CN109206031A - A kind of efficient bleaching process of white cement clinker - Google Patents
A kind of efficient bleaching process of white cement clinker Download PDFInfo
- Publication number
- CN109206031A CN109206031A CN201811281297.8A CN201811281297A CN109206031A CN 109206031 A CN109206031 A CN 109206031A CN 201811281297 A CN201811281297 A CN 201811281297A CN 109206031 A CN109206031 A CN 109206031A
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- China
- Prior art keywords
- air
- grate
- white cement
- cement clinker
- clinker
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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
- C04B7/48—Clinker treatment
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of efficient bleaching process of white cement clinker, the efficient bleaching process of the white cement clinker includes the following steps: rotary kiln high temperature calcining white cement clinker, and is discharged into grate-cooler and is cooled down from the discharge end of rotary kiln；It after the clinker of high temperature enters grate-cooler, drops down onto the first grate and is cooled down, clinker is quenched by providing mixed liquid nitrogen and air in the first grate, clinker is cooled to 600 DEG C~800 DEG C；Subsequent clinker drops down onto the second grate and is cooled down, and is carried out completely by air in the second grate air-cooled, and grate-cooler is discharged after clinker is cooled to 80 DEG C~100 DEG C；The object of the present invention is to provide a kind of efficient bleaching process of white cement clinker, with solve the problems, such as white cement clinker calcining need to consume more heat consumptions, whiteness improve it is limited.
Description
Technical field
The invention belongs to white cement production fields, and in particular to a kind of efficient bleaching process of white cement clinker.
Background technique
It needs just to can guarantee that clinker has good object by air-cooled sharply cooling after Portland clinker high temperature firing
Mechanical property is managed, and white portland cement will usually spray water (or water drenching or immersion) chilling to increase vitreum to improve clinker
Whiteness (is bleached).Compared with calcined by rotary kiln portland cement clinker, calcined by rotary kiln white cement clinker makes ripe because water is cooling
The heat that material carries becomes water vapour and slatterns, since the Secondary Air and tertiary air of calcining cannot be provided for rotary kiln, with
More heat consumptions need to be consumed as white cement clinker calcining, and low output, at high cost；And by way of air-cooled or water cooling
To the bleaching limitation of clinker, it is unable to satisfy higher and higher whiteness requirement.
Summary of the invention
The object of the present invention is to provide a kind of efficient bleaching process of white cement clinker, are needed with solving white cement clinker calcining
Consume more heat consumptions, whiteness improves limited problem.
The technical solution provided by the present invention is: a kind of efficient bleaching process of white cement clinker, the white cement clinker
Efficient bleaching process include the following steps:
S1: rotary kiln high temperature calcining white cement clinker, and be discharged into grate-cooler and cooled down from the discharge end of rotary kiln；
S2: it after the clinker of high temperature enters grate-cooler, drops down onto the first grate and is cooled down, offer is provided in the first grate
Mixed liquid nitrogen and air is quenched clinker, and clinker is cooled to 600 DEG C~800 DEG C；
S3: subsequent clinker drops down onto the second grate and is cooled down, carried out completely by air in the second grate it is air-cooled,
Grate-cooler is discharged after clinker is cooled to 80 DEG C~100 DEG C.
Preferably, the liquid nitrogen in the step 2 connects pressure reducing valve by liquid nitrogen container and provides, and the pressure reducing valve, which is also connected with, to be stretched
Enter the first indoor first jet pipe of the first wind of grate bottom, liquid nitrogen sprays into the first wind from the nozzle on the first jet pipe by pressure reducing valve
Room.
Preferably, the air in the step 2 is provided by air blower, and the air outlet of the air blower is connected to by air hose
The second jet pipe inside first the first air compartment of grate bottom, air are blown out from air blower, blast the first air compartment by air hose.
Preferably, the amount of liquid nitrogen of the penetrating in the first air compartment is realized by the quantity of control liquid nitrogen nozzle unlatching, is made
Obtaining the mass ratio of liquid nitrogen and air in the first grate is 1:9~3:7, realizes and carries out suddenly to the Cement Clinker in the first grate
It is cold.
Preferably, the air in the step 3 is provided by air blower, and the air outlet of the air blower is connected to by air hose
Second the second air compartment of grate bottom, air are blown out from air blower, blast the second air compartment by air hose.
Preferably, complete to the cooling high-temperature gas generated of white cement clinker by liquid nitrogen and air mixing in the step 2
Portion imports in rotary kiln and provides heat.
Preferably, it cools down in the step 2 and is generated with liquid nitrogen by deep cooling
Preferably, the end of first grate is provided with breaker roll, and the front end of second grate is set to described broken
Below broken roller.
The utility model has the advantages that
The present invention is quenched the clinker of high temperature by being mixed with the air of liquid nitrogen in the first grate of grate-cooler, so that
The temperature fall off rate of clinker is accelerated, to effectively raise the whiteness of cement；And the mass ratio control of liquid nitrogen and air
It is made as 1:9~3:7, the high-temperature residual heat gas that a small amount of nitrogen is mixed with after cooling down is passed through in rotary kiln and recycles heat, phase
Than in the prior art, spray water extraction is cold and causing waste heat to contain water vapour can not recycle when air-cooled, the present invention both accelerates cooling
Rate improves whiteness, and can be by heat recovery；The liquid nitrogen that cooling liquid nitrogen is generated from deep cooling simultaneously,
Wherein oxygen provides cement kiln and carries out oxygen-enriched combusting, and byproduct liquid nitrogen is remarkably improved equipment use as clinker cooling medium
Efficiency reduces production cost.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
In figure: 1- rotary kiln, 2- grate-cooler, the first grate of 3-, the second grate of 4-, the first jet pipe of 5-, 6- air blower, 7- wind
Pipe, 8- breaker roll.
Specific embodiment
Embodiments of the present invention will be further described below with reference to the accompanying drawings.
As shown in Figure 1, the efficient bleaching process of one of the present embodiment white cement clinker, the height of the white cement clinker
Imitating bleaching process includes the following steps:
S1: 1 high temperature calcining white cement clinker of rotary kiln, and be discharged into grate-cooler 2 from the discharge end of rotary kiln 1 carry out it is cold
But；
S2: it after the clinker of high temperature enters grate-cooler 2, drops down onto the first grate 3 and is cooled down, passed through in the first grate 3
It provides mixed liquid nitrogen and air to be quenched clinker, clinker is cooled to 600 DEG C~800 DEG C；
S3: subsequent clinker drops down onto the second grate 4 and is cooled down, and carries out wind by air completely in the second grate 4
It is cold, grate-cooler 2 is discharged after clinker is cooled to 80 DEG C~100 DEG C.
In the present embodiment, the liquid nitrogen in the step 2 connects pressure reducing valve by liquid nitrogen container and provides, and the pressure reducing valve is also connected with
3 indoor first jet pipe 5 of the first wind of bottom of the first grate is protruded into, liquid nitrogen is sprayed by pressure reducing valve from the nozzle on the first jet pipe 5
Enter the first air compartment；Air in the step 2 is provided by air blower 6, and the air outlet of the air blower 6 is connected to by air hose 7
First grate, 3 the first air compartment of bottom, air are blown out from air blower 6, blast the first air compartment by air hose 7；In the first air compartment
The amount of liquid nitrogen of penetrating realized by the quantity that control liquid nitrogen nozzle is opened so that in the first grate liquid nitrogen and air quality
Than for 1:9~3:7, realization is quenched the Cement Clinker in the first grate.
Air in the step 3 is provided by air blower 6, and the air outlet of the air blower 6 passes through the connection of air hose 7 second
4 the second air compartment of bottom of grate, air are blown out from air blower 6, blast the second air compartment by air hose 7.
The cooling high-temperature gas generated of white cement clinker is all imported back by liquid nitrogen and air mixing in the step 2
Heat is provided in rotary kiln 1.
It cools down in the step 2 and is generated with liquid nitrogen by deep cooling, wherein oxygen provides cement kiln and carries out oxygen-enriched combustion
It burns, byproduct liquid nitrogen is remarkably improved equipment service efficiency as clinker cooling medium, reduces production cost.
The end of first grate 3 is provided with breaker roll 8, and the front end of second grate 4 is set to the breaker roll 8
Lower section.
Specific embodiments of the present invention are described in detail above, but it is merely an example, the present invention is simultaneously unlimited
It is formed on above description specific embodiment.To those skilled in the art, the equivalent modifications and replace that any couple of present invention carries out
In generation, is also all among scope of the invention.Therefore, without departing from the spirit and scope of the invention made by equal transformation and repair
Change, all covers within the scope of the present invention.
Claims (8)
1. a kind of efficient bleaching process of white cement clinker, which is characterized in that the efficient bleaching process packet of the white cement clinker
Include the following steps:
S1: rotary kiln (1) high temperature calcining white cement clinker, and be discharged into grate-cooler (2) from the discharge end of rotary kiln (1) carry out it is cold
But；
S2: after the clinker of high temperature enters grate-cooler (2), dropping down onto the first grate (3) and cooled down, and leads in the first grate (3)
It crosses offer mixed liquid nitrogen and air to be quenched clinker, clinker is cooled to 600 DEG C~800 DEG C；
S3: subsequent clinker drops down onto the second grate (4) and is cooled down, and carries out wind by air completely in the second grate (4)
It is cold, grate-cooler (2) are discharged after clinker is cooled to 80 DEG C~100 DEG C.
2. a kind of efficient bleaching process of white cement clinker according to claim 1, it is characterised in that:
Liquid nitrogen in the step 2 connects pressure reducing valve by liquid nitrogen container and provides, and the pressure reducing valve, which is also connected with, protrudes into the first grate
(3) indoor first jet pipe (5) of the first wind of bottom, liquid nitrogen spray into the first wind from the nozzle on the first jet pipe (5) by pressure reducing valve
Room.
3. a kind of efficient bleaching process of white cement clinker according to claim 2, it is characterised in that:
Air in the step 2 is provided by air blower (6), and the air outlet of the air blower (6) passes through air hose (7) connection the
The first air compartment of one grate (3) bottom, air blowout from air blower (6), blasts the first air compartment by air hose (7).
4. a kind of efficient bleaching process of white cement clinker according to claim 3, it is characterised in that:
The amount of liquid nitrogen of penetrating in the first air compartment is realized by the quantity that control liquid nitrogen nozzle is opened, so that in the first grate
The mass ratio of liquid nitrogen and air is 1:9~3:7, and realization is quenched the Cement Clinker in the first grate.
5. according to claim 1 or a kind of efficient bleaching process of white cement clinker, feature described in 3 any one exist
In:
Air in the step 3 is provided by air blower (6), and the air outlet of the air blower (6) passes through air hose (7) connection the
The second air compartment of two grates (4) bottom, air blowout from air blower (6), blasts the second air compartment by air hose (7).
6. a kind of efficient bleaching process of white cement clinker according to claim 1, it is characterised in that:
Rotary kiln is all imported to the cooling high-temperature gas generated of white cement clinker by liquid nitrogen and air mixing in the step 2
(1) heat is provided in.
7. a kind of efficient bleaching process of white cement clinker according to claim 1, it is characterised in that:
It cools down in the step 2 and is generated with liquid nitrogen by deep cooling.
8. a kind of efficient bleaching process of white cement clinker according to claim 1, it is characterised in that:
The end of first grate (3) is provided with breaker roll (8), and the front end of second grate (4) is set to described broken
Below roller (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811281297.8A CN109206031A (en) | 2018-10-31 | 2018-10-31 | A kind of efficient bleaching process of white cement clinker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811281297.8A CN109206031A (en) | 2018-10-31 | 2018-10-31 | A kind of efficient bleaching process of white cement clinker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109206031A true CN109206031A (en) | 2019-01-15 |
Family
ID=64998178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811281297.8A Pending CN109206031A (en) | 2018-10-31 | 2018-10-31 | A kind of efficient bleaching process of white cement clinker |
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| Country | Link |
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| CN (1) | CN109206031A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1017958A1 (en) * | 1997-07-30 | 2000-07-12 | Southdown, Inc. | Oxygen enrichment of cement kiln system combustion |
| 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 |
| CN105258385A (en) * | 2014-07-16 | 2016-01-20 | 钟伟昌 | Cooling and heating machine and applications thereof |
| CN108534561A (en) * | 2018-07-19 | 2018-09-14 | 江西银杉白水泥有限公司 | Integral type white cement clinker cools down equipment |
-
2018
- 2018-10-31 CN CN201811281297.8A patent/CN109206031A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1017958A1 (en) * | 1997-07-30 | 2000-07-12 | Southdown, Inc. | Oxygen enrichment of cement kiln system combustion |
| 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 |
| CN105258385A (en) * | 2014-07-16 | 2016-01-20 | 钟伟昌 | Cooling and heating machine and applications thereof |
| CN108534561A (en) * | 2018-07-19 | 2018-09-14 | 江西银杉白水泥有限公司 | Integral type white cement clinker cools down equipment |
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Application publication date: 20190115 |
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