In scenarios such as mining beneficiation, tailings discharge, metallurgical concentrate transportation, and river dredging, the slurry medium contains a large amount of high hardness particles such as quartz sand and iron concentrate, which form continuous "cutting" and "impact" dual wear on the pipe wall under high-pressure and high-speed flow. Ordinary rubber hoses wear through within a few months under such working conditions, and frequent replacement becomes a heavy burden on operating costs. The slurry conveying hose lined with ultra-high molecular weight polyethylene (UPE) is a professional solution for this working condition - using the ultimate wear resistance of UPE material to construct an anti erosion barrier, using chemical inertness to resist acid and alkali erosion, and using steel wire weaving to enhance the bearing capacity of high-pressure pulses, becoming a reliable channel for "anti erosion and long service life" in mining and heavy industry slurry conveying. 1、 The "anti erosion code" of UPE lining: molecular chain structure and super wear resistance Ultra high molecular weight polyethylene (UPE, also known as UHMW-PE) has a molecular weight of over 3 million, with extremely long and highly ordered molecular chains, endowing the material with excellent anti sliding friction properties. Actual test data shows that the wear resistance of UPE is 7 times that of carbon steel, 5 times that of stainless steel, 6 times that of nylon, and 5 times that of polytetrafluoroethylene. Under typical working conditions of slurry transportation, this wear-resistant advantage is reflected in an extremely slow wear rate. Taking the transportation of iron concentrate slurry with a concentration of 60% and a particle size of ≤ 5mm as an example, the wear rate of UPE lining is only 0.03mm/thousand hours, and the service life can reach 8-10 times that of ordinary rubber pipes. A certain copper mining enterprise used UPE lined hoses to transport acidic slurry with a pH value of 2-3. After continuous use for 18 months, the inner wall remained smooth without obvious corrosion pits or wear grooves. The self-lubricating properties of UPE lining further reduce erosion damage - its friction coefficient is only 0.07-0.11, which is more than 60% lower than that of metal pipes. Particles in the slurry are less likely to adhere to the inner wall and form vortex erosion when passing through, reducing the source of wear from the source. At the same time, its impact resistance is 10 times that of ordinary polyethylene pipes, and it can withstand the huge water hammer impact formed during the start and stop of pump stations without cracking or damage. 2、 Chemical inertness and wide temperature range: dual compatibility of corrosion and extreme cold Mining slurry often has acid-base corrosiveness (such as sodium cyanide solution in gold cyanide process, copper ore acidic slurry, and high concentration alkaline solution in bauxite). UPE belongs to a saturated molecular cluster structure with extremely high chemical stability. It can withstand various corrosive media (acids, bases, salts) and organic solvents within a certain temperature and concentration range. In sulfuric acid with a concentration less than 75% and nitric acid with a concentration less than 20%, the performance of UPE will not change. UPE lining also has excellent low-temperature resistance, maintaining good flexibility in the ambient temperature range of -40 ℃ to+80 ℃, without the common low-temperature brittleness phenomenon of ordinary rubber. It still has ductility at a liquid helium temperature of -269 ℃, which makes the hose suitable for use in winter mines in northern high-altitude regions. Actual working condition tests have shown that UPE lining has good resistance to strong corrosive media such as 98% concentrated sulfuric acid, 37% hydrochloric acid, sodium hydroxide, as well as organic solvents such as benzene and esters, which can effectively avoid performance degradation caused by swelling of traditional rubber. 3、 Three layer composite structure: system integration of wear-resistant lining, steel wire reinforcement, and weather resistant outer adhesive The UPE ultra wear-resistant slurry conveying hose adopts a three-layer composite structure design, with each layer performing its own duties, forming a complete protection system of "wear-resistant pressure resistant weather resistant". The inner lining layer is made of ultra-high molecular weight polyethylene (UPE) material with a thickness of 3mm or more, which directly contacts the slurry medium and undertakes the core functions of anti erosion and corrosion resistance. The reinforcement layer adopts a high-strength steel wire weaving or winding structure, with multiple high carbon steel wires interwoven in a staggered manner. The working pressure can reach 300psi to 35MPa, and the blasting pressure is more than three times the working pressure, ensuring that the pipe body does not deform or burst under high pressure pulses. The outer rubber layer is a high elastic weather resistant synthetic rubber, which is tear resistant, anti-aging, acid and alkali resistant. It can easily adapt to the complex site environment such as open pit mines, dust damp, acid and alkali corrosion, and resist the damage caused by ultraviolet rays and mechanical bumps. In terms of installation and application, the weight of UPE hose is only 1/5 of the same specification steel pipe, and two workers can complete the laying of a hundred meter pipeline; The flexible pipe design can adapt to complex terrain, especially suitable for mobile operations in open-pit mines. In terms of energy conservation and environmental protection, the friction coefficient of UPE inner wall is low. After a certain iron ore beneficiation plant switched to this type of hose, the energy consumption of slurry transportation decreased by 22%. The end connection usually adopts a buckle flange or union joint to ensure that the joint will not loosen under pressure pulsation conditions. In summary, the slurry conveying hose lined with ultra-high molecular weight polyethylene (UPE) perfectly meets the systematic needs of mining and heavy industry slurry conveying for "wear resistance, corrosion resistance, and long service life" with its UPE molecular chain level super strong wear and erosion resistance, saturated molecular structure acid-base corrosion resistance, and three-layer composite structure high-pressure pulse bearing three core technologies. From extending the lifespan of iron concentrate by 8-10 times to stable operation of copper ore acidic slurry for 18 months, from -40 ℃ extreme cold flexibility to 35MPa high-pressure bearing, every material selection and structural detail points to the same goal: providing reliable guarantees for slurry transportation that can withstand flushing and corrosion on the ore crushing and slurry rushing beneficiation line.