
Longyu Molybdenum Mining Co., Ltd., Luoyang, Henan, China
3.
Henan Institute of Geology, Zhengzhou, Henan, China
4.
China University of Mining and Technology, Xuzhou, Jiangsu, China

摘要

摘要: 这是一篇矿物加工工程领域的论文。河南某钼矿属矽卡岩型钼矿，粒度嵌布细、泥质矿物含量高，浮选回收率一直偏低。本文通过对矿石性质、生产现状进行系统分析，指出生产中存在的主要问题。为适应选矿厂4000 t/d扩能改造需要，并协同强化微细粒钼矿回收，结合旋流-静态微泡浮选柱的结构特征与分选优势，提出了增加1台旋流-静态微泡浮选柱的改造方案。研究表明该钼矿嵌布粒度微细，-0.038 mm和-0.020 mm辉钼矿分别占75.80%和38.68%；矿石中含有大量的绿帘石、蒙脱石、绿泥石等泥质矿物，部分坑口泥质矿物含量40%以上；现有浮选工艺对微细粒级回收差，尾矿中-0.020 mm粒级钼矿损失占比在50%以上。实验室浮选实验结果表明旋流-静态微泡浮选柱对总尾矿和粗选尾矿中的钼均具有良好的浮选回收效果，精矿富集比和钼回收率均明显优于浮选机。工程应用进一步表明：旋流-静态微泡浮选柱对现有充气式浮选柱起到“兜底”的作用，扩能后钼回收率提高4个百分点以上，显著降低了微细粒钼在尾矿中损失，经济效益显著。
- 矿物加工工程 /
- 旋流-静态微泡浮选柱 /
- 辉钼矿 /
- 微细粒 /
- 回收率 /
- 浮选
Abstract: This is an essay in the field of mineral processing engineering. A molybdenum mine in Henan Province belongs to the skarn type molybdenum mine, which has the characteristics of extremely fine embedded particle size and high mud mineral content, and the molybdenum has suffered poor recovery. This paper systematically analyzed the ore properties and production status and analyzed the main problems existing in the production. In order to meet the needs of the 4000 t/d capacity expansion and reconstruction of the ore dressing plant, and to synergistically strengthen the recovery of fine-grained molybdenite particles, a cyclonic-static microbubble flotation column was proposed to add combined with the structural characteristics and separation advantages. The research results show that the molybdenum ore was embedded with micro-fine size, and -0.038 mm and -0.020 mm molybdenite accounted for 75.80% and 38.68%, respectively. Moreover, the ores contained a large amount of epidote, montmorillonite, chlorite and other argillaceous minerals, and the content of argillaceous minerals in some pit mouths was more than 40%. The existing flotation process has suffered poor recovery in the fine-grained particles, and the loss of molybdenum with -0.020 mm size in the tailings accounted for more than 50%. Laboratory flotation test results show that the cyclone-static microbubble flotation column had a good flotation effect on molybdenum recovery in total tailings and rougher tailings, and the concentrate enrichment ratio and molybdenum recovery rate were obviously better than flotation machine. The engineering practice further shows that the cyclone-static microbubble flotation column played a role in regaining better recovery for the existing flotation column, and the molybdenum recovery rate after the expansion was increased by more than 4 percentage points, and the loss of fine-grained molybdenite particles in tailings were significantly reduced, which achieved significant economic benefits.
- Mineral processing engineering /
- Cyclonic-static microbubble flotation column /
- Molybdenite /
- Micro-fine particles /
- Recovery rate /
- Flotation

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图 1 改造前粗扫选作业工艺流程

Figure 1. Process flow of roughing and scavenging before transformation

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图 2 尾矿镜下显微照片

Figure 2. Microscopic micrograph of tailings

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图 3 改造后粗扫选作业工艺流程

Figure 3. Process flow chart of roughing and cleaning after transformation

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图 4 两台浮选柱Mo作业回收率变化

Figure 4. Recovery rate change of Mo for the two flotation columns

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图 5 2台浮选柱泡沫产品粒度分析结果

Figure 5. Particle size analysis results of the flotation columns froth

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图 6 改造前后细粒级钼损失占比变化

Figure 6. Fine Mo loss change before and after modification

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表 1 粗选作业各产品Mo分布率变化

Table 1. Change of metal distribution rate of each product in roughing flotation

级别/mm	给矿Mo分布率/%		底流Mo分布率/%		泡沫Mo分布率/%
级别/mm	各级别	负累积	各级别	负累积	各级别	负累积
+0.15	1.79	100.00	2.24	100.000	0.00	100.00
-0.15+0.074	6.08	98.21	8.18	97.765	0.00	100.00
-0.074+0.043	13.27	92.13	3.78	89.585	6.69	100.00
-0.043+0.038	7.44	78.86	20.26	85.810	6.00	93.31
-0.038	71.42	71.42	65.55	65.550	87.31	87.31
合计	100.00	-	100.00	-	100.00	-

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表 2 尾矿镜下粒度统计分析结果

Table 2. Statistical analysis results of tailings particle size under microscope

粒径范围/mm	颗粒数n	平均粒径d/mm	n·d/mm	近似面积含量/%	累计含量/%
-0.08+0.04	3	0.043	0.13	3.33	3.33
-0.04+0.02	19	0.025	0.48	12.28	15.61
-0.02+0.01	81	0.013	1.059	27.10	42.71
-0.01+0.001	418	0.005	2.239	57.29	100.00
平均	521	0.008	3.908	100.00	-

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表 3 浮选柱与浮选机浮选实验结果

Table 3. Flotation results of flotation column and flotation machine

序号	产品名称	产率/%	Mo品位/%	回收率/%
A	粗精矿	1.34	1.8789	53.83
	扫一精	1.46	0.3323	10.37
	尾矿	97.20	0.0172	35.80
	合计	100.00	0.0483	100.00
B	粗精矿	1.17	2.6369	64.83
	扫一精	0.33	1.2957	8.88
	尾矿	98.50	0.0127	26.29
	合计	100.00	0.0476	100.00
C	粗精矿	2.13	0.2438	27.49
	尾矿	97.87	0.0140	72.51
	合计	100.00	0.0179	100.00
D	粗精矿	0.98	0.5944	30.99
	尾矿	99.02	0.0131	69.01
	合计	100.00	0.0188	100.00
A、B为粗选尾矿再选实验，C、D为最终尾矿再选实验；其中A、C为浮选机实验，B、D为旋流-静态微泡浮选柱实验。

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表 4 改造前后浮选技术指标分析

Table 4. Analysis of flotation technical indexes before and after transformation

名称		入选量/t	精矿Mo 品位/%	回收率/%	平均回收率/%
改造前	10月	58808	40.97	80.65	78.87
	11月	66165	40.98	77.55
	12月	64634	41.89	78.60
改造后	1月	67548	40.36	82.07	83.68
	2月	75024	42.36	86.57
	3月	68762	41.24	82.10
扩产后	6月	82939	40.15	82.9	82.90

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