Dry grinding of talc in a stirred ball mill

Çayırlı, Serkan

doi:10.1051/e3sconf/20160801005

Cited by 9 publications

(8 citation statements)

References 6 publications

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“…In other words, the powder filling ratio was inversely proportional to the product size. In previous studies, the effect of interstitial filling ratio (U) was investigated in dry feldspar and mica grinding in a stirred ball mill by the author of this study [29][30][31], and similar results were observed. Figure 7 also shows that an increase in the powder filling ratio from 0.05 to 0.15 reduced specific surface area from 3.28 to 2.30 m 2 /g.…”

Section: The Influences Of Powder Filling Ratiosupporting

confidence: 71%

Optimization of Wet Grinding Parameters of Calcite Ore in Stirred Ball Mill

Çayırlı

2018

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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This study focused on ultra-fine grinding of calcite powder (CaCO 3) using a vertical stirred ball mill. The influences of various operating parameters such as stirrer speed (rpm), ball filling ratio (J), powder filling ratio (fc), solid ratio (wt.%) and grinding time were studied under wet conditions. The experiments were carried out in a batch mode of operation. The experimental results were evaluated based upon product size (d 50), specific surface area (m 2 /g) and width of particle size distribution. As a result of this work, the optimum grinding test conditions were found to be 840 rpm for stirrer speed, 0.70 for ball filling ratio, 0.100 for powder filling ratio, 50% for solid ratio and 20 min for grinding time. It was also observed that stirrer speed, ball filling ratio and grinding time were directly proportional whereas powder filling ratio and solid ratio were inversely proportional to product fineness and specific surface area. The width of particle size distribution decreased with decreasing product size for all grinding conditions.

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Section: The Influences Of Powder Filling Ratiosupporting

confidence: 71%

Optimization of Wet Grinding Parameters of Calcite Ore in Stirred Ball Mill

Çayırlı

2018

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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“…Like the other authors, they also mentioned the optimum solids concentration was below 70% for stirred mill operation. Cayirli et al (2012) also supported the findings of the above authors while grinding Sodium Feldspar in a lab scale vertical stirred mill. Mankosa et al (1989) found an optimum slurry density of less than 60% when grinding coal in a vertical stirred mill.…”

Section: Solid Concentrationsupporting

confidence: 88%

“…They also mentioned that the slurry rheological behavior changes with an increase in grinding time due to the production of the fine particles. Cayirli et al (2012) tested the effect of grinding time of 30, 60, 90, 120 and 150 minutes in a batch laboratory pin stirred mill and found that energy consumption increased linearly with the grinding time. However, they did not find the optimum grinding time beyond which fines production is constant in the mill.…”

Section: Grinding Timementioning

confidence: 99%

Process modelling of gravity induced stirred mills

Hasan¹

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Fine grinding is becoming an integral part of mineral processing plants to liberate valuable minerals from fine-grained low-grade ore bodies. Stirred mills are becoming recognized by the industry as a more efficient technology selection compared to the ball mill for fine grinding (< 100 µm). The increasing number of stirred mill installations in mineral processing concentrators has necessitated a process model development that enables full circuit modelling and simulation. Many researchers have developed mathematical models to assist in the design and optimization of the stirred mill operation including gravity induced stirred mills such as the Metso Vertimill and the Nippon Eirich Tower Mill.Most of the developed models lack sufficient responses to changes in process conditions. Furthermore, there is an internal classification effect that is previously mentioned in several publications but was not quantified through experiments. Therefore, a research program was designed and carried out to describe and model different sub-processes related to the operation of the gravity induced stirred mill. The sub-process models (i.e. grinding and internal classification) were combined into a single model structure to represent the operation in a gravity induced stirred mill.During this research, comprehensive test work was carried out in a batch gravity induced stirred mill using Cu-Au ore and limestone to evaluate the effect of operating conditions (i.e. specific energy consumption, slurry density, grinding media size and stirrer tip speed) on particle size and fines generation (-75μm). The test data showed a finer product size when the mill operates at higher specific energy, lower slurry density, smaller grinding media size and higher stirrer tip speed. The test work also identified that attrition breakage mechanism is predominant in the gravity induced mill. Sub-process models that relate the selection function to the process operating conditions were developed. The internal classification effect on mill operation was also measured through test work by using industrial grade silica to identify its effect on the mill operation. The result showed that particle classification takes place inside the gravity induced mill in certain favorable conditions. Models were developed to link the classification parameters and the mill operating conditions to be included in the combined model structure.ii A process model (using a time-based population balance technique) was developed, integrating individual sub-processes models such as breakage, selection and classification functions. The model was validated with industry survey data in different process conditions. The validation result showed that the developed model was capable to predict the mill product size distribution when mill power, feed rate, slurry solids concentration and grinding media size are varied.The thesis has successfully developed a process model of the gravity induced stirred mill with predictive capability. Moreover, it has developed an in-depth understa...

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“…Talc is one of the economic minerals that has several applications. The size of talc particles represents a crucial key in the success of various talc industrial applications (Cayirli, 2016; Kim et al, 2019). To produce the required particle size, mechanical grinding is commonly used for talc, as well as for different minerals (Senthilkumar and Akilamudhan, 2014).…”

Section: Introductionmentioning

confidence: 99%

Aspects of Talc Grinding in the Presence of Sodium Dodecyl Sulfonate

Farag

El‐Midany

2021

J Surfact & Detergents

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In this study, the effect of sodium dodecyl sulfonate (SDS), as a well‐known flotation collector, on talc grinding was investigated using a statistical design in terms of solids%, pH, grinding time, and SDS dosage taking the d80 of the ground product as a response. The results indicated that the factors under study significance order were grinding time > solids% > SDS dosage > pH. In addition, the interactions between solids % and the grinding time and between the solids% and SDS dosage significantly affected the product d80. More interestingly, the presence of SDS not only improves the grinding process at short grinding times but also it enhances the grinding at higher pH values. The optimum conditions for talc grinding are similar in the absence or presence of SDS in terms of factors under study, except for solids%. The vital role of SDS, as a grinding aid, is the production of particles with the same fineness or even finer at higher solids % which leads to an increase in the mill throughput. The smallest d80 was obtained at 60% solids, 60 min, pH 4, and 2 kg t−1 of SDS.

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Dry grinding of talc in a stirred ball mill

Cited by 9 publications

References 6 publications

Optimization of Wet Grinding Parameters of Calcite Ore in Stirred Ball Mill

Optimization of Wet Grinding Parameters of Calcite Ore in Stirred Ball Mill

Process modelling of gravity induced stirred mills

Aspects of Talc Grinding in the Presence of Sodium Dodecyl Sulfonate

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