年产350万吨转炉炼钢厂设计.doc

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建筑科技大学华清学院
本科毕业设计〔论冶炼周期38分钟，吹氧时间16分钟。
根据国外转炉炼钢技术的开展趋势，结合设计任务书中普碳钢和普碳钢的品种需要，选择了LF炉外精炼设备，进展全连铸生产。最终确定如下的的工艺流程：铁水预处理→转炉炼钢→LF精炼→连铸。
本次设计在对转炉物料平衡和热平衡计算的根底上，对炼钢车间的主要设备参数进展了设计、选型，完成了主体设备选择、炼钢工艺设计、主厂房工艺布置和设备布置。编制说明书一份，绘制转炉炉型图、车间平面图、剖面图各一，并完成题目为炼钢节能技术思路与对策的专题。
关键词：炼钢，顶底复吹，工艺流程，精炼，连铸，
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Design Description
At present, there are two main steel-making processes: converter steelmaking process with blast furnace hot metal and steel scrap as the raw materials and the arc (furnace) process with pre-reduction pellets or high-quality industrial steel scrap as raw materials. In this paper, the representative process bined-blowing o*ygen converter process with a scale of ×106 continuous casting billet annual is designed.. In the workshop, main equipments including 2×150t converters and its au*iliary equipments with 2 LF refining furnaces, 2 sets of slab continuous casting machines and a set of billet continuous casting machine are designed. The Smelting period is set for 38 minuter in which the actual o*ygen blowing time is only 16 minutes.
Depending on the development trend of steel-making process and the quality requirement of carbon steel and pressure vessel steel, LF refining is selected to fulfill continuous casting. Finally,thefollowing process flow is choosed: Pretreatment→Converter→LF→CC.
On the base of the material and heat equilibrim calculation,the size of steel-making plant workshop span and device assign, personnel placement is made .A project instruction is redacted ,furnace size graphic, a ground plane and a sectional view of the workshop are also submitted. And finally, the monograph which is about non-metallic inclusions in steel and its damagement is also finished.
Key words:steel making,bined-blown, process, refining, continuous casting
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