Slurry rheology in mineral processing unit operations: A critical review. ... The effect of grinding aids on dry micro fine grinding of feldspar. ... The effect of slurry density on breakage parameters of quartz, coal and copper ore in a laboratory ball mill.
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Munn15 to determine the effect of slurry rheology on industrial grinding performance, evaluated based on the so-called "grinding index". The rheology of the mill discharge slurries was measured and the four operating variables of mill throughput, slurry density, slurry …
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The effect of slurry rheology on fine grinding in a laboratory ball mill @article{Tangsathitkulchai2003TheEO, title={The effect of slurry rheology on fine grinding in a laboratory ball mill}, author={C. Tangsathitkulchai}, journal={International Journal of Mineral Processing}, year={2003}, volume={69}, pages={29-47} } C. Tangsathitkulchai
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3. Parameter effects on wet ultrafine grinding of limestone through slurry rheology in a stirred media mill Mingzhao He, Yanmin Wang and Eric Forssberg Powder Technology 161 (2006) 10-21. 4. Influence of slurry rheology on stirred media milling of quartzite Mingzhao He and Eric Forssberg, International Journal of Mineral Processing (2007), in ...
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Abstract The wet grinding of materials in most industrial grinding devices can be significantly influenced by controlled changes in slurry rheology. Thus, pulp density, the level of fines present, and the pulp chemistry conditions are all very important to maximizing throughput. This paper will present a brief summary of what grinding studies involving slurry rheology control have shown ...
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This article summarizes slurry rheology influence on the grinding throughput of batch laboratory and continuous plant-scale mills operating in open and closed circuit configurations. The results of controlled changes in percent solids, particle size, slurry temperature, and viscosity control chemicals were demonstrated. More specifically, dilatant slurries show first order breakage.
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Wet ultra-fine grinding of a limestone powder ( less than or equal 100 μm) has been investigated in a stirred media mill with respect to the effect of slurry rheology. The grinding results obtained by various parameters (i.e., molecular weight of a dispersant, solids concentration, additive dosage, addition method and beads load) are evaluated ...
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Sep 01, 1995· Research accomplishments are summarized for: standardization of experimental procedures; investigation of effect of high-pressure roll mill/ball mill grinding on the energetics of fine grinding and the rheology of coal-water slurries prepared with such fines; study of aging behavior of slurries; and ways of improving rheology of slurries.
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Dec 27, 2019· A rigorous literature review has been carried out on rheological behavior of hard and soft particle slurries. The rheological characteristics of unimodal and bimodal suspension are presented. From experimentation, it was observed that mineral viscosity increases with solid concentration, while decreases with temperature. Addition of 30% (by weight) proportion of finer particles in coarse ...
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A pilot scale study was conducted on ultra-fine grinding in a horizontal stirred mill. The main objectives were to investigate grinding kinetics, the influences of rheology and effects of bead size on performance criteria. The main criteria were breakage rate, particle size reduction, product size distribution and power consumption. The results confirm the "first-order" breakage rates in ...
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Previous papers by these authors on slurry rheology control grinding aids have emphasized the end-use results and application methodology involved. This paper emphasizes the chemical principles and the influence of various chemical structures behind slurry rheology control chemicals. Particular examples are shown which correlate chemical structure modifications to environmental factors ...
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Operating conditions and impeller slurry rheology for wet grinding applications is given in design can affect the slurry distribution within the mill He et al. (2004). They suggest that optimization of slurry with some regions of the charge potentially being drier rheology for a mill may provide increased throughput, and others saturated.
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Jul 16, 2021· Ndimande et al. also demonstrated the effect of describing the slurry in the case of a stirred mill. The exclusive use of DEM with properly calibrated parameters is hereby considered justified, given the high density of the steel grinding media when compared to the slurry . As such, in the present work it is recognized that the absence of ...
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Abstract Experimental work has been conducted on industrial-scale wet comminution devices and hydrocyclone classifiers to investigate the effects of slurry rheology on their performance. Grinding performance is shown to be influenced not only by the absolute value of apparent viscosity and an inferred yield stress, but also by the rheological type of the discharge slurry.
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Feb 01, 2007· The rheological behavior of original limestone slurries (<100 μm) is transformed through different types of flows with increasing solids concentration. The use of Dispersant S40 can improve the slurry flowability by decreasing viscosity and eliminating Casson yield stress. It is therefore used as a grinding aid for the wet ultrafine grinding ...
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Aug 06, 2015· Mill slurry characteristics affect grinding efficiency because of their influence on slurry rheology. Slurry characteristics can be manipulated and tested to determine their effect on grinding efficiency. There are three mill slurry characteristics which you should note. The % …
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The effects of percent solids, mill loading, and grinding time on product size distribution and ball wear were studied in a laboratory ball mill for a taconite ore. Mild steel balls and HCLA steel balls were used to examine the role that ball hardness play in grinding. Net production of −44-µm (−325-mesh) material reached maximum at 70% solids, whereas the ball wear decreased as pulp ...
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Keywords: fine wet grinding; ball mill; slurry rheology; breakage rates 1. Introduction It is generally observed that dry and wet grinding of materials in tumbling ball mills to very fine sizes can lead to the slowing down of the overall grinding process (Austin et al., 1984; Frances and Laguerie, 1998; Yekeler et al., 2001). This effect ...
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Dec 22, 2010· (2000). Effect of Rheology of Grinding Efficiency in the Laboratory Scale Continuous Classifying Mill. Mineral Processing and Extractive Metallurgy Review: Vol. 20, No. 1, pp. 133-154.
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Tangsathikulchai, C. The effect of slurry rheology on fine grinding in a laboratory ball mill. Int. J. Miner. Process. 2003, 69, 29–47. [Google Scholar] Tangsathikulchai, C. Effect of Medium Viscosity on Breakage Parameters of Quartz in a Laboratory Ball-Mill. Ind. Eng. Chem. Res. 2004, 43, 2104–2112. [Google Scholar]
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Wet ultra-fine grinding of a limestone material ( 100 ¦Ìm) has been investigated in a stirred media mill with respect to the effect of slurry rheology. The results obtained by varying operation parameters (i.e., molecular weight of a dispersant, solid concentration, addition dosage, addition method and bead load) are evaluated in terms of ...
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the properties of the slurry being tested. The work in this study extended the experiments to include slurries with solids concentrations in the tumbling mills operations range. Typical measurements for rheology charac-terization of slurries are performed using very fine particles mixed with water. In this study The effect of particle sizes and ...
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Oct 11, 2004· The characterization of slurry rheology using average torque drawn by tumbling ball mills has been reported, . Zheng et al. measured the relationship of the torque of a stirred media mill versus grinding time to characterize slurry rheology in wet ultrafine grinding in order to reveal the effect of grinding aids on the slurry rheology.
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Dec 01, 1995· The objective of this research is the development of improved technology of the preparation of coal-water slurries that have potential for replacing fuel oil in direct combustion. Research accomplishments are summarized for: standardization of experimental procedures; investigation of effect of high-pressure roll mill/ball mill grinding on the energetics of fine grinding and the rheology of ...
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Nov 18, 2020· Both shear and flocculation have a significant influence on the rheological behavior of tailings, especially the yield stress. In the two-step flocculation process, the above two kinds of actions exist at the same time, and they influence each other. In order to explore the change rule of the yield stress and its internal causes, a two-step flocculation process of the iron ore fine tailings ...
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Jul 01, 2002· Slurry rheology affects both the breakage behaviour and the mass transport mechanism in a grinding mill, and hence, influences the milling energy efficiency. The present authors are aware of over 40 references dealing with rheological effects on particle breakage, mass transport, mill power draw, and the use of grinding aids.
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Also, wet ultra-fine grinding of a limestone powder ( 100 um) has been investigated based on the effect of slurry rheology. The grinding results through various parameters (i.e., molecular weight of a dispersant, solids concentration, additive dosage, additive method, feed temperature and bead load) are evaluated in terms of energy efficiency ...
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Mar 01, 2003· To check the effect of slurry rheology on the slowing down of breakage rates in fine wet grinding, the slowing-down factor (K s) was plotted against the relative apparent viscosity of slurry (μ R) on a log–log scale, as shown in Fig. 15.
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Research accomplishments are summarized for: standardization of experimental procedures; investigation of effect of high-pressure roll mill/ball mill grinding on the energetics of fine grinding and the rheology of coal-water slurries prepared with such fines; study of aging behavior of slurries; and ways of improving rheology of slurries.
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Shoop, K. J. and Kawatra, S. K, "Effect of Rock Breakage Characteristics and fines/clay content on the Autogenous Grinding of Iron Ore" Minerals and Metallurgical Processing, Vol. 13, , 1997, pp. 14-21.
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The effect of grinding conditions was studied by changing the solids feed rate, the feed slurry density, the weight of ball charge and the mill rotation speed. The optima of these variables in terms of energy consumption and production rate of fine fractions were determined individually for each tested ore.
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This article summarizes slurry rheology influence on the grinding throughput of batch laboratory and continuous plant-scale mills operating in open and closed circuit configurations. The results of controlled changes in percent solids, particle size, slurry temperature, and …
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The significance of fine wet grinding in many industrial applications is obvious, but available data in this area are quite limited. This paper reports further results on the kinetic analysis and mechanisms underlying the slowing down of breakage rates in fine wet grinding, with emphasis on the effect of slurry rheology in a batch laboratory ...
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