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《Anhui Chemical Industry》 2009-04
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Study on Reaction Progress of Potash Feldspar and Calcium Chloride in Phosphoric Acid System

ZHANG Yan-yan,HAN Xiao-zhao,WANG Zhong-bing,LU Ya-ling (School of Chemical Engineering ,Hefei University of Technology,Hefei 230009,China)  
This paper based on the low-temperature hydrothermal reaction theory,investigated the hydrothermal reaction of the closed system at low temperature. The main reactants are K-feldspar and anhydrous calcium chloride. In the phos- phoric acid system,K and Al is extracted from the potassium feldspar by altering temperature,time and grain of K- feldspar. From the experiment,the optimum conditions are obtained: temperature 200 ℃,additive dosage 2.23mL(/g K- feldspar),ingredients ratio m (CaCl2): m (K-feldspar)= 1.5∶1,with dissolution rates of K2O and Al2O3 in K-feldspar up to 75% and 95% or higher.
【CateGory Index】: O611.3
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