Production method and smelting reduction device for iron ore direct smelting iron

A production method and technology for iron ore, which are applied in the field of producing molten iron, flash furnace smelting process and its device, smelting reduction process and its device field, can solve the problem of low reducing gas content, insufficient pre-reduction ability, reducing reduction furnace Production efficiency and other issues to achieve the effect of reducing transportation costs, improving pre-cause ability and production efficiency, and shortening transportation distances

Active Publication Date: 2018-10-23
国创华鑫(上海)科技开发有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the high efficiency of the secondary combustion of the HIsmelt method, the content of reducing gas in the gas discharged from the reduction furnace is very small, which makes the pre-reduction capacity insufficient, so that the pre-reduction of iron-containing raw materials can only be maintained at a low level. Thereby reducing the production efficiency of the reduction furnace

Method used

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  • Production method and smelting reduction device for iron ore direct smelting iron
  • Production method and smelting reduction device for iron ore direct smelting iron
  • Production method and smelting reduction device for iron ore direct smelting iron

Examples

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Effect test

Embodiment 1

[0036] In this example, see figure 1 and figure 2 , a smelting reduction device for directly smelting iron from iron ore, which is composed of an upper reaction body 1 and a lower reduction furnace 2, and produces molten iron through two stages of pre-reduction in the reaction tower 4 and final reduction in the lower reduction furnace 2, specifically:

[0037] In this example, see figure 1 , the upper reaction body 1 comprises a circulating gas nozzle 3, a reaction tower 4, a feeding device 5, and a reducing gas nozzle 6, and the upper reaction body 1 adopts a pre-reduction reactor in the form of a flash furnace as a reaction tower 4, so that the reaction tower 4 is directly installed On the top of the lower reduction furnace 2, the reducing gas nozzle 6 and the circulating gas nozzle 3 are all arranged below the feeding port of the feeding device 5, and the preheated reducing gas jet jet injected from the reducing gas nozzle 6 will drop the ore in the reaction tower 4. The...

Embodiment 2

[0049] This embodiment is basically the same as Embodiment 1, especially in that:

[0050] In this example, see image 3, a smelting reduction device for directly smelting iron from iron ore, the feeding device 5 adopts a concentrate nozzle device, and the nozzles of the feeding device 5 are arranged horizontally on the upper part of the reaction tower 4, and the reducing gas nozzle 6 is arranged at the supply Below the nozzle of the feeding device 5 , the gas jet flow direction of the reducing gas nozzle 6 is the same as the mineral material injection direction of the nozzle of the feeding device 5 . According to the special requirements of the concentrate smelting in this embodiment, the feeding device 5 can also be replaced with a concentrate nozzle, which is arranged horizontally and tangentially on the upper end of the reaction tower 4, compared with the smelting reduction device for direct iron smelting of iron ore in the first embodiment In this embodiment, the reducin...

Embodiment 3

[0052] This embodiment is basically the same as the above-mentioned embodiment, and the special features are:

[0053] In this embodiment, according to different process scales, the number of circulating gas nozzles 3 and reducing gas nozzles 6 can be increased to make the temperature of the upper part of the reaction tower 4 more uniform.

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Abstract

The invention discloses a production method for directly smelting iron by iron ores and a smelting reduction device, and belongs to the technical field of non blast furnace iron smelting. The invention solves the following main technical problems: the reduction in the iron smelting process of a flash furnace is not thorough to cause a certain particle size requirements on the iron ores; and the HIsmelt method iron smelting prereduction capacity is weak to influence the production efficiency in a reduction furnace. The production method is characterized in that a flash furnace reaction tower is serially connected with a HIsmelt smelting reduction furnace (SRV furnace); the flash furnace reaction tower is used for performing the prereduction step according to the characteristics of quick reaction and halfway reduction of the flash furnace; and the HIsmelt smelting reduction furnace (SRV furnace) is used for thorough reduction smelting. The advantages of the two are combined for complementation to improve the prereduction capacity and the production efficiency.

Description

technical field [0001] The present invention relates to a non-blast furnace ironmaking method and device, also relates to a flash furnace smelting process and its device, and also relates to a HIsmelt smelting reduction furnace SRV furnace smelting reduction process and its device, especially A method and device for producing molten iron in two stages of reducing atmosphere pre-reduction and liquid melting final reduction are applied in the field of non-blast furnace ironmaking technology and equipment technology. Background technique [0002] Flash furnace metallurgy is a mature smelting technology in the non-ferrous metal industry. The fundamental difference between it and the blast furnace is that the flash furnace is a smelting process in which iron concentrate powder is reduced to a higher metallization rate by a hot reducing gas in a suspended state. The hot reducing gas can be H 2 , can also be CO. The flash furnace only has a reaction space with a negative micro-pr...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C21B13/14
CPCC21B13/0006C21B13/14Y02P10/143Y02P10/20
Inventor于要伟杨宇男张捷宇吴广新魏涵李映邹秀晶
Owner国创华鑫(上海)科技开发有限公司