Results 261 to 270 of about 40,507 (302)

Comparison of simultaneous wet milling and enzymatic hydrolysis of cellulose in ball mill and attrition mill reactors

Biotechnology and Bioengineering, 1990
AbstractSimultaneous wet milling and enzymatic hydrolysis of newsprint in a ball mill reactor (BMR) and in an attrition mill reactor (AMR) were studied. The effect of milling on the enzyme deactivation was also investigated. Variables studied included milling media size, material, and the presence or absence of an air–liquid interface in the reactor ...
P W, Furcht, H, Silla
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An overfilling indicator for wet overflow ball mills

Minerals Engineering, 2016
The lack of constraints in ball mill capacity in the published ball mill models may result in unrealistic predictions of mill throughput. This paper presents an overfilling indicator for wet overflow discharge ball mills. The overfilling indicator is based on the slurry residence time in a given mill and given operational conditions.
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An investigation of wet grinding in a laboratory overflow ball mill

Mining, Metallurgy & Exploration, 1989
Batch breakage kinetic tests were performed in a mill of 0.3 m diameter for a range of mill conditions. Accurate simulation required the measurement and use of factors which accelerated the specific rates of breakage of the top sizes as finer material accumulated in the slurry.
L. G. Austin, R. C. Klimpel
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Kinetics of fine wet grinding in a laboratory ball mill

Powder Technology, 2001
Abstract The kinetics of batch wet grinding of quartz from a feed of 600×425 μm to a product of 80% less than 8 μm have been determined using sieving and laser diffractometer sizing for size analysis. A dispersing agent was added while proceeding to longer grinding times to prevent particle agglomeration in the mill.
Yekeler, M, Ozkan, A, Austin, LG
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Grinding kinetics of quartz and chlorite in wet ball milling

Powder Technology, 2017
Abstract Under an invariant and self-similar mill environment, batch wet grinding studies were carried out by grinding mono-sized fractions of quartz, chlorite and their binary mixture at different blending ratios. The results obtained indicate that the breakage behavior of both minerals as well as their mixture followed a first-order model.
Ruichao Zhao, Yuexin Han, Mingzhao He, Yanjun Li   +3 more
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Modelling Continuous Wet Ball Mill Grinding

IFAC Proceedings Volumes, 1974
Two models of continuous wet ball mill qrinding are presented. The first is well suited for simulation of the grinding process, the second intended for use in mill circuit control systems.
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Fine wet grinding of an alumina hydrate in a ball mill

Powder Technology, 1998
Abstract An experimental study on fine wet milling of an alumina hydrate in a batch ball mill has been carried out. The effect of experimental conditions of grinding have been determined showing that the size reduction rate is mainly affected by the fluidity of the slurry.
C Frances, C Laguerie
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Polymorphic Transformation of PbO by Isothermal Wet Ball‐Milling

Journal of the American Ceramic Society, 1971
Mechanochemical polymorphic transformation of massicot to litharge was achieved by isothermal wet ball‐milling. A first‐order relation was observed between the fractional conversion and the milling time; the apparent activation energies for various milling conditions were obtained by kinetic treatments.
MAMORU SENNA, HIROSHI KUNO
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Acceleration and deceleration of breakage rates in wet ball mills

International Journal of Mineral Processing, 1992
Abstract Wet grinding is a nonlinear process and hence, estimation of breakage rates based on the linear model cannot be strictly used. Also the use of a functional form for breakage rates in an estimation scheme can produce artificially unrealistic values.
R.K. Rajamani, D. Guo
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On the analysis of fine wet grinding in a batch ball mill

The Chemical Engineering Journal and the Biochemical Engineering Journal, 1996
Abstract The influence of the slurry density on the fine wet grinding performances of a batch ball mill was examined for an alumina hydrate feed. Irrespective of the operating conditions, the size reduction process proceeds fast in the first period of grinding (20 min); then its rate progressively reduces and after 1–2 h the size of the product ...
C. Frances, C. Laguerie, MAZZAROTTA, Barbara, T. Veccia   +3 more
openaire   +2 more sources