CAJ | 학술논문

采用高温焙烧、硫脲-硫氰酸钠浸出难处理金矿中的金，研究焙烧温度、硫氰酸钠浓度、硫脲(Tu)浓度、Fe3+浓度、pH值、浸出温度和时间对金浸出率的影响，得到混合体系浸金的最优条件，并研究浸出过程中硫氰酸钠和硫脲的稳定性。结果表明：金的浸出率达到93.1%，超过相同条件下单一体系中的浸出率之和，硫脲与硫氰酸钠摩尔比对金浸出率和金电极稳定电位影响较大；硫氰酸钠使硫脲的稳定性降低，而硫脲使硫氰酸钠的稳定性增强。
채용고온배소、류뇨-류청산납침출난처리금광중적금，연구배소온도、류청산납농도、류뇨(Tu)농도、Fe3+농도、pH치、침출온도화시간대금침출솔적영향，득도혼합체계침금적최우조건，병연구침출과정중류청산납화류뇨적은정성。결과표명：금적침출솔체도93.1%，초과상동조건하단일체계중적침출솔지화，류뇨여류청산납마이비대금침출솔화금전겁은정전위영향교대；류청산납사류뇨적은정성강저，이류뇨사류청산납적은정성증강。
Gold was extracted from refractory gold ore using a process of roasting followed by thiourea-thiocyanate leaching. The effects of roasting temperature, initial concentrations of thiocyanate, thiourea and ferric as well as pH value, leaching temperature and time on the leaching rate of gold were investigated. The results show that the gold leaching rate is 93.1%under the optimum conditions, and the leaching rate in mixed system is greater than the sum of leaching rate in solutions with each individual lixiviant. The mole ratio of thiourea to thiocyanate has significant influence on the leaching rate of gold and open potential. Thiocyanate accelerates the decomposition of thiourea whereas thiourea alleviates the decomposition of thiocyante.