CN1065849A - Steel slag cement - Google Patents
Steel slag cement Download PDFInfo
- Publication number
- CN1065849A CN1065849A CN91106672A CN91106672A CN1065849A CN 1065849 A CN1065849 A CN 1065849A CN 91106672 A CN91106672 A CN 91106672A CN 91106672 A CN91106672 A CN 91106672A CN 1065849 A CN1065849 A CN 1065849A
- Authority
- CN
- China
- Prior art keywords
- cement
- gypsum
- steel slag
- slag
- semi
- 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
Links
- 239000004568 cement Substances 0.000 title claims abstract description 55
- 239000002893 slag Substances 0.000 title claims abstract description 51
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 28
- 239000010959 steel Substances 0.000 title claims abstract description 28
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 33
- 239000010440 gypsum Substances 0.000 claims abstract description 33
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 238000001354 calcination Methods 0.000 claims description 9
- 238000000227 grinding Methods 0.000 claims description 7
- 239000011505 plaster Substances 0.000 claims description 7
- 239000004575 stone Substances 0.000 claims description 7
- -1 Portland clinker Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 abstract description 8
- 239000011398 Portland cement Substances 0.000 abstract description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract description 2
- 230000003213 activating effect Effects 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 238000010304 firing Methods 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000013078 crystal Substances 0.000 description 10
- 238000005345 coagulation Methods 0.000 description 5
- 230000015271 coagulation Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052925 anhydrite Inorganic materials 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 150000004683 dihydrates Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229910001414 potassium ion Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
Classifications
-
- 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
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of steel slag cement, and relates to steel slag silicate type cement. The raw materials used by the cement are steel slag, portland cement clinker and gypsum, and the gypsum is semi-hydrated or soluble anhydrous gypsum obtained by firing treatment at the temperature of 150-450 ℃. The present invention features that the activating and setting promoting effect of semi-hydrated gypsum or soluble anhydrous gypsum on cement and the hydrated strength of semi-hydrated gypsum or soluble anhydrous gypsum are utilized fully. Therefore, the production process of the steel slag portland cement is particularly simple (the main equipment is a dryer, a furnace and a cement mill), low in cost, short in setting time and high in strength, and overcomes the defects of long setting time and low strength of the steel slag cement in the past.
Description
The invention belongs to the technical field of steel slag cement, is a kind of slag silicate-type cement.
The production of steel slag cement generally all is to be main raw material with slag, slag at present, adds cement clinker again and the plaster stone grinding forms.The steel slag cement that adopts this batching manufacturing is because gypsum is a plaster stone, and it is many to contain crystal water, makes cement setting time long, and influences cement intensity.Chinese patent publication number CN1030067A discloses one piece of " blast-furnace slag cement of quick setting behavior and high-early strength " patent application, the steel slag cement of introducing in this application also is to be raw material with slag, slag, cement clinker and gypsum, but gypsum adopts bassanite, bassanite is to be calcined in 700-800 ℃ of temperature range by plaster stone to form, gypsum all is 750 ℃ of bassanite in cited embodiment, yet gypsum is in the time of 450 ℃-700 ℃, become stiff gypsum, it condenses hardly, non-sclerous, and when 700-1000 ℃ of calcination, promptly form the slow setting gypsum, it is slower to condense.In order to shorten time of coagulation, need add the alkali that contains sodium and potassium ion or salt as activity excitant, can increase the complicacy of technology like this and increase production cost.
The objective of the invention is to provide the steel slag cement that a kind of production technique is simple, rate of set is fast, production cost is low, intensity is high.
The objective of the invention is to realize with following technical scheme.Its raw material of steel slag cement of the present invention adopts slag, slag, Portland clinker, semi-hydrated gypsum or solubility dehydrated gyp-.We know plaster stone (CaSO
42H
2O) be the gypsum that contains crystal water, being used for ordinary Portland cement is to make retardant, and the crystal water in the gypsum contains manyly more, its delayed coagulation is just good more.Plaster stone is if be used for the time of coagulation that steel slag cement not only prolonged it (12 hours do not reach final set) but also have influence on its intensity.With dihydrate gypsum (CaSO
42H
2Owing to lost crystal water, molecule reconfigures and forms the diverse allosome of various character, when temperature reaches 80-90 ℃, promptly begins to lose moisture content, and resolve into semi-hydrated gypsum (CaSO very soon in the time of 107-150 ℃ when O) heating
41/2 H
2O), when temperature rises to 200-400 ℃, then all lose crystal water and become dehydrated gyp-(CaSO
4) (that is soluble plasters), it very easily absorbs moisture and becomes semi-hydrated gypsum once again from air, when temperature reaches 450 ℃, then form insoluble gypsum, in the time of 450 ℃-700 ℃, become stiff gypsum, it condenses non-sclerous hardly, and when 700-1000 ℃ of calcination, promptly form the slow setting gypsum, condense slower.Therefore, in the technical scheme of the present invention, needed gypsum must be semi-hydrated gypsum or the solubility dehydrated gyp-(making full use of the effect that intensifies to cement of semi-hydrated gypsum or soluble plasters) that plaster stone (dihydrate gypsum) obtains after through 150 ℃ of-450 ℃ of temperature calcinations, carry out grinding after drying according to a certain percentage with these several raw materials, just can obtain required steel slag cement.
The raw materials used formula range of the present invention is: slag 30-40%, slag 30-50%, cement clinker 15-25%, semi-hydrated gypsum or solubility dehydrated gyp-4-8%(butt weight percent).
The production process of steel slag cement of the present invention is, the shrend slag must pass through magnetic separation (or with the screening of 5 * 5mm sieve), makes the content of metallic iron obtain strict control, the oven dry of screening back; The water-granulated slag oven dry; Gypsum or terra alba calcination oven dry, it is broken that cement clinker is wanted.Will be through the above-mentioned raw material of handling well ratio batching in accordance with regulations, fine-grinding, homogenizing, packing get final product.Want strict control what time following in process of production:
One, manufacture of cement Control essentials:
1, slag or slag must be dried, and the moisture content of measuring for the baking back is zero;
2, anhydrite or terra alba must be through 150-450 ℃ temperature calcination oven dry, and making its hygroscopic water is zero, makes the content of crystal water must be less than or equal to 1/4 of original crystal water, but greater than zero.
3, cement clinker must not drench in depositing the fortune process.
Two, fine-grinding
The main raw material of steel slag cement is slag and slag, and requires the thin of mill, and fineness is very big to the intensity and influence time of coagulation of steel slag cement, so this cement has adopted fine grinding technology, the fineness of cement should be controlled to be specific surface area 4000-5500cm
2/ g, or 4900 hole sizer surpluses are 2-4%.
Three, do the homogenizing of material and cement well
Each material answers strictness to weigh after the metering, according to proportioning, and goes into mill after mixing, and the cement that grinds should store back dress bag through cement silo, forbids mill is packed.In order to improve mill efficiency, behind the gypsum difference grinding of slag, slag and grog that difficulty can be ground and easy mill, be mixed in proportion, more to note doing well the homogenizing of cement this moment.
Embodiment one
1, the chemical ingredients of raw material and proportioning
| Material name | The place of production | Proportioning % | Chemical Composition % | Remarks | ||||||
| ZoSS | SiO 2 | Al 2O 3 | CaO | Fe 2O 3FeO | MgO | Other | ||||
| Grog | At the bottom of the class | 20 | 0.38 | 19.43 | 5.58 | 65.20 | 4.54 | 1.66 | ||
| Gypsum | The Shaodong | 7 | ／ | 12.28 | 2.79 | 33.02 | 1.91 | 2.65 | 400 ℃ of calcinations | |
| Slag | The Hunan steel | 35 | ／ | 17.48 | 5.45 | 24.72 | 36.03 | 10.10 | ||
| Slag | The Hunan steel | 38 | ／ | 37.11 | 11.09 | 43.36 | 0.47 | 6.40 | ||
KH=0.92 C in the grog
3S=56.34%
SO in the anhydrite of Shaodong
3=40.82%, former crystal water is 5%, is 2.17% through calcination post crystallization water.
2, Physical Experiment result
SO in the steel slag cement of the present invention
3=3.84%, cement fineness 4900 hole sizers are surplus to be 3%, the presetting period be 1: 55 ', final setting time be 4: 35 '.The test denseness is 29 millimeters, and amount of water is 24.8%.
Each age strength test-results unit MPa (MPa)
Soundness of cement: it is intact that cement goes out to grind boiling
Cement mark is 425#
Embodiment two
1, the chemical ingredients of raw material and proportioning
The KH=0.965 C3S=64.24 of grog
SO3=42.77% in the terra alba of Xiangxiang, former crystal water 7.22% is 1.20% through the crystal water of 150-450 ℃ of calcination after two hours.
2, Physical Experiment result
SO3=3.70% in this steel slag cement, cement fineness 4900 hole sizers are surplus to be 4%, the presetting period be 1: 05 ', final setting time be 4: 40 '.Amount of water is 24.3%, and the test denseness is 28 millimeters.
Each age strength test-results unit MPa (MPa)
Soundness of cement: it is intact that cement goes out to grind boiling
Cement mark is 325#
Slag silicate-type cement of the present invention, its production technique is simple, required equipment is few, production process is free from environmental pollution, and waste steel slag is turned waste into wealth.The steel slag cement intensity of being produced is higher, construction is convenient in shortening time of coagulation.Production cost is with 2/3 of label normal silicate, saves power consumption and coal consumption simultaneously, is to face the available marketable product innovation of the cement production enterprise that occupies a narrow space of bankruptcy at the competition intermediate frequency.
Claims (4)
1, a kind of steel slag cement, its raw material comprises slag, slag, Portland clinker, gypsum, it is characterized in that gypsum adopts semi-hydrated gypsum or solubility dehydrated gyp-.
2, steel slag cement according to claim 1, the formula range that it is characterized in that raw material are slag 30-40%, slag 30-50%, cement clinker 15-25%, semi-hydrated gypsum or solubility dehydrated gyp-4-8%(butt weight percent).
3, steel slag cement according to claim 1 and 2 is characterized in that semi-hydrated gypsum or solubility dehydrated gyp-are to be obtained through after 150-450 ℃ the temperature calcination by plaster stone.
4, steel slag cement according to claim 3 is characterized in that raw material through fine-grinding, and cement specific surface area is 4000-5500g/cm
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91106672A CN1065849A (en) | 1991-04-17 | 1991-04-17 | Steel slag cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91106672A CN1065849A (en) | 1991-04-17 | 1991-04-17 | Steel slag cement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1065849A true CN1065849A (en) | 1992-11-04 |
Family
ID=4908058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91106672A Pending CN1065849A (en) | 1991-04-17 | 1991-04-17 | Steel slag cement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1065849A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1068858C (en) * | 1995-11-09 | 2001-07-25 | 张嘉程 | High-strength steel slag and slag cement |
| CN1300034C (en) * | 2005-05-31 | 2007-02-14 | 武汉理工大学 | High-activity shrinkage-compensating mineral admixture and preparation method thereof |
| CN100357208C (en) * | 2002-06-08 | 2007-12-26 | 叶德敏 | Steel slag modification and steel slag cement |
| CN100429169C (en) * | 2003-09-19 | 2008-10-29 | 中国建筑材料科学研究院 | Novel high sulfur-resistant cement |
| CN102079635A (en) * | 2010-11-29 | 2011-06-01 | 浙江大学宁波理工学院 | Desulfurization gypsum clinker-free steel slag cement |
| CN102249572A (en) * | 2011-06-15 | 2011-11-23 | 徐雄文 | Process method for producing building gelling agent from industrial residues |
| CN102531426A (en) * | 2011-12-31 | 2012-07-04 | 钢铁研究总院 | Method for using gas quenching steel slag and desulfurized gypsum to produce steel slag cement |
| CN102584039A (en) * | 2012-02-24 | 2012-07-18 | 戴开旭 | Super-strength cement |
| CN107935419A (en) * | 2017-12-12 | 2018-04-20 | 常州明华运输有限公司 | A kind of modified steel scoria cement |
| CN112456948A (en) * | 2020-12-15 | 2021-03-09 | 湖北环沙再生资源有限公司 | Steel slag-doped powder material |
-
1991
- 1991-04-17 CN CN91106672A patent/CN1065849A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1068858C (en) * | 1995-11-09 | 2001-07-25 | 张嘉程 | High-strength steel slag and slag cement |
| CN100357208C (en) * | 2002-06-08 | 2007-12-26 | 叶德敏 | Steel slag modification and steel slag cement |
| CN100429169C (en) * | 2003-09-19 | 2008-10-29 | 中国建筑材料科学研究院 | Novel high sulfur-resistant cement |
| CN1300034C (en) * | 2005-05-31 | 2007-02-14 | 武汉理工大学 | High-activity shrinkage-compensating mineral admixture and preparation method thereof |
| CN102079635B (en) * | 2010-11-29 | 2013-01-16 | 浙江大学宁波理工学院 | Desulfurization gypsum clinker-free steel slag cement |
| CN102079635A (en) * | 2010-11-29 | 2011-06-01 | 浙江大学宁波理工学院 | Desulfurization gypsum clinker-free steel slag cement |
| CN102249572A (en) * | 2011-06-15 | 2011-11-23 | 徐雄文 | Process method for producing building gelling agent from industrial residues |
| CN102249572B (en) * | 2011-06-15 | 2012-08-22 | 徐雄文 | Process method for producing building gelling agent from industrial residues |
| CN102531426A (en) * | 2011-12-31 | 2012-07-04 | 钢铁研究总院 | Method for using gas quenching steel slag and desulfurized gypsum to produce steel slag cement |
| CN102584039A (en) * | 2012-02-24 | 2012-07-18 | 戴开旭 | Super-strength cement |
| CN107935419A (en) * | 2017-12-12 | 2018-04-20 | 常州明华运输有限公司 | A kind of modified steel scoria cement |
| CN107935419B (en) * | 2017-12-12 | 2020-08-14 | 湖州市菱湖三狮水泥有限公司 | Modified steel slag cement |
| CN112456948A (en) * | 2020-12-15 | 2021-03-09 | 湖北环沙再生资源有限公司 | Steel slag-doped powder material |
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| PB01 | Publication | ||
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |