| 摘要 |
FIELD: metallurgy.SUBSTANCE: method involves forming of scull on the bottom of a pelletiser, supply of wet charge by two flows, introduction of the first charge flow into the compressed gas flow providing for the generation of gas-wet charge jet, nucleation of the charge by spraying onto the scull by the gas-wet charge jet to obtain a dense layer of wet charge. The said dense wet charge layer is divided into nuclei by longitudinal plate blades, the scull is cleaned from nuclei by a rotating drum with ridges, the pellet shell is formed by extra pelletising of the said nuclei by second flow charge to obtain pellets. The section of the dense charge layer of constant thickness is formed so that the thickness is equal to 0.7-0.8 of the layer diameter, it is done by the separation of the upper curvilinear part of the layer from the whole dense layer with the help of a profiling separator set above the charge scull with a gap. The remaining border parts of the dense layer are destructed by inclined plate blades. Through holes are provided in the plate blades, ridges and the separator.EFFECT: improved strength and uniformity of structural properties of pellets.2 dwg, 1 tbl |
