An installation for the production of slag pumice gravel from liquid blast furnace slags was manufactured and assembled at Karaganda Metallurgical Works in 1992, and since then it has been in trial-and-commercial operation. The installation consists of a vibrating charging chute I, two vibrating porosers 2 and 3, a blade cylinder 4, and a conveyor with a screen 5 (Fig. 1).The melt arrives at the slag-processing site in ladles 6 of capacity 16 m 3 that are transported to the installation by a locomotive. The ladle is positioned at the center of the vibrating charging chute, which is simultaneously connected to a discharge system. Before the ladle starts to turn over, the vibrating chute, the porosers, the belt conveyors, and the blade cylinder are switched on and water for cooling is supl~lied.As the ladle is titled the melt is slowly (1 -1.2 tonlmin) discharged into the charging unit and then to the vibrating porosers, where it is treated with process water, bloats, and Karaganda Metallurgical Works; Karaganda Polytechnic Institute, Karaganda, Kazakstan.
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