CN103045857B - Production method for sintering converter granulated slag to produce blast-furnace smelting sintered ore - Google Patents
Production method for sintering converter granulated slag to produce blast-furnace smelting sintered ore Download PDFInfo
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- CN103045857B CN103045857B CN201210579654.5A CN201210579654A CN103045857B CN 103045857 B CN103045857 B CN 103045857B CN 201210579654 A CN201210579654 A CN 201210579654A CN 103045857 B CN103045857 B CN 103045857B
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- granulated slag
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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
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Abstract
The invention discloses a production method for sintering converter granulated slag to produce blast-furnace smelting sintered ore. The production method is characterized by comprising the following steps: exposing converter granulated slag to high-pressure water to produce granulated slag with particle size of less than 5 mm, performing magnetic separation and then piling; thoroughly mixing one or two or more than two of ores (such as magnetite ore, hematite ore and limonite ore) to obtain an ingredient A with iron grade of 58% to 64% and water content of 4% to 8%; thoroughly mixing the granulated slag and the ingredient A accounting for 1-2% by weight to obtain a neutral mixture; and feeding the neutral mixture to a sintering machine for sintering production. The method has the advantages of preventing environmental pollution caused by converter granulated slag and secondary transport pollution of steel slag, and eliminating the impact on the sintering process because the granulated slag has a low TFe content, contains GaO and MgO and has a high content of harmful impurities S and P by optimizing the mixing proportion. The method can reduce the annual cost of the system, reduce the consumption cost of iron ore powders and fluxing agents and improve the air permeability of the sintered mixture by the uniformity of the granulated slag with particle size of less than 5 mm, and can increase the yield.
Description
Technical field
The production method relating to a kind of blast furnace sinter ore deposit of the present invention, particularly relates to a kind of production method converter grain slag being sintered into blast-furnace smelting agglomerate.
Background technology
Converter grain slag ferrous grade about 18%, containing GaO(45%-48%), MgO(8%-13%) etc., its comprehensive composition is shown in accompanying drawing 1.
It is domestic at present that on the process of converter grain slag, because solving, grain slag TFe in adapted is low, containing GaO, MgO and the higher impact on sintering process of detrimental impurity S, P, the conventional way of employing paves or sell private enterprise's making cement outward to process raw material as waste.These methods not only cause the waste of resource, and processing costs is high, water resource waste large, and result of use is bad.
Summary of the invention
Object of the present invention be just to provide a kind of utilize converter grain slag can reduce powdered iron ore consume while; owing to using containing the higher portion of flux that replaces of GaO, MgO, reach production method converter grain slag being sintered into blast-furnace smelting agglomerate of the object that turns waste into wealth.
Solution of the present invention is such:
The present invention includes step:
(1), by bessemer furnace slag high pressure water impact be processed into granularity and be less than 5 ㎜ grain slags, stack after magnetic separation;
(2), by one or any two kinds or the two or more mineral of magnetite, rhombohedral iron ore or limonite carry out mixing dosage, obtain the A material of ferrous grade at 58% ~ 67% moisture 4% ~ 8%;
(3), grain slag is accounted for mass ratio 1%-2% and A material to carry out being mixed into neutralization that ferrous grade reaches 58% ~ 64% and mix and expect;
(4), by neutralization mixing material deliver to sinter machine and produce, produce that barrate strength is greater than 75%, size composition ferrous grade and detrimental impurity in 5mm ~ 40mm and chemical composition all meet the agglomerate of blast-furnace smelting.
Advantage of the present invention is:
1, this technology solve the environmental pollution of converter grain slag and the transhipment of slag secondary pollute and be optimized join ore deposit solve grain slag TFe low, containing GaO, MgO and the higher impact on sintering process of detrimental impurity S, P; The utilization of this system cost-saving about 1,000,000 yuan every year.
2, powdered iron ore and flux consuming cost is reduced after using: willow steel converter grain slag has 120,000 tons × 150 yuan/ton=1,800 ten thousand yuan every year.
3, utilize the granularity of grain slag to be less than 5 ㎜ homogeneities, improve the ventilation property of sinter mixture, about 0.5% can be increased production.
Accompanying drawing explanation
Accompanying drawing 1 is Liu Gang grain slag main chemical compositions table.
Accompanying drawing 2 is production method block diagrams of the present invention.
Embodiment
The present embodiment adopts willow steel converter grain slag to be that example illustrates the present invention around forming blast-furnace smelting agglomerate.
Willow smelting steel agglomerate main chemical compositions as accompanying drawing 1,
(1), set up grain slag pond, bessemer furnace slag high pressure water impact is processed into granularity and is less than 5 ㎜ grain slags, collect rear belt in heaps or automobile by screw machine after magnetic separation and be transported to powdered iron ore stock ground and stack;
(2), by one or any two kinds or the two or more mineral of magnetite, rhombohedral iron ore or limonite carry out mixing dosage, obtain the A material of ferrous grade at 58% ~ 67% moisture 4% ~ 8%;
(3), grain slag is accounted for mass ratio 1%-2% and A material to carry out being mixed into neutralization that ferrous grade reaches 58% ~ 64% and mix and expect;
(4), by neutralization mixing material deliver to sinter machine and produce, produce that barrate strength is greater than 75%, size composition ferrous grade and detrimental impurity in 5mm ~ 40mm and chemical composition all meet the agglomerate of blast-furnace smelting.
Need in adapted by be optimized join ore deposit solve grain slag TFe low, containing GaO, MgO and the higher impact on sintering process of detrimental impurity S, P.
Specific embodiments of the invention are as follows:
Claims (1)
1. converter grain slag is sintered into a production method for blast-furnace smelting agglomerate, it is characterized in that: comprise step:
(1), by bessemer furnace slag high pressure water impact be processed into granularity and be less than 5 ㎜ grain slags, stack after magnetic separation;
(2), by one or any two kinds or the two or more mineral of magnetite, rhombohedral iron ore or limonite carry out mixing dosage, obtain the A material of ferrous grade at 58% ~ 64% moisture 4% ~ 8%;
(3), grain slag is accounted for mass ratio 1%-2% and A batching to carry out being mixed into the neutralization mixing material that ferrous grade reaches 58% ~ 64%;
(4), by neutralization mixing material deliver to sinter machine and produce, produce that barrate strength is 75.43% ~ 75.51%, size composition ferrous grade and detrimental impurity in 5mm ~ 40mm and chemical composition all meet the agglomerate of blast-furnace smelting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210579654.5A CN103045857B (en) | 2012-12-28 | 2012-12-28 | Production method for sintering converter granulated slag to produce blast-furnace smelting sintered ore |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210579654.5A CN103045857B (en) | 2012-12-28 | 2012-12-28 | Production method for sintering converter granulated slag to produce blast-furnace smelting sintered ore |
Publications (2)
| Publication Number | Publication Date |
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| CN103045857A CN103045857A (en) | 2013-04-17 |
| CN103045857B true CN103045857B (en) | 2014-12-31 |
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| CN201210579654.5A Active CN103045857B (en) | 2012-12-28 | 2012-12-28 | Production method for sintering converter granulated slag to produce blast-furnace smelting sintered ore |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107385203B (en) * | 2017-08-25 | 2019-01-08 | 鞍钢股份有限公司 | Method for preparing sintered ore by using thermal state converter slag as binder phase |
| CN112063835A (en) * | 2020-08-27 | 2020-12-11 | 包头钢铁（集团）有限责任公司 | Method for treating iron-containing solid waste by using sintering process |
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