氢氧化镁煅烧制备镁砂的工艺研究  

Research on the Process of Preparing Magnesia Sand by Calcination of Magnesium Hydroxide

作　　者：程俊峰 Cheng Junfeng(Shanxi Engineering Vocational College,Taiyuan Shanxi 030009,China)

机构地区：[1]山西工程职业学院,山西太原030009

出　　处：《山西冶金》2024年第9期64-66,72,共4页Shanxi Metallurgy

摘　　要：以盐湖镁资源生产的高纯氢氧化镁为原料,研究了高纯度镁砂的生产工艺。重点研究生坯制备过程中成型压力、保压时间、轻烧温度、轻烧时间、氧化镁含量对生坯密度的影响;研究高温煅烧过程中煅烧的温度与时间对颗粒密度的影响。最终确定最佳实验条件为:在900℃轻烧氢氧化镁3 h得到氧化镁,控制氧化镁与氢氧化镁的质量配比为1∶4,混合均匀后,在600 MPa下进行压片,并保压5 min,在1 600℃煅烧5 h。在该条件下得到的镁砂完全满足国标要求。The production process of high-purity magnesia sand was studied using high-purity magnesium hydroxide produced from salt lake magnesium resources as raw material.Focus on studying the effects of forming pressure,holding time,light burning temperature,light burning time,and magnesium oxide content on the density of green bodies during the preparation process.Study the effect of calcination temperature and time on particle density during high-temperature calcination process.The final optimal experimental conditions were determined as follows:magnesium oxide was obtained by lightly burning magnesium hydroxide at 900 ℃ for 3 hours,and the mass ratio of magnesium oxide to magnesium hydroxide was controlled at 1:4.After mixing evenly,the sample was compressed at 600 MPa and kept under pressure for 5 minutes,and then calcined at 1 600 ℃ for 5 hours.The magnesium sand obtained under these conditions fully meets the requirements of the national standard.

关 键 词：氢氧化镁 高温煅烧 镁砂 

分 类 号：TQ175.1[化学工程—硅酸盐工业]