Kev xaiv cov ntaub ntawv rau hlau lub qhov ncauj composite bricks
Tam sim no, composite xim av corundum bricks los yogcorundum-mullite refractory cibfeem ntau yog siv nyob rau hauv kev tsim ntawm hlau qhov ncauj composite bricks. Lub peev xwm ntawm ob cov ntaub ntawv no los tiv thaiv kev yaig los ntawm cov hlau molten tsis zoo tagnrho, thiab qhov tob ntawm lub qhov ncauj hlau tsis ruaj khov hauv kev tsim khoom. Raws li kev xyaum tsim khoom ntawm Anshan Hlau thiab Hlau 2580m3 thiab 1000m3 blast furnaces, thaum aluminium-carbon-silicon carbide composite cib siv rau lub qhov ncauj hlau, lub qhov ncauj qhov tob yog qhov ruaj khov thiab yooj yim los tswj. Yog li ntawd, nws yog qhov tsim nyog los xaiv aluminium-carbon composite bricks.
Kev xaiv cov ntaub ntawv rau tuyere composite bricks
Tam sim no, cov pob zeb sib xyaw xim av corundum lossis corundum-mullite cib feem ntau yog siv rau hauv kev tsim ntawm tuyere composite cib. Txij li cov tuyere composite refractory cib yog ib feem nrog qhov sib txawv ntawm qhov kub thiab txias tshaj plaws nyob rau hauv lub cub tawg, nws yog ib qho tsim nyog los xaiv cov ntaub ntawv refractory nrog zoo tiv thaiv kom txias sai thiab cua sov thiab slag yaig. Raws li kev paub txawv teb chaws thiab kev xyaum tsim khoom ntawm Anshan Hlau thiab Hlau Qhov No. 10 blast furnace, carbon cov ntaub ntawv zoo dua. Tom qab lub cub tawg tau txais cov pa roj carbon block-ceramic khob hauv ob sab phlu, txoj cai moj tej tawg rauv smelting txoj cai tau hloov pauv tseem ceeb, feem ntau tshwm sim hauv:
(1) Qhov kub gradient ntawm lub cub tawg refractory txheej txheej tau hloov pauv, thiab qhov kub thiab txias ntawm lub qhov cub hauv ob sab phlu refractory bricks ze rau slag hlau nto tau nce. Ib nrab xyoo tom qab lub cub tawg tau qhib, qhov kub ntawm lub khob khob txheej thiab cov pa roj carbon thaiv qhov chaw yog feem ntau nyob rau hauv thaj tsam ntawm 800 ~ 950 degree. Yog tias nws qis dua 750 degree (qhov sib txawv ntawm ntau tshaj 100 degree), nws qhia tau tias cov phab ntsa rauv yog tuab.
(2) Lub cev kub ntawm molten hlau yog nce. Rau blast furnaces ntawm tib lub ntim, nyob rau hauv cov xwm txheej uas Si cov ntsiab lus ntawm npua hlau tsis txawv ntau, lub molten hlau kub nrog thiab tsis muaj ceramic khob yog nce los ntawm 18-21 degree .
(3) Raws li kev tsim khoom ib txwm muaj, thaum cov ntsiab lus ntawm silicon ntawm npua hlau yog li ntawm 0.35%, nws yog sib npaug rau lub cev kub ntawm lub qhov cub tawg tsis muaj ceramic khob txheej thaum silicon cov ntsiab lus ntawm npua hlau yog { {3}}.50% ~0.55%. Yog li ntawd, cov ntsiab lus silicon ntawm npua hlau tuaj yeem raug txo los ntawm 0.15% -0.20%, thiab cov coke piv tau txo los ntawm 6 ~ 8kg / t ntawm qhov nruab nrab.
(4) Tom qab qhov kub ntawm lub cub tawg tau nce, qhov fluidity ntawm slag hlau yog txhim kho, thiab kev hloov kho ntawm lub cub tawg rau cov kev hloov ntawm sab nraud yog txhim kho.
(5) Thaum lub qhov cub kub kub tsis tu ncua (2 ~ 3 zaug) qis dua qhov qis qis teev los ntawm thermal system, slag hlau tseem tuaj yeem ntws ib txwm.
(6) Thaum thawj cov hlau tawm tom qab lub sij hawm ntev ntawm cua nres (ntau tshaj 8 teev ntawm cua nres), lub cev kub ntawm lub slag hlau yog nce, lub fluidity yog zoo dua, thiab lub qhov ncauj hlau yog yooj yim kom raug. .
(7) Thaum lub cub tawg kub siab ntev ntev (Si yog nyob rau hauv thaj tsam ntawm 0.5% ~ 1.0%) thiab cov ntsiab lus sulfur tsawg, cov phab ntsa rauv yog yooj yim. kom thickening, thiab saib xyuas yuav tsum tau them rau kev tiv thaiv.
