Method for production of metallic titanium and metallic titanium obtained with the method

Abstract

A method for production of metallic titanium and metallic titanium obtained with the method are provided. The method for production of metallic titanium comprises: taking a titaniferous material as the anode, a metal material as the cathode, and a molten salt material as the electrolyte, and carrying out electrolysis under electrolytic conditions to obtain metallic titanium; wherein, the titaniferous material is in a porous structure, with 1 mm˜10 mm average pore diameter and 20%˜60% porosity, and at least a part of the titanium element in the titaniferous material exists in the form of TiO x , wherein, 2>x>0. With the method provided in the present invention, the process is simplified, and the yield ratio and purity of the obtained metallic titanium are higher.

1 . A method for production of metallic titanium, comprising: taking a titaniferous material as the anode, a metal material as the cathode, and a molten salt material as the electrolyte, and carrying out electrolysis under electrolytic conditions to obtain metallic titanium; wherein, the titaniferous material is in a porous structure, with 1 mm˜10 mm average pore diameter and 20%˜60% porosity, and at least a part of the titanium element in the titaniferous material exists in the form of TiO x , wherein, 2>x>0. 
     
     
         2 . The method according to  claim 1 , wherein, the average pore diameter of the titaniferous material is 3mm˜7mm, and the porosity is 40%˜60%. 
     
     
         3 . The method according to  claim 1 , wherein, the content of said TiOx in the titaniferous material is not lower than 45 wt. %. 
     
     
         4 . The method according to  claim 1 , wherein, the titaniferous material is obtained with a method that comprises the following steps:
 (1) contacting a molten titanium oxide-containing raw material with a carbonaceous reducing agent such that the titanium oxide in the titanium oxide-containing raw material is fully or partially reduced to said TiO x , to obtain molten titanium slag that contains the reduction product of said TiO x ;   (2) cooling the molten titanium slag that contains the reduction product of said TiOx obtained in step (1) to be shaped.   
     
     
         5 . The method according to  claim 4 , wherein, the cooling is conducted in the pressure of 0.9×10 5 ˜1.2×10 5  Pa. 
     
     
         6 . The method according to  claim 4 , wherein, the cooling is conducted in the cooling rate of 100˜150° C./h. 
     
     
         7 . The method according to  claim 4 , wherein, in step (1), the contacting is conducted in the temperature of 1,650˜2,000° C., the pressure of −100 Pa˜100 Pa, and the time of 2˜10 h; calculated in titanium oxide, the mol ratio of titanic compounds in the titanium oxide-containing raw material to carbon in the carbonaceous reducing agent is 1:1˜3. 
     
     
         8 . The method according to  claim 4 , wherein, in step (1), the titanium oxide-containing raw material is composed of titanium concentrates and/or titaniferous slag; the carbonaceous reducing agent is one or more selected from the group consisting of blind coal, soft coal, wood charcoal, coke, and refinery coke. 
     
     
         9 . The method according to  claim 1 , wherein, the metal material for cathode is one or more selected from the group consisting of carbon steel, molybdenum, copper, and nickel; the molten salt is molten alkali chloride and/or alkaline earth metal chloride. 
     
     
         10 . The method according to  claim 1 , wherein, the electrolysis conditions include anode current density of 0.05˜2 A/cm 2 , and cathode current density of 0.05˜2 A/cm 2 , and temperature of electrolysis of 600˜900° C. 
     
     
         11 . Metallic titanium obtained with the method according to  claim 1 . 
     
     
         12 . A method for production of metallic titanium, comprising the following steps:
 (1) contacting a molten titanium oxide-containing raw material with a carbonaceous reducing agent such that the titanium oxide in the titanium oxide-containing raw material is fully or partially reduced to TiOx, wherein, 2>x>0, to obtain molten titanium slag that contains the reduction product of said TiOx;   (2) cooling the molten titanium slag that contains the reduction product of said TiOx obtained in step (1) to be shaped to obtain a titaniferous material, the cooling is conducted such that the average pore diameter of the titaniferous material is 1 mm˜10 mm and the porosity is 20%˜60%;   (3) taking the titaniferous material obtained in step (2) as the anode, a metal material as the cathode, and a molten salt material as the electrolyte, and carrying out electrolysis under electrolytic conditions, to obtain metallic titanium.   
     
     
         13 . The method according to  claim 12 , wherein, the cooling is conducted in the pressure of 0.9×10 5 ˜1.2×10 5  Pa. 
     
     
         14 . The method according to  claim 12 , wherein, the cooling is conducted in the cooling rate of 100˜150° C./h. 
     
     
         15 . The method according to  claim 12 , wherein, in step (1), the contacting is conducted in the temperature of 1,650˜2,000° C., the pressure of −100 Pa˜100 Pa, and the time of 2˜10 h. 
     
     
         16 . The method according to  claim 12 , wherein, in step (1), calculated in titanium oxide, the mol ratio of titanic compounds in the titanium oxide-containing raw material to carbon in the carbonaceous reducing agent is 1:1˜3. 
     
     
         17 . The method according to  claim 12 , wherein, in step (1), the titanium oxide-containing raw material is composed of titanium concentrates and/or titaniferous slag; the carbonaceous reducing agent is one or more selected from the group consisting of blind coal, soft coal, wood charcoal, coke, and refinery coke. 
     
     
         18 . The method according to  claim 12 , wherein, the metal material for cathode is one or more selected from the group consisting of carbon steel, molybdenum, copper, and nickel; the molten salt is molten alkali chloride and/or alkaline earth metal chloride. 
     
     
         19 . The method according to  claim 12 , wherein, the electrolysis conditions include anode current density of 0.05˜2 A/cm 2 , and cathode current density of 0.05˜2 A/cm 2 , and temperature of electrolysis of 600×900° C. 
     
     
         20 . Metallic titanium obtained with the method according to  claim 12 .