| Popis: |
In the past there was often valid economic justification for not processing the ultrafine coal fractions and it was common to simply discard them as tailings. The trend is now to extract as much coal value as possible in the preparation process across all size ranges and to optimise performance and recovery. In addition, social, environmental and legal pressures to address concerns over power and water conservation drive incentives to maximise coal value recovery. The issues associated with processing, dewatering and handling of fine coal and reject streams are complex and significant and call for better management solutions to qualify admission of fine coal into products. These include, maximised solids capture, improved operating performance, reduced water consumption and increased water recycling. The development of alternatives to existing processing and dewatering technologies along with the better understanding of existing processes are essential to achieving better ultrafine ( |
