Method for preparing metallic titanium

A technology of metal titanium and titanium slag, applied in the field of metallurgy, can solve problems such as high equipment requirements, serious problems, and corrosion of electrolytic cells

Inactive Publication Date: 2010-12-15
PANZHIHUA IRON AND STEEL +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the temperature of this method is too high (the electrolysis temperature is greater than 1700°C). Under this condition, the liquid in the molten pool corrodes the electrolytic cell quite seriously, and the high temperature and corrosion resistance of the electrolytic cell must also be considered, which requires relatively high equipment.

Method used

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preparation example Construction

[0014] The method for preparing metallic titanium of the present invention may comprise the following steps:

[0015] (a) When using titanium concentrate to smelt titanium slag, directly add excess carbon-containing reducing agent to generate titanium carbide, or directly add excess carbon-containing reducing agent while feeding nitrogen to make titanium slag generate nitrogen during the smelting process Titanium oxide or titanium carbonitride;

[0016] (b) In a molten salt containing low-valent chlorides of titanium, use the generated titanium carbide, titanium nitride or titanium carbonitride as a soluble anode, and use a metal material as a cathode to perform molten salt electrolysis to obtain metal titanium powder .

[0017] In step (a), the amount of carbon is theoretically TiO 2 1 to 1.5 times the sum of carbon reduced to titanium carbide or carbon nitride or titanium carbonitride and carbon reduced to impurities.

[0018] In step (b), the prepared titanium carbide or...

Embodiment 1

[0022] Weigh 300 grams of TiO 2 Titanium concentrate with a content of 40%, the other components are: 40.98% FeO, 5.42% Fe 2 o 3 , 5.99% MgO, 2.67% CaO, 2.56% SiO 2 , 1.33% Al 2 o 3 , 1.05% MnO. Weigh 82.65 grams of carbon-containing reductant with a fixed carbon content of 94.56% according to the stoichiometric ratio as follows:

[0023] FeO+C=Fe+CO

[0024] Fe 2 o 3 +3C=2Fe+3CO

[0025] TiO 2 +3C=TiC+2CO

[0026] Mix it evenly, put it in a graphite crucible, put it into a vacuum reaction furnace for thermal reduction, heat reduction at a temperature of 1500°C for 5 hours, separate the iron block in the lower layer from the slag phase in the upper layer, and send the slag phase in the upper layer to Sample analysis, through X-ray diffraction phase analysis shows that the main phase of the reduction product is TiC, with the reduction product as the anode, with the carbon steel rod as the cathode, in 4kg KCl-NaCl-TiCl 2 Perform electrolysis in molten salt (the melti...

Embodiment 2

[0028] Weigh 300 grams of TiO 2 Titanium concentrate with a content of 60.33%, other components are: 25.87% FeO, 5.41% Fe 2 o 3 , 1.67% MgO, 2.55% CaO, 0.87% SiO 2 , 1.36% Al 2 o 3 , 1.94% MnO. Weigh 147.4 grams of carbon-containing reducing agent with a fixed carbon content of 94.56% according to the stoichiometric ratio as follows:

[0029] FeO+C=Fe+CO

[0030] Fe 2 o 3 +3C=2Fe+3CO

[0031] TiO 2 +3C=TiC+2CO

[0032] Mix it evenly, put it in a graphite crucible, put it into a vacuum reaction furnace for reaction, heat reduction at a temperature of 1600°C for 7 hours, analyze the iron block and slag phase, send samples to analyze the slag phase, and conduct X-ray diffraction The phase analysis shows that the main phase of the reduction product is TiC, and the reduction product is used as the anode, and the molybdenum rod is used as the cathode. In 5kgMgCl 2 -NaCl-TiCl 3 Perform electrolysis in molten salt (the melting temperature of molten salt is about 485°C), the...

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Abstract

The invention provides a method for preparing metallic titanium. The method comprises the following steps of: in the process of melting titanium slag by using titanium concentrate, directly adding excessive carbon-containing reducing agents to obtain titanium carbide or introducing nitrogen while directly adding the excessive carbon-containing reducing agents to prepare titanium nitride or titanium carbonitride in the melting process of the titanium slag; electrolyzing molten salts containing low-valence chloride of titanium to obtain metallic titanium powder by taking the prepared titanium carbide, the titanium nitride or the titanium carbonitride as a soluble anode and a metal material as a cathode; in addition, further electrolyzing and refining products obtained in the later period of the electrolysis to obtain high-purity titanium. The method has the advantages of simple process, low raw material cost, low energy consumption, small investment in permanent assets and the like. In addition, the prepared metallic titanium has high purity and ferrotitanium can be prepared by further electrolyzing residual anode titanium powder remained by the anode.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for directly utilizing titanium concentrate to produce metallic titanium. Background technique [0002] Titanium is a new type of structural material with advantages such as low density, high specific strength and good corrosion resistance. Among structural metals, the reserves of titanium in the earth's crust rank fourth, second only to iron, aluminum and magnesium. However, in the current world metal production, titanium production is very small, mainly because it is currently extracted from ore. The high cost of titanium limits the application of titanium in various industries. Because the extraction cost of titanium metal is too high, it is only used in some very important fields, such as aerospace, electronics industry, precision instrument manufacturing and so on. With the emergence of various new refining methods, titanium metal has been regarded as a very promising me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/28
Inventor 穆宏波穆天柱弓丽霞邓斌
Owner PANZHIHUA IRON AND STEEL
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