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Technology for united producing rare earth calcium magnesium silicon iron alloy by mining hot furnace middle frequency induced electric furnace hot liquid

A technology of induction electric furnace and submerged arc furnace, which is applied in the field of smelting rare earth calcium magnesium ferrosilicon alloy, which can solve the problems of reducing the economic benefits of enterprises, failing to meet the requirements of magnesium pressing temperature, increasing magnesium ingot and power consumption, and achieving good product consistency. , stable quality and reduced segregation

Inactive Publication Date: 2006-09-13
郭成会
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For products containing RE and Ca higher than 2%, due to the limitation of the submerged arc furnace smelting process, it is necessary to supplement the rare earth alloy and silicon-calcium alloy before the magnesium pressing process, which will reduce the temperature of the alloy melt and fail to reach the pressure. Due to the temperature requirements of magnesium, it is difficult to ensure the stability of alloy product quality, and it is easy to cause serious segregation in alloy ingots, resulting in waste products, increased magnesium ingots and power consumption, increased product manufacturing costs, and reduced economic benefits of enterprises

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Using 3200KVA submerged arc furnace and 0.5T medium frequency induction furnace to jointly produce Mg5.8-2.8-2 rare earth calcium magnesium ferrosilicon alloy products.

[0009] Product main component requirements: Mg5.5-5.9%, Ca2.7-2.9%, RE2.0-2.2%, Si44.0-48.0%, Al≤1.0%, Fe balance.

[0010] Smelting process

[0011] 1. Mix 1.1T of silica, 0.024T of rare earth concentrate, 0.68T of coke, and 0.55T of steel shavings according to the weight ratio, and continuously add them into the submerged arc furnace, control the voltage at 80-90V, and control the current at 24000-26000A , The furnace temperature is controlled at 1500-1600 ° C, after about 100 minutes of smelting, it is ready to be released.

[0012] 2. After energizing the submerged arc furnace for about 20 minutes, mix 50kg of rare earth alloy, 90kg of silicon-calcium alloy, and 20kg of ferrosilicon alloy into the medium-frequency induction furnace, and adjust the power to 180KW for smelting. During the melting p...

Embodiment 2

[0017] A 3200KVA submerged arc furnace and a 0.5T intermediate frequency induction furnace are used to jointly produce Mg5.3-2-2 rare earth ferrosilicon alloy products.

[0018] Main component requirements of the product: Mg5.1-5.5%, Ca2.0-2.5%, RE2.0-2.2%, Si44.0-48.0%, Al≤1.0%, Fe balance.

[0019] Smelting process

[0020] 1. Mix 1.1T of silica, 0.024T of rare earth concentrate, 0.68T of coke, and 0.55T of steel shavings according to the weight ratio, and continuously add them into the submerged arc furnace, control the voltage at 80-90V, and control the current at 24000-26000A , The furnace temperature is controlled at 1500-1600 ° C, after about 100 minutes of smelting, it is ready to be released.

[0021] 2. After energizing the submerged arc furnace for about 20 minutes, mix 76kg of rare earth alloy, 56kg of silicon-calcium alloy, and 68kg of silicon-ferrosilicon alloy into the medium-frequency induction furnace, and adjust the power to 180KW for smelting. During the m...

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Abstract

The technics of producing RE CaMgSiFe alloy with thermal liquid of mining thermal furnace-intermediate frequency induction electric furnace, whose main character is before the working procedure of pressing magnesium, melting charge in mining thermal furnace and melting RE SiCa alloy in intermediate frequency induction electric furnace separately in order to guarantee the temperature request to alloy solution when pressing magnesium. The tapping temperature of mining thermal furnace should be controlled between 1500deg.C and 1600deg.C; the tapping temperature of intermediate frequency induction electric furnace should be controlled between 1600deg.C and 1700deg.C; firstly, adding the alloy solution in mining thermal furnace into magnesium pressing package, secondly, adding the RE SiCa alloy in intermediate frequency induction electric furnace into magnesium pressing package according to 10-30% of liquid alloy weight in mining thermal furnace, finally, pressing in magnesium ingot according to pressing magnesium technics, obtaining RE CaMgSiFe alloy after reaction finishing.

Description

technical field [0001] The invention belongs to a process for smelting rare earth calcium magnesium ferrosilicon alloy, and in particular relates to a smelting process for coproducing rare earth calcium magnesium ferrosilicon alloy with submerged arc furnace-intermediate frequency induction electric furnace hydrothermal fluid co-production. Background technique [0002] Rare earth calcium magnesium ferrosilicon alloy is one of the new nodularizers for the manufacture of ductile iron products. At present, the methods of producing rare earth-containing spheroidizers mainly include direct remelting of magnesium in an intermediate frequency induction furnace and the method of first producing rare earth ferrosilicon alloys in an electric arc furnace, and then pressing magnesium outside the furnace. In recent years, there is also a process of directly producing rare earth calcium-magnesium-silicon-iron alloys using submerged arc furnace "one-step method". Compared with the previou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04C22B4/06
Inventor 郭成会
Owner 郭成会