Method for producing smelting flux by using manganese-containing melt

Inactive Publication Date: 2015-12-16
HUNAN UNIV OF SCI & ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the manganese compound used in this process is usually raw manganese ore, which is produced by adding other materials. It consumes about 1,800 degrees of electricity per ton of product, and because the raw manganese ore is used, the harmful components in the smelting and preparation process High, causing serious environmental pollution and greater physical and mental harm to workers, while the product quality is unstable and the yield is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In the traditional blast furnace ironmaking process, the manganese-containing by-product melt samples at the temperature in the blast furnace are collected, and the manganese content is measured to be 18%. 800 kg of the manganese-containing by-product melt (1300°C) produced during the blast furnace smelting process is required, and a diameter of 1.7 The flux furnace with a height of 1.5 meters collects the manganese-containing melt and keeps it warm for 20 minutes, then adds 25 kg of manganese at 40°C to adjust the manganese content of the manganese-containing melt to 21%.

[0035] Then add 100 kg of magnesium at 95°C, 100 kg of silicon at 97°C, and 60 kg of fluorite at 80°C and keep it warm for 2 hours, then raise the temperature of the flux furnace to 1700°C by arc heating, melt for 30 minutes, and finally take off the furnace and quench in water The finished product is obtained; the labor intensity of workers is reduced by two-thirds, and consumable materials are save...

Embodiment 2

[0037] In the process of electric furnace silicon smelting, samples of molten manganese-containing by-products in the blast furnace are collected, and the manganese content is measured to be 20%. 800 kg of manganese-containing by-product melt (1300°C) produced during the blast furnace smelting process is required, and the diameter is 1.7 meters. , The flux furnace with a height of 1.5 meters collects the manganese-containing melt and keeps it warm for 20 minutes, and then adds 25 kg of manganese at 50°C to adjust the manganese content of the manganese-containing melt to 23%.

[0038] Then add 80 kg of magnesium at 98°C, 100 kg of silicon at 97°C, and 70 kg of fluorite at 85°C and keep it warm for 1 hour, then raise the temperature of the flux furnace to 1750°C by arc heating, melt for 30 minutes, and finally take off the furnace and quench in water That is the finished product.

Embodiment 3

[0040] In the process of traditional blast furnace manganese smelting, samples of molten manganese-containing by-products in the blast furnace are collected, and its manganese content is measured to be 25%. 800 kg of manganese-containing by-product melt (1300°C) produced during the blast furnace smelting process is required, and a diameter of 1.7 The flux furnace with a height of 1.5 meters collects the manganese-containing melt and keeps it warm for 20 minutes, then adds 20 kg of manganese at 50°C to adjust the manganese content of the manganese-containing melt to 27%.

[0041] Then add 80 kg of magnesium at 90°C, 100 kg of silicon at 100°C, and 80 kg of fluorite at 75°C and keep it warm for 2 hours, then raise the temperature of the flux furnace to 1600°C by arc heating, melt for 30 minutes, and finally take off the furnace and quench in water That is the finished product.

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PUM

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Abstract

The invention discloses a method for producing a smelting flux by using a manganese-containing melt. The method comprises the following steps: making use of a high-temperature manganese-containing melt generated in a smelting process of a blast furnace or an electric furnace, namely collecting the manganese-containing melt by virtue of foundry ladles, and then pouring into a flux furnace; adding an appropriate amount of manganese, magnesium, silicon and fluorite raw material components; heating to about 1700 DEG C by virtue of the electric furnace to smelt for about 30 minutes; and performing water quenching to prepare the smelting flux. According to the method disclosed by the invention, the consumption of manganese minerals is low, the electricity consumption is low, the production cycle is short, the production efficiency is high, and meanwhile, the emission of harmful gases can be effectively reduced, so that the method is an environment-friendly type flux preparation method; the consumption of heat energy can be effectively reduced, the labor intensity is reduced, the working efficiency is improved, heat pollution, discharge pollution and space occupation of waste residues are avoided, 70% of the production cost is saved, the utilization ratio of the manganese minerals is improved by 8-30%, the emission of waste gases is reduced by 30-60%, the convenience for waste gas treatment is significantly improved, and the waste gas treatment cost is reduced by 60-80%.

Description

technical field [0001] The invention belongs to the field of mineral smelting, in particular to a method for producing smelting flux by utilizing manganese-containing molten liquid produced during production in an electric furnace or a blast furnace. Background technique [0002] In the equipment manufacturing process of machinery manufacturing, petrochemical industry, coal metallurgy, mining, construction, electric power, military industry, aerospace, ocean engineering and other fields, submerged arc automatic welding, semi-automatic welding, electroslag pressure welding and copper welding are widely used And pressure welding of vertical steel bars, etc., when performing the above welding operations, it is necessary to use various fluxes for protection. The flux itself is divided into smelting flux and non-smelting flux, and the traditional production method of smelting flux is usually produced by AC electric melting process. the goal of. [0003] However, the manganese c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C22/00C22C32/00B23K35/40
Inventor 邵金华陈小明刘健夏雄杨宇翔
Owner HUNAN UNIV OF SCI & ENG
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