【摘要】 为了解决低品位硼镁石矿的合理利用问题,本试验首次以碳化钙为还原剂,应用真空热法还原原理将煅烧后矿石中的游离氧化镁还原为金属镁。正交实验结果表明,最佳还原条件为还原温度1453K、还原时间2.0h、制团压力35MPa、还原剂过量系数10%,该条件下镁的还原率可达到64.5%。还原余料经处理后得到高附加值的富硼料。对比可知,富硼料是代替硼酸生产无碱玻璃球的理想原料。该工艺对环境无污染,为硼镁石矿的综合利用开辟了一条新途径。更多还原

【Abstract】 In order to effectively utilize the ascharite minerals which contain low grade B2O3,the paper studies the vacuum-thermal reduction of ascharite and deoxygenize magnesia into magnesium with calcium carbide as reductant.The orthogonal test shows that the best reducing condition is reduction temperature with 1453K,reduction time with 2h,briquetting pressure with 35MPa,excess reductant with 10%,and then the reduction degree can reach 64.5% under this condition.After treated,the residue of reduction process contains B2O3 with high added-value.According to the contrast,the residue could be used as raw materials to produce non-alkali glass ball.Environment can not be polluted through vacuumthermal reduction process.A new way to comprehensive utilize ascharite minerals is found.更多还原