硅热法炼镁预制球团的实验研究

在硅热法炼镁物料预处理过程中，白云石煅烧时经常会损失大约5%的细粉料.为了解决这一问题，提出了将白云石先造球再进行煅烧处理的新工艺.主要研究了白云石球团进行分步煅烧后，球团内白云石的烧损率、煅白的灼减量及水化活度.结果表明:白云石制团后经过分步煅烧，球团内煅白的质量完全达到硅热法炼镁的要求，并有效地缩短了白云石煅烧时间.当煅烧1h时，球团内白云石的烧损率为45%，煅白的灼减量为189%左右，水化活度为35%，球团的吸湿远远小于白云石常规烧结.

Pellets Preparation by Direct Briquetting for Silicothermic Magnesium Production

During the preparation process of the raw material in magnesium production with silicothermic method， about 5% fines are lost in the dolomite calcination process. In order to solve this problem， a new technology was proposed that dolomite is made into pellets first， and then calcined to prepare pellets with high reactivity and stability. The burning loss of dolomite， the ignition loss of the calcined dolomite and the hydration activity of pellets were investigated after calcination. The results indicated that calcined dolomite with good properties can be prepared via direct briquetting technology， and the calcination time is shortened effectively. When calcination time reaches 1h， the burning loss of briquetted dolomite can reach 45%， the ignition loss of calcined dolomite can reach 189%， the hydration activity can reach 35%. The moisture absorption of pellets in this process is much less than that in conventional calcination process.