硫脲法浸出废弃电脑线路板中金的研究

Abstract

Abstract:

Discarded computer circuit boards is a typical electronic waste,which is rich in precious metal resources,and gold recycling is a hot spot in the research of waste computer circuit board resources.The thiourea was used to leaching gold from discarded computer boards,and the effects of thiourea mass concentration,reaction time,reaction temperature,Fe ³⁺ mass fra-cion and pH on gold leaching rate were investigated.The results showed that when the thioureamass concentration was 12 g/L,the reaction time was 60 min,the reaction temperature was 30 ℃,the Fe ³⁺ concentration was 0.45% and the pH was 1.5,the gold leaching rate reached 90.93%. The thiourea method has a wide application prospect because of its high leaching rate,non-toxicity during leaching,low environmental pollution,easy regeneration of reagents,and small interference ions.

Key words: discarded circuit board, thiourea, gold, leaching

CLC Number:

X781

Huang Xianghao,Ke Changmei,Yang Jintang,Chen Mei,Ke Haibo,Yu Jinzhao. Study on gold leaching from discarded computer circuit boards by thiourea process[J]. Inorganic Chemicals Industry, 2019, 51(6): 62-64.

Figures/Tables 5

References 12

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Study on gold leaching from discarded computer circuit boards by thiourea process

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