Experiment device for testing rock breakage and method for calibrating impact speed and loss energy

Abstract

The invention relates to an experiment device for testing rock breakage and a method for calibrating impact speed and loss energy. The device mainly comprises a test piece chamber, an impact loading system and an experimental test system, wherein a multi-granule rock test piece is arranged in the test piece chamber; the impact loading system comprises a test pole, an emission bar, an emission sleeve and an air compression system; the experimental test system comprises a linear speed meter, a strain gauge, a dynamic strain gauge and an oscilloscope. The method for calibrating impact speed and loss energy comprises the steps of recording the impact speed of a piston by using the linear speed meter and the oscilloscope; respectively recording the time-variable signals of shock-loaded waves and reflected waves in the test pole by time using the dynamic strain gauge and the oscilloscope; calculating the collected data to obtain the energy loss in an experiment process. After the device andthe method are adopted, the relationship between rock breaking effect and energy consumption can be studied under the different loading rates by changing the air pressure. The simulation experiment device has the characteristics of being simple in structure, high in simulation authenticity and good in repeatability of a test process.

Description

Technical field [0001] The invention relates to an experimental device for testing rock crushing and a method for calibrating impact velocity and energy loss, and belongs to the technical field of rock crushing research and testing. Background technique [0002] Rock fragmentation is a very important part of the mining and metal smelting process. The process usually uses a pair of hardened ferroalloy surfaces to break large pieces of rock to obtain fine rock particles. According to statistics, the world produces more than 3 billion tons of various metal ores each year. These ores are usually crushed in a rock crusher before subsequent processing. Rock fragmentation is not only a subject of theoretical research, but also an important subject of practical application research in production. In practical engineering applications, rock crushability is usually used as a quantitative index to judge the ability of rock to resist mechanical crushing in the crushing process. It is the m...

AI Technical Summary

Problems solved by technology

First of all, the existing device does not take into account the impact of the extrusion of rock particles and ferroalloy surfaces and the extrusion of adjacent rock particles, resulting in the inability to accurately reflect the real rock crushing process; secondly, the existing test device does not consider the impact velocity of the equipment on the rock broken effect

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