论文部分内容阅读
美国生产的稀土主要用于合金钢中,以混合稀土金属或稀土—铁—硅合金添加,作夹杂物化学变性和形态变性用。稀土—铁—硅合金由稀土氧化物、氧化硅和铁的混合物在在1930℃以上碳热还原商业生产。商业合金含稀土30～50Wf％,回收率通常小于60％。为了改进制备工艺,达到最大的处理效果,美国矿物局研究了改善制备稀土—铁—硅合金的方法。
The rare earths produced in the United States are mainly used in alloy steel to be added as a mixed rare earth metal or rare earth-iron-silicon alloy for inclusion chemical modification and morphological modification. The rare earth-iron-silicon alloy is commercially produced from a mixture of a rare earth oxide, silicon oxide and iron at a carbothermal reduction above 1930 ° C. Commercial alloys containing rare earth 30 ~ 50Wf%, the recovery rate is usually less than 60%. In order to improve the preparation process, to achieve the maximum treatment effect, the US Bureau of Mines to study the preparation of rare earth - iron - silicon alloy.