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Magnesium refining method and titanium sponge preparation method

A technology of sponge titanium and molten magnesium, which is applied in the fields of magnesium refining and sponge titanium preparation, can solve the problems of poor safety, affecting the quality of sponge titanium, and insufficient purity of magnesium raw materials, and achieves the effect of simple operation method.

Inactive Publication Date: 2014-06-25
PANGANG GROUP TITANIUM INDAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The purity of the magnesium raw material obtained by this method is not high enough
In particular, the technical process of refining magnesium using titanium tetrachloride or low-valent titanium chloride is difficult to control and poor in safety. At present, there is no practical application in industrial production in China.
These methods all need to build a separate magnesium refining device. After the magnesium is refined, it is still necessary to use a special container to transport the magnesium to the reduction production sponge titanium device system. During the transportation, the impurities in the transport container may enter the magnesium raw material. Thus affecting the quality of final titanium sponge

Method used

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  • Magnesium refining method and titanium sponge preparation method

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[0024] The present invention also provides a preparation method of titanium sponge, which comprises refining the molten magnesium raw material, and then contacting the refined molten magnesium raw material with titanium tetrachloride under the process conditions for producing sponge titanium by magnestic reduction, Wherein, the method of refining molten magnesium raw material is the refining method of magnesium raw material provided by the present invention.

[0025] The reaction conditions and production steps required for the preparation method of titanium sponge according to the present invention can adopt the conditions and steps for producing titanium sponge by magnesium thermal reduction known in the art. For example, the conditions of the reaction can include: relative to 1 ton of molten magnesium raw material, the feeding rate of titanium tetrachloride is 20-50 kilograms per hour, the consumption of titanium tetrachloride is 2.5-2.8 tons, and the temperature of the cont...

Embodiment 1-5

[0029] Examples 1-5 are used to illustrate the refining method of magnesium provided by the present invention.

[0030] Table 1

[0031]

[0032] The magnesium raw materials are refined according to the conditions listed in Table 1. The specific refining steps are: under an argon atmosphere, 7.5 tons of magnesium raw materials are placed in the reduction device, and the magnesium-containing raw materials in the reduction device are removed by the temperature control system. Raise the temperature to the temperature required for contact, so that the magnesium raw material is in a molten state, and at different temperatures, add titanium tetrachloride to the reduction device, so that the titanium tetrachloride and the magnesium raw material are in contact. After the addition is completed, the magnesium The raw materials are left to stand for a period of time, so that the titanium sponge generated in the contacting process settles to the bottom of the reduction device, and the ...

Embodiment 6-11

[0039] Examples 6-11 are used to illustrate the preparation method of the titanium sponge provided by the present invention.

[0040] table 3

[0041] Numbering

temperature (°C)

TiCl 4 Feeding amount (t)

Example 6

800

20.932

Example 11

720

20.932

Example 7

770

20.960

Example 8

830

20.812

Example 9

750

20.963

Example 10

850

20.625

[0042] Prepare titanium sponge according to the conditions listed in Table 3 respectively, and the specific preparation steps are:

[0043] Utilize respectively the magnesium raw material 6 that obtains in embodiment 1-5 and comparative example 1 to carry out the preparation process of sponge titanium in the reducing device that carries out refining process after standing process finishes, under the same temperature and pressure condition, to reducing device Titanium tetrachloride was added at a rate of 230 kg per hour. Contact reacti...

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Abstract

The invention discloses a magnesium refining method, and the magnesium refining method includes contact of a melted magnesium material and titanium tetrachloride and then standing, and is characterized in that the contact temperature is 750-850 DEG C. The invention also provides a titanium sponge preparation method which is characterized by comprising refining of the melted magnesium material and contact of the refined melted magnesium material with titanium tetrachloride under technical conditions of magnesiothermy reduction production of sponge titanium, and a method for refining of the melted magnesium material is the magnesium refining method provided by the invention. By using the magnesium refining method provided by the invention, high purity magnesium can be obtained, and by using titanium sponge preparation method for production of the sponge titanium, a sponge titanium product with high qualification rate and high grade rate can be obtained.

Description

technical field [0001] The invention relates to a magnesium refining method and a preparation method of sponge titanium. Background technique [0002] Magnesium raw materials used in the industrial production of titanium sponge generally contain impurities such as iron, aluminum, silicon, and manganese. In the process of producing sponge titanium by magnesothermic reduction, the impurities in magnesium raw materials will affect the qualified rate and grade rate of sponge titanium products, so it is generally necessary to refine magnesium before producing sponge titanium by magnesothermic reduction. [0003] Commonly used magnesium refining methods need to be carried out in special magnesium refining furnaces or crucible furnaces. Refining fluxes composed of magnesium chloride, potassium chloride, and calcium chloride are added to magnesium to reduce the impurity content in magnesium through physical and chemical adsorption. This magnesium refining method has a poor effect o...

Claims

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Application Information

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IPC IPC(8): C22B26/22C22B34/12C22B9/10C22B9/02
Inventor 黄子良姜方新杜晓林刘彬王明亮
Owner PANGANG GROUP TITANIUM INDAL
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