CN100457662C - Method for producing compound cement blended directly with separated flyash and the made compound cement thereby - Google Patents

Method for producing compound cement blended directly with separated flyash and the made compound cement thereby Download PDF

Info

Publication number
CN100457662C
CN100457662C CNB021384428A CN02138442A CN100457662C CN 100457662 C CN100457662 C CN 100457662C CN B021384428 A CNB021384428 A CN B021384428A CN 02138442 A CN02138442 A CN 02138442A CN 100457662 C CN100457662 C CN 100457662C
Authority
CN
China
Prior art keywords
cement
flyash
consumption
sorting
blended material
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.)
Expired - Fee Related
Application number
CNB021384428A
Other languages
Chinese (zh)
Other versions
CN1450013A (en
Inventor
吴发辉
方凤娇
吴艳
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CNB021384428A priority Critical patent/CN100457662C/en
Publication of CN1450013A publication Critical patent/CN1450013A/en
Application granted granted Critical
Publication of CN100457662C publication Critical patent/CN100457662C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • 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
    • 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
    • C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust cements
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The production method of composite cement by directly adding separated flyash includes the following steps: placing the clinker and other mixing materials except for separated flyash into grinding machine together, grinding to obtain fine material, then placing the above-mentioned obtained fine powder and the described separated flyash into the powder-dressing machine to make separation, and the separated cement fine powder can be used as finished product and put into storage, and the coarse powder can be reground, the above-mentioned process can be repeated so as to obtain composite cement whose composition includes 15-50% of separated flyash, 15-30% of other mixing material and 30-60% of cement clinker.

Description

The production method of the complex cement of direct admixture sorting flyash and the complex cement that makes
Technical field:
The present invention relates to material of construction, the production method of a kind of flyash compound cement of more specifically saying so reaches the complex cement that makes with this method.
Background technology:
Flyash compound cement can effectively reduce cement cost, again the pending trade waste of a large amount of urgency turned waste into wealth, and benefits the nation and the people, thereby suitable application foundation is arranged.
In traditional production method, flyash compound cement is all overground jointly with flyash and other blended material and cement clinker without exception.The problem of being brought not only is greatly to have influenced mill output, consumes machinery and electric energy, simultaneously, because thin grey protoplasm activity is damaged, has influenced its strength level significantly.Based on existing production method, the regulation of China GB-1344-77, in flyash compound cement, the incorporation of flyash is quite limited.And the increase of incorporation, strength of cement also descend thereupon.If the incorporation of flyash surpasses 40%, then consumptive use of water normal consistence increases, and prolong time of coagulation, and especially early strength reduction amplitude is very big, and cement performance will take place to change more significantly, and influence is normally used.In the actual production, produce 425# cement, the incorporation of flyash is difficult to break through 20%.
Summary of the invention:
Technical problem to be solved by this invention is to avoid above-mentioned existing in prior technology weak point, and a kind of production method of complex cement of direct admixture sorting flyash and the complex cement that makes are provided.Not only can reduce energy consumption, improve cement output, and can improve intensity, improve performance, thereby can strengthen the consumption of sorting flyash in complex cement, further reduce the complex cement cost by keeping the activity of sorting flyash.
The technical scheme that technical solution problem of the present invention is adopted is:
The characteristics of the production method of complex cement of the present invention are to possess following technological process:
(1), cement clinker and other blended material except that sorting flyash drop into grinding machine jointly, through grind fines;
(2), the sorting flyash that includes I level ash, II level ash, III level ash and the above cinder of III level as one of blended material carries out sorting without the powder separating machine that grinds directly and above-mentioned steps (1) gained fines drops into jointly by the setting of cement fineness standard;
(3), the thin ash of cement that sub-elects in the above-mentioned steps (2) is as the finished product warehouse-in, cinder returns mill;
(4), repeat said process.
With the complex cement that aforesaid method makes, the consumption that is characterized in described sorting flyash is that the consumption of 15-50%, other blended material is that 15-30%, cement clinker consumption are 30-60%.
Compared with the prior art, beneficial effect of the present invention is embodied in:
The present invention not only can reduce energy consumption effectively, improve cement output greatly, and can improve intensity by keeping the activity of sorting flyash, improves performance, thereby can strengthen the consumption of sorting flyash in complex cement, further reduces the complex cement cost.
Theory and practice shows that all sorting flyash has better quality than general levigate ash, after it mixes cement, can further strengthen active effect, micro aggregate effect and the shape effect of flyash.Therefore, mix sorting flyash and have the better intensity performance than the cement of mixing levigate ash.This effect of sorting flyash is determined by following characteristics:
1, has very high dispersity.The specific surface area of sorting flyash is up to 5000-6000cm 2/ g accounts for more than 95% less than thin the material of 60 μ m, than the dispersity height of general levigate ash.Dispersity is high more, and energy and surface free energy are just big more in its chemistry, and the chemically reactive of itself is also high more.Its particle diameter is more little, and the velocity of diffusion in liquid phase is fast more, and the second adsorption speed of response between flyash and the hydrated cementitious product is accelerated.By this reaction, absorbed the Ca in the liquid phase (OH) 2, system basicity is reduced, promoted the aquation of cement clinker again.Therefore, the hydration rate of cement in the cement stone is accelerated, extent of hydration increases, and the hydrated calcium silicate crystallite of low alkalinity increases, and thick Ca (OH) 2Crystallization reduces.The former is the main source of cement strength just.So the high degree of dispersion of sorting flyash has been strengthened the active effect of flyash.
2, hollow glass micropearl content height.The adsorpting water quantity of microballon own is few, can play " ball " again.Sorting flyash can make the water requirement of cement slurry greatly reduce, and simultaneously, these unequigranular microballons are distributed in the slurry, can strengthen its water-retentivity and uniformity, thereby have improved the structural state of cement stone effectively, and porosity is descended, and degree of compactness improves.That is to say, further bring into play and strengthened the shape effect of flyash.
3, strength of cement mortar height.Make cement mixture with sorting flyash, when incorporation was in 40%, 90 days intensity of the cement mortar of different volumes all was higher than the strength of cement mortar of mixing general levigate ash.When volume was 20%, age strength can be near the plain cement cement mortar strength with the length of time in 28 days.Its 90 days intensity with the length of time plain cement cement mortar strength also basic identical.Therefore, sorting flyash is than the more good cement mixture of general fine-ground fly-ash quality, and is directly as cement mixture, more superior on technology, performance with sorting flyash.
4, from the fineness index, the above ash of III level is accounting for 40%-80% below 45 microns, and particularly the seed activity height of 5-30 micron is the important source of cement stone, and wherein the ultimate compression strength of heavy wall cenosphere own is about 700Mpa.Based on this, III level ash fully can be without grinding machine, and it is compound directly to enter cement mill powder separating machine homogenizing.From the loss on ignition index, the loss on ignition of national most fly ash in electric power plant is very little, generally all less than 5%, even if loss on ignition big also substantially below 10%, all other indexs substantially all satisfy the index request of IIIII level.
Riverine certain sorting cinder quality test result of petrochemical system heat power plant, remove fineness and reach 78% through 0.045mm square hole sieve screen over-size, do not meet the III grade standard, other indexs such as water requirement 111%, loss on ignition 4.92%, water content 0.22%, sulphur trioxide 0.14% all meet I ash standard.
According to the particular case of above-mentioned sorting flyash, answer emphasis to solve and be higher than 45 microns, reach the levigate problem of this part cinder of 78%.And GB is that 80 microns square hole sieves tail over below 10% for cement fineness requirement standard, and then the cinder that is higher than the cement fineness standard remained little, at most also only below 10%.And existing overground method is actual just for grinding 10% cinder, and it is overground but 90% the standard ash that meets cement fineness to be put together, obviously unreasonable.
Embodiment:
Sorting flyash in the present embodiment directly mixes not overground, and the production method specific embodiment is:
1, cement clinker and other blended material except that sorting flyash drop into grinding machine jointly, through grind fines.
2, as the sorting flyash of one of blended material without grinding directly and above-mentioned steps 1 gained fines drops into powder separating machine jointly and carries out sorting.The feeding mode of sorting flyash is that at grinding machine mill tail, helical feed reamer transfer limes middle part otch, the installation funnel is carried reamer with compact spiral again, through electronic scale metering input.
3, the thin ash of the cement that sub-elects in the above-mentioned steps 2 is as the finished product warehouse-in, and cinder returns mill;
4, repeat said process.
According to above method, the consumption of various mineral is by weight percentage:
Sorting flyash 15-50%, other blended material 15-30%, cement clinker 30-60%.
For volcano grey matter class blended material, the consumption of sorting flyash is that the consumption of 15-40%, other blended material is that 15-25%, cement clinker consumption are 40-60%.Wherein, calcareous addition of volcano comprises burned coal gangue, burns shale, chainotte, float stone, cinder etc.Because the calcareous addition of volcano and the sorting flyash homogeneity same sex too much cause strength degradation for fear of the homogeneous material volume, therefore, calcareous addition of volcano should be controlled incorporation according to needs of production.For pozzolanic materials, suitable slag, Sulfates material.Or adopt alkaline scrap material mineral and lime mud.This modification to pozzolanic material, excited promoter action, diminishing strengthens simultaneously, improves the performance that its part is unfavorable for cement, improves sorting ash add-on and cement quality.
For being mixed with the Sulfates waste residue, or alkaline scrap material, or the carbonate waste residue, and all kinds of flyash being had the blended material of the mineral that excite modifying function, the consumption of sorting flyash is that the consumption of 25-50%, other blended material is that 15-25%, cement clinker consumption are 30-50%.Wherein, the Sulfates waste residue comprises alunite, dihydrate gypsum, dehydrated gyp-, sulfate slag, aluminium sulfate slag, metal abandoned mine, non-ferrous metal salt mine CHARACTERISTICS OF TAILINGS SAND etc.Alkaline scrap material comprises lime kiln slag (residual 10-20% calcium oxide).The carbonate waste residue comprises phosphogypsum etc.
In concrete the enforcement, on above basis, can also add 0～15% waste acid water lime mud or pyrite slag as excitation material.On the one hand, to guarantee having mixing of a certain amount of blended material, to keep the reasonableness of cement minerals superior structural; On the other hand, guarantee to grind the sorting flyash that tail directly mixes and reach enough amounts, make cement cost drop to bottom line, and cement performance is further improved.
Waste acid water lime mud as exciting agent in the present embodiment is with the remnant behind the unslaked lime processing industrial and mining enterprises waste acid water, also claims the waste acid water lime mud.Industrial and mineral waste acid water flow is big, and for handling it, the unslaked lime consumption is also big, and lime mud is also many.At present, this waste residue is not done other utilization as yet except that filling out the road.After lime mud absorbs waste acid water, waste acid water not only cracking silicon, aluminium mineral in the lime mud, simultaneously also with the synthetic newborn calcium sulfate of the residual oxidation calcification of part.After entering the hydrated cementitious system, rapid reaction in alkaline environment, except discongesting other mineral in the aquation system, the activated silica of self, aluminium, calcium also participate in secondary hydration, generate gelling material, for cement stone early strength is made actively and contribution.
About pyrite slag, China produces sulfurous iron ore per year and is about 2,000 ten thousand tons, does not reach about 1,000 ten thousand tons of the abandoned mine of relieving haperacidity requirement grade.For many years, abandoned mine is stored up about 100,000,000 tons.The about 3-15% of pyrite slag content.Pyrite slag also has chalcopyrite, zink sulphide, square aluminium ore except that part sulphur, iron, often contain selenium, gold and silver, and major part is gangue SiO 2(CaCO 3), micro heavy etc., the mineral composition complexity.Behind pyrite slag the is levigate chance water, in the hydrated cementitious system, be subjected to alkaline excitation, silicon, calcium mineral activate gradually, the partial vulcanization thing is exciting other cement mineralses consumingly, and other micro-non-ferrous metal and heavy metal have also actively promoted the hydrated cementitious system, play the effect of diminishing, enhancing.
If aluminium matter mineral content height in the blended material suitable is mixed gypsum class material, need an amount of stone flour generating portion aluminium carbonate hydrochlorate salt mineral simultaneously, to regulate and to avoid, cause the excessive and detrimental expansion that forms of ettringite because of excessive the existing of gypsum.
If vitriol, phosphoric acid salt, non-ferrous metal salt waste residue material mix too much, should adopt the null readings of replenishing the calcium, for example lime mud.Have ready conditions and also can suitably mix a small amount of alunite, early strong to promote.
Table 1 is the strength of cement quality testing account under differing materials, different proportion scale.
The proportioning of concrete material is (parts by weight) in the table 1:
Example 1: 60 parts of cement clinkers, blended material are 20 parts of volcano grey matter class scoria lime-ash, 20 parts in sorting flyash.
Example 2: 55 parts of cement clinkers, blended material be 20 parts in volcano grey matter class zeolite, excite 5 parts of carbonate stone flours, 20 parts in the sorting flyash of material as modification.
Example 3,50 parts of cement clinkers, blended material are that volcano grey matter class comprises 10 parts of water discharge coal ash and 15 parts in slag class slag, excites 5 parts of carbonate stone flours, 20 parts in the sorting flyash of material as modification.
40 parts of example 4, cement clinkers, blended material are that volcano grey matter class is burnt 15 parts in shale, excited 10 parts of pyrite slags, 5 parts of the carbonate stone flours of material as modification, and 30 parts in sorting flyash.
The inventive method can produce all kinds of different labels, different varieties cement, for producing more apparent its unique high-performance of the cement of label more than No. 425, high quality, advantage cheaply.
Table 1 (in parts by weight)
Figure C0213844200081

Claims (5)

1, the production method of the complex cement of direct admixture sorting flyash is characterized in that possessing following technological process:
A, cement clinker and other blended material except that sorting flyash drop into grinding machine jointly, through grind fines;
B, carry out sorting without grinding directly by the powder separating machine of cement fineness standard setting with the common input of above-mentioned steps a gained fines as the sorting flyash that includes I level ash, II level ash, III level ash and the above cinder of III level of one of blended material;
The thin ash of the cement that sub-elects among c, the above-mentioned steps b is as the finished product warehouse-in, and cinder returns mill;
D, repetition said process.
2, a kind of complex cement that makes with the described method of claim 1, the consumption that it is characterized in that described sorting flyash are that the consumption of 15-50%, other blended material is that 15-30%, cement clinker consumption are 30-60%.
3, complex cement according to claim 2 is characterized in that for volcano grey matter class blended material, and the consumption of sorting flyash is that the consumption of 15-40%, other blended material is that 15-25%, cement clinker consumption are 40-60%.
4, complex cement according to claim 2, it is characterized in that for being mixed with the Sulfates waste residue, or alkaline scrap material, or carbonate waste residue, and all kinds of flyash being had the blended material of the mineral that excite modifying function, the consumption of sorting flyash is that the consumption of 25-50%, other blended material is that 15-25%, cement clinker consumption are 30-50%.
5,, it is characterized in that adding the waste acid water lime mud of 0-15% or pyrite slag as excitation material according to claim 2 or 3 or 4 described complex cements.
CNB021384428A 2002-10-14 2002-10-14 Method for producing compound cement blended directly with separated flyash and the made compound cement thereby Expired - Fee Related CN100457662C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB021384428A CN100457662C (en) 2002-10-14 2002-10-14 Method for producing compound cement blended directly with separated flyash and the made compound cement thereby

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB021384428A CN100457662C (en) 2002-10-14 2002-10-14 Method for producing compound cement blended directly with separated flyash and the made compound cement thereby

Publications (2)

Publication Number Publication Date
CN1450013A CN1450013A (en) 2003-10-22
CN100457662C true CN100457662C (en) 2009-02-04

Family

ID=28680811

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB021384428A Expired - Fee Related CN100457662C (en) 2002-10-14 2002-10-14 Method for producing compound cement blended directly with separated flyash and the made compound cement thereby

Country Status (1)

Country Link
CN (1) CN100457662C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2987834B1 (en) * 2012-03-08 2021-01-22 Lafarge Sa HYDRAULIC COMPOSITION WITH LOW CLINKER CONTENT
CN109553316A (en) * 2018-12-10 2019-04-02 福州大学 It is a kind of using carbide slag and flyash as the complex cement of mixing material

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1237549A (en) * 1999-06-25 1999-12-08 孟云芳 Composite cement

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1237549A (en) * 1999-06-25 1999-12-08 孟云芳 Composite cement

Also Published As

Publication number Publication date
CN1450013A (en) 2003-10-22

Similar Documents

Publication Publication Date Title
CN108117292B (en) A kind of copper tailing slag complex mineral blending material and preparation method thereof
CN110590198B (en) Tungsten tailing cementing material and preparation method thereof
CN106587695A (en) Method for preparing cement mixture from waste phosphorus dregs through wet-milling method
CN105130220B (en) With discarded concrete and the method for sludge eco-cement and active sand
CN108164164A (en) Complex cement and preparation method thereof
CN113185154B (en) Method for preparing cement clinker by using rare earth tailings
CN112723843A (en) Preparation method of weak-base-excited nickel slag high-strength concrete
CN109896770B (en) Concrete reinforcing agent
CN112537920B (en) Nano reinforcing agent for sodium sulfate and sodium carbonate alkali-activated cementing material and preparation method and application thereof
CN115650624B (en) Metal smelting waste residue derived material and preparation method and application thereof
CN112608042A (en) Method for preparing superfine copper tailing filling cementing material by wet grinding method of water-quenched copper slag
CN111187013A (en) Environment-friendly high-strength cement and preparation method thereof
CN114315184A (en) Ultra-fine admixture for solid waste based composite lithium slag and preparation method and application thereof
CN110407490A (en) A kind of preparation method of the compound high additive cement of inorganic solid waste
CN109626931A (en) Tailing cementing agent and preparation method thereof, application method and application
CN108947287A (en) Controlling low-intensity backfill cementing material containing red mud and preparation method thereof
CN113880486B (en) Composite admixture utilizing solid wastes of iron and steel plant and preparation method thereof
EP0792849B1 (en) Limestone filled Portland cements
CN112341111B (en) Red mud-based mine backfill material
JPH07267697A (en) Hydraulic composition
CN102643067A (en) Coal ash gangue filling activity-stimulating rubber solid material and preparation method thereof
CN100457662C (en) Method for producing compound cement blended directly with separated flyash and the made compound cement thereby
CN102745919A (en) Preparation method of tailing micropowder portland cement
CN110228956A (en) A kind of Portland clinker of high compressive strength and preparation method thereof
CN1012951B (en) Process for producing cement by hypercalcium powdered coal ash

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20090204

Termination date: 20141014

EXPY Termination of patent right or utility model