Layin Rubber na Alumina mai jure lalacewa: Mafita Mai Inganci don Kariyar Yaduwa a Masana'antu

Therufin roba na yumbu mai jure lalacewawani abu ne mai haɗaka da ake amfani da shi sosai a fannin kariyar lalacewa ta masana'antu. Yana tsawaita rayuwar kayan aiki cikin mawuyacin hali ta hanyar haɗa juriyar lalacewa mai yawa na yumbu alumina tare da halayen ƙusoshin roba. Wannan layin yana amfani da alumina a matsayin babban kayan da aka ƙera, tare da ƙara foda na yumbu da silicon oxide, wanda aka niƙa a yanayin zafi mai zafi kusan 1700°C. Yawan alumina ɗinsa gabaɗaya bai gaza kashi 95% ba, yawansa ya kai 3.5-3.9 g/cm³, kuma taurin Rockwell yana da girma kamar HRA85-90, wanda ke tabbatar da kyakkyawan juriyar lalacewa. A aikace-aikace na aiki, wannan layin yana nuna tsarin haɗaka mai matakai da yawa: saman layin shine yumbu alumina, tsakiyar shine layin roba, kuma ƙasan farantin ƙarfe ne mai tallafi. Waɗannan layuka uku suna da ƙarfi ta hanyar tsarin vulcanization, suna samar da tsarin kariya ta lalacewa mai haɗin kai.

Kyakkyawan aikin wannan layin haɗin gwiwa yana bayyana ta fannoni da yawa: Na farko, juriyar sawa tana da kyau, tare da taurin yumbu na alumina corundum wanda ya kai sama da HRA85, kuma juriyar sawa ya fi sau 200 fiye da na ƙarfen carbon na yau da kullun. Na biyu, samfurin yana da kyakkyawan juriyar tasiri. Ta hanyar dabarar yumbu mai tauri da ƙirar zagaye ta musamman, tare da layin buffer na roba, yana iya tsayayya da tasirin manyan kayayyaki yadda ya kamata. Na uku, layin yana da kyakkyawan juriyar zafi kuma yana iya aiki cikin kwanciyar hankali a cikin kewayon zafin jiki na 0°C zuwa 250°C na tsawon lokaci. Bugu da ƙari, layin roba yana amfani da dabara ta musamman tare da juriyar acid da alkali, wanda zai iya jure tsatsa a cikin yanayin acid mai rauni da alkaline mai rauni. Dangane da halayen jiki, ƙarfin matsi na layin shine ≥850 MPa, ƙarfin karyewar KΙC ≥4.8 MPa·m1/2, ƙarfin haɗin gwiwa tsakanin roba da yumbu (ƙarfin yankewa) ≥3.0 MPa, kuma tsawon tsufan roba shine ≥ shekaru 15, wanda ke tabbatar da amincin samfurin na dogon lokaci.

Ana amfani da layukan roba na yumbu na alumina masu jure lalacewa sosai a fannonin masana'antu, galibi sun haɗa da tsarin jigilar kwal mai amfani da wutar lantarki, hoppers na masana'antar ƙarfe, magudanar ma'adinai, kayan aikin wanke kwal, tsarin jigilar siminti, da sauran wurare masu lalacewa sosai. A aikace, layukan galibi ana raba su zuwa nau'ikan daban-daban kamar haɗin gwiwa, walda, da haɗin roba, gami da ƙayyadaddun bayanai daban-daban kamar madaidaicin murabba'i mai ƙarfi, tare da ramuka masu zagaye, da bututun trapezoidal. Ana iya yanke su kuma a lanƙwasa su bisa ga siffar kayan aikin, suna biyan buƙatun shigarwa na kayan aiki na musamman. Tsarin zamani yana sauƙaƙa shigarwa da maye gurbin su cikin sauƙi, yana rage lokacin gyara kayan aiki da farashi sosai. A cikin aikin haƙar ma'adinai mai wayo da sarrafa fasaha na Dundee Mining mai nauyin tan miliyan 4.5, kwandon niƙa ya ɗauki manyan layukan yumbu tare da K95 mai kyau abun ciki na alumina ≥95% da yawa ≥3.8 g/cm³, yana nuna amincinsa a cikin manyan ayyukan masana'antu.