Shandong Steel Laiwu 1# 3800 m³ blast furnace circulating water energy-saving pump project | Laiwu, Shandong

Application scenario: 3800 m³ blast furnace of Shandong Steel new and old kinetic energy conversion project (commissioned 2021), covering clean circulating water, slag flushing turbid water, hot blast furnace, and furnace-front systems. Medium includes softened clean water and high-temperature turbid water containing iron oxide; local winter temperature -15°C, dust and sediment heavy, 24-hour continuous operation. Original pumps had efficiency only 73%–77%, high throttling losses, cast iron impeller wear, quarterly overhauls, and no intelligent control, leading to high maintenance cost.


Solution content: Complete supply of multiple split case pump sets with CFD three-dimensional flow impellers improving efficiency by 10%; pump body ZG20Mn, 2507 duplex steel wear-resistant parts in turbid water sections, electric tracing motors for low-temperature operation, PLAN23 mechanical seals, G2.5 precision dynamic balancing. Entire system equipped with temperature, vibration, and pressure sensors, variable frequency system connected to plant energy management platform, providing 3-year on-site inspection service.


Project results: Comprehensive energy saving rate 23%–27%, annual electricity savings 1.45 million RMB; turbid water pump overhaul cycle extended to 1 year, maintenance cost reduced by 65%; intelligent early warning reduces blast furnace shutdown risk. Benchmark integrated blast furnace circulating water retrofit project for similar industry scale.

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