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1、畢業(yè)論文論文題目:AOD渣動(dòng)態(tài)淋溶特性研究摘要AOD渣屮含冇Cr等冇毒元素,自然條件下具冇一定的淋溶毒性,其綜合處置及其淋溶毒性越來(lái)越受到廣泛關(guān)注。木論文以AOD渣為研究對(duì)象,采用動(dòng)態(tài)淋溶實(shí)驗(yàn),研究了固液比和淋溶液初始pH值對(duì)Ci?溶岀特性的影響規(guī)律。研究結(jié)果表明,由于AOD渣含大量堿性氧化物,不同淋溶條件下,淋溶液初始pH值基本保持在10?11,只有當(dāng)淋溶液初始pH值為2時(shí),淋溶初期的pH相對(duì)較小;AOD渣存有FeO等還原性物質(zhì),整個(gè)動(dòng)態(tài)淋溶實(shí)驗(yàn)過程中,淋溶液氧化還原電位較低,淋溶液呈現(xiàn)還原性;不同固液比和不同初始pH條件下,淋
2、溶液溶解氧基本維持在7.0?9.0mg/L;淋溶初期,固液比對(duì)淋溶液銘的溶出有一定的影響,但隨著淋溶時(shí)間延長(zhǎng),銘溶出濃度和銘的累積量趨于穩(wěn)定。本研究探索了動(dòng)態(tài)淋溶過程屮AOD渣的淋溶特性,為不銹鋼渣生態(tài)風(fēng)險(xiǎn)評(píng)價(jià)奠定實(shí)驗(yàn)基礎(chǔ),具有重要的現(xiàn)實(shí)意義和理論價(jià)值。關(guān)鍵詞AOD渣;動(dòng)態(tài)淋溶;總鉆;累積量AbstractThispaperbyAODslagastheresearchobject,byusingdynamicleachingexperiment,solid-liquidratioandleachingsolutionwasstud
3、iedtheinfluenceofinitialpHonCrdissolutioncharacteristics,getthefollowingconclusion:becauseoftheAODslagcontainingalargeamountofalkalineoxide,differentleachingconditions,theleachingsolutionofinitialpHbasickeepin10?11,onlywhentheinitialleachingsolutionpHvalueis2,leaching
4、initialpHisrelativelysmall;AODcontainsthereducingagents,suchasFeOslagintheprocessofthewholedynamicleachingexperiment,REDOXpotentialleachingsolutionislow,reducingleachingsolutionpresented;Undertheconditionofdifferentsolid-liquidrateanddifferentinitialpH,dissolvedoxygen
5、leachingsolutionmaintainedat7.0?9.0mg/L;Earlyleaching,solid-liquidratioontheleachingsolutionofchromiumstrippinghascertaininfluence,butastheleachingtimeprolonged,theaccumulationofchromiumandchromiumstrippingconcentrationtendstobestable.ThisstudyexplorestheAODslaginthep
6、rocessofdynamicleachingleachingcharacteristicsoftheecologicalriskassessmentforthestainlesssteelslagexperimentalbasis,haveimportantpracticalsignificanceandtheoreticalvalue?Keywords:AODslag;Dynamicleaching;Totalchromium;accumulationamount摘要IAbstractII第]章緒論-1-1.1不銹鋼渣概述-1
7、-12不銹鋼渣的化學(xué)成分-2-1.3不銹鋼渣的物化性質(zhì)-2-1.4不銹鋼渣的處理方法-3-1.5本課題的來(lái)源-5-1.6研究意義及研究?jī)?nèi)容-5-第2章AOD渣動(dòng)態(tài)淋溶研究方法-6-2.1實(shí)驗(yàn)內(nèi)容?6?2.1.1實(shí)驗(yàn)材料-6-2.1.2實(shí)驗(yàn)試劑-6-2.1.3實(shí)驗(yàn)設(shè)備-7-2.2動(dòng)態(tài)實(shí)驗(yàn)方法及步驟-7-2.3Cr濃度的測(cè)定方法-8-2.3.1實(shí)驗(yàn)試劑的配制-8-2.3.2Ci?濃度測(cè)定■—2.3.3標(biāo)準(zhǔn)Illi線的繪制-9-2.4木章小節(jié)-10-第3章動(dòng)態(tài)淋溶實(shí)驗(yàn)結(jié)果及分析-11-3」固液比對(duì)Cr淋溶濃度的影響-11-3.1.1固液
8、比對(duì)淋溶液pH值的影響-11-3.1.2固液比對(duì)電位的影響-11-3.1.3固液比對(duì)溶解氧的影響-12-3.1.4固液比不同対總銘濃度的影響?12?3.2淋溶液初始pH對(duì)Cr淋溶濃度的影響-13-3.2.1固液比為30:1000時(shí),初始pH值對(duì)淋溶