Study on Acid Leaching Purification of a Quartzite and Leaching Kinetics
Acid leaching purification method is one of the most commonly used methods in quartz processing and purification.In order to explore the process and reaction mechanism of efficient removal of iron impurity elements in quartz,a quartzite ore in Gansu Province was taken as the research object,and oxalic acid and hydrofluoric acid were used as leaching agents.The effects of different acid ratios,mass concentrations and acid leaching temperatures on the acid leaching effect were investigated,and the kinetic model of mixed acid leaching of quartzite ore was derived.The results show that the acid leaching temperature has a great influence on the acid leaching effect.85 ℃ is the best acid leaching temperature,and 1％HF+10％oxalic acid is the best leaching agent.After acid leaching,the Fe2O3 content of the quartzite ore is reduced from 442.23 μg/g of the concentrate after magnetic separation to 58 μg/g,and the iron removal rate can reach 86.88％.
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