Kwallan yumbu (wanda kuma aka sani da ƙwallon goyan baya, ƙwallon inert da kafofin watsa labarai na tallafi) sun kasance muhimmin sashi a cikin tsarin haɓakawa a cikin matatar mai, sarrafa gas da masana'antar petrochemical.Babban aikinsa shine yin aiki azaman kayan tattarawa kuma a lokaci guda don tallafawa gadon mai kara kuzari don hana ci gaba ko asarar kayan haɓakawa ko kayan talla a ƙasan tasoshin reactor saboda matsanancin matsin lamba da zafin jiki a cikin tasoshin reactor yayin aiki. .Ƙwallon yumbu ya zo da ƴan girma dabam dabam, waɗanda sune 1/8 ", 1/4", 3/8", 1/2", 3/4", 1", 1¼", 1½", 2" .An tsara girman girman ta Layer a saman da kasa na jirgin ruwa, tare da nau'i daban-daban na ball yumbura.
High Alumina Ball 99% daidai yake Denstone 99 Media Support Media.Yana cikin sinadaran sinadaran99+% alpha alumina da matsakaicin 0.2wt% SiO2.Saboda babban abun ciki na alumina da ƙananan silica (SiO2), samfuri ne mai kyau sosai kuma mai dacewa don aikace-aikacen zafin jiki mai zafi da tururi, irin su masu gyara na biyu a cikin sarrafa ammonia, inda leached silica zai rufe kayan aiki na ƙasa ko lalata gadon mai kara kuzari.
99% High Alumina Ball yana da kyawawan kaddarorin thermal, tare da babban juriya mai yawan zafin jiki 1550 ℃, kuma yana da kyakkyawan zaɓi don riƙe zafi ko kafofin watsa labarai na daidaitawa.
Don mafi girman juriya na sinadarai, ya dace da aikace-aikace a cikin matakai na olefin, kamar busarwar ethylene, inda akwai matsalar polymerization.