SU439192A1 - Metal and alloy gas electroslag remelting furnace - Google Patents

Description

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The invention relates to the field of metallurgy and, in particular, to the field of smelting iron in machine-building plants.

A furnace of gas-and-slag iron casting is known, in which the hearth is made conductive and has a lined electrode fed by an electric current from a single phase. At a distance from the bottom, exceeding the size of the Internal diameter of the furnace, there are two electrodes installed around the perimeter, supplied from the other two phases. The shaft of the furnace to the upper electrodes is filled with co-x-ray such that IKOKC covers the upper electrodes by the size of two diameters. Above the upper electrodes at a distance greater than two diameters of the electrodes (software 1peri; meter burners are installed. The metal melts in the leak as follows.

The furnace shaft is filled with coke above the upper electrodes. A voltage is applied to the electrodes. Due to the fact that ko; kc I | O is electrically conductive, when an electric current flows through it, it heats up and serves as a SOURCE of heat to induce slag. After heating the coke, slag components are loaded onto it, which melt and form a liquid bath together with the coke. After slag induction, gas burners are turned on.

heat and metal melting. On top of the kakso-slag bath, the charge is charged, which is heated and melted from the heat of the gas plume, and the metal in the form of droplets drains onto the hearth. In the slag bath, the metal is refined and (it overheats to the required temperature. The refined metal accumulates on the hearth, periodically it is released through the tap hole.

However, such a furnace does not allow the process of refining of one interruption in one, such as, for example, desulfurization, dephosphorization and the raising of the metal with silicon, which degrades the quality of the metal.

In order to increase (the quality of the metal and to ensure the continuity of the process; the process van of the proposed furnace is made of three or more chambers installed stepwise in series and connected with each other siphon channels.

The drawing shows the described furnace gas-electroslag remelting of metals or alloys.

The furnace contains a casing /, the lower electrode 2, the upper electrode 3, gas burners 4, the charge 5, slag 6 in the first bath, coke 7, molten metal or alloy 8, slag 9 in the second bath, slag W in the third bath, metal tap. //, lined casing 1 of the furnace with refractory bricks 12, transitional