CN1167642C - Mixed cement material with fine active steel slag powder and method of preparing high grade cement with it - Google Patents
Mixed cement material with fine active steel slag powder and method of preparing high grade cement with it Download PDFInfo
- Publication number
- CN1167642C CN1167642C CNB001248219A CN00124821A CN1167642C CN 1167642 C CN1167642 C CN 1167642C CN B001248219 A CNB001248219 A CN B001248219A CN 00124821 A CN00124821 A CN 00124821A CN 1167642 C CN1167642 C CN 1167642C
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- China
- Prior art keywords
- cement
- slag
- powder
- steel slag
- steel
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to cement high activity mixed materials made of milled steel slag powder, a making method of the cement high activity mixed materials and a method for making high grade universal cement by using the cement high activity mixed materials. The specific surface area of the high activity milled steel slag powder is at least 300m<2>/kg, the content of particles with a particle diameter smaller than 40 mum is larger than 65 wt%, activity indexes of 7 days and 28 days are at least 75% and 80% respectively, and stability is qualified. During cement making, the steel slag powder accounting for 10 to 50% of a total weight and 0 to 35% of other mixed material are doped, components can be milled in advance and then mixed, and the milled steel slag powder, coarse cement clinkers and other components can also be milled together. The steel slag powder has the making method: after steel slag smaller than 60mm is thrown into a pulverizer to be pulverized, the steel slag is separated by a grader.
Description
The present invention is a kind of cement high reactivity blending material made from ground steel slag and with the method for its preparation cement, relates to the cement material field of building material industry.
Technology related to the present invention has following:
(1) adopt slag to prepare dross slag cement as cement additive.Its major technique and more advanced technology are: water is vexed in advance with slag, makes it to be crushed into several centimetres to several millimeters particle, with these steel slag particles and the common grinding of cement clinker, slag and gypsum, reaches specific surface area 350m
2/ kg makes cement.Wherein the part by weight of each component is: slag 〉=30%, and slag+slag 〉=60%, gypsum about 5%, all the other are Portland clinker.The strength of cement of making is divided into 325 and 425 two labels.Corresponding dross slag cement national standard is arranged.
(2) utilize steel-making slag powder as cement additive, add exciting agent, preparation contains the cement of slag.Be characterized in: when manufacture of cement, add special exciting agent, improve strength of cement.The kind of exciting agent has multiple, and majority is an industrial chemicals, and some are also arranged is burnt gypsum.The common grinding of granular slag and cement clinker, gypsum and exciting agent.Strength of cement label major part is 325# and 425#, has on a small quantity to reach 525#.
Above technology has been represented slag on going result aspect the utilisation technology in cement in recent years, but the fineness for slag is not controlled, and the actual particle of slag in cement is thick excessively, and the activity of slag does not obtain performance, activity is lower, causes steel slag cement intensity low.The dross slag cement label of factory's actual production is mainly 325# and 425#.If weigh according to international standard (iso standard), strength mark is lower.If adopt the method for admixture exciting agent, though the strength of cement label can be brought up to 525#, national cement standard does not allow admixture to the influential auxiliary agent of cement performance, otherwise concrete Effect on Performance is difficult to control.This cement that has caused containing slag the competitive power on the market a little less than, this is restricted the utilize total amount of slag in cement.
The objective of the invention is to make a kind of highly active slag pulverized powder that has, as the high reactivity blending material of cement, in cement during admixture 10-35% (weight), can the preparation strength label be 525 cement; In cement during admixture 35-50% (weight), can the preparation strength label be 425 cement.This cement high reactivity blending material specific surface area is big, and is active high, is applicable to and makes 525# ordinary Portland cement, slag ordinary Portland cement, compound ordinary Portland cement, dross slag cement.Ground steel slag can be in cement admixture separately, also can with flyash, slag, volcanic ash, slag, zeolite, coal gangue, phosphorus slag and the compound admixture of other industrial residue.The cement of making is applicable to preparation normal concrete, mass concrete (as base concrete, the dam concrete of heavy construction), high-strength concrete, prestressed concrete, concrete prefabricated element etc.
Particular content of the present invention is as follows:
1. slag adopts levigate in advance and sorting, makes its specific surface area 〉=300m
2/ kg, particle diameter less than the granule content of 40 μ m greater than 65% (weight), salient features reaches: the activity index of 7 days and 28 days is respectively more than or equal to 75% and 80%, all far above country about requirement as the active standard code 70% of the industrial residue of cement additive; Density=2.90-3.30g/cm
3, press the steaming stability qualified.Wherein the test evaluation method of each index all adopts existing universal method:
Activity index: test according to " GB 12957-1991 is as the industrial residue activity test method of cement additive ", represent with 28 days the ultimate compression strength of mixture of 30% (weight) ground steel slag and 70% (weight) 525# silicate cement and the ratio of 28 days ultimate compression strength of pure 525# silicate cement.That is:
Press and steam stability: after the admixture 30% high reactivity steel-making slag powder, the press-steamed method of stipulating through national cement standard is up to the standards in 525 silicate cements.
Basicity factor: the ratio with oxide content (weight) is represented: CaO/ (SiO
2+ P
2O
5)
Composition requires: metal Ferrum content≤0.8% (weight), free calcium oxide content≤3% (weight), basicity factor 〉=2.
2. admixture high reactivity steel-making slag powder mixing material is produced the method for cement of high index and is: when the preparation strength label is 525 cement, mix levigate high reactivity steel-making slag powder that accounts for gross weight 10-35% and other industrial residue that accounts for gross weight 0-30%, as mixing material; When the preparation strength label is 425 cement, mix levigate high reactivity steel-making slag powder that accounts for gross weight 30-50% and other industrial residue that accounts for gross weight 0-35%, as mixing material.Specific surface area 〉=the 300m of high reactivity steel-making slag powder wherein
2/ kg, other industrial residue comprises slag, flyash, volcanic ash, slag, zeolite, coal gangue, phosphorus slag etc.The kind of cement comprises ordinary Portland cement, slag ordinary Portland cement, compound ordinary Portland cement, Portland fly ash cement, dross slag cement.Adopt one of following three kinds of technologies to make cement:
(1) except that steel-making slag powder, other each component of cement is also distinguished grinding in advance to specific surface area 300m
2More than/the kg, and then, make cement with levigated steel-making slag powder mixed according to the rules is even.
(2) other each component of cement is distinguished grinding in advance to specific surface area 200m
2More than/the kg, and then with levigated steel-making slag powder mixed according to the rules is even, further grinding is in addition made cement simultaneously.
(3) with the levigated steel-making slag powder with without levigated cement clinker and other each component in advance according to the rules ratio join simultaneously in the grinding machine, common grinding reaches total specific surface area 300m
2Make cement more than the/kg.
3. the manufacturing process of high reactivity steel-making slag powder cement additive is as follows:
Pulverize → enter grading machine sorting → obtain specific surface area in block slag → input pulverizer less than 60mm greater than 300m
2The powder-like product of/kg.Wherein when metal Ferrum content during greater than 0.8% (weight), insert magnetic separator in a link of production process, the blanking metallic iron makes it content less than 0.8% (weight).The specific surface area of powder-like product can be adjusted by the parameter of adjusting grading machine as required, and scope is 300-500m
2/ kg.
Advantage of the present invention and effect:
Ground steel slag proposed by the invention has that hydration reaction is active high, the manufacture of cement cost is low, strength of cement is high and advantage such as good combination property.The cement that the highly active ground steel slag of admixture part is made as mixing material is used for concrete works, can reduce concrete hydration heat temperature rise, guarantee early age strength of concrete, improve later strength, increase concrete wear resistance and corrosion resistance, improve concrete durability.
Below be embodiments of the invention:
Example 1: cement clinker in advance grinding to specific surface area 330m
2/ kg, ground steel slag specific surface area 303m
2/ kg, levigate thin slag powders specific surface area 383m
2/ kg prepares burden, mixes according to following table, makes cement, and the pressure steaming stability that records cement is all qualified, and time of coagulation is normal, meets national standard, strength of cement such as following table:
| Cement mark | Weight percent % | Folding strength (MPa) | Ultimate compression strength (MPa) | |||||||
| Grog | Gypsum | Slag | Slag | 3d | 7d | 28d | 3d | 7d | 28d | |
| Contrast | 95 | 5 | 0 | 0 | 7.1 | 7.9 | 8.1 | 39.8 | 47.1 | 56.6 |
| 525 ordinary Portland cements | 80 | 5 | 15 | 0 | 5.2 | 6.4 | 7.2 | 34.3 | 43.8 | 53.0 |
| 80 | 5 | 10 | 5 | 5.9 | 7.4 | 7.4 | 34.9 | 45.3 | 57.4 | |
| 525 composite Portland cements | 65 | 5 | 15 | 15 | 5.4 | 6.4 | 8.1 | 27.6 | 38.6 | 55.4 |
| 50 | 5 | 15 | 30 | 5.3 | 6.7 | 8.3 | 26.0 | 37.3 | 57.1 | |
| 50 | 5 | 25 | 20 | 4.9 | 6.4 | 7.9 | 24.9 | 36.7 | 55.4 | |
| 425 dross slag cements | 35 | 5 | 30 | 30 | 3.5 | 5.7 | 7.8 | 17.6 | 29.8 | 52.4 |
Example 2: ground steel slag specific surface area 409m
2/ kg mixes the common grinding in back with cement clinker, slag, gypsum then, makes cement.Grinding is to specific surface area 310m in advance
2/ kg, levigate thin slag powders specific surface area 202m
2/ kg prepares burden, mixes according to following table, makes cement, and the pressure steaming stability that records cement is all qualified, and time of coagulation is normal, meets national standard, strength of cement such as following table:
| Cement mark | Cement specific surface area m 2/kg | Proportioning (weight %) | Folding strength (MPa) | Ultimate compression strength (MPa) | |||||||
| Grog | Gypsum | Slag | Slag | 3d | 7d | 28d | 3d | 7d | 28d | ||
| Contrast | 310 | 95 | 5 | 0 | 0 | 6.7 | 7.6 | 9.2 | 36.0 | 44.5 | 58.4 |
| Common 525 | 315 | 80 | 5 | 10 | 5 | 6.0 | 7.7 | 9.0 | 31.9 | 38.5 | 55.4 |
| Compound 525 | 310 | 65 | 5 | 15 | 15 | 5.7 | 6.9 | 7.8 | 25.9 | 33.9 | 54.9 |
| Compound 425 | 295 | 50 | 5 | 15 | 30 | 4.3 | 6.0 | 7.4 | 23.2 | 31.8 | 50.3 |
| Compound 425 | 315 | 50 | 5 | 25 | 20 | 5.0 | 6.5 | 7.3 | 26.9 | 31.8 | 48.9 |
Claims (5)
1. cement fine steelslag powder mixing material is characterized in that: described fine steelslag powder adopts levigate in advance and sorting obtains specific surface area 〉=300m
2/ kg, particle diameter less than the granule content of 40 μ m greater than 65% (weight), 7 days activity index 〉=75%, 28 day activity index 〉=80%, density=2.90-3.30g/cm
3, metal Ferrum content≤0.8% (weight), free CaO≤3% (weight).
2. the application method when the described fine steelslag powder of claim 1 is produced cement, it is characterized in that: when the preparation strength label is 525 cement, mix the ground steel slag that accounts for gross weight 10-35% and other industrial residue that accounts for gross weight 0-30%, as mixing material; When the preparation strength label is 425 cement, mixes the ground steel slag that accounts for gross weight 30-50% and account for other industrial residue of gross weight 0-35%, as mixing material; Wherein other industrial residue comprises in the Cement industry slag, flyash, volcanic ash, slag, zeolite, coal gangue, phosphorus slag commonly used, and the levigate mixing of other component of fine steelslag powder and cement is got final product.
3. a method according to claim 2 is characterized in that: except that steel-making slag powder, other each component of cement is also distinguished grinding in advance to specific surface area 300m
2More than/the kg, and then, make cement with the levigated steel-making slag powder is even according to the mixed described in the claim 2.
4. a method according to claim 2 is characterized in that: other each component of cement is distinguished grinding in advance to specific surface area 200m
2More than/the kg, and then with the levigated steel-making slag powder is even according to the mixed described in the claim 2, further grinding is in addition made cement simultaneously.
5. method according to claim 2, it is characterized in that: with the levigated steel-making slag powder and without levigated cement clinker and other each component join in the grinding machine according to the ratio described in the claim 2 simultaneously in advance, common grinding reaches total specific surface area 300m
2Make cement more than the/kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001248219A CN1167642C (en) | 2000-09-18 | 2000-09-18 | Mixed cement material with fine active steel slag powder and method of preparing high grade cement with it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001248219A CN1167642C (en) | 2000-09-18 | 2000-09-18 | Mixed cement material with fine active steel slag powder and method of preparing high grade cement with it |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1290667A CN1290667A (en) | 2001-04-11 |
| CN1167642C true CN1167642C (en) | 2004-09-22 |
Family
ID=4590687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001248219A Expired - Fee Related CN1167642C (en) | 2000-09-18 | 2000-09-18 | Mixed cement material with fine active steel slag powder and method of preparing high grade cement with it |
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|---|---|
| CN (1) | CN1167642C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531427A (en) * | 2012-01-19 | 2012-07-04 | 攀枝花钢城集团有限公司 | Steel slag cement for road and preparation method thereof |
| CN103553512A (en) * | 2013-07-22 | 2014-02-05 | 南京工业大学 | Method for producing concrete by using primary grinding steel slag active micro-powder |
| CN106088461B (en) * | 2016-06-27 | 2018-06-08 | 马鞍山华亿工程技术有限公司 | A kind of manufacturing method of heat-insulation wall plate |
| CN106746809A (en) * | 2016-12-31 | 2017-05-31 | 贵州贵鑫科技环保建材有限公司 | A kind of complex slag and preparation method thereof |
| JP6323601B1 (en) * | 2017-02-02 | 2018-05-16 | 住友大阪セメント株式会社 | Concrete composition and method for producing concrete composition |
| CN109180030A (en) * | 2018-08-29 | 2019-01-11 | 北海诚德镍业有限公司 | A kind of building cementing material and construction material |
| CN109250936A (en) * | 2018-11-20 | 2019-01-22 | 黄庆周 | A kind of construction material and application by stainless steel slag preparation |
| CN110092596A (en) * | 2019-04-23 | 2019-08-06 | 山西大学 | A kind of method and production system preparing the unburned eco-cement of solid waste base |
| CN111574075B (en) * | 2020-06-05 | 2021-12-28 | 中国建筑材料科学研究总院有限公司 | High-activity mixed material prepared from waste concrete and steel slag, and preparation method and application thereof |
-
2000
- 2000-09-18 CN CNB001248219A patent/CN1167642C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1290667A (en) | 2001-04-11 |
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