宝钢技术2023年第3期基于冷轧废水零排放的预处理工艺优化研究靳创杰(宝钢湛江钢铁有限公司能源环保部，广东湛江524001)摘要:冷轧废水是钢铁企业产生的一种特殊废水，因酸洗废水处理中采取投加石灰作为中和措施，导致冷轧废水钙硬度高，在废水零排放实践中需采取化学软化、离子交换工序降低废水中钙硬度以满足工艺需求。通过优化处理工艺、周期性更换挤干辊实现源头废水减量;制定酸再生异常排放处置方案，稳定、有效地将冷轧废水出水钙硬度由1200mg/L降低至400mg/L以下;取消深度处理前预处理工艺，简化了处理工艺的同时提升出水水质，保障了系统的稳定运行，降低了系统运行成本。关键词:冷轧废水;零排放;钙硬度;预处理工艺中图分类号:X703文献标志码:B文章编号:1008－0716(2023)03－0076－03doi:10．3969/j．issn．1008－0716．2023．03．015ＲesearchonoptimizationofpretreatmentprocessforzerodischargeofcoldrollingwastewaterJINChuangjie(Energy＆EnvironmentDepartment，BaosteelZhanjiangIron＆SteelCo．，Ltd．，Zhanjiang524001，Guangdong，China)Abstract:Coldrollingwastewaterisspecialwastewaterproducedbyironandsteelenterprises，becausethepicklingwastewatertreatmenttakeslimeasneutralizationmeasures，resultingincoldrollingwastewaterusuallywithhighcalciumhardnesscontent．Thepracticeofzerowastewaterdischargeneedstotakechemicalsofteningandionexchangeprocessestoreducethecalciumhardnessinwastewatertomeettheprocessdemand，throughtheoptimizationofthetreatmentprocessandtheperiodicreplacementofthesqueezerolltoachievethereductionofsourcewastewater．Thenthedevelopmentofanacidregenerationabnormaldischargedisposalplanreducesthecalciumhardnessofcoldrollingwastewatereffluentfrom1200mg/Ltolessthan400mg/Leffectively．Bycancelingthepretreatmentprocessadvancedtreatment，thetreatmentprocessissimplified，theeffluentqualityisimproved，thestableoperationofthesystemisguaranteed，andtheoperationcostofthesystemisreduced．Keywords:coldrollingwastewater;zerodischarge;calciumhardness;pretreatmentprocess靳创杰助理工程师1991年生2014年毕业于广东工业大学现从事水处理技术工作电话13729093105E-mail683105@baosteel．com冷轧废水主要来源于冷轧机组产生的乳化液、平整液、稀油...
