CN102417939A - Method for preparing high-activity powder by using dry blast furnace slag - Google Patents
Method for preparing high-activity powder by using dry blast furnace slag Download PDFInfo
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- CN102417939A CN102417939A CN2011104086690A CN201110408669A CN102417939A CN 102417939 A CN102417939 A CN 102417939A CN 2011104086690 A CN2011104086690 A CN 2011104086690A CN 201110408669 A CN201110408669 A CN 201110408669A CN 102417939 A CN102417939 A CN 102417939A
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- slag
- dried 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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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 provides a method for preparing high-activity powder by using dry blast furnace slag. The method comprises the following steps of: crushing the slag, screening, performing magnetic separation, drying, performing primary pulverizing (adding a pulverizing aid) and secondary pulverizing (adding a pulverizing aid and an active agent), selecting the powder, discharging, and thus obtaining the high-activity powder. The physical and mechanical properties of the high-activity powder totally meet the requirements of cement mortar and concrete aggregate; and the method has the characteristics of achieving high resource recovery rate, saving the consumption of raw materials, reducing environmental pollution caused by the dry slag and realizing resource recycle.
Description
Technical field
The present invention relates to the preparation method of the dried slag of blast furnace, the high reactivity that is specifically related to the dried slag of a kind of blast furnace can powder preparation method.
Background technology
The dried slag of blast furnace is the waste material that is produced in the blast-furnace smelting pig iron process, promptly in air, slowly cools off or drench the block hard slag that the suitable quantity of water cooling forms densification.The dried slag of blast furnace is through processing rolling fragmentation, sieving into different-grain diameter, and alternative sandstone is made the building aggregate and used, and is used as the utility value that sand-cement slurry and aggregate can improve dried slag, realizes the resource utilization that dried slag utilizes.
In present blast furnace ironmaking process, often discharge is a large amount of through the dried slag of excess temperature between 1300 ℃ to 1500 ℃, and this dried solid impurity particle is inhomogeneous; Majority exists with bulk form; Its complex chemical composition comprises the silicon-dioxide of 15-17%, the aluminum oxide of 5-14%; The quicklime of 34-39%, 8% red stone and 6% Natural manganese dioxide.
Comprehensive utilization main purpose to the dried slag of blast furnace is the ferro element that reclaims in the dried slag at present, adopts the technology of high melt that dried slag is come out the iron melting under the state of high temperature reduction.Technical process is " electromagnetism is roughly selected → crusher in crushing → secondary magnetic roller magnetic separation → smelting furnace high temperature reduction → Water Quenching "; This method is only extracted the ferro element in the dried slag, and other effective constituent that can be used as sand-cement slurry does not but make full use of, and because dried slag fragmentation is insufficient; Shape, dried clinker not of uniform size are not effectively sieved; Cause reduction degree not high, and the waste residue after the reduction has influenced the performance of brick in order to brickmaking with pave the way; The more important thing is that the production of this kind grinding can not effectively excavate the potential of the dried slag of blast furnace, cause the great wasting of resources.
Therefore, effectively the dried slag of blast furnace is handled, the composition that makes full use of dried slag substitutes sandstone and does the use of building aggregate, turn waste into wealth, and be technical problem to be solved by this invention.
Summary of the invention
The present invention is directed to technical problem to be solved; A kind of dried slag activity and grinding preparation method thereof of exciting is provided; This method comprises physically activated dry magnetic separation; Add grinding aid, the preparation of activator stimulating activity, dried slag is prepared into the powder with high reactivity ability, its physical and mechanical property satisfies the requirement of making sand-cement slurry and concrete aggregate fully.
The technical scheme that the present invention adopts is following: the high reactivity ability powder preparation method of the dried slag of a kind of blast furnace; Preparation process comprises slag fragmentation, screening, magnetic separation, oven dry, one-level grinding (adding grinding aid), secondary grinding (adding grinding aid, acvator), selects the powder discharging; Be specially the dried slag of blast furnace and at first after crusher in crushing, get into the magnetic separation rotary conveyor; Deliver into trommel screen to the dried slag after the metallic iron magnetic separation; It is broken again after the screening particle diameter to be back to super-fine crusher greater than 10 millimeters slag, particle diameter direct entering stockyard below 10 millimeters, and dried slag gets into dryer through vibration feeder; In drying course, utilize ventilation system and fly-ash separator to carry out draining and gather dust, the dust of collection is transported to stockyard.
According to the present invention, said fragmentation is to use a kind of super-fine crusher, adopts three grades of crushing process, and every grade can be crushed to the dried slag of blast furnace below 10 millimeters, establishes the damping pedestal during installation, can reduce the vibrations noise.
Said magnetic separation is that the dried slag after the fragmentation is selected metallic iron through the magnetic separation rotary conveyor, and iron is reclaimed to greatest extent.
Said screening is with conveyor dried slag to be carried like lift entering trommel screen to sieve; To carry greater than 10 millimeters dried slags of particle diameter and be back to crusher continuation fragmentation; And below 10 millimeters directly as the finished product discharging, help slag composition is fully decomposed, extracts.
Said oven dry is with containing the dried slag of moisture through drying machine drying, dry back slag moisture less than 2.0%, helping the extraction at dry powder residue end.
Said grinding be ten thousand of dried slag and weight thereof/ grinding aid put into the one-level ball mill and carry out grinding; Add then its weight ten thousand/ acvator carry out the secondary Super-fine grinder; Make surface-area reach 500 ㎡/kilograms; More traditional grinding area has improved 200 ㎡/more than the kilogram, simultaneously 28 days activity indexs (%) >=95.
High-performance powder preparation method according to the dried slag of a kind of blast furnace provided by the invention; Also comprise waste gas pollution control and treatment equipment; Adopt gravity settling and bag pulse dedusting two-stage dust removal system; After gravity settling chamber, high-efficiency pulse bag-type dust purifying treatment, can significantly reduce the discharged gas fume dust content, the objectionable constituent that effectively purify air.
The producible beneficial effect of the present invention is: develop a kind of novel dried slag and reclaim technology; The dried slag of blast furnace is changed into high-performance powder; Its physical and mechanical property satisfies the requirement of making sand-cement slurry and concrete aggregate fully; Have resource recovery height, conservation consumption, reduce of the pollution of dried slag, realize the characteristic that resources circulation is utilized again environment.
High active powder is the Additive that equivalent replaces cement, has good economic benefit.By 118 kilograms of standard techniques of one ton of cement country's energy consumption quota regulation of every production, one ton of high active powder of every production is equal to 12.29 kilograms of standard coal equivalents.Blend with 45% (cement), 55% (reactive powder) when cement and high active powder, cement per ton can be practiced thrift 58.14 kilograms of standard coal equivalents, and 145.35 kilograms of reducing emission of carbon dioxide play active effect to energy-saving and emission-reduction.And high active powder is the good Additive of requirement preparation strong concrete, can improve and improve concrete strength resistance to corrosion and resisting power.
Description of drawings
Fig. 1 is preparation technology's schema of patent of the present invention.
Embodiment
Be described further below in conjunction with the accompanying drawing specific embodiments of the invention:
Embodiment one: will transport the dried slag of the blast furnace that contains certain moisture back and at first carry out fragmentation; Broken back gets into the magnetic separation rotary conveyor, gets into lift to the dried slag behind the magnetic separation metallic iron, delivers into trommel screen; It is broken again after the screening particle diameter to be back to super-fine crusher greater than 10 millimeters dried slag; Particle diameter directly gets into stockyard below 10 millimeters, dried slag gets into dryer through vibration feeder, going out the dried slag of machine moisture less than 2.0%; With dryer ventilation system dust-containing water steam through fly-ash separator, the mix dust of collection get into to promote and to be transported to stockyard;
Embodiment two: the dried slag of stockyard is claimed metering through belt; The compound activator acvator of hold-up vessel gets into ball mill simultaneously, and dried slag is transported to powder separating machine through lift behind the grinding; Qualified powder directly is delivered to stockyard; Loopback is transported to the one-level ball mill to underproof meal once more, the secondary ball mill carries out grinding, and this moment, qualified powder reached 99.5%, and was transported to stockyard;
Embodiment three: patent of the present invention can also be implemented on the basis of embodiment one like this: measure through screw feeder at stockyard dry powder residue end; Send into high thin ball mill, add grinding aid, acvator, grinding goes out specific surface area >=500 ㎡/kilogram powder entering lift and is transported to stockyard; Super-fine grinder machine ventilation system fly-ash separator; Induced draft fan wind enters atmosphere, and the dust of collection gets into air flume, is fed into stockyard through gas blower;
Embodiment four: the major equipment that the off gas treatment during patent of the present invention reclaims dried slag is administered is gravity settling and bag pulse dedusting two-stage dust removal system; Waste gas is after gravity settling chamber is handled, and most coarse particles is able to remove, and gets into the bag pulse dedusting system of back then; Dust in the gas is all filtered; The air that purifies directly discharges, and can significantly reduce effluxing the air dust content, reaches the emission standard of country.
The present invention be directed to the dried slag of blast furnace and be prepared into the technology that high active powder is developed, do the use of building aggregate, realize the purpose that turns waste into wealth by the alternative sandstone of high active powder that this explained hereafter goes out.
Claims (8)
1. the high reactivity of the dried slag of blast furnace can powder preparation method; Preparation process comprises slag fragmentation, screening, magnetic separation, oven dry, one-level grinding (adding grinding aid), secondary grinding (adding grinding aid, acvator), selects the powder discharging; It is characterized in that: the dried slag of blast furnace at first gets into the magnetic separation rotary conveyor after crusher in crushing; Deliver into trommel screen to the dried slag after the metallic iron magnetic separation; It is broken again after the screening particle diameter to be back to super-fine crusher greater than 10 millimeters slag, particle diameter direct entering stockyard below 10 millimeters, and dried slag gets into dryer through vibration feeder; In drying course, utilize ventilation system and fly-ash separator to carry out draining and gather dust, the dust of collection is transported to stockyard.
2. the high reactivity ability powder preparation method of the dried slag of a kind of blast furnace according to claim 1 is characterized in that: comprise disintegrating apparatus, magnetic plant, ball mill, tromeling equipment, drying plant, belt handling equipment, grinding aid, chemical activator and waste gas treatment equipment on its producing apparatus at least.
3. the high reactivity ability powder preparation method of the dried slag of a kind of blast furnace according to claim 1; It is characterized in that: said fragmentation is to use a kind of super-fine crusher; Adopt three grades of crushing process, every grade can be crushed to heavily dried slag below 10 millimeters, establish the damping pedestal during installation.
4. the high reactivity ability powder preparation method of the dried slag of a kind of blast furnace according to claim 1, it is characterized in that: said magnetic separation is that the dried slag after the fragmentation is selected metallic iron through the magnetic separation rotary conveyor, and iron is reclaimed to greatest extent.
5. the high reactivity ability powder preparation method of the dried slag of a kind of blast furnace according to claim 1; It is characterized in that: said screening is with conveyor dried slag to be carried like lift entering trommel screen to sieve; Will greater than the dried slags of 10 millimeters particle diameters carry be back to crusher continue broken, and below 10 millimeters directly as the finished product discharging.
6. the high reactivity ability powder preparation method of the dried slag of a kind of blast furnace according to claim 1, it is characterized in that: said oven dry is to dry through dried machine containing the dried slag of moisture, oven dry back slag moisture helps the extraction at dry powder residue end less than 2.0%.
7. the high reactivity ability powder preparation method of the dried slag of a kind of blast furnace according to claim 1; It is characterized in that: said grinding be ten thousand of dried slag and weight thereof/ grinding aid put into the one-level ball mill and carry out grinding; Add then its weight ten thousand/ acvator carry out the secondary Super-fine grinder; Make surface-area reach 500 ㎡/kilograms, more traditional grinding area has improved 200 ㎡/more than the kilogram, simultaneously 28 days activity indexs (%) >=95.
8. the high reactivity ability powder preparation method of the dried slag of a kind of blast furnace according to claim 1 is characterized in that: in this preparation facilities, comprise waste gas pollution control and treatment equipment at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011104086690A CN102417939A (en) | 2011-12-09 | 2011-12-09 | Method for preparing high-activity powder by using dry blast furnace slag |
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| CN2011104086690A CN102417939A (en) | 2011-12-09 | 2011-12-09 | Method for preparing high-activity powder by using dry blast furnace slag |
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| CN102417939A true CN102417939A (en) | 2012-04-18 |
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| CN2011104086690A Pending CN102417939A (en) | 2011-12-09 | 2011-12-09 | Method for preparing high-activity powder by using dry blast furnace slag |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103060493A (en) * | 2012-06-29 | 2013-04-24 | 南京梅山冶金发展有限公司 | Steel slag water washing ball milling manufacture processing craft |
| CN103894282A (en) * | 2014-03-18 | 2014-07-02 | 王开玺 | Technological method for sorting dedusting ash of blast furnace |
| CN104138885A (en) * | 2014-06-06 | 2014-11-12 | 张文钦 | Processing method for electric furnace slag obtained after special steel separation |
| CN104384176A (en) * | 2014-11-19 | 2015-03-04 | 晋江市冠兴建材有限责任公司 | Environment-friendly coal slag recovering and treating system |
| CN106552708A (en) * | 2016-11-16 | 2017-04-05 | 南京天合嘉能再生资源有限公司 | A kind of slag breeze production technology |
| CN107572852A (en) * | 2017-11-07 | 2018-01-12 | 广东韶钢嘉羊新型材料有限公司 | A kind of production method of high-performance ground granulated blast furnace slag |
| CN110355107A (en) * | 2018-04-09 | 2019-10-22 | 中冶宝钢技术服务有限公司 | Steel slag metal charge refines system and refining technique |
| CN113967525A (en) * | 2021-10-26 | 2022-01-25 | 山东永鑫环保科技有限公司 | Production process of high-activity steel slag micro powder |
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| CN1262254A (en) * | 1999-01-26 | 2000-08-09 | 武汉工业大学 | Process for preparing high-activity concrete additive |
| CN102070306A (en) * | 2010-04-23 | 2011-05-25 | 赵明友 | Production process of special low-carbon steel slag cement |
| CN102168155A (en) * | 2011-03-17 | 2011-08-31 | 济南鲍安环保技术开发有限公司 | Production process of steel slag micro-powder |
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2011
- 2011-12-09 CN CN2011104086690A patent/CN102417939A/en active Pending
Patent Citations (3)
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| CN1262254A (en) * | 1999-01-26 | 2000-08-09 | 武汉工业大学 | Process for preparing high-activity concrete additive |
| CN102070306A (en) * | 2010-04-23 | 2011-05-25 | 赵明友 | Production process of special low-carbon steel slag cement |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103060493A (en) * | 2012-06-29 | 2013-04-24 | 南京梅山冶金发展有限公司 | Steel slag water washing ball milling manufacture processing craft |
| CN103894282A (en) * | 2014-03-18 | 2014-07-02 | 王开玺 | Technological method for sorting dedusting ash of blast furnace |
| CN104138885A (en) * | 2014-06-06 | 2014-11-12 | 张文钦 | Processing method for electric furnace slag obtained after special steel separation |
| CN104384176A (en) * | 2014-11-19 | 2015-03-04 | 晋江市冠兴建材有限责任公司 | Environment-friendly coal slag recovering and treating system |
| CN106552708A (en) * | 2016-11-16 | 2017-04-05 | 南京天合嘉能再生资源有限公司 | A kind of slag breeze production technology |
| CN107572852A (en) * | 2017-11-07 | 2018-01-12 | 广东韶钢嘉羊新型材料有限公司 | A kind of production method of high-performance ground granulated blast furnace slag |
| CN110355107A (en) * | 2018-04-09 | 2019-10-22 | 中冶宝钢技术服务有限公司 | Steel slag metal charge refines system and refining technique |
| CN113967525A (en) * | 2021-10-26 | 2022-01-25 | 山东永鑫环保科技有限公司 | Production process of high-activity steel slag micro powder |
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| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yu Bailin Inventor after: Zou Jinfu Inventor after: Gong Yuanzhao Inventor after: Zhu Huiwei Inventor before: Yu Bailin |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: YU BOLIN TO: YU BOLIN ZOU JINFU GONG YUANZHAO ZHU HUIWEI |
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| C12 | Rejection of a patent application after its publication | ||
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Application publication date: 20120418 |