钢铁制造流程炼铁区段耗散结构的解析

为了研究钢铁制造流程耗散结构的本质及其特征,以高炉炼铁区段为对象,研究解析了多工序协同动态运行条件下的耗散结构优化问题.由料场、焦化、烧结、球团、高炉等工序所组成的炼铁区段,不仅是钢铁制造流程中重要的物质/能源转换中心,也是全流程动态有序、协同连续运行的关键和基础环节.炼铁区段的物理本质是铁素物质流在碳素能量流的驱动和...

Analysis on dissipative structure of ironmaking procedure for iron and steel manufacturing process

In order to study the essences and characteristics of the dissipation structure of iron and steel manufacturing process, the blast furnace ironmaking segment is targeted, some issues are studied and analyzed for dissipative structure optimization under the condition of multi-process cooperative dynamic operation. The ironmaking segment composed of raw material yard, coking, sintering, pelletizing and blast furnace procedures, is not only an important material/energy conversion center in the steel manufacturing process, but also the key and basic link of dynamic, orderly, coordinated and continuous operation of the whole process. The physical essence of ironmaking segment is the process that iron ore converts/transforms into high temperature hot metal, forms blast furnace gas and liquated slag, and produces a lot of residual energy and heat, under drive and function of carbon element energy flow, and through a series of heat, mass and momentum transmission as well as complex metallurgical physical and chemical reaction engineering. This complex process requires multi-process cooperative coupling, dissipative structure optimization, and dynamic and orderly operation. The connotation of dissipative structure theory, the basic conditions for formation and maintenance of dissipative structure were analyzed, and it was pointed that the ironmaking procedure of steel manufacturing process was a typical dissipative structure. The progress of function analysis optimization and engineering evolution of main unit procedures for ironmaking segment was expounded. It was indicated that the formation and development of coking, sintering, pelletizing and other unit processes were the evolution result and engineering effect of function analysis optimization, integration optimization and reconstruction optimization for modern blast furnace. The optimization objectives included improving product quality and production efficiency, reducing operation costs and energy consumption, decreasing CO₂ and pollutant emissions, and achieving ecological environment friendliness. Based on the theory of dissipative structure, the theory and methods of function analysis, dissipative structure characteristics and dissipative structure construction and optimization of main units in ironmaking segment process were promoted, and the comparative analysis and selection of unit process function, as well as selection for parameters such as ability and quantity of equipment/device were discussed. Under the guidance of dissipative structure theory and metallurgical process engineering theory, the concept design, top-level design and dynamic precision design system of Shougang Jingtang Iron and Steel Plant were constructed, the dynamic-orderly, synergetic-continuous, and dissipative construction optimized production process had been established. Production practice with reasonable dissipative structure, low material and energy dissipation, advanced production and operational indices and significant economic and social benefits, has proved that the theory has great theoretical research and promotional application value.