Electromagnetic heating carbon-bearing pellet continuous direct steelmaking device

A technology of carbon pellets and electromagnetics, applied in the direction of electric furnaces, furnace types, furnaces, etc., can solve problems such as low production efficiency and energy utilization, complex process flow, slag foaming, etc., achieve uniform heating, realize heating conditions, and good The effect of mobility

Active Publication Date: 2015-10-21
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiencies of easy occurrence of slag foaming, long production cycle, low production efficiency and energy utilization rate and complex process flow when using the existing direct steelmaking equipment for steelmaking, and provides an electromagnetic heating carbon-containing sphere Group continuous direct steelmaking plant

Method used

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  • Electromagnetic heating carbon-bearing pellet continuous direct steelmaking device
  • Electromagnetic heating carbon-bearing pellet continuous direct steelmaking device

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Such as figure 1As shown, an electromagnetically heated carbon-containing pellet continuous direct steelmaking device of this embodiment includes a steelmaking furnace body 4, and a distribution port 1 and a gas outlet 2 are arranged on the top of the steelmaking furnace body 4, wherein the distribution port 1 is connected with the belt feeder outside the furnace body, and the gas outlet 2 is connected with the gas collection device. The above-mentioned steelmaking furnace body 4 sequentially includes a material distributing area, a reduction area 401, a reflow area 402 and a slag-iron melting area from top to bottom. Among them, the material distributing area, the reduction area 401 and the reflow area 402 form a double circular truncated structure. The reduction area 401 includes two parts, an upper reduction area and a lower reduction area. The upper part of the lower circular platform of the double truncated circular structure, and the reflow zone 402 is located at...

Embodiment 2

[0041] An electromagnetically heated carbon-containing pellet continuous direct steelmaking device of this embodiment is similar to that of Embodiment 1, the difference being that there are three rows of microwave heating devices around the body of the furnace in the reduction zone 401 of the steelmaking furnace, one of which is located at Around the furnace body corresponding to the material distribution area, the other two rows are located around the furnace body corresponding to the upper reduction area.

[0042] A kind of electromagnetic heating carbon-containing pellet continuous direct steelmaking method of the present embodiment, its steps are:

[0043] Step 1. Preheating of carbon-containing pellets:

[0044] The carbon-containing pellets were preheated at 200° C. for 13 minutes. The carbon-containing pellets in this example were composed of the following components in mass percent: iron fine powder 82%, coal powder 15% and binder 3%, Among them, the mass fraction of ...

Embodiment 3

[0052] The electromagnetically heated carbon-containing pellet continuous direct steelmaking device of this embodiment is the same as that of Embodiment 1.

[0053] A kind of electromagnetic heating carbon-containing pellet continuous direct steelmaking method of the present embodiment, its steps are:

[0054] Step 1. Preheating of carbon-containing pellets:

[0055] The carbon-containing pellets were preheated at 170° C. for 15 minutes. The carbon-containing pellets in this example consisted of the following components in mass percent: 80% iron fine powder, 18.5% coal powder and 1.5% binder, Among them, the mass fraction of TFe in the fine iron powder is 68%, the mass fraction of S is 1.5%, and the mass fraction of P is <0.5%. The fixed carbon content of the coal powder used is 88%, and the binder is selected from bentonite. The specific preparation method of the carbon-containing pellets is as follows: the iron fine powder, coal powder and binder are weighed according to th...

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Abstract

The invention discloses an electromagnetic heating carbon-bearing pellet continuous direct steelmaking device and belongs to the technical field of ferrous metallurgy. The electromagnetic heating carbon-bearing pellet continuous direct steelmaking device comprises a steelmaking furnace body, a material distributing port and a coal gas outlet are formed in the top of the steelmaking furnace body, a double-circular-truncated-cone structure is composed of a material distributing area, a reduction area and a soft melting area of the steelmaking furnace body, and an iron slag melting separation area is of a cylindrical structure. At least two rows of microwave heating devices are arranged on the parts, in the material distributing area and the reduction area, of the periphery of the furnace body, and electromagnetic induction heating devices are arranged on the parts, in the soft melting area and the iron slag smelting separation area, of the periphery of the furnace body. By means of the electromagnetic heating carbon-bearing pellet continuous direct steelmaking device, an iron smelting and manufacturing device and a steelmaking device can be integrated, qualified high-quality molten steel can be produced directly through carbon-bearing pellets without blowing, the problem that secondary decarburization is needed in traditional furnace slag foaming and molten iron carburization is solved, the production efficiency is high, continuous steelmaking is achieved, and the capital construction cost and equipment investment are greatly saved.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgical equipment, and more specifically relates to a continuous direct steelmaking device for electromagnetically heating carbon-containing pellets. Background technique [0002] The traditional steel production process mainly includes a long process from coke oven coking, sintering (or pelletizing), blast furnace ironmaking to converter steelmaking, and a short process from scrap steel, sponge iron to electric arc furnace. Although the short process has little pressure on the environment, due to the impact of the shortage of scrap steel resources, there is still a certain production difficulty in my country's electric furnace steelmaking, and the long process steelmaking still occupies a dominant position. However, with the increasing shortage of non-renewable resources, especially coking coal for coking, and the increasing pressure on environmental protection, coke oven coking-sint...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/12
Inventor 杨佳龙李家新郭其飞解成成梁晨陈小龙贾晓颖张春雷相冬文孟庆民狄瞻霞
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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