CN102492792A - Molten steel slag tempering and modifying processing method - Google Patents
Molten steel slag tempering and modifying processing method Download PDFInfo
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- CN102492792A CN102492792A CN2011103986080A CN201110398608A CN102492792A CN 102492792 A CN102492792 A CN 102492792A CN 2011103986080 A CN2011103986080 A CN 2011103986080A CN 201110398608 A CN201110398608 A CN 201110398608A CN 102492792 A CN102492792 A CN 102492792A
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- slag
- molten steel
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- 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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Abstract
The invention relates to a molten steel slag tempering and modifying processing method which comprises the following steps: pouring 1500-1700 DEG C molten steel slag discharged from converter steel-making into a slag ladle insulating process, and meanwhile, adding lime powder and 1400-1550 DEG C blast furnace iron-making slag as tempering agents into the slag ladle, wherein the blast furnace iron-making slag accounts for 1-50% of the total mass of the molten steel slag, and the lime accounts for 1-30% of the total mass of the steel slag; the blast furnace iron-making slag comprises the following components in percentage by mass: 25-45% of SiO2, 30-50% of CaO, 5-20% of Al2O3, 0.01-5% of Fe2O3 and 0.01-10% of MgO; the lime powder comprises the following components in percentage by mass: 90-99.9% of CaO and 0.01-10% of MgO; and the particle size of the lime powder is 1.0-10mm. The invention has the advantage of low cost, enhances the water hardening activity of the steel slag, and lowers the iron oxide content in the steel slag.
Description
Technical field
The invention belongs to slag processing technology field in the metallurgical industry, be specifically related to the modified modification processing method of a kind of molten steel slag.
Background technology
Along with the fast development of China's modernization construction, iron and steel output is constantly soaring, and the slag amount of corresponding discharge also continues to increase.Chinese crude steel output was 6.27 hundred million tons in 2010, produced more than 100,000,000 ton in slag, and present Chinese slag effective rate of utilization only about 40%, big steel slag is piled up and is not only occupied cultivated land, and causes the wasting of resources and environmental pollution.
Cause the low major cause of steel slag utilization rate to have two: the one, free calcium oxide content is high in the slag, causes in the application stability bad; The 2nd, the slag gelation activity is poor, and aquation is slow, is difficult to be spiked in the cement in a large number use.Hot application method, slag stewing method, water quenching etc. are mainly adopted in the processing of present hot bessemer furnace slag, and these treatment processs only can partly be cleared up the free calcium oxide in the slag, but can't improve the slag gelation activity.
The slag temperature that converter steelmaking is discharged is about 1600 ℃; The slag temperature that blast furnace ironmaking is discharged is at 1400～1550 ℃; The sensible heat that slag per ton contains is equivalent to the heat of 50～70kg standard coal equivalent; Nearly 200,000,000 tons of China's discharge in year bessemer furnace slag and slag carry heat and are equivalent to more than 1,000 ten thousand tons of standard coal equivalents.Blast-furnace slag adopts the shrend cooling to produce grain slag more than 90% at present, and the slag heat is basic all to be scattered and disappeared, and wastes great lot of water resources in the process of cooling.Because cost problem slag sensible heat utilization rate is also very low, caused the huge waste of heat energy.Make full use of slag and scoriaceous sensible heat, energy-saving and cost-reducing significant to the efficient utilization that realizes the resource and the energy, reduction iron and steel enterprise.
The slag gelation activity is very low, and major cause is that wherein hydraulically active mineral content is low, compares CaO, SiO in the slag with the Portland clinker chemical constitution
2, Al
2O
3Content is lower, Fe
2O
3Content is higher, and SiO in the slag
2, Al
2O
3Content is higher, adds the content that lime improves CaO again, and the chemical constitution of slag is close with the Portland clinker composition after the modification, and it is also close that high temperature reacts the mineral composition that generates down, therefore can well improve the gelation activity of slag.
Summary of the invention
In order to overcome the deficiency of above-mentioned prior art, the object of the present invention is to provide the modified modification processing method of a kind of molten steel slag, it can solve steel slag stability and active low problem simultaneously, and technology is simple, and is with low cost.
To achieve these goals, the technical scheme of the present invention's employing is:
The modified modification processing method of a kind of molten steel slag; 1500～1700 ℃ of molten steel slags that converter steelmaking is discharged pour in the insulation cinder ladle process; Blast furnace ironmaking slag with lime powder and 1400～1550 ℃ adds in the cinder ladle as adjusting material simultaneously; The scoriaceous add-on of blast furnace ironmaking is 1～50% of a molten steel slag total mass, and the lime powder add-on is 1～30% of a slag total mass.
Scoriaceous composition of said blast furnace ironmaking and mass range are: SiO
2: 25～45%, CaO:30～50%, Al
2O
3: 5～20%, Fe
2O
3: 0.01～5%, MgO:0.01～10%.
The composition of said lime powder and mass range are: CaO:90～99.99%, MgO:0.01～10%, particle diameter are 1.0～10mm.
Said lime powder sprays in the cinder ladle through the strength spray feed.
After said adjusting material adds cinder ladle, insulation 30～60min under Current Temperatures.
Adjusting material adds in the cinder ladle process, and the cinder ladle bottom blasts nitrogen and stirs, and continues to the insulation end.
In the hot steel slag treating processes, add hot slag and lime adjusting material that blast furnace ironmaking produces, not only can make full use of slag and scoriaceous sensible heat; And can effectively reduce free calcium oxide content in the slag; Change slag composition and mineral composition, improve the slag gelling property, the slag chemical constitution after modified is near Portland clinker; Thereby increase the admixture usage quantity of slag greatly, improve the steel slag utilization rate in the cement concrete field.
Bessemer furnace slag and slag are all from iron and steel enterprise among the present invention, and adjusting material lime also uses in iron and steel enterprise in a large number, convenient transportation; With low cost, the modified modification process of fusion bessemer furnace slag is simple, and is easy to operate; Make full use of slag and scoriaceous thermal source, saved the slag Water Quenching.Slag and slag, lime powder thorough mixing in the insulation cinder ladle; Slag mesosilicic acid two calcium absorption quicklime generate tricalcium silicate; Scoriaceous adding promotes active higher iron phase sosoloid to generate, thereby has improved the slag hydraulically active, has reduced iron oxide content in the slag simultaneously.The insulation of grace time makes that free quicklime is fully absorbed in the slag, has eliminated the bad influence that slag is used of steel slag stability.
Embodiment
Below in conjunction with embodiment the present invention is explained further details.
Embodiment one
The modified modification processing method of a kind of molten steel slag; Pour in the process of insulation cinder ladle at 1600 ℃ of molten steel slags that converter steelmaking is discharged; The blast furnace ironmaking slag that adds simultaneously lime powder and 1450 ℃ as adjusting material; The scoriaceous add-on of blast furnace ironmaking is 10% of a molten steel slag total mass, and the lime powder add-on is 10% of a slag total mass.Wherein, lime powder sprays in the cinder ladle through the strength spray feed, and its chemical ingredients and mass percent are: CaO:90%, and MgO:10%, the median size of lime powder is 5mm; Scoriaceous chemical ingredients of blast furnace ironmaking and mass percent are: SiO
2: 25%, CaO:40%, Al
2O
3: 20%, Fe
2O
3: 5%, MgO:10%.After adjusting material added cinder ladle, insulation 60min under Current Temperatures.Adjusting material adds in the cinder ladle process, and the cinder ladle bottom blasts nitrogen and stirs, and continues to the insulation end.Obtain modified modified steel scoria gelling material after the cooling.
Embodiment two
The modified modification processing method of a kind of molten steel slag; Pour in the insulation cinder ladle process at 1600 ℃ of molten steel slags that converter steelmaking is discharged; The blast furnace ironmaking slag that adds simultaneously lime powder and 1400 ℃ as adjusting material; The scoriaceous add-on of blast furnace ironmaking is 8% of a molten steel slag total mass, and the lime powder add-on is 8% of a slag total mass.Wherein, lime powder sprays in the cinder ladle through the strength spray feed, and its chemical ingredients and mass percent are: CaO:95%, MgO:5%, the median size 5mm of lime powder; Scoriaceous chemical ingredients of blast furnace ironmaking and mass percent are: SiO
2: 40%, CaO:40%, Al
2O
3: 10%, Fe
2O
3: 5%, MgO:5%.After adjusting material added cinder ladle, insulation 30min under Current Temperatures.Adjusting material adds in the cinder ladle process, and the cinder ladle bottom blasts nitrogen and stirs, and continues to the insulation end.Obtain modified modified steel scoria gelling material after the cooling.
Embodiment three
The modified modification processing method of a kind of molten steel slag; 1700 ℃ of molten steel slags that converter steelmaking is discharged pour in the insulation cinder ladle process; The blast furnace ironmaking slag that adds simultaneously lime powder and 1500 ℃ as adjusting material; The scoriaceous add-on of blast furnace ironmaking is 6% of a molten steel slag total mass, and the lime powder add-on is 7% of a slag total mass.Wherein, lime powder sprays in the cinder ladle through the strength spray feed, and its chemical ingredients and mass percent are: CaO:99%, MgO:1%, the median size 5mm of lime powder; Scoriaceous chemical ingredients of blast furnace ironmaking and mass percent are: SiO
2: 35%, CaO:50%, Al
2O
3: 5%, Fe
2O
3: 3%, MgO:7%.After adjusting material added cinder ladle, insulation 40min under Current Temperatures.Adjusting material adds in the cinder ladle process, and the cinder ladle bottom blasts nitrogen and stirs, and continues to the insulation end.Obtain modified modified steel scoria gelling material after the cooling.
Embodiment four
The modified modification processing method of a kind of molten steel slag; 1550 ℃ of molten steel slags that converter steelmaking is discharged pour in the insulation cinder ladle process; The blast furnace ironmaking slag that adds simultaneously lime powder and 1550 ℃ as adjusting material; The scoriaceous add-on of blast furnace ironmaking is 25% of a molten steel slag total mass, and the lime powder add-on is 20% of a slag total mass.Wherein, lime powder sprays in the cinder ladle through the strength spray feed, and its chemical ingredients and mass percent are: CaO:97%, MgO:3%, the median size 10mm of lime powder; Scoriaceous chemical ingredients of blast furnace ironmaking and mass percent are: SiO
2: 40%, CaO:35%, Al
2O
3: 20%, Fe
2O
3: 1%, MgO:4%.After adjusting material added cinder ladle, insulation 60min under Current Temperatures.Adjusting material adds in the cinder ladle process, and the cinder ladle bottom blasts nitrogen and stirs, and continues to the insulation end.Obtain modified modified steel scoria gelling material after the cooling.
Embodiment five
The modified modification processing method of a kind of molten steel slag; 1700 ℃ of molten steel slags that converter steelmaking is discharged pour in the insulation cinder ladle process; The blast furnace ironmaking slag that adds simultaneously lime powder and 1450 ℃ as adjusting material; The scoriaceous add-on of blast furnace ironmaking is 50% of a molten steel slag total mass, and the lime powder add-on is 30% of a slag total mass.Wherein, lime powder sprays in the cinder ladle through the strength spray feed, and its chemical ingredients and mass percent are: CaO:92%, MgO:8%, the median size 1mm of lime powder; Scoriaceous chemical ingredients of blast furnace ironmaking and mass percent are: SiO
2: 40%, CaO:40%, Al
2O
3: 15%, Fe
2O
3: 1%, MgO:4%.After adjusting material added cinder ladle, insulation 60min under Current Temperatures.Adjusting material adds in the cinder ladle process, and the cinder ladle bottom blasts nitrogen and stirs, and continues to the insulation end.Obtain modified modified steel scoria gelling material after the cooling.
Embodiment six
The modified modification processing method of a kind of molten steel slag; 1700 ℃ of molten steel slags that converter steelmaking is discharged pour in the insulation cinder ladle process; Blast furnace ironmaking slag with lime powder and 1500 ℃ adds in the cinder ladle as adjusting material simultaneously; The scoriaceous add-on of blast furnace ironmaking is 6% of a molten steel slag total mass, and the lime powder add-on is 7% of a slag total mass.Wherein, lime powder sprays in the cinder ladle through the strength spray feed, and its chemical ingredients and mass percent are: CaO:99%, MgO:1%, the median size 5mm of lime powder; Scoriaceous chemical ingredients of blast furnace ironmaking and mass percent are: SiO
2: 35%, CaO:50%, Al
2O
3: 5%, Fe
2O
3: 3%, MgO:7%.After adjusting material added cinder ladle, insulation 60min under Current Temperatures.Adjusting material adds in the cinder ladle process, and the cinder ladle bottom blasts nitrogen and stirs, and continues to the insulation end.Obtain modified modified steel scoria gelling material after the cooling.
Claims (10)
1. modified modification processing method of molten steel slag; It is characterized in that; 1500～1700 ℃ of molten steel slags that converter steelmaking is discharged pour in the insulation cinder ladle process; Blast furnace ironmaking slag with lime powder and 1400～1550 ℃ adds in the cinder ladle as adjusting material simultaneously, and the scoriaceous add-on of blast furnace ironmaking is 1～50% of a molten steel slag total mass, and the lime powder add-on is 1～30% of a slag total mass.
2. the modified modification processing method of molten steel slag according to claim 1 is characterized in that scoriaceous composition of said blast furnace ironmaking and mass range are: SiO
2: 25～45%, CaO:30～50%, Al
2O
3: 5～20%, Fe
2O
3: 0.01～5%, MgO:0.01～10%.
3. the modified modification processing method of molten steel slag according to claim 1 is characterized in that the composition of said lime powder and mass range are: CaO:90～99.99%, MgO:0.01～10%.
4. the modified modification processing method of molten steel slag according to claim 1 is characterized in that the particle diameter of said lime powder is 1.0～10mm.
5. the modified modification processing method of molten steel slag according to claim 1 is characterized in that said lime powder sprays in the cinder ladle through the strength spray feed.
6. the modified modification processing method of molten steel slag according to claim 1 is characterized in that, after said adjusting material adds cinder ladle, and insulation 30～60min under Current Temperatures.
7. the modified modification processing method of molten steel slag according to claim 6 is characterized in that, adjusting material adds in the cinder ladle process, and the cinder ladle bottom blasts nitrogen and stirs, and continues to the insulation end.
8. the modified modification processing method of molten steel slag is characterized in that, 1600 ℃ of molten steel slags that converter steelmaking is discharged pour in the insulation cinder ladle process; Blast furnace ironmaking slag with lime powder and 1450 ℃ adds in the cinder ladle as adjusting material simultaneously, and the scoriaceous add-on of blast furnace ironmaking is 10% of a molten steel slag total mass, and the lime powder add-on is 10% of a slag total mass; Wherein, The composition of lime powder and mass range are: CaO:90%, MgO:10%, the median size 5mm of lime powder; Scoriaceous composition of blast furnace ironmaking and mass range are: SiO
2: 25%, CaO:40%, Al
2O
3: 20%, Fe
2O
3: 5%, MgO:10%.
9. the modified modification processing method of molten steel slag is characterized in that, 1600 ℃ of molten steel slags that converter steelmaking is discharged pour in the insulation cinder ladle process; Blast furnace ironmaking slag with lime powder and 1400 ℃ adds in the cinder ladle as adjusting material simultaneously, and the scoriaceous add-on of blast furnace ironmaking is 8% of a molten steel slag total mass, and the lime powder add-on is 8% of a slag total mass; Wherein, The composition of lime powder and mass range are: CaO:95%, MgO:5%, the median size 5mm of lime powder; Scoriaceous composition of blast furnace ironmaking and mass range are: SiO
2: 40%, CaO:40%, Al
2O
3: 10%, Fe
2O
3: 5%, MgO:5%.
10. the modified modification processing method of molten steel slag is characterized in that, 1700 ℃ of molten steel slags that converter steelmaking is discharged pour in the insulation cinder ladle process; Blast furnace ironmaking slag with lime powder and 1500 ℃ adds in the cinder ladle as adjusting material simultaneously, and the scoriaceous add-on of blast furnace ironmaking is 6% of a molten steel slag total mass, and the lime powder add-on is 7% of a slag total mass; Wherein, The composition of lime powder and mass range are: CaO:99%, MgO:1%, the median size 5mm of lime powder; Scoriaceous composition of blast furnace ironmaking and mass range are: SiO
2: 35%, CaO:50%, Al
2O
3: 5%, Fe
2O
3: 3%, MgO:7%.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106045347A (en) * | 2016-06-02 | 2016-10-26 | 辽宁科技大学 | Method for melting and digesting free calcium oxide in converter slag |
| CN107081432A (en) * | 2017-04-26 | 2017-08-22 | 阜阳市鑫源建材有限公司 | A kind of method that direct powdered of melted gangue metal prepares 3D printing raw material |
| CN107475468A (en) * | 2017-08-22 | 2017-12-15 | 东北大学 | A kind of method of Spinel growth behavior in regulation and control stainless steel slag |
| CN111018388A (en) * | 2019-12-31 | 2020-04-17 | 常州坚鹏建材有限公司 | High-performance mineral admixture and application thereof in concrete |
| CN113087420A (en) * | 2021-03-17 | 2021-07-09 | 张文 | Stokehole modified steel slag and preparation method thereof |
| CN113698115A (en) * | 2021-10-20 | 2021-11-26 | 盐城工学院 | Active auxiliary cementing material and method for on-line tempering of steel slag |
| CN114057403A (en) * | 2021-11-29 | 2022-02-18 | 西安热工研究院有限公司 | Modification and tempering method for slag liquid of double-U-shaped liquid slag discharging boiler |
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| CN101792274A (en) * | 2010-03-19 | 2010-08-04 | 华南理工大学 | Calcium-silicon-aluminum property regulating material for carrying out on-line high-temperature reconstruction on medium-alkalinity steel slag and application thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106045347A (en) * | 2016-06-02 | 2016-10-26 | 辽宁科技大学 | Method for melting and digesting free calcium oxide in converter slag |
| CN106045347B (en) * | 2016-06-02 | 2018-03-30 | 辽宁科技大学 | A kind of method for melting free calcium oxide in resolution converter slag |
| CN107081432A (en) * | 2017-04-26 | 2017-08-22 | 阜阳市鑫源建材有限公司 | A kind of method that direct powdered of melted gangue metal prepares 3D printing raw material |
| CN107475468A (en) * | 2017-08-22 | 2017-12-15 | 东北大学 | A kind of method of Spinel growth behavior in regulation and control stainless steel slag |
| CN107475468B (en) * | 2017-08-22 | 2019-03-12 | 东北大学 | A kind of method of Spinel growth behavior in regulation stainless steel slag |
| CN111018388A (en) * | 2019-12-31 | 2020-04-17 | 常州坚鹏建材有限公司 | High-performance mineral admixture and application thereof in concrete |
| CN111018388B (en) * | 2019-12-31 | 2021-09-17 | 常州坚鹏建材有限公司 | High-performance mineral admixture and application thereof in concrete |
| CN113087420A (en) * | 2021-03-17 | 2021-07-09 | 张文 | Stokehole modified steel slag and preparation method thereof |
| CN113698115A (en) * | 2021-10-20 | 2021-11-26 | 盐城工学院 | Active auxiliary cementing material and method for on-line tempering of steel slag |
| CN114057403A (en) * | 2021-11-29 | 2022-02-18 | 西安热工研究院有限公司 | Modification and tempering method for slag liquid of double-U-shaped liquid slag discharging boiler |
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Application publication date: 20120613 |