Layered glass batch pellets and apparatus for their production
US4418153A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 1982 |
| Grant date | Nov 29, 1983 |
| Priority date | — |
| Expiry date | Jul 28, 2002 |
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 carbonate source into the pelletizing zone, PA0 (c) feeding a Na.sub.2 O source comprised of 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 carbonate source and forming layered pellets, PA0 (d) passing the layered pellets into a heated drying zone to form dried layered pellets, the dried layered pellets having a residual moisture content of from about 4 to about 12 percent by weight, PA0 (e) passing the dried layered pellets from the drying zone to a cycle zone, PA0 (f) recycling a portion of the dried layered pellets to the pelletizing zone as the recycle pellets, and PA0 (g) recovering a portion of the dried layered pellets from the recycle zone. The novel layered glass batch pellets produced are of a homogeneous composition in which the segregation of the Na.sub.2 O is minimized. The layered pellets are non-cohesiv…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.