Recycle of titanium diboride materials

Patent metadata

Field	Value
Publication number	US-9822016-B2
Application number	US-201514932573-A
Country	US
Kind code	B2
Filing date	Nov 4, 2015
Priority date	Jun 6, 2012
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A method to recycle TiB2 articles, and in particular, a method to recycle a TiB2 feedstock including TiB2 articles and Ti-ore and/or Ti-slag by chlorination.

First claim

What is claimed is:

1. A method to produce a titanium product, comprising:
preparing a TiB2 feedstock comprising TiB2 articles, wherein preparing the TiB2 feedstock comprises: crushing the TiB2 articles to a predetermined average TiB2 particle size or TiB2 particle size distribution, and combining the TiB2 articles with at least one of Ti-containing ores and Ti-slag; and
chlorinating the prepared TiB2 feedstock to produce a titanium chloride product.

2. The method of claim 1 , wherein the TiB2 articles comprise at least one of TiB2 armor products, TiB2 tool products, TiB2 coatings, TiB2 electrodes, and TiB2 powders.

3. The method of claim 2 wherein the TiB2 feedstock consists essentially of crushed TiB2 articles.

4. The method of claim 3 , wherein the crushed TiB2 articles comprise at least one of sodium and fluorine residues.

5. The method of claim 4 , wherein the crushed TiB2 articles comprise no more than 2% sodium and fluorine residues.

6. The method of claim 2 , wherein preparing of the TiB2 feedstock further comprises crushing the combination of TiB2 articles with at least one of Ti-containing ores and Ti-slag to a predetermined average particle size or particle size distribution to prepare the TiB2 feedstock.

7. The method of claim 6 , wherein the Ti-containing ore comprises Ilmenite.

8. The method of claim 7 , wherein the Ti-containing ore comprises a TiO2 content of at least 80% by weight.

9. The method of claim 8 , wherein the Ti-slag comprises smelting products of ilmenite ore processed to lower the iron content thereof.

10. The method of claim 9 , wherein the Ti-slag has a TiO2 content of at least 85%.

11. The method of claim 10 , wherein the TiB2 feedstock comprises no more than 10% TiB2 articles.

12. The method of claim 11 , wherein the TIB2 feedstock comprises impurities.

13. The method of claim 12 , wherein the impurities comprise at least one of Fe, Ni, Co, W, Na, F, Al, Li, Mg, Ca, Cl, halide salts, borates, and combinations thereof.

14. The method of claim 13 , wherein the impurities comprise residual salts, residual electrolytic bath, sodium-containing materials, calcium-containing materials, and fluoride containing materials.

15. The method of claim 14 , wherein the chlorinating of the prepared TiB2 feedstock comprises chlorinating the prepared TiB2 feedstock through a fluidized bed chlorinator at between 900° C. and 1000° C.

Assignees

• Alcoa Inc
• Alcoa Usa Corp

Inventors

• Weaver Mark L
• Schnitgen Andrew L
• Dimilia Robert A
• Phelps Frankie A
• Mcmillen James C

Classifications

• C01G23/02 Primary

  Halides of titanium · CPC title

• C01B35/1027

  Oxides · CPC title

• C01G23/022 Primary

  Titanium tetrachloride · CPC title

• C01G23/07

  Producing by vapour phase processes, e.g. halide oxidation · CPC title

• C01B35/04 Primary

  Metal borides · CPC title