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Method for producing molten steel continuously through microwave and induction heating of carbon-containing pellets

An induction heating and microwave heating device technology, applied in the field of iron and steel metallurgy, can solve the problems of low production efficiency and energy utilization, poor air permeability in the furnace, complex process flow, etc., to ensure full reduction, improve air permeability, and benefit slag iron The effect of melting

Active Publication Date: 2016-09-21
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to overcome the deficiencies in the existing direct steelmaking process, which are prone to slag foaming, poor gas permeability in the furnace, long production cycle, low production efficiency and energy utilization rate, large environmental pollution and complicated process flow, and provide a Method for continuous production of molten steel by microwave and induction heating carbonaceous pellets

Method used

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  • Method for producing molten steel continuously through microwave and induction heating of carbon-containing pellets

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Effect test

Embodiment 1

[0046] Such as figure 1 As shown, a device for continuous production of molten steel by microwave and induction heating carbon-containing pellets in this embodiment includes a steelmaking furnace body, and the steelmaking furnace body includes an upper microwave reduction furnace 2 and a lower induction melting furnace 7 , the microwave reduction furnace 2 is used for heating and reducing the carbon-containing pellets, the induction melting furnace 7 is used for the slag iron melting reaction, and the microwave reduction furnace 2 and the induction melting furnace 7 are connected through the discharge valve 6 , the complete isolation of the carbon-containing pellet reduction and slag-iron melting reaction is realized, and the reduction reaction basically does not occur in the induction melting furnace 7, thereby preventing the CO gas generated by the reduction of carbon-containing pellets from affecting the slag, and avoiding the slag containing When the carbon pellets are red...

Embodiment 2

[0067] A kind of microwave and induction heating carbon-containing pellet continuous production molten steel device of this embodiment is basically the same as embodiment 1, and its difference lies in the following aspects: the number of microwave reduction furnace 2 is 3 in the present embodiment, thereby can significantly Improve production efficiency and production capacity, overcome the disadvantage that when only one microwave reduction furnace 2 is installed, the production progress is greatly affected by the fluctuation of the working state of the microwave reduction furnace 2, and when the input amount of carbon-containing pellets is the same, by setting multiple The microwave reduction furnace 2 can further ensure sufficient reduction inside the carbon-containing pellets, which is beneficial to improving the reduction rate and reduction efficiency of the carbon-containing pellets.

[0068] There are 3 rows of microwave heating devices in this embodiment, and an upper r...

Embodiment 3

[0083] A kind of microwave and induction heating carbon-containing pellet continuous production molten steel device of this embodiment is basically the same as embodiment 2, and its difference lies in the following aspects: the number of microwave reduction furnace 2 is 2 in the present embodiment; There are a plurality of air guide pipes 4, all of which are evenly distributed along the axial direction parallel to the microwave reduction furnace 2, so as to further ensure uniform heating of the inside of the carbon-containing pellets and ensure sufficient and complete reduction.

[0084] The method for continuous production of molten steel by microwave and induction heating of carbon-containing pellets in this embodiment comprises the following steps:

[0085] Step 1. Loading and preheating of carbon-containing pellets:

[0086] The carbon-containing pellets are transported to the distribution device 1 through the belt feeder outside the furnace body, and the carbon-containing...

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Abstract

The invention discloses a method for producing molten steel continuously through microwave and induction heating of carbon-containing pellets and belongs to the technical field of ferrous metallurgy. The method for producing the molten steel continuously through microwave and induction heating of the carbon-containing pellets comprises the steps of feeding and preheating of the carbon-containing pellets, reduction of the carbon-containing pellets, formation of a steel bath pool, and the melt separation reaction of iron slag. By using the technical scheme, ultrashort-procedure direct steemaking can be achieved; by controlling the C / O molar ratio of the added carbon-containing pellets, control over the C content in the molten steel is achieved, and the problems that in the prior art, bubblization of furnace slag is caused, and the metallization ratio is low after the carbon-containing pellets are reduced are solved; the energy utilization rate is high, the production efficiency is high, and continuous steelmaking is achieved; and in addition, the capital cost and equipment investment are greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and more specifically relates to a method for continuously producing molten steel by microwave and induction heating carbon-containing pellets. Background technique [0002] The traditional long-process iron and steel production process is mainly from coke oven coking, sintering (or pelletizing), blast furnace ironmaking to converter steelmaking. The entire process requires large investment and high energy consumption, and the greenhouse gas CO 2 It is difficult to effectively reduce the emissions. Blast furnace ironmaking is inseparable from coke. With the increasing shortage of coking coal for coking and the increasing pressure on environmental protection, it is of great strategic significance to cancel coke oven coking-sintering-blast furnace ironmaking and other processes to realize direct steelmaking from ore and coal , is the goal pursued by metallurgists. [0003] The d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/00
CPCC21B13/004Y02P10/20
Inventor 杨佳龙李家新郭其飞杨建张春雷陈小龙相冬文贾晓颖杨乐彪佘文文孟庆民狄瞻霞
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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