Raws li txoj hauv kev ua haujlwm, cov roj yas pov tseg - cov khoom siv kho kom zoo yog feem ntau categorized rau hauv hom txuas ntxiv thiab batch. Cov khoom siv txuas ntxiv yog tus cwj pwm los ntawm kev pub noj thiab tawm mus tas li, nrog rau tag nrho cov kab ntau lawm ua haujlwm tsis muaj kev cuam tshuam. Vim tias kev tsim khoom tsis tu ncua, tsis tas yuav tsum muaj kev kaw ntau zaus, qhib thiab kaw cov hlab ntsha, lossis cua txias thiab rov ua kom sov; yog li ntawd, cov tshuab no muaj peev xwm ua tau zoo, kev nyab xeeb, kev siv hluav taws xob, kev ua phooj ywg ib puag ncig, thiab lub neej ua haujlwm ntev. Nyob ntawm qib ntawm automation, lawv tuaj yeem raug cais raws li tsis siv neeg tag nrho lossis ib nrab- txuas ntxiv. Tsis siv neeg puv tshuab feature siab automation thiab yooj yim ntawm kev ua haujlwm. Nyob rau hauv cov nqe lus ntawm kev tsim qauv, kab rov tav configurations yog ntau.
Vessel-hom (los yog kettle-type) systems yog ib hom ntawm cov roj yas khib nyiab- cov khoom siv kho kom zoo, feem ntau yog lub tank loj rau hauv cov khoom pov tseg yas. Txoj kev no raug kev txom nyem los ntawm kev faib hluav taws xob tsis zoo thiab muaj kev pheej hmoo ntawm cov hlab ntsha hauv qab kub, ua rau muaj kev txhawj xeeb txog kev nyab xeeb; Txawm li cas los xij, cov cuab yeej siv tau yooj yim, pheej yig, thiab yooj yim rau kev khiav lag luam. Ob lub nkoj ntsug thiab kab rov tav poob rau hauv pawg no.
Rotary furnaces kuj tseem siv tau, suav nrog cov qauv ntsuas hluav taws xob thiab cov tshuab hluav taws xob teb. Thaum lub tshuab hluav taws xob teb muaj cov khoom siv hluav taws xob zoo tshaj plaws, lawv muaj peev xwm thauj khoom tsawg thiab qis dua cov khoom tsim tawm.