| 摘要 |
<p>The invention relates to a method for increasing the concentration of platinum group metals in urban waste material. The method comprises obtaining particles of urban waste material; screening the particles of urban waste material by size,- selecting particles of urban waste material that lie within a defined size range; and processing the selected particles using at least one physical or chemical technique whereby to increase the concentration of platinum group metals to at least 5ppm. The invention also relates to an apparatus for increasing the concentration of platinum group metals in particulate urban waste material. The apparatus comprises: a drying unit (4), a particle size screening unit (5); and one or more processing units for effecting platinum group metal concentration of the particulate urban waste material by physical and/or chemical techniques, in particular a magnetic separation unit (7) and a froth flotation cell (9).</p> |
