【作者】 贺学兵；

【导师】 邹德宁； 马质廉；

【作者基本信息】 西安建筑科技大学 ， 冶金工程， 2003， 硕士

【摘要】 本文以酒钢高炉炼铁实践为依据，系统研究和分析了高炉上下部调剂技术对高炉冶炼的影响。认为高炉上下部调剂是高炉炼铁的核心技术，每一项新技术的应用都立足于高炉上下部调剂的正确结合。 根据实验室模拟及炉顶布料试验的分析研究得知，在酒钢高炉的技术装备和原燃料条件下，上部调剂应以分装多环布料为基本的上部调剂模式；下部调剂应以上下部调剂的匹配为核心，在保证全开风口工作的前提下，采取较高的鼓风动能与短风口、喷煤及富氧等技术相结合。对酒钢高炉长期存在的上部批重小和下部炉缸不活的问题，提出了杜绝长期堵风口作业的操作习惯，以确保规则的高炉工作炉型和良好的炉缸工作状况。高炉操作只要保证“上稳下活”，多环布料便能发挥出其应有的效果。 将提出的以全开风口作业和大批重分装为基础的多环布料的上下部调剂措施用于实际生产之后，炉缸工作日趋均匀、上部气流分布逐步稳定，高炉实现了长期稳定顺行的目标，促进了高炉的增产降焦工作，使酒钢的高炉操作水平取得了历史性的突破。截止2002年底，高炉焦比降至430kg／t，高炉煤比达100kg／t，取得了显著的经济效益。 理论分析和生产实践表明，在目前酒钢冶炼条件下，1号高炉(1800m~3)最佳批重为48吨，鼓风动能110～130KJ／s；2号高炉(1000m~3)最佳批重为28吨，鼓风动能80～90KJ／s。更多还原

【Abstract】 Based on the practice of iron-making in Jiuquan Iron & Steel Group Co., the influences of simultaneous conditioning of upper and lower parts on blast furnace iron-making were studied. It was considered as the kernel technique for blast furnace. Every new technique which be put into practice all depends on accurately combination with simultaneous conditioning of upper and lower parts measures.According to the experimental simulation results and the testing analysis of burden distribution in the furnace roof, it was found that certain rules should be followed under the conditions of Jiuquan blast furnace equipments and raw materials. Adjustment measures of the upper part should comply with the basic principle of separate and multi梤ing burden distribution, and the kernel of adjustment measures of lower part should be matching with the simultaneous conditioning of upper and lower parts. Under the precondition of fully-open tuyeres, high blast kinetic energy should be employed and combined with the techniques, such as: short-tuyere, coal injection and rich oxygen. A proposal was offered for forbidding to block the tuyeres over a long period of time, so that regular blast furnace shape and steady work condition of furnace hearth could be obtained. In the process of furnace operating, as long as the guideline "upper part being steady and lower part being active" be ensured, the effect of multi-ring burden distribution would go into effect.After the proposed measures being put into practice, such as: fully-opened tuyere working and multi-ring burden distribution on the basis of separate charge and heavy burden, working condition of furnace hearth became uniform gradually and the gas-flow distribution of the upper furnace went into stable state. The long-term stable and in regular sequence furnace goal was achieved. The realization of increasing production and reducing coke was accelerated. The operating level of Jiuquan blast furnace reached the highlight level in the history. Till the end of 2002, coke ratio fell to 430kg/t.Fe, coal ratio reached to 100kg/t.Fe. Remarkable economic benefits were obtained.From the theorical analysis and the practice, under present metallurgical condition of Jiuquan, some directions should be followed. For 1# BF(1800m3), the optimized burden weight is 48ton, blast kinetic energy 110~130KJ/s; For 2# BF(1000m3), the optimized burden weight is 28ton, blast kinetic energy 80?0KJ/S.更多还原