CN102531419A - Steel slag activation method - Google Patents
Steel slag activation method Download PDFInfo
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- CN102531419A CN102531419A CN2012100010517A CN201210001051A CN102531419A CN 102531419 A CN102531419 A CN 102531419A CN 2012100010517 A CN2012100010517 A CN 2012100010517A CN 201210001051 A CN201210001051 A CN 201210001051A CN 102531419 A CN102531419 A CN 102531419A
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- slag
- steel slag
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- sodium aluminate
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Abstract
The invention provides a steel slag activation method comprising the following steps: hot disintegration steel slag is soaked for 15 days in a mixed solution of 50 to 90 % sodium silicate and 10 to 50 % sodium aluminate, the soaked steel slag is naturally dried for 48 hours, and the naturally dried steel slag is heated to 800 DEG C and is then insulated for 4 hours; and under the natural condition, the steel slag is cooled to the room temperature, then the steel slag is ground fine until the specific surface of the steel slag reaches above 450 M<2>/Kg, and activated steel slag micro powder is obtained. The activity index of steel slag obtained through the method can be improved by about 50 %, and the strength of gelled material produced by steel slag obtained through the method can be more than doubled.
Description
Technical field
The present invention relates to field of solid waste treating technology, be specifically related to a kind of activation method of slag.
Background technology
Slag is exactly the slag that steelmaking process is discharged.Slag mainly is the impurity brought into of the oxidized back of each element generates in the metal charge oxide compound, the gainster that is etched and fettling material, metal charge and the slag making materials that specially adds for adjustment slag character, like Wingdale, rhombspar, iron ore, silica etc.The essential mineral of slag consists of tricalcium silicate, Dicalcium Phosphate (Feed Grade), monticellite, calcium manganolite, dicalcium ferrite, RO (R represents the oxide compound of magnesium, iron, manganese, i.e. the Solid solution of FeO, MgO, MnO formation), free lime (fCaO) etc.
The metallurgical industry of countries in the world, 1 ton of crude steel of every production all can discharge the slag of about 130KG, about 1～1.5 hundred million ton of the annual discharging in whole world slag amount.China is domestic, and to accumulate slag existing more than 100,000,000 tons, and annually still increase progressively with tens million of tons bed drain purge, and the utilization ratio of China's slag is lower, is about 10%.If do not handle and fully utilize, slag can take increasing soil, contaminate environment, cause the waste of resource, influences the Sustainable development of Iron And Steel Industry.Therefore be necessary slag is carried out minimizing, resource utilization and high value comprehensive utilizating research.
At present, Multipurpose Utilization of Steel Slag is mainly comprised fields such as metallurgy, material of construction, agricultural use, practical applications.Aspect material of construction, slag can be used for producing cement, is used for road-making material, is used for building materials production (as producing brick, building block) etc.But because silicone content only has an appointment 9% in the slag, want much less, cause its hydration activity low than the silicone content in the cement (20%～30%), with its material of construction of making not only time of coagulation long, and intensity is low.
Summary of the invention
Technical problem to be solved by this invention provides a kind of activation method of slag, and the activity index of handling the slag that obtains with this method can improve more than 50%, and handling the slag production gelling material intensity that obtains with this method can be enhanced about more than once.
The technical scheme that the present invention adopted is:
A kind of activation method of slag, this method comprises following operation steps:
(1) the vexed slag of heat was soaked 15 days at the mixing solutions of water glass and sodium aluminate, the mixing solutions mesosilicic acid sodium content of water glass and sodium aluminate is 50%～90%, sodium aluminate content is 10%～50%;
(2) the slag natural air drying after will soaking is 48 hours;
(3) slag behind the natural air drying is heated to 800 ℃, is incubated 4 hours then;
(4) under field conditions (factors) slag is cooled to room temperature, carries out grinding to fineness then and reach specific surface area greater than 450M
2/ Kg obtains the activated steel slag micro mist.
Compared with prior art; The present invention has following remarkable advantage and beneficial effect: activation method of the present invention fully soaks the vexed slag of heat in water glass and sodium aluminate solution earlier; Make silicon ion, aluminum ion in the solution be penetrated into slag (the slag micro content is big) inside; Be incubated 4 hours under 800 ℃ of temperature then, soak makes the various elements of the inner free form of slag such as silicon ion, calcium ion etc. react the high hydration activity mineral of generation, thereby makes the slag micro powder activity index of formation improve more than 50%; Gelling material intensity with its preparation is enhanced about more than once, thereby effectively satisfies material of construction antagonism folding, the equicohesive demand of resistance to compression.
Embodiment
Below in conjunction with embodiment the present invention is made further specific descriptions, but present embodiment only is used to the present invention is described and is not used in restriction the present invention.
Embodiment 1:
The vexed slag raw material of heat-obtaining is handled according to activation method of the present invention:
(1) the vexed slag raw material of heat was soaked 15 days at the mixing solutions of water glass and sodium aluminate, the mixing solutions mesosilicic acid sodium content of water glass and sodium aluminate is 80%, sodium aluminate content is 20%;
(2) the slag natural air drying after will soaking is 48 hours;
(3) slag behind the natural air drying is heated to 800 ℃, is incubated 4 hours then;
(4) under field conditions (factors) slag is cooled to room temperature, carries out grinding (traditional ball milling method) to fineness then and reach specific surface area greater than 450M
2/ Kg obtains the activated steel slag micro mist.
Get activated steel slag micro mist 225 grams, PO42.5 cement 225 grams, water 225 grams, standard sand 1350 grams; Process the 40x40x160mm test specimen; Detect its activity index: three days folding strengths are that 4.2MPa, ultimate compression strength are 22.7MPa, and 28 days folding strengths are that 8.3MPa, ultimate compression strength are 44.1MPa.
Reference examples 1:
Get hot vexed slag raw material, reach specific surface area greater than 450M without activation treatment grinding to fineness with embodiment 1
2/ Kg (grinding method is with embodiment 1) obtains slag micro powder.
Get slag micro powder 225 grams, PO42.5 cement 225 grams, water 225 grams, standard sand 1350 grams; Process the 40x40x160mm test specimen; Detect its activity index: three days folding strengths are that 1.8MPa, ultimate compression strength are 9.8MPa, and 28 days folding strengths are that 5.2MPa, ultimate compression strength are 29.5MPa.
Embodiment 2:
The vexed slag raw material of heat-obtaining is handled according to activation method of the present invention:
(1) the vexed slag raw material of heat was soaked 15 days at the mixing solutions of water glass and sodium aluminate, the mixing solutions mesosilicic acid sodium content of water glass and sodium aluminate is 50%, sodium aluminate content is 50%;
(2) the slag natural air drying after will soaking is 48 hours;
(3) slag behind the natural air drying is heated to 800 ℃, is incubated 4 hours then;
(4) under field conditions (factors) slag is cooled to room temperature, carries out grinding (traditional ball milling method) to fineness then and reach specific surface area greater than 450M
2/ Kg obtains the activated steel slag micro mist.
Get activated steel slag micro mist 225 grams, PO42.5 cement 225 grams, water 225 grams, standard sand 1350 grams; Process the 40x40x160mm test specimen; Detect its activity index: three days folding strengths are that 3.0MPa, ultimate compression strength are 12.9MPa, and 28 days folding strengths are that 5.9MPa, ultimate compression strength are 34.7MPa.
Reference examples 2:
Get hot vexed slag raw material, reach specific surface area greater than 450M without activation treatment grinding to fineness with embodiment 2
2/ Kg (grinding method is with embodiment 2) obtains slag micro powder.
Get slag micro powder 225 grams, PO42.5 cement 225 grams, water 225 grams, standard sand 1350 grams; Process the 40x40x160mm test specimen; Detect its activity index: three days folding strengths are that 1.8MPa, ultimate compression strength are 9.8MPa, and 28 days folding strengths are that 5.2MPa, ultimate compression strength are 29.5MPa.
Embodiment 3:
The vexed slag raw material of heat-obtaining is handled according to activation method of the present invention:
(1) the vexed slag raw material of heat was soaked 15 days at the mixing solutions of water glass and sodium aluminate, the mixing solutions mesosilicic acid sodium content of water glass and sodium aluminate is 90%, sodium aluminate content is 10%;
(2) the slag natural air drying after will soaking is 48 hours;
(3) slag behind the natural air drying is heated to 800 ℃, is incubated 4 hours then;
(4) under field conditions (factors) slag is cooled to room temperature, carries out grinding (traditional ball milling method) to fineness then and reach specific surface area greater than 450M
2/ Kg obtains the activated steel slag micro mist.
Get activated steel slag micro mist 225 grams, PO42.5 cement 225 grams, water 225 grams, standard sand 1350 grams; Process the 40x40x160mm test specimen; Detect its activity index: three days folding strengths are that 3.6MPa, ultimate compression strength are 16.7MPa, and 28 days folding strengths are that 6.3MPa, ultimate compression strength are 38.4MPa.
Reference examples 3:
Get hot vexed slag raw material, reach specific surface area greater than 450M without activation treatment grinding to fineness with embodiment 3
2/ Kg (grinding method is with embodiment 3) obtains slag micro powder.
Get slag micro powder 225 grams, PO42.5 cement 225 grams, water 225 grams, standard sand 1350 grams; Process the 40x40x160mm test specimen; Detect its activity index: three days folding strengths are that 1.8MPa, ultimate compression strength are 9.8MPa, and 28 days folding strengths are that 5.2MPa, ultimate compression strength are 29.5MPa.
The raw material that embodiment is used unless otherwise indicated, is common commercially available industrial goods.
The above embodiment of the present invention is can not be used to limit the present invention to explanation of the present invention, and implication suitable with claims of the present invention and any change in the scope all should be thought to be included in the scope of claims.
Claims (1)
1. the activation method of a slag is characterized in that comprising following operation steps:
(1) the vexed slag of heat was soaked 15 days at the mixing solutions of water glass and sodium aluminate, the mixing solutions mesosilicic acid sodium content of water glass and sodium aluminate is 50%～90%, sodium aluminate content is 10～50%;
(2) the slag natural air drying after will soaking is 48 hours;
(3) slag behind the natural air drying is heated to 800 ℃, is incubated 4 hours then;
(4) under field conditions (factors) slag is cooled to room temperature, carries out grinding to fineness then and reach specific surface area greater than 450M
2/ Kg obtains the activated steel slag micro mist.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210001051 CN102531419B (en) | 2012-01-04 | 2012-01-04 | Steel slag activation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210001051 CN102531419B (en) | 2012-01-04 | 2012-01-04 | Steel slag activation method |
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| CN102531419A true CN102531419A (en) | 2012-07-04 |
| CN102531419B CN102531419B (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201210001051 Expired - Fee Related CN102531419B (en) | 2012-01-04 | 2012-01-04 | Steel slag activation method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103215043A (en) * | 2013-04-07 | 2013-07-24 | 浙江大学宁波理工学院 | Clinker-free steel slag fine powder composite soil solidifying agent |
| CN103241966A (en) * | 2013-05-10 | 2013-08-14 | 浙江大学宁波理工学院 | Clinker free regenerated slag micro-powder compound cement |
| CN106747150A (en) * | 2016-12-30 | 2017-05-31 | 重庆市富环建筑材料有限责任公司 | The double-doped miberal powder of high intensity |
| CN115368044A (en) * | 2022-08-22 | 2022-11-22 | 北京联绿生态环境有限公司 | Coal gangue admixture and application thereof, and C15 concrete |
| CN115872636A (en) * | 2022-12-08 | 2023-03-31 | 安徽马钢嘉华新型建材有限公司 | Application of modified steel slag in preparation of fitness equipment |
| CN116217101A (en) * | 2022-12-08 | 2023-06-06 | 安徽马钢嘉华新型建材有限公司 | Steel slag treating agent and steel slag recycling method |
Citations (4)
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| CN1120524A (en) * | 1994-10-14 | 1996-04-17 | 湖南大学 | Flyash activation method |
| CN101555531A (en) * | 2009-05-19 | 2009-10-14 | 华南理工大学 | Method for activating and modifying steel slag by residual heat of converter steel slag |
| CN101717837A (en) * | 2009-12-19 | 2010-06-02 | 中北大学 | Chemical activation liquid of converter slag and application method thereof |
| JP2011168468A (en) * | 2010-02-16 | 2011-09-01 | Shigeji Kobori | Method for hardening blast furnace slag |
-
2012
- 2012-01-04 CN CN 201210001051 patent/CN102531419B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1120524A (en) * | 1994-10-14 | 1996-04-17 | 湖南大学 | Flyash activation method |
| CN101555531A (en) * | 2009-05-19 | 2009-10-14 | 华南理工大学 | Method for activating and modifying steel slag by residual heat of converter steel slag |
| CN101717837A (en) * | 2009-12-19 | 2010-06-02 | 中北大学 | Chemical activation liquid of converter slag and application method thereof |
| JP2011168468A (en) * | 2010-02-16 | 2011-09-01 | Shigeji Kobori | Method for hardening blast furnace slag |
Non-Patent Citations (1)
| Title |
|---|
| 商品混凝土: "钢渣活性激发的研究进展", 《商品混凝土》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103215043A (en) * | 2013-04-07 | 2013-07-24 | 浙江大学宁波理工学院 | Clinker-free steel slag fine powder composite soil solidifying agent |
| CN103215043B (en) * | 2013-04-07 | 2015-10-07 | 浙江大学宁波理工学院 | Clinker-free steel slag fine powder composite soil solidifying agent |
| CN103241966A (en) * | 2013-05-10 | 2013-08-14 | 浙江大学宁波理工学院 | Clinker free regenerated slag micro-powder compound cement |
| CN103241966B (en) * | 2013-05-10 | 2015-03-11 | 浙江大学宁波理工学院 | Clinker free regenerated slag micro-powder compound cement |
| CN106747150A (en) * | 2016-12-30 | 2017-05-31 | 重庆市富环建筑材料有限责任公司 | The double-doped miberal powder of high intensity |
| CN115368044A (en) * | 2022-08-22 | 2022-11-22 | 北京联绿生态环境有限公司 | Coal gangue admixture and application thereof, and C15 concrete |
| CN115872636A (en) * | 2022-12-08 | 2023-03-31 | 安徽马钢嘉华新型建材有限公司 | Application of modified steel slag in preparation of fitness equipment |
| CN116217101A (en) * | 2022-12-08 | 2023-06-06 | 安徽马钢嘉华新型建材有限公司 | Steel slag treating agent and steel slag recycling method |
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| CN102531419B (en) | 2013-03-06 |
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