本文選題：沉金后液 + 水合肼��； 參考：《Transactions of Nonferrous Metals Society of China》2017年04期

【摘要】：以某銅陽極泥氯化分金后的沉金后液為原料,研究能從中高效回收硒和碲的還原劑。首先,對沉金后液中有價元素的還原反應(yīng)進行了熱力學(xué)分析,在此基礎(chǔ)上研究不同還原劑體系對沉金后液中硒和碲回收率的影響;然后,采用單因素實驗研究水合肼還原體系中,各工藝條件對硒和碲回收率的影響;最后,在水合肼還原體系中加入鹽酸羥胺來強化對硒和碲的還原效果。結(jié)果表明,水合肼對硒和碲均有良好的還原效果,硒和碲的回收率分別為71.23%和76.50%;在水合肼用量為0.2133 mol/L、H+濃度為4.305 mol/L、反應(yīng)溫度為85°C、還原時間為5 h條件下,硒和碲的回收率分別達到92.07%和97.81%;當(dāng)鹽酸羥胺濃度為1.5116mol/L時,硒回收率為97.59%,碲回收率達到100%。
[Abstract]:A reductant for the recovery of selenium and tellurium from a copper anode slime after the chlorination of gold after gold precipitation was studied. First, the reduction reaction of the valence elements in the fluid after sinking gold was analyzed thermodynamically. On this basis, the effects of different reductant systems on the recovery of selenium and Tellurium in the liquid after sinking gold were studied. The effects of various technological conditions on the recovery of selenium and Tellurium in hydrazine reduction system were investigated. Finally, hydroxylamine hydrochloride was added to the hydrazine hydrate reduction system to strengthen the reduction effect of selenium and tellurium. The results showed that hydrazine had a good reduction effect on selenium and tellurium, the recovery of selenium and tellurium were 71.23% and 76.50%, respectively, and the dosage of hydrazine was 0. .2133 mol/L, the concentration of H+ is 4.305 mol/L, the reaction temperature is 85 C and the recovery time is 5 h, the recovery of selenium and tellurium is 92.07% and 97.81%, respectively. When the concentration of hydroxylamine hydrochloride is 1.5116mol/L, the recovery rate of selenium is 97.59%, and the recovery of tellurium reaches 100%.

【作者單位】： 中南大學(xué)冶金與環(huán)境學(xué)院;河南中原黃金冶煉廠有限責(zé)任公司;河南省黃金資源綜合利用重點實驗室;
【基金】：Project(201407300993)supported by Xinjiang Autonomous Region Science and Technology Support Project,China
【分類號】：TN304.1
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本文編號：1821321