WO2007080431A1 - Method of utilization of dust, dry or as water suspension, separated from furnaces gases in production of cement clinker with dry and wet method - Google Patents
Method of utilization of dust, dry or as water suspension, separated from furnaces gases in production of cement clinker with dry and wet method Download PDFInfo
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- WO2007080431A1 WO2007080431A1 PCT/GE2006/000001 GE2006000001W WO2007080431A1 WO 2007080431 A1 WO2007080431 A1 WO 2007080431A1 GE 2006000001 W GE2006000001 W GE 2006000001W WO 2007080431 A1 WO2007080431 A1 WO 2007080431A1
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- 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
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/436—Special arrangements for treating part or all of the cement kiln dust
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/2016—Arrangements of preheating devices for the charge
- F27B7/2025—Arrangements of preheating devices for the charge consisting of a single string of cyclones
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- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Definitions
- Claiming inventions united with common inventive idea, concern to cement production and preservation of nature. More particularly, they can be used in production of ground component of cements - clinker, with dry and wet method, using dust, extracted from furnace smokes as needed raw material of second time use, avoiding, at the same time, pollution of nature.
- Control of the process is complicated in general and particularly for personnel (operator), and, as a result, technological regimes and homogeneity of raw material, inputting to furnace from cold or hot sides are disturbed.
- the quality of produced clinker is deteriorated. This is caused also, by incompatibility of chemical composition of dust with composition of inputted raw material. Also in this case, most part of inputted dust (provided with blowing of air) is caught as dust again with high velocity of outputting furnace gases and returned to filters, for repeated suppressing.
- Shortcoming of prototype is technological complication too. It can not provide chemical homogeneity of returned dust and raw materials and stable quality of clinker, does not provide complete utilization of dust (which makes 5 to 20% of raw materials). There will not be provided ecological safety. The chemical homogeneity of dust with raw material are not provided and physical fractioning of dust still does not coincide with physical fractionitig of raw materials inputted to furnace. And this inhomogeneity has negative effect on quality of clinker.
- the method provides wetting of dust, separated from furnace gases, treatment with sea water (“cure”) and carbon dioxide (gas), washing, and after that inputting of dusty water to technological cycle of producing of cement clinker (namely into the furnace), and decomposition of alkalis and sulphates ('cure') in intermediate sea water aiming ecological safety.
- Second and third variants of invention and their prototype have following distinctive sign: they provide return of dust suppressed in cement clinker production, to technological cycle of clinker production with wet method.
- Shortcoming of prototype is complication, big expenses, including needs of water and energy, and even counting that it provides homogeneity of inputted in furnace dust and raw materials, and stable quality of clinker, nevertheless it does not provide complete utilization of all quantity of dust (which makes 5 to 20 % of raw materials), for the part of it is still taken away.
- the ecological safety is not completely provided too. Assuming that homogeneity of chemical composition of dust and slime is provided, fractional composition, nevertheless, does not correspond to physical fractional composition of raw material (slime), inputting in furnace. And this inhomogeneiry has negative effect on quality of clinker.
- Declared inventions united with common invention idea, are directed on solution of problem of technological process simplification, total utilization of waste, reduction of expenses including rational use of water, preservation of environment from ecological pollution and, at the same time 5 retaining quality of product (clinker).
- Set problem by first variant of declaring invention is attained ⁇ when utilizing dust, dry separated from furnace gases with dry method in cement clinker production, it is provided its return to technological cycle of clinker production with dry method, which, in its turn, provides stages of joint milling-drying of grinded limestone and preparatory grinded-dried clay in mill of raw materials, blending and correction of composition of formed mixture in mixing silo towers and its roasting in rotary kiln with cyclone heat exchanger, and before outputting of furnace gases to atmosphere - separation- suppression of dust in dry form from them.
- Separated-suppresses dust is returned to technological cycle on step of joint milling-drying of grinded limestone and preparatory grinded-dried clay in mill of raw materials.
- dust, separated-suppressed in dry form from furnace gases 5 is returned to technological process of cement clinker production not in same place of roasting furnace (as in the known method), but on stage, much more before, in mill of raw materials, together with grinded limestone and preparatory grinded-dried clay. That is, where it has maximal homogeneity with inputting raw material on the one hand, and on the other, where outputted mixture before inputting to roast furnace, in any case is blended and corrected by composition, provided with technological cycle to get necessary quality clinker.
- Whole quantity of dust must be returned to technological process, for dust is returned on such stage, that its inputting is taken in accordance with quality of product (clinker). That is, chemical- technical data of dust, by point of view of compatibility with technological process of milling in mill of raw material (limestone and clay), is not problem, for there is provided for homogenization.
- Set problem by second variant of claiming invention is attained, when utilizing dust, extracted in dry form from furnace gases in cement clinker production with wet method, there is provided its return to technological cycle of clinker production with wet method, which, in its turn, provides stages of milling with wet method of grinded limestone and preparatory grinded-shaken-up clay in mills of raw materials, correction of composition of formed slime and its roasting in rotary kiln, and before outputting of furnace gases to atmosphere - separation-suppressing of dust in dry form from them. Dust is mixed with water, the composition of formed suspension is controlled and suspension is returned to technological cycle on step of wet milling of grinded limestone and grinded-shaken-up clay in mill of raw materials.
- the 55-85% content of water is fixed by its adding or extracting.
- the 55-85% content of water is fixed by its adding or extracting
- Set problem by third variant of claimed invention is attained, when utilizing dust in form of water suspension, extracted from furnace gases, in production of cement clinker with wet method, there is providing control of its composition and return to technological cycle of clinker production with wet method, which, in its turn, provides stages of milling with wet method of grinded limestone and grinded-shaken-up clay in mill of raw materials, correction of composition of formed slime and its roasting in rotary kiln, and separation-suppressing of dust in form of water suspension from furnace gases before outputting them to atmosphere.
- water suspension separated dust is returned to technological cycle on stage of wet milling of grinded limestone and grinded-shaken-up clay in mill of raw materials .
- the 55-85% content of water is fixed by its adding or extracting.
- Fig, 1 unit-scheme of cement clinker production with dry method, with separation of dust in dry form from furnaces gases and retuning in cycle with utilization;
- Fig, 2 Unit-scheme of cement clinker production with wet method, with separation of dust in dry form from furnace gases and returning in cycle with utilization;
- Fig, 3 Unit-scheme of cement clinker production with wet method, with separation of dust from furnace gases by means of water and returning in cycle with utilization.
- the method of utilization of dust, dry separated from furnace gases, in cement clinker production is following: Suppresses dust is accumulated in collection-accumulating silo towers. After that, dust is inputted to mill of raw materials with blending, in accordance with possibility to keep normal titre in. formed mixture and its correction. Further, through silo tower and heat exchanger, dust is inputted in rotary kiln of roasting, from there is produced finally, clinker. Separated dust from gasses with dry method (for example by means of electrostatic precipitations, dust chambers, cyclones and bad filters) is accumulated in collection-accumulating silo towers and is returned back.
- dry method for example by means of electrostatic precipitations, dust chambers, cyclones and bad filters
- Dust is saturated with water. It can be done in collection basin. In same one is done mixing (constantly or periodically) and control of composition of suspension. That is, providing with 55-85% of water in composition for following pumping to mill of raw materials by means of pumps. That is, optimal concentration for inputting to mill of raw materials,- together with limestone, although, control is possible in mill of raw materials also, by means of device of water input, or with closing of that.
- Alkali content of slime, formed in mill of raw materials and other components in given cycle is corrected with known method and after that slime is inputted in rotary kiln of roasting, producing, finally, from there clinker. Dust, separated from gases, with dry method (for example by means of electrostatic precipitators, dust chambers, cyclones and bad filters) is saturated with water again, formed suspension and etc., retimed back.
- Method of utilization of dust as water suspension separated from furnace gases in cement clinker production with wet method (by third variant of invention) is following: It differs from second method only, that here, separated dust with wet method (for example with scrubbers and cyclone- washers) already is suspension with water. There must be created necessary concentration, mentioned in second variant of invention, and in same way suspension is returned to process.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Invention concern to field of production of cement ground component - clinker with dry and wet method and utilization of dust, suppressed from furnace gases as secondary raw material, and preservation on nature. Inventions are directed on solution of problems of process simplification, whole utilization of waste and reduction of expenses with keeping of clinker quality. Method of utilization of dust, in dry form or as water suspension, separated from finance gases, in production of cement clinker with dry and wet method, provides its return to technological cycle of clinker production, which, in its turn, provides stages of joint milling, with dry or wet method, of grinded limestone and preparatory grinded-dried clay in mill of raw material, blending and correction of mixture composition in mixing silo towers, or of slime, and its roasting in rotary kiln, and before outputting of furnace gases to atmosphere - separation-suppressing of dust from them, in dry form or as water suspension. Separated-suppressed dust is returned to technological cycle on stage of joint milling in mill or raw material, grinded-dried or graded-shaken-up clay, dust, in necessary rates, is accumulated in inputting accumulating silo towers. Before return of suspension to technological cycle, there is fixed 55-85% of water with its adding or extracting. Before return of suspension to technological cycle, that is inputted in accumulating pool, equipped with mixer.
Description
Method of Utilization of Dust, Dry or as Water Suspension, Separated from Furnace Gases in Production of Cement Clinker with Dry and Wet Method
Technical Field
Claiming inventions, united with common inventive idea, concern to cement production and preservation of nature. More particularly, they can be used in production of ground component of cements - clinker, with dry and wet method, using dust, extracted from furnace smokes as needed raw material of second time use, avoiding, at the same time, pollution of nature.
Background Art The methods of return of suppressed dust in cement production are well known. Each one of them, in various ways, tries to solve problem of direct return of dust in process of cement production, which mainly consists in incompatibility of dust, suppressed from furnace aspiration gases, with composition of raw materials inputting in roasting furnace in process of cement clinker production. Mainly the question is about incompatibility of alkalis and sulphates that affects the quality of clinker.
The most similar, by its distinctive signs, to invention declared in the first item of claims is the method of return of dust, separated (suppressed) from furnace gases, to technological process, so called "Riga method", well known in cement production with dry method. When using this method, dust is returned back to rotary kiln of roasting, from cold or hot side.
Declared invention and its prototype have following similar distinctive sign: they provide return of dust, separated from furnace gases, to technological cycle of cement clinker production with dry method
Shortcoming of mentioned method is that control of furnace and technological processes are complicated, quality of product is deteriorated, nevertheless, part of suppressed dust is lost without use (CM. K). H. JJ1QmKQ3 M.E.KpefiMep. T.A.OrapKOBa «Hajia#κa H τeπjioτexHHHecκπe HcπtrraHHs Bpamaiomπxca πeπefi Ha u;eMeHTHfcrx 3aBO^ax», MocKBa, 1966, cτp.76-86). Suppressed dust by means of pumping devices, very complicated constructively and technologically, is inputted to rotary kiln from its end or head. Control of the process is complicated in general and particularly for personnel (operator), and, as a result, technological regimes and homogeneity of raw material, inputting to furnace from cold or hot sides are disturbed. The quality of produced clinker is deteriorated. This is caused also, by incompatibility of chemical composition of dust with composition of inputted raw material. Also in this case, most part of inputted dust (provided with blowing of air) is caught as dust again with high velocity of outputting furnace gases and returned to filters, for repeated suppressing. Shortcoming of prototype is technological complication too. It can not provide chemical homogeneity of returned dust and raw materials and stable quality of clinker, does not provide complete utilization of dust (which makes 5 to 20% of raw materials). There will not be provided ecological safety. The chemical homogeneity of dust with raw material are not provided and physical fractioning of dust still does not coincide with physical fractionitig of raw materials inputted to furnace. And this inhomogeneity has negative effect on quality of clinker.
Mentioned above so called "Riga method" dry suppressing of dust is used in cement clinker production with wet method also.
There are also known methods of dust utilization, separated (suppresses) form furnace gases, with dry or wet method (see patents and applications: JP8091889; CA1144189; GB1147502; GBl 108589; JP2004041978; JP 2002316119; JP 11011994; US 4911757; KR9200876; JP 2000034142; JPl 1100243; DE19815205; JPl 1171205; JP10231151; JP9118551; CN1076917; DE3729695; US2004040472).
Main direction of them is alkali extraction (more correctly, reducing of alkali ratio) in dust by means of water and inputting, together with water, in roasting furnace again. Such approach is so complicated and requires so much water (at the same time there is dissolved less when half of alkalis in water), that agency of nature protection of USA had finally prohibited alkali extraction, for ecological problem still was not solved.
The most similar, by its distinctive signs, to the second and third variants of declaring invention (3rd and 6th items of claims) is the method in accordance with USA. patent - US6331207, chosen as prototype.
The method provides wetting of dust, separated from furnace gases, treatment with sea water ("cure") and carbon dioxide (gas), washing, and after that inputting of dusty water to technological cycle of producing of cement clinker (namely into the furnace), and decomposition of alkalis and sulphates ('cure') in intermediate sea water aiming ecological safety.
Second and third variants of invention and their prototype have following distinctive sign: they provide return of dust suppressed in cement clinker production, to technological cycle of clinker production with wet method. Shortcoming of prototype is complication, big expenses, including needs of water and energy, and even counting that it provides homogeneity of inputted in furnace dust and raw materials, and stable quality of clinker, nevertheless it does not provide complete utilization of all quantity of dust
(which makes 5 to 20 % of raw materials), for the part of it is still taken away. The ecological safety is not completely provided too. Assuming that homogeneity of chemical composition of dust and slime is provided, fractional composition, nevertheless, does not correspond to physical fractional composition of raw material (slime), inputting in furnace. And this inhomogeneiry has negative effect on quality of clinker.
Problem of the Invention
Declared inventions, united with common invention idea, are directed on solution of problem of technological process simplification, total utilization of waste, reduction of expenses including rational use of water, preservation of environment from ecological pollution and, at the same time5 retaining quality of product (clinker).
Disclosure of the Invention
Set problem by first variant of declaring invention is attained^ when utilizing dust, dry separated from furnace gases with dry method in cement clinker production, it is provided its return to technological cycle of clinker production with dry method, which, in its turn, provides stages of joint milling-drying of grinded limestone and preparatory grinded-dried clay in mill of raw materials, blending and correction of composition of formed mixture in mixing silo towers and its roasting in rotary kiln with cyclone heat exchanger, and before outputting of furnace gases to atmosphere - separation- suppression of dust in dry form from them. Separated-suppresses dust is returned to technological cycle on step of joint milling-drying of grinded limestone and preparatory grinded-dried clay in mill of raw materials.
Before returning to technological cycle, dust is accumulated in needed rates in inputting-accumulating silo towers.
First variant of claimed invention concerning its prototype has following distinctive signs:
- Separated-suppresses dust is returned to technological cycle on step of joint milling-drying of grinded limestone and preparatory grinded-dried clay in mill of raw materials;
- Before returning to technological cycle, dust is accumulated in needed rates in inputting-accumulating silo towers.
There is cause and effect connection between distinctive signs and obtaining result: dust, separated-suppressed in dry form from furnace gases5 is returned to technological process of cement clinker production not in same place of roasting furnace (as in the known method), but on stage, much more before, in mill of raw materials, together with grinded limestone and preparatory grinded-dried clay. That is, where it has maximal homogeneity with inputting raw material on the one hand, and on the other, where outputted mixture before inputting to roast furnace, in any case is blended and corrected by composition, provided with technological cycle to get necessary quality clinker. Whole quantity of dust must be returned to technological process, for dust is returned on such stage, that its inputting is taken in accordance with quality of product (clinker). That is, chemical- technical data of dust, by point of view of compatibility with technological process of milling in mill of raw material (limestone and clay), is not problem, for there is provided for homogenization.
Set problem by second variant of claiming invention is attained, when utilizing dust, extracted in dry form from furnace gases in cement clinker production with wet method, there is provided its return to technological cycle of clinker production with wet method, which, in its turn, provides stages of milling with wet method of grinded limestone and preparatory grinded-shaken-up clay in mills of raw materials, correction of composition
of formed slime and its roasting in rotary kiln, and before outputting of furnace gases to atmosphere - separation-suppressing of dust in dry form from them. Dust is mixed with water, the composition of formed suspension is controlled and suspension is returned to technological cycle on step of wet milling of grinded limestone and grinded-shaken-up clay in mill of raw materials.
Before retiming of suspension to technological cycle, the 55-85% content of water is fixed by its adding or extracting.
Before retiming of suspension to technological cycle, it is inputted to accumulating basin, equipped with mixer.
Second variant of declaring invention concerning its prototype has following distinctive signs:
- Dust is mixed with water, the composition of formed suspension is controlled and suspension is returned to technological cycle on step of wet milling of grinded limestone and grinded-shaken-up clay in mill of raw materials;
- Before retuning of suspension to technological cycle, the 55-85% content of water is fixed by its adding or extracting;
- Before retuning of suspension to technological cycle, it is inputted to accumulating basin, equipped with mixer.
Set problem by third variant of claimed invention is attained, when utilizing dust in form of water suspension, extracted from furnace gases, in production of cement clinker with wet method, there is providing control of its composition and return to technological cycle of clinker production with wet method, which, in its turn, provides stages of milling with wet method of grinded limestone and grinded-shaken-up clay in mill of raw materials, correction of composition of formed slime and its roasting in rotary kiln, and separation-suppressing of dust in form of water suspension from furnace
gases before outputting them to atmosphere. As water suspension separated dust is returned to technological cycle on stage of wet milling of grinded limestone and grinded-shaken-up clay in mill of raw materials .
Before retuning of as water suspension separated dust to technological cycle, the 55-85% content of water is fixed by its adding or extracting.
Before returning of as water suspension separated dust to technological cycle, it is inputted to accumulating basin, equipped with mixer.
Third variant of declaring invention concerning its prototype has following distinctive signs: - As water suspension separated dust is returned to technological cycle on stage of wet milling of grinded limestone and grinded-shaken-up clay in mill of raw materials;
- Before retuning of as water suspension separated dust to technological cycle, the 55-85% content of water is fixed by its adding or extracting; - Before returning of as water suspension separated dust to technological cycle, it is inputted to accumulating basin, equipped with mixer.
Between distinctive signs of second and third variant of claimed invention and obtaining result there is the following caused and effect connection: dust, in dry or wet form separated-suppressed from furnace gases, is retimed together with water to technological process of cement clinker production, not to the roasting furnace (as in the known methods), but on stage much more before, in mill of raw materials, together with grinded limestone and grinded-shaken-up clay. That is there, where, on the one hand, is maximal homogeneity on stage of raw material inputting, and on the other, where outputted slime, before inputting to roasting furnace, in any case is corrected by composition, provided with technological cycle, to get necessary quality of clinker. Whole quantity of dust must be retuned, and technological process is tolerant to this, for dust is returned on the very early stage of
process that does not affect the quality of product (clinker). That is, chemical- technological data of dust, by point of view of "compatibility" with technological process, inputting in mill of raw materials (limestone and clay) grinding, is not a problem, for there is provided homogenization.
Best Variants of Realization of the Invention
Essence of inventions is illustrated on figures, where is shown: Fig, 1 — unit-scheme of cement clinker production with dry method, with separation of dust in dry form from furnaces gases and retuning in cycle with utilization;
Fig, 2 - Unit-scheme of cement clinker production with wet method, with separation of dust in dry form from furnace gases and returning in cycle with utilization;
Fig, 3 - Unit-scheme of cement clinker production with wet method, with separation of dust from furnace gases by means of water and returning in cycle with utilization.
The method of utilization of dust, dry separated from furnace gases, in cement clinker production, is following: Suppresses dust is accumulated in collection-accumulating silo towers. After that, dust is inputted to mill of raw materials with blending, in accordance with possibility to keep normal titre in. formed mixture and its correction. Further, through silo tower and heat exchanger, dust is inputted in rotary kiln of roasting, from there is produced finally, clinker. Separated dust from gasses with dry method (for example by means of electrostatic precipitations, dust chambers, cyclones and bad filters) is accumulated in collection-accumulating silo towers and is returned back.
It is tested in laboratory, that chemical-physical date of suppresses dust and main raw materials are almost similar, there is needed only physical
approximating and correction. It confirms possibility of practical use of submitted method and attainment of effect.
Method of utilization of dust dry separated from furnace gases in cement clinker production, with wet method (by second variant of invention) is following: Dust is saturated with water. It can be done in collection basin. In same one is done mixing (constantly or periodically) and control of composition of suspension. That is, providing with 55-85% of water in composition for following pumping to mill of raw materials by means of pumps. That is, optimal concentration for inputting to mill of raw materials,- together with limestone, although, control is possible in mill of raw materials also, by means of device of water input, or with closing of that. Alkali content of slime, formed in mill of raw materials and other components in given cycle is corrected with known method and after that slime is inputted in rotary kiln of roasting, producing, finally, from there clinker. Dust, separated from gases, with dry method (for example by means of electrostatic precipitators, dust chambers, cyclones and bad filters) is saturated with water again, formed suspension and etc., retimed back.
Method of utilization of dust, as water suspension separated from furnace gases in cement clinker production with wet method (by third variant of invention) is following: It differs from second method only, that here, separated dust with wet method (for example with scrubbers and cyclone- washers) already is suspension with water. There must be created necessary concentration, mentioned in second variant of invention, and in same way suspension is returned to process.
Claims
1. Method of utilization of dust, dry separated from furnace gases in production of cement clinker with dry method, providing its returning to technological cycle of clinker production with dry method, which, in its turn, provides stages of joint milling-drying of grinded limestone and preparatory grinded-dried clay in mill of raw materials, blending and correction of composition of formed mixture in mixing silo towers and its roasting in rotary kiln with cyclone heat exchanger, and before outputting of furnace gases to atmosphere - separation-suppression of dust in dry form from them, characterized by, that separated-suppresses dust is returned to technological cycle on step of joint milling-drying of grinded limestone and preparatory grinded-dried clay in mill of raw materials;
2. Method by item 1, characterized by, that before returning to technological cycle, dust is accumulated in needed rates in inputting- accumulating silo towers;
3. Method of utilization of dust, dry separated from furnace gases in production of cement clinker with wet method, providing its retiming to technological cycle of clinker production with wet method, which, in its turn, provides stages of milling with wet method of grinded limestone and preparatory grinded-shaken-up clay in mills of raw materials, correction of composition of formed slime and its roasting in rotary kiln, and before outputting of furnace gases to atmosphere - separation-suppressing of dust in dry form from them, characterized by,- that dust is mixed with water, the composition of formed suspension is controlled and suspension is returned to technological cycle on step of wet milling of grinded limestone and grinded-shaken-up clay in mill of raw materials;
4. Method by item 3, characterized by, that before retiming of suspension to technological cycle, the 55-85% content of water is fixed by its adding or extracting;
5. Method by item 3, characterized by, that before retuning of suspension to technological cycle, it is inputted to accumulating basin, equipped with mixer;
6. Method of utilization of dust, as water suspension separated from furnace gases in production of cement clinker with wet method, providing control of its composition and return to technological cycle of clinker production with wet method, which, in its turn, provides stages of milling with wet method of grinded limestone and grinded- shaken-up clay in mill of raw materials, correction of composition of formed slime and its roasting in rotary kiln, and separation-suppressing of dust in form of water suspension from furnace gases before outputting them to atmosphere, characterized by, that as water suspension separated dust is returned to technological cycle on stage of wet milling of grinded limestone and grinded-shaken-up clay in mill of raw materials;
7. Method by item 6, characterized by, that before retuning of as water suspension separated dust to technological cycle, the 55-85% content of water is fixed by its adding or extracting;
8. Method by item 6, characterized by, that before returning of as water suspension separated dust to technological cycle, it is inputted to accumulating basin, equipped with mixer,
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/GE2006/000001 WO2007080431A1 (en) | 2006-01-13 | 2006-01-13 | Method of utilization of dust, dry or as water suspension, separated from furnaces gases in production of cement clinker with dry and wet method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/GE2006/000001 WO2007080431A1 (en) | 2006-01-13 | 2006-01-13 | Method of utilization of dust, dry or as water suspension, separated from furnaces gases in production of cement clinker with dry and wet method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112551924A (en) * | 2021-01-22 | 2021-03-26 | 肖水 | Preparation method of environment-friendly dry powder cement |
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|---|---|---|---|---|
| SU551282A1 (en) * | 1975-12-01 | 1977-03-25 | Казахский Химико-Технологический Институт | Raw mix for cement clinker |
| SU639827A1 (en) * | 1977-07-07 | 1978-12-30 | Московский Ордена Ленина И Ордена Трудового Красного Знамени Химикотехнологический Институт Им.Д.И.Менделеева | Raw mix for obtaining portland clinker |
| RU2052754C1 (en) * | 1991-12-10 | 1996-01-20 | Александр Петрович Капишников | System of combination utilization of secondary resources in production of cement |
-
2006
- 2006-01-13 WO PCT/GE2006/000001 patent/WO2007080431A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU551282A1 (en) * | 1975-12-01 | 1977-03-25 | Казахский Химико-Технологический Институт | Raw mix for cement clinker |
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| CN112551924A (en) * | 2021-01-22 | 2021-03-26 | 肖水 | Preparation method of environment-friendly dry powder cement |
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