Shear Strength Correlations for Kaolin/Water Slurries: A …
Four kaolin/water mixtures were obtained by PNNL from FAI. The shear strengths of these mixtures were measured, and a correlation was developed relating shear strength and wt% clay. This correlation is needed to estimate the shear strengths of specific kaolin/water mixtures used in the vessel-spanning bubble tests.
WO1997001390A1
A kaolin clay slurry having a reduced viscosity is manufactured by a process which comprises the sequential steps of mechanically working an undispersed crude kaolin clay material having a solids content of at least about 65 percent, by weight, under conditions which insure that the kaolin clay material will be subjected to an energy level of at least …
Modelling the mechanical behaviour of clay using particle …
Further images of kaolin slurries can be found in the literature [16, 18, 19], as well as images of suspensions with a much smaller clay content [20,21,22], all of which corroborate this view. We acknowledge here that in this paper, by starting with 'breakable clay stacks' we are facilitating a compaction mechanism similar to sand but the ...
US5647895A
The kaolin clay slurry is divided into test samples of 3 gallons each, and the samples are heated in a Parr reactor, at 15 psi pressure, for 15 minutes at either 93° C. or 104° C. After heating, the samples are cooled to 35° C. After the samples cool to 35° C., the microbiocide of choice is immediately added.
Metals | Free Full-Text | Use of Multi-Anionic Sodium
This research aims to analyze the impact of sodium tripolyphosphate (STPP) as a rheological modifier of concentrated kaolin slurries in seawater at pH 8, which is characteristic of copper sulfide processing operations. The dispersion phenomenon was analyzed through chord length measurements using the focused beam reflectance …
Rheological study of kaolin clay slurries | Semantic Scholar
Parametry reologiczne wodnych zawiesin kaolinu KOC. J. Partyka K. Wodnicka Ł. Wójcik. Materials Science. 2010. 1. Semantic Scholar extracted view of "Rheological study of kaolin clay slurries" by Chad Gordon Litzenberger.
Kaolin Clay Slurries: Unusual Surface Chemistry-Rheology …
Unimin's kaolin clay slurry exhibited a very unusual relationship between rheology and surface chemistry. It displayed a maximum yield stress that is not located at the point of …
Rheological study of kaolin clay slurries
Concentrated kaolin clay slurries are found in a number of industrial operations including mine tailings surface disposal, underground paste backfill, and riverbed dredging. An understanding of the impact of solids concentration and addition of chemical species on slurry rheology is of importance to designers of pipeline transport and waste disposal …
Structural recovery behaviour of kaolin, bentonite and K
Kaolin clay slurries were not found to display significant time-dependent behaviour. In contrast bentonite and K-montmorillonite clay slurries showed very pronounced time-dependent behaviour, where the yield stress increases significantly with time of aging. The Nguyen–Boger and Leong models were used to describe the structural recovery ...
Flocculation and dewatering of the Kaolin slurry
Figure A2 shows the settling curves of the untreated and flocculated Kaolin slurries, and Fig. 1 a quantitatively compares the settling rates of the slurries under different flocculation conditions. From these figures, it can be seen that all ionic types of PAMs can increase the settling rate of Kaolin slurry, while a single dose of PAC exerts …
US5593490A
A kaolin clay slurry having a reduced viscosity is manufactured by a process which comprises the sequential steps of mechanically working an undispersed crude kaolin clay material having a solids content of at least about 65 percent, by weight, under conditions which insure that the kaolin clay material will be subjected to an energy level of at least …
THE EFFECT OF CONCENTRATION AND CHEMICAL …
(TSPP, Na4P2O7) was used to disperse the clay particles for selected slurries. It was found that the kaolin clay slurries, in the absence of TSPP, exhibited yield stresses and could be characterized with either the two-parameter Bingham or Casson continuum flow models. Increasing the clay concentration in the slurry, while
Rheological and zeta potential behaviour of kaolin and bentonite
Abstract. The results of the yield stress–pH and zeta potential–pH behaviour of pure kaolin and bentonite slurries, and mixed bentonite–kaolin slurries were evaluated. A high and low Ca (II) content kaolin clays were used. The location of the pH of maximum yield stress of the two pure kaolin slurries is very different, pH 9 for the high ...
Laminar and turbulent flow predictions of kaolin slurry (C v …
An artificial/reconstituted clay was prepared by mixing kaolin (K) and silt (S) in the proportion of 50% kaolin and 50% silt by weight employing a slurry deposition technique. ... Kaolin slurries ...
Rheological study of kaolin clay slurries
It was found that the kaolin clay slurries, in the absence of TSPP, exhibited yield stresses and could be characterized with either the two-parameter Bingham or Casson …
Overview of the Rheological Behaviour of Ceramic Slurries
Clay and water mixtures, if mixed in 5:1 w/w ratio, form a plastic paste; subsequent water additions, in order to achieve 3:1 and 1:1 w/w ratios, produce collo– idal suspensions. Water molecules act like dipoles and therefore exhibit strong electrostatic interactions with clay and kaolin particles [14-16]. Clay/kaolin and water
Flow behaviour of kaolin clay slurries
Abstract. Kaolin clay slurries were studied using a concentric cylinder viscometer and a 25.8 mm I.D. vertical pipe viscometer. Clay volume fraction was varied between 0.10 and 0.19 while the mass ...
Differences in the rheology and surface chemistry of kaolin …
With both Fluka and Sigma kaolin clay slurries, increasing the citric acid concentration did not produce a significant change in yield stress–pH behaviour. This suggests that the heterogeneous edge-face attraction has already been completely …
(PDF) SEDIMENTATION OF KAOLIN: EFFECTS OF
Solids content (wt%) of kaolin vs. time (min) with varying PEI dosages and Mw added into slurries at pH ~8 Kaolin is a 1:1 clay with a tetrahedral silica sheet attached to an octahedral alumina ...
Rheological and zeta potential behaviour of kaolin and …
Kaolin clay was used as drilled formation cutting at different concentrations (5, 10, 20, and 30 lb/bbl). ... seawater-based bentonite slurries with increased salt content were prepared to ...
Rheological Study of Kaolin Clay Slurries
The slurries were prepared in varying kaolin clay solids concentrations with reverse osmosis water. A flocculant, dihydrated calcium chloride (CaCl2 ¡¤ 2H2O), was …
Adsorbed phosphate additives for interrogating the …
For some kaolin clay slurries, there may be as many as three linear yield stress-zeta potential squared regions (Shanker et al. 2010). One of these linear regions is characterised by a positive ...
US4017324A
A clay slurry containing 50% or more of non-volatile solids comprising calcined kaolin clay and from 8 - 331/3% of hydrated kaolin clay based on the weight of the calcined clay. Additionally the slurry contains from 0.01% to 10% of a suspending agent such as bentonite clay, hydroxyethyl cellulose, methyl cellulose, carboxymethyl cellulose and a dispersant …
FLOW BEHAVIOUR OF NON-NEWTONIAN CLAY SLURRIES …
The aim of the paper is experimentally investigate the flow behaviour of the nonNewtonian clay slurries. Kaolin slurries of different concentrations (ranging from Cv = 2.8% to the maximum possible one of 22.6%) were tested by a pipeline test loop (D = 628 Ninth International Water Technology Conference, IWTC9 2005, Sharm El-Sheikh, Egypt 17.5 ...
FLOW BEHAVIOUR OF NON-NEWTONIAN CLAY SLURRIES
The aim of the paper is experimentally investigate the flow behaviour of the non-Newtonian clay slurries. Kaolin and peptized kaolin slurries of different concentrations were tested by a pipeline test loop in both laminar and turbulent regimes. Predictive models were applied to fit the experimental data. The similarity of non-Newtonian ...
Differences in the rheology and surface chemistry of kaolin …
Differences in the rheology and surface chemistry of kaolin clay slurries: The source of the variations | Semantic Scholar. DOI: 10.1016/J.CES.2009.05.015. …
Adsorbed phosphate additives for interrogating the nature …
The kaolin clay used was supplied by Unimin Australia Ltd. in Perth marketed as Prestige™ NY Kaolin Forming Clay. The powder has a d 50 = 2.79 μm measured with Malvern Mastersizer. It has a BET surface area of 2.8 m 2 /g. The composition of the two batches of Unimin clay used in this study, determined by XRF is tabulated in Table 1.
Controlling attractive interparticle forces via small anionic …
Some kaolin clay slurries displayed a maximum yield dation and rheological properties including time-dependent stress at zeta potential as large as −25 mV (Johnson et al., 1999) behavior. In this study, very small adsorbed additives with a and −40 mV (Prashant et al., 2010). The reasons for this differ- relatively low charge will be used in ...
Rheological characteristics of mixed kaolin–sand slurry
Significant amount of slurry waste is produced from mineral processing plants globally constituting high levels of both kaolin and sand in aqueous suspension. Large quantities of slurry and mine tailings require efficient handling, transportation and storage system. The transportation and treatment of kaolin–sand slurry is dependent on its …
Shear Strength Correlations for Kaolin/Water Slurries: A …
Four kaolin/water mixtures were obtained by PNNL from FAI. The shear strengths of these mixtures were measured, and a correlation was developed relating shear strength and …
