STUDIES ON SOME ZIRCON-ALUMINA REFRACTORIES

Abstract

In Eg ypt , the glass and metallurgical indu s tries s till need some t y pes of refrac t o ri es whi c h a re co mpletel y im port ed a nd a re ve r y expe n s i ve . A m o n g th ese re f rac t o ri es a r e Z ir co n­ a lumin a o nes w hi c h are u sed witho ut co mpetiti o n 1n buildin g g la ss t a nks and in the recentl y de vel oped hi g h ca pacit y s teel ladl es ( > 100 ton s). The s elected technique u sed 1n the p repa rati o n of t h e z ir c o n -a lumin a ref rac tor ies u n de r i n ves t ­ i gat i o n. was the sinter in g o ne w hi c h i s less ex pe n sive t h a n the fu s ion-cas t one. It i s believed th a t the exi sting f ac iliti es in the E gy pti a n refr ac t ories pl ant can provide mos t of th e tec hn ol og­ i cal require m e nts fo r the manuf ac ture of t he pl a nned produ ced r ef ra c tori es.

The research program wa s pl a nned to deal with the foll o wi n g in v es t i g ati o nal lin es:

CHAPTER 1: Reaction Sintering of Some A lumina-Zircon

Mixtures

Discussion of the Previous Studies on Al2 0 3- Z r 0 2- S i 0 2

S y stem

At the beg innin g of thi s work , the pre v i o u s in ves t iga ti o n s o n A l 2 0 3 -Zr0 2- S i02 system we re coll ec ted a nd st u di ed. It was o b ser ved th a t a lth ou g h refr ac t o ri es in this s y stem a re w i del y u sed , n o co m ple te s tud y was ca rri ed out o n this sys te m . So m e limited d a ta were also collec ted f r o m othe r wo rks.