Method for continuously manufacturing non-fired pellets
US4636342A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1984 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | Feb 10, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B1/2413
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method and an apparatus for continuously manufacturing non-fired pellets, which comprise: continuously supplying green pellets containing a carbonating binder into a vertical type reactor to continuously pass the green pellets sequentially through a predrying zone, a carbonating zone and a drying zone in the vertical type reactor; blowing a predrying gas having a relative humidity of up to 70% and a temperature of from 40.degree. to 250.degree. C. into the predrying zone to predry the green pellets therein until the water content of the green pellets in the predyring zone falls within the range of from 1 to 7 wt. %; blowing a carbonating gas comprising carbon dioxide gas of from 5 to 95 vol. % and saturated steam of from 5 to 95 vol. % and having a temperature of from 30.degree. to 98.degree. C. into the carbonating zone to carbonate the carbonating binder contained in the green pellets therein; and blowing a drying gas at a temperature of from 100.degree. to 300.degree. C. into the drying zone to harden the green pellets therein, thereby continuously manufacturing non-fired pellets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.