CN1401604A - Process for making quick hardening aluminosulfate cement - Google Patents
Process for making quick hardening aluminosulfate cement Download PDFInfo
- Publication number
- CN1401604A CN1401604A CN02130755A CN02130755A CN1401604A CN 1401604 A CN1401604 A CN 1401604A CN 02130755 A CN02130755 A CN 02130755A CN 02130755 A CN02130755 A CN 02130755A CN 1401604 A CN1401604 A CN 1401604A
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- China
- Prior art keywords
- quick hardening
- phosphogypsum
- hardening sulphoaluminate
- sulphoaluminate cement
- grog
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0445—Synthetic gypsum, e.g. phosphogypsum
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/08—Slag cements
-
- 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
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
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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
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A fast-hardening sulphoaluminiate cement is prepared through proportioning raw materials, grinding, calcining, and mixing for modifying, and is characterized by that its raw materials including the ardealite instead of natural gypsum, and flyash.
Description
Technical field
The invention belongs to the manufacture craft of special cement, particularly utilize the industrial waste phosphogypsum to make the manufacturing process of modification rapid hardening cement.
Background technology
Along with the modernization of modern project technology, also more and more higher to the technical requirements of special cement.When constructing rapid coagulation and hardened speed all there has been special requirement with each phase hardness, as the connection construction of cement pipeline, the construction that the basis of Large-Scale Equipment is on-the-spot etc. comprising special engineering.Though yet use with the continuous expansion of selling market but be restricted because of the cost of product is higher, more user is unable to reach.The problem of pendulum in face of this series products just is to improve its fast hard quick-hardening and how goes to reduce cost simultaneously, and this really is a pair of significant contradiction.Particularly the natural anhydrite during raw-meal ingredient is a major ingredient, it on the high side, but its technical feature is had main influence, and how to solve this contradiction, become the problem of special concern in the present special cement field.
Summary of the invention
The objective of the invention is to adopt industrial residue, phosphogypsum, flyash or boiling furnace slag to replace the expensive plaster of paris as far as possible, find out a production technique of producing quick hardening sulphoaluminate cement, thereby keeping and developing on the basis of fast hard, the low alkali of the fast dried sulplo-aluminate of modification, microdilatancy characteristic, reduce cost significantly, reach the utilization of three wastes and apply the purpose of quick hardening sulphoaluminate cement, for special type construction and XPRS project are rushed to repair the special cement new variety that a kind of high-quality low-cost is provided.
Key of the present invention is to select to substitute the substituting industrial waste of the plaster of paris.And find the technological operation standard that it is treated as qualified raw mix formula raw material.
Adopting this industrial waste of phosphogypsum to come as alternative expensive natural anhydrite or dihydrate gypsum by a large amount of evidences is a practicable technical scheme.Prepare raw material with the plaster of paris, carry out calcination behind the grinding, can generate the quick hardening sulphoaluminate cement of modification through being mixed again with the grog that forms after the calcination then, and the characteristic of low alkalinity, microdilatancy is arranged with the plaster of paris.When pilot production was produced the industrial waste phosphogypsum of phosphoric acid with Qinhuangdao phosphoric acid factory, the problem that at first runs into was that water content is bigger in this raw material, and became the colloid form to contain, so the drying of anhydrating is a great problem.A large amount of evidences, its rational water content should be between 8.5～9.5% as the raw-meal ingredient raw material time for phosphogypsum.And exsiccant phosphogypsum water content reaches more than 20%, all is impossible and remove moisture content with common mechanical method or other plain mode.Force oven dry that production cost will significantly be improved and lose the progressive meaning of technology.Taked to add the unslaked lime exsiccant chemistry method of drying among the present invention, effectively the water ratio with phosphogypsum is controlled between 8.5～9.5%, and the major ingredient CaO of unslaked lime is again composition necessary in the raw material, so chooses phosphogypsum after the drying treatment and substitutes the plaster of paris and Wingdale and alumina and be mixed into raw material and then become a key problem in technology among the present invention.
Because after having adopted the measure of strict control water content, calcination operation of being adopted and processing condition and traditional operation there is no any difference when the raw material after the evidence proportioning entered behind the grinding calcination.The sulphoaluminate cement clinker fundamental property that forms fired and the natural dihydrate gypsum grog of joining the calcination of raw material institute do not have any significant difference, this explanation unslaked lime method is used for the dry water content that reduces and reaches 8.5～9.5% phosphogypsum to substitute the plaster of paris be successful.
The raw material that provide the present invention below and prepared, adopt the physicals table of traditional resulting grog of calcination process:
| The water cement ratio example | The standard water yield | Presetting period | Final setting time | Denseness | Specific surface area | Degree of mobilization | Ultimate compression strength | Folding strength | ||||
| ????1d | ????3d | 28d | ????1d | ????3d | ????28d | |||||||
| ????0.43 | ????27.0 | 11 minutes | 16 minutes | ??29 | ??419 | ??127 | ??5.4 | ???5.6 | 7.7 | ??39.8 | ??65 | ??69.4 |
Mainly grasp and control it in the proportioning modified process and solidify and the hardened time, and the variation of each phase intensity.Adding natural anhydrite all has very big influence to the speed that thes cement solidifies and each the phase intensity that forms, and the adding of boiling furnace slag or flyash can be reconciled the pH value (belonging to acid) of finished cement, but its add-on increase all can influence decline to its each phase intensity.But in order further to reduce the production cost of aluminosulfate cement and don't to make its intensity index cross that low then to add an amount of acid flyash still not possible, and can control basically.Thereby added flyash and the plaster of paris in the later modified process that is mixed of grog and be mixed mutually and generate the quick hardening sulphoaluminate cement finished product so prepare in calcination.
Specific embodiments
In concrete production technique, dehydrating of phosphogypsum is the key of success of the present invention, it is big more that many more its of the add-on of unslaked lime generates heat, join the moisture of phosphogypsum reached below 9%, then can cause metering and the difficulty of carrying but water content is too low, be higher than 9% easy Tuo Cang when above and be difficult in the blanking bin blanking.Shi Yan practical index is between the water content 8.5～9.5% repeatedly.This moment, the add-on of unslaked lime was 17～20%, and at this moment the heat by unslaked lime and water reaction can make residual water evaporate in a large number, and surplus is controlled between 8.5～9.5%.The result of use of the unslaked lime that adds in order to guarantee, commodity unslaked lime will be through pulverizing and grinding, the little then effect of fineness fully, considering that it is met behind water can aquation, it is carefully also unnecessary that small-particle is easy to defeated and dispersed institute ether, so to cross 40～20 mesh sieves for well.Can add forced ventilation during grinding and be beneficial to further dispersing of moisture.
Phosphogypsum behind super-dry and grinding promptly can with Wingdale, the alumina formation raw material that are mixed, the weight percent that specifically is mixed can be with reference to following examples:
Incinerator internal heating ripe material will be sent into, its operation and technology bar behind the above raw grinding that is made into
Part and traditional green machined ripe material are identical, and the grinding before the calcination also stirs also identical with the traditional technology requirement.
| Embodiment | Raw material (%) | ||
| Dehydrated phosphogypsum | Wingdale | Alumina | |
| ????1 | ????17 | ????52 | ????31 |
| ????2 | ????18 | ????49 | ????33 |
| ????3 | ????19 | ????47 | ????34 |
| ????4 | ????20 | ????45 | ????35 |
In this procedure of modification that is mixed, be further to adjust the physical property of grog in order to add an amount of plaster of paris, presetting period particularly, setting time and each in period intensity adjustment, here, the add-on of the plaster of paris plays important effect, is to do stopping composition to adjust pH value and add that tart flyash or boiling furnace slag mainly act on, and the intensity of its each phase is all done harm rather than good.But in order under the standard-required that guarantees physical index and label intensity, to add flyash in right amount to reduce the production cost of rapid hardening cement.By experiment repeatedly, provide following prescription that is mixed and weight percent embodiment, the label that can guarantee rapid hardening cement respectively is the physical index of 425: 525 rapid hardening cements.
| Embodiment | Batching (%) | ||
| Grog | Dihydrate gypsum | Flyash | |
| ????5 | ????50 | ????15 | ????35 |
| ????6 | ????60 | ????12 | ????28 |
| ????7 | ????70 | ????10 | ????20 |
| ????8 | ????82 | ????7 | ????13 |
Use the embodiment of natural anhydrite:
| Embodiment | Batching (%) | ||
| Grog | Natural anhydrite | Flyash | |
| ????9 | ????85 | ????15 | ????10 |
| ????10 | ????68 | ????17 | ????15 |
| ????11 | ????56 | ????18 | ????26 |
| ????12 | ????50 | ????20 | ????30 |
The specific surface area of the cement after the evidence modification is short more big more then its time of coagulation, the corresponding raising of early strength, but the intensity to the later stage is unfavorable, should consider that when considering the fine grinding of cement powders it has certain restriction time of coagulation, take into account the intensity of each phase again, thus we to modification after the fineness requirement of quick hardening sulphoaluminate cement to be decided to be the specific surface area index be 350～400 square metres/kilogram.
Use the plaster of paris that the industrial waste phosphogypsum replaced part by the quick hardening sulphoaluminate cement of above processing method manufacturing and greatly reduced cost.The excellent properties that has kept the fast hard sulphur aluminium cement of traditional modification again, and color look, steady quality is reliable, for applying of rapid hardening cement provides good economic base.
Claims (7)
1, the manufacturing process of quick hardening sulphoaluminate cement comprises raw-meal ingredient and grinding, the grog calcination, and the modification three process that is mixed is characterized in that:
A. replace the plaster of paris with the industrial residue phosphogypsum after the drying treatment, become raw material with Wingdale, alumina proportioning again,
B. the technological operation of raw material calcination operation is identical with traditional technology,
C. in the modified process that is mixed, added flyash and grog, with the plaster of paris mutually compounding generate the quick hardening sulphoaluminate cement of modification.
2, according to the manufacturing process of the said quick hardening sulphoaluminate cement of claim 1, add 17-21% lime in the phosphogypsum when it is characterized in that the drying treatment of phosphogypsum by weight, make by lime and water reactive chemistry heating method that phosphogypsum is moisture to reach 8.5～9.5%.
3, according to the manufacturing process of the said quick hardening sulphoaluminate cement of claim 2, the lime that it is characterized in that adding in the phosphogypsum wants grinding to cross 20～40 order scalpings, and static grinding again more than 3 hours is strengthened mill inner ventilation after the mixing and stirring during grinding.
4,, it is characterized in that the weight percent that is mixed of phosphogypsum after the drying processed and Wingdale, alumina is according to the manufacture craft of claim 1 or 3 said quick hardening sulphoaluminate cements:
Dehydrated phosphogypsum 17～20%,
Wingdale 45～52%,
Alumina 31～34%.
5,, it is characterized in that raw material carry out grinding and stir before calcination according to the manufacturing process of the said quick hardening sulphoaluminate cement of claim 1.
6,, it is characterized in that grog with gained after the calcination adds and join natural ice gypsum, the flyash modified quick hardening sulphoaluminate cement that makes that concrete weight percent is as follows according to the manufacturing process of the said quick hardening sulphoaluminate cement of claim 1:
Grog 50～82%,
Dihydrate gypsum 7～15%,
Flyash 13～32%.
7,, it is characterized in that being with the weight percent that specifically is mixed that natural anhydrite and flyash makes quick hardening sulphoaluminate cement that is mixed of the grog after the calcination according to the manufacturing process of the said quick hardening sulphoaluminate cement of claim 1:
Grog 50～85%,
Natural anhydrite 15～20%,
Flyash 10～30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021307555A CN100351197C (en) | 2002-09-25 | 2002-09-25 | Process for making quick hardening aluminosulfate cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021307555A CN100351197C (en) | 2002-09-25 | 2002-09-25 | Process for making quick hardening aluminosulfate cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1401604A true CN1401604A (en) | 2003-03-12 |
| CN100351197C CN100351197C (en) | 2007-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021307555A Expired - Lifetime CN100351197C (en) | 2002-09-25 | 2002-09-25 | Process for making quick hardening aluminosulfate cement |
Country Status (1)
| Country | Link |
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| CN (1) | CN100351197C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103274620A (en) * | 2013-05-28 | 2013-09-04 | 河南理工大学 | Cement concrete strength improver |
| CN107827419A (en) * | 2017-11-24 | 2018-03-23 | 广州市公路勘察设计有限公司 | Early strong retarded concrete of low alkalinity and preparation method thereof |
| CN108863120A (en) * | 2018-07-18 | 2018-11-23 | 扬州大学 | A kind of high-strength sulphoaluminate cement base material and preparation method thereof |
| CN114573262A (en) * | 2022-03-24 | 2022-06-03 | 建筑材料工业技术情报研究所 | Steam curing-free agent for precast concrete member and preparation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085879A (en) * | 1992-10-16 | 1994-04-27 | 湖北襄樊水泥厂 | Producing cement from phosphor production is with strengthening gypsum sphere |
| CN1045761C (en) * | 1994-12-22 | 1999-10-20 | 中国建筑材料科学研究院 | Special purpose cement for low alkali glass fiber reinforced concrete and clinker production technology |
| CN1061951C (en) * | 1997-01-08 | 2001-02-14 | 中国建筑材料科学研究院水泥所阳泉联营特种水泥厂 | Super high strength quick hardening sulfaluminous cement |
| CN1187477A (en) * | 1997-12-19 | 1998-07-15 | 徐宝良 | Dehydrated phosphogypsum and producing method thereof |
| CN1101791C (en) * | 1998-12-30 | 2003-02-19 | 滦县筑方特种水泥有限公司 | Ultrastrength cement |
-
2002
- 2002-09-25 CN CNB021307555A patent/CN100351197C/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103274620A (en) * | 2013-05-28 | 2013-09-04 | 河南理工大学 | Cement concrete strength improver |
| CN107827419A (en) * | 2017-11-24 | 2018-03-23 | 广州市公路勘察设计有限公司 | Early strong retarded concrete of low alkalinity and preparation method thereof |
| CN108863120A (en) * | 2018-07-18 | 2018-11-23 | 扬州大学 | A kind of high-strength sulphoaluminate cement base material and preparation method thereof |
| CN114573262A (en) * | 2022-03-24 | 2022-06-03 | 建筑材料工业技术情报研究所 | Steam curing-free agent for precast concrete member and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100351197C (en) | 2007-11-28 |
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Granted publication date: 20071128 |
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