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改善人造富矿的热态性能和高炉炉料结构的合理化是对精料工作提出的新要求。生产高品位、低FeO的高碱度烧结矿,是实现这种要求的重要一环。为此,应当采用低温氧化性烧结。在工艺上应当发展低熔点的多元铁酸钙液相体系,采取各种措施降低炭耗和用选择性制粒以控制烧结矿的亚微观结构。采用双碱度的炉料结构对改善高炉生产有重大意义,对软熔带结构亦无不利影响。采用双碱度炉料混装比分装的效果好。
Improving the thermal properties of man-made rich ore and the rationalization of blast furnace charge structure are new requirements for the work of concentrate production. Production of high grade, low FeO high alkalinity sinter is an important part of this requirement. To this end, low temperature oxidative sintering should be used. In the process, a low-melting multi-component calcium ferrite liquid phase system should be developed. Various measures are taken to reduce the carbon loss and to use selective granulation to control the submicroscopic structure of sinter. The use of double alkalinity charge structure to improve the production of blast furnace is of great significance to the structure of the soft melt belt has no adverse effects. The use of double-alkalisation charge mixed packing effect is good.