Study on Process Mineralogy of Laodong Zhai Lead-Zinc Deposit, Danzhai County, Guizhou Province
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摘要:
老冬寨铅锌矿位于贵州省丹寨县，铅锌矿体主要赋存于震旦系陡山沱组（Pt3d）容矿地层中。本文采用化学分析、显微镜分析、X射线衍射以及电子探针分析分析测试手段，对老冬寨铅锌矿进行了工艺矿物学研究。研究结果表明，原矿综合样中闪锌矿含量为15.02%，方铅矿含量为0.81%，另见少量黄铁矿、黄铜矿；脉石矿物主要为石英（56.21%），其次为白云母（15.2%）和高岭石（6.55%），以及少量白云石、方解石等。Pb和Zn的主要载体矿物分别为方铅矿和闪锌矿，理论回收率分别为98.60%和87.90%。
Abstract:Laodong Zhai Lead-zinc deposit is located in Danzhai County, Guizhou Province. Lead-zinc ore bodies mainly occur in the Sinian Doushantuo Formation (Pt3d). In this paper, the process mineralogy of Laodong Zhai Lead-zinc deposit was studied by means of chemical analysis, microscope analysis, X-ray diffraction and electron probe analysis. The results show that the content of sphalerite and galena is 15.02% and 0.81% respectively , in raw ore comprehensive sample. Gangue minerals are mainly quartz (56.21%), followed by Muscovite (15.2%), kaolinite (6.55%), and a small amount of dolomite, calcite and so on. The main carrier minerals of Pb and Zn are galena and sphalerite, with theoretical recovery rates is 98.60% and 87.90%, respectively.
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Key words:
- Lead-zinc deposit /
- Process mineralogy /
- Occurrence state /
- Laodong Zhai /
- Danzhai County
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表 1 矿石的X荧光光谱分析结果/％
Table 1. X-ray fluorescence spectrum analysis of ores
Cu Pb Zn Cd Fe TiO2 MgO Mn 0.031 0.71 10.70 0.021 1.499 0.358 0.569 0.015 CaO S SiO2 Al2O3 BaO As K2O Co 0.406 5.413 65.903 8.461 0.115 0.00 1.912 0.004 
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表 2 原矿综合样矿物组成
Table 2. Mineral composition of ore samples
矿物 闪锌矿 方铅矿 黄铁矿 黄铜矿 石英 白云母 高岭石 斜长石 其他 合计 含量/% 15.02 0.81 0.81 0.08 56.21 15.20 6.55 2.11 3.21 100
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表 3 方铅矿电子探针分析结果/%
Table 3. Electron probe analysis results of galena
As S Fe Zn Pb Cu Cd Sb Co Ni 合计 ly-1 0.00 12.95 0.00 0.03 86.40 0.05 0.00 0.01 0.00 0.00 99.44 ly-2 0.00 12.90 0.01 0.00 87.58 0.00 0.00 0.02 0.00 0.00 100.51 ly-3 0.00 12.83 0.00 0.16 86.37 0.03 0.00 0.00 0.00 0.00 99.39 ly-4 0.00 12.61 0.00 0.12 86.08 0.00 0.00 0.02 0.00 0.00 98.83 ly-5 0.00 12.92 0.00 0.00 87.75 0.04 0.00 0.00 0.00 0.00 100.71 ly-6 0.00 12.73 0.03 0.00 86.53 0.06 0.00 0.00 0.00 0.00 99.34 平均 0.00 12.82 0.01 0.05 86.78 0.03 0.00 0.01 0.00 0.00 99.70
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表 4 闪锌矿电子探针分析结果/%
Table 4. Electron probe analysis results of sphalerite
As S Fe Zn Pb Cu Cd Sb Co Ni 合计 ly-7 0.00 34.10 4.49 61.57 0.00 0.00 0.00 0.00 0.00 0.00 100.15 ly-8 0.00 33.61 1.45 64.73 0.00 0.00 0.00 0.00 0.00 0.00 99.79 ly-9 0.00 33.82 2.37 63.61 0.00 0.00 0.00 0.00 0.00 0.00 99.81 ly-10 0.00 33.46 3.47 62.76 0.00 0.00 0.00 0.02 0.00 0.00 99.70 ly-11 0.00 33.81 4.25 61.59 0.00 0.00 0.00 0.01 0.00 0.00 99.65 ly-12 0.04 33.26 4.24 61.62 0.00 0.00 0.00 0.00 0.00 0.00 99.17 平均 0.01 33.68 3.38 62.65 0.00 0.00 0.00 0.01 0.00 0.00 99.71
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表 5 黄铁矿电子探针分析结果/%
Table 5. Electron probe analysis results of pyrite
数据 As S Fe Zn Pb Cu Cd Sb Co Ni 合计 ly-13 0.55 51.88 45.11 0.54 0.00 0.00 0.00 0.00 0.05 0.00 98.13 ly-14 0.27 51.66 45.39 1.14 0.00 0.00 0.00 0.00 0.08 0.00 98.54 ly-18 0.43 52.94 45.68 0.38 0.00 0.00 0.00 0.00 0.09 0.00 99.51 ly-19 0.14 53.60 45.27 0.60 0.00 0.00 0.00 0.00 0.12 0.00 99.74 ly-20 0.16 52.78 45.70 0.57 0.00 0.00 0.00 0.00 0.07 0.00 99.27 ly-21 0.26 36.26 63.55 0.09 0.00 0.05 0.00 0.00 0.11 0.00 100.31 平均 0.30 49.85 48.45 0.55 0.00 0.01 0.00 0.00 0.08 0.00 99.25
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表 6 黄铜矿电子探针分析结果/%
Table 6. Electron probe analysis results of chalcopyrite
数据 As S Fe Zn Pb Cu Cd Sb Co Ni 合计 ly-15 0.14 36.60 29.86 0.00 0.00 33.77 0.00 0.00 0.04 0.00 100.40 ly-16 0.16 35.54 30.04 0.00 0.00 33.03 0.00 0.00 0.00 0.00 98.77 ly-17 0.12 35.85 30.15 0.00 0.00 32.92 0.00 0.00 0.00 0.00 99.03 ly-22 0.13 34.72 30.68 0.00 0.00 33.45 0.00 0.00 0.05 0.00 99.04 ly-23 0.14 34.76 30.98 0.00 0.00 34.66 0.00 0.00 0.04 0.00 100.57 ly-24 0.12 35.69 30.75 0.00 0.00 34.52 0.00 0.00 0.02 0.00 101.10 平均 0.13 35.53 30.41 0.00 0.00 33.72 0.00 0.00 0.02 0.00 99.82
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表 7 主要矿石矿物的原生粒度统计
Table 7. Statistical table of primary grain size of useful minerals
粒径/μm 合计 >1000 1000～150 150～75 75～20 20～10 <10 闪锌矿/% 3.2% 13.2% 35.2% 40.8% 6.3% 1.3% 100% 方铅矿/% 1.6% 1.6% 9.8% 61.7% 25.3% 3.8% 100%
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表 8 矿石中铅锌元素分布规律统计
Table 8. Statistics of distribution law of lead and zinc elements in ores
矿物
名称矿物含量
/%Pb元素 Zn元素 含量
/%金属量
/%分布率
/%含量
/%金属量
/%分布率
/%闪锌矿 15.02 0.00 0.000 0.00 62.65 9.410 87.90 方铅矿 0.81 86.78 0.703 98.60 0.05 0.000 0.00 黄铜矿 0.08 0.00 0.000 0.00 0.00 0.000 0.00 黄铁矿 0.81 0.00 0.000 0.00 0.55 0.004 0.04 其他矿物 83.28 / 0.010 1.40 / 1.290 12.06 合计 100.00 / 0.71 100.00 / 10.70 100.00
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