XS Split-Case Pump Casing Wear-Resistant and Corrosion-Resistant Customization for Songtao Sanhe Manganese Industry ｜ Songtao, Guizhou

Application Scenario: Located in the core manganese triangle production area of Songtao, Tongren, Guizhou, with an annual output of 50,000 tons of electrolytic manganese metal. The plant is equipped with five major water circulation systems including manganese ore leaching, electrolytic circulation, manganese slag leachate reuse, wastewater treatment, and cooling circulation, achieving 100% closed-loop wastewater recycling. Leachate and lixiviant have pH values of 2.5–6, containing sulfate ions, manganese ions, ammonia nitrogen, weak acidic media, and fine manganese ore particles and manganese slag causing high-speed erosion; southeastern Guizhou experiences high-humidity acidic vapors during the rainy season; the 24-hour continuous electrolytic production line allows zero tolerance for downtime; frequent water hammer occurs in parallel pump operation. Conventional HT200 cast iron pump casings suffered wear-through and pitting corrosion within 3–4 months, acidic media leakage at the split joint, rusted and seized bolts during the rainy season, and excessive power consumption caused by rough flow passages.

 

Solution content: M&W ENERGY SAVING customized XS split-case pump casings in batches (1:1 interchangeable with original dimensions, requiring no modification to foundations or pipelines): clean-water cooling models XS400/450 use ZG20Mn alloy cast steel substrate + epoxy zinc-rich primer + polyurethane topcoat; leachate and lixiviant main-duty XS500/600 models use high-chromium manganese alloy substrate (Cr18% + Mn3.2%) + silicon carbide hexagonal mesh anchored lining (hardness far exceeding stainless steel, resistant to pH 2–12, service life ≥18 months); wastewater lifting XS350 models also use high-chromium manganese alloy + silicon carbide lining; fire-fighting clean-water XS300 models use standard anti-corrosion ZG20Mn. All units use 304 stainless steel tie bolts + fluororubber sealing grooves + PTFE gaskets, with precision-cast smooth flow passages, improving efficiency by more than 10%. The silicon carbide lining can be independently removed and replaced without replacing the entire casing.

 

Project Results: Pump casing service life increased from 3–4 months to over 18 months, reducing replacement frequency by 75% and spare parts costs by 68%; downtime for maintenance reduced by 70%, preventing electrolytic production shutdowns and completely eliminating environmental risks from acidic leakage. A benchmark project for customized pump casings in the manganese triangle electrolytic manganese industry, replicable in Xiushan, Huayuan, and manganese, zinc, and nickel hydrometallurgical circulating water systems in Guangxi and Hunan.

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