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五十年代以来,自熔性烧结矿的生产和使用,使高炉冶炼过程和技术经济指标发生了一次革命性的变化.但在长期的生产实践中,认识到自熔性烧结矿的冶炼性能,并非十分完善.在它的成矿过程中,生成相当数量的正硅酸钙(2CaO·SiO_2)和硅酸盐玻璃质.在温度剧变时,强度变差,粉末增多,恶化了高炉料柱透气性.另外对于使用部分烧结矿的高炉,自熔性烧结矿还不能使高炉摆脱兼作石灰石焙烧的沉重负担,仍然需加大量的生熔剂.为了改善烧结矿的冶炼性能和减少或取消生熔剂直接入炉,我厂在六十年代初着手进行低品位高硅矿的超高碱度烧结矿的试验和冶炼,使高炉技术经济指标得到了显著的改善.
Since the 1950s, the production and use of self-fluxing sinter has revolutionized the blast furnace smelting process and its technical and economic indicators.But in the long-term production practice, it is recognized that the self-fluxing sinter smelting performance, Not very perfect.In its metallogenic process, a considerable amount of calcium orthosilicate (2CaO · SiO_2) and silicate vitreous were formed.When the temperature drastically changed, the strength became worse and the powder increased, which deteriorated the permeability of blast furnace material column In addition, the use of some sinter blast furnace, self-fluxing sinter can not make the blast out as a heavy burden of limestone roasting, still need to increase the amount of raw flux.In order to improve the sinter smelting performance and reduce or cancel the raw flux directly Into the furnace, I plant in the early sixties early low-grade high-silicon ore ultra-high alkalinity sinter test and smelting, blast furnace technical and economic indicators have been significantly improved.