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Method for preparing metallic titanium with high temperature fused salt electrolysis of titanium dioxide

A technology of titanium dioxide and high-temperature molten salt, which is applied in the field of separation and extraction of metal materials, and can solve problems such as difficulties in industrial application, poor conductivity of titanium dioxide, and low current efficiency

Inactive Publication Date: 2009-01-14
北京宝泰丰金属研究所 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of preparing sponge titanium, the conductivity of titanium dioxide as the cathode is not good. Although the preparation of the cathode has been improved (roasting under a carbon reducing atmosphere), the current efficiency is still not high, and the use of calcium chloride CaCl 2 As an electrolyte, it absorbs water seriously, making it very difficult for industrial applications

Method used

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  • Method for preparing metallic titanium with high temperature fused salt electrolysis of titanium dioxide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The anode electrode is graphite.

[0058] Electrolyte is calcium fluoride CaF 2 .

[0059] The method for preparing metal titanium by molten salt electrolysis of titanium dioxide comprises the following steps:

[0060] The first step: making titanium dioxide spheres

[0061] (A) Titanium dioxide TiO 2 , PVC binder and tap water are added to the pelletizing equipment to produce pellets with a particle size of 60-120mm;

[0062] Dosage: 100g of titanium dioxide TiO 2 Add 8g of binder and 2g of tap water;

[0063] (B) drying the pellets with a particle size of 60 to 120 mm at a temperature of 300° C. for 20 minutes to obtain titanium dioxide spheres;

[0064] The second step: Molten salt electrolysis to produce titanium metal

[0065] (A) adding the titanium dioxide spheres prepared in the (B) step of the first step to the electrolytic cell;

[0066] (B) The electrolyte calcium fluoride CaF 2 Added to the electrolytic cell, the amount of electrolyte added is 2 / 3 o...

Embodiment 2

[0073] The anode electrode is graphite.

[0074] Electrolyte is calcium fluoride CaF 2 A mixed molten salt with lithium fluoride LiF, the content of lithium fluoride LiF in the mixed molten salt is 20% by weight.

[0075] A method for preparing metallic titanium by high-temperature molten salt electrolysis of titanium dioxide comprises the following steps:

[0076] The first step: making titanium dioxide spheres

[0077] (A) Titanium dioxide TiO 2 , Carboxymethyl cellulose calcium binder and tap water are added to the pelletizing equipment to obtain pellets with a particle size of 60-120mm;

[0078] Dosage: 100g of titanium dioxide TiO 2 Add 8g of binder and 3g of tap water;

[0079] (B) drying the pellets with a particle size of 60 to 120 mm at a temperature of 200° C. for 30 minutes to obtain titanium dioxide spheres;

[0080] The second step: Molten salt electrolysis to produce titanium metal

[0081] (A) adding the titanium dioxide spheres prepared in the (B) step o...

Embodiment 3

[0089] The anode electrode is graphite.

[0090] Electrolyte is calcium fluoride CaF 2 A mixed molten salt with lithium fluoride LiF, the weight percent content of lithium fluoride LiF in the mixed molten salt is 5.

[0091] A method for preparing metallic titanium by high-temperature molten salt electrolysis of titanium dioxide comprises the following steps:

[0092] The first step: making titanium dioxide spheres

[0093] (A) Titanium dioxide TiO 2 , PVC binder and tap water are added to the pelletizing equipment to produce pellets with a particle size of 60-120mm;

[0094] Dosage: 100g of titanium dioxide TiO 2 Add 5g of binder and 5g of tap water;

[0095] (B) drying the pellets with a particle size of 60 to 120 mm at a temperature of 150° C. for 60 minutes to obtain titanium dioxide spheres;

[0096] The second step: Molten salt electrolysis to produce titanium metal

[0097] (A) adding the titanium dioxide spheres prepared in the (B) step of the first step to the ...

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Abstract

The invention discloses a metal titanium preparation method from the high temperature salt-melting electrolyzed titanium dioxide. Through adopting sectional electrolysis temperature to remove the trace amount of iron impurity from titanium dioxide in the molten state, the iron impurity with the weight percentage of 1 to 10 contained in the selected raw material is solved, the range of the raw material for preparing metal titanium is widened, and the production cost of the metal titanium is reduced. Chlorides (CaCl2 and LiCl) are not adopted in the electrolyte in the invention, chlorine hydride gas can not be generated during the electrolysis, and therefore no pollution is caused to the environment.

Description

technical field [0001] The invention relates to a method for separating and extracting metal materials, more particularly, a method for preparing metallic titanium by electrolyzing titanium dioxide with molten salt. Background technique [0002] The method commonly used in the world's titanium metal industrial production is the Kroll process, which is the reduction of TiCl by magnesium 4 Preparation of titanium sponge. This process has not changed much since its inception. The process consists of three parts: one is to prepare crude TiCl from titanium-containing minerals 4 ; The second is crude TiCl 4 Refining; the third is the reduction of TiCl by magnesium 4 Production of sponge titanium and vacuum distillation; then sponge titanium needs to be vacuum smelted to obtain dense metal titanium. The Kroll process is discontinuous, and the reaction must be loaded, heated at high temperature, and unloaded during the production process, which not only requires high energy con...

Claims

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Application Information

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IPC IPC(8): C25C3/28
Inventor 卢惠民贾文成
Owner 北京宝泰丰金属研究所
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