Process for the production of layered glass batch pellets
US4293324A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 1980 |
| Grant date | Oct 6, 1981 |
| Priority date | — |
| Expiry date | Feb 21, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C1/026
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Layered glass batch pellets are produced in a continuous process which comprises the steps of: PA0 (a) maintaining in the pelletizing zone of a rotary apparatus a moving bed of recycle pellets, PA0 (b) feeding sand and particles of a calcium oxide source into the pelletizing zone, PA0 (c) feeding a solution of sodium hydroxide into the pelletizing zone, the recycle pellets being coated with a layer comprised of the solution of sodium hydroxide, the sand and the calcium oxide source and forming layered pellets, PA0 (d) passing the layered pellets into a heated drying zone exposed to an atmosphere containing carbon dioxide gas, PA0 (e) lifting the layered pellets to the upper part of the drying zone and releasing the layered pellets to separately fall through the drying zone, PA0 (f) simultaneously absorbing carbon dioxide onto the layered pellets while evaporating and removing water from the falling layered pellets to form dried layered pellets, the dried layered pellets having a residual moisture content of less than 15 percent by weight, PA0 (g) passing the dried layered pellets from the drying zone to a recycle zone, PA0 (h) recycling a portion of the dried layered pellets to the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.