Method for pretreating and improving coking coal quality for blast furnace coke
US7645362B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2004 |
| Grant date | Jan 12, 2010 |
| Priority date | — |
| Expiry date | Aug 5, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L9/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Methods for pretreating and improving coking coal quality for producing blast-furnace coke by: (a) rapid-heating the coal charge in a fluidized-bed to a temperature range between not lower than 300° C. and not higher than the temperature at which the coal charge begins to soften, at a rate of 30 to 103 ° C./min., (b) classifying the rapid-heated coal charge to fine- and coarse-size coal, and then (c-1) briquetting the fine-size coal or (c-2) rapid-heating the fine- and coarse-size coal individually in a pneumatic preheater to a temperature range between not lower than 300° C. and not higher than the temperature at which the coal charge begins to soften, at a rate of 103 to 105 ° C./min., and (d) forming the fine-size coal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.