Study and application of the wear-resistant armoring technology for protection of belt conveyor

During the delivery of materials, wear of belt of conveyor may cause accidental shutdown of belt and wearing of a large number of parts—a problem which has so far failed to be tackled for lack of better solutions, and the use of the technologies currently available to restore the worn belt fail to produce the desired result. Based on the abrasion resistance theory, and in line with the characteristics of abrasion wear of conveyor belt, the technology for repair of belt's wear points with highly wear-resistant armor coat is developed. Through applying a tough and wear-resisting coat consisting of high-density hard particles onto belt's wearing part can lead to higher wear-resisting capacity and extended service life of belt. Result of test on site shows that the bonding strength between the matrix phase and belt's rubber material is up to the grade-1 level while that between the matrix phase and reinforcing phase can reach above the grade-3 level; for a 90 000 t/d—capacity clean coal steel-core belt conveyor, after the belt keeps running for a period of 300 days, the armor coats are all below 1% in falling-off rate with a abrasion thickness of less than 0.5 mm, and the belt can sustain a service life of over 6 years. Result of field application shows that by using this technology, the wearing of the spill aprons and the discharge end over a large area can be effectively remedied; after the repaired belt runs for a period of 12 months, the armor coats are observed to have a rate of detachment of below 0.5% and a wear rate of below 20%, and their expected lifespan can reach over 5 years; and the technology can be easily and rapidly applied, and proves to be an ideal approach for remedy of wearing belt.