Heavy-medium coal beneficiation is a highly efficient method of coal beneficiation, with the mechanization of coal mining, the raw coal gangue content increases, the coal quality deteriorates, heavy-medium coal beneficiation is more rapid development.

However, the heavy media cyclone equipment and material wear and tear is serious, need to be frequently adjusted or even replaced, affecting the quality and efficiency of coal beneficiation. Not only relates to the economic benefits of coal processing plant, but also affects the reliability of production and environmental health of the workshop.

Wear mechanism of cyclone

Heavy media cyclone in the work, by the coal particles, magnetic iron powder and water slurry composed of rotating movement in the cyclone, resulting in a very large centrifugal force. Under the action of centrifugal force, the inner wall of the cyclone is subject to high-speed material erosion, especially the density of gangue under the action of centrifugal force is thrown to the wall, resulting in the inner wall of the cyclone in the violent scouring of the wear and tear is very serious, resulting in the structural damage to the key parts of the cyclone, resulting in changes in the internal flow field of the liquid stream, turbulence of rotating flow of the normal process of separation, and reduce the separation efficiency.

Comprehensive analysis of the cyclone wear, here both micro-cutting wear, impact wear and surface fatigue wear and corrosion wear, different parts of the wear mechanism is different. According to practical experience, the cyclone's mouth, cone section, connecting pipe, pipe, as well as pumps and valves wear quite seriously.

Current problems with cyclone liners

Currently heavy media cyclone widely used alumina ceramics as a lining material, from the actual use of the situation, ordinary alumina ceramic in the diameter of less than 700mm small and medium-sized cyclone lining effect is still possible, but for the diameter of more than 1,000mm heavy media cyclone, the ordinary oxide ceramic lining has been unable to do anything, showing no abrasion resistance, cracking, flaking, etc. phenomenon.

Analyze the reason, mainly because the coal slurry contains large gangue, which causes large impact on the cyclone cylinder wall. According to the theory of wear and tear, in the case of large impact, the toughness of the material plays a key role. And ordinary alumina ceramics brittle, not to mention the mixed market, some inferior products to the second best, with high alumina porcelain to replace corundum ceramics.

Westtop wear-resistant materials for cyclones

Westtop comprehensively analyzed the various factors affecting the wear of the cyclone, and developed various series of wear-resistant ceramics such as alumina ceramics/zirconia ceramics/alloy ceramics/titanium ceramics/silicon carbide ceramics, etc., which have a comprehensive performance that exceeds most of the ceramics available on the market, and can almost solve most of the wear problems caused by the wear mechanism.

Performance Characteristics

• Very high hardness

• Very high toughness

• Very high abrasion resistance

• Life expectancy is more than 5 times that of ordinary alumina ceramics

• Customized for cyclone design, from materials to construction