Papers by Keyword: Bell-Less Top

Abstract: In recent years great progress is made in technical equipment of large blast furnace in China. A series of new process, technologies and equipment, integrated and developed on our own, are applied on newly built large blast furnaces and have been proved to be highly effective. After more than 20 years’ development and innovation of the bell-less top equipment designed and developed on our own, it has reached the advanced level in the world in terms of equipment reliability and service life; fully-dry impulse bag filter dedusting technology of BF gas, which is also developed on our own, has gained technical breakthroughs in terms of optimized system design, gas temperature control, pneumatic conveying of dedusting fines; the integrated innovative high-efficiency long-life high-temperature technology, through applying high-temperature preheating technology of combustion air, improving heat transfer efficiency of hot blast stove and optimizing structure of the hot blast stove system, enables the blast temperature to reach 1250°C with BF gas as fuel.

Abstract: The mathematical model of burden movement for bell-less top of BF is described in detail, and the model of burden movement on rotating chute is improved combined with collision of burden to chute and effect of coriolis force. The influence degree of charging parameters on coke main striking position and stock flow width is investigated though establishing burden model. The research shows that: The changing of coke main striking point position is obvious under increasing decline angle of chute and length of chute, and for the stock flow width, the effects of decline angle of chute and depth of stock line are most important.