加蓋球化處理工藝的研究.pdf

1、鄭碩士學位授予單位代碼!Q塹!學號或申請?zhí)朡2蝤Z2密級——學論文論文題目：加蓋球化處理工藝的研究作者姓名：王成鐸學科門類：工學專業(yè)名稱：材料加工工程導師姓名、職稱：郭振廷副教授2005年5月20日摘要ABSTRACTPour—overprocessisusedwidelyintheproductionofductileironinourcountrybecauseitssimpleequipmentisoperatedconvenie

2、ntlyButthisprocessstillhassomeshortcomings，absorptivityofmagnesium(Mg)islowandwastageofspheroidizerisalot，spheroidizedeffectisinstable，andthequantityofMglightandsootismuch，whichpollutesenvironmentseriouslySopeopleappenda

3、ladlecoverwithachannelbasinontheladle、vithadykefornodulizingprocess，wecallittundish—covernodulizingprocessTheseclusionofladlecovermakesnodulizingprocessinthecomparativelyanoxicatmospherewithsomepressure，thustheshortcomin

4、gsofpouroverprocessCanbeovercomedgreatlyOfcourse，thetundishcovernodulizingprocessalsobringsomenewproblems：reiterativeloadingandunloadingofladlecovermakeoperationdifficultandironliquidquantityisdifficulttocontrolwhentaped

5、ironliquidiscontinuousPeoplehavebeenworkinghardtosolvetheseproblemsForsolvingtheproblemsexistinginthetundishcovernodulizingprocess，wehavedesignedtheanewladlecove，whichcallliftanddropfreelyandmakeworkeroperateconveniently

6、Besidesweuseheat—resistantelectronicbalance，whichCansolvetherationproblemofironliquidvalidlyOnthebaseofthis，byselectingrationalchemicalcomponent，adoptingcupolaandelectriccookerpairsmeltingcraftandcarryingondesulphurizati

7、on，wecanobtainlowsulphur(S)liquidironwithsteadytemperatureandcomponent，andthengoalongnodulizingtreatmentwithpouroverprocessandtundishcoverprocessrespectivelyTheresultsshowthattnndishcovernodulizingprocessCanreduceoxidati

8、onandburningofMg，stabilizeandimprovetheabsorptivityofMg，reducetheusedamountofspheroidizerlowertheSandrareearth(RE)contentoftreatedironliquid，whichguaranteethattheREcontentislowerthantheMgamountinthetreatedironliquid，stab