Magnesia tuag(DBM), tseem hu ua tuag hlawv magnesia lossis sintered magnesia, tseem yog ib qho ntawm cov khoom tseem ceeb tshaj plaws hauv kev lag luam refractory. Nrog rau qhov kev thov ntau dua rau kev ua haujlwm ntawm lub cub tawg ntev dua, kev tiv thaiv corrosion ntau dua, thiab kev ua haujlwm thermal ruaj khov, DBM tseem ua tus thawj coj ntawm kev lag luam refractory. Tab sis dab tsi ua rau cov khoom no tseem ceeb heev rau kev tsim steel, cement kilns, tsis yog -ferrous metallurgy, thiab ntau yam kev kub siab -?
1. Deadburned Magnesia yog dab tsi?
DBM yog tsim los ntawm calcining ntuj magnesite ntawm 1800-2000℃nyob rau hauv teb kilns, ncej kilns, los yog ntsug rauv. Qhov kub tua hluav taws kub tshem tawm CO₂ tag nrho thiab tsim cov qauv ntom ntom ntawm cov pob zeb loj periclase (MgO).
Piv nrog rau caustic calcined magnesia (CCM), DBM nthuav tawm:
Cov tshuaj reactivity tsawg heev
Siab tsis kam mus rau hauv paus slags
Tsawg porosity
Kev ruaj ntseg zoo heev ntawm qhov kub thiab txias
Cov yam ntxwv no ua rau tuag hlawv magnesia lub hauv paus rau cov refractories yooj yim siv hauv steel, cement, thiab iav industries.
2. DBM Microstructure: Vim Li Cas Tsawg Reactivity Matters
Deadburned magnesia yog lub npe hu ua "tuag hlawv" vim tias qhov siab - kub kub txheej txheem: Tshem tawm cov txiv qaub dawb
Stabilizes periclase nplej
Minimizes hydration nyiam
Txo kev nthuav dav tsis xws luag
Qhov no microstructure yog ib qho tseem ceeb nyob rau hauv kev zam: cracking, Spalling, Hydration -txog disintegration, premature refractory tsis ua hauj lwm
Hauv qhov sib piv, reactive CCM tsis tuaj yeem tiv taus tib yam thermal thiab tshuaj lom neeg kev ntxhov siab.
3. Vim li cas Deadburned Magnesia yog qhov tseem ceeb rau Refractories
(1) Zoo heev Slag Resistance
DBM yog cov khoom siv zoo tshaj plaws rau kev tawm tsam:
Steel ladle Basic slag
Cement kiln plua plav thiab clinker
Siab -alkali thiab hlau- nplua nuj cua sov cua sov
Nws ntom ntom periclase qauv slows slag nkag mus, txhim kho refractory ntev.
(2) Siab -Tsub Mechanical Strength
DBM tswj kev ncaj ncees siab tshaj 1700 degree, ua rau nws zoo tagnrho rau: Teb kiln burning zones, converter linings, Hluav taws xob arc rauv (EAF) slag kab, Hlau ladle ua hauj lwm linings
Txawm tias nyob rau hauv qhov kub thiab txias hloov ceev, DBM refractories qhia tau tshwj xeeb durability.
(3) Muaj zog Thermal Shock Resistance (thaum ua ke nrog Spinel lossis Carbon)
Thaum cov ntshiab DBM muaj cov thermal shock tsis kam, nws ua tau zoo tshwj xeeb hauv cov tshuab sib xyaw xws li: Magnesia-chrome bricks, Magnesia-carbon bricks, Magnesia-spinel cib
Qhov no ua rau DBM tseem ceeb hauv cov hlau thiab tsis yog -ferrous metallurgy.
(4) Compatibility nrog Additives
Tuag hlawv magnesia blends zoo nrog: Fused magnesia, Zirconia, Chrome ore, Alumina, Graphite
Qhov kev hloov pauv no tso cai rau cov kws ua haujlwm tsim kho cov txheej txheem refractory rau cov cua sov tshwj xeeb.
4. Kev siv ntawm Deadburned Magnesia thoob plaws kev lag luam
Kev lag luam Steelmaking (Cov neeg siv khoom loj tshaj plaws), Cov Hluav Taws Xob Hluav Taws Xob (BOF), Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob (EAF), Ladle ua haujlwm hauv ob sab phlu, cov khoom siv phom phom, EAF hauv qab thiab kho thaj tsam slag;
Kev lag luam steel siv ntau DBM dua li lwm yam kev lag luam, tshwj xeeb tshaj yog siab -purity DBM 97%.
Kev lag luam cement
Rotary kilns xav tau refractories uas tuaj yeem tiv taus alkali nres thiab clinker abrasion. DBM 90-95% yog dav siv nyob rau hauv: Burning cheeb tsam bricks, Transition zone linings, Pre- khoom siv calciner
Tsis yog -Ferrous Metallurgy
DBM muaj kev tiv thaiv corrosion zoo heev hauv: Nickel thiab tooj liab converters, Ferroalloy furnaces, High -alkali smelting ib puag ncig
Iav thiab txiv qaub Industries
DBM yog siv nyob rau hauv: Regenerator checkers, Melting cheeb tsam refractories, txiv qaub kiln txias cheeb tsam linings, Nws stability pab kom sov sov uniformity thiab lub zog efficiency.
5. Sib piv: Deadburned Magnesia vs. Fused Magnesia
| Khoom | DBM | FM |
|---|---|---|
| Purity | 90-97% MgO | 97-99% MgO |
| Qhov ntom | Nruab nrab-siab | Siab heev |
| Slag kuj | Zoo heev | Superior |
| Thermal shock | Zoo | Nruab nrab |
| Nqe | qis | Siab dua |
| Daim ntawv thov | General refractory bricks & castables | Cov cheeb tsam corrosion hnyav |
Xaiv DBM rau tus nqi - ua haujlwm siab - kev ua haujlwm refractories.
Xaiv FM rau cov xwm txheej hnyav heev.
6. Ntiaj teb no DBM Market Trends hauv 2025
Ntau yam cuam tshuam rau DBM tus nqi thiab khoom siv:
Mining txwv nyob rau hauv Suav teb (cov neeg tsim khoom loj tshaj plaws hauv ntiaj teb)
Zog thiab calcination nqi
Dej hiav txwv freight nqi
Ib puag ncig yuav tsum tau ua rau magnesite ua
7. Yuav ua li cas thiaj xaiv tus neeg muab khoom siv DBM ntseeg tau?
Thaum muab DBM, xav txog:
Ruaj khov MgO purity (± 0.2%), Tsawg CaO / SiO₂ impurities; Uniform grain loj; Qhov kub thiab txias sib xws; COA + TDS muaj; Muaj zog ntim rau export
Xaiv tus khub zoo ua kom ruaj khov refractory ntau lawm thiab tsawg dua qhov cub tawg.
Deadburned magnesia tseem yog cov khoom siv tseem ceeb rau cov khoom siv hluav taws xob yooj yim vim nws: High - kub stability, Resistance to slag penetration, Compatibility with additives, cost-effectiveness.
Raws li kev lag luam nrhiav kev txuag hluav taws xob thiab kev sib tw ua kom ntev dua, qhov tseem ceeb ntawm - zoo DBM yuav loj hlob xwb.
