Process and apparatus for producing cellulated vitreous refractory material in prescribed shapes and products therefrom
US4190416A · kind A · utility
Inventor
Key dates
| Filing date | Mar 20, 1978 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Mar 20, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27M2001/16
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The apparatus includes a plurality of extruders which feed parallel streams or ribbons of raw material or charge along rollers through successive chambers in a kiln and through an annealing lehr to zones where the material is cut. The surfaces of the raw material are coated on three sides with a parting or releasing agent and, on the side to be exposed, with a glaze or engobe, or left uncoated. The firing chamber of the kiln has opposed rows of fuel burners on the sides directed toward ports on the other side and refractory rollers which protrude through the side walls and are supported on circumferentially spaced wheels. Wheels between adjacent ends synchronize rotation of the rollers. Manifolds feed the stack gases from the firing chamber into the preheating chamber. The process includes using charges which are either a mixture of a small amount of soluble carbonaceous material and water to adjust the carbon and moisture content of the clay or silica with carbonaceous material and water. If the charge is clay, it is then extruded as ribbons, coated with releasing agent and glaze or engobe, then dried, preheated, sintered, fired at above about 2000.degree. F. and annealed. Cellula…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.