Yao X.-Z.,Kunming University of Science and Technology |
Yao X.-Z.,Key Laboratory of Unconventional Metallurgy |
Yao X.-Z.,Engineering Laboratory Microwave Energy Applied and Equipment Technology Yunnan Province |
Zhang Z.-B.,Kunming University of Science and Technology |
And 12 more authors.
Guocheng Gongcheng Xuebao/The Chinese Journal of Process Engineering
The process of microwave alkali-activation, water dissolving and HCl leaching to beneflciate Pt and Rh from discarded firebrick of glass fibre industry was studied. Comparison tests of microwave alkali-activation and conventional alkali-activation for discarded firebrick were carried out to investigate the effects of activation temperature, heating preservation time and additive dosage on alkali-activation reaction. The results show that the reaction is completed thoroughly when the test sample is alkali-activated by microwave at 800°C for 30 min, with additive NaOH dosage of 140%. After the clinker is dissolved in water, the residue is leached at the optimum conditions of HCl 3 mol/L, leaching time 5 min and ratio of HCl to residue 15 mL/g. Slurry is filtrated well. The residue generation rate is 2.98%, and Pt and Rh are beneficiated about 33 times. Source