As different processes of steel production design require a large amount of water, so there will be different types of pumps.For a medium-sized steel plant with an annual production of 500,000 tons, the total water capacity is 50 million tons.
Process of rolling water system
(1) Rolling mill clean cooling water process: the system is not mainly used for cooling of rolling mill motor device. The used water flows into the clean hot water pool and has been pressurized into cooling water pool and then to recycle.
(2) Rolling mill turbid circulating process:The system mainly supplies slag and rolling mill jet cooling. The used water flows into the cyclone well. The precipitated water is pressurized to the slag for recycling. The other part of the water is pressurized and sent to the chemical degreasing tank. The water flows into the turbid ring hot water pool, and is filtered and to the upper cooling tower. The cooled water enters the cold water pool, and is then to recycle. The sludge is partially pressurized and sent to the sludge concentration tank for treatment.
(3) The oily wastewater discharged from each unit site of the cold rolling workshop. The emulsion and oil wastewater generated by the pits and rolling mills of the pickling mill combined unit. The cleaning cycle of the continuous annealing unit and the oily wastewater generated by the pit. Degreasing cleaning section of hot-dip galvanizing unit, oily wastewater generated by pit. Degreasing cleaning of color coating coating unit and oily wastewater generated in process section. The emulsion and oil wastewater generated between the grinding rollers. Oil storage and emulsion wastewater treatment system for oil dewatering wastewater entering rolling mill.
The pump has been continuously in a large consumption and long term operation while in the handling of clean cooling water, turbid circulating water and tin pin water. Nowadays, energy conservation, consumption reduction and sustainable development are valued. It is very important to choose a safe, reliable and efficient pump product. At present, large double suction pump and regular single stage end suction pump have been the more used in steel mill. The multistage pump and slurry pump have been used as well.