Device and method for smelting metal through thermal reduction method

A technology of reduction method and heating device, which is applied in the field of metal smelting, can solve the problems of poor kinetic conditions and large energy consumption, and achieve the effects of improving efficiency, increasing contact area, and improving kinetic conditions

Pending Publication Date: 2021-06-18
CISDI ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the traditional process of smelting metals by thermal reduction method (such as ironmaking), it is necessary to pelletize or sinter the ore powder, and the sintered ore and pellets are cooled before being loaded into the blast furnace for reduction. This process has two major disadvantages : ① Pelletizing and sintering need to consume a lot of energy; ② The kinetic conditions of the contact area reaction between sinter and pellet ore and reducing agent are poor

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  • Device and method for smelting metal through thermal reduction method
  • Device and method for smelting metal through thermal reduction method

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A device for smelting metals by thermal reduction, such as figure 1 As shown, it specifically includes a smelting furnace 1, a heating device 2, an ore powder injection device 3, a reducing agent injection device 4, a slagging agent injection device 5, a metal discharge device 6 and a tail gas export device 7, wherein the heating device 2, Mineral powder injection device 3 and reducing agent injection device 4 are arranged at the upper part of smelting furnace 1;

[0033] In addition, more than one ore powder injection device 3, reducing agent injection device 4 and slagging agent injection device 5 are arranged in the circumferential direction of smelting furnace 1, and the nozzles thereof can be inclined upward or downward; The blowing device can be arranged on one level or multiple levels of the smelting furnace 1; in the height direction of the smelting furnace 1, the reducing agent injection device 4 can be lower than the ore powder injection device 3, or higher th...

Embodiment 2

[0036] A kind of method adopting the device in embodiment 1 to carry out thermal reduction method smelting metal, concrete steps are as follows:

[0037] (1) In the upper part of the smelting furnace 1, the ore powder in the ore powder tank is blown into the smelting furnace 1 by the ore powder injection device 3, and the reducing agent blown in by the reducing agent injection device 4 is under the heating state of the heating device 2 Reaction, enter the lower part of the smelting furnace 1 after the reaction is completed;

[0038] (2) The metal formed by the reaction in step (1) is removed from the metal discharge device 6, and the impurities formed form slag under the action of the slagging agent blown into by the slagging agent injection device 5;

[0039] (3) The reducing tail gas formed by the reaction in step (1) is discharged through the tail gas exporting device 7 .

[0040] Wherein the reduction tail gas is discharged through the tail gas exporting device 7 and ente...

Embodiment 3

[0042] A kind of smelting method that adopts the device in embodiment 1 to carry out metallic iron, its technological process is as follows figure 2 As shown, the specific steps are as follows:

[0043] First of all, the smelting furnace is built with refractory bricks, which are divided into upper and lower parts by a partition. There are holes in the partition, and there is a high-temperature spray coating on the partition. The upper part belongs to the reduction area (with iron ore powder injection device, reducing agent Injection device, furnace top with heating device arc), reducing gas H 2 Injection port, the arc heating on the top of the furnace injects iron ore powder and H into the upper part 2 , maintaining a temperature of 1300°C for redox reactions, making H 2 It can quickly and fully reduce iron ore powder, and the reduced iron-containing materials flow into the lower part through the upper and lower partition holes of the smelting furnace.

[0044]Secondly, t...

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Abstract

The invention relates to a device and method for smelting metal through a thermal reduction method, and belongs to the technical field of metal smelting. The device and method for smelting the metal through the thermal reduction method are provided, and the device comprises a smelting furnace 1, a heating device 2, a mineral powder injection device 3, a reducing agent injection device 4, a slag former injection device 5, a metal discharging device 6 and a tail gas guiding device 7. The device can directly spray mineral powder and a reducing agent into a smelting furnace, heating is quickly conducted in the furnace to the reduction temperature, the reducing agent and the mineral powder are sufficiently contacted to produce reduction reaction, and reducing metal and slag fall into the bottom of the furnace to be layered and are discharged out of the furnace at regular time. When the device is used for smelting the metal by the thermal reduction method, the process energy consumption can be reduced, the contact area of the reducing agent and the mineral powder can be increased, the dynamic conditions of reduction reaction are greatly improved, the metal is quickly reduced, and the efficiency of the reduction reaction is improved.

Description

technical field [0001] The invention belongs to the technical field of metal smelting, and relates to a device and a method for smelting metal by a thermal reduction method. Background technique [0002] In nature, metals mostly exist in the form of oxides. There are three main methods for metal smelting: electrolysis, thermal reduction, and thermal decomposition. And the process of oxidation-reduction reaction on the anode, the electrolytic process can occur when the electrochemical cell is applied with a DC voltage, such as metal K, Ca, Na, Mg, Al, the cost of the electrolysis method is very high, and it is suitable for active metals; the thermal decomposition method is By heating metal oxides, iodides, carbonyl compounds, etc. to decompose them to produce pure metals, it is generally suitable for the extraction of inactive metal elements such as Hg and Ag; thermal reduction method uses a reducing agent with strong thermal reduction to remove metals from their The reducti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B14/00F27B14/08F27B14/14F27B14/16F27D3/16F27D17/00C22B5/02C21B13/00
CPCC21B13/0006C21B13/0073C22B5/02F27B14/00F27B14/08F27B14/0806F27B14/14F27D3/16F27D17/004F27D17/008Y02P10/20
Inventor 许俊邹忠平王刚赵运建牛群
Owner CISDI ENG CO LTD
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