CN201007602Y - Pre-baked anode rotary kiln - Google Patents
Pre-baked anode rotary kiln Download PDFInfo
- Publication number
- CN201007602Y CN201007602Y CNU2007201044074U CN200720104407U CN201007602Y CN 201007602 Y CN201007602 Y CN 201007602Y CN U2007201044074 U CNU2007201044074 U CN U2007201044074U CN 200720104407 U CN200720104407 U CN 200720104407U CN 201007602 Y CN201007602 Y CN 201007602Y
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- China
- Prior art keywords
- heat
- rotary kiln
- insulating layer
- temperature
- baked
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- Expired - Fee Related
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- Muffle Furnaces And Rotary Kilns (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The utility model relates to a pre-baked-anode style rotary kiln which is characterized in that double layer heat-insulating materials are arranged on the rotary kiln, namely a lightweight heat-insulating layer of high heat conductivity is arranged in a lining body close to high temperature and the heat-insulating layer of low heat conductivity is arranged in the lining body close to steel body. The utility model of the pre-baked-anode style rotary kiln efficiently decreases the temperature of the kiln skin, thereby reducing spaces between pouring materials, avoiding high-heated powder to erode the heat-insulating layer from the spaces, extending operating life of the inner lining, improving performance of heat conductivity and insulation and effectively reducing fuel consumption during calcinations process.
Description
Technical field
The utility model relates to the good prebaked anode rotary kiln of a kind of durability in the aluminium production.
Background technology
Along with the aluminium industrial expansion, also more and more higher to the prebaked anode requirement, quality of prebaked anode not only is related to the electrolysis production economic and technical norms and the environmental protection aspect is also produced certain influence.The first road heat treatment step that calcining is produced as prebaked anode, the performance of its calcining raw materials directly has influence on product properties.In improving the material performance process, equipment is the first obstacle that the restriction product quality improves, how under the prerequisite of quality assurance.Effectively prolong service life of equipment, and fuel savings is the problem of always studying as calciner author.
Having more than 85% of domestic production prebaked anode all is to adopt calcined by rotary kiln to realize large-scale production at present.Rotary kiln is the cylinder that a steel plate is riveted or is welded, it be firing equipment be again a conveying equipment, calcining raw materials petroleum coke portion is within it accepted the burning of external heat supply or self fugitive constituent and is reached about 1300 ℃. finish a series of physical-chemical reactions, offer the qualified prebake word anode raw material of next procedure---forge back Jiao.In order to bear 1300 ℃ even higher temperature, in the steel cylinder, want tamping to water material feeding refractory lining body, the service life of refractory lining body and performance are the keys that rotary kiln is realized energy-conservation production.The service life of general inner liner of rotary kiln, this we can say the production that is restricting rotary kiln to a certain extent about 300 days.So long as be engaged in the worker that rotary kiln is produced, all in the service life of the prolongation inner liner of rotary kiln of trying every means, but most research of colleague is all on its service life.Current society " saving, cleaning, safety " has become main body, and inner liner of rotary kiln is a heat catalysis, and it is not only the prerequisite of ordinary production, and is to save the key of producing.Therefore, not only to consider in the process that selecting for use of interior liner in pouring material its temperature tolerance also will consider its thermal conductivity, could not only guarantee service life but also realize energy-conservation production like this.
In actual production process, situation from the liner use, its damage or to come off be not to be caused by itself heat resistance difference, the most material feedings of watering of adopting Gong Yi thermotechnical furnace material factory of our factory, in general its temperature tolerance that waters material feeding can both satisfy the requirement of technology, operating mode.But our factory also took place several waters the material feeding case accident, from several case accident analyses, draw, cause and water the main cause that material feeding comes off and be: the high temperature powder enters from construction joint, scrubbing heat-insulation layer causes the heat-insulation layer brush empty, directly contact grasp root causes watering material feeding with grasp root oxidation scission and comes off.Therefore, prolong liner key in service life and will reduce the gap that construction joint produces exactly, the gap that construction joint produces has the work progress quality, waters the reason of several respects such as material feeding high temperature melting loss and steel billet temperature rising.Realize in actual motion and water the material feeding melting loss to increase the construction joint situation rare that construction quality is rigid in checking up at the scene and also can controls.The key that the construction joint gap increases is on steel billet temperature.Steel billet temperature is the closest with the choice relation of light thermal-insulation material, and from prolonging on the liner aspect in service life, its thermal conductivity required and should hang down when we selected to be incubated.
The insulation material that thermal conductivity is low can satisfy the purpose that reduces the steel cylinders temperature, but itself intensity and heat resistance of the low insulation material of thermal conductivity is also lower, and as the heat transfer thermal medium, it will accept the heat of fuel and fugitive constituent burning, again this heat is passed to the inner petroleum coke of calcining with the form of heat radiation, conduction then, this is fuel-saving key.From in this respect, thermal conductivity is should be higher for well, and the insulation material that thermal conductivity is high is convenient to heat up, but also will have influence on the service life in interior village.Domestic charcoal ink factory all only only adopts single heat-insulation layer according to s own situation. and require the intensity of heat-insulation layer, temperature tolerance absorbs the high producer of heat and adopts the high insulation material of thermal conductivity; Require to prolong liner service life, reduce the low insulation material of employing thermal conductivity of steel body temperature degree.
Summary of the invention
The purpose of this utility model provides a kind of construction gap that should reduce and prolongs liner service life, and being convenient to again heats up reaches the prebaked anode rotary kiln of energy-conservation effect.
The purpose of this utility model is achieved in that and courageously proposes to adopt double insulation on the high temperature resistant degree of wear analysis foundation that waters material feeding, should reduce the construction gap and prolong liner service life, and being convenient to again heats up reaches energy-conservation effect.On rotary kiln, use the double-layer heat insulation material, promptly using the high lightweight thermal insulation layer of thermal conductivity, then adopt the low heat-insulation layer of thermal conductivity near the lining body of steel body by the lining body of high temperature.
Adopt the prebaked anode rotary kiln of double insulation, steel body calcining belt temperature 280 ℃ during by original simple layer are reduced to about 140 ℃, and swell increment has reduced [00000117 * 220 (kiln body diameter) * (280 ℃ one 140 ℃)=3.6mm]; The construction gap has reduced [∏ * 3.6=11.3mm, this is to calculate according to the coefficient of expansion of the theory of steel body (A3 steel)].From the operating position of fuel, help more realizing that no fuel calcines, it is original 1/3 that total Fuel Consumption has only, and per hour consumed 1200m originally
3About coal gas (designed capacity of coal gas burner is 1800m
3/ h, aperture at ordinary times is 2/3), now consume 400m
3Coal gas about/h.
After adopting the double-layer heat insulation material, prolonged than in the past in one the service life of inner liner of rotary kiln and repaiied the cycle, nearly about 200 days, will produce more and forge back Jiao; 200 days * 5.5 (t/h) * 24 (h)=26400 (t), and will save about 250,000 yuan in repair expense.Save coal gas every day: (1200-400) * 24h=i9200m
3(press the 0.26kg anthracite and produce 1m
3Coal gas is calculated), will be sparing in the use of coal every day: 19200 * 0.26=4.9t.
Prebaked anode rotary kiln of the present utility model effectively reduces the kliner coating temperature, thereby reduce to water the gap between the material feeding, avoid the high temperature powder to corrode heat-insulation layer, prolong the service life of liner from the slit, improve heat conduction and heat-insulating property, effectively reduced the consumption of fuel in the calcination process.
Description of drawings
Fig. 1 is the utility model prebaked anode rotary structure schematic diagram.
Among the figure, the 1-rotary kiln, the high heat-insulation layer of 2-heat conduction, heat-insulation layer is hanged down in 3-heat conduction.
The specific embodiment
As shown in Figure 1, prebaked anode rotary kiln of the present utility model is to use the double-layer heat insulation material on rotary kiln 1, is promptly using the high lightweight thermal insulation layer 2 of thermal conductivity by the lining body of high temperature, then adopts the low heat-insulation layer of thermal conductivity 3 near the lining body of steel body.
Claims (1)
1. a prebaked anode rotary kiln is characterized in that using the double-layer heat insulation material on rotary kiln, promptly by the lining body of high temperature the high lightweight thermal insulation layer of thermal conductivity is being arranged, and near the lining body of steel body the low heat-insulation layer of thermal conductivity is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201044074U CN201007602Y (en) | 2007-02-12 | 2007-02-12 | Pre-baked anode rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201044074U CN201007602Y (en) | 2007-02-12 | 2007-02-12 | Pre-baked anode rotary kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201007602Y true CN201007602Y (en) | 2008-01-16 |
Family
ID=39003549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201044074U Expired - Fee Related CN201007602Y (en) | 2007-02-12 | 2007-02-12 | Pre-baked anode rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201007602Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822472A (en) * | 2014-01-22 | 2014-05-28 | 洛阳洛华窑业有限公司 | Castable kiln structure of cylindrical heat rotary equipment |
-
2007
- 2007-02-12 CN CNU2007201044074U patent/CN201007602Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822472A (en) * | 2014-01-22 | 2014-05-28 | 洛阳洛华窑业有限公司 | Castable kiln structure of cylindrical heat rotary equipment |
| CN103822472B (en) * | 2014-01-22 | 2015-08-19 | 洛阳市洛华粉体工程特种耐火材料有限公司 | A kind of cylindrical shape turns round the castable furnace binding of hot equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080116 Termination date: 20160212 |