富硼渣碳热还原过程中MgO的失重

Volatilization of Boron From Boron-rich Slag in Carbothermic Reduction Process

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 thermodynamic analysis, the reduction and volatilization of boron in boron-rich slag were studied using carbothermal reduction method. The experimental results show that the mass loss rate of magnesium in boron-rich slag increases with rising temperature, of which the maximum is 90. 79% at 1 470℃ for 8h. Part of the volatilized matter formed white powder deposited at the opening of furnace tube and adhered to tube wall together with boron/silicon volatilized.