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近年来,我厂对粉煤灰铁粉造球焙烧和在12米~3高炉上冶炼进行了生产试验。试验结果表明:粉煤灰铁粉造球及入炉冶炼在工艺技术上是可行的,经济上是有利的,效益是好的;成球混合料中燃料配比是影响球团矿高温强度的关键;80％的铁粉配用20％的生石灰粉可生产出碱度1.0左右的半自熔性球团矿;粉煤灰铁粉球团矿炼铁与铁矿石炼铁比较,前者具有炉况顺,冶强高,产量上升、焦比下降,接受大风、高温,有利于高炉强化冶炼操作等优点。为此,建议有条件的铁厂可试验生产。在如何改进粉煤灰铁粉磁选工艺,提高铁粉品位;如何进一步提高球团矿高温强度,以期适应较大高炉的冶炼要求等问题尚须进一步探讨。
In recent years, I plant on the fly ash ball making roasting and smelting in the 12 m ~ 3 blast furnace production test. The test results show that it is feasible and economical to make the ball and the smelting of the fly ash iron powder in the process technology, and the benefit is good. The ratio of the fuel in the ball mixing mixture is the high temperature strength affecting the pellet The key; 80% of the iron powder with 20% of the quicklime can produce a basicity of about 1.0 semi-self-fluxing pellets; fly ash iron pellets and iron ore ironmaking ironmaking compared with the former has Furnace condition, rule high, production increased, coke down, to accept the wind, heat, is conducive to strengthening the blast furnace smelting operation and so on. To this end, the proposed iron mills can test the production. How to improve the magnetic separation technology of fly ash iron powder to improve the quality of iron powder; how to further improve the high temperature strength of pellets in order to adapt to the requirements of smelting larger blast furnace need to be further explored.