Magnesium aluminium bricks tau yas ntws los ntawm 1000 degree C, uas yog qhov tseem ceeb ntawm 1200 degree C. Qhov ntws nrawm nrawm ntawm 1300 degree C. Cov no zoo ib yam li cov magnesium chromium cib thiab txawv ntawm magnesium cib, thiab cov dej ntws ceev ceev ntawm magnesium bricks yog 100 txog 200 rau 200. degree . Thaum tus nqi ntawm alumina ntxiv yog tsawg dua 15 feem pua, cov nyhuv ntawm magnesium aluminium cib thiab hlau oxide tsis ua kom nthuav dav, thiab cov nyiaj ntxiv tau nce mus txog micro-expansion thaum ntxiv yog 15 feem pua; ntawm 20 feem pua, nws yog pom tseeb dua; qhov nthuav dav yog qhov hnyav ntawm 28 feem pua.
Feem ntau ntawm magnesium bricks yog siv nyob rau hauv metallurgy kev lag luam. Vim qhov zoo thermal stability thiab kub siab siv ntawm magnesium aluminium bricks, nws yog tsuas yog siv rau qhov tseem ceeb xws li steelmaking ca furnaces. High-purity magnesium bricks yog siv nyob rau hauv qhov yooj yim eroded puas thaj chaw ntawm refining furnaces sab nraum lub cub tawg thiab sab nraum lub cub tawg. Magnesium carbon bricks yog tsuas yog siv rau qhov tseem ceeb ntawm converter, hluav taws xob rauv thiab tawm -of -furnace refinement rauv. Magnesium silicon cib los yog siab dua magnesium txiv ntseej cib uas muaj SIO2 tuaj yeem siv rau chav tsev kub thiab cov cement rotary kiln ntawm lub cub tawg thiab iav melting kiln. Lub melting hais yog ua ke nrog magnesium bricks, uas yog feem ntau yog siv nyob rau hauv lub tseem ceeb qhov chaw ntawm kev yaig loj heev nyob rau hauv lub cub tawg hluav taws xob, tawm ntawm lub cub tawg refining rauv thiab non-ferrous hlau smelting rauv.
1. The chemical components of magnesium aluminum bricks vary from the raw materials. ——It is MGO>81 feem pua, Al2O3 8.7 feem pua, SIO2<6.0%, CAO <1.5%, Fe2O3 <1.0%.
2. Sib nqus aluminium cib ntxhia muaj pes tsawg leeg. Nyob rau hauv nws cov ntxhia muaj pes tsawg leeg, lub ntsiab crystals yog magnesium pob zeb. Lub matrix muaj magnesium, magnesium olives, calcium magnesium olives, thiab magnesium aluminium spinels.
3. Qhov hluav taws kub tsis kam ntawm magnesium aluminium bricks thiab softening kub ntawm lotus hnyav. Nyob rau hauv magnesium aluminium cib, magnesium crystals thiab magnesium aluminium spinels ntawm magnesium aluminium spinels tsim ib lub cev pob txha. Nws muaj peev xwm tiv taus qhov kub thiab txias. Yog li ntawd, qhov hluav taws kub tsis kam thiab load softening kub ntawm magnesium thiab aluminium bricks yog kuj siab. Lub refractory kuj tuaj yeem ncav cuag 2100 ° C, thiab qhov kub ntawm cov paj yog 1570 ° C.
4. Lub thermal expansion thiab thermal stability ntawm magnesium aluminium cib. Vim hais tias cov kab expansion coefficient ntawm magnesium thiab txhuas spinels yog me me, cov kab expansion coefficient ntawm magnesiumaluminium bricks yog heev me me. Hauv qhov ntau ntawm 20? 1000 degree C, txoj kab expansion coefficient ntawm magnesium aluminium bricks tsuas yog 10.6 × 10-6 degree -1. Vim tias magnesium aluminium spinels ua lub luag haujlwm hauv kev txhim kho cov cua sov hauv cov cib, cov cua sov ua haujlwm ntawm magnesium aluminium cib zoo dua, thiab cov dej txias ntau dua 20 npaug.
5. Lub anti-slag kuj ntawm magnesium aluminium cib. Vim lub siab ceev ntawm magnesium thiab txhuas cib thiab cov pores tsawg, Fang Magnesium yog ib puag ncig ntawm magnesium thiab txhuas spinels. Lub peev xwm los tiv thaiv acidity thiab alkaline stab erosion yog qhov muaj zog.
