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在简要叙述热处理炉型基础上,介绍了包钢3800 mm中厚板热处理生产线的工艺流程,并对辐射管加热辊底式热处理炉先进应用实例进行详细叙述。全炉分为24个温度控制区,采用分段预置模块式炉体、ON-OFF脉冲控制自预热式烧嘴和无水冷耐热钢辊等,使钢板烧损率比传统炉型降低3%,单位燃气消耗量降至1373 kJ/kg,年节约成本400余万元,采用可靠性高的SIEMENS S7 400自动控制系统和PCS 7可编程序软件,对热处理过程进行在线优化及管理,使钢板任意点出炉温度与目标温度偏差小于15℃,长度和宽度方向上温差小于±10℃。该炉自投产以来,月最高产量达到2.3万吨,远超原设计目标,热处理钢板合格率达到98%以上。
On the basis of a brief description of the heat treatment furnace, the technological process of Baosteel 3800 mm plate heat treatment production line is introduced, and the advanced application examples of the heat pipe roller hearth heat treatment furnace are described in detail. The furnace is divided into 24 temperature control zones, the use of sub-preset modular furnace body, ON-OFF pulse control from the preheating burner and cold water-resistant heat-resistant steel roller, so that the steel burning rate lower than the traditional furnace 3%, unit gas consumption dropped to 1373 kJ / kg, the annual cost savings of more than 400 million, using high reliability SIEMENS S7 400 automatic control system and PCS 7 programmable software, heat treatment process online optimization and management, so that steel Any point out of the furnace temperature and the target temperature deviation of less than 15 ℃, the length and width of the temperature difference less than ± 10 ℃. The furnace has been put into operation, the highest monthly production reached 2.3 million tons, far beyond the original design goals, heat-treated steel pass rate of 98% or more.