Method for testing absorption energy of ore by using drop hammer impact

Abstract

The invention relates to a method for testing absorption energy of ore by using drop hammer impact. The method comprises the following steps of establishing a physical model for impacting ore by a drop hammer, wherein the drop hammer freely falls to impact a test piece, a part of impact energy is converted into absorption energy of the test piece, a part of energy is transmitted to the base and islost in downwardly moved kinetic of the base, and a part of energy is lost in rebounding kinetic energy of a hammer head when the hammer head rebounds after impact; converting the kinetic energy andthe gravity working of the base into the deformation energy of a spring, and calculating lost energy of the base by monitoring the movement displacement of the base by combining an elastic coefficientof the spring; calculating the lost energy of the hammer head by monitoring the initial speed of the rebounding of the hammer head, and then obtaining the absorption energy of the ore through an energy conservation principle. Through the method disclosed by the invention, the absorption energy of the ore in any shape in the crushing can be tested, the applicable ore size range is wide, and the theoretical relation of the ore crushing energy and the granularity established by using the method more meets an actual condition of the mechanical crushing, the crushing process is favorably guided toimprove, the energy utilization efficiency is improved, and the crushing energy consumption is reduced.

Description

technical field [0001] The invention relates to a method for testing ore absorption energy by using a drop hammer impact, which belongs to the field of mining engineering crushing and is particularly suitable for research on ore crushing energy characteristics. Background technique [0002] The energy consumption of ore crushing in my country and even in the world is huge. The energy consumed by the crushing and grinding operations of the dressing plants in my country has reached more than 5% of the total energy consumption in the country, and the power consumption for crushing and grinding in the world accounts for 3% of the total power consumption. ~4%. At present, the energy utilization rate of ore crushing is low, and the energy consumption per unit of crushing is too high, resulting in a large amount of energy waste, serious environmental pollution, high production costs of mining enterprises, and affecting social and economic benefits. Explore the scientific law of ene...

AI Technical Summary

Problems solved by technology

Other devices used to study the characteristics of single particle impact crushing include pendulum impact testing machine and rotary impact crusher. The adjustable energy range is small, and the operation is inflexible; the rotary impact crusher is not ideal for crushing hard ore

[0004] Under the technical background of urgently needing to improve the energy utilization efficiency in the crushing process and reduce the energy consumption per unit of crushing, and to study the characteristics of ore crushing energy change, the above devices and methods for testing the energy absorption of ore have certain limitations, and it is necessary to study a A new universal method for testing the energy absorbed by ores

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