新疆某菱镁矿浮选工艺实验研究

胡生操; 王晨晨; 付金涛; 黄朝德

doi:10.3969/j.issn.1000-6532.2022.02.013

新疆某菱镁矿浮选工艺实验研究

1.
西部矿业股份有限公司锡铁山分公司，青海　海西　816203

2.
大冶有色设计研究院有限公司，湖北　黄石　435005

详细信息

作者简介: 胡生操（1994-），男，主要从事选矿工艺研究及工程设计。E-mail：1072081141@qq.com

中图分类号: TD97

收稿日期: 2020-07-13

刊出日期: 2022-04-25

Research on Flotation Process Test of Magnesite in Xinjiang

1.
Xitieshan Branch, Western Mineral Co., Ltd., Haixi, Qinghai, China

2.
Daye Nonferrous Design & Research Institute Co., Ltd., Huangshi, Hubei, China

Received Date: 13 July 2020

Publish Date: 25 April 2022

摘要

摘要:
对新疆某菱镁矿进行多元素及XRD衍射分析，该矿石主要成分为MgO，以碳酸镁的形式赋存与矿石中，脉石矿物主要以石英、白云石、方解石等为主的SiO₂、CaO类杂质，该矿石属工业四级品。针对该矿性质，本实验采用预先脱泥-反-正浮选的工艺流程，在磨矿细度为-74 μm 79.8%，矿浆pH值为6、水玻璃用量为500 g/t，十八胺300 g/t的条件下进行反浮选，可得到精矿品位为44.21%，作业回收率为91.17%的粗精矿；粗精矿在浮选矿浆pH值为9、六偏磷酸纳150 g/t、2#油100 g/t，捕收剂YSM-091为1500 g/t的条件下进行浮选，得到精矿品位46.31%，作业回收率91.23%的镁精矿。在较佳条件下，进行闭路实验，最重可得到品位为46.12%的精矿产品，综合回收率为77.83%，其主要杂质SiO₂、CaO的含量分别为0.92%、0.81%。对比菱镁矿品级技术指标，该精矿产品达到了工业一级品的要求。
- 低品位 /
- 菱镁矿 /
- 工业品级 /
- 预先脱泥 /
- 反-正浮选
Abstract:
The multi-element and XRD diffraction analysis of a magnesite in Xinjiang shows that the main component of the ore is MgO, which exists in the form of magnesium carbonate, and the gangue minerals are quartz, dolomite, calcite, etc, which are considered as fourth industrial grade products. Pre-sludge-reverse-direct flotation of ore, reverse flotation under the conditions of grinding fineness of -74 μm 79.8%, pulp pH=6, water glass dosage of 500 g/t, octadecylamine 300 g/t, The concentrate grade is 44.21%, the operating recovery rate is 91.17% of crude concentrate, and then the slurry pH=9, inhibitor 150 g/t, 2# oil 100 g/t, collector YSM-091 is 1500 g/t, Under the conditions of flotation, the concentrate grade of magnesium is 46.31% and the recovery rate is 91.23%. Under the best conditions, a closed circuit test can be carried out to obtain a final concentrate product with a concentrate grade of 46.12%, with a comprehensive recovery rate of 77.83%, and the main impurities SiO₂ and CaO have a grade of 0.92% and 0.81%, respectively. Compared with the technical indicators of magnesite grade, the concentrate product meets the first grade requirements in the industrial grade.
- Low grade /
- Magnesite /
- Industrial grade /
- Reverse-positive flotation /
- Pre-sliming

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图 1 菱镁矿脱泥实验流程

Figure 1.

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图 2 反浮选捕收剂用量实验流程

Figure 2.

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图 3 反浮选捕收剂十八胺用量实验结果

Figure 3.

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图 4 正浮选捕收剂用量实验流程

Figure 4.

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图 5 正浮选捕收剂用量实验结果

Figure 5.

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图 6 开路实验流程

Figure 6.

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图 7 闭路实验流程

Figure 7.

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表 1 原矿多元素化学分析结果/%

Table 1. Results of Multi-element chemical analysis

MgO	SiO₂	CaO	Fe₂O₃	Al₂O₃	P	S	K₂O	Na₂O	烧失
41.20	4.15	4.43	0.62	0.53	0.04	0.005	0.088	0.12	48.816

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表 2 菱镁矿脱泥实验结果

Table 2. Results of desliming of magnesite test

产物名称	产率/%	品位/%	回收率/%
粗砂	91.32	42.26	93.67
细矿泥	8.68	30.05	6.33
原矿	100.00	41.20	100.00

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表 3 开路实验结果

Table 3. Results of Closed circuit test

产品名称	产率/%	品位/%	回收率/%
精矿	68.62	46.29	77.10
中矿1	1.53	42.15	1.57
中矿2	1.70	35.30	1.46
正浮尾矿	7.64	28.30	5.25
反浮尾矿	11.83	28.96	8.32
细泥	8.68	30.05	6.33
原矿	100.00	41.20	100.00

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表 4 闭路实验结果

Table 4. Results of Closed circuit test

产品名称	产率/%	品位/%			回收率/%
产品名称	产率/%	MgO	SiO₂	CaO	MgO	SiO₂	CaO
精矿	69.53	46.12	0.92	0.81	77.83	15.41	12.71
尾矿	30.47	29.97	11.52	12.69	22.17	84.59	87.29
原矿	10000	41.20	4.15	4.43	100.00	100.00	100.00

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