Recycle of titanium diboride materials

Patent metadata

Field	Value
Publication number	US-2016052795-A1
Application number	US-201514932573-A
Country	US
Kind code	A1
Filing date	Nov 4, 2015
Priority date	Jun 6, 2012
Publication date	Feb 25, 2016
Grant date	—

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

1 . A method to produce a titanium product, comprising:
preparing a TiB2 feedstock; and chlorinating the prepared TiB2 feedstock to produce a titanium chloride product.

2 . The method of claim 1 , wherein the TiB2 feedstock comprises TiB2 articles, and the preparing of the TiB2 feedstock comprises crushing the TiB2 articles to a predetermined average TiB2 particle size or TiB2 particle size distribution.

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

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

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

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

7 . The method of claim 2 , wherein the preparing of the TiB2 feedstock further comprises combining the TiB2 articles with at least one of Ti-containing ores and Ti-slag.

8 . The method of claim 3 , 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.

9 . The method of claim 8 , wherein the Ti-containing ore comprises ilmenite.

10 . The method of claim 9 , wherein the Ti-containing ore comprises has a TiO2 content of at least 80% by weight.

11 . The method of claim 10 , wherein the Ti-slag comprises smelting products of ilmenite ore processed to lower the iron content thereof.

12 . The method of claim 11 , wherein the Ti-slag has a TiO2 content of at least 85%.

13 . The method of claim 12 , wherein the TiB2 feedstock comprises no more than 10% TiB2 articles.

14 . The method of claim 13 , wherein the TiB2 feedstock comprises impurities.

15 . The method of claim 14 , 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.

16 . The method of claim 15 , wherein the impurities comprise residual salts, residual electrolytic bath, sodium-containing materials, calcium-containing materials, and fluoride containing materials.

17 . The method of claim 16 , wherein the chlorinating of the prepared TiB2 feedstock comprises chlorinating the prepared TiB2 feedstock with chlorine gas and coke under a reducing atmosphere.

18 . The method of claim 17 , wherein the chlorinating of the prepared TiB2 feedstock comprises chlorinating the prepared TiB2 feedstock with chlorine gas and coke at above 700° C.

19 . The method of claim 17 , wherein the chlorinating of the prepared TiB2 feedstock comprises chlorinating the prepared TiB2 feedstock with chlorine gas and coke at under 900° C.

20 . The method of claim 16 , 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.

21 .- 41 . (canceled)

Assignees

• Alcoa Inc

Inventors

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

Classifications

• C01G23/07

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

• C22B34/1222

  using a halogen containing agent · 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

• C01B35/061

  Halides · CPC title