Dab tsi yog qhov tsis zoo ntawm cov dej-raws li refractory cement?
Lub tsevrefractory bricksyuav tsum tau refractory cement ntawm tib cov khoom. Refractory castable cement kuj tau teeb tsa nrog cov qib sib txawv ntawm cov av nkos refractory raws li qib sib txawv ntawm cov cib refractory. Piv txwv li, thaum lub tsevsiab alumina cibthiab av nplaum cib, 5% high-aluminium cement thiab refractory av nplaum cement yog npaj.
1. General refractory cement yog npaj nrog dej
Feem ntau, refractory av nplaum yog npaj nrog dej. Qhov feem pua ntawm cov dej ntxiv yog nyob nruab nrab ntawm 25-30%, nyob ntawm qhov kev tsim kho ntawm qhov chaw. Yog hais tias qhov kub ntawm cov refractory bricks siv nyob rau hauv lub qhov cub hauv ob sab phlu tshaj 1350 degree, high-qib refractory bricks yuav tsum tau, thiab cov refractory cement yuav tsum muaj zog plasticity los sau cov qhov khoob ntawm refractory bricks thiab txhim khu lub zog thiab lub neej ntawm cov khoom.
2. Qhov tsis zoo ntawm refractory cement npaj nrog dej
Qhov tsis zoo ntawm refractory castable cement npaj nrog dej yog tias nws lub zog thiab adhesion tsis zoo li cov uas tau npaj nrog phosphoric acid. Refractory cement npaj nrog dej tuaj yeem ua rau cib poob. Lub zog nyob rau hauv lub xeev txias yog tsawg thiab tsis tuaj yeem ua ke sai sai nrog cov pob zeb refractory npaj. Lub sijhawm teeb tsa kuj tsis zoo li ntawm phosphoric acid khi refractory av nplaum.
Refractory cement modulated nrog phosphoric acid muaj zog adhesion thiab zoo zog. Nws tuaj yeem ua kom muaj zog nrog cov cib refractory hauv cov masonry thaum kub nce. Thiab thaum nws ua ke nrog cov cib refractory, cov cib yuav tsis poob thaum sib txuas nrog cov cib refractory.
3. Cov qauv txiav txim rau cov cement refractory
Cov txheej txheem rau kev txiav tximrefractory castablecement yog lub zog sib txuas ntawm cov cement refractory thiab masonry refractory cib, uas muaj lub zog txaus txawm tias qhov kev pabcuam kub siab tshaj 1350 degree. Muaj ntau hom refractory av nkos sib tov, nrog rau cov iav dej, phosphoric acid, CMC thiab lwm yam khoom siv khi. Lub refractory cement npaj nrog dej iav daws tsim silica gel, uas yog tsim rau siv nrog acidic refractory cib.
Cov av nkos refractory siv nrog lub teeb yuag refractory cib kuj yog cov khoom siv tib yam. Lub refractory castable cement siv nrog av nplaum cib thiab lub teeb yuag av nplaum cib yog tib yam. Kuj ua kom muaj zog thiab adhesion. Yog hais tias nws yog alumina cib uas muaj cov ntsiab lus txhuas siab tshaj 60%, high-aluminium refractory cement yuav tsum tau siv. Refractory bricks ua los ntawm corundum yuav tsum tau nruab nrog corundum refractory cement.
Cov av nkos refractory npaj los ntawm kev ntxiv dej tsis muaj dej iav lossis phosphoric acid. Nws solidifies sai sai thiab tsis thicken tom qab 12 teev cia. Txawm li cas los xij, yog tias cov av nkos refractory npaj los ntawm dej tsis khaws cia ntev, yuav muaj dej saum toj thiab av nkos hauv qab. Hluav taws kub av nplaum npaj nrog dej iav los yog phosphoric acid aqueous tov muaj fluidity zoo thiab muaj zog sib txuas lub zog.
Nyob rau hauv luv luv, tsis muaj teeb meem dab tsi ntawm refractory cement yog siv, nws yuav tsum tau txiav txim raws li cov refractory bricks siv thiab kub. Refractory av nkos npaj nrog dej los yog refractory av nkos nrog rau lwm yam binders kuj raug xaiv raws li tej yam kev mob.
