Research of vibrocast corundum periclase granular masses structural and rheological properties depending on type and quantity of dispersing additives
For melting of heatresistant alloys in induction furnaces high refractory vibroсast crucibles are used. Their technology was developed and implemented in JSC “URIR named after A. S. Berezhnoy”. For manufacturing of high refractory corundum periclase crucibles fused corundum and periclase, alumina, and ADS1 + ADW1 dispersing additive are used, wherein moisture of vibrocast mass is 4.5—4.6 % and their flowability is 80 %. Along with ADS1 + ADW1 additive it is possible to use Castament FS 10 + Castament FW 10 dispersing additive which provides almost the same moisture of masses. Also a new dispersant Castament FS 65 was developed. Therefore researches of Castament FS 65 dispersing additive influence on the structural and rheological properties of vibrocast corundum periclase granular masses in order to establish the possibility of further reducing their moisture is relevant. Influence of dispersing additive Castament FS 65 in the quantity of 0.05; 0.1; 0.2 and 0.3 % on flowability of corundum periclase mass in comparison with influence of optimal quantity (0.2 %) dispersing additive Castament FS 10 + FW 10 (in the ratio 3:1) was studied. Castament FS 65 additive optimal quantity, which significantly increases flowability of mass in comparison to Castament FS 10 + FW 10 additive and can provide decreasing mass moisture from 4.0—4.5 % to 3.5—4.0 % was found as 0.2 %.