Tapping and smoke exhausting system of rotary submerged arc furnace

Abstract

The invention belongs to the technical field of submerged arc furnace smoke exhaust equipment, and particularly discloses a rotary type submerged arc furnace tapping smoke exhaust system. The system comprises a chute exhaust fume collecting hood, an annular flow baffle, an annular flue and a plurality of exhaust fume hoods, the chute exhaust fume collecting hood comprises an exhaust fume collecting port and an exhaust fume outlet, the exhaust fume collecting port is fixedly connected above an iron outlet of the submerged arc furnace, and the exhaust fume outlet is fixedly connected with an annular flow baffle; the annular flow baffle surrounds the periphery of the submerged arc furnace and rotates along with the submerged arc furnace together with the chute exhaust fume collecting hood; an annular flue is fixedly arranged on the periphery of the annular flow baffle, a plurality of smoke exhaust hoods are fixedly arranged on the outer side wall of the annular flue at intervals, and the smoke exhaust hoods communicate with smoke exhaust branch pipes of the dust removal system. Smoke collected by the chute smoke collecting hood penetrates through the annular flow baffle to enter the annular flue, and finally enters the smoke exhaust branch pipes through the smoke exhaust hood at the corresponding position to reach a dust removal system. The problems of tapping and smoke exhaust of the rotary submerged arc furnace can be solved, the smoke collection effect of the tap hole is improved, and the power loss of the smoke exhaust fan is reduced.

Description

technical field [0001] The invention belongs to the technical field of smoke exhaust equipment for submerged arc furnaces, and in particular relates to a rotary type submerged arc furnace iron tapping smoke exhaust system. Background technique [0002] Submerged arc furnace, also known as electric arc furnace or electric resistance furnace, is mainly used for reducing and smelting raw materials such as ore, carbonaceous reducing agent and solvent. The submerged arc furnace will generate a large amount of dust-containing flue gas during the iron smelting and tapping process, especially when the furnace hole is opened and blocked, the furnace gas is prone to splashing, and high-concentration dust-containing flue gas will be generated in a short time. If it is not collected in time Purification will cause great pollution to the environment. In addition, the flue gas from the tap hole has the characteristics of periodicity and large instantaneous flue gas volume. Tests show tha...

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Problems solved by technology

[0005] (1) The position of the tap hole of the traditional fixed submerged arc furnace is fixed, so the fixed tap exhaust system cannot solve the problem that the tap hole of the rotary electric furnace is not fixed; because the position of the tap hole of the rotary submerged arc furnace varies with the ore The hot furnace rotates and changes, so it is impossible to use the traditional fixed fume collecting hood and flue for centralized tapping and dust collection, which makes it difficult to collect the flue gas of the rotary rotary submerged arc furnace;

[0006] (2) Conventional tapping flue gas collection adopts a large fume hood, which is installed above the tap hole. The distance between the fume hood and the tap hole is too large, resulting in poor flue gas collection effect during the tapping process; and the traditional fixed submerged arc furnace The flue gas flow direction cannot be changed by the fume hood. Due to changes in the furnace conditions, the flue gas volume during the tapping fume exhaust process varies. When the power of the fume exhaust fan is constant, once the flue gas splashes at the tap hole, Because the flue gas flow rate is too fast, even if the fan is fully turned on, the purpose of completely collecting smoke and dust cannot be achieved, which will cause part of the flue gas to be discharged disorderly and pollute the environment;

[0007] (3) Since a large amount of cold air enters the process of collecting flue gas in the conventional large fume hood, the total amount of flue gas that needs to be discharged increases significantly, and the power requirements for the exhaust fan increase accordingly, and the electric power of the fan will increase during operation. In addition, due to the low temperature of the mixed air, the temperature of the flue gas will be greatly reduced, resulting in the condensation and precipitation of saturated moisture in the flue gas in the pipeline and purification links, which will increase the risk of pipeline blockage, filter bag sticking, etc., and affect the normal operation of production

[0008] The above-mentioned problems make it difficult to achieve a good tapping and smoke exhaust effect at the taphole of the rotary submerged arc furnace at present, and there is an urgent need for a tapping and smoke exhaust system with good smoke and dust removal effect and suitable for the rotary submerged arc furnace

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