Open and closed circuit dry grinding of cement mill rejects in a pilot scale vertical stirred mill

Pilevneli, C.C.; Kizgut, Sait; Toroğlu, İhsan; Cuhadaroglu, Dilek; Yiğit, E.

doi:10.1016/j.powtec.2003.12.002

Cited by 29 publications

(11 citation statements)

References 4 publications

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“…As the stirrer speed is increased, both the specific surface area and product fineness increased. It was observed by many studies that increasing stirrer speed produces a finer product and larger surface area [4,6,21].…”

Section: The Influences Of Stirrer Speedmentioning

confidence: 99%

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 Stirrer Speedmentioning

confidence: 99%

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

Çayırlı

2018

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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“…Many parameters may influence the outcomes of dry grinding in stirred media mills. It is possible to classify such parameters as the mill's design properties (e.g., impeller types, the features of impeller arms, the length/diameter ratio of the mill, the orientation of the shaft), vertical [6][7][8] or horizontal [9][10][11][12] 2 of 11 and operating parameters (e.g., grinding time [7,[13][14][15], stirrer speed [6,9,13,[15][16][17][18], media loading, type and size [13,19,20], grinding type. The information obtained from these studies shows that dry stirred media mills are still in an early to intermediate stage of development.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Operating Parameters on Dry Grinding of Calcite in a Stirred Media Mill Using the Box-Behnken Design

Katircioglu-Bayel

2020

Minerals

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The optimization of the operating parameters of a stirred media mill in the dry grinding of calcite was investigated. A three-level Box-Behnken design was used for the purpose of examining the impact of four independent factors, the stirrer speed (SS), grinding time (GT), media filling ratio (MFR), and solid mass fraction (SMF), on the product particle size (d50). For the purpose of establishing an empirical correlation between operating parameters and responses, a series of experiments were carried out. Variance analysis showed a reasonably good value for d50 (R2 = 0.965). According to the software solutions, the optimum conditions for minimizing the d50 size were found to be 573 rpm stirrer speed, 11.18 min grinding time, 63% media filling ratio, and 11.52% solid mass fraction, with 3.78 µm for the d50 size. To verify the improvement of grinding, verification tests were performed using the above-mentioned optimum conditions and the average d50 size and standard deviation were found to be 3.83 µm and 0.025, respectively. The average d50 value obtained was smaller than those obtained in the 27 tests. Furthermore, when the optimum result obtained from the experiments was compared with the result obtained using the software, a 22% energy saving was achieved. The impacts of grinding on the structural characteristics of calcite particles were characterized by XRD analysis. XRD measurements indicated that no change was observed in the peak areas of ground calcite specimens compared to the untreated calcite specimen.

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“…The methods discussed above focus on the incorporation of foreign nanoparticle in the cement system. However, very limited reports are available based on the production of ultrafine cement by physicomechanical crushing of the conventional cement particle [15][16][17]. Table 1 summarizes various procedures used for making of the nanocement and their application.…”

Section: Introductionmentioning

confidence: 99%

“…Table 1 summarizes various procedures used for making of the nanocement and their application. Based on the critical literature survey, it is assessed that the fine cement of the particle size 200-2 m can be produced by the grinding of the cement using ball mill, vibration mill, Raymond mill, mixing mill or air-blow mill, stirred mill, and so forth [15][16][17]. Accordingly, it is also reported that due to the milling of the cement, surface area of the cement particle increases; consequently, agglomeration of the particle occurs.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of the Top‐Down Nanotechnology in the Production of Ultrafine Cement (~220 nm)

Chakraborty

Kim

et al. 2014

Journal of Nanomaterials

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The present investigation is dealing with the communition of the cement particle to the ultrafine level (~220 nm) utilizing the bead milling process, which is considered as a top-down nanotechnology. During the grinding of the cement particle, the effect of various parameters such as grinding time (1–6 h) and grinding agent (methanol and ethanol) on the production of the ultrafine cement has also been investigated. Performance of newly produced ultrafine cement is elucidated by the chemical composition, particle size distribution, and SEM and XRD analyses. Based on the particle size distribution of the newly produced ultrafine cement, it was assessed that the size of the cement particle decreases efficiently with increase in grinding time. Additionally, it is optimized that the bead milling process is able to produce 90% of the cement particle<350 nm and 50% of the cement particle<220 nm, respectively, after 6.3 h milling without affecting the chemical phases. Production of the ultrafine cement utilizing this method will promote the construction industries towards the development of smart and sustainable construction materials.

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Open and closed circuit dry grinding of cement mill rejects in a pilot scale vertical stirred mill

Cited by 29 publications

References 4 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

Optimization of Operating Parameters on Dry Grinding of Calcite in a Stirred Media Mill Using the Box-Behnken Design

Effectiveness of the Top‐Down Nanotechnology in the Production of Ultrafine Cement (~220 nm)

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