CN1267372C - Gangue active mixed material, its preparation method and high-performance cement - Google Patents
Gangue active mixed material, its preparation method and high-performance cement Download PDFInfo
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- CN1267372C CN1267372C CNB2004101015087A CN200410101508A CN1267372C CN 1267372 C CN1267372 C CN 1267372C CN B2004101015087 A CNB2004101015087 A CN B2004101015087A CN 200410101508 A CN200410101508 A CN 200410101508A CN 1267372 C CN1267372 C CN 1267372C
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- coal gangue
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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
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- 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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Abstract
The present invention discloses a coal gangue active composite material used in cement concrete with high performance and a preparation process of the coal gangue active composite material. The preparation process of the coal gangue active composite material comprises the steps of calcining 80 to 97 wt% of raw material coal gangue and 3 to 20 wt% of limestone and/or dolomite under 600 to 1000 DEG C; mixing and milling 85 to 100 wt% of the obtained calcined sample and 0 to 15 wt% of calcium lime. The present invention also simultaneously discloses cement with high performance, which is formed by mixing 30 wt% to 40 wt% of the coal gangue active composite material and 70 wt% to 60 wt% of portland cement, and the cement with high performance can reach 52.5 and 42.5 strength grades. The components contained in the coal gangue active composite material of the present invention are basically the same as the components contained in the portland cement. The coal gangue active composite material does not contain harmful components which influence the performance of the cement concrete, and thus, the coal gangue active composite material becomes a performance adjusting type auxiliary gel component used for cement concrete with high performance, which is one of the distinctive characteristics of the present invention. The preparation method of the coal gangue active composite material is simple and easy. Draining and stocking problems of coal gangue are reasonably solved, and the economic benefit and the environmental benefit are obvious.
Description
Technical field
The present invention relates to material of construction, particularly active addition in the Cement industry and preparation method thereof, and the novel high-performance cement that forms by this active addition.
Background technology
Along with the development of cement concrete technology, cement concrete just develops towards the direction of high performance.The high-performance cement concrete should have low carrying capacity of environment, high intensity and excellent distinguishing features such as weather resistance.Low carrying capacity of environment is mainly reflected in the energy and resource consumption is low, specifically is exactly admixture blended material as much as possible in the cement concrete, guarantees that simultaneously cement concrete has high intensity and excellent weather resistance.Therefore, this just requires high-performance cement concrete composition proportioning to be different from portland cement concrete, and the high-performance cement concrete especially to the characteristic of blended material or adulterant, all has particular requirement to the characteristic of used component simultaneously.Blended material or adulterant that some can be used in portland cement concrete just are not suitable for the high-performance cement concrete.
The domestic quantity of storing up of coal gangue has reached about 3,000,000,000 tons, takes up an area of 1.1 hundred million m
2, annual newly-increased more than 100,000,000 ton of national colliery.So the coal gangue of quantity not only takies a large amount of soils, and contaminate environment.Therefore, the recycling of coal gangue is being paid close attention to of numerous scholars and engineering technical personnel.But undeniable is that coal gangue recycling problem never is solved.Building material field has the big unique advantage of material usage, if therefore can change into coal gangue the high-activity component of cement concrete, just can thoroughly solve the discharging of coal gangue and store up problem.Yet though through research for many years and practice, above-mentioned research is the progress of achieving no breakthrough property still.
About active coal spoil and preparation thereof, there is patent application CN1236748A to disclose the treatment process that a kind of calcining coal gangue is produced active mixed material, promptly making active mixed material behind the calcined coal gangue, but this method does not have embodiment.Another patent application CN1156130A discloses a kind of manufacture method of early-strength gangue cement with high content of adulterant, 40～70% (weight %) coal gangues and 25～55% (weight %) cement clinkers and 3～15% (weight %) exciting agent combined grinding are made this kind cement, and exciting agent is very important, indispensable component in this method.Yet components such as alkali in the exciting agent and vitriol will have a negative impact to cement or durability of concrete.This has limited the use of this kind early-strength gangue cement with high content of adulterant.
The innovation and creation content
The purpose of this invention is to provide a kind of gangue active mixed material that does not in use contain the unwanted component that influences cement concrete performance and preparation method thereof.
Gangue active mixed material of the present invention, 600～1000 ℃ of calcinings, the calcining sample 85～100wt% that obtains mixes with the unslaked lime of 0～15wt%, grinding makes by the Wingdale of 80～97wt% feed coal spoil, 3～20wt% and/or rhombspar.
Wherein, CaO content surpasses 35% in described Wingdale or the rhombspar.
The preparation method of gangue active mixed material of the present invention comprises the steps:
1) mix: feed coal spoil, Wingdale and/or rhombspar are mixed according to weight percent;
2) calcining: said ratio gained sample is calcined in High Temperature Furnaces Heating Apparatus, and calcining temperature is controlled at 600 ℃～1000 ℃;
3) combined grinding: calcining sample mixes with 0～15% unslaked lime according to weight percent 85～100%, grinding in ball mill, and grinding fineness tails in 10.0% scope with the control of 45 μ m sieve, promptly obtains gangue active mixed material of the present invention.
Another object of the present invention provides the high-performance cement of being made up of above-mentioned gangue active mixed material.
High-performance cement of the present invention is that the silicate cement by 30wt%～40wt% gangue active mixed material provided by the invention and 60wt%～70wt% mixes.
Adopt technique scheme, through experimental verification, coal gangue blended material with the inventive method preparation mixes the high-performance cement that obtains with Portland cement, mix back 28 days ultimate compression strength with Portland cement than common incinerating coal gangue and improve 8～11MPa, the strength grade of gained high-performance cement of the present invention has all reached GB 42.5 and 52.5 strength grade requirements.
The component fundamental sum silicate cement that contains in the gangue active mixed material of the present invention's preparation is consistent, do not contain the unwanted component that influences cement concrete performance, make it become the high-performance cement concrete and assist bonding component with the property regulation type, this is one of distinguishing feature of the present invention.
The present invention prepares gangue active mixed material, and method is simple, and rationally solved the discharging of coal gangue and stored up economic benefit and obvious environment benefit.
Embodiment
The present invention at first provides a kind of preparation method of active coal spoil blended material.Among the present invention, described active coal spoil blended material is the blended material that is used for the high-performance cement concrete, be in the coal gangue raw material, to mix Wingdale and/or rhombspar, then in 600 ℃～1000 ℃ scopes of temperature, calcine, will calcine behind the common grinding of sample and unslaked lime and make.
In preparation process, feed coal spoil consumption is in 80～97wt% scope before the calcining, Wingdale and/or rhombspar consumption are in 3～20wt% scope, and then calcining coal gangue 85～100wt% and unslaked lime 0～15wt% mixed grinding in ball mill and obtain gangue active mixed material of the present invention.
The step of preparation gangue active mixed material is specially:
1, mix: with coal gangue 80～97% and Wingdale and/or rhombspar 3～20% batchings, mix according to weight percent;
2, calcining: said ratio gained sample is calcined in High Temperature Furnaces Heating Apparatus, and calcining temperature is controlled at 600 ℃～1000 ℃;
3, combined grinding: calcining sample mixes with 0～15% unslaked lime according to weight percent 85～100%, grinding in ball mill, and grinding fineness tails in 10.0% scope with the control of 45 μ m sieve, promptly obtains gangue active mixed material of the present invention.
The present invention also provides a kind of high-performance cement, is that gangue active mixed material by 30wt%～40wt% mixes with the silicate cement of 70wt%～60wt% and the high-performance cement that obtains.
Below be embodiments of the invention:
Embodiment 1: 97 kg feed material coal gangues (taking from the Xuzhou), 3 kilograms of Wingdales are mixed, calcined 1.0 hours down at 1000 ℃, naturally after cooling to room temperature, take out 85 kilograms and mix back grinding in ball mill with 15 kilogram of raw lime, cross 45 μ m sieve, tail in 10.0% scope, mixing screen gets powder and promptly obtains this routine gangue active mixed material.
Get 30 kilograms and 70 kilograms ordinary Portland cements of this routine gangue active mixed material and mix, obtain this routine high-performance cement A-2; Get 40 kilograms and 60 kilograms ordinary Portland cements of this routine active mixed flyash material and mix, obtain this routine high-performance cement A-4.
This routine high-performance cement is carried out strength test, to verify the coal gangue mixture activity of the present invention and the quality of high-performance cement.Wherein, A-1, A-3 are for comparing sample in the specimen, and A-1 is the mixture of 70wt% silicate cement and the common calcining coal gangue of 30wt%, and A-3 is the mixture of 60wt% silicate cement and the common calcining coal gangue of 40wt%.The method of standard GB/T17671-1999 regulation is adopted in strength test: the sample of 95% quality and the natural dihydrate gypsum of 5% quality mixed, and grinding in ball mill, specific surface area reaches 340m
2/ kg～360m
2Test intensity behind the/kg.Test result sees Table 1.
Table 1
| Sample number into spectrum | Folding strength (MPa) | Ultimate compression strength (MPa) | ||
| 3 days | 28 days | 3 days | 28 days | |
| A-1 A-2 A-3 A-4 | 5.0 5.8 4.0 5.4 | 8.6 8.6 7.5 9.4 | 26.9 28.8 19.2 25.5 | 50.2 58.2 44.6 55.7 |
Annotate: A-1-70% silicate cement+30% calcining coal gangue
The coal gangue of A-2-70% silicate cement+30% the inventive method preparation;
A-3-60% silicate cement+40% calcining coal gangue
The coal gangue of A-4-60% silicate cement+40% the inventive method preparation.
Learn that from table 1 data calcining coal gangue is the admixture limestone calcination whether, there are notable difference in the calcining sample of gained and silicate cement compound performance.Under the situation of volume 30%, the high 8.0MPa of 28 days compressive strength rate A-1 of sample A-2, its strength grade reaches the requirement of GB 52.5; Under the situation of volume 40%, 28 days high 11.1MPa of compressive strength rate A-3 of sample A-4, its strength grade has reached the requirement of GB 42.5.
Embodiment 2
80 kg feed material coal gangues (taking from the Xuzhou), 20 kilograms of Wingdales are mixed, calcined 1.0 hours down at 800 ℃, naturally after cooling to room temperature, take out back grinding in ball mill, cross 45 μ m sieve, tail in 10.0% scope, mixing screen gets powder and promptly obtains this routine gangue active mixed material.
Get 35 kilograms and 65 kilograms silicate cement B-1 of this routine gangue active mixed material (taking from Lafarge cement mill, Beijing) and mix, obtain this routine high-performance cement B-2; Get 30 kilograms and 70 kilograms silicate cement B-3 of this routine coal gangue blended material (taking from Hubei Huaxin Cement Factory) and mix, obtain this routine high-performance cement B-4.
Adopt the method identical with embodiment 1 that this routine high-performance cement is carried out strength test, and the contrast silicate cement contrasts, test result sees Table 2.
Table 2
| Numbering | Folding strength (MPa) | Ultimate compression strength (MPa) | ||
| 3 days | 28 days | 3 days | 28 days | |
| B-2 B-4 | 5.5 5.4 | 9.1 9.5 | 30.6 30.1 | 59.1 60.2 |
The high-performance cement that obtains after compound with the gangue active mixed material of the silicate cement in different cement mill and the preparation of this example in the table 2, its intensity data shows that this cement reaches GB 52.5 strength grade requirements.
Embodiment 3
90 kg feed material coal gangues (taking from Huozhou, Shanxi, Yangquan, Shanxi respectively), 10 kilograms of Wingdales are mixed, calcined 1.0 hours down at 850 ℃, naturally after cooling to room temperature, take out 90 kilograms respectively and mix back grinding in ball mill with 10 kilogram of raw lime, cross 45 μ m sieve, tail in 10.0% scope, mixing screen gets powder and promptly obtains this routine gangue active mixed material.
Get 30 kilograms of this routine gangue active mixed materials (Yangquan, Shanxi) and 70 kilograms of ordinary Portland cements respectively and mix, obtain this routine high-performance cement C-2 (Yangquan, Shanxi); Get 30 kilograms of this routine active mixed flyash materials (Huozhou, Shanxi) and 70 kilograms of ordinary Portland cements and mix, obtain this routine high-performance cement C-4 (Huozhou, Shanxi).The contrast sample is C-1 (coal gangue 30wt% in Yanzhou mixes with silicate cement 70wt% after the common calcining), C-3 (common calcining back river Nanzheng state coal gangue 30wt% mixes with silicate cement 70wt%).
Adopt the method identical with embodiment 1 that this routine high-performance cement is carried out strength test, test result sees Table 3.
Table 3
| Numbering | Folding strength (MPa) | Ultimate compression strength (MPa) | ||
| 3 days | 28 days | 3 days | 28 days | |
| C-4 Yanzhou, Huozhou, C-2 Shanxi, Yangquan, Shanxi C-1 Henan Zhengzhou C-3 | 6.8 7.9 6.9 6.6 | 11.6 12.1 10.3 9.3 | 37.7 39.3 35.2 36.0 | 70.3 73.3 65.7 61.7 |
Embodiment 4
95 kg feed material coal gangues (taking from the Xuzhou), 5 kilograms of rhombspars are mixed, calcined 1.0 hours down at 900 ℃, naturally after cooling to room temperature, take out 95 kilograms and mix back grinding in ball mill with 5 kilogram of raw lime, cross 45 μ m sieve, tail in 10.0% scope, mixing screen gets powder and promptly obtains this routine gangue active mixed material.
Get 30 kilograms and 70 kilograms ordinary Portland cements of this routine gangue active mixed material and mix, obtain this routine high-performance cement D-2; Get 40 kilograms and 60 kilograms ordinary Portland cements of this routine active mixed flyash material and mix, obtain this routine high-performance cement D-4.
Adopt the method identical with embodiment 1 that this routine high-performance cement is carried out strength test, test result sees Table 4.
Table 4
| Numbering | Folding strength (MPa) | Ultimate compression strength (MPa) | ||
| 3 days | 28 days | 3 days | 28 days | |
| D-2 D-4 | 6.2 5.2 | 9.8 8.9 | 30.5 25.9 | 59.7 51.3 |
Table 4 data show that the performance index of using the inventive method to prepare gained gangue active mixed material and the compound back of silicate cement gained cement after mixing with rhombspar and feed coal spoil reach the cement standard requirement of national different grades equally.
Embodiment 5
95 kg feed material coal gangues (taking from the Xuzhou), 2 kilograms of rhombspars, 3 kilograms of Wingdales are mixed, calcining is 0.5 hour under 900 ℃ in φ 20 * 400cm rotary kiln, naturally after cooling to room temperature, change grinding in ball mill over to, cross 45 μ m sieve, tail in 10.0% scope, mixing screen gets powder and promptly obtains this routine gangue active mixed material.
Get 30 kilograms and 70 kilograms ordinary Portland cements of this routine gangue active mixed material and mix, obtain this routine high-performance cement E-2; Get 40 kilograms and 60 kilograms ordinary Portland cements of this routine active mixed flyash material and mix, obtain this routine high-performance cement E-4.
Adopt the method identical with embodiment 1 that this routine high-performance cement is carried out strength test, test result sees Table 5.
Table 5
| Numbering | Folding strength (MPa) | Ultimate compression strength (MPa) | ||
| 3 days | 28 days | 3 days | 28 days | |
| E-2 E-4 | 5.7 4.7 | 8.7 8.5 | 31.0 25.2 | 59.9 56.1 |
This example is the inventive method is implemented gained on φ 20 * 400cm rotary kiln result.The result shows that this example gained cement intensity grade has all reached GB 52.5 strength grade requirements.
Embodiment 6
90 kg feed material coal gangues (taking from the Xuzhou), 5 kilograms of rhombspars, 5 kilograms of Wingdales are mixed, 800 ℃ of calcinings 5.0 hours down on industrial shuttle kiln, naturally after cooling to room temperature, take out 90 kilograms and be blended in grinding in the ball mill with 10 kilogram of raw lime, cross 45 μ m sieve, tail in 10.0% scope, mixing screen gets powder and promptly obtains this routine gangue active mixed material.
Get 30 kilograms and 70 kilograms ordinary Portland cements of this routine gangue active mixed material and mix, obtain this routine high-performance cement F-2; Get 40 kilograms and 60 kilograms ordinary Portland cements of this routine active mixed flyash material and mix, obtain this routine high-performance cement F-4.
Adopt the method identical with embodiment 1 that this routine high-performance cement is carried out strength test, test result sees Table 6.
Table 6
| Numbering | Folding strength (MPa) | Ultimate compression strength (MPa) | ||
| 3 days | 28 days | 3 days | 28 days | |
| F-2 F-4 | 5.6 4.7 | 8.9 7.8 | 32.1 27.1 | 55.1 47.9 |
Embodiment 6 is the inventive method implementation results on industrial shuttle kiln.Coal gangue is calcined on industrial shuttle kiln, and calcining temperature is controlled at about 800 ℃.The result shows that this example gained cement intensity grade reaches GB 52.5 or 42.5 strength grade requirements respectively.
Claims (4)
1, a kind of gangue active mixed material, 600～1000 ℃ of calcinings, the calcining sample 85～100wt% that obtains mixes with the unslaked lime of 0～15wt%, grinding makes by the Wingdale of 80～97wt% feed coal spoil, 3～20wt% and/or rhombspar.
2, active mixed flyash material according to claim 1 is characterized in that, CaO content surpasses 35% in described Wingdale or the rhombspar.
3, the preparation method of a kind of claim 1 or 2 described gangue active mixed materials is characterized in that, comprises the steps:
1) mix: feed coal spoil, Wingdale and/or rhombspar are mixed according to weight percent;
2) calcining: said ratio gained sample is calcined in High Temperature Furnaces Heating Apparatus, and calcining temperature is controlled at 600 ℃～1000 ℃;
3) combined grinding: calcining sample mixes with 0～15% unslaked lime according to weight percent 85～100%, grinding in ball mill, and grinding fineness tails in 10.0% scope with the control of 45 μ m sieve, promptly obtains gangue active mixed material of the present invention.
4, a kind of high-performance cement is to be mixed by the gangue active mixed material as claimed in claim 1 or 2 of 30wt%～40wt% and the silicate cement of 60wt%～70wt%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109956737A (en) * | 2019-05-15 | 2019-07-02 | 中南大学 | A method of active mixed material is prepared using belt type roasting machine pelletizing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351446A (en) * | 2011-07-20 | 2012-02-15 | 盐城工学院 | Preparation method of gangue active mixed material |
| CN103193401A (en) * | 2013-04-28 | 2013-07-10 | 韶关市柏林再生资源开发有限公司 | Preparation method for high-activity coal gangue cementing material |
| CN103964714B (en) * | 2014-04-25 | 2016-04-13 | 华北理工大学 | A kind of method utilizing calcium sulfite type desulphurization gypsum to prepare high-performance gypsum based composite cementing material |
| CN109054187A (en) * | 2018-09-04 | 2018-12-21 | 合肥斯姆雷品牌管理有限公司 | Compound flabellum of a kind of stone modeling and preparation method thereof |
| CN110078401B (en) * | 2019-05-15 | 2020-02-14 | 中南大学 | Process for preparing active mixed material by belt sintering of coal gangue |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109956737A (en) * | 2019-05-15 | 2019-07-02 | 中南大学 | A method of active mixed material is prepared using belt type roasting machine pelletizing method |
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Assignee: Beijing Kasen Jianyan Building Materials Engineering Design Co. Ltd. Assignor: China Building Material Science Institute Contract fulfillment period: 2007.12.31 to 2012.12.31 contract change Contract record no.: 2009110000128 Denomination of invention: Gangue active mixed material, its preparation method and high-performance cement Granted publication date: 20060802 License type: Exclusive license Record date: 2009.6.2 |
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