CN103864326B - A kind of slag aggregate processing method - Google Patents
A kind of slag aggregate processing method Download PDFInfo
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- CN103864326B CN103864326B CN201410037435.3A CN201410037435A CN103864326B CN 103864326 B CN103864326 B CN 103864326B CN 201410037435 A CN201410037435 A CN 201410037435A CN 103864326 B CN103864326 B CN 103864326B
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- slag aggregate
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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
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a kind of slag aggregate processing method, comprise following treatment step: will the slag after iron be selected to sieve, get the particle high pressure water washing of particle diameter between 0.5 ~ 25mm, naturally dry; By weight cinder 15.0 ~ 45.0, lime 40.0 ~ 80.0 and saltcake 2.0 ~ 8.0 are mixed, the balling-up of parcel slag, and 105 DEG C dry 2 hours; By the spherolite of oven dry in 1260 ~ 1360 DEG C of calcinings, and be incubated 4 hours; Be cooled to room temperature under field conditions (factors), obtain slag aggregate.The slag aggregate obtained with the method process not only has gelation activity in surface, eliminates or improve the interfacial transition zone of aggregate and hardening of cement body, and surface structure is fine and close, and concrete mixing water consumption is low; Industrial residue slag is turned waste into wealth, reduces environment and social load; Reduce natural aggregate consumption, save Nonrenewable resources; Raw material is easy to get, and technique is simple.
Description
Technical field
The present invention relates to a kind of slag aggregate and preparation method thereof, belong to field of solid waste treating technology.
Background technology
Mean level (ML) according to world's metallurgical industry calculates, and often produces 1 ton of crude steel and approximately discharges 0.13 ton of slag.About 1.5 hundred million tons of slags are discharged in the whole world every year, and China is about 0.8 hundred million tons.At present, the main processing ways of slag is mechanical activation, thermal activation, chemical activation etc., improved performance limited extent, in comprehensive utilization ratio only about 15%.The slag stored up in a large number not only takies a large amount of arable land, and expose to the sun and rain and weathering after, the soil and water resources of heavy metal ion or harmful ion severe contamination periphery, even harm humans is healthy.Therefore, be necessary to find the comprehensive utilization that practicable mode improves slag, play its economy of resources.
In China's current concrete annual production 20 billion cubic meter, natural sandstone more than 3,600,000,000 tons need be consumed.Although aggregate is the natural resources comparatively widely that distributes, owing to exploiting all the year round, start the problem occurring that building stones resource is hard to carry on.And a large amount of exploitation of natural materials and use, also cause soil erosion and natural landscape to worsen, have a strong impact on the Sustainable development of society, even jeopardize the existence of descendants.Slag composition is similar to slag, but causes its gelation activity extremely low due to the reason such as coarse grains, compact structure, and owing to experienced by the high temperature of 1650 DEG C, top layer is vesicular structure, and hardness is high, and grindability is poor.In view of the above circumstances, this patent provides a kind of slag aggregate, not only excellent property, and turns waste into wealth, and saves Nonrenewable resources resource, reduces environment and social load.
Summary of the invention
The object of the present invention is to provide a kind of slag aggregate and preparation method thereof, the slag aggregate obtained with the method process not only has gelation activity in surface, eliminate or improve the interfacial transition zone of aggregate and hardening of cement body, and surface structure is fine and close, concrete mixing water consumption is low.
Technical scheme of the present invention is as follows:
1, a kind of slag aggregate and preparation method thereof, is characterized in that comprising following treatment step:
(1) will the slag after iron be selected to sieve, get the particle high pressure water washing of particle diameter between 0.5 ~ 25mm, naturally dry;
(2) cinder, lime and thenardite are mixed by following weight part, the balling-up of parcel slag, and 105 DEG C dry 2 hours;
Cinder 15.0 ~ 45.0
Lime 40.0 ~ 80.0
Saltcake 2.0 ~ 8.0
(3) by the spherolite of drying in 1260 ~ 1360 DEG C of calcinings, and be incubated 4 hours;
(4) be cooled to room temperature under field conditions (factors), obtain slag aggregate.
Cinder of the present invention, its specific surface area is between 400 ~ 420m
2/ Kg; Lime, its specific surface area is between 340 ~ 360m
2/ Kg; Thenardite, its specific surface area is between 350 ~ 380m
2/ Kg.
Outstanding advantages of the present invention is:
(1) slag aggregate top layer provided by the present invention has gelation activity, eliminates or improve the interfacial transition zone of aggregate and hardening of cement body;
(2) experience volatiles in 1650 DEG C of pyroprocesses to overflow, cause the vesicular structure of slag, and the slag aggregate surface structure that this invention provides is fine and close, reduces concrete mixing water consumption;
(3) industrial residue slag is turned waste into wealth, reduce environment and social load;
(4) reduce natural aggregate consumption, save Nonrenewable resources resource;
(5) raw material is easy to get, and technique is simple.
Embodiment
Embodiment 1
(1) will the slag after iron be selected to sieve, get the particle high pressure water washing of particle diameter between 0.5 ~ 25mm, naturally dry;
(2) 40% cinder, 53% lime and 7% thenardite are mixed by following weight part, the balling-up of parcel slag, and 105 DEG C dry 2 hours;
(3) by the spherolite of drying in 1280 DEG C of calcinings, and be incubated 4 hours;
(4) be cooled to room temperature under field conditions (factors), obtain slag aggregate.
The crush index recording slag aggregate according to GB/T14685-2011 " cobble for building, rubble " is 13%, and water-intake rate is 1.48%.Replace 50% natural aggregate with slag aggregate, survey 28 days concrete crushing strengths according to GB/T50107-2010 " Standard for inspection and assessment of strength of concrete " and reach C30 requirement.
Embodiment 2
(1) will the slag after iron be selected to sieve, get the particle high pressure water washing of particle diameter between 0.5 ~ 25mm, naturally dry;
(2) 35% cinder, 60% lime and 5% thenardite are mixed by following weight part, the balling-up of parcel slag, and 105 DEG C dry 2 hours;
(3) by the spherolite of drying in 1300 DEG C of calcinings, and be incubated 4 hours;
(4) be cooled to room temperature under field conditions (factors), obtain slag aggregate.
The crush index recording slag aggregate according to GB/T14685-2011 " cobble for building, rubble " is 12%, and water-intake rate is 1.38%.Replace 50% natural aggregate with slag aggregate, survey 28 days concrete crushing strengths according to GB/T50107-2010 " Standard for inspection and assessment of strength of concrete " and reach C30 requirement.
Embodiment 3
(1) will the slag after iron be selected to sieve, get the particle high pressure water washing of particle diameter between 0.5 ~ 25mm, naturally dry;
(2) 30% cinder, 67% lime and 3% thenardite are mixed by following weight part, the balling-up of parcel slag, and 105 DEG C dry 2 hours;
(3) by the spherolite of drying in 1350 DEG C of calcinings, and be incubated 4 hours;
(4) be cooled to room temperature under field conditions (factors), obtain slag aggregate.
The crush index recording slag aggregate according to GB/T14685-2011 " cobble for building, rubble " is 12%, and water-intake rate is 1.21%.Replace 50% natural aggregate with slag aggregate, survey 28 days concrete crushing strengths according to GB/T50107-2010 " Standard for inspection and assessment of strength of concrete " and reach C30 requirement.
Reference examples 1:
The crush index recording natural aggregate according to GB/T14685-2011 " cobble for building, rubble " is 10%, and water-intake rate is 1.12%.Survey 28 days concrete crushing strengths with 100% natural aggregate according to GB/T50107-2010 " Standard for inspection and assessment of strength of concrete " and reach C35 requirement.
Reference examples 2:
(1) will the slag after iron be selected to sieve, get the particle high pressure water washing of particle diameter between 0.5 ~ 25mm, naturally dry;
(2) crush index recording slag according to GB/T14685-2011 " cobble for building, rubble " is 18%, and water-intake rate is 8.78%.Survey 28 days concrete crushing strengths with 100% slag according to GB/T50107-2010 " Standard for inspection and assessment of strength of concrete " and just reach C10 requirement.
Claims (4)
1. a slag aggregate processing method, is characterized in that comprising following treatment step:
(1) will the slag after iron be selected to sieve, get the particle high pressure water washing of particle diameter between 0.5 ~ 25mm, naturally dry;
(2) cinder, lime and saltcake are mixed by following weight part, the balling-up of parcel slag, and 105 DEG C dry 2 hours;
Cinder 15.0 ~ 45.0
Lime 40.0 ~ 80.0
Saltcake 2.0 ~ 8.0
(3) by the spherolite of drying in 1260 ~ 1360 DEG C of calcinings, and be incubated 4 hours;
(4) be cooled to room temperature under field conditions (factors), obtain slag aggregate.
2. slag aggregate processing method as claimed in claim 1, is characterized in that the specific surface area of described cinder is between 400 ~ 420m
2/ Kg.
3. slag aggregate processing method as claimed in claim 1, is characterized in that the specific surface area of described lime is between 340 ~ 360m
2/ Kg.
4. slag aggregate processing method as claimed in claim 1, it is characterized in that described saltcake is thenardite, its specific surface area is between 350 ~ 380m
2/ Kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410037435.3A CN103864326B (en) | 2014-01-27 | 2014-01-27 | A kind of slag aggregate processing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410037435.3A CN103864326B (en) | 2014-01-27 | 2014-01-27 | A kind of slag aggregate processing method |
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| CN103864326A CN103864326A (en) | 2014-06-18 |
| CN103864326B true CN103864326B (en) | 2015-12-02 |
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| CN110434155B (en) * | 2019-08-16 | 2021-03-23 | 绍兴市环保科技服务中心 | Co-sintering process of organic contaminated soil and mirabilite |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4198450A (en) * | 1974-03-06 | 1980-04-15 | Pelt & Hooykaas B.V. | Coating pipes and receptacles with a weighting layer or mass of steel slag aggregate |
| GB2375347A (en) * | 2001-05-09 | 2002-11-13 | Tarmac Ltd | Stabilisation of clay materials; forming aggregate |
| CN1465538A (en) * | 2002-06-08 | 2004-01-07 | 叶德敏 | Steel slag modification and steel slag cement |
| CN102534066A (en) * | 2011-12-13 | 2012-07-04 | 河南科技大学 | High-temperature molten steel slag treating method |
-
2014
- 2014-01-27 CN CN201410037435.3A patent/CN103864326B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4198450A (en) * | 1974-03-06 | 1980-04-15 | Pelt & Hooykaas B.V. | Coating pipes and receptacles with a weighting layer or mass of steel slag aggregate |
| GB2375347A (en) * | 2001-05-09 | 2002-11-13 | Tarmac Ltd | Stabilisation of clay materials; forming aggregate |
| CN1465538A (en) * | 2002-06-08 | 2004-01-07 | 叶德敏 | Steel slag modification and steel slag cement |
| CN102534066A (en) * | 2011-12-13 | 2012-07-04 | 河南科技大学 | High-temperature molten steel slag treating method |
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| CN103864326A (en) | 2014-06-18 |
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| CB03 | Change of inventor or designer information |
Inventor after: Liu Yu Inventor before: Gong Chenchen Inventor before: Lu Lingchao Inventor before: Wang Shoude Inventor before: Cheng Xin |
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Effective date of registration: 20160715 Address after: 518000 Shenzhen, Guangdong province Nanshan District fun Village Patentee after: Shenzhen Gangchuang Building Material Co., Ltd. Address before: The central nanxinzhuang Ji'nan Road, No. 336 of 250022 cities in Shandong Province Patentee before: University of Jinan |