Nyob ib ncig ntawm 1975, magnesia spinel cib pib siv rau hauv cov cement kiln. Nyiv yog thawj lub teb chaws siv magnesia spinel cib hauv cov cement kilns los daws cov teeb meem chrome los ntawm magnesia-chrome cib. Lub magnesia spinel cib tsis tsuas yog muaj thermal shock stability, tab sis kuj chemically reacts nrog cov cement clinker, tsim ib zaj duab xis tiv thaiv nyob rau saum npoo ntawm magnesia spinel cib, uas tuaj yeem tiv thaiv cov kua theem ntawm diffusing rau hauv magnesia spinel cib. Yog li ntawd, lub tev tawm ntawm magnesia spinel cib yog zoo dua li ntawm magnesia chrome cib.
Txawm hais tias magnesia-chrome cib tuaj yeem hloov tau los ntawm magnesia spinel cib hauv cov cement rotary kilns rau qee yam, tseem muaj qee qhov teeb meem hauv magnesia spinel cib:
(1) Lub peev xwm los dai ntawm daim tawv nqaij tsis muaj zog, thiab cov cib refractory yuav raug mob hnyav heev, yog li txo cov sij hawm thov ntawm lub cev cib;
(2) Thaum tshav kub kub poob ntawm lub cement kiln lub cev yog nce, lub tshav kub noj yog nce, thiab cov khoom yog nkim;
(3) Nyob rau hauv lub xeev kub kub, lub melting point tsis tshua muaj mineral theem yog generated nyob rau hauv lub magnesia spinel cib, thiab cov magnesia spinel cib yog yooj yim raug rau cov tshuaj erosion hnyav thiab ces puas.
(4) Magnesium spinel cib tuaj yeem yooj yim nkag mus rau cov tshuaj tiv thaiv dej. Yog li ntawd, txhawm rau ua kom lub sijhawm ua haujlwm ntev ntawm cov cib refractory, nws tuaj yeem txhim kho los ntawm ob qho tib si ntawm dai kiln ntawm daim tawv nqaij kev ua tau zoo thiab kev ua haujlwm los tiv thaiv.
Ntawm lawv, txoj kev txhim kho magnesia spinel cib suav nrog cov kev ntsuas hauv qab no:
a. Ntxiv cov additives rau magnesium spinel, xws li: TiO2, Fe2O3, ZrO2, thiab lwm yam. Cov additives yog heev pab tau rau lub sintering ntawm cov ntaub ntawv, qhov txo ntawm pom porosity, txhim kho cov tshuaj corrosion kuj, thiab txhim kho cov tawv nqaij kiln. peev xwm;
b. Tsim nyog txo cov ntsiab lus ntawm magnesium spinel, thiaj li muaj micro-cracks hauv lub cib, yog li txo cov thermal conductivity thiab txhim kho tev tsis kam;
c. Txoj kev tshawb nrhiav pom tias thaum cov ntsiab lus alumina hauv cov cib refractory tsawg dua 10 feem pua, cov tawv nqaij ua haujlwm ntawm cov cib zoo dua, yog li los ntawm kev txo cov ntsiab lus ntawm alumina hauv magnesia spinel cib, qhov cub tawv nqaij muaj peev xwm ntawm cov khoom zoo tuaj.
Nyob rau hauv daim ntawv thov ntawm cov cement rotary kilns, magnesia spinel cib nrog lub zog siab, zoo thermal shock stability thiab muaj zog tshuaj yaig kuj yog tsuas yog siv nyob rau hauv lub Upper thiab qis hloov chaw ntawm cement rotary kilns thiab thermal kilns uas yuav tsum tau kub kuj thiab thermal shock kuj. . cov khoom siv rauv.
