Apparatus for manufacturing a rapidly cooled solidified gas having rotating cooling drum

An apparatus for manufacturing a rapidly cooled solidified slag, which comprises:

• at least one rotating cooling drum having a peripheral surface, said cooling drum having a horizontal center axis and being cooled by a cooling medium;
• driving means for rotating said cooling drum around said horizontal center axis thereof;
• means defining a slag sump at the rising position of said peripheral surface of said cooling drum, and including means for depositing molten slag onto said peripheral surface of said cooling drum, part of said means defining said slag sump comprising part of said peripheral surface of said cooling drum;
• a scraper provided so as to be in contact with the lower half of said peripheral surface of said cooling drum for peeling off solidified slag from said cooling drum;
• and,
• a slag feeding means, arranged above said cooling drum, for pouring said molten slag into said slag sump;
• whereby said molten slag poured into said slag sump is deposited onto said peripheral surface of said cooling drum, rapidly cooled through heat exchange with said cooling medium according to the rotation of said cooling drum to become a solidified slag, and peeled off from said peripheral surface of said cooling drum by said scraper;
• and
• said peripheral surface of said cooling drum comprises means defining surface irregularities over substantially the entire surface of said peripheral surface, said surface irregularities including at least one of a plurality of grooves formed in said peripheral surface, a plurality of projections on said peripheral surface, a plurality of recesses in said peripheral surface and a surface roughness of said peripheral surface expressed by a maximum height within the range of from 12 to 500 .mu.m.