Process for operating a blast furnace
US4421553A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1981 |
| Grant date | Dec 20, 1983 |
| Priority date | — |
| Expiry date | Mar 24, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21B5/006
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In a method of controlling a blast furnace wherein iron ore is reduced to form pig iron and there being at least one reactor used for heating a reducing gas which reducing gas is introduced to at least one tuyere, the improvement being the steps of adjusting the composition and the temperture of the reducing gas in order to control at least one of the following: coke rate, productivity of the blast furnace, temperature and/or silicon content of the pig iron, and temperature of the top gas. Preferably, the reactor is a plasma torch and the temperature of the reducing gas is in the range of 1500.degree.-2800.degree. C. The coke rate is predetermined at a value of 50-350 kg/mt of pig iron and preferably at 80-200 kg/mt of pig iron produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.