clay dewatering phosphatic
- صفحه اصلی
- clay dewatering phosphatic
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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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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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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This work focuses on the dewatering of phosphatic clay waste of Egyptian Abu‐Tartur phosphate ore by flocculation using polyacrylamides to enhance the dewatering rate and recycling of the process water. The experimental program includes sieving, hydrocyclone separation and flocculation of the overflow of hydrocyclone. Results …
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The Institute has funded research addressing issues and topics such as current mining practices; pipeline and pump design; matrix transportation; online sensors to analyze phosphate materials; land use evaluation and planning; flotation efficiency; dolomite separation; dewatering of phosphatic clay; and process control.
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36. Abstract. This Bureau of Mines study surveys the current state of technology and the various research efforts that have been undertaken to dewater the dilute phosphatic clays generated in the production of phosphate rock. The research described includes early dewatering experiments, fundamental studies of clays and of flocculation, and ...
به خواندن ادامه دهیدTests were made using a sample of phosphatic clay waste containing 4.74 percent solids to determine the effect of rotational speed of the trommel on dewatering. The trommel was inclined at 3.2° from the …
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A single-stage design was developed for continuous electro-osmotic dewatering of phosphatic clay suspensions that demonstrated efficient production of a …
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1. Introduction. Clay minerals (e.g. montmorillonite and kaolinite) are common waste products in the mining industry and have diverse structural and physical properties, such as anisotropic shape, large surface area, and varying types of charges (McFarlane et al., 2005).When dispersed in an aqueous media, the clay minerals exhibit a low …
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In-house research has shown that when small amounts of fibrous materials and flocculant are mixed with a phosphatic clay slurry, very rapid dewatering of the clays occurs. The …
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To date, no "universal" solution exists for the ultimate disposal of phosphatic clays. This report examines the fundamental state of conventional clay disposal technology and …
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Art of Phosphatic Clay Dewatering Technology and Disposal . Techniques: A Review of Phosphatic Clay Dewatering . Research. Florida Institute of Phosphate Research. Pub. No. 02-017-021.
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Abstract. This work focuses on the dewatering of phosphatic clay waste of Egyptian Abu-Tartur phosphate ore by flocculation using polyacrylamides to enhance the dewatering rate and recycling of ...
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begin the process of dewatering and consolidation. The phosphatic clays are not pure clays but also contain fine, unrecoverable particles of the phosphate mineral (apatite), ... IMC-P2 phosphatic ...
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The initiative has spurred the development of enhanced dewatering technologies for phosphatic clay. Electrokinetic separation of phosphatic clays is an …
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Since its inception, the Florida Institute of Phosphate Research (FIPR) has been pursuing an economical, practical, and environmentally-sound technique for dewatering phosphatic clays. In-house research has shown that when small amounts of fibrous materials and flocculant are mixed with a phosphatic clay slurry, very rapid dewatering of the ...
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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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1. additional dewatering expenses incurred due to the quantities of water exceeding those originally. expected. 2. expenses incurred for additional installations and facilities for the discharge ...
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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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Sand-Clay Mix: An Alternate . Phosphatic Clay Technology. Sand tailings and phosphatic clay materials can either be . returned to the landscape in separate streams or mixed together before being used as backfill material. When typical CSA methodology is used, clays at 3% solids are pumped into the area. The area will usually have been
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The results were used to explain the effect of pH on fabric formation and water retention in smectite-rich phosphatic dispersions. The clay microstructures formed during electrokinetic dewatering process were then studied and compared with the results of the gravity settling experiment.
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DEWATERING OF PHOSPHATIC CLAY SUSPENSIONS CROSS REFERENCE TO RELATED APPLICATIONS This application is the 35 U.S.C. § 371 national stage application of PCT Application No. PCT/US2015/053998, filed Oct. 5, 2015, where the PCT claims priority to, and the benefit of, U.S. provisional application entitled "CONTINU ...
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The disposal of phosphatic clay is a formidable task due to their fine size and low self-weight consolidation of the clay particles. ... A more efficient and cost-effective dewatering ...
به خواندن ادامه دهید1989), but grows best in sandy–clay loams (FAO, 2014) with pH values from 4.6–7.4 (Mitchell, 1989). Uses Forage/Feed: Japanese millet is often grown as forage in ... art of phosphatic clay dewatering technology and disposal techniques (in two parts). U.S. Dept. of Int. Bureau of Mines and Florida Institute of Phosphate
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The dewatering of stable phosphatic clay suspensions resulting from the processing of phosphate rock is a problem of much practical and theoretical significance. In order to investigate this aspect, the sedimentation behavior of suspensions of major components of phosphatic slimes, or morphologically similar meterials, both separately and in ...
به خواندن ادامه دهیدThe mechanism of electrokinetic dewatering (EKD) exploits the charge of the suspended particles, where the surface charge of the particle yields charge separation in …
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Benchtop experiments were performed, in which an electric field was used to enhance separation of water from phosphatic clay suspensions from a central Florida mine. A constitutive relationship was established that relates the increase in solids content to operating time and the applied electric field. An upper limit to the degree of separation …
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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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Since the 1950s, the problems associated with phosphatic clay disposal have stimulated research efforts to find economical and practical methods for dewatering and consolidating phosphatic clays. Various schemes have been proposed over the years, with a few marginally viable disposal methods.
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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 Publication No. 02-017-021 State-of-the-Art of Phosphatic …
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It was shown that the most important parameter in controlling the properties of the tailings suspension is "controlled" dispersion in the presence of a Ca 2+ electrolyte concentration in excess of that required to (1) prevent initial swelling and (2) provide full cation exchange of the clay. Under these electrolyte conditions, complete ...
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State of the art of phosphatic clay dewatering technology and disposal techniques; Mining Process. Above-ground growth and radium-226 uptake of cover crops grown an phosphogypsum and phosphatic clay from a phosphate mine in north carolina; An evaluation of wetland habitat establishment and wildlife utilization in phosphate clay …
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Abstract. 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 ...
به خواندن ادامه دهیدThe valorization of phosphate mine waste (PMW) in different fields has recently become attractive to many researchers. This review paper examines the potential use of PMW as a raw material in different applications toward sustainable management strategies. Dewatering, recovery of phosphate and heavy metals, building materials and …
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The system presents important applications for phosphorus recovery and mining, where the dewatering of phosphatic clay is one of the most challenging steps. The design of continuous electrokinetic systems has been recently carried out at bench-scale systems for achieving low power and energy consumption, which can lead to practical …
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A comprehensive study of the clay fabric microstructure was conducted during free-settling and electrokinetic dewatering of smectite-rich phosphatic …
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