Direct smelting process

A direct, metal smelting technology, applied in the field based on molten baths, can solve problems such as difficult mixing requirements

Inactive Publication Date: 2013-07-31
TECHNOLOGICAL RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In particular, in vessels with an equivalent hearth diameter of 6 m or more, this mixing requirement is significantly more difficult to achieve than in smaller vessels with approximately half the equivalent diameter

Method used

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Embodiment Construction

[0068] The following description is for the production of molten iron according to the HIsmelt process in the case of smelting a metal charge in the form of iron ore fines (typically less than 6 mm). However, it should be understood that the invention is not limited to iron ore and can be applied to smelting any metal material in any material form. Ore is an example of a form of metal material. The invention also extends to other forms of metal material, including by way of example partially reduced ores and metal-bearing waste streams.

[0069] Referring to the drawings, there is shown a vessel 11 having a hearth for containing a molten bath of iron and slag, the hearth comprising a base 12 formed of refractory bricks and sides 13, side walls 14 (which are formed from The sides 13 of the hearth are upwardly extending generally cylindrical barrels) and the top 17 . The side walls 14 and top 17 include water cooling plates (not shown) for transferring heat from the side walls...

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Abstract

A molten bath-based process for direct smelting metalliferous material and producing molten metal in a direct smelting vessel that contains a molten bath that has a metal layer at least 900 mm in depth. The process includes selecting operating parameters of the process so that feed material (solid material and carrier gas) is injected from above the metal layer into the metal layer via at least one solids injection lance with momentum to penetrate to a depth of at least 100 mm below a nominal quiescent surface of the metal layer and to cause upward movement of molten material and gas from the metal layer.

Description

technical field [0001] The present invention relates to a molten bath based process for the direct smelting of metal materials. [0002] In particular, the invention relates to the parameters required for injecting solid material into a molten bath in a molten bath based process for direct smelting of metal material according to the invention. Background technique [0003] Known direct smelting process for metallic materials which in principle relies on a molten bath as smelting medium and is commonly referred to as the HIsmelt process International application PCT / AU96 / 00197 (WO96 / 31627) in the name of the applicant is described in. [0004] The HIsmelt process as described in this international application comprises the following steps in the case of direct smelting of a metal charge in the form of iron oxide and producing molten iron: [0005] (a) forming molten iron and slag baths in direct smelting vessels; [0006] (b) injecting into the molten bath: (i) a metallic ...

Claims

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Application Information

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IPC IPC(8): C21B13/00F27D3/18
CPCC22B5/00C21C5/56C21B13/0006F27D3/18C21C7/0037C21B13/0013F27B3/02F27B3/225Y02P10/134C21B13/00C21B13/0026
Inventor R·J·德赖
Owner TECHNOLOGICAL RESOURCES
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