首钢京唐钢铁公司绿色低碳钢铁生产流程解析

中国钢铁行业面临着资源能源短缺、市场盈利下降和生态环境制约三个方面的压力与挑战，在低碳循环经济成为当前社会发展主趋势的情况下，钢铁企业需要向低碳、绿色生产的方向转型升级。以京唐钢铁公司2015年上半年的生产调研为基础，计算京唐钢铁公司生产过程的能耗、CO2排放情况，并对钢铁生产过程能量流运行、废弃物处理与能源转换情况进行分析，为其他钢铁企业减少CO2排放、节约能源、保护环境提供一个参照。研究表明，京唐钢铁公司吨钢综合能耗为604.5 kg，吨钢CO2排放为2.165 t，与产品结构相类似的宝钢和武钢相比，能耗水平位于行业先进水平；基于钢铁生产的能量流分析表明，京唐钢铁公司通过采用干熄焦发电、煤气干法除尘、TRT余压发电等先进技术，实现吨钢余热余能回收136.26 kg，余热余能回收率为48.31%，高出全国平均水平10.89%；京唐钢铁公司基于循环理念，建立高效的煤气-电能转换中心和余热蒸汽回收利用中心，基本实现了煤气资源、固体废弃物资源、水资源的循环利用与废水零排放，生产过程中SO2、NO2、粉尘的全面达标排放。

Green low-carbon analysis of iron and steel manufacturing process of Shougang Jingtang Iron and Steel Company

Resources and energy shortages,market declining profitability and ecological and environmental constraints have become three aspects of the pressures and challenges in China's steel industry. Low-carbon and circular economic became the main trends in current social development,and iron and steel enterprises should upgrade to the direction of low-carbon and green steel production. This paper was based on the production survey in the first half of 2015 year in Shougang Jingtang Company. Energy consumption and CO2 emissions in the steel production process were calculated. The energy flow operation,waste treatment and energy conversion in iron and steel production process were analyzed. Also,references were provided for other steel companies to reduce carbon dioxide emissions,save energy and protect environment. Studies had shown that comprehensive energy consumption and CO2 emissions for per ton of steel were 604.5 kg and 2.165 t,respectively. Compared with Baosteel and Wuhan Iron and Steel with similar product structure, the energy level of Jingtang Steel located in the advance level. Based on the energy flow analysis of steel production, Shougang Jingtang Company used the CDQ,TRT and other advanced technology. The waste heat and energy recovery achieved 136.26 kg/t steel,and the recovery rate of waste heat and energy was 48.31%,which was 10.89%higher than the national average value. Based on the cycle thought,Shougang Jingtang Company established the efficient gas-elec-tric energy conversion center and steam heat recycling center,and basically realized zero emissions and comprehensive utilization of coal gas,solid waste and water resources and discharged SO2,NO2 and other pollutants.