METHOD DRAINAGE CAPACITY smelting from the main part liquid metal through an outlet in the bottom surface of the tanks, smelting CAPACITY FOR ITS IMPLEMENTATION AND SEQUENCE OF MAJOR OPERATIONS OF ITS IMPLEMENTATION

摘要

The invention relates to the production of metal in rough and non-ferrous metallurgy and is illustrated by the example of steel production in electric arc furnaces. In the method, before the emptying of the tank starts, the level of the metal inlet to the outlet is raised and this position is maintained until the tank is empty, and then the initial position of the level of this inlet is restored, while the flows of the outgoing metal are separated from the metal flows rising to the entrance to the outlet, the value which determines the amount of rise in the level of metal inlet to the outlet. The method affects the chemical composition of liquid metal by supplying alloying elements to the metal flows leaving the tank, which is carried out together with the supply of a neutral or inert gas. A preliminary pumping of these gases through the metal located above the outlet and in the gaps for the passage of metal is provided prior to release. The metal-smelting vessel for implementing the method of emptying contains a rod with the possibility of its vertical movement, up to the output outside the vessel (upward movement) and to the bottom surface of the vessel (downward movement). The rod is located opposite the outlet and at the bottom ends with a glass-like cavity in which a extension having a through hole is rigidly fixed on the jumpers. The extension extends beyond the rod, the height of this protrusion along with the height of the extension and the thickness of the slag layer determine the amount of metal left in the tank. The rod has a central hole for the supply of alloying elements and a neutral or