How to deal with the industrial sewage produced by the steel rolling processing plant?
Release time:
2024-04-30
Steel rolling processing plants are divided into cold rolling wastewater and hot rolling wastewater. Steel rolling wastewater comes from the wastewater generated by the process of rolling ingots into various steel products such as steel bars, rails, steel plates and other products that require water to cool the rolls and flush the iron oxide scale. The main pollutants of this kind of wastewater include lubricating oil and iron oxide scale. How to deal with the industrial wastewater generated by steel rolling processing plants?
Steel rolling processing plants are divided into cold rolling wastewater and hot rolling wastewater. Steel rolling wastewater comes from the wastewater generated by the process of rolling ingots into various steel products such as steel bars, rails, steel plates and other products that require water to cool the rolls and flush the iron oxide scale. The main pollutants of this kind of wastewater include lubricating oil and iron oxide scale. How to deal with the industrial wastewater generated by steel rolling processing plants?
Steel rolling sewage, steel rolling processing plant wastewater, industrial sewage how to deal
Oil-bearing wastewater in steel rolling processing plant can recover part of the oil after treatment. The difficulty of wastewater treatment lies in solid impurities contained in the sewage, oil substances on mechanical equipment, iron oxide scale produced on the surface of material and steel, and roller table of spray cooling rolling mill. Dehydration and concentration of fine oil-bearing iron oxide scale are the main contents of the whole industrial wastewater treatment.
Steel rolling industrial wastewater can be treated by metal sewage treatment equipment, and its water treatment process is:
Industrial wastewater-grille-regulating tank-lifting pump house-contact flocculation sedimentation tank-clean water-water delivery pump house-dosing device-sludge concentration-dewatering treatment.
Because the steel rolling wastewater contains a large amount of suspended solids, it is necessary to carry out a water pretreatment between times, that is, grid treatment. After grid treatment, some iron oxide scale can be intercepted and recovered, and the grease-containing part of the wastewater can be crystallized and precipitated by adding lime.
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