Method and apparatus for recycling top gas for shaft furnace
US10093996B2 · kind B2 · utility
3Cited by
1References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2015 |
| Grant date | Oct 9, 2018 |
| Priority date | — |
| Expiry date | Sep 28, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/143
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Method, apparatus and system for improved energy efficiency in a direct reduction iron production process which uses a direct reduction shaft furnace and syngas as the reduction gas. The method and system of the invention use a part of the top gas emanating from the shaft furnace as transport gas for the gasifier, and control the volume of the top gas used as recycled top gas or fuel for the gas heater. The present invention achieves high energy efficiency, and reduces the need to use additional CH4 source for the reduction gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.