PREPARING METHOD FOR TITANIUM OF Ti-C-S ANODE BY CARBONIZED/SULFURIZED ILMENITE

Patent metadata

Field	Value
Publication number	US-2020378020-A1
Application number	US-201916619892-A
Country	US
Kind code	A1
Filing date	Feb 28, 2019
Priority date	Nov 16, 2018
Publication date	Dec 3, 2020
Grant date	—

Abstract

Provided is a method for preparing metallic titanium by anode-electrolysis of carbonized/sulfurized ilmenite, and relates to the technical field of mineral processing and electrochemical extraction of metallic titanium in molten salts in non-ferrous metallurgy. The method uses titanium-containing ore, carbon (C) and sulfur (S) as raw materials and prepares a Ti—C—S/titanium sulfide anode material with high electric conductivity through a sintering reaction, and then uses the Ti—C—S/titanium sulfide anode to prepare metallic titanium in a molten salt electrolyte system successfully. With the Ti—C—S composite soluble anode in the present invention, metallic titanium is deposited at the cathode and CS2/S2 gas is generated at the anode in the molten salt electrolysis process; in addition, the gas can be used as a raw material to effectively treat the ore to prepare titanium sulfide.

First claim

1 . A method for preparing metallic titanium by anode-electrolysis of carbonized/sulfurized ilmenite, wherein, comprising the following steps:
S1: sulfurizing a mixture comprising a titanium-containing material, a carbon-containing reducer and a sulfur reducer to prepare titanium sulfide; S2: using the titanium sulfide and titanium carbide as raw materials to prepare a Ti—C—S composite; S3: using the titanium sulfide or the Ti—C—S composite as an anode, and using electrochemical electrolysis to extract metallic titanium at the cathode; S4: collecting CS 2 and S 2 gasses generated by the anode during the electrolysis and using them for sulfurizing the titanium-containing material.

2 . The method for preparing metallic titanium by anode-electrolysis of carbonized/sulfurized ilmenite according to claim 1 , wherein, the mixture is specifically a mixture obtained by homogenously mixing the titanium-containing material, the carbon-containing reducer, and the sulfur reducer at a molar ratio of 1:2.0:2.0-1:2.5:3.0.

3 . The method for preparing metallic titanium by anode-electrolysis of carbonized/sulfurized ilmenite according to claim 1 , wherein, the conditions of the sulfurization reaction in the step S1 include: burning reaction shielded by an inert atmosphere, temperature range in the reaction is 700° C.-1,600° C., and reaction time range is 30 min.-900 min.

4 . The method for preparing metallic titanium by anode-electrolysis of carbonized/sulfurized ilmenite according to claim 1 , wherein, in the step S2, the titanium sulfide and the titanium carbide are vacuum-sintered to prepare the Ti—C—S composite.

5 . The method for preparing metallic titanium by anode-electrolysis of carbonized/sulfurized ilmenite according to claim 1 , wherein, during the electrolysis in the step S3, the electrolysis temperature is 70° C.-1,600° C., the spacing between the cathode and the anode is 1 cm-50 cm, the voltage range of the electrolytic cell is 0.5V-10.0V, the anode current density range is 0.05 A/cm 2 -1.50 A/cm 2 , and the cathode current density range is 0.05 A/cm 2 -1.50 A/cm 2 , respectively.

6 . The method for preparing metallic titanium by anode-electrolysis of carbonized/sulfurized ilmenite according to claim 1 , wherein, the electrolyte used in the electrolysis in the step S 3 is a salt mixture composed of one or more of CsCl 2 , CaCl 2 , LiCl, NaCl, KCl, MgCl 2 , AlCl 3 , CaF, NaF, KF, and LiF and one or more of TiCl 3 , TiCl 2 , K 2 TiF 6 , and Na 2 TiF 6 .

7 . The method for preparing metallic titanium by anode-electrolysis of carbonized/sulfurized ilmenite according to claim 6 , wherein, the mass percent of titanium ions in the electrolyte is 1%-10%.

8 . The method for preparing metallic titanium by anode-electrolysis of carbonized/sulfurized ilmenite according to claim 1 , wherein, the titanium-containing material is one or more of titanium dioxide, anatase type titanium white, titanium concentrate, titanium nitride, titanium carbide, titanium-carbon oxides, titanium-carbon-nitrogen oxides, metatitanic acid, ilmenite, vanadium titano-magnetite, blast furnace type high titanium slag, high titanium slag and titanium suboxides.

9 . The method for preparing metallic titanium by anode-electrolysis of carbonized/sulfurized ilmenite according to claim 1 , wherein, the carbon-containing reducer is one or more of carbon, activated carbon, graphite powder, charcoal, petroleum coke, bitumen, and coal char particles.

10 . The method for preparing metallic titanium by anode-electrolysis of carbonized/sulfurized ilmenite according to claim 1 , wherein, the cathode is one or more of metallic titanium, stainless steel, carbon steel, metallic molybdenum and metallic nickel.

Assignees

• Univ Beijing Science & Technology

Inventors

• Jiao Shuqiang
• Tian Donghua
• Jiao Handong

Classifications

• Y02P10/20

  Recycling · CPC title

• C25C7/025

  used in cells for the electrolysis of melts · CPC title

• C25C3/28 Primary

  of titanium · CPC title

• B22F2999/00

  Aspects linked to processes or compositions used in powder metallurgy · CPC title

• B22F9/20

  starting from solid metal compounds · CPC title