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Direct smelting process and apparatus

A device, molten pool technology, used in the production of iron and/or ferroalloys to solve problems such as slag foaming

Inactive Publication Date: 2007-10-10
TECH RESOURCES PTY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process operating conditions lead to foaming of the slag

Method used

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  • Direct smelting process and apparatus
  • Direct smelting process and apparatus
  • Direct smelting process and apparatus

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Embodiment Construction

[0097] The following description relates to the production of molten iron by smelting iron ore, it being understood that the invention is not limited to this application and is applicable to smelting any suitable feed material.

[0098] The direct smelting plant shown in the drawing comprises a smelting vessel indicated by reference numeral 11 . The vessel 11 has: a hearth comprising a bottom 12 and sides 13 made of bricks of refractory material; side walls 14 forming a substantially cylindrical barrel extending upwardly from the side 13 of the hearth and Comprising an upper cylinder part 51 made of water-cooled panels and a lower cylinder part 53 made of water-cooled panels lined with refractory bricks; furnace roof 17; exhaust gas outlet 18; front for continuous discharge of molten iron furnace 19; and a slag outlet 21 for discharging slag.

[0099]The furnace and upper barrel portion 51 define a cylindrical region within the vessel. The lower barrel portion 53 defines a g...

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Abstract

A direct smelting process for producing iron and / or ferroalloys is provided, which involves injecting feed materials into a molten bath of molten metal in a metallurgical vessel to form an expanded molten bath zone, and injecting oxygen containing gas, wherein the selection of the number of, and position of, the solids injection and oxygen gas injection lances is such that the expanded molten bath zone includes a raised region around the oxygen gas injection region, and such that splashes, droplets and streams of molten material project upwardly from the raised region, and such that a free space forms around a lower end of the oxygen gas injection lance.

Description

technical field [0001] The present invention relates to a method and apparatus for the production of iron and / or ferroalloys from ferrous materials, including iron ore, other ferrous ores such as chromite ore, partially reduced ores, and iron ores such as returned steel ferrous waste streams. [0002] In particular, the invention relates to a direct smelting process based on molten metal baths and a plant for the production of molten iron and / or iron alloys. Background technique [0003] A known molten metal bath based direct smelting process for the production of molten iron is the DIOS process. The DIOS method consists of a pre-production stage and a smelting reduction stage. In the DIOS process, ore (-8mm) is preheated (750°C) and pre-reduced (10 to 30%) in a bubbling fluidized bed using exhaust gas from a smelting reduction vessel containing A molten pool of iron and slag, with the slag forming a deep layer on top of the iron. The fine fraction (-0.3mm) and coarse fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B11/08C21B13/10C21B13/00F27B3/18F27D3/18
CPCC21B13/0013C21B13/0026Y02P10/134C21B11/08
Inventor 罗德尼·J·德赖
Owner TECH RESOURCES PTY LTD