CN102260052A - Unlimited compatible method for producing cement clinker by using carbide slag and limestone as raw material - Google Patents
Unlimited compatible method for producing cement clinker by using carbide slag and limestone as raw material Download PDFInfo
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- CN102260052A CN102260052A CN2010101970524A CN201010197052A CN102260052A CN 102260052 A CN102260052 A CN 102260052A CN 2010101970524 A CN2010101970524 A CN 2010101970524A CN 201010197052 A CN201010197052 A CN 201010197052A CN 102260052 A CN102260052 A CN 102260052A
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- decomposing furnace
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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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
Abstract
The invention relates to an unlimited compatible method for producing cement clinker by using carbide slag and limestone as raw materials, belonging to the technical field of resources and environment. The method uses the carbide slag as the calcareous raw materials, and the cement clinker is calcined by using a novel dry technology, which is characterized in that: either 100 percent of carbide slag or 100 percent of limestone can be used as the calcareous raw materials, or the carbide slag and the limestone can be mixed at any ratio for use. A main process comprises the following steps of: (1) kiln rear feeding, in which a preheater can be switched between the stage 3 and the stage 5 through changing a position of a material feeding point; (2) raw material pre-decomposition, in which a five-stage preheater which is switchable to a three-stage preheater and an enhanced suspension spray type decomposition furnace are used in order to combust the fuels and decompose the raw materials, wherein the outlet temperature of the decomposition furnace is controlled between 700 and 890 DEG C; and (3) rotary kiln calcining, in which the decomposed raw materials enter the kiln to be calcined into the cement clinker. The method has the characteristics of high resource regeneration level of the carbide slag, obvious energy-saving and emission-reduction effect, strong system compatibility and the like.
Description
Technical field
The present invention relates to a kind of unrestricted compatible carbide slag and lime masonry raw material for producing cement chamotte method, belong to the resource and environment technical field, specifically be a kind of unrestricted compatible carbide slag and lime masonry calcareous raw material, adopt the new dry process technology to produce the method for cement clinker.
Background technology
The calcium carbide route acetylene unit is widely applied in China, has produced a large amount of waste residue (carbide slag) in this process, and the main component in the carbide slag is Ca (OH)
2, it can produce severe contamination to environment, and is difficult to handle.But utilizing carbide slag to produce cement clinker as calcareous raw material replace lime matter mineral then is a good approach, not only can decontamination, can also save the Wingdale mineral, reduce the manufacture of cement cost, reach utilization of waste as resource, put into practice the target of recycling economy.
The new dry process production technology has become the choice of technology of carbide slag system cement at present, but some problems have appearred in concrete practice, mainly show three aspects: one, the decomposition temperature difference of carbide slag and Wingdale is the people very, causes the flue-gas temperature control of decomposing furnace outlet different; Its two, the thermal capacitance difference of carbide slag and Wingdale is bigger, causes in the warm of raw material, needed step heat exchange number of times is different, the preheater configuration when promptly utilizing carbide slag and utilizing Wingdale to produce is different; They are three years old, because the supporting and asynchronous factor of the scale of Chemical Manufacture enterprise and cement production enterprise exists, there is unstable in the source of carbide slag, so will make cement production system keep stable cement production device compatible carbide slag of energy and the Wingdale of just requiring as calcareous raw material.And present cement production device compatibility is relatively poor, and technico-economical comparison is not advanced, and also there is defective in technical scheme, needs further deeply to improve.
Summary of the invention
The invention solves new dry process carbide slag system cement technology and present new dry process technology and can't compatible calcareous raw material use the difficult problem of carbide slag and Wingdale, a kind of new carbide slag system method for production of cement is provided, and calcareous raw material can use Wingdale and both to use with the arbitrary proportion collocation by compatible 100% use carbide slag and 100%.The invention provides a kind of preheating precalcining system of formula decomposing furnace of spurting that adopts five-stage cyclone preheater to join strengthen to suspend, be provided with the multiple spot drawing-in device simultaneously, pre-heating system can be switched between Pyatyi and three grades.This method has taken into full account the physics and the chemical qualitative difference of carbide slag and Wingdale, and combines present advanced person's preheating using predecomposition technology.Realized new dry process carbide slag system cement producing line also can compatible Wingdale as the breakthrough of calcareous raw material, guaranteed the compatibility and the operation factor of system.
Principle of work of the present invention, predecomposition device have taken into full account the physicochemical property difference of carbide slag and Wingdale, and the main difference of carbide slag and Wingdale is that the decomposition temperature of (1) carbide slag is 560 ℃, and the decomposition temperature of Wingdale is 890 ℃; (2) three grades of preheaters of higher needs of the thermal capacitance of carbide slag just can satisfy preheat requirements, and the preheating of Wingdale then needs the Pyatyi preheater just can meet the demands.The major function of decomposing furnace is the perfect combustion of fuel and the abundant decomposition of raw material, promptly needs to take into account the combustioncharacteristics of fuel and the resolution characteristic of raw material.The formula decomposing furnace that spurts of strengthen suspending promptly can satisfy above-mentioned requirements, and fuel is in whirlpool decomposition chamber internal combustion, and material is distributed in the limit wall of whirlpool decomposition chamber, can not bring negative impact to fuel combustion, in mixing section, raw material decompose, fuel burns away, and finishes the task that fuel combustion and raw material decompose.When utilizing Wingdale as calcareous raw material, the predecomposition device switches to five-stage cyclone preheater and joins the formula decomposing furnace that spurts that strengthen to suspend, and the temperature out of decomposing furnace is controlled at 850～890 ℃; When utilizing carbide slag to make calcareous raw material, the predecomposition device switches to three grades of cyclone preheaters and joins the formula decomposing furnace that spurts that strengthen to suspend, decomposing furnace is divided between two functional zone, first interval is the abundant combustion zone of fuel, its major function is to finish the perfect combustion of fuel, second interval is the cooling high-temperature fume district, reduces the temperature that decomposing furnace exports flue gas by the heat that absorbs high-temperature flue gas at these interval feeding raw material, reduces the flue-gas temperature that enters pre-heating system.The temperature out of decomposing furnace is controlled at 700～800 ℃.
The technical solution used in the present invention:
New dry process carbide slag system cement technology, compatible carbide slag of calcareous raw material and Wingdale simultaneously.Be characterized in that calcareous raw material utilizes carbide slag fully, the condition in the carbide slag shortage also can adopt Wingdale simultaneously, and technological process comprises:
(1) kiln tail feeding
Kiln tail feeding is divided into two-way, the airduct between one tunnel feeding one-level tube and the secondary tube, and the airduct between three grades of tubes of one tunnel feeding and the level Four tube by changing the position of feeding point, is realized the switching of pre-heating system between three grades of preheaters and Pyatyi preheater.
(2) raw material preheating predecomposition
When adopting carbide slag to be calcareous raw material, precalcining system switches to three grades of cyclone preheaters and joins the formula decomposing furnace that spurts that strengthen to suspend, raw material are divided into two portions and enter decomposing furnace, a part enters decomposing furnace whirlpool decomposition chamber, a part enters the middle part of decomposing furnace mixing section, and the decomposing furnace temperature out is controlled at 700～800 ℃.
When adopting Wingdale to be calcareous raw material, precalcining system switches to five-stage cyclone preheater joins and strengthens the formula decomposing furnace that spurts that suspends, and raw material all enter decomposing furnace whirlpool decomposition chamber, and the decomposing furnace temperature out is controlled at 850～890 ℃.
When adopting Wingdale and carbide slag jointly as calcareous raw material, raw material are divided into two-way feeding preheater, i.e. airduct between one tunnel feeding one-level tube and the secondary tube, the airduct between three grades of tubes of one tunnel feeding and the level Four tube, the allocation proportion of 2 feeding points is regulated according to the content of carbide slag in the raw material.
The each point temperature controlling mainly by the control of sub-material adjusting and fuel quantity, satisfies the requirement of different situations in the system.
(3) coal dust firing and raw material decompose
Fuel is by in the fuel nozzle feeding decomposing furnace settling chamber, simultaneously in the raw material feeding decomposing furnace whirlpool decomposition chamber that gets off from higher level's preheater, the adherent distribution protection of raw material furnace wall in the whirlpool decomposition chamber, in be formed centrally high temperature combustion zone, fuel carries out overheavy firing.
When adopting carbide slag as calcareous raw material preparation raw material, the raw material separated into two parts enters decomposing furnace, a part enters the whirlpool combustion chamber of decomposing furnace, the middle part of part feeding decomposing furnace mixing section, absorb the heat of high-temperature flue gas, raw material are finished decomposition, control the decomposing furnace temperature out simultaneously at 700～800 ℃.
When adopting Wingdale as calcareous raw material preparation raw material, raw material all enter the whirlpool combustion chamber of decomposing furnace, control the decomposing furnace temperature out simultaneously at 850～890 ℃.
(4) calcined by rotary kiln
Enter calcined by rotary kiln through the raw material after the preheating predecomposition and become cement clinker.
The accessible effect of the technology of the present invention:
1. made full use of the waste residue of calcium carbide route acetylene technology discharging, solved the difficult problem of generated by polyvinyl chloride by calcium carbide manufacturing enterprise waste residue stacking contaminate environment, realized the recycling of carbide slag simultaneously, saved and produced cement clinker Wingdale mineral commonly used, save a large amount of natural resourcess, realized comprehensive utilization, the purpose of developing a circular economy.
2. carbide slag can replacing whole limestone as calcareous raw material, and relatively, can reduce CO with the manufacture of cement of lime masonry raw material
2Discharging 0.51kg/kg.cl does not comprise that wherein fuel consumption reduces the CO that causes
2The discharging reduction; And, can reduce the consumption of fuel owing to burn till the reduction of hear rate, and reduced production cost, realized the target of energy-saving and emission-reduction simultaneously.
3. precalcining system is compatible strong, can adapt to the variation of material condition, when the short supply of carbide slag, can use Wingdale to replenish to guarantee the normal operation of production line.
When 4. the native system calcareous raw material utilized carbide slag, the operation factor of system and throughput were consistent with present new type nonaqueous cement production line index.
Description of drawings
Fig. 1 is a system flowchart of the present invention.
Among the figure: 1 cyclone preheater, 2 rotary feeders, 3 T-valve, 4 cyclone preheaters, 5 cyclone preheaters, 6 material distributing valves, 7 cyclone preheaters, 8 cyclone preheaters, 9 decomposing furnaces, 10 rotary kilns.
Embodiment
For further understanding content of the present invention and characteristics, conjunction with figs. is described in detail as follows now:
Embodiment 1
With reference to accompanying drawing 1
New dry process carbide slag system cement technology, compatible Wingdale is a calcareous raw material simultaneously, its working process comprises:
(1) kiln tail feeding
Kiln tail raw material at first enter T-valve 3 then by rotary feeder 2, and T-valve connects the two-way inlet pipe: the airduct between one tunnel feeding cyclone preheater 1 and the cyclone preheater 4; Airduct between one tunnel feeding cyclone preheater 5 and the cyclone preheater 7.Be provided with material distributing valve 6 in the inlet pipe under the cyclone preheater 5, material is divided into two portions, a part enters the airduct between cyclone preheater 7 and the cyclone preheater 8, and a part enters the middle part of decomposing furnace 9 mixing sections.When utilizing Wingdale for calcareous raw material, raw material are by the airduct between T-valve 3 back feeding cyclone preheaters 1 and the cyclone preheater 4, and when utilizing carbide slag for calcareous raw material, raw material are by the airduct between T-valve 3 back feeding cyclone preheaters 5 and the cyclone preheater 7.
(2) raw material preheating predecomposition
When utilizing carbide slag for calcareous raw material, the airduct between raw material feeding cyclone preheater 5 and the cyclone preheater 7 is opened the bypass that material distributing valve 6 enters decomposing furnace simultaneously.Precalcining system forms 3 grades of cyclone preheaters joins and strengthens the formula decomposing furnace that spurts that suspends, and raw material are finished preheating predecomposition in precalcining system, and the temperature out of decomposing furnace is controlled at 700～800 ℃.
When utilizing Wingdale for calcareous raw material, the airduct between raw material feeding cyclone preheater 1 and the cyclone preheater 4 is closed the bypass that material distributing valve 6 enters decomposing furnace.Precalcining system forms 5 grades of cyclone preheaters joins and strengthens the formula decomposing furnace that spurts that suspends, and raw material are finished preheating predecomposition in precalcining system, and the temperature out of decomposing furnace 9 is controlled at 850～890 ℃.
When adopting Wingdale and carbide slag jointly as calcareous raw material, raw material are divided into two-way feeding preheater, i.e. airduct between one tunnel feeding cyclone preheater 1 and the cyclone preheater 4, airduct between one tunnel feeding cyclone preheater 5 and the cyclone preheater 7, the feeding allocation proportion that two feedings are selected is regulated according to the content of carbide slag in the raw material.
(3) coal dust firing and raw material decompose
Coal dust is by coal burner feeding decomposing furnace 9 settling chambers; burning rapidly under the effect of tertiary air; raw material are from level Four tube 7 tremie pipes feeding decomposing furnace whirlpool combustion chamber; pasting the motion of decomposing furnace 9 whirlpool combustion chamber wall surface; the protection wall is not ablated by pyritous, and simultaneously raw material partly decompose, enter the decomposing furnace mixing section after; fuel and raw material thorough mixing are further finished the burning of fuel and the decomposition of raw material.
When utilizing carbide slag as calcareous raw material preparation raw material, the raw material separated into two parts enters decomposing furnace, a part enters the whirlpool combustion chamber of decomposing furnace 9 with level Four tube 7 tremie pipes, a part is by the middle part of material distributing valve 6 back feeding decomposing furnaces 9 mixing sections, absorb the heat of high-temperature flue gas, raw material are finished decomposition, and the decomposing furnace temperature out is controlled at 700～800 ℃; When utilizing Wingdale as calcareous raw material preparation raw material, raw material all enter the whirlpool combustion chamber of decomposing furnace 9, control the decomposing furnace temperature out simultaneously at 850～890 ℃.
(4) calcined by rotary kiln grog
Enter rotary kiln 10 system's calcination of cement clinker through the raw material after the preheating predecomposition.
Claims (6)
1. unrestricted compatible carbide slag and lime masonry raw material for producing cement chamotte method, utilize carbide slag and lime masonry calcareous raw material, adopt the new dry process technology to produce cement clinker, it is characterized in that: calcareous raw material can adopt carbide slag fully, also can adopt Wingdale fully, also the Wingdale and the carbide slag collocation of arbitrary proportion can be done the calcareous raw material use under the situation of carbide slag quantity not sufficient, technological process comprises:
(1) kiln tail feeding
Kiln tail feeding is divided into two-way by the control of threeway material distributing valve, airduct between one tunnel feeding first step preheater and the second stage preheater, airduct between one tunnel feeding third stage preheater and the fourth stage preheater, by changing the position of feeding point, be implemented between three grades of preheaters and the Pyatyi preheater and switch.
(2) raw material preheating predecomposition
When adopting carbide slag to be calcareous raw material fully, precalcining system switches to three grades of cyclone preheaters and joins the formula decomposing furnace that spurts that strengthen to suspend, raw material are divided into two portions and enter decomposing furnace, a part enters decomposing furnace whirlpool decomposition chamber, a part enters the middle part of decomposing furnace mixing section, and the decomposing furnace temperature out is controlled at 700～800 ℃.When adopting Wingdale to be calcareous raw material fully, precalcining system switches to five-stage cyclone preheater and joins the formula decomposing furnace that spurts that strengthen to suspend, and raw material all enter decomposing furnace whirlpool decomposition chamber, and the decomposing furnace temperature out is controlled at 850～890 ℃.The each point temperature controlling mainly is by the control of sub-material adjusting and fuel quantity in the system, satisfies the requirement of different situations.
(3) fuel combustion and raw material decompose
Fuel is by in the fuel nozzle feeding decomposing furnace settling chamber, simultaneously in the raw material feeding decomposing furnace whirlpool decomposition chamber that gets off from higher level's preheater, the adherent distribution of raw material in the whirlpool decomposition chamber, in be formed centrally high temperature combustion zone, fuel carries out overheavy firing.
When adopting carbide slag as calcareous raw material, the raw material separated into two parts enters decomposing furnace, and a part enters the whirlpool combustion chamber of decomposing furnace, the middle part of part feeding decomposing furnace mixing section, absorb the heat of high-temperature flue gas, raw material are finished decomposition, control the decomposing furnace temperature out simultaneously at 700～800 ℃; When adopting Wingdale as calcareous raw material, raw material all enter the whirlpool combustion chamber of decomposing furnace, control the decomposing furnace temperature out simultaneously at 850～890 ℃.
(4) calcined by rotary kiln
Enter calcined by rotary kiln through the raw material after the preheating predecomposition and become cement clinker.
2. method according to claim 1 is characterized in that, calcareous raw material can utilize carbide slag or Wingdale fully, also carbide slag and Wingdale can be made calcareous raw material with any than collocation.
3. method according to claim 1 is characterized in that, decomposing furnace is divided into two functional zone, comprises fuel overheavy firing district and cooling high-temperature fume district, and the temperature that exports by this design decomposing furnace can be controlled at 700～890 ℃ as required
4. method according to claim 1 is characterized in that, the preheating precalcining system can switch between Pyatyi pre-heating system and three grades of pre-heating systems.
5. method according to claim 4 is characterized in that, precalcining system adopted three grades of cyclone preheaters to join to strengthen the formula decomposing furnace that spurts that suspends when calcareous raw material utilized carbide slag fully.
6. method according to claim 1 is characterized in that, three grades of cyclone preheater outlets are provided with material distributing valve, and one material directly feeds the middle part of decomposing furnace mixing section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010197052A CN102260052B (en) | 2010-05-30 | 2010-05-30 | Unlimited compatible method for producing cement clinker by using carbide slag and limestone as raw material |
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| CN201010197052A CN102260052B (en) | 2010-05-30 | 2010-05-30 | Unlimited compatible method for producing cement clinker by using carbide slag and limestone as raw material |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105585263A (en) * | 2015-12-23 | 2016-05-18 | 中国建筑材料科学研究总院 | Preparation method of cement clinker |
| CN108862349A (en) * | 2017-05-11 | 2018-11-23 | 奇台县循环钙业发展有限公司 | A kind of cement produced with the dry method pre-heating system suspension combustion carbide slag reduction-oxidation calcium device |
| CN110642279A (en) * | 2018-06-26 | 2020-01-03 | 尧柏特种水泥技术研发有限公司 | Production method of calcium aluminate for high-performance water treatment agent |
| CN114562875A (en) * | 2022-01-24 | 2022-05-31 | 华新水泥股份有限公司 | Three-spraying double-rotary-cutting gradient combustion low-carbon low-nitrogen environment-friendly decomposing furnace for cement production |
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| US4533396A (en) * | 1982-12-27 | 1985-08-06 | Klockner-Humboldt-Deutz Ag | Method for the thermal treatment of mineral raw materials |
| CN101182142A (en) * | 2007-12-03 | 2008-05-21 | 天津水泥工业设计研究院有限公司 | Method for calcining cement by carbide slag replacing whole limestone |
| CN101475324A (en) * | 2009-01-31 | 2009-07-08 | 合肥水泥研究设计院 | Technological process for producing cement clinker by dry burning carbide slag |
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2010
- 2010-05-30 CN CN201010197052A patent/CN102260052B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4533396A (en) * | 1982-12-27 | 1985-08-06 | Klockner-Humboldt-Deutz Ag | Method for the thermal treatment of mineral raw materials |
| CN101182142A (en) * | 2007-12-03 | 2008-05-21 | 天津水泥工业设计研究院有限公司 | Method for calcining cement by carbide slag replacing whole limestone |
| CN101475324A (en) * | 2009-01-31 | 2009-07-08 | 合肥水泥研究设计院 | Technological process for producing cement clinker by dry burning carbide slag |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105585263A (en) * | 2015-12-23 | 2016-05-18 | 中国建筑材料科学研究总院 | Preparation method of cement clinker |
| CN105585263B (en) * | 2015-12-23 | 2018-01-16 | 中国建筑材料科学研究总院 | The preparation method of clinker |
| CN108862349A (en) * | 2017-05-11 | 2018-11-23 | 奇台县循环钙业发展有限公司 | A kind of cement produced with the dry method pre-heating system suspension combustion carbide slag reduction-oxidation calcium device |
| CN110642279A (en) * | 2018-06-26 | 2020-01-03 | 尧柏特种水泥技术研发有限公司 | Production method of calcium aluminate for high-performance water treatment agent |
| CN114562875A (en) * | 2022-01-24 | 2022-05-31 | 华新水泥股份有限公司 | Three-spraying double-rotary-cutting gradient combustion low-carbon low-nitrogen environment-friendly decomposing furnace for cement production |
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