对难浸含金硫精矿进行微波焙烧,考察微波功率、矿量(即样品质量)和焙烧时间对样品质量损失率和浸出率的影响。结果表明:当微波功率为16 k W、焙烧时间为50 min、矿量为900 g时,样品质量损失率可达28.12%,浸出率可达71.56%,较原矿直接碘...对难浸含金硫精矿进行微波焙烧,考察微波功率、矿量(即样品质量)和焙烧时间对样品质量损失率和浸出率的影响。结果表明:当微波功率为16 k W、焙烧时间为50 min、矿量为900 g时,样品质量损失率可达28.12%,浸出率可达71.56%,较原矿直接碘化浸出率(9.82%)有了大幅提高。利用XRD和SEM技术分析焙烧前后样品的成分和表面形貌,微波焙烧后的样品较原矿更为松散、多孔,更利于浸出。展开更多
Microwave assisted leaching of complex copper sulphide concentrate with ferric chloride was investigated, and its mechanism was analyzed. The results show that the leaching rate by microwave irradiation heating is mu...Microwave assisted leaching of complex copper sulphide concentrate with ferric chloride was investigated, and its mechanism was analyzed. The results show that the leaching rate by microwave irradiation heating is much faster than that by conventional heating.展开更多
Leaching of blended slag(BS)was investigated in a microwave oven using hydrogen peroxide and acetic acid.The BSwas a mixture of converter and flash furnace slag containing51%Fe2O3,3.8%CuO,and3.2%ZnO.The important vari...Leaching of blended slag(BS)was investigated in a microwave oven using hydrogen peroxide and acetic acid.The BSwas a mixture of converter and flash furnace slag containing51%Fe2O3,3.8%CuO,and3.2%ZnO.The important variables thatinfluence the metal extraction yield were leaching time,liquid-solid ratio,H2O2and CH3COOH concentrations.The preferredleaching conditions were as follows:CH3COOH concentration4mol/L;H2O2concentration4mol/L;microwave power900W;leaching time30min;liquid-solid ratio25mL/g BS;leaching temperature100°C.Under these conditions,the metal extractions of95%Cu,1.6%Fe,and30%Zn were obtained.The results were compared with the traditional leaching results.It is evident thatmicrowave heating causes a reduction in the leaching time.Also,the extraction yield results indicate that selective leaching of BS canbe achieved under the preferred conditions.The dissolution kinetic of BS in hydrogen peroxide with acetic acid is controlled by ashrinking unreacted core model equation.The apparent activation energy and reaction order were found to be16.64kJ/mol and1.09,respectively.展开更多
文摘对难浸含金硫精矿进行微波焙烧,考察微波功率、矿量(即样品质量)和焙烧时间对样品质量损失率和浸出率的影响。结果表明:当微波功率为16 k W、焙烧时间为50 min、矿量为900 g时,样品质量损失率可达28.12%,浸出率可达71.56%,较原矿直接碘化浸出率(9.82%)有了大幅提高。利用XRD和SEM技术分析焙烧前后样品的成分和表面形貌,微波焙烧后的样品较原矿更为松散、多孔,更利于浸出。
文摘Microwave assisted leaching of complex copper sulphide concentrate with ferric chloride was investigated, and its mechanism was analyzed. The results show that the leaching rate by microwave irradiation heating is much faster than that by conventional heating.
文摘Leaching of blended slag(BS)was investigated in a microwave oven using hydrogen peroxide and acetic acid.The BSwas a mixture of converter and flash furnace slag containing51%Fe2O3,3.8%CuO,and3.2%ZnO.The important variables thatinfluence the metal extraction yield were leaching time,liquid-solid ratio,H2O2and CH3COOH concentrations.The preferredleaching conditions were as follows:CH3COOH concentration4mol/L;H2O2concentration4mol/L;microwave power900W;leaching time30min;liquid-solid ratio25mL/g BS;leaching temperature100°C.Under these conditions,the metal extractions of95%Cu,1.6%Fe,and30%Zn were obtained.The results were compared with the traditional leaching results.It is evident thatmicrowave heating causes a reduction in the leaching time.Also,the extraction yield results indicate that selective leaching of BS canbe achieved under the preferred conditions.The dissolution kinetic of BS in hydrogen peroxide with acetic acid is controlled by ashrinking unreacted core model equation.The apparent activation energy and reaction order were found to be16.64kJ/mol and1.09,respectively.
