轻烧白云石粉料制备碱式碳酸镁碳化工艺研究

金属矿山 ›› 2008, Vol. 38 ›› Issue (03): 83-86.

轻烧白云石粉料制备碱式碳酸镁碳化工艺研究

张黎黎，刘家祥，李敏

北京化工大学

出版日期:2008-03-15 发布日期:2011-07-21

Research on Carbonization Process for Producing Basic Magnesium Carbonate with Light-Burned Dolomite Powder

Zhang Lili，Liu Jiaxiang，Li Min

Beijing University of Chemical Technology

Online:2008-03-15 Published:2011-07-21

摘要/Abstract

摘要： 探讨了在常压下，以轻烧白云石粉料为原料采用二次碳化法制备碱式碳酸镁的反应机理，确定最优工艺条件。结果表明，在一二次碳化pH值停止点pH₁＝10、pH₂＝9，一、二次碳化CO₂分压为Pco₂1 =0.03 MPa、Pco₂2=0.1 MPa、碳化液浓度25 g/L、搅拌速度400 r/min的条件下，制备出长度为60 μm左右、截面直径为2 μm左右的棒状碱式碳酸镁，其氧化镁含量为42%，氧化钙含量为0.07%，白度为97.3%。

关键词: 轻烧白云石粉料, 二次碳化, 碱式碳酸镁

Abstract: The reaction mechanism and optimization process conditions of producing basic magnesium carbonate by twice-carbonization process from light-burned dolomite powder under normal pressure are discussed. The research results indicate that 60um long -2um diameter rod-like basic magnesium hydroxide containing 42% magnesium oxide and 0.07% calcium oxide and having a brightness of 97.3% can be produced at the following conditions: stop-point pH values for the primary and secondary carbonization being pH₁＝10 and pH₂＝9, carbonizing CO₂ partial pressure being Pco₂1 =0.03 MPa and Pco₂2=0.1 MPa, carbonizing solution concentration of 25 g/L and agitation speed of 400 r/min.

Key words: Light-burned dolomite, Twice-carbonization, Basic magnesium carbonate

张黎黎, 刘家祥, 李敏. 轻烧白云石粉料制备碱式碳酸镁碳化工艺研究[J]. 金属矿山, 2008, 38(03): 83-86.

ZHANG Li-Li, LIU Jia-Xiang, LI Min. Research on Carbonization Process for Producing Basic Magnesium Carbonate with Light-Burned Dolomite Powder[J]. Metal Mine, 2008, 38(03): 83-86.