FIELD: process engineering.
SUBSTANCE: invention relates to coal-containing products separation and classification, particularly, wastes of thermal electric power stations. Proposed method comprises hydraulic classification of coal-containing product to slag and fly ash according to boundary class of 0.25 mm. Fly ash is separated before flotation into two fractions, according to boundary class of 0.05 mm, each fraction being conditioned by collector and foaming agent. Flotation is performed using column apparatus. Note here that flotation of 0.05 mm-class is performed in direct-flow section of column apparatus while flotation of fraction below 0.5 mm-class is performed in counterflow section. Slag is directed for grinding for cement production. Integrated concentrate of flotation in both sections is dewatered and directed for combustion as a fuel. Wastes of said both flotation sections are dewatered and used for cement production.
EFFECT: higher process efficiency.
4 cl, 1 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF EXTRACTING UNBURNED CARBON FROM TPP FLY ASH | 2018 |
|
RU2692334C1 |
| METHOD OF DRESSING COAL SLIME | 2008 |
|
RU2428258C2 |
| METHOD OF CONTROLLING THE PROCESS OF FLOTATION | 0 |
|
SU1389854A1 |
| METHOD OF PRODUCING POTASSIUM CHLORIDE | 2010 |
|
RU2457180C2 |
| METHOD AND PROCESS LINE FOR PROCESSING OF ASH AND SLAG WASTES FROM DUMPS OF HYDRAULIC ASH HANDLING SYSTEM IN THERMAL POWER PLANTS | 2008 |
|
RU2363885C1 |
| METHOD OF AUTOMATIC CONTROL OF FLOTATION PROCESS | 0 |
|
SU1066654A1 |
| METHOD OF PROCESSING TECHNOGENIC CARBON-CONTAINING RAW MATERIALS | 2018 |
|
RU2685608C1 |
| METHOD FOR PROCESSING OF WASTE OF HEAT ELECTRIC POWER PLANTS | 1997 |
|
RU2129470C1 |
| METHOD OF SEPARATION OF CENOSPHERES OF FLY ASHES OF THERMAL POWER STATIONS | 2001 |
|
RU2212276C2 |
| METHOD OF COMPLEX DRY PROCESSING OF FLY ASH AND TECHNOLOGICAL LINE FOR PROCESSING OF FLY AREA | 2017 |
|
RU2665120C1 |
