Steel Txheej Txheem Thiab Flowchart

Cov txheej txheem steel feem ntau suav nrog cov txheej txheem xws li hlau ua, steel ua, thiab dov.

Pebxav qhia qee cov ntsiab lus ntawm no hnub no.

(1) Hlau ua:Nws yog cov txheej txheem ntawm kev txo cov hlau los ntawm sintered ore thiab thaiv ore. Coke, sintered ore, thiab thaiv ore, nrog rau me me ntawm limestone, raug xa mus rau lub qhov cub tawg rau smelting rau hauv cov kua npua hlau (molten hlau), uas tom qab ntawd xa mus rau steelmaking cog raws li raw khoom rau steelmaking.

Ironmaking yog ib qho kev txo qis. Ua ntej, oxygen yog siv los oxidize hlau thiab lwm yam khoom nyob rau hauv lub ore mus rau hauv oxides ntawm hlau trioxide, sulfur, phosphorus, thiab lwm yam. Lub sparse oxide yog tawm tom qab kev kho mob, thiab cov phosphorus oxide kuj ntxiv nrog txiv qaub thiab hloov mus rau hauv slag ua ntej yuav tawm mus. . Cov tshuaj tiv thaiv tseem ceeb yog siv C los txo cov hlau oxide los ntawm 2 Fe203+3C=4 Fe+3 C02.

(2) Steelmaking:Nws yog cov txheej txheem ntawm kev tshem tawm cov impurities ntau dhau xws li carbon, sulfur, thiab phosphorus los ntawm cov khoom siv raw (xws li cov hlau molten thiab cov hlau seem) thiab ntxiv cov khoom tsim nyog ntawm cov khoom siv hlau.

Steelmaking yog oxidation cov tshuaj tiv thaiv, uas yog ntxiv ua tom qab ironmaking. Lub hom phiaj tseem ceeb yog tshem tawm ntau tshaj C los ntawm Fe, raws li cov ntsiab lus siab ntawm C cuam tshuam rau qhov toughness ntawm cov hlau. Cov qauv tshuaj tiv thaiv yog: C + O2=CO2.

(3) Nruam casting:Cov hlau molten yog txuas ntxiv mus rau hauv dej-txias crystallizer los ntawm lub tank nruab nrab, khov rau hauv lub plhaub, rub tawm ntawm lub crystallizer ntawm qhov ceev ruaj khov, thiab tom qab ntawd txias los ntawm cov tshuaj tsuag dej. Tom qab nws tau ua tiav tag nrho, nws raug txiav rau hauv qhov ntev ntev rau kev nruam casting (CCM).

(4) Rolling steel:Cov hlau uas tsim los ntawm kev nruam nruam thiab cov hlau uas tsim los ntawm kev nruam casting kuj tau dov rau hauv ntau hom hlau los ntawm kev sib txawv dov mills los ntawm kub dov, tsim cov khoom.