气基竖炉直接还原技术的发展现状与展望

Prospect and Present Status of Gas-Based Shaft Furnace Direct Reduction Technology

阐述了气基竖炉直接还原工艺的技术特点和发展现状，分析了在中国资源和能源条件下气基竖炉直接还原技术发展所面临的主要问题。指出非常规天然气资源的有效开采和加压煤制气工艺投资、运行成本的显著降低，将是未来气基竖炉直接还原技术发展的主要推动力，同时利用钢铁企业过剩的煤气资源和中国局部地区相对丰富的天然气资源生产直接还原铁，是今后中国气基竖炉直接还原技术发展的重要方向。参照唐山地区的原料和能源价格，对年产量为80万t／a的直接还原铁装置的生产成本和技术经济可行性进行了分析。

The technical characteristics and developing present status of gas based shaft furnace direct reduction processes have been expounded and the major problems faced by gas-based direct reduction technology under the condition of China＇s resource and energy during technical development have been analyzed. It has been pointed out that a significant reduction in investment and operating costs of pressurized coal gasification technology and the effective exploitation of unconventional natural gas resource is the main driving force of the future development of gas-based shaft furnace direct reduction technology, while it is still another important direction of current gas-based shaft furnace development to produce DRI by taking advantage of the excess gas resources of steel plants and natural gas resource in some areas where the natural gas resource is relatively abundant. According to Tangshan region＇s raw material and energy prices, the production costs of DRI was calculated and the technical and economic feasibility was analyzed under the scale of 0.8 Mt/a.