预抛—分级回收工艺预选秘鲁某金铜铁多金属矿深部矿石

谭欣; 刘书杰; 肖巧斌

doi:10.13779/j.cnki.issn1001-0076.2020.06.016

预抛—分级回收工艺预选秘鲁某金铜铁多金属矿深部矿石

1.
矿冶科技集团有限公司, 北京 100160

2.
矿物加工科学与技术国家重点实验室, 北京 102628

详细信息

作者简介: 谭欣(1968-), 男, 湖南长沙人, 博士, 正高级工程师, 主要从事复杂难处理矿石分离技术研究, E-mail: tan_x@bgrimm.com

中图分类号: TD921⁺.7;TD982

收稿日期: 2020-10-08

刊出日期: 2020-12-25

Pre-concentration Process of Pre-throw—Classification Recovery of Pre-thrown Tailings on Deep Ore in a Au-Cu-Fe Polymetallic Deposit in Peru

1.
BGRIMM Technology Group, Beijing 100160, China

2.
State Key Laboratory of Mineral Processing Science and Technology, Beijing 102628, China

Received Date: 08 October 2020

Publish Date: 25 December 2020

摘要

摘要:
采用浅部矿的预选工艺对秘鲁某金铜铁多金属矿含Cu 0.127%、Au 0.08 g/t、S 2.08%、Fe 40.56%的深部矿石进行了选矿预选富集试验研究，为该矿石的合理预选工艺提供参考。结果表明，浅部矿的预抛—分级预选工艺（原矿-25 mm干抛—干抛精矿高压辊磨细碎—高压辊磨细碎产品湿抛—预抛尾矿分级回收）对深部矿石具有较好的适应性和预选富集效果，最终获得铜品位0.13%、铁品位48.76%、铜回收率87.49%、铁回收率97.93%的总预选精矿，总预选抛尾率为18.84%。项目成果为该矿石的合理预选工艺选择提供了参考，并为提高选厂后续磨浮作业的矿石入选品位，降低入磨矿量和磨选成本，综合回收矿石中铁铜等伴生有价金属创造了良好的前提条件。
- 金铜铁多金属矿 /
- 高压辊磨 /
- 干抛 /
- 湿抛 /
- 预选富集
Abstract:
To provide the reference for reasonable pre-concentration process for the deep ore of Au-Cu-Fe polymetallic deposit in Peru with 0.127% Cu, 0.08 g/t Au, 2.08% S and 40.56% Fe, the mineral processing pre-concentration test on the ore was studied, with a process of pre-throw—classification recovery for the shallow ore. It shows that the pre-concentration process of pre-throw—classification recovery for the shallow ore composing of dry throwing of raw ore -25 mm—fine grinding of rough concentrate by high pressure roller grinding—wet throwing of the fine grinding product by high pressure roller grinding—classification recovery of copper and iron from pre-thrown tailings has a good adaptability and pre-concentration effect for the deep ore, the concentrate with Cu grade 0.13%, Fe grade 48.76%, Cu recovery rate of 87.49% and Fe recovery rate of 97.93% can be obtained, and the tailings discarding yield can reach 18.84%. The research results provide the reference for the selection of the reasonable pre-concentration process for the ore, and have created a good prerequisite for improving the grade of beneficiation in the follow-up grinding and flotation operation, reducing the grinding amount of ore and the cost of mineral processing and comprehensively recovering the associated valuable metals such as iron and copper in the ore.
- Au-Cu-Fe polymetallic ore /
- high pressure grinding roller /
- dry magnetic separation /
- wet magnetic separation /
- pre-concentration

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图 1 预选富集给矿粒度分布曲线

Figure 1.

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图 2 磁场强度对干抛预选指标的影响

Figure 2.

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图 3 HPGR细碎产品粒度分析结果

Figure 3.

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图 4 磁场强度对-5 mm HPGR产品干抛预选指标的影响

Figure 4.

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图 5 选矿预选富集工艺全流程

Figure 5.

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表 1 试样的主要化学成分分析结果

Table 1. Analysis results of run-of-mine ore /%

TFe	Cu	Co	S	Au^*	Ag^*	Pb	Zn	FeO	Ni	TiO₂	SiO₂	Al₂O₃	K₂O	Na₂O	MgO	CaO	P	As	C
40.56	0.127	0.010	2.08	0.08	< 1	0.033	0.026	15.81	< 0.005	0.17	12.31	2.04	0.31	0.29	12.33	5.75	0.075	0.013	1.71
注：Ag、Au单位为g·t^-1。

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表 2 矿石中铁的化学物相分析结果

Table 2. Analysis results of iron phase of run-of-mine ore /%

Phase	Magnetic iron oxide	Magnetic iron sulfide	Non-magnetic iron sulfide	Hematite	Iron carbonate	Iron silicate	Total Fe
Fe content	36.67	1.33	0.96	0.37	0.13	1.10	40.56
Fe occupation rate	90.41	3.28	2.37	0.91	0.32	2.71	100.00

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表 3 不同皮带转速下的干抛试验结果

Table 3. Results of dry magnetic preconcentration under different belt speed

Belt speed /(m·s^-1)	Product	Yield/%	Grade/%		Recovery/%
Belt speed /(m·s^-1)	Product	Yield/%	Cu	Fe	Cu	Fe
1.5	Concentrate	79.23	0.12	49.72	73.39	97.84
	Tailings	20.77	0.17	4.20	26.61	2.16
	ROM	100.00	0.13	40.26	100.00	100.00
1.0	Concentrate	82.71	0.12	47.95	80.03	98.22
	Tailings	17.29	0.15	4.17	19.97	1.78
	ROM	100.00	0.13	40.38	100.00	100.00
0.5	Concentrate	82.99	0.12	47.76	80.79	98.47
	Tailings	17.01	0.14	3.62	19.21	1.53
	ROM	100.00	0.13	40.25	100.00	100.00

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表 4 磁场强度对-5 mm HPGR产品湿抛预选指标的影响

Table 4. Effect of magnetic strength on the index of wet magnetic preconcentrate for -5 mm HPGR product

Magnetic strength /(kA·m^-1)	Product	Operational yield/%	Grade/%		Operational recovery /%
Magnetic strength /(kA·m^-1)	Product	Operational yield/%	Cu	Fe	Cu	Fe
239	Concentrate	72.19	0.086	60.02	51.53	92.05
	Tailings	27.81	0.21	13.46	48.47	7.95
	Feed	100.00	0.12	47.07	100.00	100.00
358	Concentrate	82.18	0.10	55.60	70.19	97.31
	Tailings	17.82	0.19	7.09	29.81	2.69
	Feed	100.00	0.12	46.95	100.00	100.00
438	Concentrate	82.23	0.10	55.54	70.89	97.38
	Tailings	17.77	0.19	6.90	29.11	2.62
	Feed	100.00	0.12	46.90	100.00	100.00

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表 5 -5 mm HPGR产品磁选预选抛尾结果对比

Table 5. Comparison of index of magnetic preconcentration mode of -5 mm HPGR product

Preconcentration mode	Product	Operational yield/%	Grade/%		Operational yield/%
Preconcentration mode	Product	Operational yield/%	Cu	Fe	Cu	Fe
	Concentrate	91.97	0.12	50.14	90.16	98.99
Dry magnetic separation	Tailings	8.03	0.15	5.85	9.84	1.01
	Feed	100.00	0.12	46.58	100.00	100.00
	Concentrate	82.23	0.10	55.54	70.89	97.38
Wet magnetic separation	Tailings	17.77	0.19	6.90	29.11	2.62
	Feed	100.00	0.12	46.90	100.00	100.00

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表 6 -25 mm深部矿干抛尾矿筛析结果

Table 6. Screening results of tailings of dry magnetic preconcentration of -25 mm deep ROM

Particle size/mm	Operational yield/%	Grade/%		Operational recovery /%
Particle size/mm	Operational yield/%	Cu	Fe	Cu	Fe
+12	59.06	0.12	3.96	47.67	56.64
-12+10	8.01	0.031	3.11	1.67	6.02
-10+8	3.44	0.032	3.26	0.74	2.72
-8+5	6.55	0.11	2.92	4.84	4.63
-5+3	6.34	0.27	3.82	11.51	5.86
-3+1	5.41	0.24	4.77	8.73	6.25
-1	11.19	0.33	6.60	24.84	17.89
Tailings of dry magnetic separation	100.00	0.15	4.13	100.00	100.00

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表 7 -5 mm HPGR细碎产品湿抛尾矿筛析结果

Table 7. Screening results of tailings of wet magnetic preconcentration of -5 mm HPGR product

Particle size/mm	Operational yield/%	Grade/%		Operational recovery /%
Particle size/mm	Operational yield/%	Cu	Fe	Cu	Fe
+3	33.99	0.035	5.18	5.95	24.79
-3+1	11.82	0.10	7.38	6.16	12.29
-1+0.4	13.00	0.22	9.34	14.16	17.10
-0.4+0.25	7.38	0.32	8.11	11.88	8.43
-0.25+0.15	7.78	0.32	7.12	12.53	7.80
-0.15	26.03	0.38	8.07	49.32	29.59
Tailings of wet magnetic separation	100.00	0.20	7.10	100.00	100.00

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表 8 选矿预富集工艺全流程试验结果

Table 8. Results of full flowsheet of magnetic preconcentration process

Product	Yield/%	Grade/%		Recovery/%
Product	Yield/%	Cu	Fe	Cu	Fe
Magnetic concentrate	69.47	0.105	55.75	58.50	95.83
-5 mm dry magnetic tailings	3.56	0.27	5.41	7.88	0.48
-1 mm wet magnetic tailings	8.13	0.32	8.06	21.11	1.62
Total concentrate	81.16	0.13	48.76	87.49	97.93
+1 mm wet magnetic tailings	6.88	0.052	5.62	2.91	0.96
+5 mm Dry magnetic tailings	11.96	0.099	3.76	9.60	1.11
ROM	100.00	0.123	40.41	100.00	100.00

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参考文献(9)

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预抛—分级回收工艺预选秘鲁某金铜铁多金属矿深部矿石

1. 矿冶科技集团有限公司, 北京 100160 2. 矿物加工科学与技术国家重点实验室, 北京 102628

作者简介: 谭欣(1968-), 男, 湖南长沙人, 博士, 正高级工程师, 主要从事复杂难处理矿石分离技术研究, E-mail: tan_x@bgrimm.com

Pre-concentration Process of Pre-throw—Classification Recovery of Pre-thrown Tailings on Deep Ore in a Au-Cu-Fe Polymetallic Deposit in Peru

1. BGRIMM Technology Group, Beijing 100160, China 2. State Key Laboratory of Mineral Processing Science and Technology, Beijing 102628, China

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目录

1.
矿冶科技集团有限公司, 北京 100160

2.
矿物加工科学与技术国家重点实验室, 北京 102628

1.
BGRIMM Technology Group, Beijing 100160, China

2.
State Key Laboratory of Mineral Processing Science and Technology, Beijing 102628, China