This paper presents a solution for the detection and control of coal loads that is more accurate and convenient than those currently used. To date, no research has addressed the use of a grinding medium as the controlled parameter. To improve the accuracy of the coal load detection based on the kinetic energy of balls in a tubular ball mill, a Discrete Element Method (DEM) model for ball kinema...

The parameters of mill load (ML) not only represent the load of the ball mill, but also determine the grinding production ratio (GPR) of the grinding process. In this paper, a novel soft sensor approach based on multi-spectral segments partial least square (PLS) model and on-line adaptive weighted fusion algorithm is proposed to estimate the ML parameters. At first, frequency spectrums of the s...

Generally, crash stops are performed to obtain measurement of charge filling and slurry loading. The crash stop involves running the mill under steady state then cutting off all feed streams to the mill as it is being stopped. Sufficient time is required to obtain all the important measurements correctly during the crash stop. The mill filling should be measured at a minimum of 3 points along t...

A solvent-free palladium-catalyzed ortho-iodination of acetanilides using N-iodosuccinimide as the iodine source has been developed under ball-milling conditions. This present method avoids the use of hazardous organic solvents, high reaction temperature, and long reaction time and provides a highly efficient methodology to realize the regioselective functionalization of acetanilides in yields ...

An instantaneous rigid force model for prediction of cutting forces in ball-end milling of  sculptured surfaces is presented in this paper. A commercially available geometric engine is used to represent the cutting edge, cutter and updated part geometries. The cutter used in this work is an insert type ball-end mill. Intersecting an inclined plane with the cutter ball nose generates the cutting...

This study's aim is to investigate the wet and dry grindability of K-feldspar in a narrow grain size range stirred ball mill. In evaluation grinding process, full factorial design was used observe effects selected parameters on dependent variable. On grinding, parameter such as diameter, stirring speed, time, interstitial filling ratio were investigated. Experimental results showed that can be ...

In the paper sorption capacity of shungite rocks Koksu field (Kazakhstan) in relation to oil from Karazhanbas and Tengiz fields were studied. Oil spills occurring during production, gathering, transportation, storage refining, repair work on wells are an urgent environmental problem. There effective methods soil purification, including particular interests addressed process. The aim this resear...

Gearboxes are frequently used in the mining industry, especially for power transmission between electric drive and ball mill; besides extreme complexity of a mill gear system, fault diagnosis by vibration analysis can be easily distorted presence impulsive noises due to pulses on shell. Although several works literature related influence an noise accuracy diagnosis, no dynamic model exists yet ...

In this paper, the production of Al2O3-Mo nano-composites via mechanical milling was investigated. Molybdenum and alumina powders with certain ratios were grounded in a planetary ball mill at different times. XRD technique was used to determine the crystallite size of the milled powders. The microstructure of milled powders was studied using optical and electron microscopes. The crystallite siz...