Yam cuam tshuam rau tus nqi siab ntawm alumina cib
Nws nyob ntawm cov ntsiab lus tshwj xeeb ntawm aluminium ntawm high-alumina cib, vim hais tias cov ntsiab lus ntawm aluminium yog txawv thiab tus nqi sib txawv. Nyob rau hauv high alumina cov ntaub ntawv xws li alumina, mullite thiab corundum, ntxiv kyanite, andalusite los yog sillimanite (peb lub pob zeb), los yog ntxiv ib tug compound ntawm cov minerals, yuav ho txhim kho lub microstructure ntawm cov khoom, thiaj li mus txhim kho thiab txhim kho cov tsoos zoo. refractory khoom, los yog tsim ntau yam tshiab. Ntxiv rau sillimanite cib rau blast furnaces thiab low-creep cib rau kub moj tej tawg qhov cub, cov tshiab ntau yam xws li: high-load softening kub nws siab thermal shock siab alumina cib, micro-expansion siab alumina cib, cement kilns thiab hluav taws xob furnaces Phosphate. qhov siv rau sab saum toj.
(1) Thaum kyanite concentrate yog ntxiv rau high-alumina cov ntaub ntawv, ib tug loj npaum li cas ntawm mullite yog tsim ntawm 1300 ° C. Qhov no mullite yog thawj mullite. Tom qab ntawd, ob qho piv txwv ntawm KDKC (alumina + } kyanite) thiab KCC (corundum + kyanite) ob qho tib si tau nce zoo heev nrog qhov nce ntawm qhov kub ntawm calcination. Qhov no qhia tau hais tias SiO2 tsim los ntawm decomposition thiab transformation ntawm kyanite reacts nrog alumina los yog corundum los ua mullite, uas yog theem nrab mullite.
Ob qho qauv (KDKC thiab KCC) ua tiav qhov thib ob mullite ntawm qhov kub sib txawv. Los ntawm kev tshuaj xyuas ntawm cov ntsiab lus tsim tawm mullite, KDKC cov qauv muaj cov ntsiab lus mullite ntawm 86% ntawm 1500 ° C, qhia tias qhov thib ob mulliteization tau ua tiav ntawm qhov kub no. Nyob rau hauv cov qauv KCC, ntawm 1500 ℃, cov ntsiab lus mullite yog 67%, qhia tias nyob rau hauv qhov kub thiab txias, qhov thib ob mulliteization tsis tiav. Txawm hais tias qhov ntsuas kub nce mus txog 1600 ℃, qhov tsim ntawm mullite tsuas yog 77%, thiab tseem muaj 14% corundum. , tseem tsis tau ua tiav qhov thib ob mullite petrochemical. Cov qauv corundum + kyanite ua tiav qhov thib ob mulliteization tsuas yog thaum qhov kub siab tshaj 1600 ° C.
Cov kev sib tham saum toj no qhia tau hais tias muaj qhov sib txawv ntawm qhov ua tiav qhov kub thiab txias ntawm theem nrab mullite rau bauxite + kyanite thiab corundum + kyanite, qhov qub yog qhov yooj yim, qhov kawg yog qhov nyuaj dua. Qhov laj thawj yog vim li cas bauxite muaj qhov me me me dua li corundum, thiab vim tias bauxite clinker muaj ntau cov impurities xws li TiO2 thiab Fe2O3, nws yooj yim dua rau hnov mob.
