CN1279219A - Ardealite setting retarder for cement and its preparing process - Google Patents

Ardealite setting retarder for cement and its preparing process Download PDF

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Publication number
CN1279219A
CN1279219A CN99116529A CN99116529A CN1279219A CN 1279219 A CN1279219 A CN 1279219A CN 99116529 A CN99116529 A CN 99116529A CN 99116529 A CN99116529 A CN 99116529A CN 1279219 A CN1279219 A CN 1279219A
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CN
China
Prior art keywords
cement
setting retarder
phosphogypsum
ardealite
product
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.)
Pending
Application number
CN99116529A
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Chinese (zh)
Inventor
潘国耀
周明凯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KERUISI NEW MATERIAL SCIENCE AND TECHNOLOGY CO LTD WUHAN CITY
Original Assignee
KERUISI NEW MATERIAL SCIENCE AND TECHNOLOGY CO LTD WUHAN CITY
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KERUISI NEW MATERIAL SCIENCE AND TECHNOLOGY CO LTD WUHAN CITY filed Critical KERUISI NEW MATERIAL SCIENCE AND TECHNOLOGY CO LTD WUHAN CITY
Priority to CN99116529A priority Critical patent/CN1279219A/en
Publication of CN1279219A publication Critical patent/CN1279219A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/20—Retarders
    • 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)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

An ardealite setting retarder for cement is prepared from ardealite (30-70%), activated powdered coal ash (26-60%), calcium material (4-10%), and activating agent (0.1-0.5%). It can replace natural plaster to stably and normally regulate the setting of cement, increase the early strength and output of cement and decrease production cost.

Description

Ardealite setting retarder for cement and preparation method thereof
The present invention is a kind of ardealite setting retarder for cement and preparation method thereof.
Phosphogypsum is the industrial residue that phosphoric acid factory, phosphate fertilizer plant or some synthesis of detergent factory discharge, and its major ingredient is dihydrate gypsum (CaSO 42H 2O), also has some solubilities and insolubility impurity in addition.The annual emissions of China's phosphogypsum is about 1,000 ten thousand tons.Utilization ratio less than 25%, the air storage of a large amount of phosphogypsums not only takies a large amount of soils, and contaminate environment.Therefore it is great to develop the phosphogypsum resource significance.
China produces 500,000,000 tons of cement now, and will make cement setting retarder every year with about 2,000 ten thousand tons of plasters of paris, if can develop at a low price, the high-quality phosphogypsum retardation setting agent products substitution plaster of paris has huge economic benefit and social benefit.Japan is a resource-starved country, and the phosphogypsum 75% of Japan is used as cement setting retarder, and its retardant product processes is complicated, and the investment of founding the factory is big, and the phosphogypsum retardation setting agent cost of producing is higher.As this production method is moved on to China, its product will be difficult on the price with China market on plaster of paris competition.Some small-sized cement manufacturing enterprises of China do not deal with phosphogypsum the directly alternative plaster of paris in recent years and make cement setting retarder, for enterprise has brought certain economic benefit, but still there is following obstacle in so direct alternate practice: the phosphogypsum powder that (1) contains 20-30% water is difficult to oven dry with the existing dryer in cement mill, easily causes secondary pollution; (2) pulverous phosphogypsum can't adapt to existing cement mill storage vault and dosing unit; (3) acidic substance in the phosphogypsum and other impurity can make cement setting time undesired.
The present invention is directed to above-mentioned phosphogypsum exists oven dry difficulty, powder to use difficulty when making cement setting retarder, transfers shortcomings such as coagulating instability, by in phosphogypsum, adding flyash, calcareous material and micro-activator, make the raw material of working good through technologies such as stirring, moulding, maintenances, make a kind of novel ardealite setting retarder for cement based on dihydrate gypsum and activating fly ash.
It is as follows that novel ardealite setting retarder for cement is formed principle of design:
(1) calcareous material that design adds in the starting material is (as CaO, Ca (OH) 2, carbide slag etc.) can be in maintaining process with phosphogypsum in acidic substance (as H 3PO 4, P 2O 5Deng) react, generate corresponding soluble calcium phosphate etc.By said process, can eliminate the factor that is unfavorable for hydrated cementitious, the retardant product of making can be stablized accent to cement and coagulate.
(2) flyash that in starting material, designs and calcareous material, chemical reaction will take place in them in maintenance processes, generate hydrated calcium silicate, drated calcium aluminate; A small amount of dihydrate gypsum in the phosphogypsum also participates in reaction simultaneously, generate calcium sulphoaluminate, these reactions make product formation have the block or granular of certain intensity, block or granular retardant with certain intensity can also can be realized normal the storage and batching in the cement mill simultaneously with common drying plant oven dry.
(3) flyash, calcareous material is under the promotion of a small amount of activator, makes aluminosilicate glass body in the flyash generate the hydrated calcium silicate of some amount, drated calcium aluminate when maintenance; The aluminosilicate glass body that has certain hydrate on the surface has higher sial solubility rate, and the surface is also become concavo-convex irregular, such flyash and had very high pozzolanic activity by smooth, and the present invention is referred to as active fly ash.The novel phosphogypsum retardation setting agent that contains the active fly ash component is when hydrated cementitious, and the hydrate in the active fly ash serves as " crystal seed ", and the product of cement minerals aquation will preferentially folding be brilliant thereon, and this process will speed up the aquation of cement minerals; Concave-convex surface aluminosilicate glass body has the vitreum of unsalted surface (when cement grinding with some in the flyash in addition, hydrate on the vitreum will come off under the grinding element effect, stay some unsalted surfaces), have very high pozzolanic activity, they can just begin Ca (OH) with the sucking-off of clinker mineral aquation in early days at hydrated cementitious 2Secondary reaction takes place, and generates hydrated product.The above effect of active fly ash makes the cement that mixes this product have higher early strength and stable later strength.
In sum, advantage of the present invention and effect can be summarized as follows:
(1) ardealite setting retarder for cement product processes of the present invention is simple, the production line less investment, and can be all with industrial residue make starting material, the products production cost is low.
(2) ardealite setting retarder for cement of the present invention has been got rid of the factor of disturbing accent to coagulate in the phosphogypsum, can carry out stable the accent with fixed attention to cement.
(3) product is bulk or particulate state, intrinsic strength 3-5MPa, water ratio 5-8%, and cement producing line can store this product and can realize stable batching with the circle storehouse.
(4) the activating fly ash component in the product itself has higher pozzolanic activity, and can promote hydrated cementitious, so this product can improve the early strength of cement, raising cement output, reduction cement cost.
Application example: 1, raw material: phosphogypsum--the byproduct SO of Tongling chemical industry group 3Content 43% flyash--power station, Tongling wets ash discharge lime, and make 2 by oneself, fill a prescription: composition of raw materials (butt weight percent) by--near limestone kiln factory effective CaO 80% activator Tongling-- 3, technological process:
Stirring-compression moulding-natural curing (30 days)-dry product Chemical Composition: (weight percent)
The composition numbering ????SO 3 ????CaO ????SiO 2 ????Al 2O 3 ????Fe 2O 3 ????MgO ????IL
?L-1 ????25．83 ????24．3 ????21．35 ????7．88 ????1．90 ????0．85 ????16．49
?L-2 ????17．65 ????20．41 ????32．41 ????11．67 ????2．34 ????1．02 ????11．85
The silicate cement physicals of this product preparation
Numbering Grog volume % Plaster of paris volume % Product % of the present invention Time of coagulation (h:min) Standard consistency % Folding strength MPa Ultimate compression strength MPa
Initial set Final set 3 days 28 days 3 days 28 days
????A ????96 ????4 ?2∶30 ?4∶25 ?24．6 ?6．1 ?8．9 ?36．8 ?67．5
?A1 ?93．5 ?6．5(L-1) 2∶20 ?4∶05 ?24．8 ?6．2 ?9．1 ?39．6 ?69．5
?A2 ????92 ????8(L-2) 2∶10 ?4∶00 ?25．1 ?6．2 ?9．0 ?39．0 ?68．5
Annotate: plaster of paris SO 3Content is 40.5%

Claims (4)

1. ardealite setting retarder for cement and preparation method thereof.It is characterized in that this cement setting retarder be by phosphogypsum, flyash, calcareous material, activator be raw material through technologies such as batching, stirring, moulding, maintenance make contain activating fly ash and dihydrate gypsum is the product of major ingredient.Product mineral composition scope is (by weight percentage): activating fly ash 30-70% dihydrate gypsum 25-65% insoluble impurities 5%
2. ardealite setting retarder for cement according to claim 1.The raw material ratio scope that it is characterized in that this cement setting retarder is (with weight percent): phosphogypsum 30-70% flyash 26-60% calcareous material 4-10% activator 0.1-0.5%
3. the calcareous material in the ardealite setting retarder for cement starting material according to claim 2.It is characterized in that this calcareous material can be lime, white lime, contain the industry byproduct (as carbide slag) of Ca (OH) 2 etc.
4. ardealite setting retarder for cement preparation method according to claim 1.It is characterized in that this preparation method can be undertaken by following technology: promptly phosphogypsum, flyash, calcareous material and activator by the batching of proportional range described in the claim 2, batching after stirrer stir, by being pressed into or the rotating disk balling-up, after the moulding work in-process again through natural curing or atmospheric steam curing, drying or after drying product.
CN99116529A 1999-06-24 1999-06-24 Ardealite setting retarder for cement and its preparing process Pending CN1279219A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN99116529A CN1279219A (en) 1999-06-24 1999-06-24 Ardealite setting retarder for cement and its preparing process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN99116529A CN1279219A (en) 1999-06-24 1999-06-24 Ardealite setting retarder for cement and its preparing process

Publications (1)

Publication Number Publication Date
CN1279219A true CN1279219A (en) 2001-01-10

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Family Applications (1)

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CN99116529A Pending CN1279219A (en) 1999-06-24 1999-06-24 Ardealite setting retarder for cement and its preparing process

Country Status (1)

Country Link
CN (1) CN1279219A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101337685B (en) * 2008-08-11 2010-06-02 昆明理工大学 Process for producing calcium carbonate by absorbing carbon dioxide with ardealite decompose slag
CN104016602A (en) * 2014-06-27 2014-09-03 淮安市楚城水泥有限公司 Preparation method using industrial waste residue titanium gypsum as cement component
CN104176963A (en) * 2014-08-06 2014-12-03 宣城市水东泰狮缓凝剂制品有限公司 Phosphorus gypsum cement retarder
CN105347720A (en) * 2015-12-03 2016-02-24 高大元 Preparation method for cement retarder by using desulfurized gypsum
CN107324678A (en) * 2017-06-21 2017-11-07 湖北宜化集团有限责任公司 A kind of phosphogypsum modification treatment formulations and the application on cement retarder is prepared
CN107434364A (en) * 2017-08-29 2017-12-05 洛阳理工学院 A kind of ardealite/coal ash compound type cement retarder
CN110407497A (en) * 2019-08-23 2019-11-05 苏州市兴邦化学建材有限公司 A kind of strength cement-based grouting material inorganic retarder and preparation method thereof
CN111847956A (en) * 2020-07-14 2020-10-30 武汉理工大学 Phosphogypsum-based cement retarder and preparation method and application thereof
CN112408896A (en) * 2020-11-21 2021-02-26 湖北云海混凝土有限公司 Super-retarding concrete and preparation method thereof
CN113185178A (en) * 2021-05-14 2021-07-30 荆楚理工学院 Phosphogypsum cement retarder and preparation method thereof

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101337685B (en) * 2008-08-11 2010-06-02 昆明理工大学 Process for producing calcium carbonate by absorbing carbon dioxide with ardealite decompose slag
CN104016602A (en) * 2014-06-27 2014-09-03 淮安市楚城水泥有限公司 Preparation method using industrial waste residue titanium gypsum as cement component
CN104016602B (en) * 2014-06-27 2016-04-06 淮安市楚城水泥有限公司 Industrial residue titanium gypsum is used as the preparation method of cement ingredient
CN104176963A (en) * 2014-08-06 2014-12-03 宣城市水东泰狮缓凝剂制品有限公司 Phosphorus gypsum cement retarder
CN104176963B (en) * 2014-08-06 2015-12-09 宣城市水东泰狮缓凝剂制品有限公司 A kind of ardealite setting retarder for cement
CN105347720A (en) * 2015-12-03 2016-02-24 高大元 Preparation method for cement retarder by using desulfurized gypsum
CN107324678A (en) * 2017-06-21 2017-11-07 湖北宜化集团有限责任公司 A kind of phosphogypsum modification treatment formulations and the application on cement retarder is prepared
CN107434364A (en) * 2017-08-29 2017-12-05 洛阳理工学院 A kind of ardealite/coal ash compound type cement retarder
CN110407497A (en) * 2019-08-23 2019-11-05 苏州市兴邦化学建材有限公司 A kind of strength cement-based grouting material inorganic retarder and preparation method thereof
CN111847956A (en) * 2020-07-14 2020-10-30 武汉理工大学 Phosphogypsum-based cement retarder and preparation method and application thereof
CN112408896A (en) * 2020-11-21 2021-02-26 湖北云海混凝土有限公司 Super-retarding concrete and preparation method thereof
CN112408896B (en) * 2020-11-21 2022-05-13 湖北云海混凝土有限公司 Super-retarding concrete and preparation method thereof
CN113185178A (en) * 2021-05-14 2021-07-30 荆楚理工学院 Phosphogypsum cement retarder and preparation method thereof

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