CN104478247A - Cooling way for belite-barium calcium sulfoaluminate cement clinker - Google Patents

Cooling way for belite-barium calcium sulfoaluminate cement clinker Download PDF

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Publication number
CN104478247A
CN104478247A CN201410652071.XA CN201410652071A CN104478247A CN 104478247 A CN104478247 A CN 104478247A CN 201410652071 A CN201410652071 A CN 201410652071A CN 104478247 A CN104478247 A CN 104478247A
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China
Prior art keywords
belite
temperature
cooling
cement clinker
sulphoaluminate cement
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Pending
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CN201410652071.XA
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Chinese (zh)
Inventor
宫晨琛
孙科科
王兆龙
王守德
芦令超
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University of Jinan
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University of Jinan
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Priority to CN201410652071.XA priority Critical patent/CN104478247A/en
Publication of CN104478247A publication Critical patent/CN104478247A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement, e.g. improving or optimising the production methods; Cement grinding

Abstract

The invention provides a cooling way for belite-barium calcium sulfoaluminate cement clinker. The cooling way comprises the following steps: taking a material fired at the temperature of 1350 DEG C out of a high-temperature furnace, and then performing air cooling rapidly to reduce the temperature to below 1000 DEG C within 20-120s; reducing the air speed to reduce the temperature of the material to below 550 DEG C within 5-20min; and increasing the air speed to reduce the temperature of the material to below 50 DEG C within 30-150s, thereby obtaining the belite-barium calcium sulfoaluminate cement clinker. The content of gamma-C2S in the belite-barium calcium sulfoaluminate cement clinker provided by the invention is relatively low, and the gelatinization activity is high; the cooling energy consumption is reduced and the cost is reduced; and the process is simple.

Description

A kind of type of cooling of Belite-calcium barium sulphoaluminate cement grog
Technical field
The invention belongs to cement technology field, relate to the type of cooling of belite and the barium-bearing calcium sulfo-aluminate complex ore phase cement clinker that is essential mineral.
Background technology
Belite-calcium barium sulphoaluminate cement grog is with C 2s-CBA-C 3s-C 3a-C 4aF is the ore deposit phase system of main composition, wherein C 2s containing 30 ~ 70%, CBA is containing 5 ~ 45%.This cement have firing temperature low, low-quality limestone resource, CO can be utilized 2quantity discharged is low, the feature such as resistance to fouling and excellent durability, is applicable to the large-scale construction engineering of the contour specification of quality in Highrise buildings, dykes and dams, high-grade highway, airport and tunnel.But, in the process of cooling of grog, there is C 2the conversion of S many kinds of crystal formations, wherein α '-C 2the intensity comparatively β-C of S 2s is high; α-C 2the strength test results of S is inconsistent, have higher than β-C 2s, have lower than β-C 2s, what have only has faint gelling even at normal temperatures; γ-C 2s almost without the hydraulicity, easy efflorescence.
Due to C 2the gelation activity of each crystal formation of S is totally different, causes the difference of Belite-calcium barium sulphoaluminate cement grog performance.Therefore, its gelling property can be improved by regulation and control Belite-calcium barium sulphoaluminate cement clinker cooling mechanism.At present, the high efficiency cooling machine that cement production enterprise adopts can by about clinker cooling to 70 DEG C in several minutes, although ensure that cooling quality, the effective rate of utilization of energy is low, and energy consumption is higher.
Summary of the invention
The invention provides a kind of type of cooling of Belite-calcium barium sulphoaluminate cement grog, according to C 2the crystal conversion rule of S, carries out by stages cooling to grog, avoids inertia γ-C 2s generates, and ensure that the performance of Belite-calcium barium sulphoaluminate cement grog.
The technical solution adopted in the present invention is:
A type of cooling for Belite-calcium barium sulphoaluminate cement grog, its step is as follows:
(1) air-cooled fast after the material burnt till at 1350 DEG C being taken out from High Temperature Furnaces Heating Apparatus, make its temperature in 20 ~ 120 seconds be down to less than 1000 DEG C;
(2) reduce wind speed, make material temperature in 5 ~ 20 minutes be down to less than 550 DEG C;
(3) improve wind speed, make material temperature in 30 ~ 150 seconds be down to less than 50 DEG C, obtain Belite-calcium barium sulphoaluminate cement grog.
Outstanding advantages of the present invention is:
(1) γ-C in Belite-calcium barium sulphoaluminate cement grog provided by the present invention 2s content is lower, and gelation activity is high;
(2) reduce cooling energy consumption, reduce costs;
(3) technique is simple.
Embodiment
Embodiment 1
(1) air-cooled fast after the material burnt till at 1350 DEG C being taken out from High Temperature Furnaces Heating Apparatus, make its temperature in 30 seconds be down to less than 1000 DEG C;
(2) reduce wind speed, make material temperature in 7 minutes be down to less than 550 DEG C;
(3) improve wind speed, make material temperature in 40 seconds be down to less than 50 DEG C, obtain Belite-calcium barium sulphoaluminate cement grog.
Adopt TOPAS software, use Rietveld whole powder pattern fitting to carry out quantitative analysis of mineral to Belite-calcium barium sulphoaluminate cement grog, the mass percentage obtaining each crystal formation mineral is respectively: α '-C 2s 6.5%, β-C 2s 88.2% and γ-C 2s 5.3%.Getting 420 grams, Belite-calcium barium sulphoaluminate cement grog and industrial gypsum 30 grams, to record 3 days ultimate compression strength according to GB/T17671-1999 " Test method for strength of hydraulic cement mortar " be 21.7MPa, and 28 days ultimate compression strength is 58.6MPa.
Embodiment 2
(1) air-cooled fast after the material burnt till at 1350 DEG C being taken out from High Temperature Furnaces Heating Apparatus, make its temperature in 50 seconds be down to less than 1000 DEG C;
(2) reduce wind speed, make material temperature in 13 minutes be down to less than 550 DEG C;
(3) improve wind speed, make material temperature in 80 seconds be down to less than 50 DEG C, obtain Belite-calcium barium sulphoaluminate cement grog.
Adopt TOPAS software, use Rietveld whole powder pattern fitting to carry out quantitative analysis of mineral to Belite-calcium barium sulphoaluminate cement grog, the mass percentage obtaining each crystal formation mineral is respectively: α-C 2s 5.9%, β-C 2s 86.4% and γ-C 2s 7.7%.Getting 420 grams, Belite-calcium barium sulphoaluminate cement grog and industrial gypsum 30 grams, to record 3 days ultimate compression strength according to GB/T17671-1999 " Test method for strength of hydraulic cement mortar " be 22.8MPa, and 28 days ultimate compression strength is 56.6MPa.
Embodiment 3
(1) air-cooled fast after the material burnt till at 1350 DEG C being taken out from High Temperature Furnaces Heating Apparatus, make its temperature in 90 seconds be down to less than 1000 DEG C;
(2) reduce wind speed, make material temperature in 18 minutes be down to less than 550 DEG C;
(3) improve wind speed, make material temperature in 120 seconds be down to less than 50 DEG C, obtain Belite-calcium barium sulphoaluminate cement grog.
Adopt TOPAS software, use Rietveld whole powder pattern fitting to carry out quantitative analysis of mineral to Belite-calcium barium sulphoaluminate cement grog, the mass percentage obtaining each crystal formation mineral is respectively: α-C 2s 4.8%, β-C 2s 86.3% and γ-C 2s 8.9%.Getting 420 grams, Belite-calcium barium sulphoaluminate cement grog and industrial gypsum 30 grams, to record 3 days ultimate compression strength according to GB/T17671-1999 " Test method for strength of hydraulic cement mortar " be 15.2MPa, and 28 days ultimate compression strength is 46.1MPa.
Reference examples 1:
Naturally cool to room temperature after being taken out from High Temperature Furnaces Heating Apparatus by the material burnt till at 1350 DEG C, obtain slow cooling Belite-calcium barium sulphoaluminate cement grog.
Adopt TOPAS software, use Rietveld whole powder pattern fitting to carry out quantitative analysis of mineral to Belite-calcium barium sulphoaluminate cement grog, the mass percentage obtaining each crystal formation mineral is respectively: β-C 2s 36.8% and γ-C 2s 63.2%.Getting 420 grams, Belite-calcium barium sulphoaluminate cement grog and industrial gypsum 30 grams, to record 3 days ultimate compression strength according to GB/T17671-1999 " Test method for strength of hydraulic cement mortar " be 10.1MPa, and 28 days ultimate compression strength is 37.4MPa.
Reference examples 2:
Air-cooled fast after the material burnt till at 1350 DEG C is taken out from High Temperature Furnaces Heating Apparatus, make its temperature in 3 minutes be down to less than 50 DEG C, obtain Belite-calcium barium sulphoaluminate cement grog.
Adopt TOPAS software, use Rietveld whole powder pattern fitting to carry out quantitative analysis of mineral to Belite-calcium barium sulphoaluminate cement grog, the mass percentage obtaining each crystal formation mineral is respectively: α-C 2s3.6%, β-C 2s 88.8% and γ-C 2s 7.6%.Getting 420 grams, Belite-calcium barium sulphoaluminate cement grog and industrial gypsum 30 grams, to record 3 days ultimate compression strength according to GB/T17671-1999 " Test method for strength of hydraulic cement mortar " be 19.7MPa, and 28 days ultimate compression strength is 55.4MPa.

Claims (4)

1. a type of cooling for Belite-calcium barium sulphoaluminate cement grog, its step is as follows.
2. air-cooled fast after 1350 DEG C of materials burnt till take out from High Temperature Furnaces Heating Apparatus, make its temperature in 20 ~ 120 seconds be down to less than 1000 DEG C.
3. reduce wind speed, make material temperature in 5 ~ 20 minutes be down to less than 550 DEG C.
4. improve wind speed, make material temperature in 30 ~ 150 seconds be down to less than 50 DEG C, obtain Belite-calcium barium sulphoaluminate cement grog.
CN201410652071.XA 2014-11-17 2014-11-17 Cooling way for belite-barium calcium sulfoaluminate cement clinker Pending CN104478247A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111253139A (en) * 2020-01-20 2020-06-09 武汉理工大学 Preparation method of high-performance structural material based on carbonation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1193613A (en) * 1998-03-02 1998-09-23 中国建筑材料科学研究院 Cement clinker and preparation thereof
CN1887766A (en) * 2006-07-17 2007-01-03 济南大学 Belite-calcium barium sulphoaluminate cement
CN103968671A (en) * 2014-05-30 2014-08-06 北京建筑材料科学研究总院有限公司 Device and method for cooling clinker by liquid oxygen and liquid nitrogen of cement kiln
JP2014185042A (en) * 2013-03-22 2014-10-02 Taiheiyo Cement Corp Cement composition

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1193613A (en) * 1998-03-02 1998-09-23 中国建筑材料科学研究院 Cement clinker and preparation thereof
CN1887766A (en) * 2006-07-17 2007-01-03 济南大学 Belite-calcium barium sulphoaluminate cement
JP2014185042A (en) * 2013-03-22 2014-10-02 Taiheiyo Cement Corp Cement composition
CN103968671A (en) * 2014-05-30 2014-08-06 北京建筑材料科学研究总院有限公司 Device and method for cooling clinker by liquid oxygen and liquid nitrogen of cement kiln

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
方汉中: "《世界建筑材料-发展水平和趋势》", 30 April 1989, article "五.水泥品种的最新发展" *
高礼雄等: "水泥熟料的高温力学性能", 《硅酸盐学报》, vol. 39, no. 1, 31 January 2011 (2011-01-31), pages 42 - 2 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111253139A (en) * 2020-01-20 2020-06-09 武汉理工大学 Preparation method of high-performance structural material based on carbonation

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Application publication date: 20150401