Process and apparatus for treating particulate matter
US6475462B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2000 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Mar 28, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides a process for treating a particulate material, in which particles of the material to be treated interact with non-static particles of a second material, the process comprising the steps of: (i) providing a processing chamber (1) having an inlet (7) and an outlet (10) spaced downstream therefrom, the base (15) of said chamber comprising a plurality of outwardly radiating inclined vanes (20, 25), (ii) providing a host bed of particles (30) which include inert particles, alumina, limestone and activated carbon in the chamber (1) and generating a flow of fluid through the vanes (20, 25) at the base (15) of the processing chamber such that the bed of host particles (30) circulates about an axis of the chamber in a compact band, (iii) injecting particles of the material to be treated including sulphide ore, kaolin, gypsum and talc through an inlet (5) of the chamber (1) to contact with the circulating bed of the host particles (30), wherein the relative terminal velocity of the particles to be treated (45) and the host particles (30) is such that there is little or substantially no migration of the host particles to the outlet (10), and wherein substantiall…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.