Cement ball mill:Research and analysis of mechanical crushing
Date：2013-11-22 02:09:50 ?? Source：Clirik
Mechanical crushing is the fixed materials applied mechanical force, cohesion, overcome material cracked into small pieces of material. The mechanical force imposed by the mechanical crushing, extrusion, splitting force, bending force, shear force, impact, etc., are mostly in the general mechanical two or more comprehensive mechanical force. And physical properties and chemical properties of explosive determines its crushing method, this paper is to introduce crushing explosive method in the research and analysis.
Based on the physical characteristics of explosive, the tensile and shear strength is much lower than the compressive strength, determine the tooth surface of the explosive roll type crushing technology to realize mechanical crushing. Broken tooth surface roll type is given priority to with fracturing effect, both grinding, tooth surface roll type crushing is more important is the feature of the broken products in grain size is less, can minimize the generation of dust.
According to the technical indicators, explosive after crushing particle size for the following 10 mm, can be used in the design of graded broken way to crushing of explosives, each set of roll teeth, tooth shape and roll gap are different, through control of roll speed to meet the technical requirement and specific solutions for: 1 roll speed difference of two roller is large, the broken shearing strength. Less number of teeth, tooth spacing is large, so the first level of roll fully meet the large shear force and "eat in" the needs of the larger volume of explosives. Secondary roll two roller teeth increased, narrow spacing, meet the needs of further broken explosives. Third pole roll profile is disconnected, crossing in the installation and the roller. Through different speed, spacing of narrowed and the change of tooth profile, achieve finally broken powder particle size and efficiency requirements.
In the process of the broken, the strength of the powder particles increases with the decrease of the particle, so roll speed is also increasing step by step.
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