Here are some knowledge about heavy medium coal selection - Heavy medium coal selection

Below, I will explain some knowledge about heavy medium coal selection

Application of Spray Polyurethane Wear resistant Material in Heavy Medium Coal Preparation

At present, among many coal preparation processes, heavy medium coal preparation is an efficient and widely used method. All countries have invested huge research efforts in this field, with most of the research focusing on heavy medium coal preparation technology and supporting facilities. However, in the heavy medium cyclone coal preparation process, the wear resistance of components such as the cyclone liner, arc-shaped screen plates, desizing screen plates, centrifuge screen baskets, and various pipelines that are severely eroded by solid-liquid two-phase flow greatly affects the reliability of the heavy medium coal preparation process and seriously affects the economic benefits of coal preparation plants.

The wear mechanism is a complex physical and chemical process, and the wear of heavy medium coal preparation equipment and pipelines belongs to erosion wear under low stress. The working surface of the equipment's flow-through components mainly undergoes deformation wear and cutting wear caused by the impact and wear of hard abrasives, as well as cavitation.
In order to solve this type of wear and corrosion, spray polyurethane material can be used to protect the equipment. This material can not only effectively resist erosion, cavitation wear, and corrosion wear, but also withstand strong acid and alkali corrosion with a pH value of 3-11. This material can not only protect the surface of machine parts from water erosion and cavitation, but also protect machine parts from acid and alkali erosion. It can be said to be a truly universal surface treatment material, effectively filling this gap. This material has a wide range of applications and is widely used in various industrial fields that require anti-corrosion and wear-resistant protection, and has achieved good results. Practice has proved that the combination of this material with the substrate is very strong, and the service life of the coating is generally more than ten times longer than that of ordinary metal materials, with significant economic benefits.

Heavy medium coal selection process

Coal is an industrial raw material and important energy source, occupying a very important position in the development of the national economy. In the disposable energy consumption structure, the pattern of coal as the main energy source will not change in the short term. With the development of clean coal technology in China, the proportion of raw coal in China is also increasing. Currently, the production of raw coal has reached 1.1 billion tons, accounting for more than 43% of the total raw coal production. However, the research on heavy coal preparation technology in China began in the mid-1950s. During the "15th Five Year Plan" period, under the guidance of the Party Central Committee's policies and the driving force of the economic market, China's heavy medium coal preparation technology developed rapidly, and new equipment and technologies with independent intellectual property rights were developed, which improved the economic benefits of coal enterprises and the heavy medium coal preparation technology. The promotion and application have made outstanding contributions.

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