dewatering phosphate electrokinetic

US10486108B2 - Electrokinetic dewatering of phosphatic ...

Various examples are provided for electrokinetic dewatering of e.g., phosphatic clay suspensions. In one example, among others, a system includes a separation chamber including an anode and a cathode extending ends of the separation chamber and a power supply configured to energize the anode and the cathode to establish an electric field.

Electrokinetic dewatering project highlighted in December ...

Electrokinetic dewatering project highlighted in December 10, 2015. University of Florida press release. DEPARTMENT OF CHEMICAL ENGINEERING. Mark E. Orazem. Distinguished Professor of Chemical Engineering. ... Prototype for Continuous Dewatering of Phosphate Mine Tailings Author: Rui

Electrokinetic - Dewatering Methods

Electrokinetic has developed a wide range of EKG materials combining electroosmosis and filtration to yield an enhanced dewatering performance. This in turn offers improvements in performance (increase in solids content of dewatered material) or an increase in the speed of dewatering to the extent that filtration dewatering of some especially difficult materials becomes viable.

Efficient continuous electrokinetic dewatering of ...

Mar 01, 2019· Phosphate ores have been mined in Florida since the late 1800s, and Florida generates approximately two thirds of mined phosphate in the United States . ... Electrokinetic dewatering (EKD) is also referred to in the literature as electro-dewatering (EDW) or electro-osmotic dewatering (EOD).

"PED: pressurized electroosmotic dewatering " by Leon ...

Mechanical solid/liquid separation or dewatering of fine-grained suspensions is difficult to accomplish with any degree of success, cost effectiveness and/or practicality. The use of electroosmosis, the electrokinetic transport of water, which is theoretically independ- ent of pore size, on the other hand can be quite slow and consume a great deal of electrical energy.

3D Numerical Model of Electro-Kinetic Sedimentation− ...

Apr 18, 2020· Shang J, Lo K (1997) Electrokinetic dewatering of a phosphate clay. J Hazard Mater 55(1):117–133. Google Scholar Suthaker NN, Scott JD (1996) Measurement of hydraulic conductivity in oil sand tailings slurries. Can Geotech J 33(4):642–653. Google Scholar Terzaghi K …

Abstract: Evolutionary Development for Electrokinetic ...

Evolutionary Development for Electrokinetic Dewatering of Phosphate Mine Tailings Tuesday, May 13, 2014: 09:10 Bonnet Creek Ballroom II, Lobby Level (Hilton Orlando Bonnet Creek)

Microstructure of clay fabric in electrokinetic dewatering ...

Jun 15, 2018· Electrokinetic dewatering is considered a promising method for separation of water from clay dispersions in the mining industry. Numerous studies over the past few decades have been conducted on electrokinetic dewatering process in order to identify potential performance improvements. ... Electrokinetic dewatering of a phosphate clay. J. Hazard ...

Design of Electrolytic Dewatering Systems for Phosphatic ...

The objective of this work was to use small-scale electrokinetic experiments to develop parameters that can be used for large-scale design. A bench-top Plexiglas cell was built to perform the experiments. Clay slurry samples were obtained from a phosphate mine located in Central Florida.

Semi-Continuous Electrokinetic Dewatering of Phosphatic ...

Sep 10, 2014· 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. ... Phosphate ores are mined in seven locations ...

Electrokinetic dewatering of a phosphate clay - ScienceDirect

Electrokinetic dewatering of a phosphate clay was investigated in an experimental program. The results show that the velocity of sedimentation is controlled by the applied current density and that electro-osmotic permeability dominates the effectiveness of electrokinetic consolidation. The intermittent current and polarity reversal can ...

SETTLING OF SUPERNATANT FROM SEMICONTINUOUS …

While electrokinetic dewatering reduced the turbidity of the supernatant liquid, subsequent settling greatly reduced the turbidity of the supernatant before. The ... phosphate ore) is a waste product of phosphate mining. Clay suspensions, which contain 3-5 wt% initial solids content (Carrier 2001), are pumped to clay settling areas ...

Dewatering of Sewage Sludge by Electrokinetics -Journal of ...

Nov 29, 2006· In this study, an experiment of sewage sludge dewatering is carried by using electrokinetic method, and the electrokinetic dewatering efficiency of digested sludge is analyzed. ... Schang, J.Q. and Lo, K.Y. (1997) Electrokinetic dewatering of Florida phosphate clay, Journal of Hazardous Materials, Special Edition Yoshida, H., Shinkawa, T., and ...

Abstract: Clay Fabric in Electrokinetic Dewatering (225th ...

May 14, 2014· Electrokinetic dewatering, a promising way to separate the clay particles from water in suspensions, has been researched for many years on topics like equipment design, parametric optimization, and ion migration. 1 However, little work has been done on the clay fabric which affects the performance to a considerable degree during electrokinetic dewatering since different fabrics have …

Dewatering, metal removal, pathogen elimination, and ...

Municipal and industrial wastewater treatment plants (WWTP) produce sludge that contains around 5% of solids. Sludge requires further treatment before final disposal, which is limited because of the contents of heavy metals, nutrients, and some pathogens. A solution for more efficient biosolids management is urgent. The main objective of this study is revitalization of biosolids focussing on ...

Dewatering Sludge Using Electrokinetic Geosynthetics ...

Electrokinetic dewatering involves the application of a D.C Voltage across the sludge, driving water under an electrical gradient from positive (anode) electrode to negative (cathode) electrode. However, there have been several reasons why this technique has not been adopted in practice, not least because the, normally metallic, anode rapidly ...

Electrokinetic dewatering of phosphatic clay settling ...

Electrokinetic dewatering of phosphatic clay settling areas: numerical simula... J P McKinney; M E Orazem Minerals & Metallurgical Processing; May 2011; 28, 2; ABI/INFORM Trade & Industry

Electrokinetic Dewatering of Sewage Sludge with Fixed and ...

Jan 01, 2016· This paper presents a laboratory study on electrokinetic dewatering (EKD) of sewage sludge with fixed and moving electrodes. The experiments with fixed electrodes were conducted in two purposely designed Perspex cylinders to investigate the mechanism of attenuation in electroosmotic flow and dewatering efficiency.

US Patent for Apparatus for the dewatering of phosphate ...

Method and apparatus for dewatering mill tailings, slimes and slurries, wherein ultra fine particles materially reduce the rate of natural dewatering and hinder their disposal in the mining and processing of phosphate, coal, potash, uranium, talc and the like. The invention is preferably carried out in a closed loop system involving the use of electrokinetic densification and substantially ...

[Download PDF] Dewatering Florida phosphatic clay wastes ...

Download Dewatering Florida phosphatic clay wastes by a moving screen method FB2 [Washington]: Dept. of the Interior, Bureau of Mines, (OCoLC) Material Type. Various examples related to electrokinetic dewatering (EKD) of suspensions such as, …

Electrokinetic geosynthetics - SlideShare

Dewatering of mine tailings Disposal of kimberlite slimes Dewatered tailings (78%) dry solids. 16. Conclusion o Active geo synthetics in the form of EKG materials open up a new range of applications for geo synthetics. o EKG applications relate to a number of main drivers including legal requirements, climate change, the need to reduce carbon ...

US20140131206A1 - Capacitive electrokinetic dewatering of ...

An apparatus and process for electrophoretic and electro-osmotic densification, decontamination and dewatering of suspensions includes the use of high electrical capacitance electrodes for capacitive generation of electric fields. Polarity reversals between the capacitor electrodes prevent faradic electrolysis and corrosion reactions at the electrodes, and water wettable, flexible linings for ...

US4808304A - Apparatus for the dewatering of phosphate ...

Method and apparatus for dewatering mill tailings, slimes and slurries, wherein ultra fine particles materially reduce the rate of natural dewatering and hinder their disposal in the mining and processing of phosphate, coal, potash, uranium, talc and the like. The invention is preferably carried out in a closed loop system involving the use of electrokinetic densification and substantially ...

Electrokinetic dewatering of a phosphate clay - ScienceDirect

Aug 01, 1997· Electrokinetic dewatering of a phosphate clay suspension from Florida was investigated in an electrokinetic cell and in a model tank. The results demonstrated that the sedimentation velocity was controlled by the applied current density. The techniques of intermittent current and polarity reversal improved the effectiveness and efficiency of ...

Resistivity of Phosphatic Clay Slurries During ...

Phosphatic clay slurries are generated while processing phosphate matrices for fertilizer production and are associated with several environmental issues. Recent research has shown that the electrokinetic dewatering of phosphatic clay is a potential solution that would alleviate environmental issues.

Semicontinuous Electrokinetic Dewatering of Clay Suspensions

The experimental results showed that electrokinetic dewatering occurs in semi-continuous operation and that the close electrode spacing, which greatly reduced the power requirement, did not impair separation. These results motivated a discussion of how electrokinetic effects could be incorporated into existing thickening equipment.

(DOC) THE EFFECT OF ELECTROKINETIC ON PORE WATER OF …

Shang, J.Q. and Lo, K.Y., Electrokinetic Dewatering of a Phosphate Clay, Journal of Hazardous Materials, 1997, pp. 117-133. 10 Related Papers. Ground Improvement and Stablization. By Nurly Gofar. Reduction of Contaminants in Soil and Water by Direct Electric Current. By Sibel Pamukcu ...

Electrokinetic dewatering of phosphatic clay settling ...

10%· A mathematical model is presented for the electrokinetic dewatering of suspensions of phosphatic clays. The modeling approach couples a boundary-element model for solution of Laplace's equation to a recently developed constitutive equation that relates the change in solids content with applied electric field and time. The observation that the electric field controls both the maximum solids ...

Electrokinetic dewatering of phosphatic clay settling ...

A mathematical model is presented for the electrokinetic dewatering of suspensions of phosphatic clays. The modeling approach couples a boundary-element model for solution of Laplace's equation to a recently developed constitutive equation that relates the change in solids content with applied electric field and time. The observation that the electric field controls both the maximum solids ...

ENERGOS ELECTROKINETIC SLUDGE DEWATERING TEST - YouTube

In 2010, ENERGOS conducted their first electrokinetic dewatering machine test in sewage water treatment plant in Chungchung-do in Korea.They can achieve more...

Electrokinetic - Solving ground engineering and dewatering ...

New technology available from Electrokinetic Ltd is bringing substantial benefits to historically difficult ground engineering and dewatering problems. The patented technology, electrokinetic geosynthetics (EKG), has numerous applications across a range of industries including stabilisation of embankments and cuttings; dewatering of wastes such as sewage sludge and mine tailings; and sports ...

Electrokinetic dewatering of mine tailings from ...

Shang, JQ 1997b, 'Electrokinetic dewatering of clay slurries as engineering soil covers', Canadian Geotechnical Journal, vol. 34, no. 1, pp. 78–86. Shang, JQ & Mohamedelhassan, E 2001, 'Electrokinetic dewatering of Eneabba West mine tailings: An experimental study.'

A constitutive relationship for electrokinetic dewatering ...

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Development of Fully‐Continuous Electrokinetic Dewatering ...

Oct 26, 2018· The fully continuous prototype developed for electrokinetic dewatering produced low‐turbidity water and thickened clay. The concentration of hydrogen was calculated for the lab prototype and estimated for a full‐scale on‐site installation, and both …

Dewatering of mine tailings using electrokinetic geosynthetics

Dewatering of mine tailings using electrokinetic geosynthetics A.B Fourie, D.G. Johns, and C.J.F.P. Jones Abstract: Many mining operations produce tailings that dewater very slowly under self-weight consolidation. One way of reducing the water content of such tailings is by electroosmotic dewatering.

Device for Efficient Continuous Electrokinetic Dewatering ...

Various examples related to electrokinetic dewatering (EKD) of suspensions such as, e.g., phosphatic clay suspensions are provided. In one example, a system for continuous EKD includes cake dewatering unit having a lower conveying belt extending across a dewatering chamber; an upper conveying belt extending across at least a portion of the dewatering chamber; and a sludge inlet configured to ...