CN1667335A - Composite secondary and triple lance of charcoal rotary kiln and making method thereof - Google Patents
Composite secondary and triple lance of charcoal rotary kiln and making method thereof Download PDFInfo
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- CN1667335A CN1667335A CN 200410008166 CN200410008166A CN1667335A CN 1667335 A CN1667335 A CN 1667335A CN 200410008166 CN200410008166 CN 200410008166 CN 200410008166 A CN200410008166 A CN 200410008166A CN 1667335 A CN1667335 A CN 1667335A
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Abstract
The invention discloses a char rotary kiln compounding two or three times wind fairing and the method to manufacturing. It is made up of outside layer that can endure high temperature, framework layer, and light heat insulation keeping layer. The framework layer is between the outside layer and the light heat insulation keeping layer. The material of the wind fairing is abio-nonmetal material; the material of outside layer is mullite, dillimanite, magnalium spinel or high aluminum material; the inner layer of the light heat insulation keeping layer is calcium silicate, pearl floating filling material or alumina hollow ball filling material; the material of the framework layer is oxygenous silicon carbide or recrystallization silicon carbide. The invention would make the defect-extending and structure transforming no longer appear.
Description
Technical field
The present invention relates to a kind of carbon rotary kiln two, the tertiary air mouth, a kind of specifically tuyere that is composited.The invention still further relates to that this is compound two, the preparation method of tertiary air mouth.
Background technology
Two, the effect of tertiary air mouth in carbon rotary kiln:
1, with it the outer natural air of kiln is introduced the fugitive constituent of combustion-supporting carbon raw materials in the rotary kiln.In calcining during carbon raw materials, just there is fugitive constituent to separate out since 200 ℃, these fugitive constituents mainly are with CO and alkanes and a small amount of gaseous impurities.These fugitive constituents are combustible basically, if can save a large amount of energy in the kiln internal combustion.If two, the tertiary air mouth normally moves, basically without postcombustion.But two, the tertiary air mouth is as can not normally moving, just must extra fuel.The heavy oil that is consumed with Φ 2.2 * 45m calcined by rotary kiln material production capacity 3.5t～5.5t/h calculates 0.5t/h, 12t/d, a month combusting heavy oil 360t.In addition, if fugitive constituent can not will be extracted into heavy grey chamber with negative pressure in the kiln internal combustion.Run into just acutely burning of oxygen in heavy grey chamber, the carbon raw materials of the high temperature that enters heavy grey chamber of igniting simultaneously produces the quick-fried accident of spray sometimes.The accident of sinking grey chamber, burning out waste heat boiler appears burning down in the enterprise that also has.
2, elongate burning zone.Because two, the tertiary air mouth fugitive constituent that burnt has formed long high-temperature area in kiln, make the changeover portion thermograde mild.
3, the heavy grey chamber effect of performance.Because fugitive constituent burnouts in kiln substantially, enter the high-temperature flue gas that has only of heavy grey chamber, there is not combustible, Controllable Temperature is built in 1000 ℃ ± 50 ℃.The effect of heavy grey chamber is given full play of, and also can prolong the service life of heavy grey chamber.And obstruct dust to enter waste heat boiler, and prolong waste heat boiler service life, reduced dust to environmental emission.
4, improve calcining material quality.Because long high-temperature area and mild changeover portion thermograde have been arranged.Carbon raw materials heavily burn shrinking in calcination process finished gradually and regularly, so mass ratio is more even, is very favorable to the quality of later stage product.
5, minimizing stops the kiln number of times, can effectively prolong the service life of rotary kiln.
At present, two, the tertiary air mouth structure is that material feeding is watered in the pipe outsourcing in the steel skeleton, two, the tertiary air mouth is construction in the rotary kiln at the scene, will pipe be installed by the location in the steel skeleton earlier, periphery along pipe in the steel skeleton surrounds template by distance to a declared goal then, will water the interior ramming of material feeding injection mould again and give system.Relevant patent is: " the tuyere pour mass of CN2573972Y rotary kiln ".Tuyere ramming in kiln gives after the system through 3～5 days natural curing, wishes then to finish sintering in the process of igniting baking kiln.But, can only go to check with visual method to the ramming quality of watering material feeding two, tertiary air mouth from demoulding maintenance to igniting baking kiln and the overall process of in kiln, burning till.If mass defect is apparent in view, just must removes and reform.But there are enough durations.Because production task is urgent, general enterprise does not have condition.If mass defect is not obvious, be difficult to find by range estimation, be in a kind of unassured stochastic regime.Secondary tuyere at the such high temperature of rotary kiln, shake, wash away, interiorly move in the adverse circumstances of heat outside cold.The tuyere defective is extended, and internal stress produces new defective, falls piece, scorification etc.More than after any one problem occurs, all cause the stopping production once again of rotary kiln.
On the other hand, pipe castable two, tertiary air mouth have the self-defect contradiction that is difficult to avoid in the steel skeleton.
1, pipe and watering on resonableization of the material feeding index is essentially different in the steel.One class is that metal material, a class are Inorganic Non-metallic Materials, and coexisting for a long time, variety of issue must appear in operation in＞1250 ℃ of high temperature.
2, the initial temperature of Peng Zhanging is different with the coefficient of expansion, and interior pipe is since 100 ℃ of expansions, and coefficient is 16.1～18.8 * 10
-6/ ℃, and the coefficient of expansion from 200 ℃～1000 ℃ that waters material feeding is 4.5～8.5 * 10
-6/ ℃, when high temperature, also can heavily burn contraction simultaneously.In the steel pipe with water material feeding and do inconsistent motion in different time and position mutually.This changing of the relative positions infringement has caused the different defectives of two class materials.
3, the recrystallization that material feeding two, tertiary air mouth are watered in the pipe outsourcing in the steel skeleton will just can be finished by baking kiln process and serviceability temperature.But the carbon rotary kiln of aluminum current industry baking kiln maximum temperature is 1250 ℃ ± 50 ℃, only depends on kiln temperature to be difficult to finish.
4, operating temperature is different with refractoriness (fusing points of steel).It is Inorganic Non-metallic Materials that material feeding is watered in outsourcing, its sintering temperature also is its intensity minimum point, be exactly that prototype structure lost efficacy, original binding agent raises along with temperature more than 1100 ℃ the time and loses caking property to the deep layer migration, new structure will form in 1250 ℃～1350 ℃ temperature again, and the decomposition of watering material feeding self in this section temperature blank is the first step.And the termination of the interior pipe of steel this moment has begun fusion (the Cr25Ni20Si material just begins fusion at 2h more than 1150 ℃), does not have the support effect.Refractory material just forms irregular coming off owing to lose support.Next section termination of the interior pipe of steel was exposed to again under the thermal-flame after refractory material came off, and at high temperature the termination of pipe produces fusion again in the steel ..., vicious circle so repeatedly.Charge level in pipe end is lower than kiln (charge level floods will material be poured in down a chimney from the mouth of pipe behind the pipe end and enters blower fan) is forced to stop kiln.
Be generally about 90 days service life by secondary tuyere up-to-standard behind construction, baker, the sintering in the aluminum current industry carbon rotary kiln.That is to say that complete qualified secondary tuyere also takes every operation and will stop kiln maintenance replacing in three months once.But any one in rotary kiln among a group 10 two, tertiary air mouth damaged and all must be stopped kiln and handle.
The rotary kiln of general enterprise owing to the liner reason all want every year overhaul or in repair.
Summary of the invention
Compound two, the tertiary air mouth that the purpose of this invention is to provide that a kind of carbon rotary kiln uses, with solve that existing carbon rotary kiln uses two, the tertiary air mouth is owing to adopt pipe outsourcing in the steel skeleton to water the structure of material feeding, make pipe in the steel skeleton and water material feeding inharmonious in high temperature, outerly in addition water material feeding and will rely on and use rotary kiln self temperature to come sintering to finish the recrystallization of tuyere, the life-span is short in the rotary kiln production run, fault rate is high for tuyere, can not the problem of moving steady in a long-term.Purpose of the present invention also will provide a kind of this preparation method compound two, the tertiary air mouth.
For achieving the above object, compound two, the tertiary air mouth of carbon rotary kiln of the present invention, tuyere is fixed on the rotary kiln barrel, and the tuyere outside is a conical structure.
The tuyere of three-layer composite structure is adopted at secondary wind position in rotary kiln, and it is composited for three layers by high temperature resistant skin, casing play, light heat insulating internal layer, is casing play between high temperature resistant skin and the light heat insulating internal layer; The material of tuyere is an Inorganic Non-metallic Materials, and high temperature resistant outer field material is selected from mullite, sillimanite, magnesium aluminate spinel or creep resistant high alumina refractories, preferred mullite or creep resistant high alumina refractories; The material of light heat insulating internal layer is selected from calcium silicates, float that pearl is watered material feeding or alumina hollow ball waters material feeding, preferred calcium silicates or float pearl and water material feeding; The material of casing play is selected from and contains siloxicon, silicon nitride combined silicon carbide or recrystallized silicon carbide, preferred silicon nitride combined silicon carbide or recrystallized silicon carbide.The effect of light heat insulation layer is to intercept cold air that kiln the enters destruction to casing play outward.Make the tuyere of three-layer composite structure, comprise following several steps: A, make casing play: after the selection, burn till in the High-temp. kiln outside carbon rotary kiln (nitriding furnace, high temperature furnace, recrystallization stove), nitriding furnace or high temperature furnace be 1400 ℃～1500 ℃ temperature, and the recrystallization stove is 1700 ℃～2300 ℃ temperature; Filter out the interior pipe of skeleton of no physics defective then; B, making casing play and outer field assembly: outside carbon rotary kiln, high temperature resistant skin and casing play are made one in model, dry behind vibration moulding or the moulding by casting, test sieve is selected the base substrate of no physics defective; Pass through double sintering then in High-temp. kiln, sintering temperature is 1450 ℃～1600 ℃, and the interior pipe position of casing play will cover with carbon granule, and test sieve is selected the assembly of no physics defective; C, make compound tuyere: the assembly that bakes is fixed in the model, vibration moulding of lightweight heat-proof material or the moulding by casting of getting ready become the light heat insulating internal layer, oven dry or low-temperature sintering, test sieve is selected the tuyere of no physics defective.D, respectively that tuyere and steel clamping band is supporting outside kiln.Secondary wind position in rotary kiln, serviceability temperature is 1300 ℃, firing temperature is 1450 ℃～1600 ℃, thereby adopts the tuyere of three-layer composite structure.
The temperature at tertiary air position is lower in rotary kiln, can adopt two-layer compound layer tuyere, and it is formed by high temperature resistant skin and light heat insulating internal layer two-layer compound, and the material of tuyere is an Inorganic Non-metallic Materials; High temperature resistant outer field material is selected from and contains siloxicon, silicon nitride combined silicon carbide or recrystallized silicon carbide, preferred silicon nitride combined silicon carbide or recrystallized silicon carbide, the material of light heat insulating internal layer are selected from calcium silicates and float that pearl is watered material feeding or alumina hollow ball waters material feeding.Make the tuyere of two-layer composite, comprise following several steps: A, make skin: after the selection, burn till in the High-temp. kiln outside carbon rotary kiln (nitriding furnace, high temperature furnace, recrystallization stove), nitriding furnace or high temperature furnace are 1400 ℃～1500 ℃ temperature, and the recrystallization stove is 1700 ℃～2300 ℃ temperature; Filter out the high temperature resistant skin of no physics defective then; B, make compound tuyere: the skin that will bake is fixed in the model, and vibration moulding of lightweight heat-proof material or the moulding by casting of getting ready become the light heat insulating internal layer, oven dry or low-temperature sintering, and test sieve is selected the tuyere of no physics defective.C, respectively that tuyere and steel clamping band is supporting outside kiln.The temperature at tertiary air position lower (about 950 ℃～1150 ℃) in rotary kiln adopts two-layer compound layer tuyere comparatively economical and practical.
The effect of light heat insulating internal layer is to intercept cold air that kiln enters outward to casing play or outer field destruction.
The compound tuyere of the present invention is fastening and be welded on the rotary kiln barrel by the annular steel clamping band, and annulus is stuck in tuyere outer wall bottom apart from 140～180mm place, tuyere bottom in the steel clamping band.
Compound each layer of tuyere of the present invention selected materials is the multiple function Inorganic Non-metallic Materials different with physical and chemical index and makes, and the thermal expansion initial temperature and the coefficient of expansion are very close, do not have the physical condition of mutual changing of the relative positions injury.
Because the present invention is compound two, the making of the high temperature resistant skin of tertiary air mouth and casing play all is to finish in the High-temp. kiln being higher than the carbon rotary kiln of serviceability temperature outside, so can not occur that defective is extended and the structure transformation when in rotary kiln, using again.The Volume Changes of only expanding with heat and contract with cold.
The present invention is compound two, the normal service life of tertiary air mouth is generally more than 24 months.
High-quality two, the energy-saving benefit of tertiary air mouth is very high, is example with Φ 2.2 * 45M rotary kiln: year operation work calendar 300 days, 5.5 tons/h of design production capacity, 39600 tons/year, heavy oil consumption is 65kg～95kg/ ton product, year consumes 2574 tons～3762 tons in heavy oil.Design heavy oil consumption 0kg～35kg/ ton product behind use two, the tertiary air mouth.Consume heavy oil year less than 1380 tons.In fact use two, the skilled enterprise of tertiary air mouth can reach little consumption, only uses fuel when baker.
Table 1: the compound tuyere manufacturing technology table of three-decker of the present invention
| 1, casing play is made | |||||
| Project | The selection material | Once-firing | Check screening | ||
| Level | Sequence number | The material selection item | Preference | Firing atmosphere, temperature, time | Test sieve is selected the skeleton of no physics defective |
| Casing play | 1 | Contain siloxicon | 1350 ℃～1450 ℃ 10h of reducing atmosphere | ||
| 2 | Silicon nitride combined silicon carbide | Silicon nitride combined silicon carbide | 1250 ℃～1450 ℃ 36h 〉=1450 ℃ 12h of | ||
| 3 | Recrystallized silicon carbide | Recrystallized silicon carbide | 1700 ℃～2300 ℃ 10h of reducing atmosphere recrystallization stove | ||
| 2, skin and casing play are made one in model, vibration moulding or moulding by casting.Oven dry back test sieve is selected the base substrate of no physics defective. | |||||
| 3, composite bed is made (skin+casing play) | |||||
| Project | The selection material | Twice firing | Check screening | ||
| Level | Sequence number | Cladding material is selected item for use | Preference | Firing atmosphere, temperature, time | Test sieve is selected the assembly of no physics defective |
| Casing play+high-temperature-resistant layer | 1 | Mullite | Mullite | 1600 ℃ of 20h of oxidizing atmosphere | |
| 2 | Sillimanite | 1500 ℃ of 20h of oxidizing | |||
| 3 | Magnesium aluminate spinel | 1600 ℃ of 20h of oxidizing | |||
| 4 | The creep resistant high alumina refractories | The creep resistant high alumina refractories | 1530 ℃ of 20h of oxidizing | ||
| 4, the wind that skin and casing play are baked is chewed and is fixed in the model, and vibration moulding of lightweight heat-proof material or the moulding by casting of getting ready become inner insulating layer, oven dry. | |||||
| Project | The selection material | Burn till for three times | Check screening | ||
| Level | Sequence number | Inner layer material is selected item for use | Preference | Firing atmosphere, temperature, time | Test sieve is selected the wind of no physics defective and is chewed (product) |
| Thermal insulation layer | 1 | Calcium silicates | Calcium silicates | The air flow hot blast, general atmosphere normal temperature～350 ℃ of 20h | |
| 2 | Float pearl and water material feeding | Float pearl and water material feeding | |||
| 3 | Alumina hollow ball waters material feeding | ||||
| 5, steel clamping band is made | |||||
| It is 1Cr18Ni9 or Cr25Ni20 heat resisting steel that steel clamping band adopts material, and specification 20 * 20 is made into ring-type by designated diameter, and disposes 4 claws. | |||||
| 6, earlier outside kiln supporting respectively wind chew and the steel card, in kiln, fix with welding manner earlier on the appointed positions, again wind is chewed on every side with precasting yard or is watered material feeding and fill.After maintenance, can heat up by curve.General rotary kiln is newly-built or repair back rekindling production greatly, should carry out by baking kiln curve, to two, tertiary air do not chew not influence. | |||||
Table 2: the used various types of materials physical and chemical index of the compound tuyere of the present invention reference table
| Sequence number | Title material | The highest lasting serviceability temperature (℃) | Main chemical compositions (%) | Bulk density (kg/M 3) | 0.2MPa loading softening begin temperature (℃) | Refractoriness (℃) | Cold crushing strength (MPa) | Heat endurance (inferior) | Thermal conductivity [W (m. ℃)] | 200 ℃-1000 ℃ of averages coefficient of linear expansion |
| ????1 | Mullite | ????1450 | Al 2O 372％SiO 228％ | ????2350 | ????＞1600 | ??＞1790 | ??50～100 | ????＞25 | ????3.8 | 5.5～5.8×10 -6 |
| ????2 | Sillimanite | ????1450 | Al 2O 355％SiO 244％ | ????2450 | ????＞1520 | ??＞1790 | ??54 | ????＞20 | ????3.8 | 5.3×10 -6 |
| ????3 | Magnesium aluminate spinel | ????1450 | MgO85％Al 2O 3＜18％ | ????2760 | ????＞1650 | ??＞1790 | ??70～100 | ????＞19 | ????2.8--3.7 | 1.1～2.8×10 -6 |
| ????4 | Creep resistant high alumina matter | ????1450 | Al 2O 375％ | ????2760 | ????1490 | ??＞1790 | ??53～69 | ????＞10 | ????5 | 8.0～8.5×10 -6 |
| ????5 | Contain siloxicon | ????1400 | SiC????75～85％ | ????2600 | ????1500 | 2000 ℃ of fusing points | ??60 | ????＞35 | ????17.4 | 4.5～5×10 -6 |
| ????6 | Silicon nitride combined silicon carbide | ????1450 | SiC72％Si 3N 423％ | ????2650 | ????1750 | 1900 ℃ of fusing points | ??100 | ????＞35 | ????15.5 | 4.7～5×10 -6 |
| ????7 | Recrystallized silicon carbide | ????1650 | SiC99％ | ????3100 | 2500 ℃ of fusing points | ??250 | ????＞25 | ????24 | 4.0～4.5×10 -6 | |
| ????8 | Calcium silicates | ????900～1100 | ????230 | ????1050 | ????0.05+10 -4t | |||||
| ????9 | Float pearl and water material feeding | ????1100～1300 | Al 2O 345％Fe 2O 32％ | ????1300 | ????1320 | ??1600 | ??4 | ????＞25 | ????0.6 | 11.5～13×10 -6 |
| ????10 | Alumina hollow ball waters material feeding | ????1450～1750 | Al 2O 390％Fe 2O 30.5％ | ????0.8 | ????1420 | ??1750 | ??8 | ????＞35 | ????0.7 | 0.7～0.8×10 -6 |
| ????11 | 1Cr18Ni9Ti | ????800 | ????7850 | ????41 | ～18.5×10 -6 | |||||
| ????12 | 3Cr25Ni20 | ????1000 | ????7850 | ????41 | ～18.5×10 -6 |
Table 3: the carbon rotary kiln two of aluminium industry, tertiary air mouth economic efficiency contrast table
| Project | Pipe castable in the steel skeleton | The composite inorganic nonmetallic |
| Service life | ||
| 3 months | 12 months | |
| Year consumption | 40 | 10 |
| Unit price | Interior pipe: 1700.00 yuan/are watered material feeding: 1200.00 yuan of/construction costs: 530.00 yuan of/totals: 3430.00 yuan/ | 8000.00 unit/ |
| Total price | 40 * 3430=137200 unit | 10 * 8000=80000 unit |
| Stop the kiln time | Heating and cooling: 2 the week/time, repairing tuyere needed for 1 week.Becalmed 4 | Heating and cooling: 2 the week/time, repairing tuyere needed for 1 week.Becalmed 4 times 1 |
| Production time in year | Overhaul: (repairing tuyere simultaneously) repaiied | Overhaul: (repairing tuyere simultaneously) repaiied tuyere in 50 days: the reality that do not take time in addition can utilize working day: 365-50=315 (my god) |
| Influence to kiln lining | Shorten about 8 months of burning zone life-span, cause 300,000 yuan/year of direct losses | No liner bursts, and can reduce 300,000 yuan/year of direct losses |
| Influence to production capacity | Can increase production and forge 8300 tons in back material |
Description of drawings
Fig. 1 is a structural representation existing two, the tertiary air mouth;
Fig. 2 is the structural representation of first kind of embodiment of the present invention;
Fig. 3 is the structural representation of second kind of embodiment of the present invention;
Fig. 4 is the structural representation of steel clamping band among the present invention;
Fig. 5 is compound tuyere of the present invention and the supporting stereogram of steel clamping band;
Fig. 6 is the process chart that the compound tuyere of the present invention is made.
The specific embodiment
The present invention is further described below in conjunction with accompanying drawing.
Embodiment 1
Fig. 2 shows the structure of three layers of compound tuyere of first kind of embodiment of the present invention, and its selection is: silicon nitride combined silicon carbide (casing play)+mullite (high temperature resistant skin)+calcium silicates (heat insulation internal layer).Making step is: A, making casing play, choose following casing play raw material SiN
4(16～23) %, SiC (70～75) %, Si＜0.5%.Make moulding with die pressing, in 350 ℃ of drying kilns, dried then through 10 hours.Put into the nitriding furnace nitriding atmosphere and burnt 4～10 hours through 1250 ℃ temperature, 1350 ℃ temperature was burnt 24～36 hours, and 1450 ℃ temperature was burnt 6～12 hours, and curve burns till.Filter out the interior pipe of skeleton of no physics defective then.B, making tuyere complex: the main material of high temperature resistant outer raw material is electrofused mullite 60%, electro-corundum fine powder 36%, SiO
2 Fine powder 4%, adhesive adopts arabia gum.High temperature resistant outer compound and casing play are made one vibration moulding in model, oven dry back test sieve is selected the base substrate of no physics defective, place it in then in the High-temp. kiln through double sintering, the twice firing heating curve of tuyere assembly is that 110 ℃ temperature was burnt 24 hours, 110 ℃～1550 ℃ temperature was burnt 50 hours, 1550 ℃ temperature continues 15～20 hours, and interior pipe position will cover with carbon granule; The back test sieve of coming out of the stove is selected the assembly of no physics defective.C, make compound tuyere: the assembly that bakes is fixed in the model, calcium silicate powder+water mixture moulding by casting of getting ready is become the light heat insulating internal layer, 350 ℃ temperature low temperature drying 10 hours, test sieve is selected the tuyere of no physics defective.D, tuyere steel clamping band make: use the Cr25Ni20 material, specification is 20 * 20 to be made into as Fig. 4 shape of the present invention.
Should be by following operation construction during construction and installation in rotary kiln: remove manage original steel in and two, tertiary air waters material feeding, go up in situ composite bed Inorganic Non-metallic Materials two, tertiary air mouth are installed, with the fastening compound tuyere of anchoring steel clamping band and be welded on the rotary kiln barrel, around rotary kiln high-temperature resistant inner lining 5 and 6 fillings of liner thermal insulation layer, treat to heat up by baking kiln curve after maintenance is finished.
Embodiment 2
Fig. 3 shows the structure of second kind of embodiment two-layer compound of the present invention tuyere, and its selection is: contain siloxicon (skin)+float pearl to water material feeding (thermal insulation layer).Making step is: A, make high temperature resistant skin: choose the outer raw material SiO of following high temperature
2(20～25) %, SiC (75～80) %.Make moulding with die pressing, in 350 ℃ of drying kilns, dried then through 10 hours.Put into High-temp. kiln from 350 ℃～1250 ℃ intensifications, the time surpasses 50 hours, and 10 hours, the 1350 ℃ curves that continue 24 hours of temperature burning that feed 1250 ℃～1350 ℃ of nitrogen then burn till.Filter out no physics external defect sealing then.B, make compound tuyere: the skin that will bake is fixed in the model, and the pearl of getting ready that floats is watered material+water mixture vibration moulding and becomes the light heat insulating internal layer, 350 ℃ of low temperature dryings, test sieve is selected the tuyere of no physics defective.C, tuyere steel clamping band make: use the Cr25Ni20 material, specification is 20 * 20 to be made into the shape as Fig. 4.D, outside rotary kiln that tuyere and steel clamping band is supporting.
Claims (5)
1, compound two, the tertiary air mouth of a kind of carbon rotary kiln, tuyere is fixed on the rotary kiln barrel, the tuyere outside is a conical structure, it is characterized in that: tuyere is composited for (2) three layers by high temperature resistant skin (1), casing play (3), light heat insulating internal layer, is casing play (3) between high temperature resistant skin (1) and the light heat insulating internal layer (2); The material of tuyere is an Inorganic Non-metallic Materials, and the material of high temperature resistant skin (1) is selected from mullite, sillimanite, magnesium aluminate spinel or creep resistant high alumina refractories, preferred mullite or creep resistant high alumina refractories; The material of light heat insulating internal layer (2) is selected from calcium silicates, float that pearl is watered material feeding or alumina hollow ball waters material feeding, preferred calcium silicates or float pearl and water material feeding; The material of casing play (3) is selected from and contains siloxicon, silicon nitride combined silicon carbide or recrystallized silicon carbide, preferred silicon nitride combined silicon carbide or recrystallized silicon carbide.
2, compound two, the tertiary air mouth of a kind of carbon rotary kiln, tuyere is fixed on the rotary kiln barrel, the tuyere outside is a conical structure, it is characterized in that: tuyere is formed by high temperature resistant skin (1) and light heat insulating internal layer (2) two-layer compound, and the material of tuyere is an Inorganic Non-metallic Materials; The material of high temperature resistant skin (1) is selected from and contains siloxicon, silicon nitride combined silicon carbide or recrystallized silicon carbide, preferred silicon nitride combined silicon carbide or recrystallized silicon carbide, the material of light heat insulating internal layer (2) are selected from calcium silicates and float that pearl is watered material feeding or alumina hollow ball waters material feeding.
3, compound two, the tertiary air mouth of carbon rotary kiln according to claim 1 and 2, it is characterized in that: described tuyere is fastening and be welded on the rotary kiln barrel by annular steel clamping band (4), and annulus are stuck in tuyere outer wall bottom apart from 140～180mm place, tuyere bottom in the steel clamping band 4.
4, the preparation method of, tertiary air mouth compound two according to the described carbon rotary kiln of claim 1, it is characterized in that: it may further comprise the steps:
A, make casing play: after the selection, burn till in the High-temp. kiln carbon rotary kiln outside (nitriding furnace, high temperature furnace, recrystallization stove), nitriding furnace or high temperature furnace be 1400 ℃～1500 ℃ temperature, and the stove that is recrystallized is 1700 ℃～2300 ℃ temperature; Filter out the interior pipe of skeleton of no physics defective then;
B, making casing play and outer field assembly: outside carbon rotary kiln, high temperature resistant skin and casing play are made one in model, dry behind vibration moulding or the moulding by casting, test sieve is selected the base substrate of no physics defective; Pass through double sintering then in High-temp. kiln, sintering temperature is 1450 ℃～1600 ℃, and the interior pipe position of casing play will cover with carbon granule, and test sieve is selected the assembly of no physics defective;
C, make compound tuyere: the assembly that bakes is fixed in the model, vibration moulding of lightweight heat-proof material or the moulding by casting of getting ready become the light heat insulating internal layer, oven dry or low-temperature sintering, test sieve is selected the tuyere of no physics defective.
D, respectively that tuyere and steel clamping band is supporting outside kiln.
5, the preparation method of, tertiary air mouth compound two according to the described carbon rotary kiln of claim 2, it is characterized in that: it may further comprise the steps:
A, making skin: after the selection, burn till in the High-temp. kiln outside carbon rotary kiln (nitriding furnace, high temperature furnace, recrystallization stove), nitriding furnace or high temperature furnace are 1400 ℃～1500 ℃ temperature, and the recrystallization stove is 1700 ℃～2300 ℃ temperature; Filter out the high temperature resistant skin of no physics defective then;
B, make compound tuyere: the skin that will bake is fixed in the model, and vibration moulding of lightweight heat-proof material or the moulding by casting of getting ready become the light heat insulating internal layer, oven dry or low-temperature sintering, and test sieve is selected the tuyere of no physics defective.
C, respectively that tuyere and steel clamping band is supporting outside kiln.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100081664A CN100453943C (en) | 2004-03-09 | 2004-03-09 | Composite secondary and triple lance of charcoal rotary kiln and making method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100081664A CN100453943C (en) | 2004-03-09 | 2004-03-09 | Composite secondary and triple lance of charcoal rotary kiln and making method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1667335A true CN1667335A (en) | 2005-09-14 |
| CN100453943C CN100453943C (en) | 2009-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100081664A Expired - Fee Related CN100453943C (en) | 2004-03-09 | 2004-03-09 | Composite secondary and triple lance of charcoal rotary kiln and making method thereof |
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| Country | Link |
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| CN (1) | CN100453943C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236306A (en) * | 2014-09-28 | 2014-12-24 | 湖南创元新材料有限公司 | Rotary kiln blast nozzle |
| CN104422275A (en) * | 2013-09-10 | 2015-03-18 | 贵阳铝镁设计研究院有限公司 | Structure for supplying air into rotary kiln |
| CN104480300A (en) * | 2014-11-20 | 2015-04-01 | 中南大学 | Pellet production method based on prediction of compressive strength of pellets in rotary kiln |
| CN104792156A (en) * | 2015-04-27 | 2015-07-22 | 云南源鑫炭素有限公司 | Manufacturing method for integral type tertiary air duct of rotary kiln |
| CN113490814A (en) * | 2019-05-13 | 2021-10-08 | 斗山能捷斯有限责任公司 | Fluidized bed apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235821B (en) * | 2011-05-20 | 2013-05-08 | 中冶华天工程技术有限公司 | Combined air supply nozzle, rotary kiln and preparation method of rotary kiln |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61159505A (en) * | 1985-01-07 | 1986-07-19 | Kawasaki Refract Co Ltd | Blowing lance for refining molten metal |
| JPH08310874A (en) * | 1995-05-18 | 1996-11-26 | Nippon Steel Corp | Castable refractory for lance |
| JPH09125130A (en) * | 1995-10-30 | 1997-05-13 | Toshiba Ceramics Co Ltd | Immersion lance |
| JP4511749B2 (en) * | 2001-02-27 | 2010-07-28 | 黒崎播磨株式会社 | Lance pipe for blowing powder and gas |
| CN2573927Y (en) * | 2002-09-17 | 2003-09-17 | 曾巨泓 | Methane-fired water heater |
| CN2679517Y (en) * | 2004-03-09 | 2005-02-16 | 徐向成 | Combined secondary and third tuyere of carbon rotary kiln |
-
2004
- 2004-03-09 CN CNB2004100081664A patent/CN100453943C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104422275A (en) * | 2013-09-10 | 2015-03-18 | 贵阳铝镁设计研究院有限公司 | Structure for supplying air into rotary kiln |
| CN104236306A (en) * | 2014-09-28 | 2014-12-24 | 湖南创元新材料有限公司 | Rotary kiln blast nozzle |
| CN104480300A (en) * | 2014-11-20 | 2015-04-01 | 中南大学 | Pellet production method based on prediction of compressive strength of pellets in rotary kiln |
| CN104792156A (en) * | 2015-04-27 | 2015-07-22 | 云南源鑫炭素有限公司 | Manufacturing method for integral type tertiary air duct of rotary kiln |
| CN113490814A (en) * | 2019-05-13 | 2021-10-08 | 斗山能捷斯有限责任公司 | Fluidized bed apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100453943C (en) | 2009-01-21 |
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