CN105385861A - Oxidation and calcification treatment method for vanadium slag - Google Patents
Oxidation and calcification treatment method for vanadium slag Download PDFInfo
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Abstract
The invention belongs to the field of vanadium-titanium chemical engineering, and particularly relates to an oxidation and calcification treatment method for vanadium slag. The method includes the following steps that firstly, vanadium slag pretreatment is conducted, wherein vanadium-bearing molten steel is transferred into a vanadium slag tank after vanadium extracting is over; secondly, the vanadium slag is heated and melted, wherein after the vanadium slag tank is transferred to a treatment position, vanadium slag is heated, and it is ensured that the temperature of the vanadium slag is larger than or equal to 1450 DEG C; thirdly, vanadium slag calcification and oxidation are conducted, wherein after the vanadium slag is completely melted, heating is stopped, limestone is added for calcification, and after the limestone is decomposed and melted, an oxygen lance is used for injecting oxygen for the vanadium slag; and fourthly, vanadium slag aftertreatment is conducted, wherein the vanadium slag which is completely calcified and oxidized is cooled, crushed and subjected to magnetic separation, and then V2O5 production is conducted. According to the treatment method for the vanadium slag, V2O3 in the vanadium slag can be rapidly converted into V2O5, calcification of the vanadium slag is achieved, the treated vanadium slag is cooled and subjected to magnetic separation and then can be directly subjected to acid pickling, the oxidation rate and the leaching rate of vanadium can be improved, and utilization of resources and reduction of vanadium extracting production cost are facilitated.
Description
Technical field
The invention belongs to vanadium titanium chemical field, be specifically related to the oxidation of a kind of vanadium slag, calcification processing method.
Background technology
Vanadium (V) is a kind of transiting group metal elements, and under vanadium metal normal temperature, chemical property is more stable, more active under high temperature.The valence electron structure of vanadium atom is 3d
34s
2, be typical valence variation element, five valence electrons can participate in into key, have+2 ,+3 ,+4 and+5 valence states.Under different oxygen partial pressure and temperature, the stable compound of vanadium is also different, reduces the stable existence that oxygen partial pressure raising temperature is conducive to trivalent vanadium oxide compound.In addition, vanadium also has multiple non-stoichiometric oxide, available general formula V
no
2n-1the oxide compound of the same clan that (3≤n≤9) represent.At V
2o
4and V
2o
5between, there will be a known V
3o
5, V
3o
7, V
4o
7, V
4o
9, V
5o
9, V
6o
11, V
6o
13deng oxide compound.Industrial barium oxide mainly V
2o
3, VO
2and V
2o
5, wherein V
2o
5particularly important.
Vanadium has excellent intensity, hardness and antifatigue effect because of it, and vanadium is widely used in the fields such as iron and steel, chemical industry, aviation.The vanadium of about 84% is dissolved in steel as alloying element for iron and steel and forms VC and VN, crystal grain thinning, suppress bainite and pearlitic growth to increase martensite intensity, thus improve the hardness of steel, intensity, toughness and wear resistance, it produces product with vanadium iron and VN for mainization crystal grain.Vanadium is used for non-ferrous alloy mainly with the structured material that V-Al system alloy is representative, as alloys such as excellent high temperature Aircraft Structure Materials Ti-6Al-4V, Ti-8Al-1V-Mo and Ti-6Al-6V-2Sn.Vanadium product for chemical field mainly contains V
2o
5, NH
4vO
3, V
2o
3, VOCl
3and VCl
4deng, as the electrode materials of catalyzer, tinting material, high capacity cell.It is worth mentioning that the multivalent state due to vanadium, vanadium is used as anode material of lithium battery or is developed to the energy storage devices such as ultracapacitor, has the advantages such as charging is rapid, specific energy is high, cheap, has much application prospect.In addition, the vanadium product of about 2% is also applied to the fields such as medicine, protective material and thin-film material.Now there are some researches show that vanadium compound has the effect of para-insulin, can promote the synthesis of liver starch and muscle glycogen, suppression hepatic glycogenolytic is glucose, promotes the synthesis of fat and suppresses fatty decomposition.Generally speaking, vanadium and vanadium product are widely used for improving material property or accelerating chemical reaction course mainly as additive.
Vanadium resource is as a kind of scarce resource important in the world, and without the vanadium minerals can adopted separately, it disperses in the distribution of occurring in nature very much, and main association is in sulphur navajoite VS
2or V
2s
5, plumbous navajoite (or claim vanadinite) Pb
5(VO
4)
3c, vanadium marble KV
2(AlSi
2o
10) (OH)
2, potassium vanadate uranium ore K
2(UO
2) (VO
4)
23H
2in the mineral such as O and vanadium titano-magnetite.The total reserves of whole world vanadium is 6,300 ten thousand tons, and workable reserves is 1,020 ten thousand tons.Raw material type for vanadium extraction is a lot, and the vanadium of 88% obtains from vanadium titano-magnetite in the world, and all the other vanadium extraction raw materials have bone coal, spent catalyst, oil lime-ash, yeath etc.Because of vanadium raw materials kind, mineral characteristic and wherein content of vanadium differ greatly, from also varied containing the technological process control extracting vanadium vanadium material, mainly contain pyrometallurgical smelting, wet-leaching and pyrogenic process-wet method combined extraction process.
1. pyrometallurgical smelting
Usually be main raw material with vanadium titano-magnetite, obtain vanadium-bearing hot metal by blast furnace or other ironmaking flow process, then in converter, be blown into oxygen make vanadium oxidization enrichment in metal in slag.Obtain containing V when adopting duplex to bessemerize
2o
5the vanadium slag of 8 ~ 20% and the half steel containing C about 3.6%, obtain when adopting single converter slag-making to blow containing V
2o
5the v-bearing steel slag of 2 ~ 5% and molten steel.The vanadium slag obtained or v-bearing steel slag carry out subsequent extracted through the mode of roasting-leaching or directly leaching.Along with steel-making and the demand for development of process for extracting vanadium, also occur direct in converter, add sodium carbonate blowing, obtained Vanadium and half steel, reach the object removing p and s in molten iron simultaneously.
2. wet-leaching
This kind of technique is comparatively applicable to the waste prodss such as spent catalyst, flying dust and oil lime-ash, also have be applied in bone coal on a small quantity, the raw ore such as vanadium titano-magnetite, but exist with the trivalent vanadium form of indissoluble because wherein vanadium is all main, directly leach compared with pyrometallurgical smelting and pyrogenic process-wet method combined extraction process rate of recovery lower.The technique directly leached at present mainly contains acidleach, alkali leaching, Bioleaching, pressurized acid leaching etc.R.Navarro compares acidleach and alkali leaching oil flying dust process for extracting vanadium, although thinking that NaOH leaches leaching yield is 61% have more selectivity lower than acidleach for magnesium-yttrium-transition metal compound, obtains adjusting pH to be that 8 precipitations add NH again except after Al containing vanadium solution
4cl to pH 5 just precipitablely obtains vanadium product, and deposition rate reaches 99%.D.Mishra adopts a kind of lithotrophic bacteria-sulfur oxidizing bacterium process spent catalyst, by promoting growth and the two-step pretreatment of sulfur oxidizing bacterium, V leaching rate can be made to reach 94.8%; Li etc.
[17]after the method exploring oxidizing roasting-pressurized acid leaching, normal pressure acidleach, take pressurized acid leaching extracting vanadium from stone coal V leaching rate can be brought up to 76% and the reaction times short, compare 70% of normal pressure acidleach 50% and roasting-extract technology to have and improve significantly, but this technique is higher to equipment requirements.The techniques such as precipitation-calcining, solvent extraction-back extraction are generally taked to obtain final vanadium product after vanadium being leached into solution.
3. pyrogenic process-wet method combined extraction
Because V in raw ore exists mainly with more stable trivalent vanadium form, usually need its roasting under oxidizing atmosphere to be changed into high price compound and be beneficial to leach.For the bone coal resource of China, its vanadium resource total amount of containing accounts for 87% of the total vanadium in the whole nation, vanadium grade is 0.13 ~ 1.2%, and the pyrogenic process-wet method combined extraction process of development has traditional sodium-salt calcination-water logging, blank roasting-acidleach (alkali leaching), few salt roasting-circulating leaching and calcium salt roasting-acidleach (alkali leaching) etc.Although sodium-salt calcination technique has the advantages such as maturing temperature is low, the time is short, its rate of recovery is low, produce a large amount of obnoxious flavour as HCl and Cl
2just gradually by few salt roasting or calcium salt roasting replace.
At present, the production method producing vanadium slag in world wide is more, mainly contain New Zealand's hot metal ladle and blow vanadium technique, South Africa shaking ladle process for extracting vanadium, Russia and Chinese vanadium extraction by converter blowing technique etc., other process for extracting vanadium also comprises v-bearing steel slag vanadium extraction, process for extracting vanadium from stone coal etc.Wherein most main flow is vanadium extraction by converter blowing technique, and its treatment capacity is maximum.Vanadium extraction by converter blowing technology is developed by Russia's (USSR (Union of Soviet Socialist Republics)), and exploitation is main afterwards applies in Iron And Steel Company of Nizhni Tagil.
Iron And Steel Company of Nizhni Tagil (hereinafter referred to as lower steel) is built in 1940, started in 1964 with the vanadium of blast-furnace smelting KOH-KAE card nail (unit of length) admire magnetite produce vanadium-bearing hot metal.The said firm carries out the exploration of blowing pig iron containing vanadium novel method from nineteen fifty-seven, and the duplex practice vanadium extraction of vanadium extraction by converter blowing one converter steelmaking studied by units such as Ural ferrous metallurgy institutes is made steel and succeeded.On the basis that 10t experimental converter makes a search, build up 100t converter in November, 1963 again, and carry out first commerical test, confirm the reasonableness adopting oxygen vanadium extraction from molten iron.The typical process of recommending is as follows: converter loads molten iron 115 ~ 120t, load the solid pig iron of 12% in advance, the iron scale of 5%, oxygen purity 9.2%, oxygen supply intensity 150 ~ 200m3/min, oxygen pressure 0.98 ~ 1.45MPa, spray gun height 0.7 ~ 1.5m, adopt 3 hole shower nozzles, duration of blast 8 ~ 12min.When molten bath containing vanadium higher than 0.04% time, re-blow.Result confirms the high-level efficiency with oxygen vanadium extraction, and can realize the degree of depth and remove vanadium, vanadium oxidation ratio reaches 92% ~ 94%.
1978, lower steel, in order to the throughput of equilibrium steel-making and steel rolling and the demand that meets vanadium slag, extended into 160t original 3 130t converters, newly build up again the 4th 160t converter the end of the year 1979, and adopt four to blow three dutys, i.e. a block converter vanadium extraction, two block converter steel-making, the maintenance of another seat is stand-by.In industrialness running, enable oxygen coverter vanadium extraction automation control system, carried out remaining slag operation technique.Concrete technology flow process is: the vanadium-bearing hot metal shipped from blast furnace plant, first pour the even hot metal composition of hot metal mixer and temperature into, pour molten iron into iron ladle from hot metal mixer again, transport to the workplatform of converter workshop section, with crane, molten iron is blended into converter extracting vanadium, then according to molten iron temperature and silicon content, hopper adds oxidation one refrigerant steel rolling iron sheet 70 ~ 80kg/tFe in converter, and then fall oxygen rifle and start oxygen blast, oxygen rifle height starts as 2.0m, be down to 1.0m subsequently, oxygen supply intensity is about 300m
3/ min, when in molten iron during silicone content height, whole smelting phase rifle position all keeps lower limit.In oxygen blowing process, part be melted in carbon in molten iron and most of slag making element all oxidized.Half steel temperature rises to 1340 ~ 1410 DEG C from 1230 ~ 1260 DEG C simultaneously, 2.8% ~ 3.6% is dropped at molten iron carbon content, content of vanadium drops to after 0.04%, lift oxygen rifle and stop oxygen blast, half steel is poured into half cylinder of steel, vanadium slag is poured into slag ladle or stay (during remaining slag operation) in converter.Then half cylinder of steel filling half steel is transported to converter workshop section, half steel is blended into steel-making converter and smelts.
From the beginning of the sixties, China once Shoudu Iron and Steel Co, Tang Gang, on steel, climb steel, hold and the top-blown oxygen converter of steel and Ma Gang carries out too much item half industry and type approval test, achieve a large amount of testing datas.Hold the 20t top-blown oxygen converter formally input vanadium extraction production in 1988 that steel two is made steel.China's top-blown oxygen converter vanadium extraction oxygen pressure-controlled is at 0.53 ~ 0.7MPa, and oxygen-consumption is 16.37 ~ 25.0m
3/ t; Pig, iron scale, ore, acid pellet, useless vanadium slag and high-carbon steel scrap is adopted to make refrigerant, half Carbon Content Of Steel is 3.17% ~ 3.95%, residual vanadium amount is 0.06% ~ 0.11%, half steel temperature is 1347 ~ 1420 DEG C, vanadium oxidation ratio is 68.9% ~ 87.81%, and vanadium recovery is 74.82% ~ 78.65%.But because starting material conditional fluctuation is large, operating procedure is unstable, lacks effective terminal point control means in addition, makes to blow vanadium index and also owe desirable, especially vanadium oxidation ratio and the rate of recovery, also larger with steel gap under Russia.
China climbs steel and has carried out vanadium extraction by converter blowing type approval test in 1986 ~ 1987 years, select vanadium extraction scheme provide foundation for climbing steel the second stage of the project, the invaluable experience for vanadium extraction by converter blowing productive accumulation.Hold steel and carry out the test of oxygen coverter top-bottom blowing vanadium extracting in 1993. vanadium extraction technico-economical comparison is improved comprehensively.Ma Gang started to build 30t converter extracting vanadium in nineteen ninety.1993, hold steel and transform 1# bottom blowing system for converter, airing system changes single nitrogen blowing into by hydrogen, nitrogen two-way.Bottom-blown air brick is made up of magnesite refractory, inside sets 4 internal diameters as the stainless steel tube of 2mm.This bottom-blowing device is utilized to do the vanadium extraction test of top bottom blowing.Blowing the independent top blast of oxygen supply pressure ratio again to decrease, is 0.6 ~ 0.85MPa, rifle position 0.8 ~ 1.lm, oxygen supply intensity 1.9 ~ 2.5m
3/ mint.Bottom blowing gas intensity is 0.03 ~ 0.06m
3/ mint, flow is 72 ~ 150Nm
3/ h.Test acid pellet and make refrigerant containing vanadium iron block, add-on is depending on molten iron temperature and Si, Ti content, and pelletizing add-on is 5% ~ 8% of iron water amount, and iron block add-on is 15% ~ 20%.Result shows, top and bottom complex blowing technique is obviously better than single Top Blown Process.Combined blowing process blowing is steady, slagging is fast, sticky rifle, the sticky furnace bottom of refrigerant; Half Carbon Content Of Steel on average improves 0.36%, and residual vanadium reduces by 0.017%, vanadium slag V
2o
5improve 0.2%, TFe and reduce by 4.34%, the oxidation ratio of vanadium improves 3.05%; Oxygen blow duration shortens 1 ~ 2min.Meanwhile, when terminal vanadium slag is crossed rare, independent bottom blowing nitrogen 1.5 ~ 2.0min, can make bits retrogradation, and TFe reduces by 3.28% ~ 5.93%, V
2o
5improve 0.77% ~ 1.73%.
At present, in world wide, mainly carry out the production of vanadium slag with pyrogenic process, after the vanadium slag cooling of gained, carry out vanadium production of articles in serial operation process such as carrying out fragmentation-ball milling-magnetic separation-roasting-leaching.
Publication number is " CN102086487A ", discloses a kind of vanadium slag treatment method of energy-saving and emission-reduction, first, the high-temperature liquid state vanadium slag of more than 1200 DEG C after being separated with molten iron is placed in slag ladle; Then, in slag ladle, sodium compound is added according to v slag grade, then use water-cooled supersonic speed or subsonic speed oxygen rifle to oxygen supply in slag ladle, cause strong oxidizing property atmosphere, can stirring action be played simultaneously, impel in vanadium slag and generate water-soluble vanadic acid sodium fast, for ensureing that oxygen-supplying amount is greater than each component in slag and is all oxidized to the oxygen amount needed for maxivalence oxide compound, need using the FeO/TFe in slag as the index checking degree of oxidation, the V generated in vanadium slag
2o
5with the sodium compound water generation reaction dissolubility vanadic acid sodium added, finally, the bits containing water-soluble vanadic acid sodium obtained, process obtains V
2o
5.
Publication number is " CN104532009A ", discloses a kind of extraction vanadium method of vanadium-bearing slag of high calcium and high phosphor grog, first by w (CaO) >7%, CaO/V
2o
5mass ratio >0.7, w (P
2o
5) the vanadium-bearing slag of high calcium and high phosphor chamotte crushing mill of >0.6% is carefully sized to granularity 0.050mm ~ 0.154mm, is then 4wt% ~ 25wt%NaHCO at the Na2CO3 solution of 3wt% ~ 20wt% or concentration
3solution carries out carbonating leaching, during leaching, solid-to-liquid ratio is 1:1mL/g ~ 1:15mL/g, extraction temperature 50 DEG C ~ 99 DEG C, extraction time 30 ~ 120min, stirring velocity >150r/min, obtains containing vanadium leachate after solid-liquid separation, then obtains vanadium product by the precipitation of existing maturation and deamination technique.
Publication number is " CN1082617A ", disclose a kind of method processing vanadium slag extraction Vanadium Pentoxide in FLAKES, the high temperature vanadium slag obtained to vanadium-bearing hot metal process is blown into pure oxygen or oxygen enrichment, pressurized air, also can add flux simultaneously, impels slag middle or low price vanadium oxide to be oxidized into Vanadium Pentoxide in FLAKES.After slag cooling, fragmentation, be placed in the solution of certain temperature and alkali concn, and certain oxygen pressure can be maintained in reactor, with the vanadium in leached mud.After leaching residue, the soluble vanadium adhered to is dissolved in washing, and then process is containing vanadium alkali lye, refining Vanadium Pentoxide in FLAKES.
From above-mentioned prior art, adopt heat source gas melting vanadium slag, with oxygen and limestone mine vanadium slag to be oxidized and the method for calcification processing yet there are no report, still belong to precedent.
Summary of the invention
Technical problem to be solved by this invention is to provide the oxidation of a kind of vanadium slag, calcification processing method, and the method can solve vanadium products factory and adopt vanadium slag to produce in vanadium goods process, the problem of the frequent bonding rotary kiln of calcination process.
A kind of vanadium slag oxidation of the present invention, calcification processing method, comprise the following steps:
A, vanadium slag pre-treatment: after vanadium-bearing hot metal vanadium extraction terminates, proceed in vanadium slag tank by vanadium slag, be transferred to rapidly process position;
B, vanadium slag heating and melting: vanadium slag tank heats vanadium slag after moving to process position, ensures vanadium slag temperature >=1450 DEG C;
C, vanadium slag calcification oxidation: after the complete melting of vanadium slag in b step, stop heating, add the calcification of people's Wingdale, after decomposition of limestone melting, adopt oxygen rifle to vanadium slag injecting oxygen;
D, vanadium slag aftertreatment: by the vanadium slag after step c calcification oxidation completely, carry out V after cooling, fragmentation, magnetic separation
2o
5produce.
A kind of vanadium slag oxidation described above, calcification processing method, wherein adopt gas gun to the heating of vanadium slag winding-up heat source gas in b step, heat source gas adopts supersonic speed to control.
A kind of vanadium slag oxidation described above, calcification processing method, described heat source gas is the one in blast furnace gas, coal gas of converter, liquefied petroleum gas (LPG).
A kind of vanadium slag oxidation described above, calcification processing method, wherein in step c the add-on of Wingdale with V in CaO content in Wingdale and vanadium slag
2o
5content meter, control CaO/V
2o
5=0.55 ~ 0.75; Oxygen blast Mach number controls at 0.5 ~ 1.0Ma, and flow of oxygen controls at 300 ~ 400Nm
3/ t vanadium slag.
A kind of vanadium slag oxidation described above, calcification processing method, wherein in Step d, limestone granularity is 20 ~ 30mm, CaO content >=54%.
A kind of vanadium slag oxidation of the present invention, calcification processing method, effectively can utilize the self-heating of vanadium slag, carry out the heat exhaustion that roasting brings again, can make V in vanadium slag fast simultaneously after reducing vanadium slag cooling
2o
3change into V
2o
5, and realizing vanadium slag calcification, directly can carry out acidleach after the vanadium slag cooling after process, magnetic separation, can improve oxidation ratio and the leaching yield of vanadium, the utilization and the vanadium extraction production cost that are conducive to resource reduce.
Embodiment
A kind of vanadium slag oxidation of the present invention, calcification processing method, comprise the following steps:
A, vanadium slag pre-treatment: after vanadium-bearing hot metal vanadium extraction terminates, proceed in vanadium slag tank by vanadium slag, be transferred to rapidly process position, ensure that vanadium slag is in red heat state, carries out the heat exhaustion that roasting brings again, economize on resources and manufacturing cost after reducing vanadium slag cooling;
B, vanadium slag heating and melting: vanadium slag tank heats vanadium slag after moving to process position, ensures vanadium slag temperature >=1450 DEG C;
C, vanadium slag calcification oxidation: after the complete melting of vanadium slag in b step, stop heating, add the calcification of people's Wingdale, after decomposition of limestone melting, adopt oxygen rifle to vanadium slag injecting oxygen;
D, vanadium slag aftertreatment: by the vanadium slag after step c calcification oxidation completely, carry out V after cooling, fragmentation, magnetic separation
2o
5produce.
A kind of vanadium slag oxidation described above, calcification processing method, wherein adopt gas gun to the heating of vanadium slag winding-up heat source gas in b step, heat source gas adopts supersonic speed to control.Vanadium slag heating adopts gas gun to the heating of vanadium slag winding-up heat source gas, and method is simple, easily controls; With spray gun injecting oxygen, vanadium slag is oxidized, ensures vanadium slag oxidation completely.
A kind of vanadium slag oxidation described above, calcification processing method, wherein in step c the add-on of Wingdale with V in CaO content in Wingdale and vanadium slag
2o
5content meter, control CaO/V
2o
5=0.55 ~ 0.75; The complete calcification of vanadium slag can be ensured like this, again can not be too much because of the Wingdale added, cause waste.Oxygen blast Mach number controls at 0.5 ~ 1.0Ma, and flow of oxygen controls at 300 ~ 400Nm
3/ t vanadium slag.
A kind of vanadium slag oxidation described above, calcification processing method, wherein heat source gas is the one in blast furnace gas, coal gas of converter, liquefied petroleum gas (LPG).
A kind of vanadium slag oxidation described above, calcification processing method, wherein in Step d, limestone granularity is 20 ~ 30mm, CaO content >=54%.The present invention adopts particle diameter to be the thin lump lime stone of 20 ~ 30mm, mainly because block Wingdale can impact the darker place of vanadium slag, now decomposes again and can either play the effect of seething stirring to vanadium slag, can ensure that again calcify reaction is complete.
Above-mentioned a kind of vanadium slag oxidation, calcification processing method, wherein in step c, oxygen blast Mach number controls at 0.5 ~ 1.0Ma, is to strengthen stirring and evenly mixing; Flow of oxygen controls at 300 ~ 400Nm
3/ t vanadium slag, both can ensure the complete melting of vanadium slag and oxidation, was unlikely to again excessive and caused waste.Mach number refers in hydromeehanics and is designated as Ma by the non-dimensional parameter that of characterizing fluid compressible degree is important, is defined as the ratio of speed v with the local velocity of sound c of this point of certain point in flow field, i.e. Ma=v/c.
Below in conjunction with embodiment, the specific embodiment of the present invention is further described, does not therefore limit the present invention among described scope of embodiments.
Embodiment 1
After vanadium-bearing hot metal vanadium extraction terminates, vanadium slag is poured into special vanadium slag tank from converter, and vanadium slag tank is transported in time process position, ensure the red heat state of vanadium slag; After vanadium slag tank enters process position, adopt gas gun to carry out heat source gas winding-up heating to vanadium slag, heat source gas is blast furnace gas, and heat source gas winding-up adopts supersonic speed to control, and vanadium slag temperature controls at 1450 DEG C; After vanadium slag melts completely, stop winding-up heat source gas, add block Wingdale simultaneously and carry out calcification, the add-on of Wingdale is with the CaO/V in vanadium slag
2o
5weight ratio is as the criterion and controls, CaO/V
2o
5weight ratio controls 0.55, and the Task-size Controlling of block Wingdale is between 20 ~ 30mm; Decomposing after melting until limestone mine adopts oxygen rifle to carry out oxygen blast to vanadium slag, and oxygen blast Mach number controls 0.5, and flow of oxygen controls at 400Nm
3/ t vanadium slag.Vanadium slag after process V leaching rate after the vanadium extraction of calcium method wet method reaches 93%.
Embodiment 2
After vanadium-bearing hot metal vanadium extraction terminates, vanadium slag is poured into special vanadium slag tank from converter, and vanadium slag tank is transported in time process position, ensure the red heat state of vanadium slag; After vanadium slag tank enters process position, adopt gas gun to carry out heat source gas winding-up heating to vanadium slag, heat source gas is liquefied petroleum gas (LPG) etc., and heat source gas winding-up adopts supersonic speed to control, and vanadium slag temperature controls at 1475 DEG C; After vanadium slag melts completely, stop winding-up heat source gas, add block Wingdale simultaneously and carry out calcification, the add-on of Wingdale is with the CaO/V in vanadium slag
2o
5weight ratio is as the criterion and controls, CaO/V
2o
5weight ratio controls 0.75, and the Task-size Controlling of block Wingdale is between 20 ~ 30mm; Decomposing after melting completely until limestone mine adopts oxygen rifle to carry out oxygen blast to vanadium slag, and oxygen blast Mach number controls at 1.0Ma, and flow of oxygen controls at 300Nm
3/ t vanadium slag.Vanadium slag after process V leaching rate after the vanadium extraction of calcium method wet method reaches 94%.
Embodiment 3
After vanadium-bearing hot metal vanadium extraction terminates, vanadium slag is poured into special vanadium slag tank from converter, and vanadium slag tank is transported in time process position, ensure the red heat state of vanadium slag; After vanadium slag tank enters process position, adopt gas gun to carry out heat source gas winding-up heating to vanadium slag, heat source gas is coal gas of converter, and heat source gas winding-up adopts supersonic speed to control, and vanadium slag temperature controls at 1460 DEG C; After vanadium slag melts completely, stop winding-up heat source gas, add block Wingdale simultaneously and carry out calcification, the add-on of Wingdale is with the CaO/V in vanadium slag
2o
5weight ratio is as the criterion and controls, CaO/V
2o
5weight ratio controls 0.65, and the Task-size Controlling of block Wingdale is between 20 ~ 30mm; After point decomposition melting, adopt oxygen rifle to carry out oxygen blast to vanadium slag until limestone mine, oxygen blast Mach number controls at 0.75Ma, and flow of oxygen controls at 350Nm
3/ t vanadium slag.Vanadium slag after process V leaching rate after the vanadium extraction of calcium method wet method reaches 92%.
Claims (5)
1. vanadium slag oxidation, a calcification processing method, is characterized in that: comprise the following steps:
A, vanadium slag pre-treatment: after vanadium-bearing hot metal vanadium extraction terminates, proceed in vanadium slag tank by vanadium slag, be transferred to rapidly process position;
B, vanadium slag heating and melting: vanadium slag tank heats vanadium slag after moving to process position, ensures vanadium slag temperature >=1450 DEG C;
C, vanadium slag calcification oxidation: after the complete melting of vanadium slag in b step, stop heating, add the calcification of people's Wingdale, after decomposition of limestone melting, adopt oxygen rifle to vanadium slag injecting oxygen;
D, vanadium slag aftertreatment: by the vanadium slag after step c calcification oxidation completely, carry out V after cooling, fragmentation, magnetic separation
2o
5produce.
2. a kind of vanadium slag oxidation according to claim 1, calcification processing method, is characterized in that: adopt gas gun to the heating of vanadium slag winding-up heat source gas in b step, heat source gas adopts supersonic speed to control.
3. a kind of vanadium slag oxidation according to claim 2, calcification processing method, is characterized in that: heat source gas is the one in blast furnace gas, coal gas of converter, liquefied petroleum gas (LPG).
4. a kind of vanadium slag oxidation according to claim 1, calcification processing method, is characterized in that: in step c, the add-on of Wingdale is with V in CaO content in Wingdale and vanadium slag
2o
5content meter, control CaO/V
2o
5=0.55 ~ 0.75; Oxygen blast Mach number controls at 0.5 ~ 1.0Ma, and flow of oxygen controls at 300 ~ 400Nm
3/ t vanadium slag.
5. a kind of vanadium slag oxidation according to claim 4, calcification processing method, is characterized in that: limestone granularity is 20 ~ 30mm, CaO content >=54%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110055371A (en) * | 2019-05-14 | 2019-07-26 | 成都先进金属材料产业技术研究院有限公司 | The method that molten iron production vanadium slag containing sodium directly leaches vanadium extraction |
| CN111041242A (en) * | 2019-12-23 | 2020-04-21 | 吉首大学 | Method for cleanly and efficiently extracting vanadium pentoxide from high-iron high-calcium vanadium-containing ore |
| CN111549241A (en) * | 2019-12-25 | 2020-08-18 | 吉首大学 | Method for extracting vanadium pentoxide from high-iron high-magnesium vanadium-containing ore |
| CN111647758A (en) * | 2020-06-12 | 2020-09-11 | 攀钢集团研究院有限公司 | Method for pretreating and dephosphorizing high-phosphorus vanadium slag |
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| CN102534233A (en) * | 2012-02-10 | 2012-07-04 | 四川省达州钢铁集团有限责任公司 | Vanadium extraction technology of low-grade high-calcium vanadium-containing steel slag |
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| CN102534233A (en) * | 2012-02-10 | 2012-07-04 | 四川省达州钢铁集团有限责任公司 | Vanadium extraction technology of low-grade high-calcium vanadium-containing steel slag |
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| WEN-CHEN SONG .ETC: "Extraction of vanadium from molten vanadium bearing slag by", 《TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110055371A (en) * | 2019-05-14 | 2019-07-26 | 成都先进金属材料产业技术研究院有限公司 | The method that molten iron production vanadium slag containing sodium directly leaches vanadium extraction |
| CN111041242A (en) * | 2019-12-23 | 2020-04-21 | 吉首大学 | Method for cleanly and efficiently extracting vanadium pentoxide from high-iron high-calcium vanadium-containing ore |
| CN111549241A (en) * | 2019-12-25 | 2020-08-18 | 吉首大学 | Method for extracting vanadium pentoxide from high-iron high-magnesium vanadium-containing ore |
| CN111647758A (en) * | 2020-06-12 | 2020-09-11 | 攀钢集团研究院有限公司 | Method for pretreating and dephosphorizing high-phosphorus vanadium slag |
| CN111647758B (en) * | 2020-06-12 | 2022-06-03 | 攀钢集团研究院有限公司 | Method for pretreating and dephosphorizing high-phosphorus vanadium slag |
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