Top oxygen-blowing combustion system for intermediate frequency furnace

Abstract

The invention relates to a top oxygen-blowing combustion system for an intermediate frequency furnace and belongs to the technical field of the intermediate frequency furnace. A bracket is arranged above a furnace cover of the intermediate frequency furnace; a vertical guide rail and a lifting trolley are mounted on the bracket; the lifting trolley is supported on the vertical guide rail by idler wheels and is capable of moving up and down; an upper chain wheel is mounted at the upper end of the vertical guide rail; a lower chain wheel is mounted at the lower end of the vertical guide rail; the upper chain wheel and the lower chain wheel are in transmission connection through a chain; one end of the chain is connected with the upper part of the lifting trolley while the other end is connected with the lower part of the lifting trolley; an intermediate frequency furnace oxygen combustion gun is fixedly arranged on the lifting trolley; and a gun head of the intermediate frequency furnace oxygen combustion gun is vertically inserted into the intermediate frequency furnace from the top of the furnace cover along the axis of the furnace cover. The furnace oxygen combustion gun is capable of spraying baking flame to preheat metal in the earlier stage and then is capable of spraying cutting flame to cut the metal; after the metal is molten, molten iron is stirred and slagged; lastly, decarbonization is realized; no decarbonizing agent is necessary; the smelting period is greatly shortened; the power consumption of an intermediate frequency power supply is reduced; and the tapping quality is high.

Description

technical field [0001] The invention relates to an intermediate frequency furnace, in particular to an intermediate frequency furnace top type oxygen blowing combustion system. Background technique [0002] The intermediate frequency power supply is a power supply device that converts power frequency 50HZ AC power into intermediate frequency (300HZ to 1000HZ). And the medium-frequency alternating current flowing in the induction coil, generate high-density magnetic force lines in the induction coil, and cut the metal material contained in the induction coil, generate a large eddy current in the metal material for heating, especially suitable for metal smelting , heating and heat treatment conditions. Use the inductor as the primary coil and the metal in the crucible as the secondary coil. When the induction coil is energized with alternating current, alternating magnetic flux is generated. Most of the magnetic flux links the metal charge in the crucible, so an induced pote...

AI Technical Summary

Problems solved by technology

There are the following deficiencies: 1. Since the addition and reaction of the decarburizer requires a long period, and the second and third feeding preparations should be made according to the smelting situation, which seriously affects the smelting cycle

2. The decarburizer is a consumable product. Due to the long cycle, the power consumption increases, which directly increases the smelting cost

3 Since the decarburizer does not have the function of stirring and deslagging of the oxygen burner, it is difficult to control the quality of the finished product

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