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Combined method and device for smelting reduction ironmaking

A combined type and smelting furnace technology, which is applied in the field of smelting reduction ironmaking and combined smelting reduction ironmaking, can solve the problems of harsh equipment requirements and high power consumption, and achieve small footprint, good construction flexibility, and improved The effect of iron production capacity

Active Publication Date: 2010-10-20
SHIJIAZHUANG XINHUA IND FURNACE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technology is operated by an electric arc furnace, which consumes a large amount of electric energy and requires demanding equipment

Method used

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  • Combined method and device for smelting reduction ironmaking
  • Combined method and device for smelting reduction ironmaking
  • Combined method and device for smelting reduction ironmaking

Examples

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Embodiment 1

[0029] Combined smelting reduction ironmaking device of the present invention such as figure 1 , figure 2 , image 3 As shown in , it includes three reduction smelting furnaces 3 and supporting feeding equipment, discharging equipment, fuel and combustion-supporting gas supply equipment and exhaust gas discharge system, which are arranged in a ring. The upper part of the reduction smelting furnace is provided with an oxygen / fuel nozzle 4 and a feed port 6, the feed port has a feed lock 5, and the oxygen fuel nozzle is a gas fuel burner. The lower part of the reduction smelting furnace is provided with a discharge port 8, and a discharge lock 7 is provided at the discharge port. Both sides of each reduction smelting furnace are connected with heat accumulator 10, and there is a heat accumulator in the heat accumulator, and a gas nozzle 9 is arranged between the reduction smelting furnace and the heat accumulator. The reduction smelting furnaces are installed in series throu...

Embodiment 2

[0032] Another embodiment of the present invention is as Figure 4 As shown, it consists of two reduction smelting furnaces and matching equipment and systems. Two reduction smelting furnaces are operated in series, one of which is for smelting and reduction process, and the other reduction smelting furnace is for material heating process, after completion, the process of the two reduction smelting furnaces is exchanged. The material to be reduced in Example 16 is a coated column, such as Figure 7 , Figure 8 As shown, the coating column is a hollow column structure, and the coating 17 of the coating column is formed by bonding limestone powder with a binder, and the binder is silica sol. The material 19 in the coating is formed by pressing balls of iron ore powder, and the hollow 18 of the coating column is convenient for gas circulation and heating. The coating column is loaded into the reduction smelting furnace 3 on the left side through the feed port 6 by means of a f...

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Abstract

The invention provides a combined method and a combined device for smelting reduction ironmaking. The device comprises reduction smelting furnaces and matched equipment; and two sides of the reduction smelting furnaces are connected with heat accumulators. 2 to 20 reduction smelting furnaces are connected in series, parallelly arranged or annularly arranged. In the production, the reduction smelting furnaces perform the heating, reduction and smelting processes in turn. In the smelting process, heating and smelting under incomplete combustion is carried out, and reduction gas is generated; the reduction gas and product gas in the smelting process are taken as reducing agents in the reduction process; and flue gas and excessive CO are combusted in the reduction smelting furnace in the heating process to heat reduced materials. The product gas generated in the smelting process is fully utilized for the reduction in the reduction process; the afterheat and residual combustible components in the smelting and reduction processes are combusted to heat raw materials; the product gas in the smelting process is fully utilized; energy is saved; the total area and space of the device are reduced; and the ironmaking production capacity is improved.

Description

technical field [0001] The invention belongs to the technical field of reduction ironmaking, and relates to a method and a device for smelting reduction ironmaking, in particular to a combined method and device for smelting reduction ironmaking. Background technique [0002] Smelting reduction ironmaking is an important part of steel production. Its main feature is that it uses non-coking coal as a primary energy source and reducing agent to reduce iron oxides in a molten state. It has the advantages of using coal instead of coke, short process, and environmental pollution. Small size, low construction investment, low production cost and other advantages, it is an area that is widely favored by the industry, and iron and steel enterprises in various countries are competing to carry out research and development. The existing smelting reduction ironmaking methods mainly include COREX method (CN1010323B), DIOS method (CN1035136A), and HISELT method (CN1037542A). Among them, th...

Claims

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Application Information

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IPC IPC(8): C21B11/00C21B13/00
Inventor 贾会平
Owner SHIJIAZHUANG XINHUA IND FURNACE CO LTD
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