Results 251 to 260 of about 29,812 (304)

Studies on Scale-Up of Ball Mills

Mining, Metallurgy & Exploration, 1984
The impetus for the work described in this paper was provided by difficulties being reported by some operators in obtaining design throughputs in large diameter ball mills. In some cases, it seems that the usual methods of ball mill scale-up based on the Bond work index seriously overestimate the throughput of large diameter ball mills; in other cases,
Whiten, W. J., Kavetsky, A.
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Phases in ball-milled

Journal of Physics: Condensed Matter, 1997
Phases in ball milled for different lengths of time have been investigated by means of x-ray diffraction, Mossbauer spectroscopy and Raman scattering spectroscopy. It was found that the high-temperature phase can be formed by ball milling at room temperature. In the milling procedure the compounds FeSi and were also formed.
Li Tie, Li Yu-zhi, Zhang Yu-heng
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Direct Amidation of Esters by Ball Milling**

Angewandte Chemie International Edition, 2021
Abstract The direct mechanochemical amidation of esters by ball milling is described. The operationally simple procedure requires an ester, an amine, and substoichiometric KOtBu and was used to prepare a large and diverse library of 78 amide structures with modest to excellent efficiency. Heteroaromatic and heterocyclic components are
William I. Nicholson, Fabien Barreteau, Jamie A. Leitch, Riley Payne, Ian Priestley, Edouard Godineau, Claudio Battilocchio, Duncan L. Browne   +7 more
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Ball wear and ball size distributions in tumbling ball mills

Powder Technology, 1985
Abstract The theory of the calculation of the size distribution of the equilibrium mixture of balls in a ball mill is developed. The differential equation is solved for wear laws of the form wear rate per ball ∝ r2 + Δ where r is ball radius. Δ = 0 gives the Bond wear law and Δ = 1 gives the Davis wear law.
L.G. Austin, R.R. Klimpel
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Multifractal properties of ball milling dynamics

Chaos: An Interdisciplinary Journal of Nonlinear Science, 2014
This work focuses on the dynamics of a ball inside the reactor of a ball mill. We show that the distribution of collisions at the reactor walls exhibits multifractal properties in a wide region of the parameter space defining the geometrical characteristics of the reactor and the collision elasticity.
M. A. Budroni, V. Pilosu, DELOGU, FRANCESCO, M. Rustici   +3 more
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Dry ball milling and wet ball milling for fabricating copper–yttria composites

Rare Metals, 2018
Abstract Yttria‐reinforced copper matrix composites were prepared by dry ball milling (DBM) and wet ball milling (WBM), respectively, followed by spark plasma sintering (SPS). It is to determine which milling process is better for fabricating Cu–Y 2 O 3
Fei Huang, Hang Wang, Jin‐Shui Chen, Bin Yang   +3 more
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Mechanochemical decomposition of pentachlorophenol by ball milling

Journal of Environmental Sciences, 2009
The mechanochemical dechlorination of pentachlorophenol (PCP) was studied using CaO and SiO2 powder as additives. The effects of the milling time and additives on the dechlorination rate were investigated. The resulting product was characterized by X-ray diffraction (XRD), Fourier transform infrared spectra (FT-IR), thermogravimetric analysis (TG) and ...
Yinglei, Wei, Jianhua, Yan, Shengyong, Lu, Xiaodong, Li   +3 more
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Ball Mill

2023
Zhang Guowang, Liu Yu, Xu Kuangdi
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Predictive model for ball mill wear

Canadian Metallurgical Quarterly, 1997
Abstract Ball mills, characteristic of the mineral processing industry, are used to reduce ore from one size distribution to another. Wear is associated with comminution mechanisms found in the ball charge which in turn affects grinding performance.
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FeAl alloy disordered by ball-milling

Intermetallics, 1995
Abstract Fe-40 at% Al powder was ball-milled in a planetary mill, and it was found that 8 h milling sufficed to remove all long-range order. The lattice parameter increased by 0.8%, the increase continued somewhat after all X-ray evidence of long-range order had disappeared. The findings are discussed in relation to other methods which have been used
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