Qhov zoo ntawm cov khoom siv aluminium siab:

Qhov zoo ntawm cov khoom siv aluminium siab:

Cov khoom siv alumina siab muaj cov thermal conductivity ntau dua li cov av nplaum cib, uas cuam tshuam rau kev txo cov iav theem thiab nce ntawm mullite lossis corundum crystals hauv cov khoom alumina siab.

Kev ua haujlwm kub ntawm cov khoom siv aluminium siab yog cuam tshuam nrog microstructure ntawm cov khoom, thiab qhov kub-kub tsis kam ntawm cov matrix feem yog qis dua li ntawm cov khoom particle. Thaum siv, lub slag melts qhov ua ntej. Yog li ntawd, kev txhim kho thiab kho cov matrix muaj pes tsawg leeg thiab cov qauv ntawm cov khoom tuaj yeem siv los txhim kho nws cov kev ua haujlwm siab.

High alumina refractory products are refractory bricks with a w (Al, O,) content of over 48% made by combining a certain amount of high alumina bauxite clinker with clay. High alumina bricks can usually be divided into three categories, namely Class I: w (AI2O3)>75% (feem ntau tsawg dua 90% ua los ntawm ntuj alumina raw khoom); Qib II: w (Al, O,) =65% rau 75%; Qib III: w (Al, O3) =48% mus rau 65%.

Nws tuaj yeem raug cais raws li nws cov ntxhia muaj pes tsawg leeg, suav nrog tsawg mullite (xws li sillimanite), mullite, mullite corundum, corundum, mullite, thiab corundum. Nrog rau qhov nce ntawm AI, O, thiab cov ntsiab lus hauv cov khoom, cov khoom ntawm mullite thiab corundum kuj nce, thiab cov iav theem sib raug zoo, yog li txhim kho qhov hluav taws kub ntawm cov khoom. Thaum w (AlO) nyob rau hauv cov khoom yog tsawg dua 72%, tsuas yog high-temperature ruaj khov theem nyob rau hauv cov khoom yog mullite, uas nce nrog AL thiab O. Cov ntsiab lus nce thiab nce. Rau cov khoom siv aluminium siab nrog w (AlOs) saum toj no 72%, qhov kub-kub ruaj khov crystalline theem yog mullite thiab corundum. Raws li cov ntsiab lus ntawm Al, O nce, tus nqi ntawm corundum nce, thaum lub sij hawm tus nqi ntawm mullite txo, coj mus rau kev txhim kho cov high-temperature kev ua tau zoo ntawm cov khoom.

High alumina bauxite raw khoom, tseem hu ua bauxite, bauxite, bauxite, los yog bauxite. Cov qauv ntawm bauxite ore muab faib ua ntom, ntxeem tau, burly, thiab ntxhib duab. Raws li cov ntxhia muaj pes tsawg leeg, nws tuaj yeem muab faib ua monohydrate type bauxite thiab trihydrate type bauxite, tab sis feem ntau yog tsim los ntawm boehmite thiab kaolinite. Kev tsim cov siab alumina cib yuav tsum muaj siab alumina alumina clinker. High alumina bauxite clinker yog tau los ntawm high-temperature calcination ntawm bauxite raw cov ntaub ntawv nyob rau hauv teb kilns los yog ntsug kilns, kom ua tau ib tug tej yam porosity, dej nqus, thiab ntim ceev, thiab tsim ib tug kuj ruaj khov theem muaj pes tsawg leeg thiab microstructure. Lub calcination ntawm bauxite tuaj yeem muab faib ua peb theem: decomposition, theem nrab mullitization, thiab recrystallization sintering theem.

Cov txheej txheem ntau lawm cov yam ntxwv ntawm siab alumina cib zoo ib yam li cov txheej txheem ntau lawm ntawm cov khoom siv clinker av nplaum. Cov txheej txheem tsim khoom yuav tsum tau txiav txim siab raws li cov xwm txheej xws li cov xwm txheej tsim khoom tshwj xeeb, cov yam ntxwv ntawm cov khoom siv raw, cov khoom xav tau, thiab cov xwm txheej tsim khoom. nruj me ntsis cais cov clinker blocks ua ntej crushing, khaws thiab tshem tawm cov hlau los ntawm cov ntaub ntawv granular, thiab finely grind cov sib tov ntawm clinker thiab khi av nplaum.

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