设计总说明:在现阶段，炼钢厂大多用氧气转炉炼钢法。本次设计按照任务书的要求进行100万吨年产规模小方坯氧气转炉车间工艺设计，通过查找资料计算数据确定车间相关尺寸。在熔池尺寸中，熔池直径D为3.7m，熔池深度h为1.18m，并且对h进行校准，保证其的合理性，如果计算不合理，则需要通过调整熔池直径的相关数据，并且再次重新计算h，直至数据合理为止。在炉帽尺寸中，炉帽倾角θ为65º，炉口直径d为1.85m，炉帽高度为2.34m，炉身高度是2.93m。而出钢口中心线水平倾角θ1选取15º。出钢口直径为13m。在氧枪设计中，计算出氧流量数值为240m3/min,并选用五孔喷头， Ma取值2.0，其出口压力与炉膛压力相等取值0.101MPa，可以计算得出氧压为0.790MPa，d喉为28mm，d出为36mm， L扩是66m， L喉=5mm，喷孔倾斜角口取15º。在氧枪枪身设计中，中心氧管管径是108mm，中层管内径140mm，外层钢管管径168mm。对于炼钢过程的物料平衡与热平衡计算选取100kg铁水为例，进行相关计算得出结果。精炼炉选用RH装置。在连铸机的设计中，其钢包最大允许浇筑时间是56min，铸坯断面选用160mm×160mm，它的工作拉速计算得出为1.875m/min,本次设计选用一机四流，计算得出流数是四流，所以是两台连铸机。在本次设计中，使用“三吹二”制，其中两个转炉处于生产过程，当其中一个炉子出现故障，还有一个炉子代替继续生产。转炉炼钢各跨间的设计中，装料跨的宽度是由两方面决定：转炉容量及其工艺布置，其宽度取值27m，长度是120m。转炉跨的宽度由炉子大小决定，长度与装料跨等长。连铸跨的宽度为30m，其长度为120m。

关键词: 氧气转炉;小方坯;车间设计

Process design of a small billet oxygen converter workshop with an annual output of 1 million tons

Design General Information：At this stage, Most steel mills use oxygen converter steelmaking. According to the mission statement of requirements, the design of this project will be carried out with a process design of a small billet oxygen converter workshop with an annual output of 1 million tons, and the relevant dimensions of the workshop will be determined by looking up data calculation data. In the bath size, the bath diameter D is 3.7m, the pool depth h is 9.0m3, and the h is calibrated to ensure its reasonableness. If the calculation is unreasonable, the relevant data of the bath diameter need to be adjusted. And recalculate h again until the data is reasonable. In the furnace cap size, the furnace cap inclination angle θ is 65°, the furnace mouth diameter d is 1.85m, the burner cap height is 2.34m, and the height of the furnace body is 2.93m. The tapping angle θ1 of the centerline of tapping outlet is 15o.The Steel outlet diameter is 13m. In the lance design, Calculate the oxygen flow value as 240m3/min, and a five-hole nozzle is used. Ma has a value of 2.0. Its outlet pressure and furnace pressure are equal to 0.101 MPa. It can be calculated that the oxygen pressure is 0.790 MPa, d throat is 28 mm, d is 36 mm, L is 66 m, L throat is 5 mm, and the orifice inclination angle is 15o. In the lance design, the diameter of the central oxygen tube is 108mm, the inner diameter of the middle tube is 140mm, and the outer diameter of the steel tube is 168mm. Choose 100kg molten iron as an example, correlation results calculated material balance for the steelmaking process and the heat balance calculation. The refining furnace uses RH devices. In the design of continuous caster, the maximum allowable pouring time of the ladle is 56min, the section of the strand is 160mm×160mm, Its working speed is calculated to be 1.875m/min. This design chooses a machine fourth-class, and the calculated flow is two streams. In this design, the "three blows two" system was used, in which two converters were in the production process. When one of the furnaces failed, there was one furnace instead of continuing production. In the design of each span of converter steelmaking, the width of the charging span is determined by two aspects: the converter capacity and its process layout, the width of which is 27m and the length is 120m. The width of the converter span is determined by the size of the furnace, and the length is equal to the length of the charge. The width of the continuous casting span is 30m and its length is 120m.