Microwave heating method and apparatus for iron oxide reduction

A technology of iron oxide and microwave radiation, which is applied in lighting and heating equipment, metal processing, sustainable manufacturing/processing, etc., can solve the problems of waste of carbon combustibles and increase of carbon "footprint", achieve easy continuous processing, avoid sulfur and The effect of phosphorus residues

Inactive Publication Date: 2009-09-30
J·Y·黄 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Another disadvantage of the conventional ironmaking process is that the forced blast heating to reduce the iron ore causes all the carbon mixed in the feedstock to be combusted to form carbon dioxide, which wastes otherwise useful carbon combustibles and contributes to the Processes increase carbon 'footprint'

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  • Microwave heating method and apparatus for iron oxide reduction
  • Microwave heating method and apparatus for iron oxide reduction
  • Microwave heating method and apparatus for iron oxide reduction

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Embodiment Construction

[0040] In the Detailed Description section that follows, certain terminology will be used for clarity of presentation and specific embodiments will be described in accordance with 35 USC 112 . However, it should be understood that this should not limit, nor should it be a limit to various forms and changes of the present invention that may occur within the scope of the claims.

[0041] Referring to the accompanying drawings in particular Figure 1-5 , depicts a rotary hearth furnace 10 according to the present invention. The rotary hearth furnace comprises a fixed annular upper furnace chamber 12 having an inner wall 14 composed of refractory insulating material, a stainless steel inner skin 16 connected to built-in anchors 17 in the refractory wall 14 . An annular hearth 20 supported by a rotating base assembly 18 is rotatable beneath a stationary annular furnace chamber 12 by a motor-right-angle drive 24 and a chain 26 . Below the support plate 23 , a series of main roller...

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Abstract

The present invention discloses a method and apparatus for reducing iron oxides using microwave heating in a furnace chamber which is sealed against the entrance of air reduces trie energy required and produces a low temperature reduction and allows the recovery of combustible synthetic gas as a byproduct of the process. Avoidance of the reduction of sulfur, phorphorus and silica is also insured, as is the need to reduce the silica content of the feed material prior to reducing the ore. A continuous rotary hearth furnace, a rotary kiln, a linear conveyor and vertical shaft furnace chamber configurations are described. A secondary heating zone can also be included to process the reduced iron into iron nuggets or liquid metallic iron.

Description

[0001] For related applications see [0002] This application claims the benefit of U.S. Provisional Patent Applications Serial No. 60 / 849,098 filed October 3, 2006 and Serial No. 60 / 865,672 filed November 14, 2006; and filed September 6, 2005 11 / 220,358 of U.S. Patent Application Serial No. 11 / 220,358 claiming serial numbers 60 / 607,381 filed September 3, 2004 and the September 3, 2004 benefit from U.S. Provisional Patent Application Serial No. 60 / 607,140 filed on . Background technique [0003] Steel is currently produced by two types of business units: integrated steelworks and small steelworks. In an integrated steelmaking plant, sintered iron ore pellets, coke and lime are fed into a blast furnace (BF), where hot air is blown at high velocity to burn the coke, thereby producing carbon monoxide and heat. Sintered iron ore pellets are reduced to high temperature metal by carbon monoxide and melted to form liquid iron. The liquid iron is then fed into a Basic Oxygen Furna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B11/00
CPCF27B7/34F27B9/36C21B13/08F27B9/16C21B2100/02C21B13/143C21C5/567C21B13/0046C21B13/105C21B2100/42C21B2100/66Y02P10/122Y02P10/134
Inventor J·Y·黄X·黄
Owner J·Y·黄
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