CN113564305A - Method for recycling and reusing dust in electric furnace steelmaking - Google Patents
Method for recycling and reusing dust in electric furnace steelmaking Download PDFInfo
- Publication number
- CN113564305A CN113564305A CN202110782372.4A CN202110782372A CN113564305A CN 113564305 A CN113564305 A CN 113564305A CN 202110782372 A CN202110782372 A CN 202110782372A CN 113564305 A CN113564305 A CN 113564305A
- Authority
- CN
- China
- Prior art keywords
- fly ash
- electric furnace
- pellets
- steelmaking
- furnace steelmaking
- 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
- 238000009628 steelmaking Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004064 recycling Methods 0.000 title claims abstract description 18
- 239000000428 dust Substances 0.000 title claims abstract description 12
- 239000010881 fly ash Substances 0.000 claims abstract description 57
- 239000008188 pellet Substances 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 7
- 239000001301 oxygen Substances 0.000 claims abstract description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 4
- 239000011230 binding agent Substances 0.000 claims abstract description 4
- 238000007664 blowing Methods 0.000 claims abstract description 4
- 239000004571 lime Substances 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims abstract description 4
- 238000005453 pelletization Methods 0.000 claims 1
- 238000003723 Smelting Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000002893 slag Substances 0.000 abstract description 2
- 239000002956 ash Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010908 plant waste Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- C21C5/527—Charging of the electric furnace
-
- 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
- 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
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a recycling method of fly ash in electric furnace steelmaking, which comprises the steps of preparing fly ash pellets from fly ash by using water as a binder, controlling the water addition amount to be 8-10% and controlling the particle size to be 1-30 mu m; placing the prepared fly ash pellets into a material tray for baking, controlling the loading thickness to be less than or equal to 40cm, controlling the baking firepower to be small fire, controlling the baking time to be 6-8 h, and baking until the moisture in the fly ash pellets is less than or equal to 1%; in the electric furnace steelmaking process, when the last tank of scrap steel material is added, the fly ash pellets and lime are uniformly mixed and added into an electric furnace to serve as slag forming materials, and then strong oxygen blowing operation is carried out to carry out steelmaking, wherein the adding amount of the fly ash pellets in the electric furnace steelmaking process is controlled to be 8-12 kg/ton of steel. The recycling method of the dust in the electric furnace steelmaking can avoid the influence of the dust delivery on the environment, save the cost for treating the dust, reduce the consumption of oxygen in the electric furnace smelting process and save the steelmaking production cost.
Description
Technical Field
The invention belongs to the technical field of recycling of steel plant wastes, and particularly relates to a recycling method of dust in electric furnace steelmaking.
Background
At present, the fly ash generated in the process of electric furnace steelmaking is stored by a special ash storage bin and is sent out of a factory for treatment regularly according to the requirement of wastes.
The treatment method in the prior art has the following defects:
1. the storage capacity of the dust removal ash storage bin is limited, and if the dust removal ash storage bin cannot be sent out of a factory on time, the workshop can be stopped;
2. the dust removal dust is seriously polluted in the process of outward conveying, and does not meet the national environmental protection requirements on enterprises.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and provides a method for recycling and reusing dust in electric furnace steelmaking, which comprises the following steps:
preparing the fly ash into fly ash pellets by using water as a binder, controlling the water addition amount to be 8-10% of the weight of the fly ash pellets, and controlling the particle size of the fly ash pellets to be 1-30 mu m;
placing the prepared fly ash pellets in a material tray for baking until the moisture in the fly ash pellets is less than or equal to 1%;
in the process of electric furnace steelmaking, when the last tank of scrap steel material is added, the fly ash pellets and lime are uniformly mixed and added into an electric furnace, and then strong oxygen blowing operation is carried out to carry out steelmaking.
Preferably, in the recycling method of the fly ash in the electric furnace steelmaking, the fly ash pellets are manufactured by a disc ball manufacturing machine, and the ball manufacturing time is controlled within 12-18 min.
Preferably, in the method for recycling the fly ash in the electric furnace steelmaking, the loading thickness of the fly ash pellets in a tray is controlled to be less than or equal to 40cm, the baking fire is controlled to be small fire, and the baking time is controlled to be 6-8 h.
Preferably, in the recycling method of the fly ash in the electric furnace steelmaking, the adding amount of the fly ash pellets in the electric furnace steelmaking process is controlled to be 8-12 kg/ton of steel.
The method for recycling the fly ash in the electric furnace steelmaking has the following beneficial effects:
the method for recycling the fly ash in the electric furnace steelmaking effectively and reasonably recycles the fly ash in the electric furnace steelmaking, can avoid the influence of the outward delivery of the fly ash on the environment, saves the cost for treating the fly ash, and makes the fly ash into fly ash pellets to be used as slagging materials in the electric furnace smelting, reduces the consumption of oxygen in the electric furnace smelting process and saves the steelmaking production cost.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The method for recycling the fly ash in the electric furnace steelmaking comprises the following steps:
preparing the fly ash into fly ash pellets by using a disc ball making machine and water as a binder, wherein the ball making time is controlled to be 12-18 min, the water adding amount is controlled to be 8-10% of the weight of the fly ash pellets, and the particle size of the fly ash pellets is controlled to be 1-30 mu m;
placing the prepared fly ash pellets in a material tray for baking, controlling the loading thickness of the fly ash pellets in the material tray to be less than or equal to 40cm, controlling the baking fire to be small fire, controlling the baking time to be 6-8 h, and baking until the moisture in the fly ash pellets is less than or equal to 1%;
in the electric furnace steelmaking process, when the last tank of scrap steel material is added, the fly ash pellets and lime are uniformly mixed and added into an electric furnace to serve as slag forming materials, and then strong oxygen blowing operation is carried out to carry out steelmaking, wherein the adding amount of the fly ash pellets in the electric furnace steelmaking process is controlled to be 8-12 kg/ton of steel.
The method for recycling the fly ash in the electric furnace steelmaking effectively and reasonably recycles the fly ash in the electric furnace steelmaking, can avoid the influence of the outward delivery of the fly ash on the environment, saves the cost for treating the fly ash, and makes the fly ash into fly ash pellets to be used as slagging materials in the electric furnace smelting, reduces the consumption of oxygen in the electric furnace smelting process and saves the steelmaking production cost.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. A method for recycling and reusing dust in electric furnace steelmaking is characterized by comprising the following steps:
preparing the fly ash into fly ash pellets by using water as a binder, controlling the water addition amount to be 8-10% of the weight of the fly ash pellets, and controlling the particle size of the fly ash pellets to be 1-30 mu m;
placing the prepared fly ash pellets in a material tray for baking until the moisture in the fly ash pellets is less than or equal to 1%;
in the process of electric furnace steelmaking, when the last tank of scrap steel material is added, the fly ash pellets and lime are uniformly mixed and added into an electric furnace, and then strong oxygen blowing operation is carried out to carry out steelmaking.
2. The recycling method of fly ash in electric furnace steelmaking according to claim 1, wherein fly ash pellets are produced by a disk pelletizer, and the pelletizing time is controlled within 12-18 min.
3. The method for recycling the fly ash in the electric furnace steelmaking according to claim 1, wherein the loading thickness of the fly ash pellets in the tray is controlled to be less than or equal to 40cm, the baking fire is controlled to be small fire, and the baking time is controlled to be 6-8 hours.
4. The method for recycling the fly ash in the electric furnace steelmaking according to claim 1, wherein the amount of the fly ash pellets added in the electric furnace steelmaking process is controlled to 8 to 12kg per ton of steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110782372.4A CN113564305A (en) | 2021-07-12 | 2021-07-12 | Method for recycling and reusing dust in electric furnace steelmaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110782372.4A CN113564305A (en) | 2021-07-12 | 2021-07-12 | Method for recycling and reusing dust in electric furnace steelmaking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113564305A true CN113564305A (en) | 2021-10-29 |
Family
ID=78164526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110782372.4A Pending CN113564305A (en) | 2021-07-12 | 2021-07-12 | Method for recycling and reusing dust in electric furnace steelmaking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113564305A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101067180A (en) * | 2007-06-09 | 2007-11-07 | 山西太钢不锈钢股份有限公司 | Chronium-nickel alloy element electric furnace smelting recovery method from stainless steel dedusting ash |
| WO2008131614A1 (en) * | 2007-04-30 | 2008-11-06 | Zhengzhou Yongtong Special Steel Co., Ltd. | A SMELTING METHOD OF LOW-P STAINLESS STEEL BASE USING LOW-GRADE IRONSTONE CONTAINING Ni AND Cr |
| CN101705333A (en) * | 2009-11-28 | 2010-05-12 | 山西太钢不锈钢股份有限公司 | Reduction and utilization method of dedusting ash of stainless steel |
| CN105219954A (en) * | 2014-06-30 | 2016-01-06 | 宝钢不锈钢有限公司 | A kind of recoverying and utilizing method of dedusting ash of stainless steel |
| CN105219919A (en) * | 2015-09-25 | 2016-01-06 | 宝钢不锈钢有限公司 | A kind of profit useless type stainless steel electric furnace foaming slag former and using method thereof |
-
2021
- 2021-07-12 CN CN202110782372.4A patent/CN113564305A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008131614A1 (en) * | 2007-04-30 | 2008-11-06 | Zhengzhou Yongtong Special Steel Co., Ltd. | A SMELTING METHOD OF LOW-P STAINLESS STEEL BASE USING LOW-GRADE IRONSTONE CONTAINING Ni AND Cr |
| CN101067180A (en) * | 2007-06-09 | 2007-11-07 | 山西太钢不锈钢股份有限公司 | Chronium-nickel alloy element electric furnace smelting recovery method from stainless steel dedusting ash |
| CN101705333A (en) * | 2009-11-28 | 2010-05-12 | 山西太钢不锈钢股份有限公司 | Reduction and utilization method of dedusting ash of stainless steel |
| CN105219954A (en) * | 2014-06-30 | 2016-01-06 | 宝钢不锈钢有限公司 | A kind of recoverying and utilizing method of dedusting ash of stainless steel |
| CN105219919A (en) * | 2015-09-25 | 2016-01-06 | 宝钢不锈钢有限公司 | A kind of profit useless type stainless steel electric furnace foaming slag former and using method thereof |
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| 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211029 |