CN101857389A - Method for preparing sulphoaluminate cement clinker with fluorgypsum, phosphogypsum and copper tailings - Google Patents

Method for preparing sulphoaluminate cement clinker with fluorgypsum, phosphogypsum and copper tailings Download PDF

Info

Publication number
CN101857389A
CN101857389A CN201010205647A CN201010205647A CN101857389A CN 101857389 A CN101857389 A CN 101857389A CN 201010205647 A CN201010205647 A CN 201010205647A CN 201010205647 A CN201010205647 A CN 201010205647A CN 101857389 A CN101857389 A CN 101857389A
Authority
CN
China
Prior art keywords
fluorgypsum
phosphogypsum
mine tailing
cement clinker
sulphoaluminate cement
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
CN201010205647A
Other languages
Chinese (zh)
Inventor
马保国
吴贝
李相国
蹇守卫
郑兵
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.)
Wuhan University of Technology WUT
Original Assignee
Wuhan University of Technology WUT
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 Wuhan University of Technology WUT filed Critical Wuhan University of Technology WUT
Priority to CN201010205647A priority Critical patent/CN101857389A/en
Publication of CN101857389A publication Critical patent/CN101857389A/en
Pending 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
    • C04B7/32—Aluminous cements
    • C04B7/323—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
    • 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
    • C04B2103/0004—Compounds chosen for the nature of their cations
    • C04B2103/0015—Noble metal or copper compounds
    • C04B2103/0016—Cu
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00215—Mortar or concrete mixtures defined by their oxide composition
    • 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

Landscapes

  • 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

The invention belongs to the filed of building materials, and relates to a method for preparing sulphoaluminate cement clinker with fluorgypsum, phosphogypsum and copper tailings, which is characterized by comprising the following steps: uniformly mixing limestone, bauxite, fluorgypsum, phosphogypsum and copper tailings, grinding together and then obtaining the sulphoaluminate cement clinker by firing in a precalcining kiln system, wherein the sulphoaluminate cement clinker comprises the following raw materials by weight percent: 29-35% limestone, 45-55% of bauxite, 5-20% of fluorgypsum, 1-10% of phosphogypsum and 0.5-3% of copper tailings. The preparation method adopts industrial solid waste as a raw material, and has low cost, less environmental pollution, low burning temperature of the clinker, low energy consumption per unit of the clinker, and high strength of the obtained clinker.

Description

A kind of method of utilizing fluorgypsum, phosphogypsum, copper mine tailing to prepare sulphoaluminate cement clinker
Technical field
The invention belongs to building material field, specially refer to a kind of method of utilizing industrial solid castoff fluorgypsum, phosphogypsum, copper mine tailing to prepare sulphoaluminate cement clinker.
Background technology
Aluminosulfate cement is the cement of a kind of less energy-consumption, low environmental load, and its grog firing temperature is 1350 ± 50 ℃.Compare with ordinary portland cement clinker, the firing range of aluminosulfate cement is the same with it to be 100 ℃, but its firing temperature will hang down 100 ℃, so aluminosulfate cement more is of value to save energy.It is fewer and feweri that but present sulphoaluminate cement clinker is produced employed raw material gypsum, and constantly discharge to society as fluorgypsum, phosphogypsum and the copper mine tailing of industrial solid castoff, the self-detergent power that has surpassed the Nature, make environment be subjected to very big pollution, and the accumulation of these solid waste or bury and taken a large amount of soils.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method of utilizing fluorgypsum, phosphogypsum, copper mine tailing to prepare sulphoaluminate cement clinker.This preparation method adopts industrial solid castoff to do raw material, and cost is low, and the grog firing temperature is low, the clinker strength height of acquisition.
The technical solution adopted for the present invention to solve the technical problems is as follows:
A kind of method of utilizing fluorgypsum, phosphogypsum, copper mine tailing to prepare sulphoaluminate cement clinker, it is characterized in that: Wingdale, bauxitic clay, fluorgypsum, phosphogypsum, copper mine tailing are mixed, through burning till in the nsp kiln system behind the grinding, wherein the shared mass percent of each raw material is followed successively by: Wingdale 29～35%, bauxitic clay 45～55%, fluorgypsum 5～20%, phosphogypsum 1～10%, copper mine tailing 0.5～3%.
Press such scheme, the content of CaO is 50～56% (mass percents) in the described Wingdale, and the content of MgO is no more than 1% (mass percent).
Press such scheme, Al in the described bauxitic clay 2O 3＞80% (mass percent), CaO＜0.6% (mass percent), Fe 2O 3＜3.0% (mass percent).
Press such scheme, described fluorgypsum is to produce hydrofluoric byproduct with sulfuric acid and fluorite, and its main ingredient is a terra alba, and its chemical composition is by mass percentage: CaO:33～39%, SO 3: 40～51%, SiO 2: 0.62～4.1%, F:2.7～6.8%, other chemical ingredients: surplus, all chemical composition sums are 100%.
Press such scheme, described phosphogypsum is the solid slag that produces during with sulfuric acid treating phosphorite in phosphoric acid production, and its main ingredient is a terra alba, and its chemical composition is by mass percentage: CaO:31～36%, SO 3: 43～50%, SiO 2: 1.2～1.6%, F:1～1.4%, P 2O 5: 1.7～2%; Other chemical ingredients: surplus, all chemical composition sums are 100%.
Press such scheme, described copper mine tailing is the residual mine tailing that contains the micro Cu element of mining industry, and the content of Cu element is 300～435mg in every kilogram of copper mine tailing.
Press such scheme, the described firing temperature that burns till in the nsp kiln system is 1250～1350 ℃.
The present invention compared with prior art has following advantage:
One, utilize fluorgypsum, phosphogypsum and copper mine tailing industrial solid castoff to produce sulphoaluminate cement clinker, it not only can save the high-quality gypsum resource that reduces day by day, and has consumed social environment harmful industrial waste, for the green of industrial gaseous waste thing is provided by a kind of approach that provides.Cost is low, and environmental pollution is little.
Its two, the CaSO in fluorgypsum or the phosphogypsum 4, content is more than 75%, therefore can replace common gypsum, and the CaSO in fluorgypsum or the phosphogypsum 4Obtain by chemical reaction, fineness is little, and is active high, can reduce the energy consumption of burning till of grog to a certain extent.
They are three years old, fluorine element that contains in fluorgypsum, the phosphogypsum and phosphoric, and the copper that contains in the copper mine tailing can make the raw material fusing point reduce, liquid phase is occurred in advance, just can obtain enough liquid phases at a lower temperature, thereby accelerate the velocity of diffusion of reaction particle, improve the solid-phase reaction velocity of raw material, make grog just can form down at lesser temps (1250～1350 ℃), the grog firing temperature is low.
They are four years old, this method is applicable to various cement kilns, it can obviously change burnability of raw material not changing cement industry and increasing under the condition of equipment, reduces the firing temperature of grog and (compares with ordinary portland cement clinker, the maximum range of decrease is 200 ℃), thereby obtain grog at a lower temperature, reduce the unit consumption of energy (unit consumption of energy of grog is low) of grog, improve the output of grog, the grog 3d intensity that obtains can reach more than the 50MPa clinker strength height of acquisition.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
Embodiment 1-3:
A kind of method of utilizing fluorgypsum, phosphogypsum, copper mine tailing to prepare sulphoaluminate cement clinker, concrete steps are: with industrial solid castoff fluorgypsum, the common plaster of paris of ardealite instead, and add an amount of copper mine tailing, mix the back grinding with Wingdale, bauxitic clay again, (embodiment 1 to be fired into sulphoaluminate cement clinker at a lower temperature by the nsp kiln system under the new type nonaqueous cement system, 2 and 3 firing temperature is respectively about 1260 ℃, about 1280 ℃ and about 1320 ℃), wherein, the shared mass percent of each raw material sees Table 1.
Above-mentioned employed fluorgypsum is to produce hydrofluoric byproduct with sulfuric acid and fluorite, and its main ingredient is a terra alba, and its chemical composition is by mass percentage: CaO:33～39%, SO 3: 40～51%, SiO 2: 0.62～4.1%, F:2.7～6.8%, other chemical ingredients: surplus, all chemical composition sums are 100.Phosphogypsum is the solid slag that produces during with sulfuric acid treating phosphorite in phosphoric acid production, and its main ingredient is a terra alba, and its chemical composition is by mass percentage: CaO:31～36%, SO 3: 43～50%, SiO 2: 1.2～1.6%, F:1～1.4%, P 2O 5: 1.7～2%; Other chemical ingredients: surplus, all chemical composition sums are 100%.The copper mine tailing adopts mining industry to left behind the mine tailing that contains the Cu element, and the content of Cu element is 300～435mg in every kilogram of copper mine tailing.
Embodiment 1: the shared mass percent of each raw material sees Table 1.The sulphoaluminate cement clinker product for preparing: its chemical ingredients and mineral composition see Table 2, and its physical and mechanical property sees Table 3.
Embodiment 2: the shared mass percent of each raw material sees Table 1.The sulphoaluminate cement clinker product for preparing: its chemical ingredients and mineral composition see Table 4, and its physical and mechanical property sees Table 5.
Embodiment 3: the shared mass percent of each raw material sees Table 1.The sulphoaluminate cement clinker product for preparing: its chemical ingredients and mineral composition see Table 6, and its physical and mechanical property sees Table 7.
Table 1, the prescription of sulphoaluminate cement clinker (the shared mass percent % of each raw material)
Figure GDA0000022557280000031
Table 2, main chemical compositions of sulphoaluminate cement clinker product (surplus is other) and mineral composition
Figure GDA0000022557280000032
Table 3, the physical and mechanical property of sulphoaluminate cement clinker product
Figure GDA0000022557280000033
Table 4, main chemical compositions of sulphoaluminate cement clinker product (surplus is other) and mineral composition
Figure GDA0000022557280000034
Table 5, the physical and mechanical property of sulphoaluminate cement clinker product
Stability Fineness (%) Time of coagulation (min) Folding strength (MPa) Ultimate compression strength (MPa)
Initial set Final set ??1d ??3d ??28d ??1d ??3d ??28d
Qualified ??4.2 ??74 ??122 ??5.3 ??6.1 ??7.0 ??26.4 ??41.6 ??43.3
Table 6, main chemical compositions of sulphoaluminate cement clinker product (surplus is other) and mineral composition
Figure GDA0000022557280000041
Table 7, the physical and mechanical property of sulphoaluminate cement clinker product
Figure GDA0000022557280000042
The explanation of last table: this method grog firing temperature is low, and wherein embodiment 1,2 and 3 firing temperature are respectively 1260 ℃, 1280 ℃ and 1320 ℃.Compare (its grog firing temperature is 1350 ± 50 ℃) with common aluminosulfate cement, the grog firing temperature of this method all descends to some extent, so unit grog energy consumption is little; And the cement clinker C for preparing 4A 6S content height, the folding strength height, the ultimate compression strength height, and every physical and mechanical property meets industry standard.
Embodiment 4-6:
A kind of method of utilizing fluorgypsum, phosphogypsum, copper mine tailing to prepare sulphoaluminate cement clinker, concrete steps are: with industrial solid castoff fluorgypsum, the common plaster of paris of ardealite instead, and add an amount of copper mine tailing, mix the back grinding with Wingdale, bauxitic clay again, (embodiment 4 to be fired into sulphoaluminate cement clinker at a lower temperature by the nsp kiln system under the new type nonaqueous cement system, 5 and 6 firing temperature is respectively about 1250 ℃, 1300 ℃ and 1350 ℃), wherein, the shared mass percent of each raw material sees Table 8.
Table 8, the prescription of sulphoaluminate cement clinker (the shared mass percent % of each raw material)
Figure GDA0000022557280000043
The content of CaO is 50～56% (mass percents) in the described Wingdale, and the content of MgO is no more than 1% (mass percent).
Al in the described bauxitic clay 2O 3＞80% (mass percent), CaO＜0.6% (mass percent), Fe 2O 3＜3.0% (mass percent).
Described fluorgypsum is to produce hydrofluoric byproduct with sulfuric acid and fluorite, and its main ingredient is a terra alba, and its chemical composition is by mass percentage: CaO:33～39%, SO 3: 40～51%, SiO 2: 0.62～4.1%, F:2.7～6.8%, other chemical ingredients: surplus, all chemical composition sums are 100%.
Described phosphogypsum is the solid slag that produces during with sulfuric acid treating phosphorite in phosphoric acid production, and its main ingredient is a terra alba, and its chemical composition is by mass percentage: CaO:31～36%, SO 3: 43～50%, SiO 2: 1.2～1.6%, F:1～1.4%, P 2O 5: 1.7～2%; Other chemical ingredients: surplus, all chemical composition sums are 100%.
Described copper mine tailing is the residual mine tailing that contains the micro Cu element of mining industry, and the content of Cu element is 300～435mg in every kilogram of copper mine tailing.

Claims (7)

1. method of utilizing fluorgypsum, phosphogypsum, copper mine tailing to prepare sulphoaluminate cement clinker, it is characterized in that: Wingdale, bauxitic clay, fluorgypsum, phosphogypsum, copper mine tailing are mixed, through burning till in the nsp kiln system behind the grinding, wherein the shared mass percent of each raw material is followed successively by: Wingdale 29～35%, bauxitic clay 45～55%, fluorgypsum 5～20%, phosphogypsum 1～10%, copper mine tailing 0.5～3%.
2. the method for utilizing fluorgypsum, phosphogypsum, copper mine tailing to prepare sulphoaluminate cement clinker according to claim 1, it is characterized in that: the mass percent content of CaO is 50～56% in the described Wingdale, and the mass percent content of MgO is no more than 1%.
3. the method for utilizing fluorgypsum, phosphogypsum, copper mine tailing to prepare sulphoaluminate cement clinker according to claim 1 is characterized in that: Al in the described bauxitic clay 2O 3Mass percent content＞80%, mass percent content＜0.6% of CaO, Fe 2O 3Mass percent content＜3.0%.
4. the method for utilizing fluorgypsum, phosphogypsum, copper mine tailing to prepare sulphoaluminate cement clinker according to claim 1, it is characterized in that: described fluorgypsum is to produce hydrofluoric byproduct with sulfuric acid and fluorite, its main ingredient is a terra alba, its chemical composition is by mass percentage: CaO:33～39%, SO 3: 40～51%, SiO 2: 0.62～4.1%, F:2.7～6.8%, other chemical ingredients: surplus, all chemical composition sums are 100%.
5. the method for utilizing fluorgypsum, phosphogypsum, copper mine tailing to prepare sulphoaluminate cement clinker according to claim 1, it is characterized in that: described phosphogypsum is the solid slag that produces during with sulfuric acid treating phosphorite in phosphoric acid production, its main ingredient is a terra alba, its chemical composition is by mass percentage: CaO:31～36%, SO 3: 43～50%, SiO 2: 1.2～1.6%, F:1～1.4%, P 2O 5: 1.7～2%; Other chemical ingredients: surplus, all chemical composition sums are 100%.
6. the method for utilizing fluorgypsum, phosphogypsum, copper mine tailing to prepare sulphoaluminate cement clinker according to claim 1, it is characterized in that: described copper mine tailing is the residual mine tailing that contains the micro Cu element of mining industry, and the content of Cu element is 300～435mg in every kilogram of copper mine tailing.
7. the method for utilizing fluorgypsum, phosphogypsum, copper mine tailing to prepare sulphoaluminate cement clinker according to claim 1 is characterized in that: the described firing temperature that burns till in the nsp kiln system is 1250～1350 ℃.
CN201010205647A 2010-06-22 2010-06-22 Method for preparing sulphoaluminate cement clinker with fluorgypsum, phosphogypsum and copper tailings Pending CN101857389A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201010205647A CN101857389A (en) 2010-06-22 2010-06-22 Method for preparing sulphoaluminate cement clinker with fluorgypsum, phosphogypsum and copper tailings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201010205647A CN101857389A (en) 2010-06-22 2010-06-22 Method for preparing sulphoaluminate cement clinker with fluorgypsum, phosphogypsum and copper tailings

Publications (1)

Publication Number Publication Date
CN101857389A true CN101857389A (en) 2010-10-13

Family

ID=42943585

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201010205647A Pending CN101857389A (en) 2010-06-22 2010-06-22 Method for preparing sulphoaluminate cement clinker with fluorgypsum, phosphogypsum and copper tailings

Country Status (1)

Country Link
CN (1) CN101857389A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102659329A (en) * 2012-04-27 2012-09-12 西南科技大学 Preparation method for quick hardening early strength hydraulic cementing material
CN102765893A (en) * 2012-07-13 2012-11-07 中国钢研科技集团有限公司 Method for preparing sulphoaluminate special cement clinker from waste residue fluorine gypsum and red mud
CN106365478A (en) * 2016-09-23 2017-02-01 金正大生态工程集团股份有限公司 Method for simultaneously producing sulphate aluminum cement and sulfuric acid through segmented calcination of phosphorus gypsum
CN110482966A (en) * 2019-09-26 2019-11-22 北京矿冶科技集团有限公司 Compound cemented filling material and its preparation method and application

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1432544A (en) * 2003-02-20 2003-07-30 张振秋 Sulphoaluminate cement clinker producing process with industrial waste

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1432544A (en) * 2003-02-20 2003-07-30 张振秋 Sulphoaluminate cement clinker producing process with industrial waste

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
《浙江大学学报（工学版）》 20080331 施正伦等 尾矿作水泥矿化剂和铁质原料的试验研究 507-510 1-7 第42卷, 第3期 2 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102659329A (en) * 2012-04-27 2012-09-12 西南科技大学 Preparation method for quick hardening early strength hydraulic cementing material
CN102765893A (en) * 2012-07-13 2012-11-07 中国钢研科技集团有限公司 Method for preparing sulphoaluminate special cement clinker from waste residue fluorine gypsum and red mud
CN102765893B (en) * 2012-07-13 2014-07-23 中国钢研科技集团有限公司 Method for preparing sulphoaluminate special cement clinker from waste residue fluorine gypsum and red mud
CN106365478A (en) * 2016-09-23 2017-02-01 金正大生态工程集团股份有限公司 Method for simultaneously producing sulphate aluminum cement and sulfuric acid through segmented calcination of phosphorus gypsum
CN110482966A (en) * 2019-09-26 2019-11-22 北京矿冶科技集团有限公司 Compound cemented filling material and its preparation method and application
CN110482966B (en) * 2019-09-26 2021-10-22 北京矿冶科技集团有限公司 Composite cemented filling material and preparation method and application thereof

Similar Documents

Publication Publication Date Title
CN102584045B (en) Active belite-sulphate aluminum cement clinker and preparation method for active belite-sulphate aluminum cement clinker
CN101172798A (en) Building gypsum and mineral additive, and method of manufacturing the same
CN101844882B (en) Composite portland cement and preparation method thereof
CN101367629B (en) Manufacture of sulphur aluminate cements with electrolytic manganesium residue and method of manufacturing the same
CN101973747B (en) Method for preparing baking-free brick from yellow phosphorus slag and modified phosphogypsum
CN103964713B (en) Flyash and Bayer process red mud is utilized to prepare the method for belite aluminosulfate cement
CN101333083A (en) High performance expansible cement clinker expansion agent series prepared thereby
CN104496228A (en) Road silicate cement clinker and preparation method thereof
CN104496236B (en) A kind of gelatinization material gypsum base eco-cement and production method thereof
CN103979816A (en) Concrete expanding agent with triple expansion sources and preparation method of concrete expanding agent
CN105314902A (en) Method for calcining belite sulphoaluminate cement clinker by totally utilizing industrial waste residues
CN104788032A (en) Belite cement and preparation method thereof
CN107056100A (en) A kind of preparation method of clinker
CN106588059A (en) Prefabricated member for lime rotary kiln and preparation method of prefabricated member
CN103373826A (en) Method for preparing low-carbon cement clinker by utilizing iron tailings
CN103664014A (en) White sulphoaluminate cement and preparing method thereof
CN104150794A (en) Preparation method for Portland cement with iron tailings
CN103922618A (en) Micro-expansion moderate heat portland cement and preparation method thereof
CN101857389A (en) Method for preparing sulphoaluminate cement clinker with fluorgypsum, phosphogypsum and copper tailings
CN105000814A (en) Processing method for preparing fast-hardening early-strength oil well cement with industrial waste slag
CN104944813A (en) Particulate Portland cement clinker and preparation method thereof
CN1315749C (en) High strength silicate clinker and its preparing method
CN102936104A (en) Method for preparing rapid hardening high-early-strength cement clinker
CN1850693A (en) Method for producing cement using high-carbon fly ash
CN1453234A (en) Ardealite curing modification process

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C12 Rejection of a patent application after its publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20101013