Method for treating titanium-containing feedstock

Patent metadata

Field	Value
Publication number	US-2016016812-A1
Application number	US-201414429588-A
Country	US
Kind code	A1
Filing date	Mar 6, 2014
Priority date	Mar 6, 2013
Publication date	Jan 21, 2016
Grant date	—

Abstract

A method for producing titanium tetrachloride is provided, in which valuable materials such as unreacted titanium-containing raw material, carbon raw material and chlorine can be recovered from solid recovered material generated in chlorinating process of titanium-containing raw material, and titanium-containing raw material can be efficiently used. The treatment method of titanium-containing raw material includes the steps: separating and removing impurities selectively from the titanium-containing raw material as chlorides so as to obtain high titanium-containing raw material, producing titanium tetrachloride using the high titanium-containing raw material, and performing separating process of impurities from solid recovered material byproduced in the production of titanium tetrachloride, together with selective chlorinating treatment of the titanium-containing raw material. Thus, the high titanium-containing raw material can be produced while recovering chlorine and impure oxides.

First claim

1 . A treatment method for titanium-containing raw material, comprising steps of:
separating and removing impurities selectively from the titanium-containing raw material as chlorides (hereinafter referred to as “selective chlorinating treatment”), producing titanium tetrachloride using a high titanium-containing raw material produced in the selective chlorinating treatment, and performing separating processing of impurities from solid recovered material byproduced in the production of titanium tetrachloride, together with the selective chlorinating treatment of the titanium-containing raw material.

2 . The treatment method for titanium-containing raw material according to claim 1 , wherein the titanium-containing raw material is titanium slag which is obtained by carbon reduction of ilmenite ore, ilmenite ore, or anatase ore.

3 . The treatment method for titanium-containing raw material according to claim 1 , wherein the solid recovered material byproduced during the production of titanium tetrachloride using the high titanium-containing raw material is a mixture containing unreacted raw materials and impure chlorides discharged from the chlorinating furnace.

4 . The treatment method for titanium-containing raw material according to claim 1 , wherein before performing the selective chlorinating treatment of a mixture in which the titanium-containing raw material is added to the solid recovered material byproduced during the production of titanium tetrachloride using the high titanium-containing raw material, the impure chlorides in the solid recovered material are vaporized and removed by heating the mixture together.

5 . The treatment method for titanium-containing raw material according to claim 1 , wherein chlorine is reacted with the mixture containing the solid recovered material in which impure chlorides are already vaporized and removed and unreacted raw materials are present, so that other impurities in the solid recovered material are separated and removed as chlorides.

6 . The treatment method for titanium-containing raw material according to claim 1 , wherein the impure chlorides separated and removed by the method are oxidized so that impure oxides are recovered.

7 . The treatment method for titanium-containing raw material according to claim 1 , wherein in a step immediately after the solid recovered material is obtained, at least a part of the material is treated by one of the following processes:
1) the solid recovered material is granulated and supplied to a chlorinating furnace; 2) the solid recovered material is used as a valuable material; 3) an oxidizing agent is added to the solid recovered material so as to generate heat, and the heat is used as a heat source of a heating process; 4) the solid recovered material is reacted with chlorine so that titanium in a titanium ore contained in the solid material is recovered as titanium tetrachloride.

8 . The treatment method for titanium-containing raw material according to claim 1 , wherein the chlorine recovered by the method is reused as a chlorine source for a selective chlorinating treatment for production of titanium tetrachloride using high titanium-containing raw material by reacting the recovered chlorine with the mixture containing the solid recovered material in which impure chlorides are already vaporized and removed and unreacted raw materials are present, so that other impurities in the solid recovered material are separated and removed as chlorides.

9 . The treatment method for titanium-containing raw material according to claim 1 , wherein the content amount of titanium dioxide in the high titanium-containing raw material is 92 weight % or more.

Assignees

• Toho Titanium Co Ltd

Inventors

• Horikawa Matsuhide
• Fukasawa Eiichi

Classifications

• B09B3/70

  Chemical treatment, e.g. pH adjustment or oxidation (involving an extraction step B09B3/80) · CPC title

• B09B3/00

  Destroying solid waste or transforming solid waste into something useful or harmless · CPC title

• C01G23/024 Primary

  Purification of tetrachloride · CPC title

• C01B7/035

  Preparation of hydrogen chloride from chlorides · CPC title

• C01G49/10

  Halides {(C01G49/0018 takes precedence)} · CPC title