Mixing system for separation of materials by flotation
US6109449A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1998 |
| Grant date | Aug 29, 2000 |
| Priority date | — |
| Expiry date | Nov 4, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F27/192
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A mixing system in a tank provides a flotation cell for froth collection of minerals such as metallic ores thereby separating such ores from other materials with which they are mined and enabling a concentrated ore component to be collected. The mixing system maintains particles containing the ores in a circulating liquid suspension in a contact zone where bubbles are discharged. Ore particles are attracted and attached to the bubbles. The bubbles rise and float to the top of the liquid for collection of the concentrated ores. The mixing system includes a radial flow impeller and an axial flow impeller which are attached for rotation on a common shaft, with the axial flow impeller below the radial flow impeller. The radial flow impeller is disposed in a space between a disc, which rotates with the radial flow impeller and another disc which is stationary, and may be a flange of a pipe around the shaft and extending above the surface of the liquid. Air or other suitable aeration medium is brought, either under pressure or by suction created by the radial flow impeller, into the space. The aeration medium is radially discharged in the form of bubbles. The axial flow impeller is downw…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.