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·Int J Impact Engng Vol 13 No 1 pp 53 83 1993 0734 743X/93 $ Printed in Great Britain 1993 Pergamon Press Ltd MICROMECHANICAL MODEL FOR COMMINUTION AND GRANULAR FLOW OF BRITTLE MATERIAL UNDER HIGH STRAIN RATE APPLICATION TO PENETRATION OF CERAMIC TARGETS D R CURRAN L
·The behavior of batch grinding of a dry binary mix using dolomite and quartz has been studied Through several tests with different proportions of these minerals and different grinding cycles the
DOI / Corpus ID 132663991; Dolomitization of the Silurian Niur Formation Tabas block east central Iran Fluid flow and dolomite evolution article{Mahboubi2016DolomitizationOT title={Dolomitization of the Silurian Niur Formation Tabas block east central Iran Fluid flow and dolomite evolution} author={Asadollah
·Breakage and flow are analysed in twin roll and cone crushers • Crushing behaviour in a VSI involves multiple mechanisms of impact breakage Abstract Particle scale modelling of comminution processes can provide significant insight into the flow of particles their breakage the effect of slurry wear and energy utilisation within these
·Dolomite calcination in N 2 and CO 2 has been extensively researched [[18] [19] [20]] The general and fairly simplified view is that dolomite decomposes in a single step at a low CO 2 partial pressure < kPa or in two steps at a high CO 2 partial pressure > kPa [21] The single step reaction generally occurs at a temperature around 700 °C
·They all infer high strain and granular flow within the gritty dolomite although the slip mechanism and the origin and evolution of the rock assemblage is unclear Viola et al 2006 suggested that the gritty dolomite formed by comminution of other fault rock members of the Sole Dolomite but the specific mechanism mineralogy and texture
·Two dolomite fractions dolomite powder 1 2 mm and dolomite chippings 2 5 mm and sand media were used in the laboratory scale installed for the comparative experiments
·Dolostones often consist of different generations of dolomite formed by different flow systems and mechanisms Metastable proto dolomites may be formed especially in near surface and shallow burial settings which later and deeper recrystallize to more stable dolomites either in one or in several recrystallization steps
·Both scenarios indicate an exponential relationship between breakthrough times and flow rates versus dolomite proportions However regardless of dolomite proportions a low number of well aligned dolomite bodies can produce the same behavior as many poorly aligned dolomite bodies The sensitivity of the flow behavior to the geological models
·The primary objectives of this study were to 1 understand of the nature and origin of subsurface flow processes occurring in a soil mantled sub tropical dolomite karst slope; and 2 analyze how the integrated soil epikarst architecture system initial moisture conditions and rainfall intensity effect subsurface flow onset rate and
·Comminution or size reduction is the primary operation in mineral dressing and involves crushing and grinding the raw ore to liberate valuable minerals The key steps in comminution are primary crushing secondary crushing coarse grinding and fine grinding The screen wear is high and hence expensive 2 Free Over flow mill Simplest
·Experiments were performed with crushed sucrosic dolomite Two types of flow experiments were carried out The first type used columns of cm length and cm diameter packed with 350 500 μm diameter particles and column porosity of 29% in order to study long term effects The second type of flow experiments was designed to enable
The smithsonite and dolomite samples for the investigation were sourced from Lanping County and Kunming City in Yunnan Province respectively Initially the ore lumps were manually crushed before being finely pulverized with an agate mortar and pestle After comminution the pure mineral samples were sifted through standard mesh screens
·Using these split factors it is possible to track the flow of energy to the constituents of the feed charge and integrate the energetic and kinetic aspects of multicomponent grinding Extensive data on dry and wet ball mill grinding of binary feeds comprising calcite quartz hematite quartz and dolomite hematite mixtures in different
·The present literature review explores the energy efficient ultrafine grinding of particles using stirred mills The review provides an overview of the different techniques for size reduction and the impact of energy requirements on the choice of stirred mills It also discusses the factors including the design operating parameters and feed material properties
·The iron ore production has significantly expanded in recent years owing to increasing steel demands in developing countries However the content of iron in ore deposits has deteriorated and low grade iron ore has been processed The fines resulting from the concentration process must be agglomerated for use in iron and steelmaking This chapter
·The design of the comminution machine and its operational parameters such as the kind of load its frequency velocity and energy take decisive influence on the comminution system Selective comminution can be expected only if both material properties and comminution technology are suitable see Fig 12 If applicable however it may be an
·The δ 18 O and δ 13 C values for saddle dolomite from the Sulphur Point range from − to −‰ VPDB and to −‰ VPDB respectively 87 Sr/ 86 Sr values range from to The lowest value is similar to that of Middle Devonian seawater whereas the most radiogenic value indicates an allochthonous source Fluid inclusions analysed in the
DOI / Corpus ID 128678887; Dolomitization of the Latemar platform Fluid flow and dolomite evolution article{Jacquemyn2014DolomitizationOT title={Dolomitization of the Latemar platform Fluid flow and dolomite evolution} author={Carl Jacquemyn and Hamdy Ahmed El Desouky and David W Hunt and Giulio Casini and Rudy
When the passive margin of North America became the zone of plate convergence in the Cretaceous the host carbonatites were strongly deformed which is manifested in structures and textures indicative of grain comminution ductile flow folding and locally
·The specified dependence suggests first order breakage kinetics for wet comminution of dolomite Results are summarized in Table 4 In particulate systems where the feed particle size distribution greatly influences the outcome of the process proper sampling and granulometric analysis represents important step
