A kind of method for rapid continuous magnesium smelting

一种炼镁、快速的技术，应用在有色金属冶金领域，能够解决还原罐寿命短、还原周期长、生产成本高等问题，达到降低设备投资及操作成本、原料利用率提高、设备要求低的效果

Active Publication Date: 2015-12-30
LIAONING DONGYU MAGNESIUM RES TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the shortcomings and deficiencies existing in the existing thermal magnesium smelting production and research, and solving the shortcomings of traditional silicon thermal magnesium smelting such as long reduction period, high energy consumption, short life of the reduction tank and high production cost, the present invention provides a The method of rapid and continuous magnesium smelting, that is, high-temperature reduction is carried out in a flowing inert gas, and the high-temperature magnesium vapor generated at the same time is immediately carried away by the flowing inert carrier gas, and condensed to obtain metallic magnesium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The method for rapid continuous magnesium smelting specifically comprises the following steps:

[0061] Step 1: Pellet the ingredients

[0062] Ingredients: dolomite: 75Si-Fe alloy: fluorite according to the mass ratio of 110: 10: 3.0 ingredients, add 1.0% of the total mass of the above three materials water glass as a binder and 5.0% of the total mass of the three materials water;

[0063] Pelletizing: Mix the ingredients evenly, use a disc pelletizer to pelletize to obtain pellets with a particle size of 5-20mm, and dry the pellets naturally for 24 hours;

[0064] Step 2: Calcination of pellets

[0065] Put the air-dried pellets in a high-temperature furnace to raise the temperature to 200°C, keep it warm for 45 minutes to dehydrate, then raise the temperature to 1050°C under an argon atmosphere, keep it warm and calcined for 30 minutes;

[0066] Step 3: Continuous high-temperature reduction of calcined pellets

[0067] The calcined high-temperature pellets are co...

Embodiment 2

[0071] The method for rapid continuous magnesium smelting specifically comprises the following steps:

[0072] Step 1: Pellet the ingredients

[0073] Ingredients: dolomite: 75Si-Fe alloy: fluorite according to the mass ratio of 110: 12: 3.5 ingredients, add 1.5% water glass of the total mass of the above three materials as a binder and 5.0% of the total mass of the three materials water;

[0074] Pelletizing: Mix the ingredients evenly, use a disc pelletizer to pelletize to obtain pellets with a particle size of 5-20mm, and dry the pellets naturally for 24 hours;

[0075] Step 2: Calcination of pellets

[0076] Put the air-dried pellets in a rotary kiln to raise the temperature to 200°C, keep it warm for 45 minutes to dehydrate, then raise the temperature to 1000°C in a high-purity nitrogen atmosphere, keep it warm and calcined for 60 minutes;

[0077] Step 3: Continuous high-temperature reduction of calcined pellets

[0078] The calcined high-temperature pellets are cont...

Embodiment 3

[0082] The method for rapid continuous magnesium smelting specifically comprises the following steps:

[0083] Step 1: Pellet the ingredients

[0084] Ingredients: Dolomite: 75Si-Fe alloy: fluorite is batched according to the mass ratio of 110: 12: 4.0, adding 2.0% of the total mass of the above three materials as water glass as a binder and 4.0% of the total mass of the three materials water;

[0085] Pelletizing: Mix the ingredients evenly, use a disc pelletizing machine to pelletize, and obtain pellets with a particle size of 5-20 mm, and dry the pellets naturally for 12 hours;

[0086] Step 2: Calcination of pellets

[0087] The air-dried pellets were placed in a fluidized bed and heated to 250°C, kept for 30 minutes for dehydration, then heated to 950°C in a high-purity nitrogen atmosphere, and kept for calcination for 70 minutes;

[0088] Step 3: Continuous high-temperature reduction of calcined pellets

[0089] The calcined high-temperature pellets are continuously ...

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Abstract

The invention discloses a method for rapidly and continuously smelting magnesium, which belongs to the technical field of nonferrous metal metallurgy. The method of the present invention includes the steps of directly making pellets, calcining pellets, high-temperature reduction of calcined pellets in a flowing argon atmosphere, and condensation of high-temperature magnesium vapor: mixing dolomite or magnesite with reducing agent and fluorite in proportion , mixed evenly to form pellets, and the resulting pellets were calcined under a nitrogen or argon atmosphere; secondly, the calcined high-temperature pellets were brought into the reduction furnace under the protection of argon without cooling, and were High-temperature reduction reaction is carried out to obtain high-temperature magnesium vapor; finally, the high-temperature magnesium vapor is taken out of the high-temperature reduction furnace through argon flow for condensation to obtain metal magnesium. The invention adopts "relative vacuum" means, cancels the vacuum system and the vacuum reduction tank, realizes the rapid and continuous production of metal magnesium, shortens the reduction time to less than 90 minutes, and increases the recovery rate of magnesium by more than 88%.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal metallurgy, in particular to a method for rapid and continuous magnesium smelting. Background technique [0002] In the 1950s, magnesium began to enter the civilian market. Since the 1960s, due to the application of magnesium in the civil market and space technology, the development of the magnesium industry has been promoted, the magnesium smelting method and production technology have also made great breakthroughs, and the economic benefits have continued to increase. There are two main types of magnesium smelting methods in the world: electrolysis and thermal reduction. The thermal reduction method uses calcined dolomite as the raw material and ferrosilicon as the reducing agent to obtain magnesium metal through reduction under high temperature and vacuum conditions. The most important of these is the Pidgeon method for smelting magnesium. Due to the simple process and greatly reduce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B26/22C22B5/04C22B5/16C22B1/243C22B1/16
CPCC22B1/2406C22B1/2413C22B1/243C22B5/04C22B5/16C22B26/22C22B1/16
Inventor 张廷安豆志河张子木刘燕吕国志赫冀成
Owner LIAONING DONGYU MAGNESIUM RES TECH CO LTD
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