Multi-mineral/ash benefication process and apparatus
US6666335B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2000 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Oct 28, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D21/2427
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
There is provided a method and apparatus for segregating ponded coal combustion materials for use in various products, such as block sand products, concrete or mid-size sand products and fine ash products. After screening ponded coal combustion raw materials to remove the first size material for use as a block sand product, the remaining material passes through a rotating magnetic separator to remove iron bearing materials and then to a hydraulic classifier for separating coarse materials, middling size materials and fine materials. The coarse materials are combined with the first size materials and are de-watered to form the block sand product. The middling size materials are segregated into low, middle and high specific gravity materials by the use of spirals. The low specific gravity material is passed through a sizing sleeve and coarse low specific gravity material is combined with the middle specific gravity material and are de-watered to form a concrete or mid-size sand product. Fines from the hydraulic classifier are screened to form the fine ash product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.