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Low-temperature oxygen-enriched roasting gold extraction method for sulfur, arsenic and carbon-containing refractory gold ore
According to the low-temperature oxygen-enriched roasting gold extraction method for the sulfur-arsenic-carbon-containing refractory gold ore, the refractory gold ore and a curing agent are mixed and then added into an oxidizing furnace, the temperature of the first stage is 300-450 DEG C, and roasting is conducted in a weak oxygen atmosphere for arsenic removal and arsenic fixation reaction; in the second stage, the temperature is 450-580 DEG C, rich oxygen is added, desulfurization, sulfur fixation and carbon removal reaction are carried out in a high-temperature and oxygen-rich roasting atmosphere, an environment-friendly gold leaching agent is added to leach gold in roasted sand, activated carbon is used for adsorption, a NaOH solution is used as a desorption solution, gold adsorbed by the activated carbon is desorbed at high temperature and high pressure and enters an electrolytic bath, and gold mud is obtained on a negative plate; the method comprises the following steps: washing with hydrochloric acid, drying, smelting to obtain a product gold ingot, leaching tailings after gold leaching with clear water to recover residual gold, then taking the tailings as general industrial solid waste, recycling generated flue gas and wastewater, capturing AS2O2 and SO2 generated by arsenic and sulfur reaction by a curing agent to form calcium arsenate and calcium sulfate solids, fixing the calcium arsenate and calcium sulfate solids in calcine, and enabling sulfur arsenide escaped from the flue gas to be recycled. And after being efficiently sprayed by an alkaline solution, the water can be discharged after reaching the standard.
本发明含硫砷碳难处理金矿石的低温富氧焙烧提金方法，将难处理的金矿石与固化剂混合后加入氧化炉内，第一阶段温度为300～450℃，在弱氧气氛中焙烧脱砷固砷反应；第二阶段温度为450～580℃，加入富氧，在高温富氧的焙烧气氛中的脱硫固硫和除碳反应，加入环保浸金剂浸出焙砂中的金，用活性炭吸附，用NaoH溶液作解析液，在高温高压下解析出活性炭吸附的金进入电解槽，在阴极板上得到金泥，用盐酸洗涤烘干后熔炼得产品金锭，浸金后的尾渣清水淋洗回收残金后作为一般工业固废，产生的烟气和废水回收循环利用，砷、硫反应产生的AS2O2、SO2被固化剂捕集形成砷酸钙、硫酸钙固态物固定在焙砂中，且烟气中逃逸的硫砷化物，用碱性溶液高效喷淋后，能达标排放。
Low-temperature oxygen-enriched roasting gold extraction method for sulfur, arsenic and carbon-containing refractory gold ore
According to the low-temperature oxygen-enriched roasting gold extraction method for the sulfur-arsenic-carbon-containing refractory gold ore, the refractory gold ore and a curing agent are mixed and then added into an oxidizing furnace, the temperature of the first stage is 300-450 DEG C, and roasting is conducted in a weak oxygen atmosphere for arsenic removal and arsenic fixation reaction; in the second stage, the temperature is 450-580 DEG C, rich oxygen is added, desulfurization, sulfur fixation and carbon removal reaction are carried out in a high-temperature and oxygen-rich roasting atmosphere, an environment-friendly gold leaching agent is added to leach gold in roasted sand, activated carbon is used for adsorption, a NaOH solution is used as a desorption solution, gold adsorbed by the activated carbon is desorbed at high temperature and high pressure and enters an electrolytic bath, and gold mud is obtained on a negative plate; the method comprises the following steps: washing with hydrochloric acid, drying, smelting to obtain a product gold ingot, leaching tailings after gold leaching with clear water to recover residual gold, then taking the tailings as general industrial solid waste, recycling generated flue gas and wastewater, capturing AS2O2 and SO2 generated by arsenic and sulfur reaction by a curing agent to form calcium arsenate and calcium sulfate solids, fixing the calcium arsenate and calcium sulfate solids in calcine, and enabling sulfur arsenide escaped from the flue gas to be recycled. And after being efficiently sprayed by an alkaline solution, the water can be discharged after reaching the standard.
本发明含硫砷碳难处理金矿石的低温富氧焙烧提金方法，将难处理的金矿石与固化剂混合后加入氧化炉内，第一阶段温度为300～450℃，在弱氧气氛中焙烧脱砷固砷反应；第二阶段温度为450～580℃，加入富氧，在高温富氧的焙烧气氛中的脱硫固硫和除碳反应，加入环保浸金剂浸出焙砂中的金，用活性炭吸附，用NaoH溶液作解析液，在高温高压下解析出活性炭吸附的金进入电解槽，在阴极板上得到金泥，用盐酸洗涤烘干后熔炼得产品金锭，浸金后的尾渣清水淋洗回收残金后作为一般工业固废，产生的烟气和废水回收循环利用，砷、硫反应产生的AS2O2、SO2被固化剂捕集形成砷酸钙、硫酸钙固态物固定在焙砂中，且烟气中逃逸的硫砷化物，用碱性溶液高效喷淋后，能达标排放。
Low-temperature oxygen-enriched roasting gold extraction method for sulfur, arsenic and carbon-containing refractory gold ore
含硫砷碳难处理金矿石的低温富氧焙烧提金方法
MA TINGRONG (author) / MA WEISHAN (author)
2022-11-29
Patent
Electronic Resource
Chinese
Chlorination Treatment for Gold Extraction from Refractory Gold-Copper-Arsenic-Bearing Concentrates
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