碳化法从巴盟菱镁矿中提取高纯氧化镁  

Preparation of High-Purity Magnesia from a Magnesite Ore in Bameng

作　　者：易小祥[1] 杨大兵[1] 李亚伟[2] 

机构地区：[1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室 [2]武汉科技大学高温陶瓷与耐火材料湖北省重点实验室,武汉430081

出　　处：《矿产保护与利用》2008年第2期19-22,共4页Conservation and Utilization of Mineral Resources

摘　　要：采用碳化法处理巴盟菱镁矿,以煅烧制得的轻烧镁为原料,经消化、碳化、浸出和煅烧后,可获得MgO品位大于99.41%的高纯活性产品,MgO回收率达61.34%。其最佳工艺条件如下:煅烧温度800℃,轻烧时间2.5 h,振动磨磨样时间2.5 m in,消化时间30 m in,重镁水加温温度150℃,CO2通气量8 L/m in,通气时间3m in,液固比60∶1,二次碳化的pH值7.0。The carbonatation method can be used to process BAMENG magnesite ore and obtain light - burned magnesia. The magnesia was hydrated, carbonated, soaked and burned to get a high pure activated product containing over 99. 41% of MgO, and its MgO recovery rate reached 61.34%. The optimum technical condition are as follows： calcining temperature 800℃, light- burning time 2.5 hrs, milling time 2.5 min, hydrating time 30min, Mg （ HCO3 ） 2 liquid heating temperature 1 500℃, rate of carbon dioxide flowing 8 L per min and time 3 min, ratio of liquid to solid 60 ： 1, re - carlionation pH 7.0.

关 键 词：菱镁矿 隐晶质 碳化 高纯氧化镁 

分 类 号：TD973.7[矿业工程—选矿]