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Hom thiab lub cev muaj zog ntawm cov khoom refractories

White corundum section sand

1, Dab tsi yog refractory?

Cov ntaub ntawv refractory feem ntau yog xa mus rau cov khoom siv tsis zoo uas tsis yog xim hlau nrog cov hluav taws kub ntawm ntau tshaj 1580 ℃.Nws suav nrog ntuj ores thiab ntau yam khoom tsim los ntawm qee cov txheej txheem raws li qee lub hom phiaj xav tau.Nws muaj tej yam kub-kub mechanical zog thiab zoo ntim stability.Nws yog ib qho khoom siv tsim nyog rau txhua yam khoom siv kub kub.Nws muaj ntau yam kev siv.

2, Hom refractories

1. Acid refractories feem ntau yog xa mus rau refractories nrog SiO2 cov ntsiab lus ntau dua 93%.Nws lub ntsiab feature yog tias nws muaj peev xwm tiv taus qhov yaig ntawm cov kua qaub slag ntawm qhov kub thiab txias, tab sis nws yog ib qho yooj yim rau react nrog alkaline slag.Silica bricks thiab av nplaum cib feem ntau yog siv los ua cov kua qaub refractories.Silica cib yog cov khoom siv siliceous uas muaj ntau dua 93% silicon oxide.Cov khoom siv raw siv xws li silica thiab khib nyiab silica cib.Nws muaj zog tiv taus acid slag yaig, siab load softening kub, thiab tsis ntsws los yog txawm nthuav me ntsis tom qab rov calcination;Txawm li cas los xij, nws yog ib qho yooj yim rau eroded los ntawm alkaline slag thiab tsis zoo thermal kev co kuj.Silica cib feem ntau yog siv hauv coke qhov cub, iav rauv, acid steel rauv thiab lwm yam khoom siv thermal.Av nplaum cib siv cov av nplaum refractory ua cov khoom siv tseem ceeb thiab muaj 30% ~ 46% alumina.Nws yog ib qho tsis muaj zog acidic refractory nrog zoo thermal kev co kuj thiab corrosion kuj rau acidic slag.Nws yog dav siv.

2. Alkaline refractories feem ntau xa mus rau refractories nrog magnesium oxide lossis magnesium oxide thiab calcium oxide ua cov khoom tseem ceeb.Cov refractories no muaj siab refractoriness thiab muaj zog tiv taus alkaline slag.Piv txwv li, magnesia cib, magnesia chrome cib, chrome magnesia cib, magnesia aluminium cib, dolomite cib, forsterite cib, thiab lwm yam Nws yog tsuas yog siv nyob rau hauv alkaline steel-ua rauv, non-ferrous hlau smelting rauv thiab cement kiln.

3. Aluminium silicate refractories xa mus rau refractories nrog SiO2-Al2O3 ua cov khoom tseem ceeb.Raws li cov ntsiab lus Al2O3, lawv tuaj yeem muab faib ua semi siliceous (Al2O3 15 ~ 30%), clayey (Al2O3 30 ~ 48%) thiab siab alumina (Al2O3 ntau dua 48%).

4. Melting thiab casting refractory yog hais txog cov khoom refractory nrog ib tug tej yam zoo cam khwb cia tom qab melting lub batch ntawm kub kub los ntawm ib tug tej yam txoj kev.

5. Cov refractories nruab nrab yog hais txog cov refractories uas tsis yooj yim rau reacts nrog acidic los yog alkaline slag ntawm qhov kub thiab txias, xws li carbon refractories thiab chromium refractories.Qee tus kuj ntaus nqi siab alumina refractories rau pawg no.

6. Tshwj xeeb refractories yog cov tshiab inorganic nonmetallic cov ntaub ntawv tsim los ntawm cov tsoos ceramics thiab dav refractories.

7. Amorphous refractory yog ib qho kev sib xyaw ua ke ntawm refractory aggregate, hmoov, binder los yog lwm yam admixtures nyob rau hauv ib qho kev faib ua feem, uas yuav siv tau ncaj qha los yog tom qab tsim nyog cov kua.Unshaped refractory yog ib yam tshiab ntawm refractory yam tsis muaj calcination, thiab nws cov hluav taws kub tsis tsawg tshaj 1580 ℃.

3, Dab tsi yog cov refractories nquag siv?

Cov refractories feem ntau siv xws li silica cib, semi silica cib, av nplaum cib, siab alumina cib, magnesia cib, thiab lwm yam.

Cov ntaub ntawv tshwj xeeb feem ntau siv xws li AZS cib, corundum cib, ncaj qha sib txuas magnesium chromium cib, silicon carbide cib, silicon nitride bonded silicon carbide cib, nitride, silicide, sulfide, boride, carbide thiab lwm yam uas tsis yog oxide refractories;Calcium oxide, chromium oxide, alumina, magnesium oxide, beryllium oxide thiab lwm yam ntaub ntawv refractory.

Feem ntau siv thermal rwb thaiv tsev thiab cov ntaub ntawv refractory muaj xws li diatomite khoom, asbestos khoom, thermal rwb thaiv tsev board, thiab lwm yam.

Cov khoom siv feem ntau siv amorphous refractory muaj xws li cov khoom siv hluav taws kub nyhiab, cov khoom siv hluav taws xob tiv thaiv hluav taws, cov hluav taws kub-resistant castables, hluav taws-resistant plastics, hluav taws-resistant av nkos, hluav taws-resistant phom phom, hluav taws-resistant projectiles, hluav taws-resistant txheej, hluav taws kub-resistant. -resistant castables, phom av nkos, ceramic li qub, thiab lwm yam.

4, Dab tsi yog lub cev khoom ntawm refractories?

Lub cev muaj zog ntawm cov khoom siv hluav taws xob muaj xws li cov khoom siv hluav taws xob, cov khoom siv thermal, cov khoom siv kho tshuab, cov khoom siv thiab cov khoom siv ua haujlwm.

Cov yam ntxwv ntawm refractories muaj xws li porosity, bulk ntom, dej nqus, huab cua permeability, pore loj faib, thiab lwm yam.

Cov khoom siv thermal ntawm refractories muaj xws li thermal conductivity, thermal expansion coefficient, tshwj xeeb tshav kub, tshav kub muaj peev xwm, thermal conductivity, thermal emissivity, thiab lwm yam.

Cov khoom siv ntawm cov khoom siv hluav taws xob muaj xws li compressive zog, tensile zog, flexural zog, torsional lub zog, shear zog, cuam tshuam lub zog, hnav tsis kam, creep, daim ntawv cog lus zog, elastic modulus, thiab lwm yam.

Cov kev pab cuam ntawm refractories muaj xws li hluav taws kub, load softening kub, reheating kab hloov, thermal poob siab kuj, slag kuj, acid kuj, alkali tsis kam, hydration kuj, CO yaig kuj, conductivity, oxidation kuj, thiab lwm yam.

Kev ua haujlwm ntawm cov khoom siv refractory suav nrog kev sib xws, poob qis, fluidity, plasticity, cohesiveness, resilience, coagulability, hardenability, thiab lwm yam.


Post lub sij hawm: Mar-15-2022