CN1792973A - Gypsum tailing mine gelled material and preparation process thereof - Google Patents
Gypsum tailing mine gelled material and preparation process thereof Download PDFInfo
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- CN1792973A CN1792973A CNA2005101205137A CN200510120513A CN1792973A CN 1792973 A CN1792973 A CN 1792973A CN A2005101205137 A CNA2005101205137 A CN A2005101205137A CN 200510120513 A CN200510120513 A CN 200510120513A CN 1792973 A CN1792973 A CN 1792973A
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- gypsum
- powder
- mine
- flyash
- 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
- 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
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- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
A water-hardening cementing material is proportionally prepared from the gypsum ore tailings, the slag powder prepared from water-quenched slag and P slag through baking and grinding, powdered coal ash, trigger and early-strengthening agent through mixing.
Description
Technical field
The invention belongs to building material technical field, be specifically related to a kind of hydraulic cementing materials and preparation method thereof.
Technical background
Gypsum mine is meant that dihydrate gypsum content is lower than 50% gypsum ore, can not be used to calcine the plaster of Paris owing to contain various impurity, and become a kind of trade waste.At present, all exist in a large number in each big Gypsum Mine, both the land occupation influence was produced, again contaminate environment.Therefore, the regeneration of gypsum mine has caused people's attention.
Research was once carried out to the regeneration of gypsum mine at the initial stage eighties in yingcheng gypsum ore deposit, Hubei Province.The method of its preparation is: gypsum mine makes dihydrate gypsum be transformed into dehydrated gyp-through high temperature (greater than 800 ℃) calcining, again admixture cement and other admixtures.But because goods poor water resistance and the scum phenomenon occurs fails to enter practical stage.By research, its reason of initial analysis is: (1) calcining temperature is too high, makes the initial water-filling of mineralization body space too little, causes the hardenite structural stability relatively poor; (2) feldspar is because of high-temperature calcination, and crystalline structure is destroyed, and makes Na
+, K
+Ion obtains activation, easy and SO
4 2-In conjunction with generating saltcake.So the calcined gypsum mine tailing prepares the test of gelling material and fails to succeed.
Summary of the invention
The object of the present invention is to provide low gypsum tailing mine gelled material of a kind of cost and preparation method thereof.
To achieve these goals, technical scheme of the present invention is: gypsum tailing mine gelled material, it is characterized in that it is mainly mixed by gypsum mine powder, slag powders, flyash, exciting agent and hardening accelerator raw material, the shared mass percent of each raw material of gypsum mine powder, slag powders and flyash is: gypsum mine powder 50-70, slag powders 20-40, flyash 9-11; External excitation agent and hardening accelerator, the 0.8-1.2% of the shared gypsum mine powder of exciting agent, slag powders and flyash quality, the 1.3-1.7% of the shared gypsum mine powder of hardening accelerator, slag powders and flyash quality; The gypsum mine powder is for to be crushed to particle diameter less than 10mm with gypsum mine, and levigate then is 15% fine powder to 0.08mm square hole sieve screen over-size; Slag powders be the oven dry of water-granulated slag or phosphorus slag levigate to specific surface area greater than 4000cm
2The fine powder of/g.
Described exciting agent is unslaked lime or slaked lime.Described hardening accelerator is levigated alum stone flour or alum powder.
The preparation method of gypsum tailing mine gelled material is characterized in that it comprises the steps: 1). the preparation of gypsum mine powder: gypsum mine is crushed to particle diameter less than 10mm, and levigate then is that 15% fine powder is standby to 0.08mm square hole sieve screen over-size; 2). the preparation of slag powders: with the oven dry of water-granulated slag or phosphorus slag levigate to specific surface area greater than 4000cm
2/ g standby (only needing lower control limit to get final product); 3). by the shared mass percent of each raw material of gypsum mine powder, slag powders and flyash be: gypsum mine powder 50-70, slag powders 20-40, flyash 9-11 chooses gypsum mine powder, slag powders, flyash; Press the 0.8-1.2% of the shared gypsum mine powder of exciting agent, slag powders and flyash quality, the 1.3-1.7% of the shared gypsum mine powder of hardening accelerator, slag powders and flyash quality, choose exciting agent and hardening accelerator, mix, get product (packing can be dispatched from the factory) with mixer.
Can use by the water cement ratio mix of 0.2-0.3 or the aggregate that mixes the 20%-30% of quality product of the present invention during use.
The technological line that the present invention adopts is: gypsum mine is without calcining, and directly levigate and a certain proportion of ground slag, flyash mix, under the compound activator effect, and preparation hydraulicity gelling material material.
The hydration and hardening process of gelling material is done description below: after agglutination material is met water, and Al
2(SO
4)
3, Ca (OH)
2Dissolving fast, dihydrate gypsum dissolves thereupon, and exist Ca in the liquid phase this moment
2+, SO
4 2-And OH
-, part microcrystal such as C in the solid phase
2S, CA also begin aquation:
Simultaneously, the slag surface begins dissolving.The solvable silane agent of slag glass body micro free at first is dissolved in solution, simultaneously, and the OH in the vitreous surface absorbent solution
-, when adsorptive capacity acquired a certain degree, Al-O, Si-O chain were opened in the vitreum reticulated structure, and following reaction takes place in the vitreous surface dissolving of disintegrating gradually as a result:
The drated calcium aluminate initial stage that generates is with C
3AH
6Form exists, and changes C in alkali lye into
4AH
13, with the gypsum reaction generation ettringite in the solution.
When aquation continues to proceed, vitreum successively dissolves, and hydrated product increases gradually, and ettringite is a support with slag glass body (also comprising other particle), is the radiation growth.The ettringite crystal overlap joint intersected with each other that forms forms the space reticulated structure around particle.Simultaneously, hydrated calcium silicate is also in a large amount of formation, and hydrated calcium silicate is filled between the crystallization net of ettringite, plays bonding effect, and dispersive crystallization net is linked to be an integral body.Hydrated calcium silicate and ettringite interweave chain mutually, constitute the early stage structure of hardenite jointly.
Along with the carrying out of reaction, under alkali lye constantly corroded, the dense structure layer on fly vitreous surface disintegrated finally, and fly vitreous begins aquation dissolving gradually in the hole that the slag hydrate forms.
Agglutination material hardenite final product is hydrated calcium silicate gel and ettringite, also has a large amount of gypsum, anhydrite, quartz, feldspar and unhydrated glass microballon.Wherein, the CSH gel plays a major role to the formation of agglutination material intensity, and it is bonded together ettringite crystalline texture net, and is filled in hole, particle is bonded together make agglutination material form a closely knit high-strength hardenite.
The present invention can utilize gypsum mine in a large number, and production technique is simple, production cost is low.Prepared gelling material is moderate time of coagulation, the intensity height, and water-tolerant can be widely used in various worker China Democratic National Construction Association engineering.
The performance of gypsum tailing mine gelled material: see the following form
| Intensity (28d) | Presetting period (min) | Final setting time (min) | Apparent density (kg/m 3) | Coefficient of softening | Water-intake rate (%) | Contract with dry rate (mm/m) | |
| Anti-folding | Resistance to compression | ||||||
| 4.4 | 41.2 | 190min | 208min | 1785 | 0.85 | 1.09 | 0.2 |
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
Embodiment 1:
As shown in Figure 1, the preparation method of gypsum tailing mine gelled material, it comprises the steps: 1). the preparation of gypsum mine powder: gypsum mine is crushed to particle diameter less than 10mm, and levigate then is that 15% fine powder is standby to 0.08mm square hole sieve screen over-size; 2). the preparation of slag powders: the water-granulated slag oven dry of iron and steel enterprise's discharging is levigate to specific surface area 4001-8000cm
2/ g is standby; 3). with mass ratio is 60% gypsum mine powder, and mass ratio is 30% ground slag powder, and mass ratio is 10% butt flyash; Mix 1% exciting agent (unslaked lime) of shared gypsum mine powder, slag powders and flyash quality and 1.5% hardening accelerator (levigated alum stone flour) outward and mix with mixer, packing can be dispatched from the factory.Can use by the water cement ratio mix of 0.2-0.3 or the aggregate that mixes the 20%-30% of quality product of the present invention during use.
Embodiment 2:
The preparation method of gypsum tailing mine gelled material, it comprises the steps: 1). the preparation of gypsum mine powder: gypsum mine is crushed to particle diameter less than 10mm, and levigate then is that 15% fine powder is standby to 0.08mm square hole sieve screen over-size; 2). the preparation of slag powders: with water-granulated slag dry levigate to specific surface area greater than 4000cm
2/ g is standby; 3). with mass ratio 70% gypsum mine powder, mass ratio is 20% ground slag powder, mass ratio is 10% butt flyash, mix 0.8% exciting agent (unslaked lime) of shared gypsum mine powder, slag powders and flyash quality and 1.3% hardening accelerator (calcined alunite outward, pulverize) mix with mixer, packing can be dispatched from the factory.Can use by the water cement ratio mix of 0.2-0.3 or the aggregate that mixes the 20%-30% of quality product of the present invention during use.
Embodiment 3:
The preparation method of gypsum tailing mine gelled material, it comprises the steps: 1). the preparation of gypsum mine powder: gypsum mine is crushed to particle diameter less than 10mm, and levigate then is that 15% fine powder is standby to 0.08mm square hole sieve screen over-size; 2). the preparation of slag powders: with phosphorus slag dry levigate to specific surface area greater than 4000cm
2/ g is standby; 3). with mass ratio 60% gypsum mine powder, mass ratio is 30% ground slag powder, mass ratio is 10% butt flyash, mix 1.2% exciting agent (slaked lime) of shared gypsum mine powder, slag powders and flyash quality and 1.7% hardening accelerator (alum powder) outward and mix with mixer, packing can be dispatched from the factory.Can use by the water cement ratio mix of 0.2-0.3 or the aggregate that mixes the 20%-30% of quality product of the present invention during use.
The bound value and the interval value of gypsum mine powder of the present invention, slag powders, flyash, exciting agent, hardening accelerator raw material can both be realized the present invention, just do not enumerate embodiment one by one at this.
Claims (4)
1. gypsum tailing mine gelled material, it is characterized in that it is mainly mixed by gypsum mine powder, slag powders, flyash, exciting agent and hardening accelerator raw material, the shared mass percent of each raw material of gypsum mine powder, slag powders and flyash is: gypsum mine powder 50-70, slag powders 20-40, flyash 9-11; External excitation agent and hardening accelerator, the 0.8-1.2% of the shared gypsum mine powder of exciting agent, slag powders and flyash quality, the 1.3-1.7% of the shared gypsum mine powder of hardening accelerator, slag powders and flyash quality; The gypsum mine powder is for to be crushed to particle diameter less than 10mm with gypsum mine, and levigate then is 15% fine powder to 0.08mm square hole sieve screen over-size; Slag powders be with the oven dry of water-granulated slag or phosphorus slag levigate to specific surface area greater than 4000cm
2The fine powder of/g.
2. gypsum tailing mine gelled material according to claim 1 is characterized in that: described exciting agent is unslaked lime or slaked lime.
3. gypsum tailing mine gelled material according to claim 1 is characterized in that: described hardening accelerator is levigated alum stone flour or alum powder.
4. the preparation method of gypsum tailing mine gelled material as claimed in claim 1, it is characterized in that it comprises the steps: 1). the preparation of gypsum mine powder: gypsum mine is crushed to particle diameter less than 10mm, and levigate then is that 15% fine powder is standby to 0.08mm square hole sieve screen over-size; 2). the preparation of slag powders: with the oven dry of water-granulated slag or phosphorus slag levigate to specific surface area greater than 4000cm
2/ g is standby; 3). by the shared mass percent of each raw material of gypsum mine powder, slag powders and flyash be: gypsum mine powder 50-70, slag powders 20-40, flyash 9-11 chooses gypsum mine powder, slag powders, flyash; Press the 0.8-1.2% of the shared gypsum mine powder of exciting agent, slag powders and flyash quality, the 1.3-1.7% of the shared gypsum mine powder of hardening accelerator, slag powders and flyash quality chooses exciting agent and hardening accelerator, mixes with mixer, gets product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101205137A CN1792973A (en) | 2005-12-23 | 2005-12-23 | Gypsum tailing mine gelled material and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101205137A CN1792973A (en) | 2005-12-23 | 2005-12-23 | Gypsum tailing mine gelled material and preparation process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1792973A true CN1792973A (en) | 2006-06-28 |
Family
ID=36804639
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005101205137A Pending CN1792973A (en) | 2005-12-23 | 2005-12-23 | Gypsum tailing mine gelled material and preparation process thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100531945C (en) * | 2006-08-08 | 2009-08-26 | 中国铝业股份有限公司 | Bauxite tail piling method |
| CN101671132B (en) * | 2009-09-29 | 2011-10-12 | 北京科技大学 | Fish reef cementing material containing nano-tailings and preparation method thereof |
| CN101468901B (en) * | 2007-12-28 | 2012-09-05 | 同济大学 | Method for preparing novel plastering material for surface layer and bottom layer |
| CN103539423A (en) * | 2013-11-04 | 2014-01-29 | 江苏坤泽科技股份有限公司 | Sludge curing material for comprehensively utilizing phosphorous gypsum |
| CN104496212A (en) * | 2014-11-25 | 2015-04-08 | 广西鱼峰水泥股份有限公司 | Highly active mineral powder formula |
| CN104876524A (en) * | 2015-05-12 | 2015-09-02 | 胡安治 | Ozone biological material |
-
2005
- 2005-12-23 CN CNA2005101205137A patent/CN1792973A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100531945C (en) * | 2006-08-08 | 2009-08-26 | 中国铝业股份有限公司 | Bauxite tail piling method |
| CN101468901B (en) * | 2007-12-28 | 2012-09-05 | 同济大学 | Method for preparing novel plastering material for surface layer and bottom layer |
| CN101671132B (en) * | 2009-09-29 | 2011-10-12 | 北京科技大学 | Fish reef cementing material containing nano-tailings and preparation method thereof |
| CN103539423A (en) * | 2013-11-04 | 2014-01-29 | 江苏坤泽科技股份有限公司 | Sludge curing material for comprehensively utilizing phosphorous gypsum |
| CN104496212A (en) * | 2014-11-25 | 2015-04-08 | 广西鱼峰水泥股份有限公司 | Highly active mineral powder formula |
| CN104876524A (en) * | 2015-05-12 | 2015-09-02 | 胡安治 | Ozone biological material |
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