WO1991007360A1 - Verfahren zur herstellung von zementklinker und rückgewinnung von schwefeldioxid - Google Patents
Verfahren zur herstellung von zementklinker und rückgewinnung von schwefeldioxid Download PDFInfo
- Publication number
- WO1991007360A1 WO1991007360A1 PCT/DE1990/000897 DE9000897W WO9107360A1 WO 1991007360 A1 WO1991007360 A1 WO 1991007360A1 DE 9000897 W DE9000897 W DE 9000897W WO 9107360 A1 WO9107360 A1 WO 9107360A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- production
- anhydrite
- sulfuric acid
- raw meal
- products
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/48—Sulfur dioxide; Sulfurous acid
- C01B17/50—Preparation of sulfur dioxide
- C01B17/501—Preparation of sulfur dioxide by reduction of sulfur compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/48—Sulfur dioxide; Sulfurous acid
- C01B17/50—Preparation of sulfur dioxide
- C01B17/501—Preparation of sulfur dioxide by reduction of sulfur compounds
- C01B17/506—Preparation of sulfur dioxide by reduction of sulfur compounds of calcium sulfates
-
- 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
- C04B7/02—Portland cement
- C04B7/04—Portland cement using raw materials containing gypsum, i.e. processes of the Mueller-Kuehne type
-
- 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
-
- 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 and for the recovery of sulfur dioxide in the gypsum-sulfuric acid process.
- a method is also known with which SO is recovered from waste sulfuric acid with acid tar by feeding the reaction mixture formed by combining the components into the rotary kiln of the gypsum-sulfuric acid process so that the SO_ concentration of the furnace gases can be improved ( DD 260 616).
- Numerous processes for the desulphurization of flue gases have become known, in which waste products (REA) of different compositions are obtained, which can only be partially economically utilized.
- REA waste products
- SAV spray absorption processes
- CaSO-containing waste products are formed which, according to the current state of the art, are not used and have to be deposited in a costly manner (ZKG 11/88, pp. 576 - 582).
- the object of the invention is to develop a process for the production of cement clinker and for the recovery of sulfur dioxide, which is carried out with reduced overall expenditure in the gypsum-sulfuric acid process using waste products which have hitherto been difficult to use and in the natural anhydrite in the Gypsum-sulfuric acid process as CaO and S0 "carrier can be replaced by waste products in such a way that high-quality cement clinker and gases containing S0 ⁇ can be produced for the conversion to SO".
- the object is achieved in that, in the raw meal as a substitute for anhydrite, CaS0 "-containing products from flue gas desulfurization plants with a mass fraction in% of 5 to 80 are used.
- Particularly suitable waste products containing CaS0 are mixtures with a mass fraction in% of 21 to 80 CaS0 and 5 to 20 CaSO. It has proven to be very advantageous if the raw meal in the inlet area of the rotary kiln with waste sulfuric acid in a molar ratio H 2 SO 4. : CaS03 from 0.2 to 1.0 is sprayed. An acid with 78 to 100% H "SO" is preferably used as waste sulfuric acid.
- An advantage of the method according to the invention in which high-quality cement clinkers are obtained, consists in a reduced total energy expenditure for the raw meal production and firing process stages. Furthermore, the process results in waste products containing calcium sulfite which are free from waste products, thereby avoiding a landfill of these materials.
- Another advantage of the method according to the invention is that the deficit of S0- by spraying the raw meal with waste sulfuric acid. is at least equalized in the REA product compared to anhydrite and thus Gases with a higher S0 content are obtained, which can be converted to SO in existing plants with reduced energy consumption.
- the process also uses waste sulfuric acid free of waste products.
- cement clinker and SO-containing gases are made from the raw meal mixtures described in the following examples when metering in waste sulfuric acid.
- Raw meal mixture in which 50% of the anhydrite of a conventionally known mixture (consisting of anhydrite, brown coal filter ash (BFA), sand and coke) has been replaced by a waste product predominantly containing CaSO 4.
- BFA brown coal filter ash
- the raw meal mixture according to Example 2 can be produced without drying and grinding process by simple mixing, which is very advantageous in terms of energy.
- Table 3 Development of strength of the cements made from the clinker
- Example 1 8,000
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP90916712A EP0454817B1 (de) | 1989-11-20 | 1990-11-16 | Verfahren zur herstellung von zementklinker und rückgewinnung von schwefeldioxid |
DE59005950T DE59005950D1 (de) | 1989-11-20 | 1990-11-16 | Verfahren zur herstellung von zementklinker und rückgewinnung von schwefeldioxid. |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD33467589A DD294009A5 (de) | 1989-11-20 | 1989-11-20 | Verfahren zur herstellung von zementklinkern und rueckgewinnung von schwefeldioxid |
DDWPC04B/334676-5 | 1989-11-20 | ||
DD33467689A DD289036A5 (de) | 1989-11-20 | 1989-11-20 | Verfahren von zementklinkern und so tief 2-haltigen gasen |
DDWPC04B/334675-7 | 1989-11-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991007360A1 true WO1991007360A1 (de) | 1991-05-30 |
Family
ID=25748309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1990/000897 WO1991007360A1 (de) | 1989-11-20 | 1990-11-16 | Verfahren zur herstellung von zementklinker und rückgewinnung von schwefeldioxid |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0454817B1 (de) |
DE (1) | DE59005950D1 (de) |
WO (1) | WO1991007360A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4241540C1 (de) * | 1992-12-10 | 1993-12-16 | Bitterfelder Qualifizierungs U | Rohmehlmischung und Verfahren zur Herstellung von Zementklinker und Rückgewinnung von Schwefeldioxid |
DE4243763A1 (de) * | 1992-12-23 | 1994-06-30 | Kluger Karl Heinz Dr | REA-abprodukthaltige Rohmehlmischungen und Verfahren zur Herstellung von Zementklinker und SO¶2¶-haltigen Gasen |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4028126A (en) * | 1970-12-28 | 1977-06-07 | Onoda Cement Company, Ltd. | Process for manufacturing rapid hardening portland cement clinker |
DE3037056A1 (de) * | 1980-10-01 | 1982-04-22 | L. & C. Steinmüller GmbH, 5270 Gummersbach | Verwendung eines gemisches aus kalziumsulfit-halbhydrat und kalziumsulfat-dihydrat fuer die herstellung von zement |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3622688A1 (de) * | 1986-07-05 | 1988-01-14 | Metallgesellschaft Ag | Verfahren zur herstellung von zementklinker und so(pfeil abwaerts)2(pfeil abwaerts)-haltigen abgasen |
-
1990
- 1990-11-16 WO PCT/DE1990/000897 patent/WO1991007360A1/de active IP Right Grant
- 1990-11-16 DE DE59005950T patent/DE59005950D1/de not_active Expired - Fee Related
- 1990-11-16 EP EP90916712A patent/EP0454817B1/de not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4028126A (en) * | 1970-12-28 | 1977-06-07 | Onoda Cement Company, Ltd. | Process for manufacturing rapid hardening portland cement clinker |
DE3037056A1 (de) * | 1980-10-01 | 1982-04-22 | L. & C. Steinmüller GmbH, 5270 Gummersbach | Verwendung eines gemisches aus kalziumsulfit-halbhydrat und kalziumsulfat-dihydrat fuer die herstellung von zement |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4241540C1 (de) * | 1992-12-10 | 1993-12-16 | Bitterfelder Qualifizierungs U | Rohmehlmischung und Verfahren zur Herstellung von Zementklinker und Rückgewinnung von Schwefeldioxid |
DE4243763A1 (de) * | 1992-12-23 | 1994-06-30 | Kluger Karl Heinz Dr | REA-abprodukthaltige Rohmehlmischungen und Verfahren zur Herstellung von Zementklinker und SO¶2¶-haltigen Gasen |
Also Published As
Publication number | Publication date |
---|---|
EP0454817A1 (de) | 1991-11-06 |
DE59005950D1 (de) | 1994-07-07 |
EP0454817B1 (de) | 1994-06-01 |
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