王家滩菱铁矿流态化磁化焙烧试验研究

Study on Magnetizing Roasting Tests of Wangjiatan Siderite under Fluidization

对王家滩菱铁矿在流态化状态下的磁化焙烧温度和焙烧气氛条件分别进行了试验研究。试验结果表明：焙烧矿样中菱铁矿热解率大于94.5%,磁性铁转化率大于89.94%;在弱还原气氛（1.5%CO）、800-1060℃的温度条件下,获得了铁回收率大于90.00%,精矿品位大于58.00%的指标;在1 000℃的温度条件下,无论在弱还原气氛（0-1.05%CO）还是弱氧化气氛（0.47%-1.85%CO）中焙烧,均能获得铁回收率大于90.00%的良好指标。

The effect of temperature and atmosphere conditions on the magnetization of Wangjiatan siderite under fluidization was investigated. The results showed that Fe concentrate grading of 58.00% at a 90.00% recovery was achieved under conditions of the thermal decomposition ratio over 94.5% and the magnetizing conversion ratio above 89.94% at the temperature of 800 N 1 060 ℃ and the reducing atmosphere of 1.5% CO. Whenever in the reducing atmosphere（0 - 1.05% CO） or oxidation atmosphere（0. 47 - 1.85% CO）, Fe recovery can reach achieved 90.00% at the temperature of 1000℃.