CN101570405B - Method for removing formed ring of rotary kiln under high temperature by using forsterite and sodium silicate - Google Patents
Method for removing formed ring of rotary kiln under high temperature by using forsterite and sodium silicate Download PDFInfo
- Publication number
- CN101570405B CN101570405B CN2009100624589A CN200910062458A CN101570405B CN 101570405 B CN101570405 B CN 101570405B CN 2009100624589 A CN2009100624589 A CN 2009100624589A CN 200910062458 A CN200910062458 A CN 200910062458A CN 101570405 B CN101570405 B CN 101570405B
- Authority
- CN
- China
- Prior art keywords
- rotary kiln
- kiln
- forsterite
- sodium silicate
- ring formation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Muffle Furnaces And Rotary Kilns (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Glass Compositions (AREA)
Abstract
The invention relates to a method for removing formed ring of a rotary kiln under high temperature by using forsterite and sodium silicate. The invention adopts the technical scheme that the method comprises the following steps: mixing 5 to 15 percent of forsterite ore powder, 5 to 15 percent of sodium silicate powder and 70 to 90 percent of coal powder in percentage by weight, and stirring the mixed powder for 10 to 30 minutes; and then, burning the mixed powder at a ring formation part of the rotary kiln directly through a nozzle at the burning temperature between 1,300 and 1,600 DEG C till the formed ring of the rotary kiln is softened to collapse, and discharging the formed ring outside the kiln along with the rotation of the rotary kiln so as to keep the normal production of the rotary kiln. The fuel adopted by the method is coal powder used by a rotary kiln device, the raw material sources of the forsterite and the sodium silicate are wide, and the resources are rich. The method can ensure the normal production of the rotary kiln, does not need to stop the kiln to manually remove the formed ring, can effectively solve the universal problem of ring formation when the rotary kiln uses the coal powder as the fuel, and has low cost.
Description
Technical field
The invention belongs to the method for removing ring formation of rotary kiln under the high temperature, relate in particular to a kind of with removing the ring formation of rotary kiln method under forsterite and the water glass high temperature.
Background technology
In the rotary kiln rotary course, though the bed of material directly contacts with kiln lining, various components stick on the kiln lining inevitable often in the kiln material, but because lacking, the kiln inner wall surface of " totally " adheres to the basis in the initial stage, fine particle and the dust in flue gas of having only light specific gravity, at first be attached on the refractory lining of kiln wall, the adhesion of this fines mainly is through mechanical deposit, forms through chemical bonding on a small quantity.
When rotary kiln normally moves, when the gentle grog rate of kiln was stablized, kliner coating can constantly stick and come off voluntarily, to protect stable kliner coating thickness.Unbalance in case (or melt content is too much or the kiln temperature is higher or fuel ash is big), the kliner coating change of properties, the grog particles no longer of a large amount of kliner coating parcels drops along moving on the kiln wall that is rotating then, but very firmly and constantly adheres to the kiln wall, finally forms ring formation.
Ring formation generally is meant the ring formation of clinkering zone and thermopositive reaction band intersection in the rotary kiln, the reason more complicated of ring formation, and the coefficient result of multiple often factor, but the formation mechanism of ring formation thing is now reached common understanding.The ring formation thing is actually one deck " kliner coating " that clinkering zone and thermopositive reaction band intersection hang up, and when " kliner coating " when tying certain thickness, has just formed circle.And kliner coating mainly by low melting point bonding mutually and the degradation production of Wingdale and the residual completely ore particle of unreacted and coal dust accumulation form.
After ring formation occurs, the one, influence kiln ventilation, the rising of CO concentration in flue gas can be quickened the growth of ring formation; The 2nd, different because of the thickness distribution of ring formation on circumference, the material that causes scurrying ring formation in kiln rotates is suddenly big or suddenly small, also influences clinker quality when influence the temperature of kiln head variation; The 3rd, the high-temperature material that sealing place of kiln tail spills not only causes the damage of sealing element, and the person or automatically controlled instrument and circuit are also worked the mischief; The 4th, in case when ring formation occurring local shedding being arranged, living phenomenon can appear running in kiln hood, the person or cooling machine and kiln hood dust-precipitator are all caused certain harm.
The method of handling ring formation in the rotary kiln now has the empty burning method of fracture, the method that colds and heat succeed each other, kiln to bombard striking etc., but effect is undesirable, can not effectively remove ring formation.Only stop kiln and manually remove, influence ordinary production.
Summary of the invention
Task of the present invention provide that a kind of cost is low, technology is simple, efficient is high and do not influence ordinary production with removing the ring formation of rotary kiln method under forsterite and the water glass high temperature.
For realizing above-mentioned task, the technical solution adopted in the present invention is: earlier the forsterite breeze of 5～15wt%, the sodium silicate of 5～15wt% and the coal dust of 70～90wt% are mixed, stirred 10～30 minutes; Then with above-mentioned compound powder directly by nozzle in the burning of the ring formation position of rotary kiln, temperature of combustion is 1300～1600 ℃, caves in until the ring formation of rotary kiln is softening, along with the rotation of rotary kiln expels from kiln, keeps the ordinary production of rotary kiln.
Wherein: MgO content 〉=38% of forsterite breeze, granularity are 0.2～0mm; Sodium silicate content 〉=50%, granularity are 0.1～0mm; C content 〉=80% of coal dust, granularity are 0.1～0mm.
Owing to adopt technique scheme, fuel of the present invention is the coal dust that rotary kiln itself uses, and forsterite breeze and sodium silicate raw material be wide material sources, aboundresources also, thereby production cost is low.During use, take forsterite breeze, sodium silicate and coal dust directly to mix, after the rotary kiln internal-combustion, form low melting point with kliner coating, reduce bonding force between kliner coating and the kiln lining, make kliner coating separate with kiln lining, the circle of knot will soften and the destruction of caving in gradually, kliner coating has kept the ordinary production of rotary kiln along with the rotation of rotary kiln expels from kiln.In addition, because kliner coating contains MgO, the Na in calcium oxide, forsterite and the sodium silicate
2O, SiO
2And Fe
2O
3Low melting point phase Deng the reaction generation, in operating process, be very easy to observe and red-tape operati, and because the kiln lining material contains MgO, chemical erosion is little between low melting point of producing and the furnace lining, therefore can effectively prevent the erosion to the furnace lining material of rotary kiln of forsterite breeze, sodium silicate.
The present invention not only can guarantee the ordinary production of rotary kiln, do not need to stop kiln and manually remove spinned circle, and can be fast, common problem convenient and ring formation when solving rotary kiln effectively and using coal dust to act as a fuel, so have the advantages that cost is low, technology is simple, efficient is high and do not influence ordinary production.
Embodiment
The present invention will be further described below in conjunction with embodiment, is not limiting the scope of the invention.
Embodiment 1
A kind of with removing the ring formation of rotary kiln method under forsterite and the water glass high temperature, earlier the forsterite breeze of 5～8wt%, the sodium silicate of 5～10wt% and the coal dust of 85～90wt% are mixed, stirred 10～20 minutes; Then with above-mentioned compound powder directly by nozzle in the burning of the ring formation position of rotary kiln, temperature of combustion is 1300～1400 ℃, caves in until the ring formation of rotary kiln is softening, along with the rotation of rotary kiln expels from kiln, keeps the ordinary production of rotary kiln.
Wherein: MgO content 〉=38% of forsterite breeze, granularity are 0.2～0mm; Water glass content 〉=50%, granularity are C content 〉=80% of 0.1～0mm coal dust, and granularity is 0.1～0mm.
Embodiment 2
A kind of with removing the ring formation of rotary kiln method under forsterite and the water glass high temperature, earlier the forsterite breeze of 8～12wt%, the sodium silicate of 5～8wt% and the coal dust of 80～85wt% are mixed, stirred 10～20 minutes; Then with above-mentioned compound powder directly by nozzle in the burning of the ring formation position of rotary kiln, temperature of combustion is 1400～1500 ℃, caves in until the ring formation of rotary kiln is softening, along with the rotation of rotary kiln expels from kiln, keeps the ordinary production of rotary kiln.
All the other are with embodiment 1.
Embodiment 3
A kind of with removing the ring formation of rotary kiln method under forsterite and the water glass high temperature, earlier the forsterite breeze of 12～15wt%, the sodium silicate of 8～12wt% and the coal dust of 75～80wt% are mixed, stirred 10～20 minutes; Then with above-mentioned compound powder directly by nozzle in the burning of the ring formation position of rotary kiln, temperature of combustion is 1500～1600 ℃, caves in until the ring formation of rotary kiln is softening, expels from kiln along with the rotation of rotary kiln, keeps the ordinary production of rotary kiln.
All the other are with embodiment 1.
Embodiment 4
A kind of with removing the ring formation of rotary kiln method under forsterite and the water glass high temperature, earlier the forsterite breeze of 12～15wt%, the sodium silicate of 12～15wt% and the coal dust of 70～75wt% are mixed, stirred 20～30 minutes; Then with above-mentioned compound powder directly by nozzle in the burning of the ring formation position of rotary kiln, temperature of combustion is 1450～1550 ℃, caves in until the ring formation of rotary kiln is softening, expels from kiln along with the rotation of rotary kiln, keeps the ordinary production of rotary kiln.
All the other are with embodiment 1.
The fuel that present embodiment 1～4 is adopted is the coal dust that rotary kiln itself uses, and the forsterite of employing and water glass raw material raw material be wide material sources, aboundresources also, thereby production cost is low.Take forsterite breeze, sodium silicate and coal dust directly to mix, after the rotary kiln internal-combustion, form low melting point with kliner coating, reduce bonding force between kliner coating and the kiln lining, make kliner coating separate with kiln lining, the circle of knot will soften and the destruction of caving in gradually, and kliner coating expels from kiln along with the rotation of rotary kiln, has kept the ordinary production of rotary kiln.In addition, because kliner coating contains MgO, the Na in calcium oxide, forsterite and the sodium silicate
2O, SiO
2And Fe
2O
3Low melting point phase Deng the reaction generation, in operating process, be very easy to observe and red-tape operati, and because the kiln lining material contains MgO, chemical erosion is little between low melting point of producing and the furnace lining, therefore can effectively prevent the erosion to the furnace lining material of rotary kiln of forsterite breeze, sodium silicate.
This embodiment does not only need to stop kiln and manually removes spinned circle, can guarantee the ordinary production of rotary kiln, and can be fast, common problem convenient and ring formation when solving rotary kiln effectively and using coal dust to act as a fuel, so have the advantages that cost is low, technology is simple, efficient is high and do not influence ordinary production.
Claims (1)
1. remove the ring formation of rotary kiln method under forsterite and the water glass high temperature, it is characterized in that earlier the forsterite breeze of 5～15wt%, the sodium silicate of 5～15wt% and the coal dust of 70～90wt% being mixed, stirred 10～30 minutes; Then with above-mentioned compound powder directly by nozzle in the burning of the ring formation position of rotary kiln, temperature of combustion is 1300～1600 ℃, caves in until the ring formation of rotary kiln is softening, expels from kiln along with rotary kiln rotates;
In technique scheme:
MgO content 〉=38% of forsterite breeze, granularity≤0.2mm;
Sodium silicate content 〉=50%, granularity≤0.1mm;
C content 〉=80% of coal dust, granularity≤0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100624589A CN101570405B (en) | 2009-06-09 | 2009-06-09 | Method for removing formed ring of rotary kiln under high temperature by using forsterite and sodium silicate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100624589A CN101570405B (en) | 2009-06-09 | 2009-06-09 | Method for removing formed ring of rotary kiln under high temperature by using forsterite and sodium silicate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101570405A CN101570405A (en) | 2009-11-04 |
| CN101570405B true CN101570405B (en) | 2011-09-07 |
Family
ID=41229907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100624589A Expired - Fee Related CN101570405B (en) | 2009-06-09 | 2009-06-09 | Method for removing formed ring of rotary kiln under high temperature by using forsterite and sodium silicate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101570405B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102649626B (en) * | 2012-05-15 | 2014-07-23 | 宝山钢铁股份有限公司 | Powdery material cyclic calcining system |
| CN102674716B (en) * | 2012-05-15 | 2013-09-04 | 宝山钢铁股份有限公司 | Cyclic calcining and decomposing process for powdered materials |
| CN114717372B (en) * | 2022-04-26 | 2023-07-21 | 酒泉钢铁(集团)有限责任公司 | High-temperature cleaning method for ring formation of rotary kiln for direct reduction of iron ore |
-
2009
- 2009-06-09 CN CN2009100624589A patent/CN101570405B/en not_active Expired - Fee Related
Non-Patent Citations (4)
| Title |
|---|
| 姜振元.水泥回转窑结圈的预防和处理.《水泥》.1996,(第8期),第11-13页. * |
| 张高飞.如何解决回转窑生产中的结圈问题.《建材技术与应用》.2008,(第3期),第12-14页. * |
| 杨晓东.回转窑结圈的原因及处理方法.《烧结球团》.1998,第23卷(第2期),第44-45页. * |
| 赵晓东.浅谈干法回转窑后结圈的形成和处理.《中国建材科技》.1999,(第3期),第47页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101570405A (en) | 2009-11-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5295775B2 (en) | Glass composition | |
| CN101921072B (en) | Method for removing ring formation of rotary kiln for active lime calcination | |
| CN103539361B (en) | Take flyash as inorganic fibre and the manufacture method thereof of main raw material | |
| CN102389955A (en) | Crystallizer casting powder for high-aluminum steel continuous casting | |
| CN102795870B (en) | Light-weight magnesia brick and preparation method thereof | |
| CN109053204B (en) | Refractory foundry sand and preparation method thereof | |
| CN106336200B (en) | A kind of inorfil toughening refractory material and its preparation process | |
| CN101921071B (en) | Method for removing ringing during coal powder injection in rotary kiln | |
| CN108203246A (en) | Utilize the method for molten ash production inorfil generated in coal gasification course | |
| CN101570405B (en) | Method for removing formed ring of rotary kiln under high temperature by using forsterite and sodium silicate | |
| CN103539347A (en) | Inorganic fiber with solid waste as raw material and production method thereof | |
| AU2014237864A1 (en) | Glass batch materials having a core-shell structure | |
| CN103102057B (en) | The preparation method of the glass batch of self-adhesive and predecomposition | |
| CN113753864B (en) | Method for preparing sulfuric acid and coproducing slag cotton fibers from high-impurity phosphogypsum | |
| CN101302077B (en) | Method for directly producing foamed glass by using slag tapping boil slag | |
| JP6382837B2 (en) | Glass manufacturing method using electric melting | |
| CA2312837C (en) | Production of man-made vitreous fibres | |
| CN101863654B (en) | Bio-soluble ceramic fiber and preparation method thereof | |
| CN110453064A (en) | A kind of method that molten copper slag modification mentions iron and its tailings preparation ceramics | |
| CN106336227A (en) | Minerals waste refractory material and preparation technology thereof | |
| KR101724168B1 (en) | Method for manufacturing granules from powder materials | |
| US10364183B2 (en) | Composite comprising a mineral wool comprising a sugar | |
| CN105731849A (en) | Environment-friendly regenerated glass sand preparation method and environment-friendly regenerated glass sand | |
| EP3095765A1 (en) | Glass batch pelletizing method using activated cullet | |
| CN101260012A (en) | Method for producing composite particle slow release silicon fertilizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20140609 |
|
| EXPY | Termination of patent right or utility model |