| 摘要 |
<p>The invention relates to a tubular briquette made of ferrous wastes as powder and smalls, meant to be used in the ferrous metallurgy, in reduction equipments, such as in pig-iron furnaces or in installations for the direct iron reduction from ores, with a view to obtaining iron sponge. According to the invention, the briquette () is tube-shaped, having an external diameter D = 60...70 mm, an internal diameter d = 20...25 mm, the height h = 40...45 mm and having an external cylindrical surface (), an internal cylindrical surface (), two flat surfaces () equal to each other, a cavity (), and is obtained by the compression of a mixture in a mould, using a hydraulic press, the mixture comprising 40...60% steel foundry dust, 8...12% blast-furnace dust, 8...12% blast-furnace agglomeration slag, 5...9% iron scale, 5...8% coal dust, 5...8% the ferrous fraction of the steel foundry slag, 3...5% graphite, 2...4% bentonite, 2...4% lime and 4...8% water.</p> |
