Extracting gold from pyrite roster cinder by ultra-fine-grinding and resin-in-pulp
Extracting gold from pyrite roster cinder by ultra-fine-grinding and resin-in-pulp
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DOI：
10.1007/s11771-003-0065-z
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发表时间：
2003-03
影响因子：
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通讯作者：
Junhua Wei;Gui-you Yan;Bingkun Guo;Guilan Gao
中科院分区：
文献类型：
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作者：
Junhua Wei;Gui-you Yan;Bingkun Guo;Guilan Gao
采用pH值为10的超细磨浆树脂法从黄铁矿烧渣中提金。浸出过程中，以氧化铝球为搅拌介质，过氧化氢为浸出剂，六偏磷酸钠为研磨剂。以AM-2σ树脂为吸附剂，硫脲为洗脱剂，采用树脂浆中浸出法从硫铁矿烧渣的氰化矿浆中回收金。采用静态法和动态法分别考察了接触时间、温度、酸度等因素对金吸附的影响。研究了溶液流速对金的动态吸附和洗脱的影响。结果表明，AM-2σ树脂在氰化物溶液中具有良好的吸附性能，用0.1mol/L的盐酸和1mol/L的磺胺较容易地从吸附树脂上洗脱金。对金的吸附率和洗脱率均在98%以上。当浸出时间为2 h，液固比为4：1，氰化钠用量为3 kg/t，过氧化氢浓度为0.05%，六偏磷酸钠浓度为0.05%，吸附时间为30 m in，温度为10~30℃，树脂体积为3 m L，洗脱液与树脂的质量比为(10-20)：1，洗脱液流速为1.5 m L/m in时，金的浸出率可达85%。与传统浸出工艺相比，缩短了浸出时间，避免了复杂的过滤过程，降低了氰化钠消耗，金的浸出率提高了35%。
The ultra-fine-grinding and resin-in-pulp with pH value of 10 are used to extract gold from pyrite roster cinder. During leaching process, aluminium oxide ball is used as stirring medium, hydrogen peroxide as leaching agent and sodium hexametaphosphate as grinding agent. With AM-2σ resin as absorber and sulfocarbamide as eluent, gold is recovered from cyanide pulp of pyrite roster cinder by resin-in-pulp. The effects of contact time, temperature and acidity etc. on the gold absorption are investigated by static methods and dynamic method respectively. The effects of flow rate of solution on dynamic adsorption and elution of gold are studied. The results show that AM-2σ resin has good adsorbability in cyanide solution, and gold can be easily eluated from the loaded resin with 0.1mol/L hydrochloric acid and 1mol/L sulfocabamide. The adsorption rate and the elution of gold exceed 98%. When leaching time is 2 h, mass ratio of liquid to solid 4:1, consumption of sodium cyanide 3 kg/t, concentration of hydrogen peroxide and sodium hexametaphosphate 0.05% respectively, adsorption time 30 min, temperature 10–30 °C, volume of resin 3 mL, ratio of eluent to resin (10–20):1, velocity of eluent 1.5 mL/min, the leaching rate of gold reaches 85%. Compared with traditional leaching technology, it can reduce leaching time, avoid complex filter process, decrease sodium cyanide consumption and increase leaching rate of gold by 35%.