CN103833254B - As the method for modifying of the phosphogypsum of cement setting retarder - Google Patents
As the method for modifying of the phosphogypsum of cement setting retarder Download PDFInfo
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- CN103833254B CN103833254B CN201410110823.XA CN201410110823A CN103833254B CN 103833254 B CN103833254 B CN 103833254B CN 201410110823 A CN201410110823 A CN 201410110823A CN 103833254 B CN103833254 B CN 103833254B
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- phosphogypsum
- present
- setting retarder
- cement setting
- modifying
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Abstract
The invention provides a kind of method of modifying being used as the phosphogypsum of cement setting retarder, fully mix with the lime powder of 60 parts in mass, after granulation with the phosphogypsum raw material of 1000 parts in mass, slaking 7-10 days, curing temperature is 40-50 DEG C, make the modified ardealite that pH value is 6.0-8.0, as cement setting retarder.Present invention also offers application method of the present invention.Present invention achieves comprehensive utilization of resources, waste residue is become useful resources, add economic benefit, decrease environmental pollution, protect natural, ecological.
Description
Technical field
The present invention relates to cement setting retarder, particularly relate to a kind of method of modifying being used as the phosphogypsum of cement setting retarder.
Background technology
At wet-method phosphoric acid, produce in calcium hydrophosphate fodder process; the industrial residue (phosphogypsum) of some amount can be produced; the disposal of prior art to phosphogypsum concentrates to stack; both land resources was wasted; certain pollution can be caused again to soil, water source, air; being badly in need of one makes dangerous waste residue become useful resources, effective decreasing pollution, economize the land resource, the technical scheme of conservation of nature ecotope.
Summary of the invention
The object of the invention is to for deficiency of the prior art, a kind of method of modifying being used as the phosphogypsum of cement setting retarder is provided.
For achieving the above object, the invention provides a kind of method of modifying being used as the phosphogypsum of cement setting retarder, fully mix with the lime powder of 60 parts in mass, after granulation with the phosphogypsum raw material of 1000 parts in mass, slaking 7-10 days, curing temperature is 40-50 DEG C, makes the modified ardealite that pH value is 6.0-8.0.
Further, phosphogypsum raw material is preparing phosphoric acid, produces the phosphogypsum produced in calcium hydrophosphate fodder process, and in described phosphogypsum raw material, the content of terra alba is more than or equal to 65% in massfraction;
Further, the water content of modified ardealite is not more than 15% in massfraction.
Compared with prior art, the invention has the beneficial effects as follows: achieve comprehensive utilization of resources, waste residue is become useful resources, add economic benefit, decrease environmental pollution, protect natural, ecological.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Below in conjunction with each embodiment shown in the drawings, the present invention is described in detail; but should be noted that; these embodiments are not limitation of the present invention; those of ordinary skill in the art are according to these embodiment institute work energy, method or structural equivalent transformations or substitute, and all belong within protection scope of the present invention.
Shown in ginseng Fig. 1, Fig. 1 is process flow sheet of the present invention.
In the present embodiment, with the phosphogypsum raw material of 1000 parts in mass fully mix with the lime powder of 60 parts in mass, after granulation, slaking 7-10 days, curing temperature is 40-50 DEG C, makes the modified ardealite that pH value is 6.0-8.0, as cement setting retarder.Phosphogypsum through modification is also applicable to cement, non-burning brick, finishing material production simultaneously.
Preferably, phosphogypsum raw material is preparing phosphoric acid, produces the phosphogypsum produced in calcium hydrophosphate fodder process, and in described phosphogypsum raw material, the content of terra alba is more than or equal to 65% in massfraction.
Preferably, the water content of modified ardealite is not more than 15% in massfraction.
In the present embodiment, the phosphogypsum as cement setting retarder through modification should meet following condition:
1) granularity: product cut size 10 ㎜ ~ 40 ㎜, its massfraction >=80%;
2) water-soluble Vanadium Pentoxide in FLAKES (P2O5) content (massfraction)≤0.15%;
3) terra alba (CaSO4.2H2O) content (massfraction) >=65%;
4) attached water (H2O) content (massfraction)≤15%;
5) modified ardealite setting retarder for cement should meet following table regulation to the impact of cement performance:
| Test subject | Performance test index |
| Time of coagulation | Time expand, is less than 1h |
| Standard consistency water requirement | Absolute increasing degree is less than 1% |
| Boil and boil stability | Conclusion is constant |
| Cement mortar ultimate compression strength | The reduction amplitude of 3d and 28d is not more than 5% |
The present invention, by providing a kind of method of modifying being used as the phosphogypsum of cement setting retarder, achieves comprehensive utilization of resources, waste residue is become useful resources, add economic benefit, decrease environmental pollution, protect natural, ecological.
A series of detailed description listed is above only illustrating for feasibility embodiment of the present invention; they are also not used to limit the scope of the invention, all do not depart from the skill of the present invention equivalent implementations done of spirit or change all should be included within protection scope of the present invention.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification sheets is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of specification sheets is only for clarity sake, those skilled in the art should by specification sheets integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (1)
1. one kind is used as the method for modifying of the phosphogypsum of cement setting retarder, it is characterized in that, with the phosphogypsum raw material of 1000 parts in mass fully mix with the lime powder of 60 parts in mass, after granulation, slaking 7-10 days, curing temperature is 40-50 DEG C, makes the modified ardealite that pH value is 6.0-8.0; Described phosphogypsum raw material is preparing phosphoric acid, produces the phosphogypsum produced in calcium hydrophosphate fodder process, and in described phosphogypsum raw material, the content of terra alba is more than or equal to 65% in massfraction; The water content of described modified ardealite is not more than 15% in massfraction; In described modified ardealite, the content of water-soluble Vanadium Pentoxide in FLAKES is less than or equal to 0.15% in massfraction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410110823.XA CN103833254B (en) | 2014-03-25 | 2014-03-25 | As the method for modifying of the phosphogypsum of cement setting retarder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410110823.XA CN103833254B (en) | 2014-03-25 | 2014-03-25 | As the method for modifying of the phosphogypsum of cement setting retarder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103833254A CN103833254A (en) | 2014-06-04 |
| CN103833254B true CN103833254B (en) | 2015-12-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410110823.XA Expired - Fee Related CN103833254B (en) | 2014-03-25 | 2014-03-25 | As the method for modifying of the phosphogypsum of cement setting retarder |
Country Status (1)
| Country | Link |
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| CN (1) | CN103833254B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106746837B (en) * | 2017-02-13 | 2021-05-28 | 中国建筑技术集团有限公司 | Cement retarder for gold-copper ore neutralized slag and preparation method thereof |
| CN110395929A (en) * | 2018-11-27 | 2019-11-01 | 湖北新洋丰肥业股份有限公司 | A kind of phosphogypsum modification cement retarder |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5639298A (en) * | 1995-11-27 | 1997-06-17 | Air Products And Chemicals, Inc. | Modified gypsum compositions |
| CN100497234C (en) * | 2007-09-25 | 2009-06-10 | 中国水利水电第十四工程局有限公司 | Method for preparing phosphogypsum retarded coagulation high efficiency water reducing agent |
| CN101397194A (en) * | 2007-09-29 | 2009-04-01 | 铜陵化学工业集团有限公司 | Method for manufacturing cement retarding ball |
| CN102531441A (en) * | 2012-02-28 | 2012-07-04 | 云南新龙矿物质饲料有限公司 | Production method and product of cement retarder from ardealite |
| CN103482896B (en) * | 2013-09-09 | 2015-07-15 | 四川大学 | Phosphogypsum ball and preparation method and application thereof |
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2014
- 2014-03-25 CN CN201410110823.XA patent/CN103833254B/en not_active Expired - Fee Related
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| CN103833254A (en) | 2014-06-04 |
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Granted publication date: 20151209 Termination date: 20210325 |