Isitebhisi sekhebula singesinye sezakhiwo ezisetshenziswa kakhulu ezimbonini nasezindaweni zomphakathi.Inezinzuzo zesisindo esilula, umthwalo omkhulu, ukubukeka okuhle, isakhiwo esilula nokufakwa okulula.Ifanele kokubili ukufakwa kwekhebula likagesi eliqinile lobubanzi obuncane kanye nokubekwa kwentambo kagesi ebuthakathaka.Kuphrojekthi, kunezindlela ezimbili zokubeka ithreyi ngekhava noma ngaphandle kwayo.Ithreyi elingenayo isembozo linokusebenza okuhle kokukhipha ukushisa, kodwa kulula ukuwa uthuli, futhi kunzima ukuyihlanza.Ivamise ukusetshenziswa ezindaweni ezingenalo uthuli noma ezindaweni ezinothuli, ngaphandle kwalokho kufanele kusetshenziswe ithreyi elinesembozo.Izimiso zokukhetha ithreyi zimi kanje:
A: Ithreyi ingasetshenziselwa ukuhlanganisa izintambo zikagesi ezivamile nezintambo zokuxhumana, kodwa ithreyi elingenamakhava alivunyelwe ukuthi libekwe ophahleni noma kusilingi esilengayo;B;750°C, ikhebula le-refractory elingu-1.5 h lingafakwa intambo ngethreyi emboziwe, (igobolondo lethreyi kufanele lenziwe ngezinto zokuvikela umlilo.)