Kev xaiv raw khoom
Cov khoom siv raw saj yuav tsum txhim kho nrog saj ntawmtooj dagntau yam.Thaum smelting tsis tseem ceeb tooj dag, yog tias qhov zoo ntawm tus nqi yog txhim khu kev qha, qee zaum siv cov khoom qub tuaj yeem ncav cuag 100%.Txawm li cas los xij, txhawm rau kom ntseeg tau tias qhov zoo ntawm cov yaj thiab txo qhov hlawv, kev siv cov nqi sib faib zoo xws li ntau yam sawdust lossis zinc chips feem ntau yuav tsum tsis pub tshaj 30%.Kev sim nto: Thaum siv 50% cathode tooj liab thiab 50% tooj dag cov khoom qub, lub sij hawm smelting yuav tsum tau ntev tshaj plaws thiab lub zog noj yog siab tshaj.Yog hais tias zinc ingot yog preheated rau 100 ~ 150 ℃ thiab pub rau hauv batch, nws yog ib qho zoo heev rau nws mus rau hauv dab dej thiab yaj nyob rau hauv lub molten pas dej ua ke sai sai, uas yuav txo tau qhov kub ntawm cov hlau.Ntxiv ib qho me me ntawm phosphorus tuaj yeem tsim cov oxide zaj duab xis ntau dua li ntawm 2ZnO.p2o2 ntawm lub pas dej molten.Ntxiv ib qho me me ntawm txhuas, xws li 0.1% ~ 0.2%, tuaj yeem tsim ib qho Al2O3 tiv thaiv zaj duab xis rau saum npoo ntawm lub pas dej molten, thiab pab kom tsis txhob thiab txo cov volatilization ntawm zinc thiab txhim kho cov txheej txheem casting.Thaum siv cov khoom qub qub los smelting tooj dag, tsim nyog pre-compensation yuav tsum tau ua rau ib co ntsiab uas kuj loj smelting poob.Piv txwv li, cov nyiaj them ua ntej zinc yog 0.2% thaum smelting low-zinc tooj dag, qhov nyiaj them ua ntej zinc yog 0.4%-0.7% thaum nruab nrab-zinc tooj dag yog smelted, thiab pre-compensation tus nqi ntawm zinc yog 1.2% -2.0% thaum high-zinc brass yog smelted.
Melting txheej txheem tswj
Kev txiav txim dav dav ntawm kev ntxiv thaum smelting tooj dag yog: tooj liab, cov khoom qub thiab zinc.Thaum smelting tooj dag los ntawm cov khoom xyaw hlau ntshiab, cov tooj liab yuav tsum tau yaj ua ntej.Feem ntau, thaum tooj liab melted thiab overheated rau ib tug tej yam kub, nws yuav tsum tau deoxidized kom zoo (xws li nrog phosphorus) thiab ces cov zinc yuav tsum tau melted.Thaum cov nqi them muaj cov nqi tooj liab qub, cov nqi them nqi tuaj yeem hloov kho kom tsim nyog raws li cov xwm txheej tiag tiag xws li cov yam ntxwv ntawm cov khoom siv hlau thiab hom ntawm lub qhov cub smelting.Vim hais tias cov khoom qub nws tus kheej muaj zinc, thiaj li yuav txo tau cov melting poob ntawm zinc, cov khoom qub tooj liab feem ntau yuav tsum tau ntxiv thiab melted thaum kawg.Txawm li cas los xij, cov khoom loj loj tsis haum rau kev them nyiaj zaum kawg thiab melting.Yog hais tias tus nqi yog ntub, nws yuav tsum tsis txhob ntxiv ncaj qha rau lub yaj.Yog tias tus nqi ntub dej ntxiv rau sab saum toj ntawm lwm yam tsis muaj nqi, nws yuav tsim kom qhuav thiab preheating lub sij hawm ua ntej nws yuav yaj, uas tsis yog tsuas yog pab kom tsis txhob yaj inhalation, tab sis kuj kom tsis txhob muaj lwm yam xwm txheej.Zinc ntxiv ntawm qhov kub qis yog lub hauv paus ntsiab lus uas yuav tsum tau ua raws li yuav luag tag nrho cov txheej txheem tooj dag smelting.Ntxiv zinc ntawm qhov kub thiab txias tsis tuaj yeem tsuas yog txo qhov kub ntawm zinc, tab sis kuj pab kev nyab xeeb ntawm kev ua haujlwm smelting.Thaum smelting tooj dag nyob rau hauv lub hwj chim-zaus hlau-core induction rauv, nws yog feem ntau tsis tsim nyog ntxiv ib tug deoxidizer vim hais tias lub yaj nws tus kheej, uas yog, lub transitional molten pas dej ua ke, muaj ib tug loj npaum li cas ntawm zinc.Txawm li cas los xij, thaum cov yaj zoo tsis zoo, 0.001% ~ 0.01% phosphorus tuaj yeem ntxiv raws li qhov hnyav tag nrho ntawm tus nqi rau kev pabcuam deoxidation.Ntxiv ib qho me me ntawm tooj liab-phosphorus master alloy rau cov yaj tuaj yeem ua kom cov dej ntws ntawm cov yaj ua ntej nws tawm ntawm qhov cub.Siv H65 tooj dag ua piv txwv, nws cov ntsiab lus melting yog 936 ° C.Txhawm rau ua kom cov pa roj thiab cov ntawv xov xwm hauv cov yaj ntab thiab tawm hauv lub sijhawm, tsis tas yuav ua rau muaj kev kub ntxhov ntau ntawm zinc thiab nqus dej ntawm cov yaj, feem ntau ntawm cov melting kub yog tswj ntawm 1060 ~ 1100 ° C.Qhov kub tuaj yeem tsim nyog nce mus rau 1080 ~ 1120 ℃.Tom qab "tawm hluav taws" 2 mus rau 3 zaug, nws raug pov rau hauv lub converter.Npog nrog ci charcoal thaum lub sij hawm smelting txheej txheem, thiab lub thickness ntawm txheej yuav tsum ntau tshaj 80 hli.
Lub sij hawm xa tuaj: Plaub Hlis-07-2022