Effect of operating parameters in stirred ball mill grinding of coal

Mankosa, M.J.; Adel, G.T.; Yoon, Roe‐Hoan

doi:10.1016/0032-5910(89)80084-1

Cited by 40 publications

(14 citation statements)

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“…Karıştırıcı kolları çelikten, karıştırma haznesi polietilenden üretilen değirmenin özellikleri Tablo 2'de verilmiştir. Çelik bilyaların ürünlere rengini verebileceği düşüncesiyle ve mikronize kalsit üretimi yapan tesislerde çoğunlukla öğütücü ortam olarak alümina bilyalar kullanılması nedeniyle, bu çalışma d Al =3,5-4,5 mm (karışım) alümina bilyalar (3,6 Yapılan ön testlerde daha uzun öğütme sürelerinde, malzemenin değirmen çeperine aşırı derecede yapışma eğiliminde olması nedeniyle, deneylerde öğütme süresi 5 dk olarak belirlenmiş ve sabit tutulmuştur. Öğütme deneyleri kesikli şekilde yürütülmüştür.…”

Section: Metotunclassified

“…Karıştırmalı bilyalı değirmenlerin birçok üstünlüğü olması nedeniyle seramik, mineral, madencilik, kimya, gıda, kömür / kok, boya, pigment, plastik, kâğıt kozmetik gibi çeşitli endüstri dallarında yaygın olarak kullanılmaktadır [6][7][8]. Karıştırmalı bilyalı değirmenler çok ince taneleri üretmek için zaman ve hacim başına düşen stres sayısının çokluğu ve uygun stres yoğunluğunu, konvansiyonel ve titreşimli değirmenlere göre daha az enerji tüketimiyle sağlarlar.…”

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Kalsi̇ti̇n Kariştirmali Bi̇lyali Deği̇rmende Kuru Mi̇kroni̇ze Öğütülmesi̇nde Bazi İşlem Parametreleri̇ni̇n Etki̇si̇ni̇n Araştirilmasi

Çayırlı¹

2017

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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ÖZBu çalışmada, kalsitin mikronize boyutlara kuru olarak karıştırmalı bilyalı değirmende öğütülebilirliği incelenmiştir. Bu kapsamda karıştırma hızı, malzeme doluluk oranı, bilya doluluk oranı ve öğütme yardımcısı miktarı parametrelerinin -5 µm malzeme miktarı (%) üzerine etkileri araştırılmıştır. INVESTIGATION OF THE EFFECTS OF SOME OPERATIONAL PARAMETERS ON DRY MICRONIZED CALCITE GRINDING IN A STIRRED BALL MILL ABSTRACTIn this study, dry grindability of calcite to micronized sizes in a laboratory scale stirred ball mill was investigated. Within the context, the effects of parameters such as stirrer speed, powder filling ratio, ball filling ratio and grinding aid dosage on product quantity (-5 µm %) were studied. Experiments were carried out using 2 4 full factorial designs. The main and interaction effects were evaluated using Yates' method. The stirrer speed, ball filling ratio and grinding aid dosage play distinct roles (positive) on product quantity (-5 µm %). Micronized calcite product with a product quantity (-5 µm) of 71.49%, a volumetric surface area of 3.63 m 2 /cm 3 and a mean particle size (d 50 ) of 2.15 µm were obtained in the optimum grinding conditions.

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Kalsi̇ti̇n Kariştirmali Bi̇lyali Deği̇rmende Kuru Mi̇kroni̇ze Öğütülmesi̇nde Bazi İşlem Parametreleri̇ni̇n Etki̇si̇ni̇n Araştirilmasi

Çayırlı¹

2017

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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“…Generally, the trends in the breakage parameters were found to be similar to those for conventional, tumbling ball milling. Mankosa et al [22,24] determined breakage rates for coals in the size range of 20x 140 US mesh ground in a stirred ball mill. The grinding kinetics showed first-order behavior and for a given ball size, the breakage rates followed the trend shown in Figure 1.…”

Section: 1mentioning

confidence: 99%

“…This indicates that the breakage distribution might be flatter for the smaller ball sizes. In a subsequent study (24), the effects of operating variables were analyzed. It was reported that the lower rotational speeds were more energy efficient.…”

Section: 1mentioning

confidence: 99%

A Review of Breakage Behavior in Fine Grinding by Stirred-Media Milling

Hogg¹,

Cho

2000

KONA

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“…Several researchers have reported that fine platelet-like graphite particles were fabricated by exfoliating graphite and inserting a graphite intercalation compound (GIC) between its sheets. [4][5][6][7] Also, some studies on the fabrication of sub-micron-sized graphite particle powders were performed under various degrees of low atmospheric pressure using an attrition mill. [8][9][10][11] These attempts to reduce the size of natural crystalline graphite to nano-scale thickness using a method that uses an attrition mill have not been effective.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Platelet-Like Natural Crystalline Graphite with Nano-Scale Thickness via Layer Distance Expansion

et al. 2009

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Platelet-like natural crystalline graphite with nano-scale thickness was fabricated through low expansion and exfoliation processes. Graphite, as a starting material, had an average particle size of 10 mm. A graphite intercalation compound (GIC) was prepared by mixing sulfuric acid and hydrogen peroxide with the graphite. It was treated at various temperatures and retention times in the furnace to control the expansion ratio, and then ground for size reduction in the attrition mill. The size reduction efficiency increased as the expansion ratio increased to 25 vol%, after which the efficiency decreased again by over 25 vol%. Since the process of size reduction involves repeated exfoliation and expansion of graphite, it revealed a stage-by-stage decrease pattern as the grinding time increased. In this research, the exfoliation rate of platelet-like natural graphite was improved via the low expansion method. Nano-platelet-type graphite with an average particle size of 3 mm was fabricated, but its layer was 20-50 nanometers thick.

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Effect of operating parameters in stirred ball mill grinding of coal

Cited by 40 publications

References 4 publications

Kalsi̇ti̇n Kariştirmali Bi̇lyali Deği̇rmende Kuru Mi̇kroni̇ze Öğütülmesi̇nde Bazi İşlem Parametreleri̇ni̇n Etki̇si̇ni̇n Araştirilmasi

Kalsi̇ti̇n Kariştirmali Bi̇lyali Deği̇rmende Kuru Mi̇kroni̇ze Öğütülmesi̇nde Bazi İşlem Parametreleri̇ni̇n Etki̇si̇ni̇n Araştirilmasi

A Review of Breakage Behavior in Fine Grinding by Stirred-Media Milling

Fabrication of Platelet-Like Natural Crystalline Graphite with Nano-Scale Thickness via Layer Distance Expansion

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