The effects of powder filling on the kinetic breakage parameters of natural amorphous silica

Denız, Vedat

doi:10.1080/02726351.2016.1194347

Cited by 9 publications

(4 citation statements)

References 10 publications

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“…However, further addition of material results in lower breakage rates because the collision zones are already saturated, thus increasing the cushioning effect. On the contrary, in another study involving natural amorphous silica, Deniz [48] found that the lower the material filling in the mill, the higher is the breakage rate.…”

Section: Resultsmentioning

confidence: 89%

Modeling of Bauxite Ore Wet Milling for the Improvement of Process and Energy Efficiency

Petrakis

Komnitsas

2021

Circ.Econ.Sust.

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Size reduction is a necessary operation in mineral processing plants and provides the desired size for separation operations and the liberation of the valuable minerals present in ores. Estimations on energy consumption indicate that milling consumes more than 50 % of the total energy used in mining operations. Despite the fact that ball milling is an efficient operation, it is energy intensive, and its modeling is a great challenge. In the present experimental study, efforts are made to model wet milling of bauxite ores and identify the optimum material filling volume in the ball mill. Modeling is based on the characterization of the grinding products obtained after various grinding periods and the description of the particle size distributions using mathematical approaches, i.e., Gates-Gaudin-Schuhmann (GGS), Rosin-Rammler (RR), and logistic distributions. In addition, grinding kinetic models were applied to the experimental data in order to identify if the linear theory of the population balance model is valid during bauxite grinding. The experimental data revealed that the logistic distribution is a model that represents more reliably particle size distributions obtained after grinding and fits the experimental data better than the GGS and RR models. Regarding grinding kinetic analysis, it was found that grinding exhibits non-first-order behavior and the reduction rate of each size is time dependent. This experimental work is in line with the Sustainable Development Goal of UN, SDG12: Responsible Consumption and Production and aims to improve the efficiency of ore grinding and thus reduce energy requirements and the associated CO 2 emissions.

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Section: Resultsmentioning

confidence: 89%

Modeling of Bauxite Ore Wet Milling for the Improvement of Process and Energy Efficiency

Petrakis

Komnitsas

2021

Circ.Econ.Sust.

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“…Ipek (2006) found that the highest mill capacity for K-feldspar is at U=1.25, while Deniz and Onur (2002) found U = 0.4 for the pumice sample. In addition, Deniz (2011a) found about U= 1.5-2.0 for the gypsum sample, while Deniz (2017) found that the optimum value of U for the highest mill capacity for natural amorphous silica was above 166.7% (U  1.667). On the other hand, Deniz (2011b) found that a maximum of U for the diatomite sample was 1.31 for up to 0.300 mm fractional particle size.…”

Section: Verification Of the Correlations Between The Liberation Degr...mentioning

confidence: 99%

“…On the other hand,Deniz (2011b) found that a maximum of U for the diatomite sample was 1.31 for up to 0.300 mm fractional particle size. However, the optimum value for under 0.300 mm fractional size was U>1.61.Plotted against fcSi versus U for chromite ore (Fig.6), and as a result of the graphical representation, different results were found with the results from some investigators(Shoji et al, 1982;Deniz and Onur, 2002; Tangsathitkulchai, 2003;Ipek, 2006;Deniz, 2011a;Deniz, 2017). From our results, it was observed that the relationship between the increase in U value and the relative absolute rate of breakage (fcSi) varies depending on the particle size.…”

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confidence: 93%

The relationships between the kinetic grinding parameters with interstitial fillings and the liberation degree of a chromite ore

Umucu¹,

Denız²,

Gürsoy³

et al. 2023

Physicochem. Probl. Miner. Process.

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In this study, the relationships between the liberation degree and the kinetic breakage parameters of a chromite ore obtained from the Burdur (Türkiye) were examined under the laboratory conditions. Firstly, liberation degrees for chromite particles were determined by the particle counting method in a metal microscope for 4 different size groups. Secondly, the breakage parameter of chromite ore which was dry ground with a ball mill was obtained using standard test methods. Additionally, the model parameters were also determined for the fractional interstitial fillings (U) of the chromite sample. Thirdly, the kinetic grinding parameters were compared with the liberation degree of the chromite sample. As a result of the tests, a very good correlation was obtained with R2=0.998, and regression analysis in the grinding processing of the chromite ore was used to verify the validity of the relationship parameter of Si that was produced. To these, it was found that interstitial fillings (U=0.6, 0.8, 1.0, and 1.2) have an effect on the grinding.

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“…The rational value of content at the achievement of maximum efficiency of dry fine grinding of gypsum fineness was found in [14]. The influence of the material contained in the fill on the process of dry grinding of silica was studied in [15]. The crushed material volume was 5, 10, 15, and 20 % of the volume of cavities between the grinding bodies.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Establishing the effect of decreased power intensity of self-oscillatory grinding in a tumbling mill when the crushed material content in the intra-chamber fill is reduced

Deineka

Naumenko

2020

EEJET

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The influence of the content of crushed material in the intra-chamber grinding fill on the efficiency of the self-oscillatory grinding process in the tumbling mill was assessed. A dynamic effect of a significant decrease in self-oscillatory action of the two-fraction fill of the rotary chamber with an increase in the content of fine fraction was revealed by the method of visual analysis of motion patterns. A decrease in values of the following inertial fill parameters was established: maximum dilatancy υ max , the relative amplitude of self-oscillations ψ Rυ and a maximum share of the active part κ fam max with an increase in the degree of filling the gaps between particles of the coarse fraction κ mbgr. A decrease in the generalized complex degree of dynamic activation K a was also established. The effect is due to the strengthening of the cohesive properties of the incoherent coarse fraction under the influence of the fine fraction. There was a decrease in by 29 % for υ max, by 7 % for ψ Rυ , 2.9 times for κ fam max and 4.2 times for K a with an increase in κ mbgr from 0 to 1 at the degree of filling the chamber with the fill κ br = 0.45. Technological effect of a significant decrease in specific energy intensity and an increase in productivity of the innovative self-oscillatory grinding process in comparison with characteristics of the conventional steady-state process at a decrease in the content of crushed material in the fill was established. A process of milling cement clinker with grinding bo dies at relative size of 0.026 and κ br = 0.45 was considered. A decrease in specific energy intensity by 27 % at κ mbgr = 1, by 38 % at κ mbgr = 0.5625 and by 44 % at κ mbgr = 0 was found. An increase in relative productivity by 7 % at κ mbgr = 1, by 26 % at κ mbgr = 0.5625 and by 39 % at κ mbgr = 0.125 was established. The established effects will make it possible to forecast rational parameters of the self-oscillatory grinding process in a tumbling mill at the variation of the content of the crushed material in the fill Keywords: tumbling mill, content of crushed material in intra-chamber fill, self-oscillations, energy intensity of grinding

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The effects of powder filling on the kinetic breakage parameters of natural amorphous silica

Cited by 9 publications

References 10 publications

Modeling of Bauxite Ore Wet Milling for the Improvement of Process and Energy Efficiency

Modeling of Bauxite Ore Wet Milling for the Improvement of Process and Energy Efficiency

The relationships between the kinetic grinding parameters with interstitial fillings and the liberation degree of a chromite ore

Establishing the effect of decreased power intensity of self-oscillatory grinding in a tumbling mill when the crushed material content in the intra-chamber fill is reduced

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