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| Current Status and Prospects of Gas-Based Shaft Furnace Direct Reduction Technology |
| ZHANG Fu-ming,CAO Chao-zhen,XU Hui |
| Beijing Shougang International Engineering Technology Co., Ltd., Beijing 100043, China |
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Abstract The technical characteristics and current status of gas-based shaft furnace direct reduction process have been expounded and the major problems faced by gas-based direct reduction technology development under China’s resource and energy condition have been analyzed. Based on the characteristics of the gas-based shaft furnace direct reduction process, analysis of raw materials and reduction gases of this technology have been undertaken. 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; meanwhile 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 the raw material and energy prices in Tangshan region, the production costs of DRI has been calculated and the technical and economic feasibility has been analyzed under the scale of 0.8Mt/a. The results show that the effect of price fluctuations of raw materials on the DRI costs is significant, and the reducing gas accounts for about 10 %-25 % of DRI total costs. If considering the economic benefits of using DRI instead of scrap in converter, the natural gas price should be lower than 1.8yuan/m3.
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Received: 05 December 2013
Published: 28 March 2014
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2014, Vol. 49 
