Direct Smelting Process

Patent metadata

Field	Value
Publication number	US-2017081745-A1
Application number	US-201615365026-A
Country	US
Kind code	A1
Filing date	Nov 30, 2016
Priority date	May 18, 2010
Publication date	Mar 23, 2017
Grant date	—

Abstract

A molten bath-based direct smelting process comprises controlling the process conditions in a direct smelting vessel so that molten slag in a molten bath of metal and slag in the vessel has a viscosity in a range of 0.5-5 poise when the slag temperature is in the range of 1400-1550° C. in the molten bath in the vessel.

First claim

What is claimed is:

1 . A molten iron product of a direct smelting process, the molten iron product comprising molten iron and vanadium and wherein the vanadium comprises less than 50% of a total vanadium output from the direct smelting process.

2 . The molten iron product defined in claim 1 , wherein the vanadium in the molten iron product comprises less than 35% of the total vanadium output from the direct smelting process.

3 . The molten iron product defined in claim 1 , wherein the vanadium in the molten iron product comprises less than 20% of the total vanadium output from the direct smelting process.

4 . A slag product of a direct smelting process, the slag product comprising molten slag that includes:
TiO 2 : at least 15 wt. %, SiO 2 : at least 15 to 20 wt. %, CaO: at least 15 to 30 wt. %, Al 2 O 3 : at least 10 to 20 wt. %, FeO: at least 3 to 10 wt. %, carbon content: 3-5%, and vanadium oxide comprising more than 50% of a total vanadium output from the direct smelting process.

5 . The slag product defined in claim 4 , wherein vanadium in the slag product comprises more than 65% of the total vanadium output from the direct smelting process.

6 . The slag product defined in claim 4 , wherein vanadium in the slag product comprises more than 80% of the total vanadium output from the direct smelting process.

7 . The slag product defined in claim 4 , wherein the molten slag comprises at least 20 wt. % TiO 2 .

8 . The slag product defined in claim 4 , wherein the molten slag comprises at least 50 wt. % TiO 2 .

9 . The slag product defined in claim 4 , wherein the molten slag further comprises manganese oxide.

10 . A feed material for a sulphate process for producing pigment-grade titania, the feed material being a product of a directing smelting process and having a microstructure that is amenable to processing in the sulphate process and wherein the feed material comprises:
TiO 2 : at least 15 wt. %, SiO 2 : at least 15 to 20 wt. %, CaO: at least 15 to 30 wt. %, Al 2 O 3 : at least 10 to 20 wt. %, FeO: at least 3 to 10 wt. %, carbon content: 3-5% and vanadium oxide comprising more than 50% of a total vanadium output from the direct smelting process.

11 . The feed material defined in claim 10 , wherein vanadium in the vanadium oxide comprises more than 65% of the total vanadium output from the direct smelting process.

12 . The feed material defined in claim 10 , wherein vanadium in the vanadium oxide comprises more than 80% of the total vanadium output from the direct smelting process.

13 . The feed material defined in claim 10 , wherein the feed material comprises at least 20 wt. % TiO 2 .

14 . The feed material defined in claim 10 , wherein the feed material comprises at least 50 wt. % TiO 2 .

15 . The feed material defined in claim 10 , wherein the feed material further comprises manganese oxide.

Assignees

• Tech Resources Pty Ltd

Inventors

• Dry Rodney James
• Pilote Jacques

Classifications

• C22C33/04

  by melting · CPC title

• C21B11/08 Primary

  in hearth-type furnaces · CPC title

• C21B13/0013

  introduction of iron oxide into a bath of molten iron containing a carbon reductant · CPC title

• C21B3/04

  Recovery of by-products, e.g. slag · CPC title

• C22C38/12 Primary

  containing tungsten, tantalum, molybdenum, vanadium, or niobium · CPC title