National Slag Limited

Robert P Cotsworth

Peter A MacKenzie

Michael Orlander

Apparatus for the pelletization of heat liquifiable materials, such as metallurgical slags consists of a downwardly-extending feed plate onto which the molten material is fed together with water, if required to promote the expansion of the molten material and for control of the cooling. The material discharges from the feed plate onto a rotating radially vaned drum by rotor by which it is projected into the air for simultaneous cooling and pelletization after it has first passed through a flow control gap formed between the feed plate surface and the periphery of a second rotor mounted above the feed plate. The second rotor is rotated in the direction such that it promotes the flow of the molten material down the plate, forcing the material between the vanes of the projecting rotor, while at the same time spreading the material across the width of the plate against its natural tendency to form a compact stream. The flow of the material is thereby made more uniform, providing for more effective use of the projecting rotor and avoiding localized flooding of the vanes with consequent loss of pelletization. The resulting apparatus can also be more compact for a given output. In some circumstances the second rotor can with advantage be rotated against the direction of flow down the feed plate.

Apparatus for the pelletization of heat-liquifiable solid materials

Apparatus for the pelletization of heat-liquifiable materials, such as metallurgical slags, consists of feed means for the molten material, these feed means depositing the material on a downwardly-extending feed plate over which it flows while it is mixed with water, if water is necessary to promote the expansion of the molten material and for control of the cooling. The material then flows on to a first rotating radially-vaned drum or rotor by which it is projected into the air for simultaneous cooling and pelletization. The feed means comprises flow control means such that any flow greater than a predetermined maximum is fed onto a second feed plate disposed above the first, from which the excess molten material flows on to a second rotating radially-vaned drum or rotor operative in like manner to the first. The flow control means may comprise for example a dam over which the excess material flows. Preferably both of the feed plates are mounted to vibrate and are vibrated by a rotating eccentric weight to reduce adhering of the material to the feed surface plate by thus reducing the heating thereof.

Growing community of inventors

Hamilton, Canada

Robert P Cotsworth