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Sensitivity of oil shale particle surface to the applied load in ball mill
International Journal of Coal Preparation and Utilization ( IF 2.1 ) Pub Date : 2021-07-01 , DOI: 10.1080/19392699.2021.1946801
N. Khairy 1, 2 , I. Abu El-Magd 2 , S.E. El-Mofty 1 , A.A. El-Midany
Affiliation  

ABSTRACT

The size reduction is a mandatory step in oil shale processing. In this study, the sensitivity of oil shale and its organic matters to the applied load in grinding was tested in a ball mill not only by using the different number of grinding media balls as an effective load but also by using balls made of two materials, namely, steel and ceramic. The ground product was characterized in terms of its mean size (d50) as well as it was subjected to flotation tests, and the properties of the floating product in terms of the loss-on-ignition and recovery percentages were determined. Furthermore, the Fourier transform infrared (FTIR) was used to show how the grinding media load can affect the surface properties of the ground product and correlate that to the flotation results. The results indicated that a delicate grinding load is needed for this sample of oil shale. The higher the load, the lower the loss-on-ignition (LOI) of the ground product and the lower the d50 of the ground product, and its higher recovery in flotation proposes that the produced fines are rich in gangue minerals of inorganic nature.



中文翻译:

油页岩颗粒表面对球磨机外加载荷的敏感性

摘要

减小尺寸是油页岩加工中的强制性步骤。在这项研究中,在球磨机中测试了油页岩及其有机物对研磨施加载荷的敏感性,不仅使用不同数量的研磨介质球作为有效载荷,而且使用两种材料制成的球,即钢和陶瓷。研磨产品的特征在于其平均尺寸(d 50) 并对其进行了浮选试验,并确定了浮选产品在烧失量和回收率方面的性能。此外,傅里叶变换红外 (FTIR) 用于显示研磨介质负载如何影响研磨产品的表面特性并将其与浮选结果相关联。结果表明,该油页岩样品需要精细的研磨负荷。负荷越高,磨碎产品的烧失量 (LOI) 越低,磨碎产品的 d 50越低,其浮选回收率越高,表明产生的细粉富含无机脉石矿物.

更新日期:2021-07-01
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