Akwai babban bambanci tsakanin tubalin yumbu da manyan tubalin alumina, amma ina ne bambancin?

Tubalin yumbu suna da abun ciki na aluminum na 35% -45%. An yi shi da yumbu mai kauri, gauraye da buƙatun girman ɓangarorin, an kafa shi kuma bushe, kuma ana harba shi a zafin jiki na 1300-1400 ° C. Tsarin harbe-harbe na tubalin yumbu shine tsarin ci gaba da bushewa da bazuwar kaolin don samar da lu’ulu’u na mullite. Tubalin yumbu sune samfuran refractory mai rauni, wanda zai iya tsayayya da yashwar acid slag da iskar acid. Tubalin yumbu suna da kyawawan kaddarorin thermal kuma suna da juriya ga saurin sanyi da saurin zafi.

Clay tubali

A cikin kewayon zafin jiki na 0-1000 ℃, ƙarar tubalin yumbu zai faɗaɗa daidai da haɓakar zafin jiki. Madaidaicin shimfidar layin yana kusan zuwa madaidaiciyar layi, kuma ƙimar faɗaɗa madaidaiciya shine 0.6% -0.7%. Lokacin da zafin jiki ya kai 1200 ℃, Lokacin da zafin jiki ya ci gaba da tashi, ƙarar sa zai fara raguwa daga matsakaicin fadadawa. Bayan da zafin jiki na yumbu bulo ya wuce 1200 ℃, da low narkewa batu a cikin lãka bulo a hankali narkewa, da kuma barbashi suna tam guga man da juna saboda surface tashin hankali, sakamakon girma shrinkage.

High-alumina refractory tubalin samfuran refractory ne tare da abun ciki na aluminum fiye da 48%. A refractoriness da nauyi taushi zafin jiki na high-alumina tubalin sun fi na lãka tubalin, da slag lalata juriya ne mafi alhẽri, amma su thermal kwanciyar hankali ba shi da kyau kamar na yumbu tubalan. Babban tubalin alumina suna da babban yawa, ƙarancin porosity da juriya. Ga wasu shugabannin tanderun da tanderun wuta, yana da kyau a yi amfani da bulo na alumina don masonry; duk da haka, idan yana da takamaiman bulo na yumbu don murhun carbon, bai dace a yi amfani da tubalin alumina masu tsayi ba, saboda manyan bulogin alumina suna da saurin juyewa a yanayin zafi. Ƙunƙarar kusurwa.

Babban tubalin alumina

Ana amfani da manyan bulogin alumina don rufin murhun wuta, murhu mai zafi, rufin tanderun wutar lantarki, tanda mai fashewa, tanderu mai jujjuyawa, da rotary kilns. Bugu da kari, manyan tubalin alumina ana amfani da ko’ina azaman bulogin mai sabunta murhu, matosai don tsarin zubar da ruwa, bulogin bututun ƙarfe, da sauransu. Duk da haka, farashin manyan bulogin alumina ya fi na tubalin yumbu, don haka ya kamata a yi amfani da tubalin yumbu inda tubalin yumbu mai yuwuwa zai iya cika buƙatun. .