Thaum lub sij hawm smelting ntawm ferrosilicon, vim yog - tej yam kev mob nyuaj nyob rau hauv lub cub tawg, xws li qhov chaw ntiav ntiav ntawm cov electrodes los yog cov duab tsis zoo ntawm lub crucible (hearth), qhov saum npoo ntawm tus nqi yuav ua tsis zoo permeable rau gases. Qhov no ua rau muaj qhov tshwm sim ntawm "kev nkag mus rau hluav taws", qhov twg cov roj hluav taws xob kub hnyiab saum tus nqi ntau dua li tsis dhau los ntawm nws.
Yuav kom daws tau qhov teeb meem no, tus neeg teb xov tooj ua cov tho qhov ntawm lub qhov. Siv puag ncig steel rods (crowbars), impenetrable cheeb tsam ntawm tus nqi nto yog tawg los ntawm. Nyob rau hauv rooj plaub no, tus nqi tsis nce, tab sis tsuas yog loosened los xyuas kom meej qhov tso tawm ntawm lub cub tawg. Qhov kev ua haujlwm no feem ntau siv hauv ferrosilicon smelting los txhim kho cov pa permeability.
Qhov chaw rau drilling qhov
Lub qhov yog stitched nyob rau hauv cov chaw hauv qab no:
Nyob rau hauv qis qis ntawm tus nqi cone los yog nyob rau thaj tsam loj ntawm tus nqi nto nrog cov pa roj permeability tsis zoo.
Nyob ib ncig ntawm thaj chaw refractory (ze rau hauv ob sab phlu).
Lub hom phiaj ntawm qhov piercing
Tsim qhov tso cai rau koj ua tiav cov hom phiaj hauv qab no:
Acceleration ntawm kev tshem tawm roj.Kev tso tawm sai sai ntawm cov pa roj carbon monoxide ntau (CO) tsim los ntawm cov tshuaj tiv thaiv tau ua kom ntseeg tau. Qhov no ua rau kom lub preheating nto ntawm tus nqi, tsub kom cov pa permeability ntawm qhov chaw, nthuav lub crucible thiab pab ceev cov tshuaj tiv thaiv nyob rau hauv lub cub tawg.
Txo kub poob.Qhov tshwm sim ntawm "kev nkag mus rau hluav taws" yog txo, uas ua rau txo qis hauv kev kub ntxhov.
Cov yam ntxwv ntawm kev ua haujlwm
Round steel crowbars yog siv rau tho. Lub zog yuav tsum tau ua tib zoo loosening tus nqi, thiab tsis txhob nqa nws.
Lub qhov yog stitched thaum gas permeability deteriorates los yog "hluav taws xob nkag" tshwm sim. Qhov kev ua haujlwm no yuav tsum tau ua ke nrog kev kho cua sov tsis tu ncua (mandrel) thiab tswj kev thauj khoom ntawm tus nqi.
Kev tuav ruaj khov rau qhov tob ntawm cov electrodes thiab cov duab zoo ntawm lub crucible txo qhov xav tau rau cov tho qhov ntawm qhov.