Preheating type alloy baking device

Abstract

The invention discloses a preheating type alloy baking device, belongs to the field of steelmaking equipment, and relates to an alloy baking technology. The preheating type alloy baking device comprises a gas preheating mechanism, an alloy baking mechanism and a tail gas recovery mechanism; the gas preheating mechanism comprises a coal gas preheating cavity, an air preheating cavity, a coal gas conveying pipeline connected with the coal gas preheating cavity and an air conveying pipeline connected with the air preheating cavity, the alloy baking mechanism comprises a combustion chamber, an igniter arranged in the combustion chamber and a preheating bin arranged above the combustion chamber, and the tail gas recovery mechanism comprises a recovery cover, a tail gas conveying pipe communicating with the recovery cover, and a plate heat exchanger communicating with the tail gas conveying pipe; and the coal gas preheating cavity and the air preheating cavity wrap the outer wall of the preheating bin, the combustion chamber is connected with the coal gas conveying pipeline and the air conveying pipeline, and the recovery cover is arranged on the upper portion of the preheating bin. Thepreheating type alloy baking device can preheat an alloy efficiently and comprehensively, has the advantages of energy conservation and emission reduction, and is simple in structure and convenient tooperate.

Description

technical field [0001] The invention belongs to the field of steelmaking equipment and relates to alloy baking technology, in particular to a preheating type alloy baking device. Background technique [0002] Whether it is converter steelmaking or electric furnace electric steel, in order to deoxidize the molten steel or make the steel have certain characteristics and meet certain requirements, alloys are usually added to the steel to quickly and efficiently meet the smelting requirements. [0003] At present, if the cold alloy is directly put into the furnace and the ladle, the following three problems will occur. 1. The alloy is easy to be damp during storage, and it is easy to add H to the steel, and the billet is easy to produce "white spots", making the steel brittle; 2. After the cold alloy is added, it will absorb a lot of heat, which makes the converter or electric furnace need to increase the tapping temperature to compensate for the temperature drop of alloying, wh...

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Problems solved by technology

[0003] At present, if the cold alloy is directly put into the furnace and the ladle, the following three problems will occur. 1. The alloy is easy to be damp during storage, and it is easy to add H to the steel, and the billet is easy to produce "white spots", making the steel brittle; 2. After the cold alloy is added, it will absorb a lot of heat, which makes the converter or electric furnace need to increase the tapping temperature to compensate for the temperature drop of alloying, which not only deteriorates the quality of molten steel, but also increases the smelting pressure; Splashing occurs, causing iron loss and increasing the risk of operation

The current alloy roaster is almost unable to control the temperature of the outer wall of the roaster, which greatly reduces the life of the roaster

Secondly, there is no treatment for the exhaust gas after combustion, and no real energy saving and emission reduction can be achieved. The baking of the alloy is only the alloy on the surface of the silo, and it is impossible to effectively preheat the alloy inside the silo.

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