آخرین محصولات
Evolutionary Development for Electrokinetic Dewatering of …
Abstract. The processing and storage of phosphatic clay suspensions (or mine tailings) which result as a waste product from phosphate mining industry represent an important economic and ...
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Phosphatic waste clay: Origin, composition, physicochemical properties
Efficient continuous electrokinetic dewatering of phosphatic clay suspensions. Electrochim. Acta (2019) C.R. Edwards et al. ... Phosphatic clay is a waste material produced during the beneficiation of phosphate ore, which likely poses severe environmental problems. In this study, a phosphatic clay containing 258 ppm of total …
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Mathematical Model and Optimization of Continuous Electro …
Request PDF | Mathematical Model and Optimization of Continuous Electro-Osmotic Dewatering | A dilute 2-3 wt.% suspension of phosphatic clay is produced as a waste stream in the beneficiation of ...
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Large-Scale Dewatering of Phosphatic Clay Waste From …
The Bureau of Mines has tested a dewatering technique for phosphatic clay waste. The technique utilizes a flocculant, polyethylene oxide (PEO), that forms strong, stable flocs that can be dewatered on a static screen followed by further dewatering on a …
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Semi-Continuous Electrokinetic Dewatering of Phosphatic Clay
A mathematical model was developed for continuous electrokinetic dewatering of phosphatic clay, a clay-water suspension generated as an effluent from processing of phosphate ores. The model ...
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US5262064A
A method of dewatering mineral-containing phosphatic clay sludge comprising adding to the sludge (a) an aqueous solution or emulsion of acrylamide polymer flocculating agent and (b) a microfiber additive. By using this method, such mineral-containing sludges can be quickly dewatered into a cake comprising 25-35% solids which can then be further …
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Chemical Engineering at the University of Florida
Clay settling and dewatering : ... "State-of-the-art of phosphatic clay dewatering technology and disposal techniques", FIPR Publication #02-017-021, Florida Institute of Phosphate Research Bartow, FL, 1983. [ii] H. El-Shall, Development and Evaluation of a Rapid Clay-Dewatering (FIPR-DIPR) Process as a Reclamation Technique, FIPR ...
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DESIGN OF ELECTROLYTIC DEWATERING SYSTEMS …
6-1 X-ray diffraction pattern generated from an oriented aggregate mount of a phosphatic clay sample. Peaks are identified with their associated clay or sand mineral. . . . . . . . 51 6-2 Schematic of bench-top cell with labeled locations of the electrodes and the tempera-ture and voltage measurements.
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Evolutionary Development for Electrokinetic Dewatering of …
A semi-continuous electrokinetic dewatering process, representing an intermediate step in development of a technology for continuous electrokinetic dewatering of phosphatic clay suspensions, was ...
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Large-Scale Dewatering of Phosphatic Clay Waste from …
Actions: Download Large-Scale Dewatering of Phosphatic Clay Waste from Polk County, FL. PB86229564
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Consolidating Waste Slurry by Vacuum Preloading with …
The site area was 50 000 m2, and the soft clay treated was about 20 m thick, including a very soft muddy clay layer 4-5 m thick, formed from dredged slurry. The water contents of the clays were ...
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A Novel Technique for Water Recovery and Land Reclamation …
A dewatering technique for phosphatic clay waste utilizes polyethylene oxide (PEO) that forms strong, stable flocs that can be dewatered on a static screen followed by further dewatering on a ...
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State-of-the-Art of Phosphatic Clay Dewatering and Disposal …
They include the Estech sand-clay mix process using the Enviro-Clear thickener, sand-clay sandwiching, dredge mix, dredge process, and the sand-spray process. Developing technology for dewatering phosphatic clays also is described, including the Bureau of Mines rotary trommel method and the Gardinier process.
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State-of-the-Art of Phosphatic Clay Dewatering and …
02-017-021Final. Abstract. This Bureau of Mines study surveys the current state of technology and the various research efforts that have been undertaken to dewater the …
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(PDF) Phosphatic waste clay: Origin, composition, …
The daily growing demand for critical materials has further highlighted the importance of secondary sources such as industrial waste streams. Waste clay, a phosphate ore process tailing, contains a remarkable amount of critical materials such as P and REEs so that comparing to different phosphate ore process streams, waste clay presents the highest …
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Phosphatic-Clay
Engineering evaluation of waste phosphatic clay for producing low permeability barriers. Integrating Control of Flocculant Delivery in a Phosphatic Clay Thickening Circuit; …
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Dewatering of Mineral Waste Using the Flocculant …
ing technique on a variety of phosphatic clay wastes. The flow sequence for the trailer-mounted F TU is shown in figure 7. In addition to the dewatering screens, the unit in- cludes a system for making PEO solutions; holding tanks for PEO solutions, slimes, and makeup water; a stirred vessel for mixing PEO solutions with the clay waste; and
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A Review of Phosphatic Clay Dewatering Research
A Review of Phosphatic Clay Dewatering Research. Walter E. Pittman, Jerry T ... slurries clay solids clay wastes companies concentrate consolidation continued costs covered cuts determine developed dewatered clay dewatering difficult dilute disposal effect Enviro-Clear equipment Estech evaluated feed field FIGURE final FIPR flocculant flocs ...
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Clay Dewatering – Clay Flocculation – Settling
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Semi-Continuous Electrokinetic Dewatering of Phosphatic Clay
A semi-continuous electrokinetic dewatering process, representing an intermediate step in development of a technology for continuous electrokinetic dewatering of phosphatic clay suspensions, was designed and evaluated through measurement of supernatant turbidity, pH, and changes in solids content.
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State-of-the-Art of Phosphatic Clay Dewatering and …
The effective use of sand tailings is also encouraged to promote further consolidation of clays via self-weight stressing, sand/clay admixtures and/or surcharging sand caps. FIPR …
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A Novel Technique for Water Recovery and Land …
FIPR/DIPR process, phosphatic clay is treated with a flocculant (at about a pound per ton of clay) and 5% waste paper pulp followed by dewatering on an inclined screen.
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Advances and challenges of electrokinetic dewatering of
Kong and Orazem [23, 66] developed a horizontal semicontinuous prototype for dewatering phosphatic clay and demonstrated semicontinuous production of low-turbidity supernatant and dewatered cake, which led to the development of a fully continuous electrokinetic prototype capable of generating a pseudo-plastic wet cake at a rate of 1.4 …
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Canberra IP
An Applied Low Voltage Electrical Field Enhances the Rate of Clay Dewatering, Hastening Clay Settling Pond Land Reclamation . Continuous operation of this electrokinetic dewatering system removes water from phosphatic clay suspensions, thereby achieving clay cake solid contents approaching 25 percent more rapidly than other methods.
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STATE-OF-THE-ART OF PHOSPHATIC CLAY …
The research described includes early dewatering experiments, fundamental studies of clays and of flocculation,and minor dewatering techniques. These include …
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DESIGN OF ELECTROLYTIC DEWATERING …
For example, recently, electrokinetic methods have been demonstrated for dewatering of soil,11mine tailings,4,12sludge,13and clay,14–16including Florida phosphate clay.17The …
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Advances and challenges of electrokinetic dewatering of
The development of electrokinetic dewatering technologies for clay and soil materials has steadily advanced for over 100 years. A review of the origins, important contributions, and recent work on the topic are presented. Research into the electrokinetic mechanisms have informed the design process and resulted in prototypes and pilot-scale ...
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Large-Scale Dewatering of Phosphatic Clay Waste from Polk …
The Bureau of Mines has tested a dewatering technique for phosphatic clay waste. The technique utilizes a flocculant, polyethylene oxide (PEO), that forms strong, stable flocs that can be dewatered on a static screen followed by further dewatering on a rotary screen or trommel. In field tests conducted in central Florida, clay wastes containing ...
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De-sliming followed by froth flotation for the recovery of …
Process for dewatering and utilization of mining wastes. Miner. Eng. (2004) R. Karunanithi et al. Phosphorus recovery and reuse from waste streams ... recovery of rare earths, phosphorus and uranium from Florida phosphatic clay. Miner. Metall. Process. (2017) View more references. Cited by (1) Recovery of Rare Earth Elements Minerals in …
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Efficient continuous electrokinetic dewatering of …
The initiative has spurred the development of enhanced dewatering technologies for phosphatic clay. Electrokinetic separation of phosphatic clays is an attractive method because the clay particles are charged and move under the …
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