Method for treating titanium-containing feedstock

Patent metadata

Field	Value
Publication number	US-9656879-B2
Application number	US-201414429588-A
Country	US
Kind code	B2
Filing date	Mar 6, 2014
Priority date	Mar 6, 2013
Publication date	May 23, 2017
Grant date	May 23, 2017

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

The invention claimed is:

1. A treatment method for titanium-containing raw material, comprising steps of:
a first chlorinating process comprising producing titanium tetrachloride from a first titanium-containing raw material, wherein the first titanium-containing raw material is a high titanium-containing raw material, and wherein the first chlorinating process produces a byproduced material;
recovering the byproduced material as a solid;
a second chlorinating process comprising exposing a second titanium-containing raw material to chlorine in the presence of the recovered solid byproduced material, the second titanium-containing raw material comprising impure metals; and
separating impure metals selectively chlorinated during exposure of the second titanium-containing raw material to chlorine in the presence of the recovered solid byproduced material from the second titanium-containing raw material.

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

3. The treatment method for titanium-containing raw material according to claim 1 , wherein the recovered solid byproduced material comprises: unreacted raw carbon, ore and impure metal chlorides.

4. The treatment method for titanium-containing raw material according to claim 1 ,
wherein the recovered solid byproduced material comprises impure metal chlorides, and
further comprising:
before performing the second chlorinating process creating a mixture of the second titanium-containing raw material and the recovered solid byproduced material by adding the second titanium-containing raw material to the recovered solid byproduced material; and
before performing the second chlorinating process vaporizing and removing the impure metal chlorides in the recovered solid byproduced material by heating the mixture.

5. The treatment method for titanium-containing raw material according to claim 1 ,
wherein the recovered solid byproduced material comprises impure metal oxides and impure metal chlorides, and
further comprising:
vaporizing and removing the impure metal chlorides in the recovered solid byproduced material prior to the second chlorination process; and
mixing the recovered solid byproduced material with the titanium-containing raw material prior to the second chlorination process; and
during the second chlorination process separating and removing the impure metal oxides in the recovered solid byproduced material as metal chlorides.

6. The treatment method for titanium-containing raw material according to claim 1 further comprising:
oxidizing the separated impure metals selectively chlorinated to impure metal oxides; and
recovering the impure metal oxides.

7. The treatment method for titanium-containing raw material according to claim 1 , further comprising:
immediately after recovering the solid byproduced material, creating a heated residue by heating at least a part of the recovered solid byproduced material; and
treating the heated residue by at least one of the following processes:
1) granulating the heated residue of the recovered solid byproduced material and supplying the granulated heated residue to a chlorinating furnace:
2) recovering the heated residue of the recovered solid byproduced material for use as a valuable material;
3) a heating process comprising:
generating heat by reacting the heated residue of the recovered solid material with an added oxidizing agent and delivering the generated heat to a heating process;

4) a third chlorination process wherein the heated residue of the recovered solid byproduced material comprises titanium ore, the third chlorination process comprising:
generating titanium tetrachloride from the titanium ore by reacting the heated residue of the recovered solid byproduced material with chlorine; and
recovering the titanium tetrachloride.

8. The treatment method for titanium-containing raw material according to claim 6 , wherein the oxidation of the separated impure metals selectively chlorinated produces chlorine, and further comprising:
recovering the produced chlorine;
delivering a first portion of the recovered chlorine to the first chlorinating process; and
delivering a second portion of recovered chlorine to the second chlorinating process.

9. The treatment method for titanium-containing raw material according to claim 1 , wherein the first titanium-containing raw material has a content of titanium dioxide of 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

• C01G23/022 Primary

  Titanium tetrachloride · CPC title

• C01G49/10

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

• C01B7/035

  Preparation of hydrogen chloride from chlorides · CPC title