The Experimental Study of Molten Blast Slag Dry Granulation

Abstract

Based on the comprehensive experimental test-bed of blast furnace slag waste heat recovery, we study the impacts which are caused by the changes of the key parameters, such as blast furnace slag discharged temperature, the speed of the granulation device, on the particle diameter distribution and sphericity, so as to master the best operating parameters of the blast furnace slag dry granulation, and provide experimental basic materials for blast furnace slag waste heat recovery. The results show that: when the discharged temperature of the blast furnace slag is controlled in 1400°C～1450°C, and the speed of the granulation device is controlled above 2000r/min, the sphericity is better, and 80% of the particle’s diameter will be 2～5mm.

Influence of Crystallization Behavior of Gas Quenching Blast Furnace Slag on the Preparation of Amorphous Slag Beads

“…The hot water produced in the process is a low-quality heat source. Moreover, the water slag must be dried to be used as cement admixture, which will consume part of the energy and produce harmful gases such as H 2 S and SO 2 which pollute the environment [4][5][6]. Therefore, the dry granulation process has attracted more and more attention from iron and steel industry for how it can overcome the shortcomings of the water quenching method [7,8].…”

Flight Dynamics and Sensible Heat Recovery of Granulated Blast Furnace Slag

“…The object of slag granulation is to obtain the sensible heat of granulated blast furnace slag. Either packed bed or moving bed [14][15][16][17], for dry granulation method, air is the normal heat exchange medium. So the factors influencing heat recovery rate and their contribution are of great concern for the heat recovery process.…”