Tshiab technology ntawm non-oxidation smelting nyob rau hauv ZGMnl3 alkaline induction melting rauv

(1) Melting period of induction melting furnace

Electricity melts. Supply 60% of the power within 6-8min after starting to energize, and gradually increase the power to the maximum after the current impact stops. Ramming flux. As the charge in the lower part of the crucible melts, pay attention to ramming at any time to prevent “bridging”, and continue to add charge. Slagging. After most of the charge is melted, add slagging material (lime powder: fluorite powder = 2: -1), and cover the molten steel with slagging material. The amount of slagging material added is 1%~1.5%. Sampling and slagging. When the charge is 95% melted, take a sample for analysis, and add the rest of the charge into the furnace. After the charge is melted, reduce the power to 40%~50%, dump the slag off the furnace, and make new slag.

(2) Txo lub sij hawm ntawm induction melting rauv

deoxidation. Tom qab lub slag melted, ntxiv ib deoxidizer (txiv qaub hmoov: txhuas hmoov = 1: 2) rau lub slag nto rau diffusion thiab deoxidation. Thaum lub sij hawm deoxidation txheej txheem, txiv qaub hmoov thiab fluorite hmoov yuav siv tau los kho cov viscosity ntawm slag kom lub slag muaj fluidity zoo. Kho cov khoom xyaw. Kho cov tshuaj muaj pes tsawg leeg ntawm cov hlau molten raws li kev soj ntsuam cov txiaj ntsig, thiab Si cov ntsiab lus yuav tsum tau hloov kho li ntawm 5-10 feeb ua ntej tapping.

Ntsuas qhov ntsuas kub thiab ua cov qauv khob puag ncig. Ntsuas qhov kub ntawm cov hlau molten thiab ua ib lub khob puag ncig los xyuas qhov deoxidation ntawm cov hlau molten (los yog siv txoj kev khoov lub kaum sab xis los txiav txim).

Ntxig calcium silicate. Tom qab molten steel kub mus txog 15OO ° C los yog siab dua (kub ntsuas), 0.2% calcium silicate yog muab tso rau ntxiv deoxidize, thiab ces deoxidizer ntxiv rau lub slag nto dua. Ntxig txhuas, tom qab cov hlau kub nce mus txog 1500 ° C los yog ntau tshaj, tshem tawm tag nrho cov slag, ces ntxiv 0.07% cryolite hmoov (los yog slagging npog tus neeg sawv cev) thiab ntxig txhuas.

(3) Steel tapping and pouring

Hlau tawm. Tom qab ntxig cov txhuas, do cov hlau molten thiab coj mus rhaub cov hlau tom qab fais fab tuag. Tom qab tapping, coj mus kuaj nyob rau hauv lub ladle rau tshuaj muaj pes tsawg leeg tsom xam ntawm cov tiav molten hlau. nchuav. Tom qab tapping, ntxiv nyom tshauv los npog lub molten steel nto los tiv thaiv cov hlau molten los ntawm oxidizing. Tom qab cov hlau molten raug tua rau 3-5 feeb, qhov kub ntawm lub ladle yog 1460-1480 ° C, thiab lub pouring kub yog 1340-1380 ° C, los yog qis dua los yog siab dua, nyob ntawm seb qhov yuav tsum tau casting.