【摘要】 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。更多还原

【Abstract】 The quality of self-fluxing sinter made with the concentrate of Baotou iron ore which is characterized by its fluorine, potassium and sodium content, was very poor. After 1976, with the high basicity sinter process adopted, the cold and thermal strength and the reducibility of sinter were improved obviously but the problem of wall accretion still remained. To solve this problem, laboratory experiments on sinter with dolomite additions were conducted. In 1980, the industrial experiment on sintering with high basicity and high magnesia were proceeded in the sinter plant. The results indicated that when the magnesia content of the sinter reached 3-4%, a change in mineral composi tion of sinter occured, softening and melting temperature of sinter increased about 50℃ to 55℃ respectively. In addition, the low temperature reduction disintegration rate decreased 63.8%, and the high temperature reducibility was also improved. It shows that dolomite addition is a suitable measure to improve the metallurgical properties of the high basicity.更多还原