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以富硼渣为原料,在热力学分析的基础上探讨了MgO在碳热还原过程中的失重规律。实验表明,试样中镁组分的失重率随温度的升高而增大,MgO以镁蒸汽的形式挥发而造成失重,1 470℃、8 h时MgO的失重率为90.79%,挥发过程中又被重新氧化,和硼、硅组分一起形成白色粉末沉积在炉管口部,证明富硼渣碳热还原过程中存在MgO挥发现象。
Based on the thermodynamic analysis, boron-rich slag was used as raw material to study the law of weightlessness of MgO during carbothermal reduction. The experimental results show that the weight loss rate of magnesium increases with the increase of temperature. MgO volatilizes in the form of magnesium vapor and causes weight loss. The weight loss rate of MgO at 1 470 ℃ and 8 h is 90.79% And was re-oxidized, together with boron and silicon components to form a white powder deposited at the mouth of the furnace tube, demonstrating that there is a phenomenon of MgO volatilization during the carbothermal reduction of the boron-rich slag.