刚果(金)某氧化铜钴矿工艺矿物学特性及对浸出工艺的影响

王明燕; 肖仪武; 祁小军

doi:10.13779/j.cnki.issn1001-0076.2019.04.047

刚果(金)某氧化铜钴矿工艺矿物学特性及对浸出工艺的影响

1.
北京矿冶科技集团有限公司矿物加工科学与技术国家重点试验室，北京 102628

2.
中国黄金集团地质有限公司，北京 100012

详细信息

作者简介: 王明燕(1983-), 女, 广西桂林人, 硕士, 高级工程师, 主要从事工艺矿物学研究

中图分类号: TD91;TF803.2⁺1

收稿日期: 2019-10-25

刊出日期: 2020-02-25

Process Mineralogy and Its Influence on Metallurgy Technology of a Copper-cobalt Oxidized Ore in Congo (DRC)

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

2.
China Gold(Group)Geological Corporation, Beijing 100012, China

Received Date: 25 October 2019

Publish Date: 25 February 2020

摘要

摘要:
为合理开发利用刚果（金）某氧化铜钴矿提供理论依据，利用先进仪器—矿物参数自动定量分析系统（AMICS）、扫描电子显微镜等综合手段对该矿进行了工艺矿物学研究，指出影响铜钴浸出的矿物学因素。结果表明，铜的氧化率为92.22%，氧化铜矿物主要为孔雀石和蓝磷铜矿；钴的氧化率为85.84%，氧化钴矿物主要为水钴矿。矿石中铜钴矿物粒度分布不均，其中，铜矿物以中粗粒为主，钴矿物以中细粒为主，并且黏土矿物较多，铜钴矿物在粗磨条件下易与脉石裸露连生，因此建议在适当粗磨条件下采用酸法搅拌浸出工艺回收铜钴。矿石中分别有3.69%的铜和9.46%的钴以吸附态分布在褐铁矿和铁锰水合氧化物中，这部分铜、钴较难浸出，是影响浸出率提高的主要因素。
- 铜钴矿 /
- 氧化矿 /
- 工艺矿物学 /
- 浸出 /
- 刚果(金) /
- 矿物参数自动定量分析系统
Abstract:
Process mineralogy of copper-cobalt oxidized ore in Congo has been studied by multiple methods such as advanced instrμment—AMICS (Advanced Mineral Identification and Characterization System) and scanning electron microscope, which points out the mineralogical factors affecting the acid leaching of copper and cobalt. The results show that the oxidation ratio of copper is 92.22%, mainly in malachite and cornetite; the oxidation ratio of cobalt is 85.84%, mainly in heterogenite. The size distribution of copper and cobalt minerals in the ore is uneven, among which copper minerals are mainly mediμm-coarse, cobalt minerals are mainly mediμm-fine, and there are many clay minerals. The copper and cobalt minerals are easy to be exposed under the condition of coarse grinding, it is suggested that acid agitation leaching should be adopted for copper and cobalt recovery under proper coarse grinding conditions. 3.69% copper and 9.46% cobalt are distributed in limonite and Fe-Mn hydrated oxide in the adsorption state, and this part of copper and cobalt is difficult to leach, which mainly affects the improvement of leaching rate.
- copper-cobalt ore /
- oxidized ore /
- process mineralogy /
- leaching /
- Congo (DRC) /
- advanced mineral identification and characterization system

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图 1 矿石中重要矿物的嵌布特征反射光(-)

Figure 1.

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图 2 矿石中铁锰水合氧化物(1, 2)和孔雀石(3)背散射图

Figure 2.

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图 3 氧化铜矿物、水钴矿和硫化铜-钴矿物的粒度分布特征

Figure 3.

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表 1 矿石的化学分析结果

Table 1. Multi-element analysis results of the ore /%

Composition	Cu	Co	Pb	Zn	Mo	Fe	S	SiO₂	Al₂O₃	CaO	MgO	K₂O	Na₂O	C
Content	2.00	0.356	0.014	0.017	0.002	2.88	0.078	70.63	6.46	0.99	4.34	1.42	0.19	0.48

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表 2 矿石中铜的化学物相分析结果

Table 2. Chemical Phase analysis result of Cu in the ore /%

Phase	Oxidized copper	native copper	Secondary copper sulfide	Primary copper sulfide	Fe-Mn oxyhydroxides	Total
Cu Content	1.85	0.01	0.042	0.03	0.077	2.009
Distribution	92.09	0.50	2.09	1.49	3.83	100.00

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表 3 矿石中钴的化学物相分析结果

Table 3. Chemical Phase analysis result of Co in the ore /%

Phase	Oxidized cobalt	Cobalt sulfide	Fe-Mn oxyhydroxides	Total
Co Content	0.31	0.017	0.023	0.35
Distribution	88.57	4.86	6.57	100.00

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表 4 矿石的矿物组成及相对含量

Table 4. Mineral composition and relative content of the ore /%

Mineral	Content	Mineral	Content
malachite	1.74	quartz	61.91
cornetite	1.40	dolomite	2.78
tenorite^※	0.01	calcite	0.26
native copper	0.01	chlorite	14.54
chalcocite^※	0.04	muscovite	7.42
chalcopyrite	0.09	potash feldspar	4.01
heterogenite	0.57	albite	1.61
carrolite	0.04	kaolinite	0.33
pyrite	0.04	rutile	0.14
limonite	2.18	others	0.73
Fe-Mn oxyhydroxides	0.15
Note：chalcocite includes chalcocite, digenite, covellite and bornite；tenorite includes tenorite and cuprite.

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表 5 铜在各矿物中的平衡计算

Table 5. Equilibriμm calculation of copper in each mineral /%

Mineral	Content	Copper in minerals	The metal amount of Copper	Copper distribution
Malachite	1.74	57.44	1.00	49.86
Cornetite	1.40	56.63	0.80	39.64
Tenorite	0.01	79.85	0.01	0.52
Chalcocite	0.04	79.85	0.03	1.63
Chalcopyrite	0.09	34.63	0.03	1.50
Native copper	0.01	100.00	0.01	0.50
Carrollite	0.04	20.52	0.01	0.46
Heterogenite	0.57	7.81	0.044	2.21
Limonite	2.18	1.94	0.04	2.11
Fe-Mn oxyhydroxides	0.15	21.40	0.03	1.58
Total			2.006	100.00

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表 6 钴在各矿物中的平衡计算

Table 6. Equilibriμm calculation of cobalt in each mineral /%

Mineral	Content	Copper in minerals	The metal amount of Cobalt	Cobalt distribution
Heterogenite	0.57	54.53	0.31	85.84
Carrollite	0.04	38.00	0.02	4.70
Limonite	2.18	0.19	0.004	1.15
Fe-Mn oxyhydroxides	0.15	20.27	0.03	8.31
Total			0.361	100.00

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表 7 水钴矿的X-射线能谱分析结果

Table 7. SEM energy spectrum analysis of heterogenite /%

No.	Element
No.	O	Al	Si	P	Ca	Mn	Fe	Co	Cu
1	33.89	0.00	0.87	0.00	0.00	0.00	4.24	51.18	9.83
2	38.56	0.00	4.47	0.00	0.00	0.00	0.00	50.89	6.09
3	31.19	0.00	0.00	0.76	0.00	0.00	0.00	57.82	10.22
4	30.22	0.00	0.00	0.00	0.00	0.00	0.00	59.64	10.15
5	34.02	0.00	0.00	0.00	0.00	0.00	0.00	65.98	0.00
6	35.68	4.74	0.00	1.66	0.57	2.43	0.00	49.67	5.25
7	36.70	4.29	0.00	1.35	0.00	1.74	2.18	49.20	4.53
8	36.58	4.75	0.00	1.45	0.00	2.35	2.51	47.07	5.28
9	35.07	5.35	0.00	1.57	0.56	2.00	2.32	48.42	4.71
10	34.65	3.27	0.00	0.95	0.00	1.98	2.42	51.98	4.76
11	36.04	3.86	0.00	1.12	0.00	0.00	0.00	55.38	3.61
12	30.81	3.92	0.00	1.02	0.00	0.00	0.00	60.09	4.17
13	31.80	0.00	0.00	0.75	0.00	0.00	0.00	56.02	11.43
14	32.23	0.00	0.68	0.70	0.91	6.78	0.00	41.83	16.87
15	32.11	0.00	0.00	0.66	0.00	0.00	0.00	57.32	9.90
16	31.32	0.00	0.00	0.60	0.00	0.00	0.00	58.29	9.79
17	29.59	0.00	0.68	0.71	0.00	1.74	1.73	52.21	13.34
18	30.15	0.00	0.00	0.71	0.00	0.00	0.00	58.37	10.77
19	31.67	0.00	0.00	0.62	0.00	0.00	0.00	57.83	9.88
20	33.21	3.98	0.00	1.09	0.00	0.00	0.00	57.56	4.16
21	26.83	0.00	0.00	0.71	0.00	0.00	0.00	59.97	12.48
22	34.13	3.64	0.00	1.27	0.00	1.50	1.74	53.03	4.69

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刚果(金)某氧化铜钴矿工艺矿物学特性及对浸出工艺的影响

1. 北京矿冶科技集团有限公司 矿物加工科学与技术国家重点试验室，北京 102628 2. 中国黄金集团地质有限公司，北京 100012

作者简介: 王明燕(1983-), 女, 广西桂林人, 硕士, 高级工程师, 主要从事工艺矿物学研究

Process Mineralogy and Its Influence on Metallurgy Technology of a Copper-cobalt Oxidized Ore in Congo (DRC)

1. BGRIMM Technology Group, State Key Laboratory of Science and Technology of Mineral Processing, Beijing 102628, China 2. China Gold(Group)Geological Corporation, Beijing 100012, China

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目录

1.
北京矿冶科技集团有限公司矿物加工科学与技术国家重点试验室，北京 102628

2.
中国黄金集团地质有限公司，北京 100012

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

2.
China Gold(Group)Geological Corporation, Beijing 100012, China