No abstract

When the cement grinding is performed in the ball mill, the grinding efficiency decreases due to the aggregation of the particles by the electrostatic phenomenon. Therefore, a lot of techniques for preventing agglomeration using various grinding aids have been introduced. In this study, for mineral grinding, the grinding aid composition including a water-soluble aluminate compound and the grinding method in which this grinding aid is used were described. Grinding aids based on aluminate-based compounds not only have high grinding efficiency but are also thermally stable as they are inorganic materials. Compared with the conventional grinding aids based on organic materials such as DEG and TIPA, even if the solid content is half contained, the grinding efficiency is similar and thus the cost can be reduced to half. ÖZÇimento öğütme bilyalı değirmende gerçekleştirildiğinde, öğütmenin verimliliği tanelerin elektrostatik olaylar sonucu topaklanmasıyla azalır. Bu nedenle, çeşitli öğütme yardımcıları kullanılarak aglomerasyonun önlenmesi için birçok teknik geliştirilmiştir. Bu çalışmada, mineral öğütme için, suda çözünür bir alüminat bileşiği içeren öğütme yardımcısı bileşimi ve bu öğütme yardımcısının kullanıldığı bir öğütme yöntemi açıklanmıştır. Alüminat esaslı bileşiklere dayanan öğütme yardımcıları sadece yüksek öğütme verimliliğine sahip olmakla kalmaz, aynı zamanda inorganik malzemeler oldukları için termal olarak kararlıdırlar. DEG ve TIPA gibi organik maddelere dayanan geleneksel öğütme yardımcıları ile karşılaştırıldığında, katı içerik yarıda olsa bile, öğütme verimliliği benzerdir ve bu nedenle maliyet yarıya indirilebilir.

Grinding aids to increase grinding efficiency in cement production are materials that can produce large amounts of high-quality cement in a short time by reducing surface energy by preventing particle agglomeration and improving fluidity. In the paper, a grinding aid using glycerol-waste antifreeze(GAP) is prepared and its effect on the grinding properties of clinker is investigated in contrast to that without the grinding aid. The results are as follows: The angle of repose of the cement powder added with GAP decreases as the grinding time increases (decreases by 3.8° when the grinding time is 60 minutes), indicating that it increases the flowability of the powder. On the contrary, the residual amount of 45µm sieve is also significantly reduced (4.6% decrease) and the specific surface area increases (30.5m2/kg), which results in an increase in the grinding efficiency. In the size range of 3 to 32µm, it increases the particle content, makes the particle size distribution uniform, the 7d and 28d activity index of the powder is improved by 5% and 6%, respectively, and increases the compressive strength of the cement. In addition, it is confirmed that the performance of the TEA grinding aid and the grinding aid are similar, and are very effective in terms of economy.