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Method and apparatus for producing reduced metal

A metal manufacturing and equipment technology, applied in the field of reduced metal manufacturing, can solve problems such as difficulties in regenerative combustion furnaces

Inactive Publication Date: 2009-10-28
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the first half of the reduction process at the beginning of heating, volatile substances are easy to volatilize in large quantities, and in the second half of the reduction process, in order to prevent re-oxidation and maintain a high metal rate, sufficient reducing gas must be maintained. In this case, use Regenerative combustion furnace is very difficult

Method used

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  • Method and apparatus for producing reduced metal
  • Method and apparatus for producing reduced metal
  • Method and apparatus for producing reduced metal

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Embodiment Construction

[0030] Below, refer to Figure 1 to Figure 11 , the embodiment of the present invention will be described by taking reduced iron manufacturing equipment as an example.

[0031] The reduced iron production equipment of the present invention uses Figure 7A , Figure 7B The regenerative combustion furnace shown in. The regenerative combustion furnace 2 has two intake and exhaust sections (2a, 2b). First, if Figure 7A In the state shown, the air intake and exhaust part 2a on one side is used as the combustion side where fuel and combustion air pass through the fuel pipeline 3 through the fuel switching valve 5a and then pass through the regenerator 7a for combustion. The other side of the suction and exhaust part 2b sucks heated air or high-temperature gas such as combustion gas on the combustion side of the suction and exhaust part 2a, passes through the regenerator 7b, and passes through the exhaust switching valve 6b from the exhaust pipe 4b to the Exhaust gas externally...

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Abstract

A reduced metal manufacturing equipment, the combustion gas of the regenerative combustion furnace is an oxidizing gas, and the gas surrounding the carbon material block inside is a reducing gas, the regenerative combustion furnace is in a horizontal direction, and one side The combustion gas in the suction and exhaust part of the regenerative combustion furnace can realize heat storage and exhaust in the suction and exhaust part of the regenerative combustion furnace on the other side, and the regenerative combustion furnace is installed in the reduction process In the second half of the rear part, a gas discharge part is provided in front of it, and the installation position of the regenerative combustion furnace is on the process where the surface temperature of the built-in carbon block material is below 1250 ° C, and the rear of this process is provided There is a gas discharge part.

Description

technical field [0001] The present invention relates to a manufacturing device for reduced iron or reduced metal and a method for manufacturing reduced metal. The reduced iron or reduced metal is produced by putting a block of built-in carbon material made of reducing materials containing iron oxide materials or non-ferrous metal oxides and carbonaceous materials into a moving bed type reduction furnace, and then heating and reducing. Background technique [0002] The regenerative combustion furnace has two suction and exhaust parts. One suction and exhaust part is used as the combustion side by burning fuel and combustion air. High-temperature gas such as combustion gas is exhausted to the outside and used as the exhaust side. A regenerator is provided in each of these suction and exhaust parts, and the heat storage body is stored in the suction and discharge part on the exhaust side when high-temperature gas is sucked in. When the suction and discharge part on the combust...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B5/10F27B9/16C21B13/10C22B1/245F27B9/26
CPCC22B1/245C22B5/10F27B9/26C21B13/10C21B13/105Y02P10/20
Inventor 立石雅孝铁本理彦
Owner KOBE STEEL LTD
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