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包头铁精矿的特点是含氟、钾、钠,生产自熔性烧结矿时质量差。1976年采用高碱度烧结工艺后,烧结矿的冷、热强度、还原性均有显著改善。但由于氟、钾、钠的作用,高炉结瘤问题仍然没有解决。为此,首先进行了添加白云石的实验室试验;1980年又进行了高碱度高氧化镁烧结矿工业试验。当氧化镁含量为3～4％时,烧结矿的矿物组成发生了变化,其软化、熔化温度分别提高了50℃和55℃,低温还原粉化率降低了63.8％,同时高温还原性能也改善了,这表明添加白云石是改善高碱度高氧化镁烧结矿冶金性能的好方法。
Baotou iron ore concentrate is characterized by fluorine, potassium, sodium, poor quality when producing self-fluxing sinter. After using high alkalinity sintering process in 1976, the cold, hot strength and reducing ability of sinter are significantly improved. However, due to the role of fluorine, potassium and sodium, the problem of blast furnace nodulation still remains unresolved. To this end, the first to add dolomite laboratory experiments; in 1980 and high alkalinity magnesia sinter industrial test. When the content of magnesia is 3 ~ 4%, the mineral composition of sinter changes. The softening temperature and melting temperature are increased by 50 ℃ and 55 ℃, respectively, and the reduction and reduction of low temperature is reduced by 63.8%. At the same time, the high temperature reduction performance is also improved This shows that the addition of dolomite is a good way to improve the metallurgical properties of high-basicity, high magnesia sinter.