(1. 中鋁中國銅業(yè)有限公司企業(yè)管理部，北京 100082；
2. 華北理工大學 礦業(yè)工程學院，唐山 063009)
摘 要: 采用單因素試驗和響應面試驗方法，對金精礦中性焙燒產(chǎn)物的自浸金過程中Na2SO3、CuSO4、NH3·H2O、Na2CO3等添加劑濃度進行優(yōu)化研究，分析各添加劑及其相互作用對金浸出率的影響規(guī)律、顯著性、次序。結(jié)果表明：金浸出率隨著Na2SO3濃度的增加逐漸增大，而隨NH3·H2O濃度、CuSO4濃度、Na2CO3濃度的增加呈先增大后降低的趨勢；CuSO4濃度和Na2CO3濃度對金浸出率的影響顯著，并且CuSO4濃度的影響顯著性大于Na2CO3濃度；在Na2SO3 0.14 mol/L、NH3·H2O 2.1 mol/L、CuSO4 0.06 mol/L、Na2CO3 0.12 mol/L最優(yōu)工藝條件下，金浸出率達到96.31%，試驗值與模型預測值間的誤差只有0.86%，響應面優(yōu)化得到的二次多項式模型是合理可靠的。同時，金精礦的中性焙燒-自浸金工藝為金的高效非氰浸出提供新思路。
關鍵字: 金精礦；中性焙燒產(chǎn)物；自浸金；非氰浸出；響應面法
（1. Department of Business Administration, Chinalco China Copper Corporation Limited, Beijing 100082, China;
2. College of Mining Engineering, North China University of Science and Technology, Tangshan 063009, China）
Abstract:The method of single experiment and response surface experiment were chosen to optimize the self-leaching process for roasted products of gold concentrate under neutral atmosphere. Different additives, such as Na2SO3, CuSO4, NH3·H2O, Na2CO3 and their concentrations were also optimized. Effects of different additives and their interaction on gold leaching rate, significance and influence order, were analyzed. The results show that gold leaching rate gradually increases as the concentration of Na2SO3 increases. However, gold leaching rate first increases and then decreases with the concentrations of CuSO4, NH3·H2O and Na2CO3. The concentrations of CuSO4 and Na2CO3 have significant effects on the gold leaching rate, and the impact of the concentration of CuSO4 upon the leaching rate is greater than that of Na2CO3. The gold leaching rate reaches 96.31% under the optimum processing conditions that the concentration of Na2SO3 is 0.14 mol/L, NH3·H2O of 2.1 mol/L, CuSO4 of 0.06 mol/L, Na2CO3 of 0.12 mol/L. The error value between the experimental and the predicted value is only 0.86%, indicating that the quadratic polynomial model deduced from the response surface methodology is reasonable. Meanwhile, the process of neutral roasting and gold self-leaching of gold concentrate provides a new way for the high-efficient non-cyanide leaching.
Key words: gold concentrate; neutral roasted product; gold self-leaching; non-cyanide leaching; response surface methodology
