2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 6: Yagi Intl. Symp. / Metals & Alloys Processing
| Editors: | Kongoli F, Akiyama T, Nogami H, Saito K, Fujibayashi A |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 480 pages |
| ISBN: | 978-1-987820-46-1 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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An Iron-Slag Bath for Hot Metal Smelting Reduction and Coal Gasification
Yibo He1; Yingxia Qu2; Zongshu Zou1;1NORTHEASTERN UNIVERSITY, Shenyang, China; 2, Shenyang, China;
Type of Paper: Regular
Id Paper: 33
Topic: 3
Abstract:
Iron bath smelting reduction can conceptually produce hot metal with flexible raw materials such as ordinary iron ore fines and coal fines. There is, however, the issue of Post-Combustion Ratio (PCR) control in the Smelting Reduction Vessel (SRV). A PCR as low as possible is desirable for effective reduction of iron ore, but leading to a high coal consumption for heat supply. The ˇ°clean useˇ± of coal via converting into gas fuel is now also a ˇ°hot spotˇ± particularly in China. The current coal gasification processes have however the issue of difficult and water-consuming gas cleaning and tar treatment resulted from low-temperature gasification. Therefore, an iron-slag bath with three levels of coal/oxygen injection for simultaneous hot metal smelting reduction and coal gasification is proposed. A progressive zoned model is developed to calculate the heat and mass balances of the SRV and the overall process with ore pre-heating(reduction) and gas reforming units. The calculation results show that, with such a coal/oxygen injection design, not only the simultaneous hot metal production and coal gasification can be easily realized by maximum energy utilization within the process flow by applying a proper PCR in the SRV with corresponding coal/oxygen injections, but also the production capacities of hot metal and coal gasification can be flexibly combined with varying market supply and demand.
Keywords: smelting reduction, hot metal production, coal gasification, post combustion