Development of techniques for processing flotation wastes and slurries
This article describes experience in the use of centrifugal flocculation with new polymeric flocculants and of filter presses for treatment of slurry-flotation wastes. The development of a closed aqueous-slurry cycle in which flotation wastes are processed remains a pressing problem at coal washeries. A single-stage aqueous-slurry system has been in operation at the Saranskaya Washery since 1974. Introduction of this unit made it possible to eliminate the practice of discharging energy-containing slurries into outdoor settling tanks; the resultant annual savings has been about 400 thousand rubles. Further improvement of the aqueous-slurry system is proceeding in the direction of closing the cycle within the washery building, dewatering the flotation tailings so that they become transportable. Centrifugal-flocculation units are recommended by the IOTT for dewatering of flotation tailings. A necessary condition for the use of filter presses to dewater flotation tailings at Soviet coal washeries is the design and introduction of large-scale automated and mechanized units with vertical plates and high throughput levels. An experimental model of a fully automated diaphragm-type frame filter press (FRAM-200) with vertical plates and individual continuous filter-cloth belts has been built and installed at the Sukhodol'skaya Washery. An experimental model of a segmental diaphragmless filter press (FK-600) with a filtration surface of 600 m/sup 2/ is under development. Improvement of centrifugal-flocculation units and introduction of Soviet-produced, large-diameter filter presses will afford a real opportunity for production of transportable flotation wastes and slurries and for closing of the aqueous-slurry systems at coal washeries.
- OSTI ID:
- 5888547
- Journal Information:
- Coke Chem., USSR (Engl. Transl.); (United States), Journal Name: Coke Chem., USSR (Engl. Transl.); (United States) Vol. 7; ISSN COKCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
CARBONACEOUS MATERIALS
CENTRIFUGATION
CLOSED-CYCLE SYSTEMS
COAL
COAL PREPARATION
COMMINUTION
DISPERSIONS
ENERGY SOURCES
EUROPE
FILTRATION
FLOCCULATION
FLOTATION
FOSSIL FUELS
FUELS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYAMIDES
POLYMERS
PRECIPITATION
REMOVAL
SEPARATION PROCESSES
SLURRIES
SURFACE PROPERTIES
SUSPENSIONS
USSR
WATER REMOVAL