Preparation and utilization of slurry fuel with flotation tailing
Conference
·
OSTI ID:45098
- ICSC-World Laboratory, Lausanne (Switzerland)
- China Univ. of Mining & Technology, Beijing (China)
- Datun Coal Preparation Plant, Peixian (China)
Most coal preparation plants treating metallurgical coal employ flotation process for recovering concentrate from -0.5mm fraction. For full utilization of combustibles, the common practice of flotation operation is to give a relatively low ash concentrate while leaving a medium ash tailing as an inferior fuel. In this case, the dilute flotation tailing is thickened and dewatered, giving a filtering cake containing about 20-30% moisture as the final product. Difficulties are confronted in handling of this sticky mass. Besides, combustion of such high-moisture inferior fuel would be less efficient and more pollutant. Ways have been sought to solve these problems. Conversion of such dewatered flotation tailing into slurry fuel is one of possible options in view of its good handleability and high efficiency of carbon burnout in combustion even in small outfits. In Chinese situation, a coal mine area always includes population points and associate utilities and consumes about 5% of coal produced, some of which should be of good quality. Clean and efficient usage of such coal sludge in-situ will be of benefit to the mine in that locally consumed coal could be substituted, which can be in turns loaded out as regular commodity or joining with the main stream to coal preparation plant for production of more premium coal. Datun Coal Preparation Plant employs jig-flotation process and produces concentrate for coking plants. It has a designed annual capacity of treating 1.8 Mt feed coal and the highest record of operation was 2.1 Mt. Average yield of flotation tailing in recent years is 3.5%. Economy would be the prime importance to be considered for converting this sludge into slurry fuel, as preparation of coal slurry is usually considered to be expensive.
- OSTI ID:
- 45098
- Report Number(s):
- CONF-930413--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Centrifugal dewatering and reconstitution of fine coal by the GranuFlow Process
Closed-water circuitry of a coal preparation plant with jig-flotation process
Method of recovering and dewatering coarse sludge. [Magnitogorsk Integrated Iron and Steel Works-USSR]
Conference
·
Tue Dec 30 23:00:00 EST 1997
·
OSTI ID:324633
Closed-water circuitry of a coal preparation plant with jig-flotation process
Conference
·
Thu Dec 30 23:00:00 EST 1993
·
OSTI ID:45124
Method of recovering and dewatering coarse sludge. [Magnitogorsk Integrated Iron and Steel Works-USSR]
Journal Article
·
Wed Dec 31 23:00:00 EST 1980
· Coke Chem. USSR (Engl. Transl.); (United States)
·
OSTI ID:6081899