CN104694694B - A kind of method that vanadium chromium is extracted in converter - Google Patents
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Abstract
The present invention relates to a kind of method that vanadium chromium is extracted in converter, belongs to field of iron and steel smelting.The technical problem to be solved in the present invention is to provide a kind of method that vanadium chromium is extracted in converter.The method that vanadium chromium is extracted in converter of the present invention, comprises the steps：Vanadium chromium hot melt is blended into converter, top blast is by O in vanadium chromium hot melt2And CO2The mixed gas of composition, meanwhile, bottom blowing is carried out with CO, add coolant to control the temperature of vanadium chromium hot melt at 1320～1390 DEG C, obtain vanadium chromium slag and half steel during top and bottom complex blowing；Wherein, coolant is added in three times：Oxygen rifle declines the coolant for adding 20%～40% in place, after successful ignition, adds 30%～50% coolant, addition during at least 2min before blowing is stopped of remaining coolant after 1～2.5min of blowing.The present invention with ensure that higher vanadium oxygenation efficiency, it is ensured that the oxygenation efficiency of chromium, reduce carbon oxygenation efficiency, be conducive to the comprehensive utilization of resource.
Description
Technical field
The present invention relates to a kind of method that vanadium chromium is extracted in converter, belongs to field of iron and steel smelting.
Background technology
China is vanadium titano-magnetite big country, is mainly distributed on the areas such as Panxi, Sichuan, Chengde；According to Cr2O3Content
Just, vanadium titano-magnetite is divided into plain edition vanadium titano-magnetite and high-chromic vanadium-titanium ferroferrite (abbreviation high chromium vanadium titanium octahedral iron ore) again.
High-chromic vanadium-titanium ferroferrite is also associated with preciousness in addition to containing ferrum, vanadium, titanium as a kind of special v-ti magnetite ore resources
Chromium resource, the red lattice vanadium titano-magnetite of Panzhihua Region is the maximum chromium ore resource of China, and 3,600,000,000 tons of reserves, containing Cr2O3Up to
18000000 tons, be the nearly twice of other areas national proved reserves.
The red lattice vanadium titano-magnetite of chromium type high be not only climb the big mining area in Xisi most, and domestic v-ti magnetite maximum at present
Ore deposit mineral deposit.Storage of mineral deposits divides different Granitic Complex in the huge stratiform that early Hercynian period is formed like stratiform neutral and alkali mafic Ultrabasic
In, magmatic differentiation is good, belongs to late magmatic crystallization-differentiation deposit.Ore body forms the big-and-middle-sized mining area in relatively independent 8, wherein
The withered mining area rock mass thickness in road is big, and all kinds of ledges are complete, and ore body scale is big, studies degree highest, the i.e. alleged " Hongge Deposit in the area
Area ", is divided into " southern mining area " and " northern mining area " again.Different from resources such as the mining heritages of periphery, Baima ore deposits, Hongge Deposit is removed and is rich in
Outside the metals such as ferrum, vanadium, titanium, the also metal such as association chromium, nickel, cobalt altogether is China's super-huge multielement mineral intergrowth few in number, tool
There is very high comprehensive utilization value.By taking the chromium of association as an example, red Ge Nan mining areas Cr2O3Grade up to 0.34%, chromium resource reserves
Very considerable.China is the big rustless steel manufacturing country of the first in the world, and domestic chrome ore much can not meet consumption demand, every year all need to be from
The high-grade chromite of external import and ferrochrome.The chromium metallurgy and chromic salts industry of China has very high to external chromite
Dependency degree.Therefore, for the country of the such a chromium resource shortage of China, chromium resource in high-chromic vanadium-titanium ferroferrite is realized
Scale reclaim there is highly important economic worth and strategic importance.
At present, the production method for producing vanadium slag both at home and abroad is more, mainly has New Zealand's ladle to blow vanadium technique, South Africa shaking ladle
Process for extracting vanadium, Russian and Chinese vanadium extraction by converter blowing technique etc., other process for extracting vanadium also include v-bearing steel slag vanadium extraction, extracting vanadium from stone coal
Technique etc..The production process system of vanadium extraction by converter blowing is constantly changing for addition coolant+process temperature+duration of blast both at home and abroad
Enter.Vanadium extraction from hot metal is a selective oxidation technology.Converter supply vanadium extraction is an exothermic process, [Si], [Mn], [V], [C]
Make molten bath be rapidly heated Deng element oxide, and [Si], [Mn] oxidation occurred before [V] is aoxidized, vanadium extraction can not possibly suppress which anti-
Should, and therefore [C], [V] conversion temperature will obtain the high oxidation rate and [V] yield of [V] about at 1385 DEG C or so, it is necessary to plus
Enter vanadium-raising cooling agent, control bath temperature is allowed to approach [C], [V] conversion temperature, reaches the purpose that carbon is protected in vanadium extraction, [V] is down to
Less than 0.05%.The terminal half steel temperature of vanadium extraction is unsuitable too high, and based on vanadium oxidation, the later stage is reduced to vanadium extracting process early stage with vanadium
Main, but to blow vanadium process be based on vanadium reduction.Molten iron temperature is made to drop to suitably so using addition coolant in cooling
Scope, by the control of duration of blast and process temperature in converter smelting, the vanadium in half steel is aoxidized, improves recovery rate.
The high lattice vanadium titano-magnetite mineral species of Flos Bombacis Malabarici are more, and ore structures are complicated, select smelting separate the ferrum in Ore, vanadium,
The alloying technology such as titanium, chromium, nickel, cobalt difficulty is big, is a worldwide technological puzzle to be captured.Under normal circumstances, schreyerite thing
Middle vanadium is with V3+Form be solid-solution in magnetic iron ore lattice, formed vanadium iron spinelle；Titanium is mainly with oxide TiO2In the form of
In ulvite and ilmenite.Cr3+With Fe3+Ionic radius is approximate, ferric ion in trivalent chromium displacement titanomagnetite, is in
Endoplasm with as.As vanadium, together with ferrum symbiosis, mineral are FeO (V, Cr) to chromium2O3Spinelle.In ore dressing process chromium with
Vanadium more than 80% is enriched in iron ore concentrate.It is to extract jointly vanadium chromium by metallurgical method to have established preferable raw material basis.Many
Colleges and universities have all done substantial amounts of work to Hongge Deposit from selecting and purchasing, smelting, extraction and follow-up vanadium chromium separation in one's power for Research Center, establish
Certain theory and practice basis.Capture multiple technical barriers at present, but also have many key technology bottles away from industrialization
Neck, Technology are still immature.
Thermodynamic behaviors of the Dong Pengli to chromium, vanadium and its oxide in slag has carried out theory analysis, finds chromium and vanadium
And its thermodynamic behavior of oxide is depending on the partial pressure of oxygen in process of the test, temperature, basicity and slag phase composition.With basicity,
Partial pressure of oxygen increase and temperature reduce, Cr2+Content reduces；With the increase of basicity of slag, dissolubility of the chromium oxide in slag reduces, oxygen
The reduction of compound activity (Dong Pengli. the thermodynamic behavior [J] of chromium, vanadium and its oxide in steelmaking process. China rare earth journal,
2012,30 (S1):49-54.).
The adopted ore dressing → rotary kiln prereduction electric furnace ironmaking → experimental converter of former Ministry of Geology and Mineral Resources's mineral products comprehensive utilizating research
Blow chromium type high vanadium slag → from chromium type high vanadium slag extract V2O5And Cr2O3, then two have been obtained through traditional Roasting And Leaching sedimentation method
Product is planted, vanadic anhydride grade and chromic oxide grade are respectively greater than 90% and 98%, receive from the synthesis of raw ore to product
Yield：Ferrum 65%, vanadium 40%～52%, chromium 40%～55%.(Zhang Jianting. the preservation of Hongge iron ore chromium, distribution and recycling
[J]. Sichuan non-ferrous metal, 2005, (1):1-5.)
Pan Yan institutes in Iron Ore Powder directly with soda and Natrii Sulfas compound oxidizing roastings first extract vanadium chromium, leach after concentrate
Vanadium, chromium precipitation is extracted from solution with shaft furnace gas reduction magnetic separation separation, simple precipitation method, and have studied various impurity to vanadium
Chromium precipitation and the affecting laws of product quality, have finally given the V of grade both greater than 98%2O5And Cr2O3Product (Zhang Jianting, old
Green. climb western vanadium titano-magnetite essential element occurrence status and recycle [J]. mineral products protection and utilization, 2008, (5):38-
41.).
2012 Nian Pan steel groups take Hongge Deposit → rotary hearth furnace prereduction → electric furnace to melt point → technique the stream of induction furnace blowing
Journey is extracted chromium type high vanadium slag to Hongge Deposit and has carried out experimental study, has obtained containing V2O3About 8%, Cr2O3About 8% high-chromic vanadium
Slag and contain TiO2The higher Ti-enriched slag of grade, this technique are extracted while presenting preferable based on third generation ironmaking technology
With the prospect for separating vanadium, titanium, chromium, ferrum.
In existing blast furnace ironmaking-pneumatic steelmaking process for extracting vanadium, the titanium in vanadium titano-magnetite is mainly with perovskite form
Enter blast furnace slag phase, vanadium, chromated oxide are reduced entrance iron phase, and during vanadium extraction by converter blowing oxidized formed respectively vanadium iron,
The spinel structure of ferrochrome enters slag phase and forms vanadium slag, and remaining in the vanadium chromium in half steel can part in further steelmaking process
Oxidation is entered in the steelmaking slag of high alkalinity.As current molten iron chromium content is low, production technology is adopted just for the recovery of Vanadium in Vanadium Residue
Technique is high temperature sodium roasting-water logging process for extracting vanadium.Similar due to physical chemistry behavior of the vanadium chromium in metallurgical process
Property, in the vanadium chromium hot melt vanadium extracting process with Hongge Deposit as raw material substantial amounts of chromium oxidation certainly will enter in slag, form high chromium and contain
The vanadium chromium slag of amount.
From the point of view of existing document, only a small amount of commerical test report is smelted with regard to vanadium chromium hot melt, due to the ginseng for having chromium
With oxidation characteristic of the containing vanadium and chromium molten iron in converter can accordingly be varied from, and presence of the chromated oxide in slag can affect vanadium chromium
The physical and chemical performance of slag, the change that the thermodynamic condition and vanadium chromium of the oxidation of vanadium chromium can be caused to distribute in slag and in half steel.
The Chinese patent application of Publication No. CN1789435 discloses a kind of vanadium extraction from hot metal control calcium coolant and vanadium extraction from hot metal
Calcium technique is controlled, the chemical composition (Wt%) of its vanadium-raising cooling agent is：Iron scale 56～60%, fine iron breeze 30～40%, knot
Mixture 5～10%, the coolant can increase the extraction ratio and v slag grade of vanadium, stable vanadium slag calcium oxide content.
The Chinese patent application of Publication No. CN101338351 discloses a kind of vanadium-raising cooling agent and preparation method thereof and makes
With method, the coolant with iron scale or vanadium extraction sludge, concentrate containing vanadium iron, bonding agent as raw material production, containing 80%-95%
Iron oxides, 3～6% SiO2, 0.1～0.6% V2O5, 1～3%MgCl2.
From in terms of above-mentioned prior art, extraction vanadium chromium is carried out using combined blown converter and yet there are no report, still belong to precedent.
Content of the invention
The technical problem to be solved in the present invention is to provide a kind of method that vanadium chromium is extracted in converter.
The method that vanadium chromium is extracted in converter of the present invention, comprises the steps：Vanadium chromium hot melt is blended into converter, to vanadium chromium hot melt
Middle top blast is by O2And CO2The mixed gas of composition, meanwhile, bottom blowing is carried out with CO, add coolant during top and bottom complex blowing
The temperature of control vanadium chromium hot melt obtains vanadium chromium slag and half steel at 1320～1390 DEG C；Wherein, mixed gas consumption be 10～
30Nm3/ tFe, mixed gas are blown using oxygen rifle；Coolant is added in three times：Oxygen rifle declines in place, add after successful ignition
20%～40% coolant, adds 30%～50% coolant after 1～2.5min of blowing, remaining coolant is stopping blowing
Add during at least 2min before refining.
Wherein, in the vanadium chromium hot melt total amount of [V]+[Cr] 0.5～1.0%, carbon content is 4.0～5.0%.
Further, preferably, in the mixed gas, by volume, O2:CO2=3～8:1；Preferably,
O2:CO2=5:1.
Preferably, the mixture pressure is 0.60～1.0MPa, and flow is 8000～25000Nm3/ h, mixed gas
Consumption is preferably 25Nm3/tFe.
Preferably, the mixed gas are blown using oxygen rifle.
Further, the coolant is preferably iron oxides or oxides-containing iron, and the addition of coolant is preferably 15
～35kg/tFe, more preferably 25kg/tFe.
Preferably, the addition opportunity of the coolant be：Oxygen rifle declines in place, add after successful ignition.
Used as further preferred scheme, coolant is added in three times, oxygen rifle decline in place, add 20% after successful ignition～
40% coolant, adds 30%～50% coolant after 1～2.5min of blowing, remaining coolant before blowing is stopped extremely
Add during few 2min.
Preferably, during oxygen rifle injection mixed gas, 0.5～1.0min of Primary period adopts high rifle position, mid-term to adopt low rifle
Position, before finishing blowing, 1～1.5min adopts high rifle position；Total injection time control is in 6～12min.
Further, preferably, bottom blowing CO is during blowing.
Further, preferably, during blowing, the consumption of bottom blowing CO is 0.15～0.55m3/ (min tFe),
Preferably 0.25～0.40m3/(min·tFe).
Beneficial effect of the present invention：
1st, the present invention with ensure that higher vanadium oxygenation efficiency, while the difficulty for overcoming carbon chromium inversion temperature low, it is ensured that chromium
Oxygenation efficiency, reduce carbon oxygenation efficiency, be conducive to the comprehensive utilization of resource.
2nd, oxidation of coal rate can be greatly reduced using the inventive method.
Specific embodiment
The method that vanadium chromium is extracted in converter of the present invention, comprises the steps：Vanadium chromium hot melt is blended into converter, to vanadium chromium hot melt
Middle top blast is by O2And CO2The mixed gas of composition, meanwhile, bottom blowing is carried out with CO, add coolant during top and bottom complex blowing
The temperature of control vanadium chromium hot melt obtains vanadium chromium slag and half steel at 1320～1390 DEG C；Wherein, mixed gas consumption be 10～
30Nm3/ tFe, mixed gas are blown using oxygen rifle；Coolant is added in three times：Oxygen rifle declines in place, add after successful ignition
20%～40% coolant, adds 30%～50% coolant after 1～2.5min of blowing, remaining coolant is stopping blowing
Add during at least 2min before refining.
Wherein, in the vanadium chromium hot melt total amount of [V]+[Cr] 0.5～1.0%, carbon content 4.0～5.0%, remaining
Composition is without particular/special requirement.Vanadium chromium hot melt of the present invention can be obtained through blast furnace or electric furnace smelting by high chromium vanadium titanium octahedral iron ore.
Further, preferably, in the mixed gas, by volume, O2:CO2=3～8:1；Preferably,
O2:CO2=5:1.
Preferably, the mixture pressure is 0.60～1.0MPa, and flow is 8000～25000Nm3/ h, mixed gas
Consumption is preferably 25Nm3/tFe.
Preferably, the mixed gas are blown using oxygen rifle.
Further, the coolant is preferably iron oxides or oxides-containing iron, and the addition of coolant is preferably 15
～35kg/tFe, more preferably 25kg/tFe.
Preferably, the addition opportunity of the coolant be：Oxygen rifle declines in place, add after successful ignition.
Used as further preferred scheme, coolant is added in three times, oxygen rifle decline in place, add 20% after successful ignition～
40% coolant, adds 30%～50% coolant after 1～2.5min of blowing, remaining coolant before blowing is stopped extremely
Add during few 2min；Preferably, remaining coolant stop blowing before 2min when add.
Wherein, it is to control molten iron temperature below 1320 DEG C to add coolant after igniting success, at this temperature can be with
Effectively improve the oxygenation efficiency of chromium；With oxidation enter trip temperature raise after add 30%～50% coolant control temperature exist
1320～1350 DEG C；To before finishing blowing in order to ensure half steel temperature between 1320～1390 DEG C, remaining coolant is added.
Further, preferably, when oxygen rifle blows mixed gas, rifle position is controlled using " high-low-high " pattern,
When i.e. oxygen rifle is blown mixed gas, 0.5～1.0min of Primary period adopts high rifle position, and mid-term adopts low rifle position, 1 before finishing blowing
～1.5min adopts high rifle position；Total injection time control is in 6～12min.
High rifle position is defined in molten metal surface impacts area with oxygen rifle jet with low rifle position, and impact area is 35%
It is high rifle position when～50%, impact area is low rifle position at 25%～35%, therefore, because BOF nominal capacity, the type of furnace, oxygen
The difference of rifle oxygen supply parameter, distance of the high and low rifle position apart from molten metal surface is also different.According to molten iron during actual production
Amount, molten metal surface size, oxygen supply by lance parameter carry out distance of the rifle position apart from molten metal surface and calculate.
Early stage is to react with molten iron upper surface in order to oxygen using high rifle position, now needs to control the too fast rising of temperature,
High rifle position can ensure that and produce more FeO simultaneously, accelerates reaction for mid-term and provides oxygen source；Mid-term is mainly increased using low rifle position
The mixing power of strong molten iron, accelerates the reaction of molten iron and oxygen；Later stage is in order to control outlet temperature, while can be with using high rifle position
Reduce the oxidation of carbon.
Further, preferably, bottom blowing CO is during blowing.
Further, preferably, during blowing, the consumption of bottom blowing CO is 0.15～0.55m3/ (min tFe),
Preferably 0.25～0.40m3/(min·tFe).
Melting bath stirring can be strengthened using aforesaid way bottom blowing CO, while CO partial pressures in stove can be increased, reduced in molten iron
Oxidation of coal rate.
Further, in said method, gained half steel is transported to steelmaking converter and is made steel.
The specific embodiment of the present invention is further described with reference to embodiment, not therefore by present invention limit
System is among described scope of embodiments.
Embodiment 1
After 80t converter iron makings terminate, gaseous mixture, O are supplied using oxygen rifle2With CO2Ratio be 3:1；Oxygen rifle decline in place,
40% coolant is added after successful ignition, and coolant is the coolant of iron oxides or oxides-containing iron, after blowing 2.5min
Add 50% coolant, add during 2min before blowing is stopped of last 10% coolant, oxygen blow duration is controlled in 6min；
When oxygen rifle blows gaseous mixture, rifle position is controlled using " high-low-high " pattern, i.e. Primary period 1.0min adopts the high rifle positions of 1.6m
(i.e. oxygen rifle is apart from molten iron level 1.6m), mid-term adopt the low rifle positions of 1.5m (i.e. oxygen rifle is apart from molten iron level 1.5m), finishing blowing
Front 1.0min adopts the high rifle positions of 1.6m (i.e. oxygen rifle is apart from molten iron level 1.6m)；Capacity mixture pressure according to converter is
0.60MPa, flow-control are in 8000Nm3/ h, gaseous mixture consumption are 10Nm3/tFe；Coolant consumption control 15kg/tFe it
Between；0.55m is adopted during blowing3The bottom blowing intensity of/(min tFe) carries out CO supply；Smelting goes out half steel and vanadium after terminating respectively
Chromium slag, gained half steel are transported to steelmaking converter and are made steel.Molten iron vanadium drops to 0.036% from 0.210%, and chromium is dropped to from 0.205%
0.102%, oxidation of coal rate is 5.1%.
Embodiment 2
After 200t converter iron makings terminate, gaseous mixture, O are supplied using oxygen rifle2With CO2Ratio be 8:1；Oxygen rifle decline in place,
20% coolant is added after successful ignition, and coolant is the coolant of iron oxides or oxides-containing iron, after blowing 1min again
Add 50% coolant, add during 2min before blowing is stopped of last 30% coolant, oxygen blow duration is controlled in 12min；
When oxygen rifle blows gaseous mixture, rifle position is controlled using " high-low-high " pattern, i.e. Primary period 0.5min adopts the high rifle positions of 2.2m
(i.e. oxygen rifle is apart from molten iron level 2.2m), mid-term adopt the low rifle positions of 1.8m (i.e. oxygen rifle is apart from molten iron level 1.8m), finishing blowing
Front 1.5min adopts the high rifle positions of 2.0m (i.e. oxygen rifle is apart from molten iron level 2.0m)；Capacity mixture pressure according to converter
1.0MPa, flow-control are in 25000Nm3/ h, gaseous mixture consumption are 30Nm3/tFe；Coolant consumption control 35kg/tFe it
Between；0.15m is adopted during blowing3The bottom blowing intensity of/(min tFe) carries out CO supply；Smelting goes out half steel and vanadium after terminating respectively
Chromium slag, gained half steel are transported to steelmaking converter and are made steel.Molten iron vanadium drops to 0.042% from 0.331%, and chromium is dropped to from 0.453%
0.174%, oxidation of coal rate is 8.1%.
Embodiment 3
After 140t iron makings terminate, gaseous mixture, O are supplied using oxygen rifle2With CO2Ratio be 5:1；Oxygen rifle declines in place, successfully
30% coolant is added after igniting, and coolant is the coolant of iron oxides or oxides-containing iron, adds after blowing 2.5min again
Enter 40% coolant, finally remaining coolant stop blowing before 2min when add, oxygen blow duration control in 10min；Oxygen
When rifle blows gaseous mixture, rifle position is controlled using " high-low-high " pattern, i.e. Primary period 1.0min adopts the high rifle positions of 1.9m (i.e.
Oxygen rifle is apart from molten iron level 1.9m), mid-term adopts the low rifle positions of 1.7m (i.e. oxygen rifle is apart from molten iron level 1.7m), before finishing blowing
1.5min adopts the high rifle positions of 1.9m (i.e. oxygen rifle is apart from molten iron level 1.9m)；Capacity mixture pressure 0.85MPa according to converter,
Flow-control is in 16000Nm3/ h, gaseous mixture consumption are 25Nm3/tFe；Coolant consumption is controlled between 25kg/tFe；Blowing process
Between adopt 0.35m3The bottom blowing intensity of/(min tFe) carries out CO supply；Smelting goes out half steel and vanadium chromium slag, gained respectively after terminating
Half steel is transported to steelmaking converter and is made steel.Molten iron vanadium drops to 0.041% from 0.271%, and chromium drops to 0.182% from 0.521%, carbon
Oxygenation efficiency is 7.2%.
Comparative example 1
According to the method for embodiment 2, except that, containing vanadium and chromium molten iron and coolant are disposably added in converter.
The vanadium of containing vanadium and chromium molten iron drops to 0.568% from 0.310%, and chromium drops to 0.19% from 0.421%, and oxidation of coal rate is 17.5%.
Claims (17)
1. a kind of method that vanadium chromium is extracted in converter, it is characterised in that comprise the steps：Vanadium chromium hot melt is blended into converter, to
In vanadium chromium hot melt, top blast is by O2And CO2The mixed gas of composition, meanwhile, bottom blowing is carried out with CO, add during top and bottom complex blowing
Coolant obtains vanadium chromium slag and half steel controlling the temperature of vanadium chromium hot melt at 1320～1390 DEG C；Wherein, mixed gas consumption is
10～30Nm3/ tFe, mixed gas are blown using oxygen rifle；Coolant is added in three times：Oxygen rifle decline in place, after successful ignition plus
Enter 20%～40% coolant, after 1～2.5min of blowing, add 30%～50% coolant, remaining coolant is stopping
Add during at least 2min before blowing；
Wherein, during oxygen rifle injection mixed gas, high rifle position, mid-term is adopted to blow using low rifle position in 0.5～1.0min of Primary period
Refining terminates front 1～1.5min using high rifle position；In 6～12min, bottom blowing CO is during blowing to total injection time control.
2. the method that vanadium chromium is extracted in converter according to claim 1, it is characterised in that：[V]+[Cr] in the vanadium chromium hot melt
Total amount 0.5～1.0%, carbon content is 4.0～5.0%.
3. the method that vanadium chromium is extracted in converter according to claim 1 and 2, it is characterised in that：In the mixed gas, by body
Product ratio, O2:CO2=3～8:1.
4. the method that vanadium chromium is extracted in converter according to claim 1 and 2, it is characterised in that：In the mixed gas, by body
Product ratio, O2:CO2=5:1.
5. the method that vanadium chromium is extracted in converter according to claim 1 and 2, it is characterised in that：The mixed gas consumption is
25Nm3/ tFe, the mixture pressure are 0.60～1.0MPa, and flow is 8000～25000Nm3/h.
6. the method that vanadium chromium is extracted in converter according to claim 3, it is characterised in that：The mixed gas consumption is
25Nm3/ tFe, the mixture pressure are 0.60～1.0MPa, and flow is 8000～25000Nm3/h.
7. the method that vanadium chromium is extracted in converter according to claim 4, it is characterised in that：The mixed gas consumption is
25Nm3/ tFe, the mixture pressure are 0.60～1.0MPa, and flow is 8000～25000Nm3/h.
8. the method that vanadium chromium is extracted in the converter according to 1,2,6 or 7 any one of claim, it is characterised in that：The cooling
Agent is oxides-containing iron, and the addition of coolant is 15～35kg/tFe.
9. the method that vanadium chromium is extracted in converter according to claim 3, it is characterised in that：The coolant is aoxidized for iron content
Thing, the addition of coolant is 15～35kg/tFe.
10. the method that vanadium chromium is extracted in converter according to claim 4, it is characterised in that：The coolant is aoxidized for iron content
Thing, the addition of coolant is 15～35kg/tFe.
The method that vanadium chromium is extracted in 11. converters according to claim 5, it is characterised in that：The coolant is aoxidized for iron content
Thing, the addition of coolant is 15～35kg/tFe.
The method that vanadium chromium is extracted in 12. converters according to 1,2,6 or 7 any one of claim, it is characterised in that：The cooling
Agent is oxides-containing iron, and the addition of coolant is 25kg/tFe.
The method that vanadium chromium is extracted in 13. converters according to claim 3, it is characterised in that：The coolant is aoxidized for iron content
Thing, the addition of coolant is 25kg/tFe.
The method that vanadium chromium is extracted in 14. converters according to claim 4, it is characterised in that：The coolant is aoxidized for iron content
Thing, the addition of coolant is 25kg/tFe.
The method that vanadium chromium is extracted in 15. converters according to claim 5, it is characterised in that：The coolant is aoxidized for iron content
Thing, the addition of coolant is 25kg/tFe.
The method that vanadium chromium is extracted in 16. converters according to claim 1, it is characterised in that：During blowing, the consumption of bottom blowing CO
For 0.15～0.55m3/(min·tFe).
The method that vanadium chromium is extracted in 17. converters according to claim 1, it is characterised in that：During blowing, the consumption of bottom blowing CO
For 0.25～0.40m3/(min·tFe).
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| CN103952517A (en) * | 2014-04-24 | 2014-07-30 | 攀钢集团攀枝花钢铁研究院有限公司 | Treatment method for water containing vanadium, chromium and iron and smelting process for high chromium vanadium titanium magnetite concentrate |
| CN103966392A (en) * | 2014-05-05 | 2014-08-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium through top-bottom combined blowing converter |
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