| 摘要 |
<p>The invention relates to a process for producing steel shots by atomization with pressurized air. According to the invention, the process starts by making a steel charge from waste and casting the same at a temperature ranging between 1630...1650°C, in a casting funnel provided at its lower part with a nozzle wherefrom a vein of molten metal with a diameter of 10 mm flows to be guided into an atomization tower where the smelt is disintegrated under the action of the compressed air released by a multi-jet atomization device comprising 12 nose pipes, each of them having a diameter of 1.5 mm, which are circularly arranged so that the angle between the axis of the air jets and the smelting flowing direction is 10°, the flow rate of the compressed air is Qa=0.3...0.4 mm/min, at a pressure P=1...1.5 MPa, and after detachment, the particles get a spherical shape and drop from at least 2500 mm into a tank of cooling water located at the base of the atomization tower, where they are cooled down to a temperature of 50°C, after which they are subjected to a settling operation to eliminate the excess water and the shots are dried in a rotary gas furnace at a temperature of 150°C and then are classified by granulometric fractions.</p> |
