WO2010057825A1 - Procédé pour préparer du clinker - Google Patents
Procédé pour préparer du clinker Download PDFInfo
- Publication number
- WO2010057825A1 WO2010057825A1 PCT/EP2009/065039 EP2009065039W WO2010057825A1 WO 2010057825 A1 WO2010057825 A1 WO 2010057825A1 EP 2009065039 W EP2009065039 W EP 2009065039W WO 2010057825 A1 WO2010057825 A1 WO 2010057825A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- slag
- cao
- sio
- mgo
- production
- Prior art date
Links
- 239000004568 cement Substances 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 235000019738 Limestone Nutrition 0.000 claims abstract description 9
- 239000006028 limestone Substances 0.000 claims abstract description 9
- 239000004576 sand Substances 0.000 claims abstract description 3
- 239000004927 clay Substances 0.000 claims abstract 3
- 239000002893 slag Substances 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 28
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 19
- 239000000292 calcium oxide Substances 0.000 claims description 16
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 11
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 239000000395 magnesium oxide Substances 0.000 claims description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 8
- 239000000654 additive Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000003746 solid phase reaction Methods 0.000 claims description 2
- 238000010671 solid-state reaction Methods 0.000 claims description 2
- 229910000272 alkali metal oxide Inorganic materials 0.000 claims 1
- 239000000470 constituent Substances 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 claims 1
- 238000010309 melting process Methods 0.000 claims 1
- 238000010310 metallurgical process Methods 0.000 claims 1
- 239000007858 starting material Substances 0.000 claims 1
- 238000001354 calcination Methods 0.000 abstract description 4
- 239000003818 cinder Substances 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 5
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910015189 FeOx Inorganic materials 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 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
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/17—Mixtures thereof with other inorganic cementitious materials or other activators with calcium oxide containing activators
-
- 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
Definitions
- the invention relates to a process for the production of cement clinker.
- cement consists of a mixture of calcium oxide (CaO), silicon oxide (SiO 2 ) and aluminum oxide (Al 2 O 3) and optionally further additives such as magnesium oxide (MgO) and iron oxide (Fe 2 O 3), with sintering or firing of the processed raw materials in
- CaO calcium oxide
- SiO 2 silicon oxide
- Al 2 O 3 aluminum oxide
- MgO magnesium oxide
- Fe 2 O 3 iron oxide
- the properties of the cement clinker are mainly determined by the mass ratio of calcium oxide (CaO) and silicon oxide (SiO 2 ).
- cement clinker is energy-consuming. Much of the energy required for cement preparation is for the production of CaO from the natural raw material "limestone", the calcium carbonate (CaCO3) contains, by driving ( “calcining / deacidifying") of the CO 2 at 800 - requires 900 0 C. Therefore, a continuously increasing proportion of the energy consuming produced cement clinker, which is produced by sintering of CaO with SiO 2, and lesser amounts of Al 2 ⁇ 3, MgO and Fe 2 ⁇ 3 at 1400 0 C, replaced by granulated blast furnace slag with essentially the same components.
- blast furnace slag in particular has a lower Ca content, which lengthens the curing process of the cement clinker. Therefore, it can not be waived for sufficiently short curing times on the Ca richer and energy-intensive clinker to be produced.
- the object of the invention is to provide a method for the production of cement, in which the energy requirement is reduced.
- the integration of cement production with the formation of slag results in considerable advantages.
- the liquid blast furnace slag was cooled without using the heat content: This is done either slowly in the so-called slag bed to z. B. slag z. B. for road construction, or quickly by quenching with large amounts of water, so that the slag crumbles by internal tensions to a largely glassy granules, the so-called blastfurnace slag, which then goes in this form as a rakers replacement in cement production.
- blast furnace slag in the liquid state in particular is brought into contact with limestone powder, so that the calcination proceeds with the use of the slag's heat content If the heat transfer takes place by direct contact between slag and limestone flour, the released CO2 can on the one hand
- the powdered CaO can immediately form the cementitious compounds with the liquid slag without requiring an additional sintering process, thus enriching the slag with Ca without further energy consumption.
- blast furnace slag can be used for the process according to the invention also steel mill slag, as obtained in particular in electric furnace
- Figure 1 is a process scheme for the preparation of cement according to the prior art and Figure 2 shows the procedure in the invention.
- a rotary kiln (so-called “rotary kiln") is used, which is designated by 10 in Figure 1.
- the input of the rotary kiln 10 is a mixture of sand as the basis for silicon dioxide (SiO 2) and alumina as the basis for aluminum oxide (Al 2 O 3
- limestone containing calcium carbonate (CaCO 3) as a base for calcium oxide (CaO) is fed to the rotary kiln 10.
- Corresponding functional units are denoted by 11 and 12. Additions of other compounds containing magnesium (Mg), sodium (Na), potassium (K) and / or sulfur (S) are not discussed in detail.
- Calcinator is first a process called “deacidification” in practice, the so-called calcination, wherein the CO2 is expelled at a temperature between 600 and 1000 0 C. Subsequently, a sintering takes place at about 1450 ° C. To do this, the rotary kiln In this case, CO2 is normally released into the environment, with prior gas purification being required.
- the product of the rotary kiln 10 is the so-called clinker.
- clinker In the clinker, it depends significantly on the mass ratio of calcium oxide and silicon oxide, by the factor
- the clinker normally has an ⁇ > 2. Milling and subsequent mixing with the known additives takes place, in which case in particular the granules are fed to a slag produced in a blast-furnace process.
- the result of the process after mixing - even with small amounts of aggregates - is the cement intended for use in the construction industry, in particular, as mortar and / or concrete.
- the liquid slag 1 obtained in a conventional blast furnace process contains CaO, MgO, SiO 2 , Al 2 O 3 and FeOx, the factor ⁇ defined above lying between 1 and 1.5.
- water cooling has hitherto been carried out in accordance with reference numbers. to win blastfurnace slag. Subsequently, the ashes are ground with the clinker, as already described in detail above.
- powdered CaO is added to the slag in the molten state in order to increase the factor ⁇ .
- at least a portion of the limestone powder is first heated and deacidified by the waste heat of the formed and finally to about 100 0 C as a cooling Klinkens.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
La présente invention concerne la préparation de clinker par calcination du calcaire en ajoutant du sable et de l'alumine dans un four rotatif. Le produit de base (clinker) est ensuite mélangé aux cendres granulées d'un laitier. Selon l'invention, le laitier n'est pas introduit dans le clinker mais dans le mélange calcaire/CaO avec une consistance fluide, ce qui permet une économie d'énergie notable ainsi qu' meilleur bilan CO2.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008058573A DE102008058573A1 (de) | 2008-11-21 | 2008-11-21 | Verfahren zur Herstellung von Zementklinker |
DE102008058573.4 | 2008-11-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010057825A1 true WO2010057825A1 (fr) | 2010-05-27 |
Family
ID=41463180
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/065039 WO2010057825A1 (fr) | 2008-11-21 | 2009-11-12 | Procédé pour préparer du clinker |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102008058573A1 (fr) |
WO (1) | WO2010057825A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116462425B (zh) * | 2023-05-18 | 2023-10-20 | 浙江钙科科技股份有限公司 | 基于互联网的流态化氧化钙悬浮煅烧设备及工艺 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1910676A (en) * | 1929-10-04 | 1933-05-23 | Bruhn Bruno | Process of making cement from fluid slag |
JPS5066526A (fr) * | 1973-10-17 | 1975-06-04 | ||
WO2001055457A1 (fr) * | 2000-01-28 | 2001-08-02 | Holcim Ltd. | Procede de production de matieres de broyage puzzolaniques destinees a l'industrie du ciment, a partir de scories d'acier, par utilisation d'un bain metallique de reduction |
EP1354969A2 (fr) * | 2002-04-10 | 2003-10-22 | ThyssenKrupp Stahl AG | Procédé de conditionnement de laitier liquide de haut-fourneau |
US20040020411A1 (en) * | 2000-05-24 | 2004-02-05 | Francois Sorrentino | Method for oxidising treatment of steel works slag and resulting ld slag |
CN101302568A (zh) * | 2008-05-23 | 2008-11-12 | 郑州永通特钢有限公司 | 一种有色金属工业废渣综合回收利用的方法 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT83U1 (de) * | 1993-07-01 | 1995-01-25 | Holderbank Financ Glarus | Verfahren zur herstellung von zementklinker aus stahlschlacke |
FR2820420B1 (fr) * | 2001-02-02 | 2003-12-12 | Lafarge Sa | Procede de traitement oxydant des laitiers d'acierie pour l'obtention de materiaux cimentaires |
-
2008
- 2008-11-21 DE DE102008058573A patent/DE102008058573A1/de not_active Withdrawn
-
2009
- 2009-11-12 WO PCT/EP2009/065039 patent/WO2010057825A1/fr active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1910676A (en) * | 1929-10-04 | 1933-05-23 | Bruhn Bruno | Process of making cement from fluid slag |
JPS5066526A (fr) * | 1973-10-17 | 1975-06-04 | ||
WO2001055457A1 (fr) * | 2000-01-28 | 2001-08-02 | Holcim Ltd. | Procede de production de matieres de broyage puzzolaniques destinees a l'industrie du ciment, a partir de scories d'acier, par utilisation d'un bain metallique de reduction |
US20040020411A1 (en) * | 2000-05-24 | 2004-02-05 | Francois Sorrentino | Method for oxidising treatment of steel works slag and resulting ld slag |
EP1354969A2 (fr) * | 2002-04-10 | 2003-10-22 | ThyssenKrupp Stahl AG | Procédé de conditionnement de laitier liquide de haut-fourneau |
CN101302568A (zh) * | 2008-05-23 | 2008-11-12 | 郑州永通特钢有限公司 | 一种有色金属工业废渣综合回收利用的方法 |
Also Published As
Publication number | Publication date |
---|---|
DE102008058573A1 (de) | 2010-05-27 |
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