How to treat industrial wastewater produced by mineral processing reagents
The effect of mineral processing reagents on the pollution of the ecological environment is very complicated.There are direct harms and indirect harms.Next,let's take a look at how to deal with the industrial wastewater produced by the beneficiation reagent.
The pollutants in the mineral processing wastewater mainly include suspended solids,acids and alkalis,heavy metals,mineral processing agents,chemical oxygen-consuming substances,etc.For the pollutants in wastewater,different treatment methods can be used.Suspended matter mainly adopts pre-sedimentation,coagulation/sedimentation method;acid-base wastewater adopts mutual neutralization method;heavy metal ions can adopt co-precipitation technology,adsorption technology,ion exchange method,etc.;chemical oxygen demand can adopt coagulation/sedimentation,Biodegradation,oxidation,adsorption,etc.
1.Precipitation by adding reagents:some beneficiation reagents are too fine to grind the particle size or the fine-grained tailings are suspended in the tailings water after adding certain beneficiation reagents.If they cannot be clarified for a long time,they need to be treated with chemical reagents.No.flocculant or lime.For example,mineral water contains water glass and oleic acid,and fine-grained tailings are suspended in the water and cannot be clarified for a long time.After adding lime,a better clarification effect is obtained.The dosage of lime is about 0.3%to 0.5%of the slurry amount.
2.Natural precipitation:The suspended solid waste water of the beneficiation reagent includes tailings,wet dust collection and surface water washing.The tailings water is generally settled in the tailings pond,and the wet dust collection and surface washing water are settled in a sedimentation tank or a concentration tank.The supernatant after solid-liquid separation is reused for production or when the water quality meets the discharge standards,it is directly discharged.The aerobic treatment wastewater is separated from liquid and solid by natural sedimentation in the sedimentation tank to obtain discharged wastewater and sludge.A small part of the sludge is returned to the contact oxidation tank,and most of the sludge is sent to the sludge thickening tank.
The above is an introduction on how to deal with the industrial waste water produced by the treatment of mineral processing chemicals.Do you understand?I hope I can bring you some help!