Experimental Study on Comprehensive Utilization of Bayan Obo Biotite Concentrate
With biotite concentrate produced in Bayan Obo as the main raw material,through roasting,hydrothermal leaching and enriching iron and aluminum components,the remaining components can be used as slow-release fertilizer.It is confirmed that the optimized roasting conditions are alkali ore ratio 0.8,reaction temperature 900 ℃;the best extraction condition is water thermal temperature is 250 ℃,and the leaching rate of Fe and Al components reaches 98.5％and 94.1％respectively.According to X-ray powder diffraction,ICP-AES,the main solid phase of roasting products are potassium silicate,sodium silica and potassium carbonate,and the main solid phase of extraction products is sodium magnesium hydroxide,phlogopite and hydroxysilica.
万方数据
维普
