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Magnesium preparing process with molten state carbothermy and magnesium smelting system

A carbon-thermal, molten-state technology, applied in the direction of improving process efficiency and reducing gas emissions, can solve problems such as high energy consumption, high cost, and long reduction cycle, and achieve the goals of increasing reaction rate, complete reaction, and reducing gas phase pressure Effect

Inactive Publication Date: 2018-01-05
狄保法
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the shortcomings and deficiencies existing in the existing silicon thermal magnesium smelting production and research, and solving the shortcomings of the traditional silicon thermal magnesium smelting such as long reduction period, high energy consumption and high cost, the present invention provides a low-cost, high energy-consumption Low cost, high production efficiency, continuous production, and green environmental protection molten carbon thermal magnesium production process and its magnesium smelting system

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  • Magnesium preparing process with molten state carbothermy and magnesium smelting system

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Effect test

Embodiment 1

[0044] A molten carbothermic process for producing magnesium, the specific operation steps are as follows:

[0045] Step (1): In the vacuum reactor, the pig iron is metered into the vacuum reactor according to the capacity and ratio of the vacuum reactor to melt it into molten iron, and keep it at around 1200°C-1650°C for use;

[0046] Step (2): Use a vacuum device to maintain the absolute pressure of the vacuum reactor at 40-10000 Pa;

[0047] Step (3): Fill the vacuum reactor with argon gas, and heat the vacuum reactor at the same time, so that the molten iron is boiled, the temperature is maintained at 1200-1650°C, and the entire vacuum reactor is filled with argon;

[0048] Step (4): The carbon powder and magnesium oxide powder are continuously fed into the molten iron surface in the vacuum reactor in the form of a gas-solid mixture under the protection of an appropriate amount of argon, and the reduction reaction is carried out in the molten iron to produce magnesium Steam and ca...

Embodiment 2

[0053] A molten carbothermic process for producing magnesium, the specific operation steps are as follows:

[0054] Step (1): In the vacuum reactor, the pig iron is metered into the vacuum reactor according to the capacity and ratio of the vacuum reactor to melt it into molten iron, and keep it at around 1200°C-1650°C for use;

[0055] Step (2): Use a vacuum device to maintain the absolute pressure of the vacuum reactor at 40-100 Pa;

[0056] Step (3): Fill the vacuum reaction furnace with nitrogen while heating the vacuum reaction furnace to make the molten iron boil, keep the temperature at 1200-1650°C, and fill the entire vacuum reaction furnace with nitrogen;

[0057] Step (4): The carbon powder and magnesium oxide powder are continuously fed into the molten iron surface in the vacuum reactor in the form of a gas-solid mixture under the protection of an appropriate amount of nitrogen, and the reduction reaction is carried out in the molten iron to generate magnesium vapor And carb...

Embodiment 3

[0062] A molten carbothermic process for producing magnesium, the specific operation steps are as follows:

[0063] Step (1): In the vacuum reactor, the pig iron is metered into the vacuum reactor according to the capacity and ratio of the vacuum reactor to melt it into molten iron, and keep it at around 1200°C-1650°C for use;

[0064] Step (2): Use a vacuum device to maintain the absolute pressure of the vacuum reactor at 40-100 Pa;

[0065] Step (3): Fill the vacuum reaction furnace with helium gas, and heat the vacuum reaction furnace at the same time, so that the molten iron is boiled, the temperature is maintained at 1200-1650°C, and the entire vacuum induction furnace is filled with nitrogen;

[0066] Step (4): The carbon powder and magnesium oxide powder are continuously fed into the molten iron surface in the vacuum reaction furnace in the form of a gas-solid mixture under the protection of an appropriate amount of helium, and the reduction reaction is carried out in the molten...

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Abstract

The invention belongs to the technical field of non-ferrous metal metallurgy, and particularly relates to a magnesium preparing process with molten state carbothermy and a magnesium smelting system. The magnesium preparing process with the molten state carbothermy comprises the steps that melted iron is prepared by melting, vacuumizing is conducted, and protection gas is filled; under protection of the right amount of argon, carbon powders and magnesia powders are continuously fed to the position below the liquid level of the melted iron in a vacuum reaction furnace in the form of gas-solid mixture, reduction reaction is conducted in the molten iron, and magnesium vapor and carbon monoxide are generated; gas is fed into a cooling device and cooled, and liquid magnesium is obtained; and theremaining gas is separated, the protection gas is recycled, and the carbon monoxide enters a gas collecting device and can be burned for generating electricity. The magnesium smelting system comprises a vacuum reaction system and a condensation collecting system which are sequentially connected. According to the magnesium preparing process with the molten state carbothermy and the magnesium smelting system, reduction reaction of the carbon powders and the magnesia powders only needs 10 seconds, the recovery rate of magnesium is greater than or equal to 90%, the purity of magnesium is greaterthan or equal to 90%, the melted iron is recycled, and continuous production is realized.

Description

Technical field [0001] The invention belongs to the technical field of non-ferrous metal metallurgy, and specifically relates to a molten carbothermic magnesium production process and a magnesium smelting system. Background technique [0002] Magnesium is an extremely rich metal element in the earth, accounting for about 2.1%-2.7% of the total mass of the earth. my country has the largest reserves of magnesium resources in the world. At present, tens of billions of tons have been proven. Magnesium and magnesium alloys have small specific gravity, high strength, good shock absorption, impact resistance, good machinability, good thermal conductivity, recyclability, less environmental pollution, excellent environmental advantages and performance advantages, and a wide range of applications. It is a rare metal that can be recycled. Vigorously developing the magnesium industry has obvious resource advantages and market advantages in my country and the world. [0003] There are two ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B26/22C22B5/10
CPCC22B5/10C22B26/22Y02P10/122Y02P10/20
Inventor 狄保法樊道卿狄凌飞
Owner 狄保法
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