The characterization of slurry rheology using average torque drawn by tumbling ball mills has been reported . Zheng et al. measured the relationship of the torque of a stirred media mill versus grinding time to characterize slurry rheology in wet ultrafine grinding in order to reveal the effect of grinding aids on the slurry rheology.
It is a type of planetary ball mill planetary mill or bead mill. Introduce balls also called beads which are grinding media into a grinding container together with slurry. The grinding container revolves clockwise at a high speed with a 45 tilt angle while rotating counterclockwise at the same time see “Mixing” .
A laboratory ball mill was lined with 12 pieces of trapezium lifters loaded with J b = 25% grinding ball and worked at different mill speeds and slurry filling. The test was applied the iron ore to form the slurry and covered a range of slurry filling from U = 0 to U = 3.
The effect of slurry density on the dynamics and grinding behavior of a batch ball mill was studied using quartz as a test material. It was found that slurry density determined the distribution of solid charge in the mill with migration of particles from the tumbling zone to the mill periphery as solid concentration was progressively increased.
media charge. Lastly a laboratory mill was used to run batch grinding tests on a Platinum ore for slurry fillings U between 1.0 and 3.0 and at 65 % solids content. Two ball fillings were considered for identical slurry volumes: J = 20 % and 30 %. Results showed that not only did the proposed pool model work well using an artificial slurry in
measure both ball load and pulp slurry positions inside a running mill. The main data are provided in terms of toe and shoulder angles. Figure 6. The pulp density is an important parameter which influences the grinding efficiency. In iron ore for instance a variation of 2 to 3% solid content in the slurry could lead to a
A database of slurry residence time collected from industrial ball mills was established and used to investigate the typical range of the volume-based slurry residence time in a normal industrial ball mill operation and to set up an onset point for ball mill overfilling warning in the specific energy-based ball mill model Shi and Xie 2016 .
6. Slurry transport and charge mixing in a wet ball mill 6.1. Grinding with an overflow ball mill. The previous ball mill study was performed for a dry mill. Here we consider an overflow ball mill with feed and discharge of slurry as well as resident slurry included. This is modelled using the fully coupled DEM SPH method.
article osti 276693 title = Fluid mechanics of slurry flow through the grinding media in ball mills author = Songfack P.K. and Rajamani R.K. abstractNote = The slurry transport within the ball mill greatly influences the mill holdup residence time breakage rate and hence the power draw and the particle size distribution of the mill product.