FURNACE FOR THE PRODUCTION OF FERROCHROMIUM ALLOYS Russian patent published in 2022 - IPC F27D3/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to a furnace for the production of ferrochromium alloys. The furnace contains a hearth, side walls lined with refractory material, a steel casing, an inner bath formed by the hearth and side walls, in which molten ferrochromium alloy is accumulated, three electrodes made of graphite to form an electric arc and installed in the inner bath with the ability to move in a vertical direction, the location of which relative to the center in the horizontal plane forms an equilateral triangle, two tap holes of circular cross section: one tap hole is used to release the molten ferrochromium alloy, and the other tap hole is used to release slag, while the tap hole for tapping the ferrochromium alloy is below the tap hole for tapping slag, have a cross-sectional diameter in the range from 60 mm to 65 mm, located at different heights on the side wall of the furnace in a vertical plane relative to a common axis at a distance between them, calculated by the formula, rotated relative to each other at an angle of 60°, while the tap hole for the exit of the ferrochromium alloy is located at a distance of 70 mm to 100 mm above bottom surface, the diameter of the inner bath sequentially increases along the height of the furnace from the surface of the hearth to the top of the furnace, based on the specific power per furnace load volume, and the electrodes are separated from each other by 1/10 of the diameter of the action zone and create three electric arc burning zones, in addition, the furnace contains a water-cooling structure , made of metal with high thermal conductivity, which is a system of hollow pipes, folded in the form of sections, through which water is passed under pressure, having an annular shape and enveloping the steel casing of the furnace.

EFFECT: expansion of the arsenal of designs of electric arc furnaces, used, in particular, for the production of ferrochromium alloys, which are used for the production of alloys alloyed with chromium, is provided.

9 cl, 6 dwg