微波还原焙烧中和渣制备氧化锌烟尘的研究

Study on Preparation of Zinc Oxide Dust from Neutralizing Slag by Microwave Roasting

对中和渣在微波场中的升温特性进行了研究。结果表明,中和渣具有良好的吸波特性。随着物料温度的增加,铅、锌挥发率明显增加。在微波功率1kW、焙烧温度1000℃条件下,微波焙烧中和渣过程中锌挥发率达到90.27%,铅挥发率高达98.63%,焙烧制备的氧化锌烟尘含锌49.06%、铅8.54%。微波焙烧中和渣制备氧化锌烟尘是可行的。

Heating characteristics of neutralizing slag in microwave field were investigated.The results show that neutralization slag has excellent microwave absorbing properties.Volatilization rate of lead and zinc rises significantly with increase of material temperature.Volatilization rate of zinc and lead is 90.27%and 98.63%respectively,and zinc and lead contents in calcined zinc oxide dust is 49.06%and 8.54%respectively,under microwave power of 1 kW and roasting temperature of 1 000℃.It is feasible to prepare zinc oxide dust with neutralizing slag by microwave roasting.