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摘要:
黄金矿山尾矿的大量排放与堆积不仅浪费资源和占用土地,还给人类和环境造成一定的危害。黄金尾矿中不仅含有金、银、铜和铅等有价成分及石英和长石等非金属矿物,还含有大量的硅铝氧化物和硅酸盐类物质,具有回收利用价值和广泛的工业用途。从黄金矿山尾矿的组成及危害入手,综述了黄金尾矿资源化利用的两个方向:一是利用焙烧、浸出和浮选等方法回收尾矿中的有价成分;二是对尾矿进行加工处理生产各种工业材料。最后总结了目前黄金尾矿资源化利用存在的问题和未来技术发展方向。
Abstract:the massive discharge and accumulation of gold tailings not only wastes resources and occupies land area, but also causes certain harm to environment and human beings. Gold tailings not only contain non-ferrous metals such as gold, silver, copper, lead, and non-metallic minerals such as quartz and feldspar, but also contain a large number of silicon aluminum oxides and silicate materials, which have the value of recycling and extensive industrial use. Starting from the composition and harm of gold tailings, this paper summarizes two directions for the resource utilization of gold tailings. One is to recover valuable components from tailings by roasting, leaching and flotation. The other is to use tailings to process and produce various industrial materials. Finally, the paper summarizes the existing problems and future technology development direction in the utilization of gold tailings.
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Key words:
- gold tailings /
- valuable components /
- industrial materials /
- resource utilization
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表 1 山东黄金矿山矿石处理统计结果
Table 1. Statistical results of ore processing in Shandong gold mines
产地 品位/(g·t-1) 处理量/万t 产量/万t 尾矿量/万t 尾矿量/处理量/% 三山岛金矿 0.99 400 6.5~8.4 391.6~393.5 97.9~98.4 焦家金矿 1.24 330 7.2~7.6 322.4~322.8 97.7~97.8 新城金矿 1.01 200 4.4 195.6 97.8 玲珑金矿 1.37 200 4.2 195.8 97.9 其他金矿 1~2 220 6.3 213.7 97.1 表 2 黄金尾矿主要化学组成[5]
Table 2. Main chemical composition of gold tailings
/% 尾矿产地 SiO2 Al2O3 CaO MgO Fe2O3 TiO2 K2O Na2O 烧失量 陕西黄龙 58.82 17.65 1.10 5.72 7.00 0.81 4.73 3.30 0.88 福建双旗山 64.03 9.51 4.64 2.81 4.00 2.16 2.75 1.56 8.54 山东三山岛 73.19 14.58 0.78 0.46 2.06 0.15 2.06 5.02 1.71 辽宁五龙 84.99 5.60 0.02 2.51 3.56 1.53 0.71 1.09 表 3 黄金尾矿在工业上的应用分类
Table 3. Application classification of gold tailings in industry
材料名称 主要原料组成 尾矿可替代的原料名称 掺入的尾矿量 产品特点 建筑砖体 以黏土为主;加入石灰、石膏、水泥等添加剂 黏土、胶凝材料 20%~100% 抗压强度高、性能好 水泥 石灰石、河砂、黏土 河砂、黏土 30% 抗压强度、透水深度、孔隙率、抗冻融循环能力和碳化深度均得到改善 混凝土 胶凝材料;粗细骨料和石膏、石灰等添加剂 粗细骨料、硅酸盐水泥 20%~40% 强度高、耐热耐久、保温隔热、易于加工、节能环保 陶瓷原料 长石、黏土、石英 长石、黏土 生成的矿物相稳定、材料性能良好,满足工艺要求 陶粒 页岩、黏土、煤粉 黏土 50%~90% 质量轻、强度高、各项指标良好 泡沫陶瓷 氧化铝、高岭土 硅铝氧化物 60%~80% 轻质、高强、防火、无毒、耐腐蚀 陶瓷釉料 石英、长石、黏土 长石、黏土 色泽度良好、经济环保 微晶玻璃 基础玻璃中添加一定量的晶核剂 硅酸盐、铝硅酸盐、石英等矿物成分 60%~75% 分布均匀,结晶度高、致密性好 -
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