Study on Microwave Pretreatment of Diaspore

Abstract:

The effects of microwave radiation pretreatment on the leaching behavior of diaspore were investigated. The influence of sodium hydroxide addition, microwave irradiation temperature and microwave irradiation time were studied, the mechanism of microwave roasting pretreatment was also studied. The results show that microwave roasting pretreatment can greatly improve the leaching efficiency of Al₂O₃, and decrease the mole fraction of digestion liquor. The optimal microwave roasting condition is that the sodium hydroxide addition is 100kg/t, the microwave irradiation temperature is 535°C, and the microwave irradiation time is 5min the roasting mechanical is that the increase of effective affecting acreage and the formation of high active alumina.

• Periodical: Advanced Materials Research (Volumes 233-235)
• Pages: 1262-1265
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.233-235.1262
• Online since: May 2011
• Authors: Yi Yong Wang, Fa Yu Wu, Hui Jin, Ji Dong Li, Zhi Ying Wang
• Keywords: Diaspore, High Active Alumina, Leaching Behaviour, Microwave Pretreatment, Mole Fraction

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