Foshan Gaoming Jiye cold rolling circulating water pump energy-saving project | Foshan, Guangdong

Application scenario: Foshan Gaoming Jiye cold rolling plant (600,000 t/year), supporting 1450 pickling line, six-stand reversible cold rolling line, and bright annealing production line. Lingnan region has high temperature and humidity year-round, long rainy season, high groundwater hardness causing scaling, and acid pickling process with mild acid-alkali vapor corrosion. Before retrofit, S-type pumps had efficiency only 72%–76%, throttling losses accounted for over 24%, cast iron impellers wore through in 3–4 months, constant-speed operation without intelligent control, carbon steel shafts rusted and seized in high humidity, quarterly overhauls with maintenance costs exceeding 600,000 RMB/year.


Solution content: M&W ENERGY SAVING supplied four pump categories: XS150-605 clean circulating split case pump (500 m³/h / 80 m / ≥86%, 2 operating + 1 standby, variable frequency linked rolling line), LC long-shaft pickling turbid water pump (2507 duplex steel, anti-sediment flushing, overhaul extended to 12 months), DG multistage annealing soft water pump (55–75°C / 316L / PLAN23 mechanical seal), ISR auxiliary hot water pump. Wetted parts with graded acid-alkali and scaling resistance (304/316L/2507), epoxy zinc-rich + acid-alkali resistant coating, all 304 stainless fasteners, motor moisture-proof insulation + dual PT100 monitoring. CFD impeller improves efficiency by over 10 percentage points.


Project results: Comprehensive energy saving rate 22%–26%, annual electricity savings over 950,000 RMB; overhaul frequency reduced by 70%, maintenance cost saving over 500,000 RMB/year; intelligent stable pressure eliminates rolling mill overheating and annealing defects. Benchmark cold rolling pickling solution in Pearl River Delta, replicable to similar lines in Foshan, Zhongshan, and Dongguan.

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