CN104894398B - A kind of apparatus and method for for producing powdery vanadic anhydride - Google Patents
A kind of apparatus and method for for producing powdery vanadic anhydride Download PDFInfo
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Abstract
A kind of equipment for producing powdery vanadic anhydride of the present invention, belongs to field of metallurgy.Purpose is to provide a kind of equipment dedicated for APV production vanadic anhydrides.It can make APV fully oxidized, improve the grade of vanadic anhydride.Including rotary kiln device and dust pelletizing system, rotary kiln device includes cylinder of rotary kiln, burner and the transmission device that rotating speed is provided for cylinder of rotary kiln being connected with cylinder of rotary kiln, cylinder of rotary kiln is arranged in burner, one end is feed end, the other end is discharge end, feed end is higher than discharge end, and dust pelletizing system is arranged at cylinder of rotary kiln feed end and connected with cylinder of rotary kiln inner chamber；Also include the air duct of hot-air is communicated and conveyed to cylinder of rotary kiln inner chamber with cylinder of rotary kiln inner chamber, air duct one end enters cylinder of rotary kiln inner chamber by discharge end.The invention makes APV be reacted in constant temperature, negative pressure and oxidation atmosphere, and reaction is more thorough, improves the taste of vanadic anhydride product.
Description
Technical field
The invention belongs to field of metallurgy, a kind of particularly apparatus and method for for producing powdery vanadic anhydride.
Background technology
Powdery vanadic anhydride can prepare the products such as vanadium iron, vanadium aluminium, vanadium carbide and vanadium nitride, add in molten steel, can be with
Improve the mechanical property of steel.For a long time, powdery vanadic anhydride is generally produced using ammonium metavanadate oxidizing roasting.At present, go out
Show and utilized red vanadium (abbreviation APV) production powdery vanadic anhydride technology caused by vanadium slag sodium roasting-ammonium salt precipitation technique.
Compared with producing powdery vanadic anhydride using APV, following ask is primarily present using ammonium metavanadate production powdery vanadic anhydride
Topic：
1st, ammonium metavanadate production belongs to basic ammonium salts precipitation, and precipitation rate is low, and vanadium in wastewater concentration is high, cost for wastewater treatment
Height, vanadium recovery is difficult, and economic and technical norms are relatively low.
2nd, ammonium metavanadate is produced difficult compared with APV, and technical requirements are high, and ammonium salt consumption is big, and APV is the centre of vanadium smelting and extraction
Product, stable production process, technical maturity, subsequent applications are extensive, the popular raw material of category, can be carried by technologies such as removal of impurities early stage
High APV mass, it can meet that different product demand carries out production purification.
Low with APV production piece of Vanadium yields, cost is high, and production process is extensive poorly efficient, and powdery five is produced with APV
V 2 O has obvious economic benefit, can be needed by APV quality production different quality class requirement and client
Powdery vanadic anhydride product.Therefore, there is the technology of the powdered vanadic anhydride of a large amount of productions.
CN102616848A Chinese patent application discloses a kind of production method and system of powdered vanadic anhydride.
Its production method is：Ammonium poly-vanadate or ammonium metavanadate filter cake are after smashing, in quantitative continuous input drying machine；The more vanadic acid of material
Ammonium or ammonium metavanadate are dried in flash dryer or tray drier；Dried ammonium vanadate, which enters, carries out deamination in rotary kiln
Oxidation, it is 300-650 DEG C in temperature, deamination aoxidizes 2-4 hours under conditions of pressure is-10-30Pa, obtains powdery five and aoxidizes
The mixture of two vanadium or barium oxide.Ammonium poly-vanadate or ammonium metavanadate moisture are down to not higher than below 0.5wt%；Then by slipping
Pipe spiral feeds rotary kiln, is 300-650 DEG C in temperature, deamination aoxidizes 2-4 hours under conditions of pressure is-10-30Pa, obtains
Obtain the mixture of powdery vanadic anhydride or barium oxide.Caused high-temperature flue gas return drying equipment is used for drying in rotary kiln
Ammonium vanadate, dust reclaim through sack cleaner, and ammonia discharges after the obtained ammonium salt of acid solution absorption is up to standard.
Currently without the equipment of the special powdered vanadic anhydride of set of production, but utilize traditional rotary kiln pair
APV carries out deamination oxidation.Traditional rotary kiln, due to the entrance of new air, the temperature of material in cylinder of rotary kiln can be reduced, and by
In cylinder of rotary kiln barrel wall in the presence of heater, temperature is high, and along cylinder of rotary kiln radially adjacent to body centre,
Temperature is less than barrel wall, can be because inner barrel non-uniform temperature make during APV is from cylinder feed end into discharge end
APV dehydration deaminations are insufficient, APV is easily lumpd ring formation.Easily occur impurity in the vanadic anhydride product produced, reduce by five oxygen
Change the grade of two vanadium products.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of equipment dedicated for APV production vanadic anhydrides.Its
It can ensure that APV reacts in constant temperature, negative pressure and oxidation atmosphere, produce powdered vanadic anhydride, make APV reactions more abundant, carry
The high grade of vanadic anhydride product.
The technical solution adopted by the present invention is：A kind of equipment for producing powdery vanadic anhydride, including rotary kiln device and
Dust pelletizing system, the rotary kiln device include cylinder of rotary kiln, burner and be connected with cylinder of rotary kiln for rotary kiln cylinder
Body provides the transmission device of rotating speed, and the cylinder of rotary kiln is arranged in burner, and one end is feed end, and the other end is discharging
End, the feed end are higher than discharge end, the dust pelletizing system be arranged at cylinder of rotary kiln feed end and with cylinder of rotary kiln inner chamber
Connection；Also include the air duct of hot-air, the sky are communicated and conveyed to cylinder of rotary kiln inner chamber with cylinder of rotary kiln inner chamber
Feed channel one end enters cylinder of rotary kiln inner chamber by discharge end.
Further, the cylinder of rotary kiln inner chamber is provided with lifting blade.
Further, the burner is combustion chamber, and cylinder of rotary kiln runs through combustion chamber along chamber length direction, entered
Material end and discharge end are respectively positioned on outside combustion chamber, are provided with one group of burner in the combustion chamber, and one group of burner is along cylinder of rotary kiln
Length direction is arranged and is located at turn around below kiln cylinder body.
Further, the air duct includes air inlet section, bringing-up section and exhaust section, and air inlet section is exposed in air, added
Hot arc is arranged in combustion chamber, and exhaust section connects through discharge end with cylinder of rotary kiln inner chamber.
Further, the cylinder of rotary kiln is horizontal by 3~7 ° of angles.
Further, the dust pelletizing system includes sack cleaner, cleaning shaft and Dust removal chimney, the sack cleaner
With cylinder of rotary kiln inner chamber removing dust pipeline communication, the sack cleaner connects with Dust removal chimney through discharge duct.
Further, the cleaning shaft and cylinder of rotary kiln are in 60~75 ° of angles.
Further, the air inlet section of the air duct is provided with mass air flow sensor and air flow rate adjustment valve, the sky
Air-flow gauge is between air flow rate adjustment valve and combustion chamber；The cleaning shaft be provided with exhaust regulating valve, pressure gauge and
Oxygen analyser, the pressure gauge and oxygen analyser are between exhaust regulating valve and cylinder of rotary kiln；Removed on cleaning shaft close to cloth bag
One end of dirt device is provided with temperature measurer, and the temperature measurer is between exhaust regulating valve and sack cleaner.
It is using a kind of above-mentioned method for the equipment production vanadic anhydride for producing powdery vanadic anhydride：Dry
APV adds cylinder of rotary kiln according to quantity by the feed end of cylinder of rotary kiln；To cylinder of rotary kiln heat stepwise in combustion chamber, make
APV deaminations in cylinder of rotary kiln aoxidize, and continuously blast hot-air from cylinder of rotary kiln discharge end to cylinder of rotary kiln inner chamber.
Further, the cylinder of rotary kiln chamber pressure is -50pa~-150pa；Oxygen volumetric concentration be 19.5~
20.8%；One group of burner has six, and the temperature of each burner is followed successively by from feed end to discharge end：500~550 DEG C, 560~
590 DEG C, 580~610 DEG C, 580~610 DEG C, 550~590 DEG C, 200~300 DEG C；The heat for blasting cylinder of rotary kiln inner chamber
Air themperature is 200~300 DEG C, and the hot air flowrate in the air duct is 15~50m3/h。
The beneficial effects of the invention are as follows：A kind of equipment for producing powdery vanadic anhydride, including rotary kiln device and dedusting
System, the rotary kiln device includes cylinder of rotary kiln, burner and what is be connected with cylinder of rotary kiln carry for cylinder of rotary kiln
For the transmission device of rotating speed, the cylinder of rotary kiln is arranged in burner, and one end is feed end, and the other end is discharge end,
The feed end is higher than discharge end, and the dust pelletizing system is arranged at cylinder of rotary kiln feed end and connected with cylinder of rotary kiln inner chamber
It is logical；Also include the air duct of hot-air, the air are communicated and conveyed to cylinder of rotary kiln inner chamber with cylinder of rotary kiln inner chamber
Pipeline one end enters cylinder of rotary kiln inner chamber by discharge end.Due to the air duct to cylinder of rotary kiln delivered inside hot-air
Set, continuously hot-air can be supplemented to cylinder of rotary kiln inner chamber, so that it is guaranteed that oxygen atmosphere, turn avoid cold air and enter
Entering cylinder of rotary kiln causes temperature of charge to reduce, and plays a part of heating and thermal insulation to material equivalent to hot-air, so that material
Reacted in the oxidation atmosphere of constant temperature, reaction is more thorough, improves the taste of the vanadic anhydride of production.And dust pelletizing system, remove
The fine granular materials gone in cylinder of rotary kiln, waste gas caused by deamination dehydration is taken away during postscript, it is ensured that good oxidation
Atmosphere and cylinder of rotary kiln inner chamber negative pressure, avoid ammonia also original production Low Valent Vanadium.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram for the equipment for producing powdery vanadic anhydride.
In figure, cylinder of rotary kiln 1, feed end 11, discharge end 12, lifting blade 2, air duct 3, air inlet section 31, bringing-up section
32, exhaust section 33, mass air flow sensor 34, air flow rate adjustment valve 35, combustion chamber 4, burner 5, sack cleaner 6, cleaning shaft
7, exhaust regulating valve 71, pressure gauge 72, oxygen analyser 73, temperature measurer 74, Dust removal chimney 8, discharge duct 9, feed auger 10.
Embodiment
It is as follows that the present invention is described further with reference to the accompanying drawings and examples：
As shown in figure 1, a kind of equipment for producing powdery vanadic anhydride, including rotary kiln device and dust pelletizing system, it is described
Rotary kiln device include cylinder of rotary kiln 1, burner and be connected with cylinder of rotary kiln 1 for cylinder of rotary kiln 1 offer rotating speed
Transmission device, the cylinder of rotary kiln 1 is arranged in burner, and one end is feed end 11, and the other end is discharge end 12, institute
State feed end 11 and be higher than discharge end 12, the dust pelletizing system be arranged at the feed end 11 of cylinder of rotary kiln 1 and with cylinder of rotary kiln 1
Chamber connects；Also include the air duct 3 of hot-air, institute are communicated and conveyed to the inner chamber of cylinder of rotary kiln 1 with the inner chamber of cylinder of rotary kiln 1
State the one end of air duct 3 and the inner chamber of cylinder of rotary kiln 1 is entered by discharge end 12.
APV carries out being dehydrated deamination processing in the inner chamber of cylinder of rotary kiln 1, and burner heats to cylinder 1, there is provided dehydration
Temperature needed for deamination, transmission device make cylinder of rotary kiln 1 normally be turned round by required rotating speed, and transmission device can be machinery
Transmission device, can also transmission device, use existing rotary kiln transmission device.The rotating speed of transmission device offer, revolution
Setting of the feed end 11 of kiln cylinder body 1 higher than discharge end 12 makes APV be transported in cylinder of rotary kiln 1 from feed end 11 to discharge end 12
It is dynamic.APV enters the inner chamber of cylinder 1 by the feed end 11 of cylinder of rotary kiln 1, after being dehydrated deamination, the caused oxidation of powdery five two
Vanadium is exported by discharge end 12, and is dehydrated ammonia caused by deamination, nitrogen, superfine little particle etc. and is excluded by dust pelletizing system, it is ensured that
The negative pressure state of the inner chamber of cylinder of rotary kiln 1.Air duct 3 conveys the hot-air of certain temperature into cylinder of rotary kiln 1, and heat is empty
Gas plays heat effect to APV, and hot-air flows in cylinder of rotary kiln 1, makes temperature in cylinder of rotary kiln 1 along rotary kiln
The radial dispersion of cylinder 1 is uniform, will not reduce the temperature in cylinder of rotary kiln 1 because of the entrance of new air again, make rotary kiln cylinder
Constant temperature is maintained in body 1, plays insulation effect.Under the cooperation of dust pelletizing system, the entrance of hot-air has been driven in cylinder of rotary kiln 1
The vapor and ammonia of chamber generation, it is ensured that oxidation atmosphere and the inner chamber negative pressure of cylinder of rotary kiln 1.APV is in negative pressure, the oxidation of constant temperature
Dehydration deamination in atmosphere, APV reactions are more abundant, avoid caking ring formation, reduce the impurity in powdery vanadic anhydride product,
Improve the grade of powdery vanadic anhydride.Because APV by the feed end 11 of cylinder of rotary kiln 1 moves to discharge end 12, in order to
Make fully contacting for APV and hot-air, therefore, air duct 3 is entered inside cylinder of rotary kiln 1 by discharge end 12.Hot-air enters
Enter inside cylinder of rotary kiln 1, the ammonia inside cylinder of rotary kiln 1, nitrogen, superfine little particle etc. are driven, therefore, the dedusting
System is arranged at the feed end 11 of cylinder of rotary kiln 1 and connected with the inner chamber of cylinder of rotary kiln 1, also avoids as far as possible and takes the oxygen of powdery five away
Change two vanadium products.The burner can be electric furnace, or gas burner 4.
Preferably, as shown in figure 1, the inner chamber of the cylinder of rotary kiln 1 is provided with lifting blade 2.
, can be because APV can not be complete during moving to discharge end 12 by the feed end 11 of cylinder of rotary kiln 1 due to APV
Spread out entirely, cause APV cakings, cylinder ring formation, make APV reactions insufficient.Therefore, in order to further avoid APV caking, cylinder
Body ring formation phenomenon, the inner chamber of cylinder of rotary kiln 1 are provided with lifting blade 2.When cylinder of rotary kiln 1 rotates, APV is by cylinder of rotary kiln
During 1 feed end 11 moves to discharge end 12, when APV is contacted with lifting blade 2, collided, the APV under the effect of lifting blade 2
Spread out.
Preferably, the burner is combustion chamber 4, and cylinder of rotary kiln 1 runs through combustion chamber 4 along the length direction of combustion chamber 4,
Feed end 11 is respectively positioned on outside combustion chamber 4 with discharge end 12, and one group of burner 5, one group of burner 5 edge are provided with the combustion chamber 4
The length direction of cylinder of rotary kiln 1 arranges and is located at turn around the lower section of kiln cylinder body 1.
From above-mentioned embodiment：The burner can be electric furnace, or gas burner 4.But
It is that electric furnace cost is high.Therefore, the burner is combustion chamber 4.Cylinder of rotary kiln 1 runs through along the length direction of combustion chamber 4
Combustion chamber 4, it is to increase the heating surface (area) (HS of cylinder of rotary kiln 1.The cylinder 1 that one group of burner 5 is pointed in combustion chamber 4 is forged
Burn heating.One group of burner 5 arranges along the length direction of cylinder of rotary kiln 1, carries out calcine by steps to cylinder of rotary kiln 1, adapts to revolution
Each section of requirement to temperature of kiln cylinder body 1.One group of burner 5 can have as needed two, three, six etc. it is multiple.The present invention gives
The embodiment that burner 5 is six is gone out.By diagram, from left to right, burner 5 is respectively 1 point, 2 points, 3 points, 4 points, 5 points and 6 points.
Preferably, as shown in figure 1, the air duct 3 includes air inlet section 31, bringing-up section 32 and exhaust section 33, air inlet section
31 are exposed in air, and bringing-up section 32 is arranged in combustion chamber 4, and exhaust section 33 connects through discharge end 12 and the inner chamber of cylinder of rotary kiln 1
It is logical.
The hot-air conveyed by air duct 3, can there is the equipment of special offer hot-air, and the connection of air duct 3 carries
The equipment of heating air and cylinder of rotary kiln 1, there is provided the equipment of hot-air continuously provides the hot-air of required temperature, heat
Air is transported in cylinder of rotary kiln 1 through air duct 3.But the equipment cost for specially providing hot-air is high, waste of resource.
And cold air is heated using combustion chamber 4, existing equipment is make use of, into not cheap.Therefore, the air duct 3 wraps
Air inlet section 31, bringing-up section 32 and exhaust section 33 are included, air inlet section 31 is exposed in air, and bringing-up section 32 is arranged in combustion chamber 4, row
Gas section 33 connects through discharge end 12 with cylinder of rotary kiln 1.Air inlet section 31 is exposed in air, and the normal temperature air in air is by air inlet
Section 31 enters, and bringing-up section 32 is arranged in combustion chamber 4, and bringing-up section 32 is heated in combustion chamber 4, is heated when normal temperature air enters
During section 32, normal temperature air is heated to form hot-air, and hot-air is inputted inside cylinder of rotary kiln 1 through exhaust section 33 by discharge end 12.
Preferably, the cylinder of rotary kiln 1 is horizontal by 3~7 ° of angles.
In order to ensure the requirement of the APV thickness distributions in cylinder of rotary kiln 1, APV somewhere accumulation of thick is avoided, and other places
Accumulate thin, prevent APV from fully oxidized, therefore, the cylinder of rotary kiln 1 is horizontal by 3~7 ° of angles.
Preferably, as shown in figure 1, the dust pelletizing system includes sack cleaner 6, cleaning shaft 7 and Dust removal chimney 8, institute
State sack cleaner 6 to connect with the inner chamber removing dust pipeline 7 of cylinder of rotary kiln 1, the sack cleaner 6 is with Dust removal chimney 8 through row
Feed channel 9 connects.
Dust pelletizing system can be absorb groove, with discharge duct by cylinder of rotary kiln 1 with absorb groove connect, absorption groove built with
Chloride process titanium dioxide abraum salt acid solution.But ammonia and on a small quantity tiny caused by dehydration deamination can only largely be removed by absorbing groove
Particle.And substantial amounts of fine particle is still discharged into environment and pollutes environment.And compared with sack cleaner 6, absorb groove inconvenience
Negative pressure condition in regulation and control cylinder of rotary kiln 1 inner chamber, therefore, preferably, the dust pelletizing system includes sack cleaner 6, removed
Dirt pipeline 7 and Dust removal chimney 8, the sack cleaner 6 connect with the removing dust pipeline 7 of cylinder of rotary kiln 1, the sack cleaner
6 connect with Dust removal chimney 8.Sack cleaner 6 siphons away fine particle caused by dehydration deamination.And be dehydrated waste gas caused by deamination by
Discharge duct 9 arrives Dust removal chimney 8, is finally discharged by Dust removal chimney 8.Fine particle, which just will not be discharged into environment, pollutes environment.
Sack cleaner 6 can reclaim fine granular materials, and and can takes away waste gas caused by deamination dehydration, maintenance cylinder of rotary kiln 1 in time
Inner chamber negative pressure, it is ensured that good oxidizing atmosphere avoids ammonia reduction generation Low Valent Vanadium.
Preferably, the cleaning shaft 7 and cylinder of rotary kiln 1 are in 60~75 ° of angles.
In order to both can ensure that air-flow smooth can flow through cleaning shaft 7, the accumulation being convenient to clean again in cleaning shaft 7 it is thin
Little particle.Therefore, the cleaning shaft 7 spends angles with cylinder of rotary kiln 1 in 60~75 °.
Preferably, as shown in figure 1, the air inlet section 31 of the air duct 3 is provided with mass air flow sensor 34 and air mass flow
Regulating valve 35, the mass air flow sensor 34 is between air flow rate adjustment valve 35 and combustion chamber 4；Set on the cleaning shaft 7
There are exhaust regulating valve 71, pressure gauge 72 and oxygen analyser 73, the pressure gauge 72 and oxygen analyser 73 are located at exhaust regulating valve 71 and returned
Between rotary kiln cylinder 1；Temperature measurer 74 is provided with close to one end of sack cleaner 6 on cleaning shaft 7, the temperature measurer 74 is positioned at row
Between gas regulating valve 71 and sack cleaner 6.
In order to ensure the air mass flow into cylinder of rotary kiln 1, therefore, the air inlet section 31 of the air duct 3 is provided with
Mass air flow sensor 34 and air flow rate adjustment valve 35, mass air flow sensor 34 are used to detect air mass flow size, both air flow modulation
Valve 35 is used to adjust air mass flow size.The mass air flow sensor 34 between air flow rate adjustment valve 35 and combustion chamber 4, that
, behind cold air air inlet pipeline 3, air flow rate adjustment valve 35 is adjusted, until showing what is needed in mass air flow sensor 34
Air mass flow sizes values.
In order to detect the negative pressure condition in cylinder of rotary kiln 1, pressure gauge 72 is set；In order to detect in cylinder of rotary kiln 1
Oxygen content, oxygen analyser 73 is set；Because cleaning shaft 7 communicates with cylinder of rotary kiln 1, in order to convenient for production and be easy to save more
Change this into, pressure gauge 72 and oxygen analyser 73 are arranged on cleaning shaft 7.Produced to adjust dehydration deamination in cylinder of rotary kiln 1
Waste gas emission flow, therefore, cleaning shaft 7 is provided with air flow rate adjustment valve 35.In order that pressure gauge 72 and oxygen analyser 73
The negative pressure condition and oxygen content in cylinder of rotary kiln 1 can be accurately detected, therefore, the pressure gauge 72 and oxygen analyser 73 are positioned at row
Between gas regulating valve 71 and cylinder of rotary kiln 1.In order to detect the inlet temperature of sack cleaner 6, it is easy to produce management and control, avoids low
Warm waste gas causes dust to block cloth bag sack cleaner 6 into rear water vapor condensation, therefore, is removed on cleaning shaft 7 close to cloth bag
One end of dirt device 6 is provided with temperature measurer 74, and the temperature measurer 74 is between exhaust regulating valve 71 and sack cleaner 6.
The method that vanadic anhydride is produced with the equipment of above-mentioned production powdery vanadic anhydride is：Dry APV is by turning round
The feed end 11 of kiln cylinder body 1 adds cylinder of rotary kiln 1 according to quantity；To the heat stepwise of cylinder of rotary kiln 1 in combustion chamber 4, APV is set to exist
Deamination aoxidizes in cylinder of rotary kiln 1, and continuously blasts hot-air from the discharge end 12 of cylinder of rotary kiln 1 to the inner chamber of cylinder of rotary kiln 1.
Added according to quantity with 50~90kg/h charging rate by the feed end 11 of cylinder of rotary kiln 1 by dried APV
The inner chamber of cylinder of rotary kiln 1, the band communicated by the feed end 11 of cylinder of rotary kiln 1 with the inner chamber of cylinder of rotary kiln 1 as shown in Fig. 1 become
The feed auger 10 of frequency equipment, to control charging rate that APV is added into the inner chamber of cylinder of rotary kiln 1.Because APV is by rotary kiln cylinder
During the feed end 11 of body 1 moves to discharge end 12, diverse location is in along the direction of motion, just in the different stages,
Requirement of the different stages to temperature is different, and therefore, combustion chamber 4 makes APV in rotary kiln cylinder to the heat stepwise of cylinder of rotary kiln 1
Deamination aoxidizes in body 1.In order to exclude ammonia, vapor caused by dehydration deamination in cylinder of rotary kiln 1, it is ensured that oxidation atmosphere, and
Ensure the temperature in cylinder of rotary kiln 1, APV is fully reacted, and reduce the impurity in powdery vanadic anhydride, improve powder
The grade of shape vanadic anhydride, therefore, it is necessary to continuously blast hot-air from the discharge end 12 of cylinder of rotary kiln 1 to cylinder of rotary kiln 1
Cylinder of rotary kiln 1 is set to maintain constant temperature.
Preferably, the chamber pressure of cylinder of rotary kiln 1 is -50pa~-150pa；Oxygen volumetric concentration be 19.5~
20.8%；One group of burner 5 has six, and the temperature of each burner 5 is followed successively by from feed end 11 to discharge end 12：500~550
DEG C, 560~590 DEG C, 580~610 DEG C, 580~610 DEG C, 550~590 DEG C, 200~300 DEG C；It is described to blast cylinder of rotary kiln 1
The hot air temperature of inner chamber is 200~300 DEG C, and the hot air flowrate in the air duct 3 is 15~50m3/h。
Mesh ratio >=80% of APV granularities 80~160 used by this method；Moisture content≤1%, under its chemical analysis meets
Table：
| TV | S | NH3 | Fe | Si | K2O | Na2O |
| ≥48.5 | ≤0.3 | ≤0.6 | ≤0.3 | ≤0.2 | ≤0.1 | ≤1.0 |
It is improved using the quality of the powdery vanadic anhydride of this method production, the quality mark of its powdery vanadic anhydride
Standard meets following table：
| V2O5(TV meters) | Si | Fe | P | S | As | K2O+Na2O | V2O4 |
| ≥98.0 | ≤0.25 | ≤0.30 | ≤0.05 | ≤0.10 | ≤0.02 | ≤1.0 | ≤2.5 |
Embodiment 1：
When cylinder of rotary kiln 1 and horizontal plane angle are 3 °, by common APV：TV：49.1%, Si：0.07%, S：
0.17%, Fe：0.08%, Na2O+K2O：0.4%, produced with 50kg/h charging rate tissue, blast the inner chamber of cylinder of rotary kiln 1
Hot air temperature be 200 DEG C, hot air flowrate 15m3/ h, 1~6 temperature is 520 DEG C, 560 DEG C, 580 DEG C, 580 DEG C,
590 DEG C, 250 DEG C, drum speed 40s/r, cylinder negative pressure is -100pa, and oxygen volumetric concentration is 19.8%, production gained powder
Shape vanadic anhydride quality is V2O5：99.13%, V2O4：0.6%, Si：0.08%, Fe：0.09%, Na2O+K2O：0.47%,
S：0.06%, P：0.005%, As：0.005%.
Embodiment 2：
When cylinder of rotary kiln 1 and horizontal plane angle are 3 °, by common APV：TV：48.5%, Si：0.18%, S：
0.26%, Fe：0.22%, Na2O+K2O：0.93%, produced, blasted in cylinder of rotary kiln 1 with 70kg/h charging rate tissue
The hot air temperature of chamber is 200 DEG C, hot air flowrate 25m3/ h, 1~6 temperature is 500 DEG C, 590 DEG C, 590 DEG C, 600 DEG C,
590 DEG C, 200 DEG C, drum speed 55s/r, cylinder negative pressure is -50pa, and oxygen volumetric concentration is 19.5%, production gained powdery
Vanadic anhydride quality is V2O5:98.53%, V2O4:1.3%, Si:0.21%, Fe:0.12%, Na2O+K2O:1.07%, S:
0.10%, P:0.005%, As:0.005%.
Embodiment 3：
When cylinder of rotary kiln 1 and horizontal plane angle are 7 °, by common APV：TV：49.5%, Si:0.04%, S:
0.06%, Fe:0.03%, Na2O+K2O:0.21%, produced, blasted in cylinder of rotary kiln 1 with 50kg/h charging rate tissue
The hot air temperature of chamber is 300 DEG C, hot air flowrate 40m3/ h h, 1~6 temperature is 550 DEG C, 585 DEG C, 600 DEG C, 600
DEG C, 550 DEG C, 270 DEG C, drum speed 25s/r, cylinder negative pressure is -150pa, and oxygen volumetric concentration is 20.8%, production gained
Powdery vanadic anhydride quality is V2O5:99.62%, V2O4:0.2%, Si:0.05%, Fe:0.04%, Na2O+K2O:
0.26%, S:0.04%, P:0.005%, As:0.005%.
Embodiment 4：
When cylinder of rotary kiln 1 and horizontal plane angle are 7 °, by common APV：TV：48.7%, Si:0.14%, S:
0.24%, Fe:0.15%, Na2O+K2O:0.87%, produced, blasted in cylinder of rotary kiln 1 with 80kg/h charging rate tissue
The hot air temperature of chamber is 200 DEG C, hot air flowrate 50m3/ h, 1~6 temperature is 550 DEG C, 580 DEG C, 610 DEG C, 610 DEG C,
550 DEG C, 300 DEG C, drum speed 70s/r, cylinder negative pressure is -100pa, and oxygen volumetric concentration is 20.2%, production gained powder
Shape vanadic anhydride quality is V2O5:98.72%, V2O4:0.9%, Si:0.16%, Fe:0.21%, Na2O+K2O:0.94%,
S:0.08%, P:0.005%, As:0.005%.
Claims (1)
1. a kind of method for producing vanadic anhydride using equipment for producing vanadic anhydride, it is characterised in that：
A kind of equipment for producing vanadic anhydride includes rotary kiln device and dust pelletizing system, and the rotary kiln device includes rotary kiln
Cylinder (1), burner and the transmission device that rotating speed is provided for cylinder of rotary kiln (1) being connected with cylinder of rotary kiln (1), it is described
Cylinder of rotary kiln (1) is arranged in burner, and one end is feed end (11), and the other end is discharge end (12), the feed end
(11) be higher than discharge end (12), the dust pelletizing system be arranged at cylinder of rotary kiln (1) feed end (11) and with cylinder of rotary kiln (1)
Inner chamber connects；Also include the air hose of hot-air is communicated and conveyed to cylinder of rotary kiln (1) inner chamber with cylinder of rotary kiln (1) inner chamber
Road (3), described air duct (3) one end enter cylinder of rotary kiln (1) inner chamber by discharge end (12)；The burner is burning
Room (4), cylinder of rotary kiln (1) run through combustion chamber (4) along combustion chamber (4) length direction, and feed end (11) is equal with discharge end (12)
Positioned at combustion chamber (4) outside, it is provided with one group of burner (5) in the combustion chamber (4), one group of burner (5) is along cylinder of rotary kiln (1)
Length direction is arranged and is located at turn around below kiln cylinder body (1)；The dust pelletizing system includes sack cleaner (6), cleaning shaft (7)
With Dust removal chimney (8), the sack cleaner (6) connects with cylinder of rotary kiln (1) inner chamber removing dust pipeline (7), the cloth bag
Deduster (6) connects with Dust removal chimney (8) through discharge duct (9)；
Dry AVP adds cylinder of rotary kiln (1) according to quantity by the feed end (11) of cylinder of rotary kiln (1)；It is right in combustion chamber (4)
Cylinder of rotary kiln (1) heat stepwise, make AVP in the interior deamination oxidation of cylinder of rotary kiln (1), and continuously gone out by cylinder of rotary kiln (1)
Material end (12) blasts hot-air to cylinder of rotary kiln (1) inner chamber；Cylinder of rotary kiln (1) chamber pressure be -50pa~-
150pa；Oxygen volumetric concentration is 19.5~20.8%；One group of burner (5) has six, and the temperature of each burner (5) is from charging
End (11) to discharge end (12) is followed successively by：500~550 DEG C, 560~590 DEG C, 580~610 DEG C, 580~610 DEG C, 550~590
DEG C, 200~300 DEG C；The hot air temperature for blasting cylinder of rotary kiln (1) inner chamber is 200~300 DEG C, the air duct
(3) hot air flowrate in is 15~50m3/h。
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| CN101811734B (en) * | 2010-03-22 | 2011-07-20 | 昆明理工大学 | Method for producing vanadium pentoxide by microwave calcinations of ammonium metavanadate |
| CN102021315B (en) * | 2010-11-09 | 2012-05-09 | 化工部长沙设计研究院 | Process for calcining ammonium metavanadate for preparing powdered vanadium pentoxide |
| CN202254763U (en) * | 2011-08-26 | 2012-05-30 | 攀钢集团有限公司 | Material hoisting device of rotary kiln |
| CN102616848A (en) * | 2012-02-27 | 2012-08-01 | 河北钢铁股份有限公司承德分公司 | Production method and production system for vanadium pentoxide |
| CN203132332U (en) * | 2012-11-08 | 2013-08-14 | 攀钢集团攀枝花钢钒有限公司 | Rotary kiln barrel body for reduction reaction of materials and rotary kiln used for producing vanadium oxide |
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