Magnesia Chrome Cib

Magnesia chrome bricks tau siv dav hauv kev lag luam thiab kev tsim kho vim tias lawv cov khoom muaj txiaj ntsig zoo xws li tiv tshav kub thiab tiv taus siab. Kuj tseem muaj ntau hom sib txawv ntawm magnesia chrome cib. Raws li qhov xav tau ntawm cov khoom sib txawv, feem ntau yog peb hom magnesia chrome cib. hom:

1. Raug magnesia chrome cib: raug magnesia chrome cib ua los ntawm cov khoom xyaw zoo ntawm magnesia zoo thiab chrome ore. Cov ntsiab lus ntawm Cr2O3 raug kho raws li qhov xav tau sib txawv. Cov khoom muaj thermal stability zoo thiab ua haujlwm kub. Nws yog dav siv hauv cov cement kilns thiab cov hlau tsis muaj hlau. Rauv thiab lwm yam.

2. Ncaj ua ke magnesia-chrome cib: Ncaj ua ke magnesia-chrome cib siv qis-tsis huv chrome ore thiab cov khoom siv high-purity magnesia zoo li raw khoom, tom qab kev kub siab molding, thiab kub kub kub ntawm qhov kub tshaj 1 ℃ Kev ua haujlwm kub zoo, muaj zog tiv taus slag yaig. Tiv taus cov cement clinker yaig. Nws tau siv dav hauv cov khoom siv hlau tsis yog hlau thiab cov cement rotary kilns.

3. Semi-recombined magnesia chrome bricks thiab recombined magnesia chrome bricks: ib nrab recombined magnesia chrome cib thiab recombined magnesia chrome cib, siv ib feem lossis tag nrho ntawm cov xuab zeb fused (fused hluavtaws xuab zeb) ua cov khoom siv raw, cov khoom xyaw zoo, kev kub siab molding, -Qhov ntsuas kub kom siab, ua kom muaj cov khoom sib txuas tau zoo, muaj zog cov khoom lag luam, ntim tau ruaj khov, dav siv hauv RH, VOD, AOD thiab lwm yam khoom siv ua kom zoo nkauj sab nraud, cov hlau tsis muaj hlau rauv, thiab lwm yam.

4. Magnesia chrome bricks yog alkaline refractory cov khoom uas muaj 55% txog 80% MgO thiab 8% mus rau 20% Cr2O3, muaj li ntawm periclase, sib xyaw spinel thiab me me ntawm theem silicate. Kev sib xyaw ua ke suav nrog MgAl2O4, MgFe2O4, MgCr2O4 thiab FeAl2O4 spinel cov ntsiab lus daws teeb meem.

Magnesia chrome bricks tau tsim tawm sai tom qab xyoo 1960 vim qhov nce ntawm cov khoom siv raw kom huv thiab tua kub. Tam sim no, magnesia chrome cib tuaj yeem faib ua cov cib zoo tib yam, cov cib sib txuas ncaj qha, cov cib sib xyaw ua ke, cov cib sib sau ua ke thiab cov cib nrum, thiab lwm yam.

(1) Ordinary magnesia chrome cib: Qhov no yog cov khoom lag luam ib txwm muaj, siv chrome ore ua cov ntxhib ntxhib thiab magnesia zoo li hmoov zoo. Los yog ob qho khoom siv tau tsim los ntawm cov qib kawm, thiab qhov ntsuas kub feem ntau yog 1550 ~ 1600 ° C. Lub microstructure ntawm cov cib no qhia tau tias muaj kev sib txuas me me ntawm cov chromite hais thiab periclase, feem ntau yog silicate (CMS) cementation lossis cais cais tawm; muaj ob peb theem uas tsis muaj nyob hauv periclase, thiab tsis muaj kev sib cuag ncaj qha hauv cov lej. Hauv kev ua ke, cov cib no muaj cov khoom siv tsis zoo thiab cov plag tsis zoo tiv taus xeb.

(2) Ncaj ncaj magnesia-chrome cib: Ncaj ncaj magnesia-chrome cib raug tsim los ntawm cov cib magnesia-chrome cib. Muaj ob yam tseem ceeb ntawm kev tsim khoom. Ib qho yog siv cov khoom siv raw raw, thiab lwm qhov yog kev siv hluav taws ntau dua. kub. Qhov hu ua kev sib txuas ncaj qha txhais tau tias muaj kev sib cuag ncaj qha ntawm cov chrome ore hais hauv cov cib thiab cov periclase, vim tias cov khoom siv raw muaj tsawg dua SiO2 (tswj qis dua 1% txog 25%), thiab cov silicate tsim tau me me. . Txoj kev tua yog nyem qhov silicate mus rau hauv cov ces kaum ntawm cov khoom ua tau zoo. Li no txhim kho kev sib txuas ncaj qha ntawm theem khoom.

Kev sib txuas ncaj qha magnesia-chrome cib muaj qib siab ntawm kev sib txuas ncaj qha, yog li cov cib muaj qhov kub siab dua lub zog, slag tsis kam, tiv taus xeb, tiv taus yaig, tiv taus xeb, tiv taus cua sov poob zoo thiab ntim ruaj khov ntawm 1800 ° C.

(3) Co-sintered magnesia-chrome cib: Cov txheej txheem tsim khoom ntawm cov khoom no yog tshwj xeeb los ntawm cov cua kub kub ua kom sov sib tov ntawm magnesia thiab chromium ore hmoov zoo hauv qee qhov piv txwv kom ua tiav cov tiam thib ob spinel thiab magnesia-chrome ore Solid-phase cov tshuaj tiv thaiv rau lub hom phiaj ntawm kev sib txuas ncaj qha los npaj cov khoom siv sib xyaw ua ke, uas yog siv los tsim cov khoom lag luam lossis cov khoom sib txuas ua tshuaj lom neeg.

Kev sib txuas ncaj qha thiab microstructure tsis sib xws ntawm co-sintered magnesia-chrome cib yog qhov zoo dua li cov cib ncaj qha sib raug. Tus nqi ntawm periclase desolubilization theem thiab intergranular secondary spinel ntau dua. Co-sintered magnesia-chrome cib muaj cov txheej txheem ncaj qha Ua ke nrog kev ua tau zoo dua ntawm cov cib, nws tshwj xeeb tshaj yog nto npe rau nws lub zog kub siab, tiv taus kub sai thiab tiv taus slag. Cov cib sib tsoo sib xyaw kuj tseem tuaj yeem faib ua ob hom, ib qho yog cov cib ua sintered ntau, tag nrho cov khoom siv sib xyaw ua ke ntawm cov khoom sib xyaw thiab cov hmoov zoo, txawm tias nws raug rho tawm lossis sib xyaw ua ke, nws cov microstructure zoo ib yam; Qhov thib ob yog ib feem ntau rau Cov cib sintered, muaj ib feem ntawm cov khoom xyaw, xws li cov khoom sib xyaw ua ke rau cov ntxhib ntxhib, thiab cov hmoov zoo ib yam tuaj yeem sib xyaw rau hauv cov cib hauv qee qhov sib piv nrog nplua chrome ore thiab magnesia ntawv hmoov , yog li ntawd cov khoom uas raug rho tawm thiab sib xyaw ua ke yuav ua kom me me Cov qauv sib txawv.

(4) Recombination ntawm magnesia-chromium cib: magnesia-chromium sib xyaw hmoov tau yaj los ntawm txoj kev siv hluav taws xob yaj, thiab cov yaj yog crystallized los tsim kom muaj cov microstructure zoo ib yam, nrog magnesia-chromium spinel thiab periclase sib xyaw muaju ua lub hauv paus tseem ceeb Cov khoom siv magnesia-chromium fused raug tsoo rau qee qhov me me, sib xyaw thiab ua pwm, thiab tom qab ntawd raug rho tawm haujlwm los npaj cov av sib xyaw ua ke, lossis siv ncaj qha ua cov cib cemented.

Lub microstructure ntawm cov cib ua ke yog tus yam ntxwv ntawm qib siab ntawm kev sib txuas ncaj qha thiab ntau ntau ntawm cov theem spinel desolvent: lub hauv paus siv lead ua uas muaj ntau ntau ntawm theem uas tsis muaj qhov tseem ceeb hloov pauv lub cev thiab tshuaj lom neeg ntawm periclase, xws li txo cov cua sov nthuav dav coefficient. , Txhim kho cov cua sov tiv taus, txhim kho tsis kam rau acid-alkaline slag yaig. Cov cib ua ke muaj cov khoom zoo sib xws rau cov cib fused-cam khwb cia, tab sis muaj kev tiv thaiv zoo dua rau qhov hloov pauv kub sai thiab muaj cov qauv zoo sib xws ntau dua li cov cib fused-nrum.

Ua ke nrog magnesia chrome cib, nws yog qhov ua tau zoo sib xyaw nrog qhov sib faib pore zoo ib yam thiab microcracks, thiab nws qhov rhiab heev rau qhov hloov pauv sai sai hauv qhov kub tau zoo dua li ntawm yaj thiab casting. Kev ua haujlwm kub-siab ntawm cov khoom yog nruab nrab ntawm cov fused-cam khwb cia cib thiab cov cib ncaj qha sib txuas.

(5) Fused thiab cam khwb cia magnesia chrome cib: Muab cov sib xyaw ntawm magnesia thiab chrome ore tso rau hauv hluav taws xob hluav taws xob ua kom tawg tag, thiab tom qab ntawd nchuav cov yaj mus rau hauv cov khoom siv hluav taws xob rau casting. Thaum lub sijhawm ua cov txheej txheem khov kho, ruaj khov periclase thiab spinel cov theem siv lead ua tau tsim, thiab cov qauv siv lead ua zoo tau tsim nyob rau tib lub sijhawm, yog li cov cam khwb cia magnesia chrome cib muaj qhov kub zoo zog thiab slag corrosion kuj.

Magnesium chrome cib feem ntau yog siv hauv kev lag luam hlau, xws li kev tsim kho qhib lub qhov cub hluav taws kub saum lub qhov cub, hluav taws kub saum, hluav taws kub ua kom tsis huv thiab ntau yam uas tsis yog hlau ua rauv taws. Qhov kub thiab txias ib feem ntawm phab ntsa ntawm lub tshuab hluav taws xob hluav taws xob ultra-high yog ua los ntawm fused-cam khwb cia magnesia-chrome cib, thaj chaw uas muaj kev yaig ntawm lub tshuab ua kom sov sab nraum lub cub tawg yog ua los ntawm cov khoom siv hluavtaws, thiab siab -erosion cheeb tsam ntawm cov hlau uas tsis yog-ferrous flash smelting rauv yog ua los ntawm fused-cam khwb cia magnesia-chrome cib thiab cov khoom siv hluavtaws. Ua los ntawm magnesia chrome bricks. Ib qho ntxiv, magnesia-chrome cib kuj tseem siv nyob rau hauv qhov chaw hlawv ntawm cov cement rotary kilns thiab tsim cov iav kilns.

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Magnesia Chrome Cib

Magnesia chrome bricks tau siv dav hauv kev lag luam thiab kev tsim kho vim tias lawv cov khoom muaj txiaj ntsig zoo xws li tiv tshav kub thiab tiv taus siab. Kuj tseem muaj ntau hom sib txawv ntawm magnesia chrome cib. Raws li qhov xav tau ntawm cov khoom sib txawv, feem ntau yog peb hom magnesia chrome cib. hom:

1. Raug magnesia chrome cib: raug magnesia chrome cib ua los ntawm cov khoom xyaw zoo ntawm magnesia zoo thiab chrome ore. Cov ntsiab lus ntawm Cr2O3 raug kho raws li qhov xav tau sib txawv. Cov khoom muaj thermal stability zoo thiab ua haujlwm kub. Nws yog dav siv hauv cov cement kilns thiab cov hlau tsis muaj hlau. Rauv thiab lwm yam.

2. Ncaj ua ke magnesia-chrome cib: Ncaj ua ke magnesia-chrome cib siv qis-tsis huv chrome ore thiab cov khoom siv high-purity magnesia zoo li raw khoom, tom qab kev kub siab molding, thiab kub kub kub ntawm qhov kub tshaj 1 ℃ Kev ua haujlwm kub zoo, muaj zog tiv taus slag yaig. Tiv taus cov cement clinker yaig. Nws tau siv dav hauv cov khoom siv hlau tsis yog hlau thiab cov cement rotary kilns.

3. Semi-recombined magnesia chrome bricks thiab recombined magnesia chrome bricks: ib nrab recombined magnesia chrome cib thiab recombined magnesia chrome cib, siv ib feem lossis tag nrho ntawm cov xuab zeb fused (fused hluavtaws xuab zeb) ua cov khoom siv raw, cov khoom xyaw zoo, kev kub siab molding, -Qhov ntsuas kub kom siab, ua kom muaj cov khoom sib txuas tau zoo, muaj zog cov khoom lag luam, ntim tau ruaj khov, dav siv hauv RH, VOD, AOD thiab lwm yam khoom siv ua kom zoo nkauj sab nraud, cov hlau tsis muaj hlau rauv, thiab lwm yam.

4. Magnesia chrome bricks yog alkaline refractory cov khoom uas muaj 55% txog 80% MgO thiab 8% mus rau 20% Cr2O3, muaj li ntawm periclase, sib xyaw spinel thiab me me ntawm theem silicate. Kev sib xyaw ua ke suav nrog MgAl2O4, MgFe2O4, MgCr2O4 thiab FeAl2O4 spinel cov ntsiab lus daws teeb meem.

Magnesia chrome bricks tau tsim tawm sai tom qab xyoo 1960 vim qhov nce ntawm cov khoom siv raw kom huv thiab tua kub. Tam sim no, magnesia chrome cib tuaj yeem faib ua cov cib zoo tib yam, cov cib sib txuas ncaj qha, cov cib sib xyaw ua ke, cov cib sib sau ua ke thiab cov cib nrum, thiab lwm yam.

(1) Ordinary magnesia chrome cib: Qhov no yog cov khoom lag luam ib txwm muaj, siv chrome ore ua cov ntxhib ntxhib thiab magnesia zoo li hmoov zoo. Los yog ob qho khoom siv tau tsim los ntawm cov qib kawm, thiab qhov ntsuas kub feem ntau yog 1550 ~ 1600 ° C. Lub microstructure ntawm cov cib no qhia tau tias muaj kev sib txuas me me ntawm cov chromite hais thiab periclase, feem ntau yog silicate (CMS) cementation lossis cais cais tawm; muaj ob peb theem uas tsis muaj nyob hauv periclase, thiab tsis muaj kev sib cuag ncaj qha hauv cov lej. Hauv kev ua ke, cov cib no muaj cov khoom siv tsis zoo thiab cov plag tsis zoo tiv taus xeb.

(2) Ncaj ncaj magnesia-chrome cib: Ncaj ncaj magnesia-chrome cib raug tsim los ntawm cov cib magnesia-chrome cib. Muaj ob yam tseem ceeb ntawm kev tsim khoom. Ib qho yog siv cov khoom siv raw raw, thiab lwm qhov yog kev siv hluav taws ntau dua. kub. Qhov hu ua kev sib txuas ncaj qha txhais tau tias muaj kev sib cuag ncaj qha ntawm cov chrome ore hais hauv cov cib thiab cov periclase, vim tias cov khoom siv raw muaj tsawg dua SiO2 (tswj qis dua 1% txog 25%), thiab cov silicate tsim tau me me. . Txoj kev tua yog nyem qhov silicate mus rau hauv cov ces kaum ntawm cov khoom ua tau zoo. Li no txhim kho kev sib txuas ncaj qha ntawm theem khoom.

Kev sib txuas ncaj qha magnesia-chrome cib muaj qib siab ntawm kev sib txuas ncaj qha, yog li cov cib muaj qhov kub siab dua lub zog, slag tsis kam, tiv taus xeb, tiv taus yaig, tiv taus xeb, tiv taus cua sov poob zoo thiab ntim ruaj khov ntawm 1800 ° C.

(3) Co-sintered magnesia-chrome cib: Cov txheej txheem tsim khoom ntawm cov khoom no yog tshwj xeeb los ntawm cov cua kub kub ua kom sov sib tov ntawm magnesia thiab chromium ore hmoov zoo hauv qee qhov piv txwv kom ua tiav cov tiam thib ob spinel thiab magnesia-chrome ore Solid-phase cov tshuaj tiv thaiv rau lub hom phiaj ntawm kev sib txuas ncaj qha los npaj cov khoom siv sib xyaw ua ke, uas yog siv los tsim cov khoom lag luam lossis cov khoom sib txuas ua tshuaj lom neeg.

Kev sib txuas ncaj qha thiab microstructure tsis sib xws ntawm co-sintered magnesia-chrome cib yog qhov zoo dua li cov cib ncaj qha sib raug. Tus nqi ntawm periclase desolubilization theem thiab intergranular secondary spinel ntau dua. Co-sintered magnesia-chrome cib muaj cov txheej txheem ncaj qha Ua ke nrog kev ua tau zoo dua ntawm cov cib, nws tshwj xeeb tshaj yog nto npe rau nws lub zog kub siab, tiv taus kub sai thiab tiv taus slag. Cov cib sib tsoo sib xyaw kuj tseem tuaj yeem faib ua ob hom, ib qho yog cov cib ua sintered ntau, tag nrho cov khoom siv sib xyaw ua ke ntawm cov khoom sib xyaw thiab cov hmoov zoo, txawm tias nws raug rho tawm lossis sib xyaw ua ke, nws cov microstructure zoo ib yam; Qhov thib ob yog ib feem ntau rau Cov cib sintered, muaj ib feem ntawm cov khoom xyaw, xws li cov khoom sib xyaw ua ke rau cov ntxhib ntxhib, thiab cov hmoov zoo ib yam tuaj yeem sib xyaw rau hauv cov cib hauv qee qhov sib piv nrog nplua chrome ore thiab magnesia ntawv hmoov , yog li ntawd cov khoom uas raug rho tawm thiab sib xyaw ua ke yuav ua kom me me Cov qauv sib txawv.

(4) Recombination ntawm magnesia-chromium cib: magnesia-chromium sib xyaw hmoov tau yaj los ntawm txoj kev siv hluav taws xob yaj, thiab cov yaj yog crystallized los tsim kom muaj cov microstructure zoo ib yam, nrog magnesia-chromium spinel thiab periclase sib xyaw muaju ua lub hauv paus tseem ceeb Cov khoom siv magnesia-chromium fused raug tsoo rau qee qhov me me, sib xyaw thiab ua pwm, thiab tom qab ntawd raug rho tawm haujlwm los npaj cov av sib xyaw ua ke, lossis siv ncaj qha ua cov cib cemented.

Lub microstructure ntawm cov cib ua ke yog tus yam ntxwv ntawm qib siab ntawm kev sib txuas ncaj qha thiab ntau ntau ntawm cov theem spinel desolvent: lub hauv paus siv lead ua uas muaj ntau ntau ntawm theem uas tsis muaj qhov tseem ceeb hloov pauv lub cev thiab tshuaj lom neeg ntawm periclase, xws li txo cov cua sov nthuav dav coefficient. , Txhim kho cov cua sov tiv taus, txhim kho tsis kam rau acid-alkaline slag yaig. Cov cib ua ke muaj cov khoom zoo sib xws rau cov cib fused-cam khwb cia, tab sis muaj kev tiv thaiv zoo dua rau qhov hloov pauv kub sai thiab muaj cov qauv zoo sib xws ntau dua li cov cib fused-nrum.

Ua ke nrog magnesia chrome cib, nws yog qhov ua tau zoo sib xyaw nrog qhov sib faib pore zoo ib yam thiab microcracks, thiab nws qhov rhiab heev rau qhov hloov pauv sai sai hauv qhov kub tau zoo dua li ntawm yaj thiab casting. Kev ua haujlwm kub-siab ntawm cov khoom yog nruab nrab ntawm cov fused-cam khwb cia cib thiab cov cib ncaj qha sib txuas.

(5) Fused thiab cam khwb cia magnesia chrome cib: Muab cov sib xyaw ntawm magnesia thiab chrome ore tso rau hauv hluav taws xob hluav taws xob ua kom tawg tag, thiab tom qab ntawd nchuav cov yaj mus rau hauv cov khoom siv hluav taws xob rau casting. Thaum lub sijhawm ua cov txheej txheem khov kho, ruaj khov periclase thiab spinel cov theem siv lead ua tau tsim, thiab cov qauv siv lead ua zoo tau tsim nyob rau tib lub sijhawm, yog li cov cam khwb cia magnesia chrome cib muaj qhov kub zoo zog thiab slag corrosion kuj.

Magnesium chrome cib feem ntau yog siv hauv kev lag luam hlau, xws li kev tsim kho qhib lub qhov cub hluav taws kub saum lub qhov cub, hluav taws kub saum, hluav taws kub ua kom tsis huv thiab ntau yam uas tsis yog hlau ua rauv taws. Qhov kub thiab txias ib feem ntawm phab ntsa ntawm lub tshuab hluav taws xob hluav taws xob ultra-high yog ua los ntawm fused-cam khwb cia magnesia-chrome cib, thaj chaw uas muaj kev yaig ntawm lub tshuab ua kom sov sab nraum lub cub tawg yog ua los ntawm cov khoom siv hluavtaws, thiab siab -erosion cheeb tsam ntawm cov hlau uas tsis yog-ferrous flash smelting rauv yog ua los ntawm fused-cam khwb cia magnesia-chrome cib thiab cov khoom siv hluavtaws. Ua los ntawm magnesia chrome bricks. Ib qho ntxiv, magnesia-chrome cib kuj tseem siv nyob rau hauv qhov chaw hlawv ntawm cov cement rotary kilns thiab tsim cov iav kilns.

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