Gas fired particulate melting apparatus and method
US4781171A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1987 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | Jul 6, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D2099/0056
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A liquid fuel fired apparatus and method for the efficient distribution and utilization of heat in the melting of a particulate feedstock. The feedstock is preheated to an incipient softening point temperature in a vertically disposed shaft. The column of feedstock in the shaft is supported on the top of a freestanding pile of feedstock disposed on the floor of a surrounding melting chamber having downwardly diverging sidewalls. Liquid fuel burners direct hot combustion products towards and around the base and intermediate portions of the feedstock pile causing the outside of the pile to be melted. Gas at a temperature below the softening point temperature of the feedstock is introduced around the top of the pile to prevent the hot gases in the lower portion of the melting chamber from prematurely melting the feedstock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.