铜陵天马山含砷硫金精矿中金矿物嵌布粒度细且大部分被硫化矿包裹，致使金的氰化浸出难以进行。为了使金达到较好的浸出效果，在HCl-H₂O₂-添加剂体系中，对该金精矿进行了氧化预处理试验研究。在磨矿细度-0.048 mm占90%以上、矿浆浓度40 g/L、搅拌速度400 r/min、温度60 ℃、搅拌时间4 h、HCl浓度0.7 mol/L、H₂O₂浓度0.5 mol/L及添加剂乙二醇用量9 mL/L的氧化预处理条件下，Fe、As、Cu的溶解率分别为48.1%、99.3%和89.76%。金精矿经氧化预处理后，金的氰化浸出率比直接氰化浸出提高了33.6%，效果显著。该预处理方法可为同类含砷硫难选金精矿的开发利用提供一定的借鉴意义。

Gold cyanide leaching for a arsenic and sulfur-bearing gold concentrate at Tianmashan，Tongling，was difficult due to the fine disseminated grain sizes and large amounts of the gold mineral wrapped by sulfides.In order to improve the efficiency of cyanide leaching，some of tests regarding acidic oxidation pretreatment in the systems of HCl-H₂O₂-addictive were carried out under the conditions that the proportion of grinding fineness at -0.048 mm was 90%，pulp density at 40 g/L，stirring speed at 400 r/min，reaction temperature at 60 ℃，reaction time at 4 h，dosage of HCl at 0.7 mol/L，dosage of H₂O₂ at 0.5 mol/L and dosage of ethylene glycol at 9 mL/L.As a result，the dissolution rates of iron，arsenic and copper were 48.1%，99.3% and 89.76%，respectively.What’s more，the leaching rate of cyanide leached gold increased 33.6% than that of cyanide leached directly after oxidation pretreatment to gold concentrate.It was evident that the crystal structure of sulfide was destructed after oxidation pretreatment，meanwhile，the As，Cu and other ingredients were dissolved.Thus，the gold cyanide leaching rate increased.Finally，some guidance for other similar arsenic and sulfur-bearing refractory gold concentrate processing is provided，which is expected to be meaningful for applicability and development of the oxidation pretreatment with the HCl-H₂O₂-ethylene glycol.