Zaɓin ɗanyen abu
Ya kamata ɗanɗano kayan ɗanɗano ya inganta tare da dandanotagullairi.Lokacin da aka narkar da tagulla mara mahimmanci, idan ingancin cajin yana da aminci, wani lokacin amfani da tsohon abu zai iya kaiwa 100%.Koyaya, don tabbatar da ingancin narkewar da rage hasara mai ƙonewa, yin amfani da cajin da aka raba dalla-dalla kamar nau'in sawdust daban-daban ko kwakwalwan zinc bai kamata ya wuce 30%.Fuskar gwaji: Lokacin amfani da 50% cathode jan karfe da 50% tagulla tsohon abu, lokacin da ake buƙata na narkewa shine mafi tsayi kuma yawan kuzari shine mafi girma.Idan an riga an sanya sinadarin zinc a zafin jiki zuwa 100 ~ 150 ℃ kuma ana ciyar da shi cikin batches, yana da matukar fa'ida a gare shi ya nutse ya narke a cikin ruwan narkakkar da sauri, wanda zai iya rage asarar ƙarfe.Ƙara ƙaramin adadin phosphorus zai iya samar da fim ɗin oxide mafi na roba wanda ya ƙunshi 2ZnO.p2o2 akan saman narkakken tafkin.Ƙara ƙaramin adadin aluminum, kamar 0.1% ~ 0.2%, zai iya samar da wani fim mai kariya na Al2O3 a saman tafkin da aka narkar da shi, kuma yana taimakawa wajen kaucewa da rage rashin daidaituwa na zinc da inganta yanayin simintin.Lokacin da aka yi amfani da tsofaffin kayan da aka yi amfani da su don narke tagulla, ya kamata a yi ramawa da ya dace don wasu abubuwa tare da babban hasara na narkewa.Alal misali, adadin kuɗin da aka riga aka biya na zinc shine 0.2% lokacin da aka narkar da ƙananan zinc tagulla, adadin pre-diyya na zinc shine 0.4% -0.7% lokacin da aka narke matsakaici-zinc tagulla, kuma adadin pre-diyya na zinc shine 1.2% -2.0% lokacin da aka yi girma-zinc brasmel.
sarrafa tsarin narkewa
Babban tsari na ƙari lokacin da ake narkewar tagulla shine: jan karfe, tsohon abu da zinc.Lokacin da ake narkewa da tagulla daga sinadarai na ƙarfe mai tsabta, jan ƙarfe ya kamata a narke da farko.Gabaɗaya, lokacin da jan ƙarfe ya narke kuma ya yi zafi zuwa wani yanayi, yakamata a cire shi da kyau (misali tare da phosphorus) sannan a narkar da zinc.Lokacin da cajin ya ƙunshi tsohuwar cajin tagulla, ana iya daidaita jerin caji daidai gwargwadon yanayin ainihin yanayin kamar halayen abubuwan haɗin gwal da nau'in tanderun narkewa.Domin shi kansa tsohon kayan yana dauke da sinadarin zinc, domin rage narkewar sinadarin zinc, ya kamata a rika kara tsohon kayan tagulla a narke a karshe.Koyaya, manyan cajin ba su dace da cajin ƙarshe da narkewa ba.Idan cajin ya jike, bai kamata a ƙara shi kai tsaye zuwa narke ba.Idan aka kara cajin rigar a kan sauran cajin da ba a narkar da shi ba, zai haifar da lokacin bushewa da zafi kafin ya narke, wanda ba kawai yana da fa'ida don guje wa narkewar numfashi ba, har ma don guje wa wasu hadurruka.Ƙarin Zinc a ƙananan zafin jiki shine ƙa'idar asali wanda dole ne a bi shi a kusan dukkanin matakai na narkewar tagulla.Ƙara zinc a ƙananan zafin jiki ba kawai zai iya rage ƙona asarar zinc ba, amma kuma yana taimakawa amincin aikin narkewa.Lokacin da ake narkewar tagulla a cikin tanderun shigar da ƙarfe mai ƙarfi, gabaɗaya ba dole ba ne a ƙara deoxidizer saboda narka kanta, wato, tafkin narkar da ruwa, ya ƙunshi adadi mai yawa na zinc.Duk da haka, lokacin da ingancin narkewa ba shi da kyau, 0.001% ~ 0.01% phosphorus kuma za'a iya ƙarawa bisa ga jimlar nauyin cajin don deoxidation na karin.Ƙara ƙaramin ƙarfe na ƙarfe-phosphorus master alloy zuwa narke zai iya ƙara yawan ruwa na narkewa kafin a sake shi daga tanderun.Ɗaukar H65 tagulla a matsayin misali, wurin narkewar sa shine 936°C.Domin yin iskar gas da mujallu a cikin narkewar ruwa da fitarwa a cikin lokaci, ba tare da haifar da haɓakar zinc da yawa ba da inhalation na narkewa, ana sarrafa zafin narkewa gaba ɗaya a 1060 ~ 1100 ° C.Za a iya ƙara yawan zafin jiki da kyau zuwa 1080 ~ 1120 ℃.Bayan "wuta tofa" sau 2 zuwa 3, ana jefa shi a cikin mai juyawa.Rufe da gasasshen gawayi yayin aikin narkewa, kuma kauri daga cikin rufin ya kamata ya fi 80mm girma.
Lokacin aikawa: Jul-07-2022