CN104692680A - Preparation method for phosphorous slag Portland cement clinker - Google Patents
Preparation method for phosphorous slag Portland cement clinker Download PDFInfo
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- CN104692680A CN104692680A CN201310658578.1A CN201310658578A CN104692680A CN 104692680 A CN104692680 A CN 104692680A CN 201310658578 A CN201310658578 A CN 201310658578A CN 104692680 A CN104692680 A CN 104692680A
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- China
- Prior art keywords
- slag
- preparation
- phosphorus
- portland cement
- raw material
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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
- 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
-
- 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
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
Abstract
The invention discloses a preparation method for phosphorous slag Portland cement clinker. The clinker is mainly prepared by mixing limestone, sulfuric acid slag, river sand, phosphorus slag and tailings according to a weight ratio of 75-80: 5.5-6.5: 1.8-2.8: 9-13: 1-4.5, wherein the sulfur acid slag is industrial waste of sulfuric acid plants; the phosphorus slag is water-quenched waste slag discharged during preparation of phosphorus by using an electric-furnace sublimation method; and the tailings are residual tailings of mining industry and contain the trace elements Pb and Zn. By using industrial wastes--the phosphorus slag, the sulfuric acid slag and the tailings as raw materials to prepare low environmental coincidence type phosphate cement clinker, the preparation method provided by the invention overcomes the problem of resource shortage of high-quality limestone, clay and iron ore, provides an ideal way for the treatment of industrial wastes, saves resources and energy sources, reduces emission of pollutants and is favorable for protecting environment and reducing cost.
Description
Technical field
The present invention relates to a kind of preparation method of phosphate slag portland cement grog, belong to field of inorganic materials.
Background technology
Cement clinker be with Wingdale and clay, ferriferous raw material for main raw material, be configured to raw material by suitable proportion, burn to part or all of melting, and the work in-process obtained through cooling.Along with the development of society, as most popular material of construction, the demand of cement is increasing, thus causes the raw material resources of producing cement clinker constantly to reduce, and the consumption of the energy and the growing amount of pollutent get more and more, thus Cement industry is made to become the enterprise of severe contamination.But the waste residues such as the byproduct of other industry are continuous discharges a large amount of wastes to society, and these wastes are normally processed by the way of burying, and this is not only easy to environment, and needs to take a large amount of spaces.
As can be seen here, prior art awaits further improving.
Summary of the invention
The present invention is the weak point avoiding above-mentioned prior art to exist, and provides a kind of preparation method of phosphate slag portland cement grog.
The technical solution adopted in the present invention is:
A preparation method for phosphate slag portland cement grog, comprises the steps:
(1), materials prepare, choose Wingdale, sulfate slag, river sand, phosphorus slag and mine tailing raw material;
(2), the mixing of raw material, by above-mentioned Wingdale, sulfate slag, river sand, phosphorus slag and mine tailing according to 75 ~ 80,5.5 ~ 6.5,1.8 ~ 2.8,9 ~ 13,1 ~ 4.5 mixing ratio by weight mix;
(3), the grinding of raw material, the above-mentioned raw material mixed is put into pulverizer and carries out grinding;
(4), the burning till of cement clinker, after above-mentioned raw material after grinding is completed preheating and predecomposition in cyclone preheater, to transfer in rotary kiln and carry out burning till of grog under cement produced with the dry method system condition.
Described sulfate slag is the industrial waste of vitriol works, and it is primarily of Fe
2o
3, SiO
2, SO
3, CaO, Al
2o
3and MgO composition, described Fe
2o
3, SiO
2, SO
3, CaO, Al
2o
3and the weight percentage of MgO is respectively: 60 ~ 65,20 ~ 26,0.6 ~ 0.9,1.2 ~ 2,1.5 ~ 2 and 1.2 ~ 1.8.
To discharge when described phosphorus slag is electric furnace distillation legal system phosphorus and through the waste residue of Water Quenching, it is primarily of CaO, SiO
2, Al
2o
3and P
2o
5composition, described CaO, SiO
2, Al
2o
3and P
2o
5weight percentage be respectively: 37 ~ 42,41 ~ 42,4.1 ~ 4.5,3.5 ~ 4.5.
Described mine tailing is the mine tailing containing Pb, Zn trace element that mining industry left behind.
CaO, SiO in the chemical composition of described phosphorus slag
2, Al
2o
3and P
2o
5, the weight percentage of each component fluctuates up and down and is no more than 1.
Owing to have employed technique scheme, the beneficial effect acquired by the present invention is:
1, the present invention utilizes trade waste phosphorus slag, sulfate slag and mine tailing to meet type phosphate cement grog to prepare low environment for starting material; not only solve the shortage of resources problem of fat lime stone, clay and iron ore; again for the process of trade waste provides desirable approach; and can economize on resources and the energy; decrease the discharge of pollutent, be conducive to protection of the environment and reduce costs.
2, the present invention is applicable to apply at nsp cement plant, and when not increasing cement manufacture plant, not changing cement industry condition, the too early formation avoided because of liquid phase causes Coating clogging, significantly improves the burn-ability of raw material, improves clinker.
3, the preparation method of phosphate slag portland cement grog provided by the invention, technique simple, easy to operate and be easy to promote.
Embodiment
The present invention calcines the method for low environmental load type Portland clinker under cement produced with the dry method system with phosphorous slag ingredient, that trade waste phosphorus slag part is replaced Wingdale, sulfate slag replaces the iron powder in cement slurry completely, and add appropriate mine tailing, then by Wingdale, sulfate slag, river sand, phosphorus slag and mine tailing raw material are mixed together grinding, carry out firing and making phosphate slag portland cement grog under cement produced with the dry method condition in rotary kiln, wherein, above-mentioned Wingdale, sulfate slag, river sand, phosphorus slag and mine tailing are according to 75 ~ 80, 5.5 ~ 6.5, 1.8 ~ 2.8, 9 ~ 13, the mixing ratio by weight of 1 ~ 4.5 mixes.
Described phosphorus slag can adopt electric furnace distil legal system phosphorus time discharge and through the waste residue of Water Quenching, under cement produced with the dry method condition, phosphorus slag be directly added in cement slurry, after combined grinding, prepare phosphate slag portland cement grog through nsp kiln calcining, wherein, phosphorus slag is primarily of CaO, SiO
2, Al
2o
3and P
2o
5composition, described CaO, SiO
2, Al
2o
3and P
2o
5weight percentage be respectively: 37 ~ 42,41 ~ 42,4.1 ~ 4.5,3.5 ~ 4.5, and the weight percentage of each component fluctuates up and down and is no more than 1.
Described mine tailing can adopt the mine tailing that be left behind by mining industry, and it is mainly containing Pb, Zn trace element.
Described sulfate slag can adopt the industrial waste of vitriol works, its its primarily of Fe
2o
3, SiO
2, SO
3, CaO, Al
2o
3and MgO composition, described Fe
2o
3, SiO
2, SO
3, CaO, Al
2o
3and the weight percentage of MgO is respectively: 60 ~ 65,20 ~ 26,0.6 ~ 0.9,1.2 ~ 2,1.5 ~ 2 and 1.2 ~ 1.8.
Below in conjunction with specific embodiment, the present invention is described in further detail, but the present invention is not limited to these embodiments.
Embodiment one: the weight proportion of each raw material is Wingdale 78, sulfate slag 6, river sand 2.5, phosphorus slag 10, mine tailing 2, the chemical composition of phosphate slag portland cement grog product obtained thus and mineral composition are in table one, and its physical and mechanical property is in table two.
Embodiment two: the weight proportion of each raw material is Wingdale 80, sulfate slag 5.8, river sand 2, phosphorus slag 12, mine tailing 3.5, the chemical composition of phosphate slag portland cement grog product obtained thus and mineral composition are in table three, and its physical and mechanical property is in table four.
The chemical composition of table one embodiment one phosphate slag portland cement grog product and mineral composition
The physical and mechanical property of table two embodiment one phosphate slag portland cement grog product
The chemical composition of table three embodiment two phosphate slag portland cement grog product and mineral composition
The physical and mechanical property of table four embodiment two phosphate slag portland cement grog product
As can be seen from the above experimental data, the present invention utilizes trade waste, and can provide a kind of and reduce unit sinter leaching hear rate, improve the seed output and quality of grog, the 28d ultimate compression strength of grog is greater than 60MPa, and has useless pollution-free, the CO of profit
2the little effect of quantity discharged, why can reach such effect be because: in phosphorus slag, the content of CaO reaches 38% ~ 45%, substantially identical with raw limestone content, and SiO
2content reaches 40% ~ 43%, and therefore phosphorus slag can Substitute For Partial Wingdale, has saved limestone resource, relatively can reduce CaCO
3energy required for decomposition, reduces heat consumption of clinker simultaneously, and energy consumption reduces, and simultaneously due to containing active calcium oxide, thus decreases CO
2quantity discharged, reduce carrying capacity of environment; Containing P in phosphorus slag
2o
53% ~ 5%, the effect of crystal technology can be played; Due to the C added
3s crystal seed can directly be grown up, and system overcomes and even eliminates formation C
3thermodynamics potential barrier needed for S critical nucleus, that is, adding of crystal seed, the system of eliminating first will form the stage of critical nucleus, thus makes C
3the time shorten that S is formed and grows, i.e. sinter leaching time shorten, in production practice, after adding crystal seed, can make the calcining of cement clinker realize high-quality, low consumption, high yield, can improve the volume of blended material like this, thus reduces carrying capacity of environment; Containing micro-institute Xu such as Pb, Zn in mine tailing, raw material can be made to burn till fusing point and to reduce, liquid phase be occurred in advance, increases liquid content, reduce liquid phase viscosity, example velocity of diffusion is accelerated greatly, newborn C
3s microcrystal defect mistake, C
3s crystal is tiny, and activity is very high, and it can play good crystal inducing action in grog firing system, facilitates C
3formed fast during S low temperature, and crystal Rapid development is complete, thus has impelled C
3s, C
2s, C
3a, CAF
4deng the forming process of mineral, be almost synchronously carry out, decrease the aging of nascent state product or passivation, avoid clinker mineral " aging " chance in forming process, thus grog firing system activation capacity reduces greatly, accelerate the speed of response of clinker mineral, make C in grog
3s at low temperatures rapid, high volume is formed; Sulfate slag is the powdery waste residue discharged after chemical plant produces sulfuric acid with sulfurous iron ore, Fe
2o
3content up to more than 60%, partly or entirely can replace the iron powder in raw material.
Need to further illustrate, specific embodiment described herein is only to spiritual example explanation of the present invention.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (5)
1. a preparation method for phosphate slag portland cement grog, is characterized in that: comprise the steps:
(1), materials prepare, choose Wingdale, sulfate slag, river sand, phosphorus slag and mine tailing raw material;
(2), the mixing of raw material, by above-mentioned Wingdale, sulfate slag, river sand, phosphorus slag and mine tailing according to 75 ~ 80,5.5 ~ 6.5,1.8 ~ 2.8,9 ~ 13,1 ~ 4.5 mixing ratio by weight mix;
(3), the grinding of raw material, the above-mentioned raw material mixed is put into pulverizer and carries out grinding;
(4), the burning till of cement clinker, after above-mentioned raw material after grinding is completed preheating and predecomposition in cyclone preheater, to transfer in rotary kiln and carry out burning till of grog under cement produced with the dry method system condition.
2. the preparation method of a kind of phosphate slag portland cement grog according to claim 1, is characterized in that: described sulfate slag is the industrial waste of vitriol works, and it is primarily of Fe
2o
3, SiO
2, SO
3, CaO, Al
2o
3and MgO composition, described Fe
2o
3, SiO
2, SO
3, CaO, Al
2o
3and the weight percentage of MgO is respectively: 60 ~ 65,20 ~ 26,0.6 ~ 0.9,1.2 ~ 2,1.5 ~ 2 and 1.2 ~ 1.8.
3. the preparation method of a kind of phosphate slag portland cement grog according to claim 1, is characterized in that: discharge when described phosphorus slag is electric furnace distillation legal system phosphorus and through the waste residue of Water Quenching, it is primarily of CaO, SiO
2, Al
2o
3and P
2o
5composition, described CaO, SiO
2, Al
2o
3and P
2o
5weight percentage be respectively: 37 ~ 42,41 ~ 42,4.1 ~ 4.5,3.5 ~ 4.5.
4. the preparation method of a kind of phosphate slag portland cement grog according to claim 1, is characterized in that: described mine tailing is the mine tailing containing Pb, Zn trace element that mining industry left behind.
5. the preparation method of a kind of phosphate slag portland cement grog according to claim 3, is characterized in that: CaO, SiO in the chemical composition of described phosphorus slag
2, Al
2o
3and P
2o
5, the weight percentage of each component fluctuates up and down and is no more than 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310658578.1A CN104692680A (en) | 2013-12-09 | 2013-12-09 | Preparation method for phosphorous slag Portland cement clinker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310658578.1A CN104692680A (en) | 2013-12-09 | 2013-12-09 | Preparation method for phosphorous slag Portland cement clinker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104692680A true CN104692680A (en) | 2015-06-10 |
Family
ID=53340285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310658578.1A Pending CN104692680A (en) | 2013-12-09 | 2013-12-09 | Preparation method for phosphorous slag Portland cement clinker |
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|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109081615A (en) * | 2018-07-11 | 2018-12-25 | 盐城工学院 | A kind of road silicate cement clinker and preparation method thereof based on industrial residue |
| CN111377623A (en) * | 2018-12-28 | 2020-07-07 | 将乐金牛水泥有限公司 | Method for adding raw fluorapatite |
-
2013
- 2013-12-09 CN CN201310658578.1A patent/CN104692680A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109081615A (en) * | 2018-07-11 | 2018-12-25 | 盐城工学院 | A kind of road silicate cement clinker and preparation method thereof based on industrial residue |
| CN109081615B (en) * | 2018-07-11 | 2021-02-09 | 盐城工学院 | Road portland cement clinker based on industrial waste residues and preparation method thereof |
| CN111377623A (en) * | 2018-12-28 | 2020-07-07 | 将乐金牛水泥有限公司 | Method for adding raw fluorapatite |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150610 |
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| WD01 | Invention patent application deemed withdrawn after publication |