Iron ore well-blended powder with pelletizing undersize for reducing cost and improving efficiency

A technology of applying balls and pellets, applied in the field of iron ore mixing powder, can solve the problems of reduced sinter strength, poor reducibility, and increased ore return rate.
CN108929949AInactive Publication Date: 2018-12-04上海慧安科技股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
上海慧安科技股份有限公司
Publication Date
2018-12-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an iron ore well-blended powder with pelletizing undersize for reducing cost and improving efficiency. The iron ore well-blended powder includes, by weight, 5-15% of the pelletizing undersize, 15-30% of Brazilian Carajas sinter feed, 10-25% of Brazilian coarse iron ore powder, 15-25% of West Australian powder, 15-25% of Australian FB powder, and 5-15% of Indian coarse ironore powder. In the invention, the byproduct, pelletizing undersize, which is generated during a direct iron reduction production process, is successfully applied to sinter the well-blended ore; by matching proper iron ore, adverse factors, such as low assimilation temperature of the pelletizing undersize, poor liquid-phase flowability and poor generation capability of calcium ferrite, are overcome, thus guaranteeing the application effect of the pelletizing undersize.
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Description

technical field

[0001] The invention belongs to the technical field of ironmaking raw material preparation and sintering production, and in particular relates to an iron ore mixed powder that uses pellet crushing to reduce costs and increase efficiency. Background technique

[0002] Direct reduced iron production is a relatively mature short-process ironmaking process. At present, the world's production capacity is more than 70 million tons, mainly distributed in the Middle East and Eastern Europe. In the production process of direct reduced iron, the pellet under-sieve powder produced by the reducing pellet production line is called pellet crushing. This by-product has the advantages of high grade and less harmful impurities. Due to the lack of sintering machine production technology in the Middle East, Eastern Europe and other regions, these resources cannot be effectively used. Therefore, the by-products produced in the direct reduced iron process in these regions are mos...

Claims

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