Method of heat treating articles
US4340433A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 16, 1980 |
| Grant date | Jul 20, 1982 |
| Priority date | — |
| Expiry date | Jan 16, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J8/1818
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to a method of heat treating articles which utilizes a fluidized bed comprising a container containing a mass of refractory particles and having a porous base, a layer of such particles adjacent to the porous base being formed of heavier particles than the remainder of said refractory particles. According to the invention, a non-stoichiometric fluidizing and treatment medium is supplied to the underside of the porous base and flows therethrough into the mass of refractory particles at such a velocity as to leave the heavier particles unfluidized while fluidizing the remainder of the particles. A gaseous medium is also introduced into the container at a position above and spaced from the porous base to together with the non-stoichiometric fluidizing and treatment medium, a combustible mixture which is ignited to heat the mass of refractory particles to a temperature at which the non-stoichiometric fluidizing and treatment medium will carry out the desired heat treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.