Rufin Ceramic na Alumina mai jure lalacewa don Kayan Aikin Shuka na Siminti

A fannin samar da siminti, kayan aiki kamar bututun jigilar kaya, gidajen rabawa, guguwa, da magudanar ruwa suna jure wa tasirin sauri mai tsawo da lalacewa mai zamiya, wanda ke haifar da asarar ƙarfe cikin sauri da kuma ƙara farashin kulawa na ɗan lokaci. Amfani da rufin yumbu na alumina mai jure lalacewa yana ƙara tsawon rayuwar sabis sosai. Ana samar da wannan rufin ta hanyar yin siminti mai zafi, tare da abun ciki na alumina wanda bai gaza kashi 92% ba, yawan alumina ≥3.60 g/cm³, taurin Rockwell (HRA) sama da 85, da kuma girman lalacewa ƙasa da 0.1 cm³ (an gwada bisa ga GB/T 8489-2006).

Idan aka kwatanta da faranti na ƙarfe masu jure lalacewa na gargajiya (misali, NM400), rufin yumbu na alumina yana nuna juriyar lalacewa sau 5-8, tare da ƙarancin ma'aunin gogayya a saman (kimanin 0.2-0.3 a lokacin bushewa), yana rage haɗarin mannewa da toshewar abu. Ana manne tayal ɗin yumbu a bangon ciki na kayan aiki ta amfani da resin epoxy ko manne mara tsari, tare da kewayon zafin aiki na -50°C zuwa 300°C da juriya na ɗan gajeren lokaci har zuwa 500°C. A ƙarƙashin yanayin masana'antar siminti na yau da kullun, rufin yumbu yana tsawaita rayuwar sabis na magudanar ruwa daga watanni 6 zuwa sama da watanni 36.

An yi nasarar amfani da wannan rufin a kan muhimman abubuwa kamar bututun ciyar da injin niƙa, bututun jagora na rabawa, mazubin guguwa, da bututun ɗaukar clinker a cikin masana'antar siminti. Bayanan filin sun nuna cewa a ƙarƙashin matsakaicin girman barbashi na abu na 30 mm da saurin layi na 15 m/s, bayan watanni 12 na ci gaba da aiki, zurfin lalacewa akan saman tayal ɗin yumbu shine 0.2-0.5 mm kawai, kuma ana tsawaita tazara tsakanin kula da kayan aiki zuwa sau huɗu na tsawon asali. Ana samunsa a cikin faranti na yumbu na zamani ko facin tayal ɗin mosaic, rufin yana daidaitawa da kayan aiki masu lanƙwasa da siffofi daban-daban.

Tallarufin yumbu na alumina mai jure lalacewa a cikin kayan aikin injiniyan simintiyana rage yawan amfani da kayan gyara da asarar lokacin aiki, yana inganta yawan aiki na layukan samarwa. A lokacin shigarwa, tabbatar da cewa saman substrate ɗin yana da tsabta kuma babu mai; lokacin mannewa yakamata ya zama aƙalla awanni 24 (a 25°C). Don kusurwoyin tasiri sama da 45° a wuraren faɗuwar kayan, ana ba da shawarar yin amfani da ma'aunin buffer don ƙara inganta juriyar tasiri. An haɗa wannan fasaha cikin ƙa'idodi da yawa na ƙira na kariyar lalacewa a cikin masana'antar siminti.