Study on the effect of microwave roasting pretreatment on nickel extraction from nickel-containing residue using sulfuric acid

Abstract Various means have been proposed to solve problems such as high ash content and complex composition in the recycling of nickel-containing residue produced by battery manufacturing enterprises. Microwave roasting pretreatment is improve nickel leaching rate from residue. The effect different experimental conditions like microwave temperatures, times, powers on was studied. It found that temperature more significant than those time power. Meanwhile, after pretreatment, could be increased 20.43%, weight material also reduced 21%. After at 450°C, there no change main phases material, but surface particles exhibited an apparent stratified dissociation phenomenon. Response methodology (RSM) used optimize parameters with response value. results showed reach 93.11% for power 962 W 6.2 min under 452°C.