Application of a Steel-Plastic-Ceramic Composite Centrifugal Pump with Good Corrosion-and Wear-resistance

A type of conveying equipment—steel-plastic-ceramic composite submersible pump with good corrosion-and wear-resistance in corrosive liquid and wearing medium containing ash is introduced. On the flow-passing surface of pump body, pump cover and big impeller, a plastic coating with nano ceramics enhancing plastic coating′s corrosion and wear resistance was deposited. The small impeller was made by stainless steel metal ceramic and sealing ring was manufactured by toughened ceramics. The pump spindle was the stainless steel or titanium alloy segment connected to carbon steel by friction welding. Due to the organic bonding among steel, plastic and ceramic, the pump had the performance of high strength of metal structure, strong anti-corrosion of special plastic and strong wear resistance of ceramic. Thus, the pump achieved good corrosive and wear resistant function by the most cost-effective way. The pump is suitable for removing sulfide and cleaning dust for thermal power plant′s fire coal, and is applicable to convey a liquid containing acid, alkali, salt and ash in the high sulfur coal mine, washing smelter, coking plant, paper factory, oil plant, chemical plant, fertilizer plant, pharmaceutical factory, sewage treatment plant.