(1.昆明理工大學(xué)國土資源工程學(xué)院，昆明 650093；
2.廣東省科學(xué)院資源綜合利用研究所，廣州 510651；
3.稀有金屬分離與綜合利用國家重點(diǎn)實(shí)驗(yàn)室，廣州 510651；
4.廣東省礦產(chǎn)資源開發(fā)和綜合利用重點(diǎn)實(shí)驗(yàn)室，廣州 510651)
摘 要: 氧化鐵錳礦物中通常含有銀、銅等伴生元素，多以類質(zhì)同象或亞顯微包裹的形式與主元素錳結(jié)合共生，賦存狀態(tài)復(fù)雜。Mn-Ag-Cu結(jié)合礦在化學(xué)浸出過程中，三種離子可能會交互產(chǎn)生不良影響。因此，基于HSC Chemistry軟件進(jìn)行了Mn-Cu-Fe的電勢-pH分析，構(gòu)建了化學(xué)浸出平衡體系。根據(jù)銅在不同pH值和電勢條件下的物質(zhì)組成，推斷出酸浸后殘余的銅會消耗氰化物，影響銀的回收，據(jù)此進(jìn)行了氰化鈉用量優(yōu)化試驗(yàn)。結(jié)果表明，在酸浸終點(diǎn)pH=3.0時，殘余銅的影響較小，氰化鈉的用量可以從6000g/t降低至2500g/t，對礦山含氰尾渣的治理以及含氰廢水的回收利用具有一定意義。最終在工業(yè)化研究中，通過調(diào)整硫酸添加方式，確保了酸浸作業(yè)pH值在2~3的范圍內(nèi)，取得了銀浸出率92.30%、銅浸出率30.45%的穩(wěn)定試驗(yàn)指標(biāo)。
關(guān)鍵字: HSC Chemistry軟件；錳銀銅結(jié)合礦；化學(xué)解離；浸出機(jī)理；工業(yè)化
（1. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China;
2. Institute of Resources Comprehensive Utilization, Guangdong Academy of Sciences, Guangzhou 510651, China;
3.State Key Laboratory of Rare Metal Separation and Comprehensive Utilization, Guangzhou 510651, China;
4.Guangdong Provincial Key Laboratory of Development &Comprehensive Utilization of Mineral Resources, Guangzhou 510651, China）
Abstract:The oxide minerals of Fe and Mn contain Ag and Cu usually, which are mostly associated and combined with manganese in the form of isomorphism and submicroscopic inclusion. The occurrence state is complex.Mn, Cu and Fe ions may have adverse effects on each other in the process of chemical leaching. Therefore, the potential-pH analysis of Mn-Cu-Fe was carried out based on HSC chemistry software, and the chemical leaching system was constructed at the same time. According to the composition of copper under different pH and potential conditions, it is inferred that the residual copper in acid leaching will consume cyanide and affect the recovery of silver. Based on this, the optimization test of sodium cyanide dosage was carried out. The results show that, the remaining copper has little effect on the results at the end of acid leaching pH value of 3.0, and the dosage of sodium cyanide can be reduced from 6000g/t to 2500g /t. It is valuable for the treatment of cyanide tailings and the reuse of cyanide wastewater.Finally, in the industrial-scale research, by adjusting the way of adding H2SO4, the pH value of acid leaching is ensured to be in the range of 2-3.The silver leaching rate is 92.30% and that of copper is 30.45% in the stability test.
Key words: HSC chemistry software; manganese-silver-copper combined ore; chemical dissociation;leaching mechanism;industrialization
