CN114107581A - Steel slag recycling device and method - Google Patents

Steel slag recycling device and method Download PDF

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Publication number
CN114107581A
CN114107581A CN202111363683.3A CN202111363683A CN114107581A CN 114107581 A CN114107581 A CN 114107581A CN 202111363683 A CN202111363683 A CN 202111363683A CN 114107581 A CN114107581 A CN 114107581A
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CN
China
Prior art keywords
steel slag
fan
cooling
slag
dust collector
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
Application number
CN202111363683.3A
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Chinese (zh)
Inventor
张良成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sichuan Tongda Renewable Resources Comprehensive Utilization Co ltd
Original Assignee
Sichuan Tongda Renewable Resources Comprehensive Utilization Co ltd
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Publication date
Application filed by Sichuan Tongda Renewable Resources Comprehensive Utilization Co ltd filed Critical Sichuan Tongda Renewable Resources Comprehensive Utilization Co ltd
Priority to CN202111363683.3A priority Critical patent/CN114107581A/en
Publication of CN114107581A publication Critical patent/CN114107581A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B3/00General features in the manufacture of pig-iron
    • C21B3/04Recovery of by-products, e.g. slag
    • C21B3/06Treatment of liquid slag
    • C21B3/08Cooling slag
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00Disintegrating plant with or without drying of the material
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04Waste materials; Refuse
    • C04B18/14Waste materials; Refuse from metallurgical processes
    • C04B18/141Slags
    • C04B18/142Steelmaking slags, converter slags
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00Hydraulic cements
    • C04B7/14Cements containing slag
    • C04B7/147Metallurgical slag
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B3/00General features in the manufacture of pig-iron
    • C21B3/04Recovery of by-products, e.g. slag
    • C21B3/06Treatment of liquid slag
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B2400/00Treatment of slags originating from iron or steel processes
    • C21B2400/02Physical or chemical treatment of slags
    • C21B2400/022Methods of cooling or quenching molten slag
    • C21B2400/026Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B2400/00Treatment of slags originating from iron or steel processes
    • C21B2400/08Treatment of slags originating from iron or steel processes with energy recovery
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement, e.g. improving or optimising the production methods; Cement grinding
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Civil Engineering (AREA)
  • Food Science & Technology (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

The invention discloses a steel slag recycling device and a method, wherein the device comprises: the device comprises cooling equipment, a cyclone cylinder, a vertical mill, a dust collector, a chimney, a first fan, a second fan and a third fan; the cooling equipment is sequentially connected with the cyclone cylinder, the second fan, the vertical mill, the dust collector, the third fan and the chimney; the first fan is provided with a plurality of and all is connected with the cooling equipment. The cooling equipment is adopted to forcibly cool the high-temperature steel slag discharged from the steel mill, the cooled steel slag is dried by hot air to grind materials, and steel slag quenching can improve the grindability and activity of the steel slag, improve the activity of the steel slag, reduce the consumption of cement clinker, save the cost, improve the recycling efficiency of the steel slag, solve the problem of steel slag disposal and reduce the cooling water consumption of enterprises.

Description

Steel slag recycling device and method
Technical Field
The invention relates to the technical field of steel slag treatment, in particular to a method for recycling steel slag.
Background
The steel slag is waste slag in a steel making process, the main components of the steel slag are ferric oxide, calcium oxide, magnesium oxide, silicon oxide and manganese oxide, the main mineral components are tricalcium silicate, dicalcium silicate and the like, the waste cement clinker is called, the steel slag is in a liquid state when being discharged from an electric furnace, the temperature is up to 1200 ℃, watering cooling and natural cooling are adopted at present, a large amount of waste heat is wasted, meanwhile, the activity of the steel slag is reduced due to natural cooling of the steel slag, the grindability is poor, the utilization rate of the domestic steel slag is only 20 percent at present, the steel slag cannot be timely treated, a large amount of land resources are occupied, the environment is polluted, the steel slag is a resource which is misplaced, and the comprehensive utilization of the steel slag has important significance for enterprises and society.
Therefore, it is an urgent need to solve the technical problem of the art to provide a steel slag recycling device and method that will not generate secondary pollution, have good steel slag cooling effect, and can improve the utilization rate of steel slag.
Disclosure of Invention
In view of this, the invention provides a steel slag recycling device and method capable of improving steel slag activity, improving steel slag grindability and further improving steel slag utilization rate.
In order to achieve the purpose, the invention adopts the following technical scheme:
a steel slag recycling device comprises: the device comprises cooling equipment, a cyclone cylinder, a vertical mill, a dust collector, a chimney, a first fan, a second fan and a third fan;
the cooling equipment is sequentially connected with the cyclone cylinder, the second fan, the vertical mill, the dust collector, the third fan and the chimney;
the first fan is provided with a plurality of, and all with cooling arrangement connects.
Preferably, the steel slag recycling device comprises a first conveying device and a second conveying device;
the first conveying device is respectively connected with the cooling equipment and the cyclone cylinder;
and the second conveying device is connected with the dust collector.
Preferably, the cooling apparatus includes: grate coolers, single-cylinder coolers or ring coolers.
Another object of the present invention is to provide a steel slag recycling method using the above steel slag recycling apparatus, comprising the steps of:
(1) conveying high-temperature steel slag generated in the steelmaking furnace to crushing equipment through a slag tanker, and crushing and extruding to obtain slag;
(2) the slag is sent to a cooling device, the cooling device blows air to cool the slag, and cooled steel slag generated by cooling of the cooling device enters a first conveying device through a discharge hole of the cooling device and is sent to a storage yard for storage;
(3) the dusty gas generated in the cooling equipment enters a cyclone for further treatment, light components generated in the cyclone are pumped into a vertical mill through a second fan, and the heavy components fall into a first conveying device below and are conveyed to a storage yard for storage;
(4) and (3) drying the light components in the vertical mill, then sending the light components into a dust collector for further treatment, discharging clean air treated by the dust collector from a chimney, and sending the finished product materials into a finished product bin for storage through a second conveying device.
Preferably, the method also comprises the step of pumping hot air (300-.
Preferably, the hot air generated by the cooling device can be used for waste heat power generation.
Preferably, the temperature of the high-temperature steel slag in the step (1) is 600-.
Through the technical scheme, compared with the prior art, the invention has the following beneficial effects:
the cooling equipment is adopted to forcibly cool the high-temperature steel slag discharged from the steel mill, the cooled steel slag is dried by hot air to grind materials, and the quenching of the steel slag can improve the grindability and activity of the steel slag, improve the activity of the steel slag, reduce the consumption of cement clinker, save the cost, improve the recycling efficiency of the steel slag, solve the problem of steel slag disposal, reduce the water consumption for cooling enterprises, and simultaneously, the heat energy generated by cooling the steel slag can be used for waste heat power generation and the like, thereby further improving the economic benefit.
The hot air generated by cooling the steel slag is utilized to dry the vertical mill material, the natural gas is saved by 736 ten thousand meters every year3Saving cost 1503 ten thousand yuan per year and saving water consumption for cooling 1200 ten thousand m3The annual cost is saved by 240 ten thousand yuan, the grindability of the steel slag is improved, and a vertical mill and a roller are improvedThe press is worn, the annual maintenance cost is saved by 100 ten thousand yuan, the activity of the steel slag is improved, the mixing amount of the steel slag powder is improved, the consumption of cement clinker is reduced, the carbon emission is reduced, and the environment-friendly and social benefits are good.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of a steel slag recycling device according to the present invention;
wherein, 1-a cooling device; 2-a cyclone cylinder; 3-a second fan; 4-vertical grinding; 5-a dust collector; 6-a third fan; 7-a chimney; 8-a first fan; 9-a first conveying device; 10-a second conveying device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
Example 1
A steel slag recycling device comprises cooling equipment 1, a cyclone cylinder 2, a second fan 3, a vertical mill 4, a dust collector 5, a chimney 6, a first fan 7, a first fan 8, a first conveying device 9 and a second conveying device 10;
the cooling device 1 is sequentially connected with the cyclone cylinder 2, the second fan 3, the vertical mill 4, the dust collector 5, the third fan 6 and the chimney 7;
the first fan 8 is provided with a plurality of and all is connected with the cooling device 1.
The first conveying device 9 is respectively connected with the cooling device 1 and the cyclone 2;
the second conveying device 10 is connected to the dust collector 5.
Example 2
A method for recycling steel slag comprises the following steps:
(1) conveying high-temperature steel slag generated in the steelmaking furnace to crushing equipment through a slag tanker, and crushing and extruding to obtain slag;
(2) the slag is sent to a cooling device, the cooling device blows air to cool the slag, and cooled steel slag generated by cooling of the cooling device enters a conveying device through a discharge hole of the cooling device and is sent to a storage yard to be stored;
(3) the dusty gas generated in the cooling equipment enters a cyclone for further treatment, light components generated in the cyclone are pumped into a vertical mill through a second fan, and the heavy components fall into a conveying device below and are conveyed to a storage yard for storage;
(4) and (3) drying the light components in the vertical mill, then sending the light components into a dust collector for further treatment, discharging clean air treated by the dust collector from a chimney, and sending finished product materials into a finished product bin for storage through a lifting device.
In order to further optimize the technical scheme, hot air (300-.
In order to further optimize the technical scheme, the temperature of the high-temperature steel slag in the step (1) is 600-1200 ℃.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. A steel slag recycling device is characterized by comprising: the device comprises cooling equipment, a cyclone cylinder, a vertical mill, a dust collector, a chimney, a first fan, a second fan and a third fan;
the cooling equipment is sequentially connected with the cyclone cylinder, the second fan, the vertical mill, the dust collector, the third fan and the chimney;
the first fan is provided with a plurality of, and all with cooling arrangement connects.
2. The steel slag recycling device according to claim 1, further comprising: a first conveyor and a second conveyor;
the first conveying device is respectively connected with the cooling equipment and the cyclone cylinder;
and the second conveying device is connected with the dust collector.
3. The steel slag recycling device according to claim 2, wherein the cooling apparatus comprises: grate coolers, single-cylinder coolers or ring coolers.
4. A steel slag recycling method using the steel slag recycling device of claim 3, comprising the steps of:
(1) conveying high-temperature steel slag generated in the steelmaking furnace to crushing equipment through a slag tanker, and crushing and extruding to obtain slag;
(2) the slag is sent to a cooling device, the cooling device blows air to cool the slag, and cooled steel slag generated by cooling of the cooling device enters a first conveying device through a discharge hole of the cooling device and is sent to a storage yard for storage;
(3) the dusty gas generated in the cooling equipment enters a cyclone for further treatment, light components generated in the cyclone are pumped into a vertical mill through a second fan, and the heavy components fall into a first conveying device below and are conveyed to a storage yard for storage;
(4) and (3) drying the light components in the vertical mill, then sending the light components into a dust collector for further treatment, discharging clean air treated by the dust collector from a chimney, and sending the finished product materials into a finished product bin for storage through a second conveying device.
5. The recycling method of steel slag according to claim 4, further comprising the step of sucking hot air generated by the cooling device into the vertical mill through the second fan and the third fan for drying the materials.
6. The recycling method of steel slag as claimed in claim 4, wherein the temperature of the high temperature steel slag in step (1) is 600-1200 ℃.
CN202111363683.3A 2021-11-17 2021-11-17 Steel slag recycling device and method Pending CN114107581A (en)

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CN202111363683.3A CN114107581A (en) 2021-11-17 2021-11-17 Steel slag recycling device and method

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116716443A (en) * 2023-08-11 2023-09-08 包钢集团节能环保科技产业有限责任公司 Method for comprehensively utilizing thermal-state steel slag and comprehensive separation system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE717894A (en) * 1967-07-10 1969-01-10
CN102179272A (en) * 2011-01-07 2011-09-14 重庆京庆重型机械有限公司 Final grinding system of rolling machine in steel slag and mineral slag micropowder production line
CN208517288U (en) * 2018-05-03 2019-02-19 湖北俊天电建工程有限公司 The processing unit of building brick raw material steel slag
CN111850193A (en) * 2020-08-04 2020-10-30 中冶节能环保有限责任公司 Online quenching and tempering device and method for slag discharging and cooling process of molten steel slag
CN111998667A (en) * 2020-07-16 2020-11-27 安徽上峰杰夏环保科技有限责任公司 Bypass air discharging system for cement kiln co-processing
CN112934378A (en) * 2021-01-28 2021-06-11 天津水泥工业设计研究院有限公司 Preparation system for producing building material products by gradient utilization of hot stuffy steel slag

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE717894A (en) * 1967-07-10 1969-01-10
CN102179272A (en) * 2011-01-07 2011-09-14 重庆京庆重型机械有限公司 Final grinding system of rolling machine in steel slag and mineral slag micropowder production line
CN208517288U (en) * 2018-05-03 2019-02-19 湖北俊天电建工程有限公司 The processing unit of building brick raw material steel slag
CN111998667A (en) * 2020-07-16 2020-11-27 安徽上峰杰夏环保科技有限责任公司 Bypass air discharging system for cement kiln co-processing
CN111850193A (en) * 2020-08-04 2020-10-30 中冶节能环保有限责任公司 Online quenching and tempering device and method for slag discharging and cooling process of molten steel slag
CN112934378A (en) * 2021-01-28 2021-06-11 天津水泥工业设计研究院有限公司 Preparation system for producing building material products by gradient utilization of hot stuffy steel slag

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周长波等, 中国环境出版集团 *
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116716443A (en) * 2023-08-11 2023-09-08 包钢集团节能环保科技产业有限责任公司 Method for comprehensively utilizing thermal-state steel slag and comprehensive separation system
CN116716443B (en) * 2023-08-11 2023-10-20 包钢集团节能环保科技产业有限责任公司 Method for comprehensively utilizing thermal-state steel slag and comprehensive separation system

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Application publication date: 20220301