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 …
The initiative has spurred the development of enhanced dewatering technologies for phosphatic clay. Electrokinetic separation of phosphatic clays is an …
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 ...
The mechanism of electrokinetic dewatering (EKD) exploits the charge of the suspended particles, where the surface charge of the particle yields charge separation in …
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 influence of an applied electric field. Reuss [6] reported movement of clay particles in an electrolyte …
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.
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 ...
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 …
Tests 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 …
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.
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 …
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 ...
This study takes a pragmatic approach to put into perspective the state-of-the-art of phosphatic clay handling and dewatering, and the current research efforts of industry and government. The study is presented in two parts. Part 1 is an in-depth literature …
The 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 …
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 ...
1989), 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
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.
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 ...
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 ...
A comprehensive study of the clay fabric microstructure was conducted during free-settling and electrokinetic dewatering of smectite-rich phosphatic …
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 …
Electrokinetic dewatering of a phosphate clay was investigated in an experimental program. The results show that the velocity of sedimentation is controlled …
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.
The Bureau of Mines, U.S. Department of the Interior, has developed a novel method of flocculation dewatering of phosphatic clay wastes using polyethylene oxide as the flocculant. Research was conducted to determine whether ethylene oxide gas was present in the air in the vicinity of disposed waste materials which had been flocculated …
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 …
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 ...
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 …
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 ...
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
