蛇纹石综合利用新工艺.PDF

23 1 矿　冶　工　程 Vol.23 №1 2003 02 MINING AN METALLURGICAL ENGINEERING Feb ua y 2003 杨保俊, 于少明,单承湘 ( , 230009) 　:, 。 , , MgO 97 %, Mg2+ 96%。 , 90%。 :;;;; A New Technology of Comprehensive Utilization of Serpentine YANG Bao-jun, YU Shao-ming, SHAN Cheng-xiang (College of Chemical Technology , Hef ei University of technology , Hef ei 230009, Anhui, China ) Abstract:Using a new ci cluating activating acid-leaching technology, a new method fo p epa ation of light magnesium oxide and wate glass f om se pentine is p esented.The optimum ope ating conditions of its main p ocesses a e studied.The esults show that, unde the optimum ope ating conditions, the leaching atio of magnesium oxide in se pentine and the one of active silicon dioxide in acid-t eated esidue of se pentine a e above 97%, espectively and ecove y of Mg2+ acid-leaching filt ate is mo e than 96%.The quality of light magnesium oxide and wate glass obtained by this technology co esponds to the p oduct quality standa ds of the Peoples Republic of China, and the ove all ecove y of magnesium oxide in se pentine is mo e than 90%. Key words:se pentine;acid leaching;alkaline leaching;light magnesium oxide;wate glass 　　 , [1] 1 ∶1 。3MgO ·2SiO2 、、 ·2H O, 。 、, 2 , , 10.2 , t, 。 。 , 。 1　　　 , 、、、、、, , 。 , , ,, , 1 400 ～1 500 ℃ : 3MgO ·2SiO ·2H O+3H SO +(2m -5)H O ,、。