Vacuum argon-oxygen refining equipment, method for smelting low-carbon and ultra-low-carbon stainless steel and for smelting low-carbon ferrochrome and micro-carbon ferrochrome by applying same

An argon-oxygen refining and vacuum technology, which is applied in the fields of metallurgy and steelmaking, can solve the problems of increasing smelting cost and production loss, occupying a large area of ​​the smelting furnace, and consuming smelting time, so as to save converter time and shorten the smelting cycle. , the effect of simple structure

Pending Publication Date: 2021-01-05
山西索尔科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This method requires molten iron to go through two smelting processes. The smelting furnace body occupies a large area, the equipment is expensive, and it takes smelting time, which increases smelting costs and production losses.

Method used

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  • Vacuum argon-oxygen refining equipment, method for smelting low-carbon and ultra-low-carbon stainless steel and for smelting low-carbon ferrochrome and micro-carbon ferrochrome by applying same
  • Vacuum argon-oxygen refining equipment, method for smelting low-carbon and ultra-low-carbon stainless steel and for smelting low-carbon ferrochrome and micro-carbon ferrochrome by applying same
  • Vacuum argon-oxygen refining equipment, method for smelting low-carbon and ultra-low-carbon stainless steel and for smelting low-carbon ferrochrome and micro-carbon ferrochrome by applying same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] figure 1 It is a schematic structural diagram of the vacuum argon-oxygen refining equipment provided in Embodiment 1 of the present invention; figure 2 It is a top view of the vacuum argon-oxygen refining equipment provided in Embodiment 1 of the present invention; image 3 It is a structural schematic diagram of the vacuum argon-oxygen refining equipment of the present invention during the normal pressure smelting process; Figure 4 It is a structural schematic diagram of the vacuum argon-oxygen refining equipment of the present invention during the vacuum smelting process; as Figure 1 to Figure 4As shown, the vacuum argon-oxygen refining equipment includes: a furnace body 1 and a support ring sleeved on the furnace body 1, and the two sides of the support ring are symmetrically provided with a driving end trunnion 2 and a driven end trunnion 3; The furnace body 1 is provided with: a normal pressure feeding port 4, a top blowing gun 5, a bottom blowing gun 6 and a ...

Embodiment 2

[0062] On the basis of Embodiment 1, the vacuum argon-oxygen refining equipment, the furnace body 1 includes: a furnace shell 13 and an inner cavity; the inner cavity is a double-layer structure, including a sealed outer layer 11 and a gas-permeable inner layer 12, the Refractory bricks 14 are arranged on the inner wall of the air-permeable inner layer 12 .

[0063] The inner cavity in this embodiment is designed with a double-layer structure, the inner layer is used for ventilation, and the outer layer is used for sealing, which can effectively ensure the vacuum degree inside the furnace body during the vacuum smelting process.

Embodiment 3

[0065] On the basis of Embodiment 1, vacuum argon-oxygen refining equipment, a water-cooling pipe is provided between the furnace shell 13 and the sealed outer layer 11, and a water inlet and a water outlet are provided on the furnace shell 13, and the water-cooling pipes are respectively It is connected with the water inlet and the water outlet, and the water-cooling pipeline is connected with the external water-cooling cycle control system through the water inlet; the water-cooling pipeline can be a serpentine tube structure, a tube structure or other structures.

[0066] The water-cooled pipeline in this embodiment can keep the furnace body 1 under the protection of the water-cooled pipeline all the time during smelting, prevent the furnace body from being overheated and deformed, and affect the vacuum degree in the furnace, and can also effectively prolong the service life of the furnace body 1 .

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Abstract

The invention provides vacuum argon-oxygen refining equipment and a method for smelting low-carbon and ultra-low-carbon stainless steel and for smelting low-carbon ferrochrome and micro-carbon ferrochrome by applying the vacuum argon-oxygen refining equipment. The vacuum argon-oxygen refining equipment comprises a furnace body and a backing ring sleeved on the furnace body, a driving end trunnionand a driven end trunnion are arranged on the two sides of the backing ring, a normal-pressure feeding hole, a top blowing gun, a bottom blowing gun and a sealing cover are arranged on the furnace body, a normal-pressure feeding device adds auxiliary materials into the furnace body through the normal-pressure feeding hole, the top blowing gun and the sealing cover are movably arranged above the furnace body, a vacuum feeding device is arranged on the sealing cover, in the vacuum smelting state, the sealing cover moves to the position above the furnace body, a sealed space is formed by the sealing cover and the furnace body, and a vacuumizing device communicates with the sealed space through a driven end of the driven end trunnion and sucks gas in the sealed space. The vacuum argon-oxygen refining equipment and the method have the advantages of being small in occupied area, short in smelting period and low in production cost, and is suitable for the technical field of metallurgy and steelmaking.

Description

technical field [0001] The invention relates to the technical field of metallurgy and steelmaking, in particular to vacuum argon-oxygen refining equipment, a method for smelting low-carbon and ultra-low-carbon stainless steel and low-microcarbon ferrochrome using the same. Background technique [0002] Under the current production conditions, the smelting of low-carbon and ultra-low-carbon stainless steel and ferroalloys (such as micro-carbon ferrochrome) requires molten iron to be smelted once in the AOD furnace to complete oxidation decarburization, slag removal, and reduction. The molten iron enters the VOD furnace for secondary refining, and completes the secondary decarburization in a vacuum environment, so that the carbon content in the molten iron reaches the standard of low-carbon or micro-carbon stainless steel and ferroalloy products. [0003] This method requires molten iron to go through two smelting processes, and its smelting furnace occupies a large area, expe...

Claims

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Application Information

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IPC IPC(8): C21C7/10C21C7/068C21C7/072
CPCC21C7/068C21C7/0685C21C7/072C21C7/10
Inventor 桑金钊桑县明
Owner 山西索尔科技有限公司
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