青海某伟晶岩型锂铍矿工艺矿物学研究

应永朋; 赵玉卿; 熊艳; 熊馨

doi:10.3969/j.issn.1000-6532.2023.05.014

青海某伟晶岩型锂铍矿工艺矿物学研究

1.
青海省地质矿产测试应用中心，青海　西宁　810008

2.
江西省地质调查院，江西南昌 330000

基金项目: 青海学者专项（QHS201802）

详细信息

作者简介: 应永朋（1991-），男，工程师，从事工艺矿物学研究及珠宝玉石鉴定工作

通讯作者: 赵玉卿（1987-），女，高级工程师，从事选矿工艺研究工作

中图分类号: TD954；P575

收稿日期: 2021-05-11

刊出日期: 2023-10-25

Process Mineralogy of a Pegmatite Lithium Beryllium Ore in Qinghai

1.
Qinghai Province Geology Ore Testing and Application Center, Xining, Qinghai, China

2.
Jiangxi Geological Survey Institute, Nanchang, Jiangxi, China

More Information

Corresponding author: Zhao Yuqing, bubblezyq@163.com

Received Date: 11 May 2021

Publish Date: 25 October 2023

摘要

摘要:
这是一篇工艺矿物学领域的论文。运用光学显微镜、化学多元素分析、化学物相分析、X射线衍射、扫描电镜—能谱仪等综合手段，对某伟晶岩型锂铍矿工艺矿物学特征展开研究。查明了矿石中矿物组成、化学性质、矿物的共生关系、主要矿物的粒度分布和连生特征等。在此基础上阐述了矿石中锂、铍等有价元素的赋存状态和影响矿石中锂、铍等有价元素回收的矿物学因素，为该矿的选矿工作提供了依据。
- 工艺矿物学 /
- 锂辉石 /
- 绿柱石 /
- 赋存状态 /
- 嵌布特征
Abstract:
This is an eassay in the field of process mineralogy. Using optical microscope, chemical multi-element analysis, chemical phase analysis, X-ray diffraction, scanning electron microscopy-energy spectrometer and other comprehensive methods, the process mineralogical characteristics of a pegmatite lithium beryllium ore were studied. The mineral composition, chemical properties, symbiosis relationship of minerals, particle size distribution of main minerals and connection growth characteristics in the ore were ascertained. On this basis, the occurrence state of valuable elements such as lithium and beryllium in the ore and the mineralogical factors affecting the recovery of valuable elements such as lithium and beryllium in the ore are described, which provides a basis for the beneficiation work of the mine.
- Process mineralogy /
- Spodumene /
- Beryl /
- Existence state /
- Embedded features

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图 1 锂辉石与钠长石连生

Figure 1.

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图 2 锂辉石内部包裹有微细粒的石英

Figure 2.

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图 3 锂辉石边缘蚀变成白云母

Figure 3.

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图 4 锂辉石边缘被锂绿泥石交代

Figure 4.

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图 5 绿柱石中包裹细粒的钠长石

Figure 5.

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图 6 铌钽铁矿分布于石英中

Figure 6.

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图 7 铌钽铁矿呈单体分布

Figure 7.

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表 1 矿石多元素分析结果/%

Table 1. Multi-element analysis results of the run-of-mine ore

Li₂O	BeO	Nb₂O	Ta₂O	Rb₂O	Cs₂O	K₂O	Na₂O	CaO
0.75	0.055	0.0081	0.0053	0.085	0.016	2.88	4.73	0.37

CaF₂	MgO	Al₂O₃	SiO₂	Fe₂O₃	TiO₂	P₂O₅	Pb	Zn
0.24	0.04	10.83	72.14	0.91	0.0059	0.21	0.0026	0.0066

Co	Ni	Cr	V	Mn	Mo	Sr	Au*	Ag*
0.0001	0.0003	0.0009	0.0002	0.10	0.0001	0.0014	0.001	0.01
*单位为g/t

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表 2 矿石的矿物组成及含量/%

Table 2. Mineral composition and content of the ore

钠长石	石英	钾长石	锂辉石	白云母	锂绿泥石	磷铝锂石
37.64	31.69	11.23	10.29	6.39	0.62	0.10

绿柱石	铁铝榴石	磷灰石	黑云母	方解石	其他	合计
0.39	0.35	0.25	0.20	0.11	0.74	100.00

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表 3 锂在不同矿物中的平衡配分

Table 3. Balanced distribution of lithium in different minerals

矿物名称	矿物含量/%	Li₂O含量/%	Li₂O金属量/%	占有率/%
锂辉石	10.29	6.94	0.714	95.19
锂绿泥石	0.62	2.43	0.015	2.01
磷铝锂石	0.10	10.16	0.010	1.35
白云母	6.39	0.17	0.011	1.45

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表 4 锂辉石和绿柱石的粒度分布

Table 4. Particle size distribution of spodumene and beryl

粒级/mm	锂辉石		绿柱石
粒级/mm	占有率/%	累计/%	占有率/%	累计/%
-0.833+0.589	6.40	6.40	0.00	0.00
-0.589+0.417	25.30	31.69	0.00	0.00
-0.417+0.295	18.04	49.73	11.52	11.52
-0.295+0.208	18.18	67.92	29.16	40.68
-0.208+0.147	12.55	80.46	13.68	54.36
-0.147+0.104	6.05	86.51	17.28	71.64
-0.104+0.074	4.55	91.06	12.51	84.15
-0.074+0.053	2.31	93.37	3.35	87.50
-0.053+0.043	1.57	94.94	2.89	90.39
-0.043+0.038	0.59	95.53	1.83	92.22
-0.038+0.020	3.30	98.83	4.87	97.08
-0.020+0.015	0.71	99.54	2.02	99.11
-0.015+0.010	0.38	99.92	0.75	99.86
-0.010+0.005	0.08	99.99	0.11	99.97
-0.005	0.01	100.00	0.03	100.00

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表 5 矿石中重要矿物的连生特征/%

Table 5. Connection growth characteristics of important minerals in ore

矿物名称	单体	连生体
矿物名称	单体	长石	云母	石英	磷灰石	其他
锂辉石	84.19	11.89	3.30	0.35	0.15	0.12
绿柱石	71.33	14.45	3.47	10.56	-	0.19

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