以南非铬铁矿为处理对象，研究了一种添加剂对铬铁矿氧化焙烧过程的影响。考察了配碱率（碳酸钠实际用量与理论用量的比值）、添加剂用量（添加剂占铬铁矿的质量分数）、焙烧温度、焙烧时间等因素对焙烧熟料浸出过程中铬、铝浸出率的影响。结果表明，添加剂的引入能够显著促进铬铁矿的氧化分解，明显降低焙烧温度，同时有效地抑制焙烧熟料中铝的浸出。在配碱率为1.1、添加剂用量为30%、焙烧温度为950 ℃、焙烧时间为2.5 h条件下，焙烧熟料中铬的浸出率达到98%、铝的浸出率降至24%，铬渣中氧化铬质量分数约为1%。

Effect of an additive on the oxidative roasting process of South Africa chromite was investigated.The effects of al?鄄 kali ratio（ratio of the actual amount to theoretical amount of sodium carbonate），additive dosage（mass fraction of additive on chromite），roasting temperature and roasting time etc.on the leaching rates of chromium and aluminum in the leaching process of the roasted mixture were studied.The results indicated that the additive could significantly promote the oxidative decompo?鄄 sition of chromite，remarkably reduce the roasting temperature，and effectively inhibit the leaching of aluminum from the roasted mixture.Under the conditions of alkali ratio of 1.1，additive dosage of 30%，roasting temperature of 950 ℃ and roasting time of 2.5 h， the leaching rates of chromium and aluminum were 98% and 24%，respectively，and the mass fraction of chromium oxide in the chromite processing residue was achieved about 1%.