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在微波炉中采用双氧水和乙酸溶液浸出由转炉和闪速炉渣组成的混合铜渣。该混合铜渣含51%Fe_2O_3、3.8%CuO、3.2%Zn。研究表明,对混合渣浸出率影响较大的因素有:浸出时间,液固比,双氧水浓度和乙酸浓度。在最优的浸出条件下:乙酸浓度4 mol/L,双氧水浓度4 mol/L,微波功率900 W,浸出时间30 min,液固比25 mg/L,浸出温度100°C,铜、铁、锌的浸出率分别可达到95%、1.6%和30%。与传统的浸出工艺相比较,微波浸出可缩短浸出时间,同时,可选择性浸出渣中的金属元素。动力学研究表明,渣中金属元素的浸出可用一收缩未反应核模型来描述,浸出反应的表观活化能为16.64 kJ/mol,反应级数为1.09.
Leaching a mixed copper slag consisting of a converter and a flash slag with a hydrogen peroxide solution and an acetic acid solution in a microwave oven. The mixed copper slag containing 51% Fe_2O_3, 3.8% CuO, 3.2% Zn. The research shows that the leaching rate of mixed slag have greater impact factors: leaching time, liquid-solid ratio, hydrogen peroxide concentration and acetic acid concentration. Under the optimal conditions of extraction, the optimal conditions were acetic acid concentration 4 mol / L, hydrogen peroxide concentration 4 mol / L, microwave power 900 W, leaching time 30 min, liquid / solid ratio 25 mg / L, leaching temperature 100 ° C, The leaching rates of zinc can reach 95%, 1.6% and 30% respectively. Compared with the traditional leaching process, microwave leaching can shorten the leaching time, at the same time, the selective leaching of the metal elements in the slag. Kinetic studies show that the leaching of metallic elements in slag can be described by a contracted and unreacted core model with an apparent activation energy of 16.64 kJ / mol and a reaction order of 1.09.