云南某铅锌矿一段磨矿介质优化

杨芳; 朱从杰; 谢峰; 李博; 李秀

doi:10.3969/j.issn.1000-6532.2023.02.005

云南某铅锌矿一段磨矿介质优化

doi: 10.3969/j.issn.1000-6532.2023.02.005

昆明冶金研究院有限公司，云南省选冶新技术重点实验室，共伴生有色金属资源加压湿法冶金技术国家重点实验室，云南　昆明　60031

详细信息

作者简介:
杨芳（1993-），男，工程师，硕士，主要从事选矿工艺研究及碎矿磨矿工作

中图分类号: TD952
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出版历程
- 收稿日期: 2021-01-20

Optimization Research about Primary Grinding Medium of Lead-Zinc Ore in Yunnan

Kunming Metallurgical Research Institute Co., Ltd, Yunnan Key Laboratory for New Technology of Beneficiation and Metallurgy, State Key Laboratory of Pressure Hydrometallurgical Technology of Associated Nonferrous Metal Resources, Kunming, Yunnan, China

摘要

摘要: 对云南某铅锌矿石测定原矿力学性质、粒度组成并通过磨矿介质的对比实验来解决其一段球磨机处理量偏低、细度不达标、产品粒度组成不合理等问题。实验结果表明，该矿石属于中硬偏软矿石，软硬分布不均匀，容重和韧性都偏高；控制工艺参数与现场接近，磨矿细度为-0.074 mm 65%时效果较佳；采用Φ80mm:Φ60mm:Φ40mm :Φ30mm =20:25:25:30钢球方案能提高磨矿效率和磨矿细度，同时降低过磨粒级含量。
- 铅锌矿 /
- 球磨机 /
- 球介质
Abstract: Mechanical properties and particle size composition of a lead-zinc ore in Yunnan were determined, and the problems such as low processing capacity of a section ball mill, substandard fineness and unreasonable particle size composition were solved through the contrast test of grinding medium. The experimental results show that the ore is medium hard and soft ore, with uneven distribution, and high bulk density and toughness. When the grinding fineness is 65% of -0.074 mm, the best effect is obtained. Plan of Φ80mm:Φ60mm:Φ40mm :Φ30mm =20:25:25:30 would improve grinding efficiency and grinding fineness, at the same time reduce the grinding grade levels.
- Lead-zinc ore /
- Ball grinding /
- Ball medium

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图 1 给矿粒度负累积曲线

Figure 1. Passing accumulation curve of ore feed size

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图 2 排矿粒度负累积曲线

Figure 2. Passing accumulation curve of product size

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图 3 溢流粒度负累积曲线

Figure 3. Passing accumulation curve of overflow size

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图 4 返砂粒度负累积曲线

Figure 4. Passing accumulation curve of returned size

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图 5 磨矿细度实验结果

Figure 5. Result of grinding fineness test

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图 6 磨矿介质配比实验结果

Figure 6. Result of grinding medium test

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表 1 球介质计算

Table 1. Calculation of ball medium

级别/mm	给矿产率/%	扣除-0.15 mm后待磨产率γ_待/%	各组适宜球径/mm	推荐球比
-20+5	10.15	20.04	80	20
-5+0.45	12.32	24.32	60	25
-0.45+0.2	12.17	24.03	40	25
-0.2+0.15	16.03	31.64	30	30
-0.15	49.34	——	——	——
合计	100.00	100.00	——	100.00

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表 2 钢球配比实验方案

Table 2. Plans of ball ratio test

方案	钢球配比	平均球径/mm
方案一	Φ80mm:Φ60mm:Φ40mm=40:30:30	62.0
方案二	Φ80mm:Φ60mm:Φ40mm :Φ30mm =20:25:25:30	50.0
方案三	Φ80mm:Φ70mm:Φ50mm :Φ40mm =20:25:25:30	58.0
方案四	Φ70mm:Φ50mm:Φ40mm :Φ30mm =20:25:25:30	45.5

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表 3 原矿力学性质

Table 3. Mechanical property of ore

原矿编号	单轴抗压强度/MPa	弹性模量10⁵/ (kg·cm^-2)	泊松比	容重t/ (g·cm^-3)
1	46.3	2.43	0.33	4.35
2	22.0	1.70	0.27	4.33
3	102.0	3.02	0.22	3.52

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参考文献(9)

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