CN112410548A - Process for preparing metallized hot pellets by using waste heat of electric arc furnace - Google Patents
Process for preparing metallized hot pellets by using waste heat of electric arc furnace Download PDFInfo
- Publication number
- CN112410548A CN112410548A CN202011044133.0A CN202011044133A CN112410548A CN 112410548 A CN112410548 A CN 112410548A CN 202011044133 A CN202011044133 A CN 202011044133A CN 112410548 A CN112410548 A CN 112410548A
- Authority
- CN
- China
- Prior art keywords
- electric arc
- arc furnace
- pellets
- mineral powder
- metallized
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0046—Making spongy iron or liquid steel, by direct processes making metallised agglomerates or iron oxide
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a process method for preparing metallized hot pellets by using waste heat of an electric arc furnace. The process method for preparing the metallized hot pellets by the waste heat of the electric arc furnace comprises the steps of firstly mixing and stirring mineral powder, reducing agent and fusing agent uniformly according to a proportion, preparing the mineral powder, the reducing agent and the fusing agent which are mixed and stirred uniformly into high-pressure briquetting pellets by using a high-pressure ball press machine, introducing high-temperature flue gas generated during the operation of the electric arc furnace into a pellet heating device from a fourth hole of the electric arc furnace by using a fan in a negative-pressure air extraction mode, the high-pressure briquetting pellets are transformed into metallized hot pellets with the metallization rate of more than 80 percent and the self temperature of more than 800 ℃, and the metallized hot pellets are sent into an electric arc furnace through a fourth hole of the electric arc furnace, because the metallized hot pellets are fed into the furnace in a hot state, the energy consumption of the ore-smelting furnace after the conventional cold-state metallized pellets are fed into the furnace is reduced, and because the high-temperature flue gas discharged from the fourth hole of the electric arc furnace is utilized to produce the metallized hot pellets, the energy consumption in the manufacturing process of the conventional metallized pellets is reduced.
Description
Technical Field
The invention relates to the technical field of electric arc furnace waste heat utilization, in particular to a process method for preparing metallized hot pellets by using electric arc furnace waste heat.
Background
The electric arc furnace generates a large amount of waste heat smoke during working and discharges the waste heat smoke from the fourth hole, the temperature of the waste heat smoke is up to over 1000 ℃, and aiming at the high-temperature waste heat, a plurality of electric arc furnace waste heat utilization technologies are implemented in China: for example, in an electric arc furnace waste heat utilization system with the patent number of CN201821367912.2, a combustion settling chamber is arranged between the electric arc furnace and a waste heat boiler to perform vaporization cooling on flue gas and generate high-pressure steam, so that heat of high-temperature flue gas is fully recovered, the flue gas waste heat of the electric arc furnace is effectively utilized, energy is saved, and consumption is reduced; patent No. CN201820304403.9 is an electric arc furnace using waste heat, which collects heat energy generated when furnace liquid is discharged from the furnace by arranging a heat collecting cavity, and feeds the heat energy back to a feeding device for preheating newly added furnace burden, thereby reducing heat loss and improving the utilization rate of the waste heat; the technologies utilize the waste heat smoke of the electric arc furnace to achieve the effects of energy conservation and consumption reduction, but the application of the technologies in the aspect of metallized pellets is almost not realized.
The metallized pellet is a raw material for smelting in an electric arc furnace, is prepared by mixing and stirring mineral powder, a reducing agent and a flux in proportion, briquetting the mixture, feeding the mixture into kilns such as a rotary kiln, a tunnel kiln, a belt furnace, a shaft furnace and the like, heating the mixture by using natural gas, coal gas or microwaves, reducing the mixture into a pellet with high metallization rate, and cooling the pellet for steelmaking.
Disclosure of Invention
The invention aims to provide a process method for preparing metallized hot pellets by using waste heat of an electric arc furnace, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the process method for preparing the metallized hot pellets by using the waste heat of the electric arc furnace comprises the following steps:
the method comprises the following steps: selecting materials, namely selecting 70-90 parts of mineral powder, 9-25 parts of reducing agent and 1-5 parts of flux;
step two: mixing raw materials, namely putting the selected mineral powder, a reducing agent and a flux into a container for mixing;
step three: forming raw materials, namely conveying the mixed raw materials in the mixing container into a high-pressure ball press, and briquetting and forming the mixed raw materials by using the high-pressure ball press to prepare mineral powder pellets;
step four: preheating reduction, namely putting the mineral powder pellets formed by briquetting into a heating device, and preheating and reducing the mineral powder pellets formed by briquetting through a high-temperature environment in the heating device;
step five: conveying finished products, namely conveying the preheated and reduced mineral powder pellets to a fourth hole position of an electric arc furnace;
step six: the mineral powder pellets conveyed to the fourth hole position of the electric arc furnace enter the electric arc furnace to be melted with other steelmaking raw materials into molten steel.
As a further scheme of the invention: and a stirring device is arranged in the container.
As a still further scheme of the invention: and a discharge port of the heating device is connected with a fourth hole of the electric arc furnace through an expansion pipe.
As a still further scheme of the invention: and a negative pressure fan is arranged outside the heating device and the fourth hole of the electric arc furnace, and the negative pressure fan conveys high-temperature flue gas in the electric arc furnace into the heating device through the fourth hole of the electric arc furnace to be used as a heat source of the heating device.
Compared with the prior art, the invention has the beneficial effects that:
the invention mixes and stirs the mineral powder, reducing agent and flux according to the proportion, uses the high-pressure ball press to make the mineral powder, reducing agent and flux into high-pressure briquetting pellet, sends the high-pressure briquetting pellet into the pellet heating device, uses the negative pressure air exhaust fan to lead the high-temperature smoke generated when the electric arc furnace works into the pellet heating device from the fourth hole of the electric arc furnace, preheats and reduces the high-pressure briquetting pellet conveyed into the pellet heating device, so that the high-pressure briquetting pellet becomes the metallized hot pellet with the metallization rate of more than 80 percent and the self temperature of more than 800 ℃, and sends the metallized hot pellet into the electric arc furnace through the fourth hole of the electric arc furnace, and smelts into molten steel at the high temperature of the electric arc furnace, because the metallized hot pellet is put into the furnace under the hot state, the energy consumption of the ore-smelting furnace after the conventional cold-state metallized pellet is put into the furnace is reduced, and because the high-temperature smoke discharged from the, thereby reducing the energy consumption in the conventional metallized pellet manufacturing.
Drawings
FIG. 1 is a process flow diagram of a process for preparing metallized hot pellets by using waste heat of an electric arc furnace.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1, the process of manufacturing metallized hot pellets by using the waste heat of an electric arc furnace includes the following steps:
the method comprises the following steps: selecting materials, namely selecting 90 parts of mineral powder, 9 parts of reducing agent and 1 part of fusing agent;
step two: mixing raw materials, namely putting the selected mineral powder, a reducing agent and a flux into a container for mixing;
step three: forming raw materials, namely conveying the mixed raw materials in the mixing container into a high-pressure ball press, and briquetting and forming the mixed raw materials by using the high-pressure ball press to prepare mineral powder pellets;
step four: preheating reduction, namely putting the mineral powder pellets formed by briquetting into a heating device, and preheating and reducing the mineral powder pellets formed by briquetting through a high-temperature environment in the heating device;
step five: conveying finished products, namely conveying the preheated and reduced mineral powder pellets to a fourth hole position of an electric arc furnace;
step six: the mineral powder pellets conveyed to the fourth hole position of the electric arc furnace enter the electric arc furnace to be melted with other steelmaking raw materials into molten steel.
A stirring device is arranged in the container.
The discharge port of the heating device is connected with the fourth hole of the electric arc furnace through an expansion pipe.
And a negative pressure fan is arranged outside the heating device and the fourth hole of the electric arc furnace, and the negative pressure fan conveys high-temperature flue gas in the electric arc furnace into the heating device through the fourth hole of the electric arc furnace to be used as a heat source of the heating device.
And fifthly, the mineral powder pellets conveyed to the fourth hole of the electric arc furnace are metallized hot pellets with the metallization rate of more than 90% and the self temperature of more than 800 ℃.
The process method for preparing metallized hot pellets by using the waste heat of the electric arc furnace provides a new way for using high-temperature flue gas of the electric arc furnace, equipment adopted in the process flow is universal equipment, and technical parameters and functions of the equipment are not described one by one.
Example two:
referring to fig. 1, the process of manufacturing metallized hot pellets by using the waste heat of an electric arc furnace includes the following steps:
the method comprises the following steps: selecting materials, namely selecting 70 parts of mineral powder, 25 parts of reducing agent and 5 parts of flux;
step two: mixing raw materials, namely putting the selected mineral powder, a reducing agent and a flux into a container for mixing;
step three: forming raw materials, namely conveying the mixed raw materials in the mixing container into a high-pressure ball press, and briquetting and forming the mixed raw materials by using the high-pressure ball press to prepare mineral powder pellets;
step four: preheating reduction, namely putting the mineral powder pellets formed by briquetting into a heating device, and preheating and reducing the mineral powder pellets formed by briquetting through a high-temperature environment in the heating device;
step five: conveying finished products, namely conveying the preheated and reduced mineral powder pellets to a fourth hole position of an electric arc furnace;
step six: the mineral powder pellets conveyed to the fourth hole position of the electric arc furnace enter the electric arc furnace to be melted with other steelmaking raw materials into molten steel.
A stirring device is arranged in the container.
The discharge port of the heating device is connected with the fourth hole of the electric arc furnace through an expansion pipe.
And a negative pressure fan is arranged outside the heating device and the fourth hole of the electric arc furnace, and the negative pressure fan conveys high-temperature flue gas in the electric arc furnace into the heating device through the fourth hole of the electric arc furnace to be used as a heat source of the heating device.
And fifthly, the mineral powder pellets conveyed to the fourth hole of the electric arc furnace are metallized hot pellets with the metallization rate of more than 90% and the self temperature of more than 800 ℃.
The process method for preparing metallized hot pellets by using the waste heat of the electric arc furnace provides a new way for using high-temperature flue gas of the electric arc furnace, equipment adopted in the process flow is universal equipment, and technical parameters and functions of the equipment are not described one by one.
Example three:
referring to fig. 1, the process of manufacturing metallized hot pellets by using the waste heat of an electric arc furnace includes the following steps:
the method comprises the following steps: selecting materials, namely selecting 80 parts of mineral powder, 17 parts of reducing agent and 3 parts of flux;
step two: mixing raw materials, namely putting the selected mineral powder, a reducing agent and a flux into a container for mixing;
step three: forming raw materials, namely conveying the mixed raw materials in the mixing container into a high-pressure ball press, and briquetting and forming the mixed raw materials by using the high-pressure ball press to prepare mineral powder pellets;
step four: preheating reduction, namely putting the mineral powder pellets formed by briquetting into a heating device, and preheating and reducing the mineral powder pellets formed by briquetting through a high-temperature environment in the heating device;
step five: conveying finished products, namely conveying the preheated and reduced mineral powder pellets to a fourth hole position of an electric arc furnace;
step six: the mineral powder pellets conveyed to the fourth hole position of the electric arc furnace enter the electric arc furnace to be melted with other steelmaking raw materials into molten steel.
A stirring device is arranged in the container.
The discharge port of the heating device is connected with the fourth hole of the electric arc furnace through an expansion pipe.
And a negative pressure fan is arranged outside the heating device and the fourth hole of the electric arc furnace, and the negative pressure fan conveys high-temperature flue gas in the electric arc furnace into the heating device through the fourth hole of the electric arc furnace to be used as a heat source of the heating device.
And fifthly, the mineral powder pellets conveyed to the fourth hole of the electric arc furnace are metallized hot pellets with the metallization rate of more than 90% and the self temperature of more than 800 ℃.
The process method for preparing metallized hot pellets by using the waste heat of the electric arc furnace provides a new way for using high-temperature flue gas of the electric arc furnace, equipment adopted in the process flow is universal equipment, and technical parameters and functions of the equipment are not described one by one.
The working principle of the invention is as follows:
when in use, the mineral powder, the reducing agent and the flux are mixed and stirred uniformly according to the proportion, the mineral powder, the reducing agent and the flux which are mixed and stirred uniformly are made into high-pressure briquetting pellets by a high-pressure ball press, the high-pressure briquetting pellets are sent into a pellet heating device, high-temperature flue gas generated when an electric arc furnace works is introduced into the pellet heating device from a fourth hole of the electric arc furnace by a fan in a negative-pressure air extraction mode, the high-pressure briquetting pellets which are conveyed into the pellet heating device are preheated and reduced, so that the high-pressure briquetting pellets become metallized hot pellets with the metallization rate of more than 80 percent and the self temperature of more than 800 ℃, the metallized hot pellets are sent into the electric arc furnace through the fourth hole of the electric arc furnace, the high-temperature flue gas is quickly smelted into molten steel in the electric arc furnace at high temperature, because the metallized hot pellets are fed into the furnace in a hot state, the energy consumption of the ore furnace after the conventional cold-state metallized, thereby reducing the energy consumption in the conventional metallized pellet manufacturing.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (4)
1. The process method for preparing the metallized hot pellets by using the waste heat of the electric arc furnace is characterized by comprising the following steps of: the method comprises the following steps:
the method comprises the following steps: selecting materials, namely selecting 70-90 parts of mineral powder, 9-25 parts of reducing agent and 1-5 parts of flux;
step two: mixing raw materials, namely putting the selected mineral powder, a reducing agent and a flux into a container for mixing;
step three: forming raw materials, namely conveying the mixed raw materials in the mixing container into a high-pressure ball press, and briquetting and forming the mixed raw materials by using the high-pressure ball press to prepare mineral powder pellets;
step four: preheating reduction, namely putting the mineral powder pellets formed by briquetting into a heating device, and preheating and reducing the mineral powder pellets formed by briquetting through a high-temperature environment in the heating device;
step five: conveying finished products, namely conveying the preheated and reduced mineral powder pellets to a fourth hole position of an electric arc furnace;
step six: the mineral powder pellets conveyed to the fourth hole position of the electric arc furnace enter the electric arc furnace to be melted with other steelmaking raw materials into molten steel.
2. The process method for preparing metallized hot pellets by using the waste heat of the electric arc furnace as claimed in claim 1, which is characterized in that: and a stirring device is arranged in the container.
3. The process method for preparing metallized hot pellets by using the waste heat of the electric arc furnace as claimed in claim 1, which is characterized in that: and a discharge port of the heating device is connected with a fourth hole of the electric arc furnace through an expansion pipe.
4. The process method for preparing metallized hot pellets by using the waste heat of the electric arc furnace as claimed in claim 1, which is characterized in that: and a negative pressure fan is arranged outside the heating device and the fourth hole of the electric arc furnace, and the negative pressure fan conveys high-temperature flue gas in the electric arc furnace into the heating device through the fourth hole of the electric arc furnace to be used as a heat source of the heating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011044133.0A CN112410548A (en) | 2020-09-29 | 2020-09-29 | Process for preparing metallized hot pellets by using waste heat of electric arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011044133.0A CN112410548A (en) | 2020-09-29 | 2020-09-29 | Process for preparing metallized hot pellets by using waste heat of electric arc furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112410548A true CN112410548A (en) | 2021-02-26 |
Family
ID=74854808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011044133.0A Pending CN112410548A (en) | 2020-09-29 | 2020-09-29 | Process for preparing metallized hot pellets by using waste heat of electric arc furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112410548A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451344A (en) * | 2013-09-02 | 2013-12-18 | 北京科技大学 | CEO compound smelting reduction ironmaking plant and technology |
| CN103627836A (en) * | 2013-12-20 | 2014-03-12 | 中冶赛迪工程技术股份有限公司 | Steelmaking device and steelmaking method |
| CN104789726A (en) * | 2015-03-31 | 2015-07-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for separating iron, vanadium and titanium from vanadium-titanium magnetite |
| CN106282468A (en) * | 2016-09-13 | 2017-01-04 | 江苏省冶金设计院有限公司 | A kind of reduction reaction system and method for fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group |
-
2020
- 2020-09-29 CN CN202011044133.0A patent/CN112410548A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451344A (en) * | 2013-09-02 | 2013-12-18 | 北京科技大学 | CEO compound smelting reduction ironmaking plant and technology |
| CN103627836A (en) * | 2013-12-20 | 2014-03-12 | 中冶赛迪工程技术股份有限公司 | Steelmaking device and steelmaking method |
| CN104789726A (en) * | 2015-03-31 | 2015-07-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for separating iron, vanadium and titanium from vanadium-titanium magnetite |
| CN106282468A (en) * | 2016-09-13 | 2017-01-04 | 江苏省冶金设计院有限公司 | A kind of reduction reaction system and method for fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113582560B (en) | Method for calcining limestone by using low-calorific-value fuel in double-hearth kiln | |
| CN102701608A (en) | Limekiln coproduction device | |
| CN101445869A (en) | Method for manufacturing metallic pellets by direct reduction of oxygen-enriched combustion in rotary furnace | |
| CN104131127B (en) | RKEF technique nickel-iron smelting residual-heat utilization method | |
| CN105036134B (en) | Furnace of calcium carbide and the method for preparing calcium carbide | |
| CN107904347B (en) | Coal-based direct reduction shaft furnace and reduction method thereof | |
| CN105776218A (en) | Calcium carbide preparation system and method | |
| CN106119449B (en) | A kind of blast furnace whole world group smelting process | |
| CN107099659A (en) | The smelting system and method for a kind of mother liquor of stainless steel | |
| CN106244758A (en) | A kind of system and method efficiently utilizing body of heater fume afterheat to process iron-containing resource | |
| CN103352128A (en) | Direct zinc-coal mixing cyclone burning type zinc oxide production system | |
| CN112410548A (en) | Process for preparing metallized hot pellets by using waste heat of electric arc furnace | |
| CN101134985A (en) | Smelting-separating furnace iron-smelting method for coal radical metallized pellet reduction | |
| CN106282468B (en) | A kind of reduction reaction system and method for fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group | |
| CN105112606B (en) | A kind of steelmaking system | |
| CN114990336B (en) | Preheating reduction device and preheating reduction method | |
| CN204661791U (en) | Two-stage calcination method ore reduction volatilization interlock production system | |
| CN106191431B (en) | A kind of reduction reaction system and method for the aqueous pelletizing of lateritic nickel ore | |
| CN102776389B (en) | Method for using thermal-state magnesium slag afterheat | |
| CN209815974U (en) | Device for smelting magnesite with low power consumption | |
| CN208472137U (en) | A kind of low-grade Iron concentrate directly melts iron-smelting device | |
| CN112985064A (en) | Sintering device and sintering method based on plasma hot blast stove | |
| CN206069920U (en) | A kind of system for producing ferrochrome | |
| CN112280972A (en) | Process method for preparing metallized hot pellets by waste heat of submerged arc furnace | |
| CN112080649A (en) | Process for smelting ferronickel from laterite-nickel ore under high power of submerged arc furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210226 |
|
| RJ01 | Rejection of invention patent application after publication |