Features And Classification Of Basic Refractories

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Information about Features And Classification Of Basic Refractories
Science-Technology
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Published on September 30, 2015

Author: sunriserefractory

Source: authorstream.com

slide 1: F e a t u r e s A n d C l a s s i f i c a t i o n O f B a s i c R e f r a c t o r i e s B a s i c r e f r a c t or i e s a r e t hos e w hi c h a r e a t t a c ke d by a c i d s l a g s but s t a bl e t o a l ka l i ne s l a gs dus t s a nd f um e s a t e l e va t e d t e m pe r a t ur e s . S i nc e t he y do not r e a c t w i t h a l ka l i ne s l a gs t he s e r e f r a c t or i e s a r e of c ons i de r a bl e i m por t a nc e f or f ur na c e l i ni ng s w he r e t he e nvi r onm e nt i s a l ka l i ne . T he m os t i m por t a nt ba s i c r a w m a t e r i a l s a r e M a gne s i a M gO D ol om i t e C a O M gO a nd C hr om i t e . M agn e s i a b r i c k M a gne s i a br i c k i s a ba s i c r e f r a c t or y w i t h m or e t ha n 90 M g O a nd a m a i n c r y s t a l pha s e of pe r i c l a s e . I t i s c ha r a c t e r i z e d by hi g h r e f r a c t or i ne s s g ood a l ka l i r e s i s t a nc e a nd s upe r i or r e f r a c t or i ne s s unde r l oa d a nd i t i s m a i nl y a ppl i e d t o t he r e ge ne r a t or s of g l a s s ki l ns a nd ot he r hi g h t e m pe r a t ur e f ur na c e s . I t c a n g e ne r a l l y be di vi de d i nt o s i nt e r e d m a gne s i a br i c k a nd c he m i c a l l y bound m a gne s i a br i c k. F u s e d M agn e s i a b r i c k slide 2: F us e d M a g ne s i a br i c k i s m a de w i t h f us e d m a g ne s i a by a r e a s ona bl e s i z e di s t r i but i on hi g h pr e s s ur e f or m i ng a nd hi g h- t e m pe r a t ur e s i nt e r i ng . I t ha s s t r ong r e s i s t a nc e t o s l a g c or r os i on a bi l i t y a nd hi g h t e m pe r a t ur e di m e ns i ona l s t a bi l i t y . I t i s m a i nl y a ppl i e d t o t he r e ge ne r a t or s of g l a s s ki l ns a nd ot he r hi g h t e m pe r a t ur e g l a s s f ur na c e s . M agn e s i a A l u m i n a S p i n e l B r i c k I t i s a ki nd of ba s i c r e f r a c t or y w i t h pe r i c l a s e a s m a i n pha s e m a gne s i a a l um i na s pi ne l c l i nke r a s ba s i c m a t e r i a l . I t ha s s uc h c ha r a c t e r i s t i c s a s g ood t e m pe r a t ur e vi br a t i on g ood s t r e ng t h a nd vol um e s t a bi l i t y i n hi g h t e m pe r a t ur e . I t i s w i de l y us e d i n t r a ns i t i on z one of c e m e nt r ot a r y ki l ns g l a s s t a nk r e ge ne r a t or s a nd l i m e ki l ns . M agn e s i a C h r om e B r i c k s slide 3: I t i s m a de w i t h s i nt e r e d m a gne s i a a nd r e f r a c t or y l e ve l c hr om e or e a s r a w m a t e r i a l s . T he s pa c e be t w e e n r e f r a c t or y g r a i ns i s bonde d w i t h s i l i c a t e . T he dom e s t i c s o c a l l e d m a gne s i a – C hr om e br i c ks . T he r e f r a c t or i ne s s of m a gne s i a c hr om e br i c ks a r e m or e t ha n 2000 ℃ a nd t he r e f r a c t or y unde r l oa d i s a bove 1550 ℃ .G ood s t e a dy vol um e i n hi g h t e m pe r a t ur e t he pe r f or m a nc e of m e e t i ng s udde n c ol d a nd s udde n hot i s be t t e r t ha n m a gne s i a br i c ks M agn e s i a C ar b on B r i c k M a gne s i a C a r bon br i c k i s r e s i n- bonde d br i c k m a de f r om de a d- bur ne d or f us e d m a gne s i a a nd g r a phi t e . A nt i - ox i da nt i s a dde d i f r e qui r e d. M a gne s i a C a r bon br i c k ha s g ood pe r f or m a nc e i n t he r m a l r e s i s t a nc e c or r os i on r e s i s t a nc e a nd s pa l l i ng r e s i s t a nc e . W i de l y us e d i n c onve r t e r s E A F s l a dl e s a nd r e f i ni ng f ur na c e s . M agn e s i a Z i r c on i a B r i c k slide 4: T he pr oduc t i s c om pos e d of f us e d m a gne s i a s a nd a nd z i r c on s a nd a nd i t be l ong s t o a l ka l i ne m a t e r i a l . T hi s pr oduc t ha s hi g h de ns i t y of m or e t ha n 3.08g / c m 3. I t a l s o r e s i s t s a l ka l i ne a t m os phe r e e r os i on a nd a l ka l i ne s l a g e r os i on a nd w i de l y us e d i n g l a s s f ur na c e r e ge ne r a t i ve c ha m be r c e m e nt ki l n s t e e l - m a ki ng e l e c t r i c f ur na c e a nd non- f e r r ous m e t a l m e t a l l ur g y . M a g ne s i a Z i r c on B r i c k i s us e d f or r e ge ne r a t or of g l a s s f ur na c e . B a s i c r e f r a c t or i e s ha s s t r ong r e s i s t a nc e t o ba s i c s l a g a nd a l ka l i ne f l ux a t hi g h t e m pe r a t ur e s but c a n r e a c t w i t h t he a c i di c s l a g a c i d f l ux or a c i di c r e f r a c t or i e s . T he y a r e m a i nl y us e d i n ba s i c s t e e l f ur na c e s non- f e r r ous m e t a l f ur na c e s a nd c e m e nt ki l ns . A r t i c l e S our c e : ht t p: / / w w w . f us e da z s .c om / ne w s / 86.ht m l

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