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02-12-2014· clays and sand-clay mixes were performed on phosphatic clays from twelve different mine sites. Volumes 1, 2 and 3 titled "Index Properties of Phosphatic Clays","Mineralogy of Phosphatic Clays", and "Sedimentation Behavior of Phosphatic Clays", respectively, present extensive data on the twelve clay sources selected in the study.
01-05-2021· For clay, it mainly consisted of illite, kaolinite, quartz, calcite, and dolomite. After clay sintering at high temperature, a new phase was formed, i.e. anorthite. The effects of the MO/SiO2 ratio (MO = CaO + MgO) in mixtures (clay + sludge) on the crystallization behavior of diopside and fluorapatite, and the disappearance of the akermanite ...
Consolidation behavior of phosphatic clays -- v.5. Shear strength characteristics of phosphatic clays -- v.6. Predictive methodology for evaluating disposal methods -- v.7. Engineering properties of flocculated phosphatic clays -- v.8. Predictive methodology applied to case histories -- v.9.
06-05-2019· Waste phosphatic clay presents a difficult disposal problem and a significant loss of P 2 O 5.Recent developments make this study on the use of phosphatic clay as a feed material for H 3 PO 4 production worthwhile. (a) New data from Florida Industrial and Phosphate Research Institute (FIPR) suggest that the "clay" waste can be effectively treated by improved solid separation coupled with ...
20-01-2016· The main objective of this study was to determine the consolidation behaviour of clay slurries. A fine-grained clay with high consistency limits (wL = …
The creep behavior of normally consolidated and over consolidated samples of a highly plastic deltaic clay from the Atchafalaya Basin in Louisiana is investigated in consolidated-undrained direct-simple shear tests. From 49 to 95 percent of the undrained shear strength was applied over a typical period of one week in the stress controlled tests.
Singh, S.P., Ma, L.Q. and Harris, W.G. (2001) Heavy metal interactions with phosphatic clay: Sorption and desorption behavior. Journal of environmental quality, 30, 1961-1968. has been cited by the following article: TITLE: Sorption and desorption behavior of lead in four different soils of India
phosphatic clay slurry, phosphatic clay mixed with cover soil, and phosphatic clay mixed with spoil material. Permeability results are considered first followed by the effluent chemical analysis results. Permeability Results. The results of the permeability tests in which the phosphatic clay was placed in the form of a slurry are shown in Table 3.
25-08-2006· In order to gain insight into the overall Pb removal behavior of phosphatic clay, kinetic experiments were conducted using batch tests. A total of 0.5 g phosphatic clay powder was weighed into 250 mL polycarbonate bottles and preequilibrated with 150 mL of 0.05 M KNO 3 as a background electrolyte solution.
phosphatic slime constituents of which montmorillonite, attapulgite, kaolinite and quartz are significant (Boyle, 1969). The colloidal behavior of the phosphatic clay suspensions is believed to be due to montmorillonite and attapulgite. As the latter mineral is fibrous in nature, it was decided to incorporate in the model systems similar acicular
Sedimentation-Consolidation Behavior of Phosphatic Clays by Berg Keshian, Jr., (A.M.ASCE), Charles C. Ladd, (M.ASCE), R. E. Olson, (F.ASCE), Document Type: Proceeding ...
01-07-1989· Evaluation of Phosphatic Clay Disposal and Reclamation Methods, Volume 3. Sedimentation Behavior of Phosphatic Clays. Final Report to the Florida Institute for Phosphate Research, NTIS PB 83-210096, 241 pp. Wissa, A.E.Z., Fuleihan, N.F. and Ingra, T.S., 1983. Evaluation of Phosphatic Clay Disposal and Reclamation Methods, Volume 4.
The consolidation behavior of seven phosphatic clays was investigated via six slurry consolidation tests, seven conventional consolidation tests and two constant rate of strain consolidation tests. Highly plastic phosphatic clays displayed a higher void ratio, lower solids content, and greater compressibility at the same effective stress than clays of lower plasticity.
phosphatic clays also contain small amounts of metals and radionuclides. Rather than look upon the phosphatic clay as a waste, the Florida Institute of
15-06-2009· Phosphatic clay is a by-product of phosphate strip mining, particularly in Florida, USA. This waste material occupies about 100 000 acres of land which could be utilized for other causes. Thus, its use as an alternating cementing material for the addition into the mixing matrix of cement paste and concrete to yield higher strength would be profitable for both materials involved.
05-04-2018· Gardinier engineers were able to achieve a phosphatic clay output of 15.8% solids for a 0.8-lb consumption of flocculant per ton of (dry) phosphatic clays. When combined with tailings at a 1:1 ratio, this produced a mixture with 27.7% total solids. The water recovered, in-plant, from the feed amounted to 87.1%.
01-01-2008· In this study, phosphatic clay was used as a phosphate containing material. The fractionation of phosphorus was carried out using the CRM BCR-684 protocol, and the inorganic phosphorus, especially all the apatite phosphorus, was found as the major form. The elemental compositions of the phosphatic clay were identified using an X-ray fluorescence ...
01-03-2021· The agglomeration behavior of clays become further complicated due to their anisotropic surface charge resulting from clay edges and faces (Ndlovu et al., 2013). Novel dispersants reportedly have improved coal and phosphate flotation by agglomerating clay minerals and removing them from the surface of valuable minerals, as reported by Tao et al. (2007) ( Tao et al., 2007 ).
01-01-2008· The phosphatic clay was obtained from Vietnam mining, with the 0.15–0.075 mm sized portion used in this research. The elemental composition and mineralogy of the phosphatic clay were determined using XRF (X-ray fluorescence-Philips PW2404) and XRD (X-ray diffraction-Philips XPERT MPD) spectrometers.
02-12-2014· of three of the six phosphatic clays and corresponding sand-clay mixes was then subsequently undertaken. The results are presented in Volumes 4 and 5 titled "Consolidation Behavior of Phosphatic Clays" and "Shear Strength Characteristics of Phosphatic Clays", respectively. Concurrent with the laboratory evaluation of phosphatic clay engi-
In this study, phosphatic clay was used as a phosphate-containing material. The phosphorus was fractionated by CRM BCR-684 protocol, and inorganic phosphorus, mostly apatite phosphorus, was determined to be the major form. The elemental composition of the phosphatic clay was identified using X-ray fluorescence (XRF) spectrometry and the main compositions were CaO and P2O5.
Rapid clay dewatering : field-scale tests. by: Carrier, W. David. Published: (2001) Electrophoretic mobilities and cation exchange capacities of Florida phosphate slimes / by: May, Alexander. Published: (1975) Reclamation of phosphatic clay waste ponds by capping / Published: (1989)
Phosphatic clay, a waste by-product of the phosphate mining industry, used as an effective sorbent for Pb from aqueous effluents. The major parameters controlling aqueous Pb removal, viz. initial metal ion concentrations, solution pH, sorbent amounts, ionic strength and presence of both inorganic and organic ligands were evaluated using batch experiments.