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Method and system for processing copper-containing iron powder

A copper-iron and iron-pentacarbonyl technology, applied in the metallurgical industry, can solve problems such as many process steps, difficult large-scale industrial application, and harsh conditions

Active Publication Date: 2018-07-10
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these methods cannot be further developed due to low copper removal ability or too harsh conditions.
For example, when melting separation is used, it is only suitable for processing small pieces of steel scrap containing a large amount of exposed copper; if gasification separation is used, it is difficult to promote it on a large scale due to problems such as many process steps and gas pollution; if vacuum separation is used, it is only suitable for Decopper from molten steel, but there are problems such as large iron loss and slow removal speed, so it is difficult for large-scale industrial application

Method used

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  • Method and system for processing copper-containing iron powder
  • Method and system for processing copper-containing iron powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] [1] The copper-containing iron powder obtained after "copper slag-pelletizing-drying-rotary hearth furnace direct reduction-grinding magnetic separation" is processed, and its TFe grade is 88%, Cu content is 1%, S The content is 0.4%, and its particle size is -0.074mm, accounting for 60%.

[0048] [2] Put the copper-containing iron powder into the reactor, and then introduce the pressurized CO into the reactor, so that the pressure in the reactor is 15MPa, and heat the reactor at the same time, so that the temperature in the reactor reaches 180 ℃, so that the copper-containing iron powder undergoes a synthesis reaction to generate gaseous iron pentacarbonyl. At the same time, the sulfur in the iron powder gradually generates carbonyl sulfide, which reacts with part of the copper to generate Cu 2 S, to further promote the separation of copper and iron, the specific reaction equation is:

[0049] Fe+5CO=Fe(CO) 5

[0050] At the same time, the sulfur in the iron powder ...

Embodiment 2

[0058] [1] The copper-containing iron powder obtained after "nickel slag-pelletizing-drying-rotary hearth furnace direct reduction-grinding magnetic separation" is processed, and its TFe grade is 92%, Cu content is 0.5%, S The content is 0.3%, and its particle size is -0.074mm, accounting for 80%.

[0059] [2] Feed the copper-containing iron powder into the reactor, and then introduce the pressurized CO into the reactor, so that the pressure in the reactor is 12MPa, and heat the reactor at the same time, so that the temperature in the reactor reaches 200 ℃, so that the copper-containing iron powder undergoes a synthesis reaction to generate gaseous iron pentacarbonyl. At the same time, the sulfur in the iron powder gradually generates carbonyl sulfide, which reacts with part of the copper to generate Cu 2 S, to further promote the separation of copper and iron, the specific reaction equation is:

[0060] Fe+5CO=Fe(CO) 5

[0061] At the same time, the sulfur in the iron powd...

Embodiment 3

[0069] [1] The copper-containing iron powder obtained after "copper slag-raw material treatment-rotary kiln direct reduction-grinding magnetic separation" is processed, and its TFe grade is 94%, Cu content is 0.2%, and S content is 0.1%. , and its particle size is -0.074mm, accounting for 90%.

[0070] [2] Feed the copper-containing iron powder into the reactor, and then introduce the pressurized CO into the reactor, so that the pressure in the reactor is 10MPa, and heat the reactor at the same time, so that the temperature in the reactor reaches 220 ℃, so that the copper-containing iron powder undergoes a synthesis reaction to generate gaseous iron pentacarbonyl. At the same time, the sulfur in the iron powder gradually generates carbonyl sulfide, which reacts with part of the copper to generate Cu 2 S, to further promote the separation of copper and iron, the specific reaction equation is:

[0071] Fe+5CO=Fe(CO) 5

[0072] At the same time, the sulfur in the iron powder w...

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Abstract

The invention discloses a method and a system for processing copper-containing iron powder. The method for processing the copper-containing iron powder comprises the following steps: ensuring the copper-containing iron powder and carbon monoxide to generate reaction in a gasification synthesis reaction device so as to obtain gaseous carbonyl iron and cuprous sulfide containing solid slag; carrying out decompression cooling on the gasification synthesis reaction device to ensure the gaseous carbonyl iron to convert to liquid carbonyl iron so as to obtain a solid-liquid mixture; carrying out solid-liquid separation on the solid-liquid mixture so as to obtain the liquid carbonyl iron and solid tailings respectively; gasifying and decomposing the liquid carbonyl iron in a pyrolyzing furnace so as to obtain metal iron powder; and carrying out fine grinding and floatation treatment on the solid tailings so as to obtain copper concentrates and tailings. Therefore, with the adoption of the method, copper and iron are effectively separated when sulfur elements in a raw materials are fully utilized, and thus an iron product with high purity and high additional value and the copper concentrates with the copper content to be above 30 percent are obtained, the applicability is good, and the economic benefit is dramatic.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method and system for processing iron powder containing copper. Background technique [0002] In a broad sense, copper-containing iron powder refers to granular iron products containing a certain amount of copper, which can be used as raw materials for electric furnace steelmaking or special steel (mainly weathering steel) after briquetting, but as raw materials for electric furnace steelmaking When copper is an impurity element, it can only be used as a raw material for ingredients or sold at a discount; when it is used as a raw material for weathering steel, due to the limitation of market demand, the product advantages are not obvious. [0003] It is difficult for such iron products to achieve high-efficiency separation of copper and iron by conventional methods, so the quality of iron products is low and the product value is limited. In the prior art, only a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B3/02C22B7/00C22B5/20C22B5/12C22B15/00C21B15/04B03D1/00
CPCB03D1/00C21B15/04C22B5/12C22B5/20C22B7/001C22B15/00Y02P10/20
Inventor 刘占华王欣曹志成薛逊吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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