设计总说明：现如今，一般规模较小的炼钢厂都是用电弧炉来进行炼钢。本次设计的目标是对一个年产量为30万吨的板坯电弧炉的炼钢车间的进行车间工艺设计，通过在图书馆和计算机房查找翻阅资料，然后结合公式进行计算，来确定车间的各个部分的尺寸，在熔池的尺寸中，熔池直径为4.052m，熔池容积为6.44m3，同时对熔池容积进行校准，保证设计的合理性和准确性。一旦计算出的结果不合理那么就要重新进行直到数据合理，出钢倾翻角β为14°，取出钢口直径为150mm，可以使出钢更快。由计算得到变压器的功率为40000kV∙A，电极的直径为400mm，通过对炉墙的使用寿命和炉料熔化难易程度综合考虑计算得出电极圆心直径为1216mm。对于炼钢过程中的物料平衡以及热平衡的计算均选取100kg铁水为例，然后计算后得出结果。本设计中选用的精炼炉为AOD精炼炉，其公称容量为40吨。在连铸机的设计中，钢包允许的最大浇筑时间为50mins，铸坯的断面宽度为150mm，长为1000mm。他的工作拉速通过计算得出为1.07m/min，因为计算得出流数为一流，所以本设计选用一机一流的连铸机。电弧炉车间整体采用横向高架式布置，各个跨的跨间设计中，原料跨跨度27米，长度为180米，主要由各种原料的堆放区决定；

炉子跨跨度24米，长度为180米，主要是由电弧炉大小和工艺布置决定；精炼跨跨度21米，长度为180米，主要由精炼炉大小决定；连铸跨跨度33米，长度为180米，主要由连铸机机器数量和流数已经工艺布置决定；出坯跨跨度21米，长度为180米，由出坯尺寸和坯料的存放空间决定。原材料废钢的选择应当严格满足各项要求，同时设计中还会涉及一些耐火材料的运用等。本设计采用的工艺是有较大发展余地且比较先进的短流程工艺：废钢→超高功率电弧炉→AOD炉精炼→连铸。设计方案以效益高、技术新为原则，充分体现了灵活、先进、多功能等特点，具备很好的可持续发展性。

关键词： 超高功率电弧炉；AOD精炼炉；工艺设计

Process design of 300 thousand tons o f slab electric arc furnace Design General Information：Nowadays, the smaller scale steelmaking plants use electric arc

furnace to make steel. The aim of the design is to design the workshop process of a steelmaking workshop of a slab arc furnace with a annual output of 300 thousand tons. Through the search of the data in the library and the computer room, and then the calculation with the formula, the size of the various parts of the workshop is determined. In the size of the molten pool, the pool diameter is 4.052m, the molten pool is in the pool. The volume is 6.44m3, and the volume of the molten pool is calibrated to ensure the rationality and accuracy of the design. Once the calculated results are not reasonable, it will be renewed until the data is reasonable. The tapping angle beta is 14 degrees and the diameter of the steel mouth is 150mm, which can make the tapping faster. It is calculated that the power of the ransformer is 40000 kV∙A and the diameter of the electrode is 400mm. The diameter of the center of the electrode is 1216mm through the comprehensive consideration of the service life of the furnace wall and the difficulty of the melting of the furnace. For the calculation of material balance and heat balance in steelmaking process, 100kg molten iron is chosen as an example, and then the result is obtained after calculation. The refining furnace selected in this design is AOD refining furnace, and its nominal capacity is 40 tons. In the design of continuous casting machine, the maximum pouring time of ladle is 50mins, the width of slab is 150mm, and the length is 1000mm. The speed of his work is calculated to be 1.07 m/min, because the flow number is calculated to be the first class, so the design adopts a first-class continuous casting machine. The electric arc furnace workshop has a horizontal elevated layout. In the inter span design, the span span is 27 meters and the length is 180 meters. It is mainly  etermined by the stacking area of various raw materials. The span of the furnace is 24 meters and the length is 180 meters, mainly determined by the size of the arc furnace and the layout of the process; the refining span is 21 meters and the length is 180 meters. It is mainly determined by the size of the refining furnace; the span of the continuous casting is 33 meters in span and 180 meters in length. It is determined mainly by the number and the flow number of the continuous casting machine. The span of the billet is 21 meters and the length is 180 meters, which is determined by the size of the billet and the storage space of the blank. The selection of raw materials scrap steel should strictly meet all requirements, and at the same time, some refractory materials will be used in the design. The technology adopted in this design is a relatively short process with relatively large development space and advanced technology: scrap steel to super high power electric arc furnace, AOD furnace refining to continuous casting. The design scheme is based on the principle of high efficiency and new technology, fully embodies the characteristics of flexibility, advanced and multi-function, and has good sustainable development.