利用盐湖氯化镁—石灰制备硅热法炼镁用煅白的实验研究

Calcined Dolomite Synthesize with Lime and Megnesium Chloride from Salt Lake

中文关键词:  盐湖氯化镁  石灰  MgO·CaO

英文关键词:Magnesium chloride  Lime  MgO·CaO

中文摘要:

      以盐湖副产水氯镁石为原料,与一定比例的石灰反应得到氢氧化镁和氢氧化钙的混合沉淀物,该混合物经过滤、洗涤、烘干后在一定温度下煅烧得到符合皮江法炼镁用的合成煅白。实验结果表明,该工艺是可行的,在石灰/氯化镁摩尔比2.05~2.10∶1,反应时间1.0h,煅烧温度800 ℃,煅烧时间60 min时,合成的煅白中钙镁摩尔比0.95~1.07∶1,煅白的平均水活度达34%,符合硅热法炼镁用中间原料煅白的参数条件。该技术可为利用盐湖氯化镁制备金属镁新工艺开发提供数据参考。

英文摘要:

      :Using magnesium chloride and lime as raw materials, a mixture of magnesium hydroxide and calcium hydroxide can be synthesized by chemical synthesis method, and then the mixture was filtered, washed, dried and calcined at lower temperature. The results show that the technical route is feasible. The effects of Ca/Mg molar ratio, times, calcinations temperature and time on MgO·CaO were studied, the optimum technological condition is Ca/Mg molar ratio of raw materials at 2.05~2.10∶1, reaction time 1.0 h,and calcinations at 800 ℃ for 1.0h. The present study provides theoretical and technical basis for new technology of primary magnesium.