Comparison of equipment for grain sampling

ABSTRACT Grain sampling requires the use of appropriate and accurate equipment. This study aimed to compare grain samplers, manual and mechanical, used in the sampling of soybean loads, during their reception by storage units. The used devices were the manual sampler with 1.80 m length and three opening stages, 2.10 m length and three opening stages; and 2.10 m length and one opening stage, besides the mechanical sampler (pneumatic) and the pelican sampler. The analyzed parameters were the contents of impurity, broken grains, pods, immature grains, and moisture. The significance of effect of treatment was determined by F Test and the means were compared by Tukey test (p < 0.05). The devices used for sampling of soybean grains in vehicles, during their reception by storage units, affect the determination of broken grains, pods and immature grains. However, there was no difference between the types of sampling equipment in the determination of impurity content, and the pelican sampler collected greater percentages of pods and immature grains from the sampled vehicles.

Management and engineering solutions to improve stripping equipment efficiency in Chernogorksy open pit mine

Chernogosky open pit mine integrates truck-and-shovel system of mining with overburden rehandling to internal dump with a set of walking excavators for rehandling of overburden to mined-out area of the pit. It is possible to improve efficiency of stripping in the conditions of Chernogorsky OPM by reducing percentage of stripping with more expensive handling system. The relevant research and solutions to this effect are presented in this article. Comparative characterization of mining conditions and parameters of mining systems applied is given for open pit mines Chernogorsky, Turnui, Nazarovsky, Vostochno-Beisky and Izykh. The comparative analysis points at the need to account for difficulty of mining and process sites in comparison of equipment productivity. High concentration of mining machines, which is conditioned by narrow mining front and simultaneous operation of five faces, as well as blasting operation implemented every 1-2 days, are recognized as the main constraints of excavator capacity in mining with direct dumping in Chernogorsky open pit mine. The management and engineering solutions implemented in the mine and resulted in higher efficiency of draglines are described.

French Approach to IFR Aerodromes

This article focuses on the comparison of equipment requirements for IFR aerodromes across Europe. The aim is to show to the reader that despite the single European, respectively global regulations it is still possible to find significant differences in the rules of individual states. The article describes an analysis executed at the Department of Air Transport.

Selection and comparison of equipment for deagglomeration processes

Selection and comparison of equipment for deagglomeration processes The unique properties of nanoparticles and nanoparticle clusters show high potential for nanomaterials to be formulated into numerous products. In this paper, nanosuspensions are formulated by braking up agglomerates in high-shear flows. The flows are generated in the specific equipment, and this paper serves as a guide for equipment selection based on mechanistic modelling. A general model based on the power input to the system is formulated to model agglomerate disintegration in different types of equipment including stirred tanks, the rotor-stator disintegrators, the high-pressure nozzle systems and bead mills. The results of computations based on the rate of energy dissipation are presented in terms of the specific energy input, which is typical of industrial applications. In the considered deagglomeration devices the stresses are generated due to various mechanisms including the effects of hydrodynamic stresses, cavitation and bead collisions. The model includes the effects of agglomerate structure on the suspension viscosity. The results of the simulations are compared with the experimental data.