CN104894398A - Equipment and method for producing powdery vanadium oxide - Google Patents
Equipment and method for producing powdery vanadium oxide Download PDFInfo
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- CN104894398A CN104894398A CN201510334815.8A CN201510334815A CN104894398A CN 104894398 A CN104894398 A CN 104894398A CN 201510334815 A CN201510334815 A CN 201510334815A CN 104894398 A CN104894398 A CN 104894398A
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Abstract
The invention discloses equipment for producing powdery vanadium oxide, belongs to the field of metallurgy, and aims to provide special equipment for producing the powdery vanadium oxide from APV. By the aid of the equipment, the APV can be fully oxidized and the grade of the vanadium oxide can be increased. The equipment comprises a rotary kiln device, a dust removal system and an air pipeline, wherein the rotary kiln device comprises a rotary kiln drum, a combustion device and a transmission device, the transmission device is connected with the rotary kiln drum and provides the rotating speed for the rotary kiln drum, the rotary kiln drum is arranged in the combustion device, one end is a feeding end, the other end is a discharging end, and the feeding end is higher than the discharging end; the dust removal system is arranged at the feeding end of the rotary kiln drum and communicated with an inner cavity of the rotary kiln drum; the air pipeline is communicated with the inner cavity of the rotary kiln drum and delivers hot air to the inner cavity of the rotary kiln drum, and one end of the air pipeline enters the inner cavity of the rotary kiln drum from the discharging end. According to the equipment, the APV reacts in a constant-temperature and negative-pressure oxidation atmosphere, the reaction is more thorough, and the grade of the vanadium oxide product is increased.
Description
Technical field
The invention belongs to field of metallurgy, particularly a kind of apparatus and method for producing powdery Vanadium Pentoxide in FLAKES.
Background technology
Powdery Vanadium Pentoxide in FLAKES can prepare the products such as vanadium iron, vanadium aluminium, vanadium carbide and vanadium nitride, adds in molten steel, can improve the mechanical property of steel.For a long time, powdery Vanadium Pentoxide in FLAKES generally adopts ammonium meta-vanadate oxidizing roasting to produce.At present, occurred that the red vanadium (being called for short APV) utilizing vanadium slag sodium roasting-ammonium salt precipitation technique to produce produces powdery Vanadium Pentoxide in FLAKES technology.Producing compared with powdery Vanadium Pentoxide in FLAKES with utilizing APV, utilizing ammonium meta-vanadate to produce powdery Vanadium Pentoxide in FLAKES and mainly there is following problem:
1, ammonium meta-vanadate is produced and is belonged to basic ammonium salts precipitation, and precipitation rate is low, and vanadium in wastewater concentration is high, and cost for wastewater treatment is high, and vanadium reclaims difficulty, and economic and technical norms are on the low side.
2, comparatively APV difficulty produced by ammonium meta-vanadate, technical requirements is high, ammonium salt consumption is large, and APV is the intermediate product of vanadium smelting and extraction, stable production process, technical maturity, subsequent applications extensively, belong to popular raw material, APV quality can be improved by technology such as removal of impurities in early stage, variant production demand can be met and carry out productions purification.
Piece of Vanadium yield is produced low with APV, cost is high, the extensive poor efficiency of production process, produces powdery Vanadium Pentoxide in FLAKES with APV and has obvious economic benefit, can be produced the powdery Vanadium Pentoxide in FLAKES product of different mass class requirement and client's needs by the quality of APV.Therefore, there is the technology of the Powdered Vanadium Pentoxide in FLAKES of a large amount of production.
The Chinese patent application of CN102616848A discloses a kind of production method and system of Powdered Vanadium Pentoxide in FLAKES.Its production method is: ammonium poly-vanadate or ammonium meta-vanadate filter cake are after smashing, and quantitative continuous print drops in drying machine; Material ammonium poly-vanadate or ammonium meta-vanadate are at flash dryer or tray drier inner drying; Dried ammonium vanadate enters in rotary kiln and carries out deamination oxidation, is 300-650 DEG C in temperature, and pressure is deamination oxidation 2-4 hour under the condition of-10-30Pa, obtains the mixture of powdery Vanadium Pentoxide in FLAKES or barium oxide.Ammonium poly-vanadate or ammonium meta-vanadate moisture are down to not higher than below 0.5wt%; Then by elephant trunk spiral feeding rotary kiln, be 300-650 DEG C in temperature, pressure is deamination oxidation 2-4 hour under the condition of-10-30Pa, obtains the mixture of powdery Vanadium Pentoxide in FLAKES or barium oxide.The high-temperature flue gas produced in rotary kiln returns drying plant for ammonium vanadate drying, and dust reclaims through sack cleaner, ammonia discharge after the obtained ammonium salt of acid solution absorption is up to standard.
There is no the equipment of the special Powdered Vanadium Pentoxide in FLAKES of complete production at present, but utilize traditional rotary kiln to carry out deamination oxidation to APV.Tradition rotary kiln, due to entering of new air, the temperature of material in cylinder of rotary kiln can be reduced, and because the barrel wall of cylinder of rotary kiln is under the effect of heating unit, temperature is high, and radial near body centre along cylinder of rotary kiln, temperature is lower than barrel wall, when APV enters the process of discharge end from cylindrical shell feed end, can the deamination that dewater be insufficient because inner barrel non-uniform temperature make APV, APV is easily lumpd ring formation.Easily there is impurity in the Vanadium Pentoxide in FLAKES product produced, reduce the grade of Vanadium Pentoxide in FLAKES product.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of equipment being specifically designed to APV production Vanadium Pentoxide in FLAKES.It can guarantee that APV reacts in constant temperature, negative pressure and oxidation atmosphere, produces Powdered Vanadium Pentoxide in FLAKES, makes APV react more abundant, improves the grade of Vanadium Pentoxide in FLAKES product.
The technical solution used in the present invention is: a kind of equipment producing powdery Vanadium Pentoxide in FLAKES, comprise rotary kiln device and dust-removal system, described rotary kiln device comprise cylinder of rotary kiln, combustion unit and be connected with cylinder of rotary kiln provide the transmission mechanism of rotating speed for cylinder of rotary kiln, described cylinder of rotary kiln is arranged in combustion unit, one end is feed end, the other end is discharge end, described feed end higher than discharge end, described dust-removal system be arranged at cylinder of rotary kiln feed end and with cylinder of rotary kiln inner space; Also comprise and to communicate with cylinder of rotary kiln inner chamber and to carry the air line of warm air to cylinder of rotary kiln inner chamber, described air line one end enters cylinder of rotary kiln inner chamber by discharge end.
Further, described cylinder of rotary kiln inner chamber is provided with material delivering plate.
Further, described combustion unit is combustion chamber, and cylinder of rotary kiln runs through combustion chamber along chamber length direction, and feed end and discharge end are all positioned at outside combustion chamber, be provided with one group of burner in described combustion chamber, described one group of burner arranges along cylinder of rotary kiln length direction and is positioned at below cylinder of rotary kiln.
Further, described air line comprises air inlet section, heating zone and exhaust section, and air inlet section exposes in air, and heating zone is arranged in combustion chamber, and exhaust section is through discharge end and cylinder of rotary kiln inner space.
Further, described cylinder of rotary kiln is horizontal by 3 ~ 7 ° of angles.
Further, described dust-removal system comprises sack cleaner, cleaning shaft and Dust removal chimney, and described sack cleaner is communicated with through cleaning shaft with cylinder of rotary kiln inner chamber, and described sack cleaner is communicated with through gas exhaust duct with Dust removal chimney.
Further, described cleaning shaft and cylinder of rotary kiln are 60 ~ 75 ° of angles.
Further, the air inlet section of described air line is provided with air flowmeter and air flow rate adjustment valve, and described air flowmeter is between air flow rate adjustment valve and combustion chamber; Described cleaning shaft is provided with exhaust regulating valve, tensimeter and oxygen measuring instrument, and described tensimeter and oxygen measuring instrument are between exhaust regulating valve and cylinder of rotary kiln; One end near sack cleaner on cleaning shaft is provided with temperature measurer, and described temperature measurer is between exhaust regulating valve and sack cleaner.
A kind of above-mentioned method of producing the device fabrication Vanadium Pentoxide in FLAKES of powdery Vanadium Pentoxide in FLAKES is utilized to be: dry APV adds cylinder of rotary kiln according to quantity by the feed end of cylinder of rotary kiln; To cylinder of rotary kiln zone heating in combustion chamber, make APV deamination oxidation in cylinder of rotary kiln, and blast warm air by cylinder of rotary kiln discharge end to cylinder of rotary kiln inner chamber continuously.
Further, described cylinder of rotary kiln chamber pressure is-50pa ~-150pa; Carrier of oxygen volume concentrations is 19.5 ~ 20.8%; Described 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 described hot air temperature blasting cylinder of rotary kiln inner chamber is 200 ~ 300 DEG C, and the hot air flowrate in described air line is 15 ~ 50m
3/ h.
The invention has the beneficial effects as follows: a kind of equipment producing powdery Vanadium Pentoxide in FLAKES, comprise rotary kiln device and dust-removal system, described rotary kiln device comprise cylinder of rotary kiln, combustion unit and be connected with cylinder of rotary kiln provide the transmission mechanism of rotating speed for cylinder of rotary kiln, described cylinder of rotary kiln is arranged in combustion unit, one end is feed end, the other end is discharge end, described feed end higher than discharge end, described dust-removal system be arranged at cylinder of rotary kiln feed end and with cylinder of rotary kiln inner space; Also comprise and to communicate with cylinder of rotary kiln inner chamber and to carry the air line of warm air to cylinder of rotary kiln inner chamber, described air line one end enters cylinder of rotary kiln inner chamber by discharge end.Due to the setting of the air line to cylinder of rotary kiln delivered inside warm air, can continuously to cylinder of rotary kiln inner chamber supplemental heat air, thus guarantee oxygen atmosphere, turn avoid freezing air to enter cylinder of rotary kiln and cause temperature of charge to reduce, be equivalent to warm air plays heating and thermal insulation effect to material, thus material is reacted in the oxidation atmosphere of constant temperature, reaction is more thorough, improves the taste of the Vanadium Pentoxide in FLAKES of production.And dust-removal system, eliminate the fine granular materials in cylinder of rotary kiln, during postscript, taken away the waste gas that deamination dehydration produces, ensure that good oxidation atmosphere and cylinder of rotary kiln inner chamber negative pressure, avoid ammonia also original production Low Valent Vanadium.
Accompanying drawing explanation
Fig. 1 is a kind of schematic diagram producing the equipment of powdery Vanadium Pentoxide in FLAKES.
In figure, cylinder of rotary kiln 1, feed end 11, discharge end 12, material delivering plate 2, air line 3, air inlet section 31, heating zone 32, exhaust section 33, air flowmeter 34, air flow rate adjustment valve 35, combustion chamber 4, burner 5, sack cleaner 6, cleaning shaft 7, exhaust regulating valve 71, tensimeter 72, oxygen measuring instrument 73, temperature measurer 74, Dust removal chimney 8, gas exhaust duct 9, feed auger 10.
Embodiment
Below in conjunction with drawings and Examples, that the present invention is described further is as follows:
As shown in Figure 1, a kind of equipment producing powdery Vanadium Pentoxide in FLAKES, comprise rotary kiln device and dust-removal system, described rotary kiln device comprise cylinder of rotary kiln 1, combustion unit and be connected with cylinder of rotary kiln 1 provide the transmission mechanism of rotating speed for cylinder of rotary kiln 1, described cylinder of rotary kiln 1 is arranged in combustion unit, one end is feed end 11, the other end is discharge end 12, described feed end 11 higher than discharge end 12, described dust-removal system be arranged at cylinder of rotary kiln 1 feed end 11 and with cylinder of rotary kiln 1 inner space; Also comprise and to communicate with cylinder of rotary kiln 1 inner chamber and to carry the air line 3 of warm air to cylinder of rotary kiln 1 inner chamber, described air line 3 one end enters cylinder of rotary kiln 1 inner chamber by discharge end 12.
APV carries out the process of dehydration deamination at cylinder of rotary kiln 1 inner chamber; combustion unit heats cylindrical shell 1; the temperature of dehydration needed for deamination is provided; transmission mechanism makes cylinder of rotary kiln 1 normally turn round by required rotating speed; transmission mechanism can be mechanical drive; also can transmission mechanism, use existing rotary kiln transmission mechanism.The rotating speed that transmission mechanism provides, cylinder of rotary kiln 1 feed end 11 make APV be moved to discharge end 12 by feed end 11 in cylinder of rotary kiln 1 higher than the setting of discharge end 12.APV enters cylindrical shell 1 inner chamber by the feed end 11 of cylinder of rotary kiln 1, after dehydration deamination, the powdery Vanadium Pentoxide in FLAKES produced is exported by discharge end 12, and ammonia, nitrogen, superfine small-particle etc. that the deamination that dewaters produces are got rid of through dust-removal system, ensure that the negative pressure state of cylinder of rotary kiln 1 inner chamber.The warm air of certain temperature carried by air line 3 in cylinder of rotary kiln 1, warm air plays heat effect to APV, and warm air flows in cylinder of rotary kiln 1, make the temperature in cylinder of rotary kiln 1 even along cylinder of rotary kiln 1 radial dispersion, the temperature that can not reduce in cylinder of rotary kiln 1 because of new entering of air again, make to maintain constant temperature in cylinder of rotary kiln 1, play insulation effect.Under the cooperation of dust-removal system, the entering of warm air has driven the water vapour and ammonia that cylinder of rotary kiln 1 inner chamber generates, and ensure that oxidation atmosphere and cylinder of rotary kiln 1 inner chamber negative pressure.APV dewaters deamination in the oxidation atmosphere of negative pressure, constant temperature, and APV reaction is more abundant, avoids caking ring formation, decreases the impurity in powdery Vanadium Pentoxide in FLAKES product, improve the grade of powdery Vanadium Pentoxide in FLAKES.Because APV moves to discharge end 12 by the feed end 11 of cylinder of rotary kiln 1, in order to make fully contacting of APV and warm air, therefore, it is inner that air line 3 enters cylinder of rotary kiln 1 by discharge end 12.It is inner that warm air enters cylinder of rotary kiln 1, the ammonia of cylinder of rotary kiln 1 inside, nitrogen, superfine small-particle etc. are driven, therefore, described dust-removal system be arranged at cylinder of rotary kiln 1 feed end 11 and with cylinder of rotary kiln 1 inner space, also avoid as far as possible and take powdery Vanadium Pentoxide in FLAKES product away.Described combustion unit can be electrical heater, also can be gas burner 4.
Preferably, as shown in Figure 1, described cylinder of rotary kiln 1 inner chamber is provided with material delivering plate 2.
Because APV moves in the process of discharge end 12 by the feed end 11 of cylinder of rotary kiln 1, because APV can not spread out completely, APV caking, cylindrical shell ring formation can be caused, make APV react insufficient.Therefore, in order to avoid further, APV lumps, cylindrical shell ring formation phenomenon, and described cylinder of rotary kiln 1 inner chamber is provided with material delivering plate 2.When cylinder of rotary kiln 1 rotates, in the process that APV is moved by feed end 11 to the discharge end 12 of cylinder of rotary kiln 1, APV contacts with material delivering plate 2, when colliding, under material delivering plate 2 acts on, APV spreads out.
Preferably, described combustion unit is combustion chamber 4, cylinder of rotary kiln 1 runs through combustion chamber 4 along combustion chamber 4 length direction, feed end 11 and discharge end 12 are all positioned at outside combustion chamber 4, be provided with one group of burner 5 in described combustion chamber 4, described one group of burner 5 arranges along cylinder of rotary kiln 1 length direction and is positioned at below cylinder of rotary kiln 1.
From above-mentioned embodiment: described combustion unit can be electrical heater, it also can be gas burner 4.But electrical heater cost is high.Therefore, described combustion unit is combustion chamber 4.Cylinder of rotary kiln 1 runs through combustion chamber 4 along combustion chamber 4 length direction, is the heating-surface area in order to increase cylinder of rotary kiln 1.One group of burner 5 carries out calcining heating to the cylindrical shell 1 being positioned at combustion chamber 4.One group of burner 5, along the arrangement of cylinder of rotary kiln 1 length direction, carries out calcine by steps to cylinder of rotary kiln 1, adapts to cylinder of rotary kiln 1 each section of requirement to temperature.One group of burner 5 can have as required two, three, six etc. multiple.The present invention gives the embodiment that burner 5 is six.By diagram, from left to right, burner 5 is respectively 1 point, 2 points, 3 points, 4 points, and 6 points at 5.
Preferably, as shown in Figure 1, described air line 3 comprises air inlet section 31, heating zone 32 and exhaust section 33, and air inlet section 31 exposes in air, and heating zone 32 is arranged in combustion chamber 4, and exhaust section 33 is through discharge end 12 and cylinder of rotary kiln 1 inner space.
The warm air carried by air line 3, the special equipment that warm air is provided can be had, air line 3 is communicated with the equipment and the cylinder of rotary kiln 1 that provide warm air, there is provided the warm air that the equipment of warm air provides temperature required continuously, warm air is transported in cylinder of rotary kiln 1 through air line 3.But, provide the equipment cost of warm air high specially, waste resource.And utilize 4 pairs, combustion chamber freezing air to heat, make use of existing equipment, become not cheap.Therefore, described air line 3 comprises air inlet section 31, heating zone 32 and exhaust section 33, and air inlet section 31 exposes in air, and heating zone 32 is arranged in combustion chamber 4, and exhaust section 33 is communicated with cylinder of rotary kiln 1 through discharge end 12.Air inlet section 31 exposes in air, normal temperature air in air is entered by air inlet section 31, heating zone 32 is arranged in combustion chamber 4, in combustion chamber 4, heating zone 32 is heated, when normal temperature air enters heating zone 32, normal temperature air is heated to form warm air, and it is inner that warm air inputs cylinder of rotary kiln 1 through exhaust section 33 by discharge end 12.
Preferably, described cylinder of rotary kiln 1 is horizontal by 3 ~ 7 ° of angles.
In order to ensure the APV thickness distribution requirement in cylinder of rotary kiln 1, avoid APV accumulation of thick somewhere, and other place piles up, and makes APV can not be fully oxidized thin, therefore, described cylinder of rotary kiln 1 is horizontal by 3 ~ 7 ° of angles.
Preferably, as shown in Figure 1, described dust-removal system comprises sack cleaner 6, cleaning shaft 7 and Dust removal chimney 8, and described sack cleaner 6 is communicated with through cleaning shaft 7 with cylinder of rotary kiln 1 inner chamber, and described sack cleaner 6 is communicated with through gas exhaust duct 9 with Dust removal chimney 8.
Dust-removal system can be absorption cell, is communicated with by cylinder of rotary kiln 1 with gas exhaust duct with absorption cell, and absorption cell is built with chloride process titanium dioxide waste hydrochloric acid solution.But absorption cell can only remove the ammonia of dehydration deamination generation and a small amount of fine particle in a large number.And a large amount of fine particles is still discharged into contaminate environment in environment.And compared with sack cleaner 6, absorption cell is not easy to the negative pressure condition of cylinder of rotary kiln 1 inner chamber, therefore, as preferably, described dust-removal system comprises sack cleaner 6, cleaning shaft 7 and Dust removal chimney 8, described sack cleaner 6 is communicated with through cleaning shaft 7 with cylinder of rotary kiln 1, and described sack cleaner 6 is communicated with Dust removal chimney 8.Sack cleaner 6 siphons away the fine particle that dehydration deamination produces.And dewater deamination produce waste gas by gas exhaust duct 9 to Dust removal chimney 8, finally discharged by Dust removal chimney 8.Fine particle just can not be discharged into contaminate environment in environment.Sack cleaner 6 can reclaim fine granular materials, can take away again the waste gas that deamination dehydration produces in time, maintains cylinder of rotary kiln 1 inner chamber negative pressure, guarantees that good oxidizing atmosphere is avoided ammonia to reduce and generated Low Valent Vanadium.
Preferably, described cleaning shaft 7 and cylinder of rotary kiln 1 are in 60 ~ 75 ° of angles.
In order to guarantee that air-flow smooth and easyly can flow through cleaning shaft 7, be convenient to again the fine particle of the accumulation of clearing up in cleaning shaft 7.Therefore, described cleaning shaft 7 spends angle with cylinder of rotary kiln 1 in 60 ~ 75 °.
Preferably, as shown in Figure 1, the air inlet section 31 of described air line 3 is provided with air flowmeter 34 and air flow rate adjustment valve 35, and described air flowmeter 34 is between air flow rate adjustment valve 35 and combustion chamber 4; Described cleaning shaft 7 is provided with exhaust regulating valve 71, tensimeter 72 and oxygen measuring instrument 73, and described tensimeter 72 and oxygen measuring instrument 73 are between exhaust regulating valve 71 and cylinder of rotary kiln 1; One end near sack cleaner 6 on cleaning shaft 7 is provided with temperature measurer 74, and described temperature measurer 74 is between exhaust regulating valve 71 and sack cleaner 6.
In order to ensure the air flow quantity entering cylinder of rotary kiln 1, therefore, the air inlet section 31 of described air line 3 is provided with air flowmeter 34 and air flow rate adjustment valve 35, and air flowmeter 34 is for detecting air flow quantity size, and air flow rate adjustment valve 35 is for regulating air flow quantity size.Described air flowmeter 34, between air flow rate adjustment valve 35 and combustion chamber 4, so, after freezing air enters air line 3, regulates air flow rate adjustment valve 35, until air flowmeter 34 shows the air flow quantity sizes values of needs.
In order to detect the negative pressure condition in cylinder of rotary kiln 1, tensimeter 72 is set; In order to detect the oxygen content in cylinder of rotary kiln 1, oxygen measuring instrument 73 is set; Because cleaning shaft 7 communicates with cylinder of rotary kiln 1, in order to convenient for production and be convenient to save replacement cost, tensimeter 72 and oxygen measuring instrument 73 are arranged on cleaning shaft 7.In order to regulate the exhaust gas emission flow that in cylinder of rotary kiln 1, dehydration deamination produces, therefore, cleaning shaft 7 is provided with air flow rate adjustment valve 35.In order to make tensimeter 72 and oxygen measuring instrument 73 accurately can detect negative pressure condition in cylinder of rotary kiln 1 and oxygen content, therefore, described tensimeter 72 and oxygen measuring instrument 73 are between exhaust regulating valve 71 and cylinder of rotary kiln 1.In order to detect the inlet temperature of sack cleaner 6, be convenient to production management and control, avoiding low temperature waste gas to enter rear water vapor condensation causes dust to block cloth bag sack cleaner 6, therefore, one end near sack cleaner 6 on cleaning shaft 7 is provided with temperature measurer 74, and described temperature measurer 74 is between exhaust regulating valve 71 and sack cleaner 6.
By the method for the device fabrication Vanadium Pentoxide in FLAKES of above-mentioned production powdery Vanadium Pentoxide in FLAKES be: dry APV adds cylinder of rotary kiln 1 according to quantity by the feed end 11 of cylinder of rotary kiln 1; To cylinder of rotary kiln 1 zone heating in combustion chamber 4, make APV deamination oxidation in cylinder of rotary kiln 1, and blast warm air by cylinder of rotary kiln 1 discharge end 12 to cylinder of rotary kiln 1 inner chamber continuously.
Cylinder of rotary kiln 1 inner chamber is added with the input speed of 50 ~ 90kg/h according to quantity by the feed end 11 of cylinder of rotary kiln 1 through dried APV, as the feed auger 10 of the band frequency conversion equipment communicated with cylinder of rotary kiln 1 inner chamber by cylinder of rotary kiln 1 feed end 11 shown in Fig. 1, in order to control input speed, APV is added cylinder of rotary kiln 1 inner chamber.Because APV moves in the process of discharge end 12 by the feed end 11 of cylinder of rotary kiln 1, different positions is in along direction of motion, just the different stages is in, the different stages is different to the requirement of temperature, therefore, 4 pairs, combustion chamber cylinder of rotary kiln 1 zone heating, makes APV deamination oxidation in cylinder of rotary kiln 1.In order to get rid of ammonia, the water vapour that in cylinder of rotary kiln 1, dehydration deamination produces; guarantee to be oxidized atmosphere; and guarantee the temperature in cylinder of rotary kiln 1; APV can fully be reacted; and the impurity reduced in powdery Vanadium Pentoxide in FLAKES; improve the grade of powdery Vanadium Pentoxide in FLAKES, therefore, need to blast warm air by cylinder of rotary kiln 1 discharge end 12 to cylinder of rotary kiln 1 continuously and make cylinder of rotary kiln 1 maintain constant temperature.
Preferably, described cylinder of rotary kiln 1 chamber pressure is-50pa ~-150pa; Carrier of oxygen volume concentrations is 19.5 ~ 20.8%; Described 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; The described hot air temperature blasting cylinder of rotary kiln 1 inner chamber is 200 ~ 300 DEG C, and the hot air flowrate in described air line 3 is 15 ~ 50m
3/ h.
APV granularity 80 ~ 160 order ratio >=80% that present method adopts; Moisture content≤1%, its Chemical Composition meets following table:
| TV | S | NH 3 | Fe | Si | K 2O | Na 2O |
| ≥48.5 | ≤0.3 | ≤0.6 | ≤0.3 | ≤0.2 | ≤0.1 | ≤1.0 |
The quality of the powdery Vanadium Pentoxide in FLAKES utilizing present method to produce is improved, and the quality standard of its powdery Vanadium Pentoxide in FLAKES meets following table:
| V 2O 5(TV meter) | Si | Fe | P | S | As | K 2O+Na 2O | V 2O 4 |
| ≥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%, Na
2o+K
2o:0.4%, produces with the input speed tissue of 50kg/h, and the hot air temperature blasting cylinder of rotary kiln 1 inner chamber is 200 DEG C, and hot air flowrate is 15m
3/ h, 1 ~ 6 temperature is 520 DEG C, 560 DEG C, 580 DEG C, 580 DEG C, 590 DEG C, 250 DEG C, and drum speed is 40s/r, and cylindrical shell negative pressure is-100pa, and carrier of oxygen volume concentrations is 19.8%, and producing gained powdery Vanadium Pentoxide in FLAKES quality is V
2o
5: 99.13%, V
2o
4: 0.6%, Si:0.08%, Fe:0.09%, Na
2o+K
2o: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%, Na
2o+K
2o:0.93%, produces with the input speed tissue of 70kg/h, and the hot air temperature blasting cylinder of rotary kiln 1 inner chamber is 200 DEG C, and hot air flowrate is 25m
3/ h, 1 ~ 6 temperature is 500 DEG C, 590 DEG C, 590 DEG C, 600 DEG C, 590 DEG C, 200 DEG C, and drum speed is 55s/r, and cylindrical shell negative pressure is-50pa, and carrier of oxygen volume concentrations is 19.5%, and producing gained powdery Vanadium Pentoxide in FLAKES quality is V
2o
5: 98.53%, V
2o
4: 1.3%, Si:0.21%, Fe:0.12%, Na
2o+K
2o: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%, Na
2o+K
2o:0.21%, produces with the input speed tissue of 50kg/h, and the hot air temperature blasting cylinder of rotary kiln 1 inner chamber is 300 DEG C, and hot air flowrate is 40m
3/ h h, 1 ~ 6 temperature is 550 DEG C, 585 DEG C, 600 DEG C, 600 DEG C, 550 DEG C, 270 DEG C, and drum speed is 25s/r, and cylindrical shell negative pressure is-150pa, and carrier of oxygen volume concentrations is 20.8%, and producing gained powdery Vanadium Pentoxide in FLAKES quality is V
2o
5: 99.62%, V
2o
4: 0.2%, Si:0.05%, Fe:0.04%, Na
2o+K
2o: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%, Na
2o+K
2o:0.87%, produces with the input speed tissue of 80kg/h, and the hot air temperature blasting cylinder of rotary kiln 1 inner chamber is 200 DEG C, and hot air flowrate is 50m
3/ h, 1 ~ 6 temperature is 550 DEG C, 580 DEG C, 610 DEG C, 610 DEG C, 550 DEG C, 300 DEG C, and drum speed is 70s/r, and cylindrical shell negative pressure is-100pa, and carrier of oxygen volume concentrations is 20.2%, and producing gained powdery Vanadium Pentoxide in FLAKES quality is V
2o
5: 98.72%, V
2o
4: 0.9%, Si:0.16%, Fe:0.21%, Na
2o+K
2o:0.94%, S:0.08%, P:0.005%, As:0.005%.
Claims (10)
1. produce the equipment of powdery Vanadium Pentoxide in FLAKES for one kind, comprise rotary kiln device and dust-removal system, described rotary kiln device comprises cylinder of rotary kiln (1), combustion unit and be connected with cylinder of rotary kiln (1) provide the transmission mechanism of rotating speed for cylinder of rotary kiln (1), described cylinder of rotary kiln (1) is arranged in combustion unit, one end is feed end (11), the other end is discharge end (12), described feed end (11) is higher than discharge end (12), described dust-removal system be arranged at cylinder of rotary kiln (1) feed end (11) and with cylinder of rotary kiln (1) inner space, it is characterized in that: also comprise and to communicate with cylinder of rotary kiln (1) inner chamber and to carry the air line (3) of warm air to cylinder of rotary kiln (1) inner chamber, described air line (3) one end enters cylinder of rotary kiln (1) inner chamber by discharge end (12).
2. a kind of equipment producing powdery Vanadium Pentoxide in FLAKES as claimed in claim 1, is characterized in that: described cylinder of rotary kiln (1) inner chamber is provided with material delivering plate (2).
3. a kind of equipment producing powdery Vanadium Pentoxide in FLAKES as claimed in claim 1, it is characterized in that: described combustion unit is combustion chamber (4), cylinder of rotary kiln (1) runs through combustion chamber (4) along combustion chamber (4) length direction, feed end (11) and discharge end (12) are all positioned at combustion chamber (4) outward, be provided with one group of burner (5) in described combustion chamber (4), described one group of burner (5) arranges along cylinder of rotary kiln (1) length direction and is positioned at cylinder of rotary kiln (1) below.
4. a kind of equipment producing powdery Vanadium Pentoxide in FLAKES as claimed in claim 3, it is characterized in that: described air line (3) comprises air inlet section (31), heating zone (32) and exhaust section (33), air inlet section (31) exposes in air, heating zone (32) is arranged in combustion chamber (4), and exhaust section (33) is through discharge end (12) and cylinder of rotary kiln (1) inner space.
5. a kind of equipment producing powdery Vanadium Pentoxide in FLAKES as described in claim 1-4 any one claim, is characterized in that: described cylinder of rotary kiln (1) is horizontal by 3 ~ 7 ° of angles.
6. a kind of equipment producing powdery Vanadium Pentoxide in FLAKES as described in claim 1-4 any one claim, it is characterized in that: described dust-removal system comprises sack cleaner (6), cleaning shaft (7) and Dust removal chimney (8), described sack cleaner (6) is communicated with through cleaning shaft (7) with cylinder of rotary kiln (1) inner chamber, and described sack cleaner (6) is communicated with through gas exhaust duct (9) with Dust removal chimney (8).
7. a kind of equipment producing powdery Vanadium Pentoxide in FLAKES as claimed in claim 6, is characterized in that: described cleaning shaft (7) and cylinder of rotary kiln (1) are in 60 ~ 75 ° of angles.
8. a kind of equipment producing powdery Vanadium Pentoxide in FLAKES as claimed in claim 6, it is characterized in that: the air inlet section (31) of described air line (3) is provided with air flowmeter (34) and air flow rate adjustment valve (35), and described air flowmeter (34) is positioned between air flow rate adjustment valve (35) and combustion chamber (4); Described cleaning shaft (7) is provided with exhaust regulating valve (71), tensimeter (72) and oxygen measuring instrument (73), and described tensimeter (72) and oxygen measuring instrument (73) are positioned between exhaust regulating valve (71) and cylinder of rotary kiln (1); The upper one end near sack cleaner (6) of cleaning shaft (7) is provided with temperature measurer (74), and described temperature measurer (74) is positioned between exhaust regulating valve (71) and sack cleaner (6).
9. utilize a kind of method of producing the device fabrication Vanadium Pentoxide in FLAKES of powdery Vanadium Pentoxide in FLAKES described in claim 6, it is characterized in that: dry AVP adds cylinder of rotary kiln (1) according to quantity by the feed end (11) of cylinder of rotary kiln (1); To cylinder of rotary kiln (1) zone heating in combustion chamber (4), make AVP deamination oxidation in cylinder of rotary kiln (1), and blast warm air by cylinder of rotary kiln (1) discharge end (12) to cylinder of rotary kiln (1) inner chamber continuously.
10. method of producing Vanadium Pentoxide in FLAKES as claimed in claim 9, is characterized in that: described cylinder of rotary kiln (1) chamber pressure is-50pa ~-150pa; Carrier of oxygen volume concentrations is 19.5 ~ 20.8%; Described 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; The described hot air temperature blasting cylinder of rotary kiln (1) inner chamber is 200 ~ 300 DEG C, and the hot air flowrate in described air line (3) is 15 ~ 50m
3/ h.
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