CN102912071B - High-calcium vanadium slag for extracting vanadium by calcium process and method for producing high-calcium vanadium slag - Google Patents
High-calcium vanadium slag for extracting vanadium by calcium process and method for producing high-calcium vanadium slag Download PDFInfo
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Abstract
The invention provides high-calcium vanadium slag for extracting vanadium by a calcium process and a method for producing the high-calcium vanadium slag. The method includes steps of (1), feeding molten iron containing the vanadium into a converter, and adding scale and lime into the converter; (2), blowing oxygen into the converter; (3), performing steel tapping after oxygen blowing is completed to obtain semi-steel for extracting the vanadium; and (4), directly discharging slag or retaining the slag and performing the steps (1), (2) and (3) repeatedly before slag discharge, and obtaining the high-calcium vanadium slag. The high-calcium vanadium slag produced by the method comprises, by weight, from 6% to 10% of CaO, lower than 0.1% of P and from 22% to 24% of iron, and a value of CaO/V2O5 ranges from 0.4 to 0.6. The high-calcium vanadium slag for extracting the vanadium by the calcium process is qualified, and the content of the phosphorus in the vanadium slag is lower than 0.1%. In addition, the metal iron loss ratio in a production process is reduced, and the production cost is obviously lowered. Besides, the produced semi-steel for extracting the vanadium is low in phosphorus content, and dephosphorization burden in a steelmaking process is reduced.
Description
Technical field
The present invention relates to field of steel metallurgy, more particularly, relate to a kind of high calcium vanadium slag for the vanadium extraction of calcium method and production method thereof.
Background technology
In recent years, China starts advocate energetically and develop clearer production technology, and the emphasis that the medium-term and long-term development in science and technology outline of China has been listed in environment protection in supports field, and law enforcement for environmental protection dynamics is being greatly enhanced in recent years.
At present from vanadium slag vanadium extraction what the most often adopt is sodium vanadium extraction (vanadium extraction of sodium method) technique, extract in the production process of barium oxide product (hereinafter claiming the vanadium extraction of sodium method) in sodium method, polluting mainly concentrates on from vanadium slag to vanadium oxide in this hydrometallurgy process, and pollutent mainly contains vanadium extracting waste water and the vanadium-extracted residues of a large amount of ammonia nitrogen and sodium salt.In addition, in traditional sodium process for extracting vanadium, calcium is considered to a kind of harmful element, and the existence of calcium is very big on roasting conversion rate impact, because CaO is easy to V in vanadium slag
2o
5produce the vanadium bronze of water-fast calcium vanadate or calcic, in periodical literature " calcium is on the impact of Leaching of Vanadium from Vanadium slag ", the superfine people of Wang Jin points out, the mass-dispersion of CaO often increases the V that 1% will bring 4.7% ~ 9.0%
2o
5loss, and V
2o
5/ CaO ratio is higher, and influence degree is less, works as V
2o
5when/CaO ratio is less than 9, influence degree is obvious, therefore, the vanadium slag produced at present mainly CaO below 3.0%, CaO/V
2o
5low calcium vanadium slag than less than 0.15, and in the situ production process of low calcium vanadium slag, nearly all steel mill does not all add calcium oxide (CaO), and in addition, in the production of low calcium vanadium slag, the iron-holder of vanadium slag is high, so metallic iron rate of loss is high.
For sodium method vanadium extraction defect, now develop the process for cleanly preparing technology of vanadium slag calcium method vanadium extraction, namely adopt the technique of calcification baking-acidleach to carry out vanadium extraction.This technique solves the pollution problem of sodium vanadium extracting process, and needs high calcium vanadium slag to make raw material, but has strict requirement to the composition of high calcium vanadium slag.Because the phosphorus in high calcium vanadium slag is detrimental impurity, the vanadium recovery of calcium method process for extracting vanadium greatly can be reduced, CaO content, and CaO/V in addition
2o
5weight ratio also have impact to V leaching rate, therefore to the phosphorus content in the high calcium vanadium slag of calcium method roasting, CaO content and CaO/V
2o
5mass ratio have strict requirement.
Summary of the invention
The object of the present invention is to provide a kind of high calcium vanadium slag and the production method thereof that are applicable to calcium method process for extracting vanadium, to reduce the iron level in vanadium slag, reduce the phosphorus content in vanadium slag.
To achieve these goals, the invention provides a kind of production method of calcium method vanadium extraction high calcium vanadium slag, said method comprising the steps of: vanadium-bearing hot metal is blended in converter by (1), add iron scale and lime wherein; (2) then oxygen blast is carried out; (3) oxygen blast is tapped after terminating, and obtains vanadium extraction half steel; (4) directly slag tap or retain after slag proceeds repeatedly aforementioned (1) ~ (3) step and slag tap again, obtaining high calcium vanadium slag.
According to an embodiment of the production method of the high calcium vanadium slag for calcium method process for extracting vanadium of the present invention, in described lime, the weight percent of CaO is 85% ~ 95%.
According to an embodiment of the production method of the high calcium vanadium slag for calcium method process for extracting vanadium of the present invention, described iron scale add-on is 15 ~ 30kg/t
iron, described lime adding amount is 8 ~ 15kg/t
iron.
According to an embodiment of the production method of the high calcium vanadium slag for calcium method process for extracting vanadium of the present invention, the temperature of described vanadium-bearing hot metal is 1200 ~ 1450 DEG C, by weight percentage, described vanadium-bearing hot metal comprises C, the V of 0.2% ~ 0.5% of 3.9% ~ 4.5%, the P of the S of 0.02% ~ 0.10% and 0.06% ~ 0.20%.
According to an embodiment of the production method of the high calcium vanadium slag for calcium method process for extracting vanadium of the present invention, in described oxygen blown step, oxygen supply pressure is 0.4 ~ 0.8MPa, and oxygen flow is 4000 ~ 40000Nm
3/ h, oxygen supply time is 4 ~ 8min.
According to an embodiment of the production method of the high calcium vanadium slag for calcium method process for extracting vanadium of the present invention, the temperature of described vanadium extraction half steel is 1340 ~ 1400 DEG C, by weight percentage, described vanadium extraction half steel comprises the C of 3.4% ~ 4.0%, V, the S of 0.02% ~ 0.10%, the P of 0.054% ~ 0.18% of 0.02% ~ 0.04%.
According to an embodiment of the production method of the high calcium vanadium slag for calcium method process for extracting vanadium of the present invention, described method also comprises the step of described high calcium vanadium slag being carried out to fragmentation, magnetic separation process, and the qualified high calcium vanadium slag of gained is high calcium vanadium slag finished product afterwards.
According to an embodiment of the production method of the high calcium vanadium slag for calcium method process for extracting vanadium of the present invention, described method also comprises the high ferro part high calcium vanadium slag obtained after described fragmentation, magnetic separation step is back in converter the step making vanadium-raising cooling agent.Invention further provides a kind of calcium method vanadium extraction high calcium vanadium slag, described high calcium vanadium slag adopts the production method of above-mentioned calcium method vanadium extraction high calcium vanadium slag to prepare.Wherein, by weight percentage, in described high calcium vanadium slag the content of CaO be 6% ~ 10%, the content of P below 0.1%, iron level is 22% ~ 24%, CaO/V
2o
5value be 0.4 ~ 0.6.
Adopt the production method of calcium method vanadium extraction high calcium vanadium slag provided by the invention, can produce the qualified high calcium vanadium slag being applicable to calcium method process for extracting vanadium, by weight, in gained high calcium vanadium slag, CaO content is 6% ~ 10%, and iron level is 22% ~ 24%, CaO/V
2o
5than being 0.4 ~ 0.6, phosphorus content is below 0.1%; With sodium vanadium extraction with compared with low calcium vanadium slag (containing CaO≤3%), the iron-holder in this high calcium vanadium slag is low by 2% ~ 8%, decreases metallic iron rate of loss, namely improves the rate of recovery of metallic iron in vanadium slag.
Calcium method vanadium extraction high calcium vanadium slag of the present invention is up-to-standard, reduces the phosphorus content in vanadium slag, and decreases metallic iron rate of loss in process of production, significantly reduce production cost.
Accompanying drawing explanation
Fig. 1 is the calcium method vanadium extraction high calcium vanadium slag production technique schematic diagram of exemplary embodiment of the present.
Embodiment
Below, embodiments of the invention are described in detail with reference to figure.
It should be noted that, the half steel of vanadium extraction described in the present invention refers to the molten iron after vanadium extraction, and described lime is also known as unslaked lime, and main component is calcium oxide (CaO).
The invention provides a kind of production method of calcium method vanadium extraction high calcium vanadium slag, said method comprising the steps of:
First vanadium-bearing hot metal is blended in converter, adds iron scale and lime wherein.Because high calcium vanadium slag of the present invention is used for the vanadium extraction of calcium method, so lime can be added in molten iron, iron scale and lime add on the one hand to be make vanadium-raising cooling agent, the phosphorus in part half steel can be removed on the other hand.When dephosphorization under oxidizing atmosphereLin Fenpeibi, CaO itself only fixes agent, and fusing point is higher, need in dephosphorizing process with oxygenant and promotor with the use of.CaO type dephosphorizing agent is extensively studied and is used, and common CaO type dephosphorizing agent is as CaO-P
2o
5-CaF
2-Fe
xo system dephosphorizing agent, CaO-CaF
2-Fe
2o
3be dephosphorizing agent, CaO-Fe
2o
3-CaF
2-BaO system dephosphorizing agent, CaO and FeO is the basal component of the lime slag system for dephosphorization under oxidizing atmosphereLin Fenpeibi, and FeO has promoter action to dephosphorization; In addition, the present invention adds the effect that lime also plays residue adjustment, the iron be conducive in vanadium slag enters in vanadium extraction half steel, iron level thus in vanadium slag reduces, and the iron level in vanadium extraction half steel increases, decrease vanadium extraction by converter blowing process metallic iron rate of loss, improve the rate of recovery of vanadium extraction by converter blowing process metallic iron, achieve extraordinary metallurgical effect.
Preferably, in described lime, the weight percent of CaO is 85% ~ 95%; If CaO content is lower than 85% in lime, then reaches the amount of lime that above-mentioned blowing effect needs to add, vanadium slag V can be caused
2o
5content is low, high calcium vanadium slag CaO/V
2o
5than exceeding claimed range, if higher than 95%, then lime consumption reduces, vanadium slag V
2o
5content improves, high calcium vanadium slag CaO/V
2o
5than lower than claimed range, thus in rear step calcium method vanadium extracting process, need supplementary part lime, vanadium extraction production cost can be increased thus.
In an embodiment of the production method of the high calcium vanadium slag for calcium method process for extracting vanadium of the present invention, the add-on of described iron scale is 15 ~ 30kg/t
iron, the add-on of described lime is 8 ~ 15kg/t
iron.Iron scale and lime adding amount are selected in described scope, mainly guarantee that vanadium extracting process does not produce peroxidation, thus make the half steel carbon content after vanadium extraction in higher level, ensure that lower step semi-steel making process heat is sufficient, semi-steel making is smooth, meanwhile, by the control of iron scale and lime adding amount, the CaO/V of high calcium vanadium slag can be guaranteed
2o
5than the production requirement meeting the vanadium extraction of calcium method.
In an embodiment of the production method of the high calcium vanadium slag for calcium method process for extracting vanadium of the present invention, the temperature of described vanadium-bearing hot metal is 1200 ~ 1450 DEG C, by weight percentage, described vanadium-bearing hot metal comprises C, the V of 0.2% ~ 0.5% of 3.9% ~ 4.5%, the P of the S of 0.02% ~ 0.10% and 0.06% ~ 0.20%.Wherein, the temperature of vanadium-bearing hot metal being controlled at 1200 ~ 1450 DEG C is to ensure that vanadium extraction from hot metal dynamic conditions is abundant, being conducive to vanadium in molten iron to extract.
Then oxygen blast is carried out; Wherein, oxygen supply pressure is 0.4 ~ 0.8MPa, and oxygen flow is 4000 ~ 40000Nm
3/ h, oxygen supply time is 4 ~ 8min.Wherein, oxygen supply pressure and oxygen flow are according to next the choosing of BOF nominal capacity size.The vanadium extraction by converter blowing that nominal capacity is little, adopts lower limit of operation, otherwise, operate by the upper limit; And oxygen supply time is within the scope of this, can ensure higher vanadium oxidation ratio, thus be proposed to enter slag phase by vanadium in molten iron, can ensure that again the loss of half steel oxidation of coal is little, the carbon content of half steel is high, thus provides adequate heat for semi-steel making.
Oxygen blast is tapped after terminating, and after obtaining vanadium extraction half steel, can send converter steelmaking by the vanadium extraction half steel of gained.
In an embodiment of the production method of the high calcium vanadium slag for calcium method process for extracting vanadium of the present invention, in described tapping step, thermometric before tapping, then half steel is poured out from tap hole, the temperature that sampling analysis obtains described vanadium extraction half steel is 1340 ~ 1400 DEG C, by weight percentage, described vanadium extraction half steel comprises the C of 3.4% ~ 4.0%, V, the S of 0.02% ~ 0.10%, the P of 0.054% ~ 0.18% of 0.02% ~ 0.04%.
After tapping, directly slag tap or retain after slag proceeds repeatedly the step of aforementioned vanadium extraction and slag tap again, obtain high calcium vanadium slag.Wherein, adopt many stoves to slag tap and can reduce the loss of vanadium slag, improve the rate of recovery of vanadium slag, preferably, adopt 2 ~ 3 stoves to go out a high calcium vanadium slag; If slag just reaches certain weight after 1 stove, also can directly slag tap.Preferably, before going out high calcium vanadium slag, first vanadium extraction half steel is gone out to the greatest extent, then high calcium vanadium slag is poured into dress vanadium slag container from fire door cool.
In an embodiment of the production method of the high calcium vanadium slag for calcium method process for extracting vanadium of the present invention, described method also comprises the step of described high calcium vanadium slag being carried out to fragmentation, magnetic separation process, the qualified high calcium vanadium slag of gained is high calcium vanadium slag finished product afterwards, calcium method vanadium extraction production line can be sent, as its vanadium extraction raw material by the high calcium vanadium slag finished product of gained.Preferably, described high calcium vanadium slag is cooled to less than 200 DEG C and carries out fragmentation, magnetic separation process again.
In an embodiment of the production method of the high calcium vanadium slag for calcium method process for extracting vanadium of the present invention, described method also comprises the step be back to by the high ferro part high calcium vanadium slag obtained after described fragmentation, magnetic separation step in converter.Wherein, high ferro part high calcium vanadium slag returns in converter makes vanadium-raising cooling agent, and resource is recycled.
Invention further provides a kind of calcium method vanadium extraction high calcium vanadium slag, described high calcium vanadium slag adopts the production method of above-mentioned calcium method vanadium extraction high calcium vanadium slag to prepare.Wherein, by weight percentage, in described high calcium vanadium slag the content of CaO be 6% ~ 10%, the content of P below 0.1%, iron level is 22% ~ 24%, CaO/V
2o
5value be 0.4 ~ 0.6.
The present invention is calcium method vanadium extraction high calcium vanadium slag and the special technology invented, and wherein, in high calcium vanadium slag, CaO content is 6% ~ 10%, and being controlled by CaO content in this scope is because molten iron content of vanadium is generally below 0.5%, like this, in order to control CaO/V
2o
5than being 0.4 ~ 0.6, and for making the P content in high calcium vanadium slag control below 0.1%, then need CaO content in high calcium vanadium slag to control in the scope of 6% ~ 10%, if CaO content is greater than 10%, then the P content in vanadium slag exceeds 0.1%, and CaO/V
2o
5than being greater than 0.6, then during the vanadium extraction of calcium method, vanadium yield will reduce greatly, and production cost improves, decline in benefits; CaO/V
2o
5than the processing parameter of to be 0.4 ~ 0.6 the be vanadium yield optimum determined in calcium method vanadium extracting process.Phosphorus content is controlled be because phosphorus is detrimental impurity below 0.1%, greatly can reduce the vanadium recovery of calcium method process for extracting vanadium, so it is more low better that phosphorus content falls.If phosphorus content controls more than 0.1%, because current calcium method vanadium extraction technology is also in optimizing further, wherein, except P technology does not also reach optimum, thus now calcium method process for extracting vanadium needs high calcium vanadium slag to realize phosphorus content control.
Specifically, exemplary embodiment of the present invention can comprise the following steps:
Be that the vanadium-bearing hot metal of 1200 ~ 1450 DEG C is blended in converter by temperature, then add 15 ~ 30kg/t wherein
ironiron scale and 8 ~ 15kg/t
ironlime; After adding, start oxygen blast vanadium extraction, wherein, oxygen supply pressure is 0.4 ~ 0.8MPa, and oxygen flow is 4000 ~ 40000Nm
3/ h, oxygen supply time is 4 ~ 8min; After oxygen blast terminates, thermometric also pours out vanadium extraction half steel from tap hole, and the vanadium extraction half steel obtained send converter steelmaking; Directly slag tap or retain after slag proceeds repeatedly abovementioned steps and slag tap again, wherein, before going out high calcium vanadium slag, first vanadium extraction half steel is gone out to the greatest extent, again high calcium vanadium slag is poured into dress vanadium slag container from fire door and cool, be cooled to after below 200 DEG C and it is poured out from dress vanadium slag container, then broken also magnetic separation, the high ferro part high calcium vanadium slag obtained returns to vanadium extraction by converter blowing operation, adds in stove and makes refrigerant; The composition of the qualified high calcium vanadium slag obtained is by weight percentage: the content of CaO is 6% ~ 10%, the content of P below 0.1%, iron level is 22% ~ 24%, CaO/V
2o
5value be 0.4 ~ 0.6, the qualified high calcium vanadium slag obtained send calcium method vanadium extraction production line to make vanadium extraction raw material.
Below in conjunction with embodiment, the invention will be further elaborated.Embodiment only for illustration of the present invention, instead of limits the present invention by any way.
Embodiment 1
Be that to be blended into nominal capacity be in the converter of 30t for the vanadium-bearing hot metal (P containing S and 0.12wt% of V, 0.02wt% of C, 0.2wt% of 4.5wt%) of 1200 DEG C by 30t temperature, then add 24kg/t wherein
ironiron scale and 8kg/t
ironlime (containing CaO 85%); After adding, start oxygen blast vanadium extraction, wherein, oxygen supply pressure is 0.4MPa, and oxygen flow is 4000Nm
3/ h, oxygen supply time is 8min; After oxygen blast terminates, thermometric also pours out vanadium extraction half steel from tap hole, and its composition is: [C] 3.4wt%, [V] 0.02wt%, [S] 0.02wt%, [P] 0.11wt%, temperature is 1340 DEG C, converter steelmaking is sent by this vanadium extraction half steel, wherein, vanadium extracting process dephosphorization rate 10%; High calcium vanadium slag to be stayed in stove and is carried out the 2nd stove vanadium extraction operation, after vanadium extraction completes, first vanadium extraction half steel is gone out to the greatest extent, then high calcium vanadium slag is poured into dress vanadium slag container from fire door cool, after being cooled to 200 DEG C, it is poured out from dress vanadium slag container, then broken also magnetic separation, the high ferro part high calcium vanadium slag obtained returns to vanadium extraction by converter blowing operation, adds in stove and makes refrigerant, and the composition of the qualified high calcium vanadium slag obtained is by weight percentage: 10%CaO, 0.04% phosphorus, and CaO/V
2o
5value be 0.4, iron level 22%, the qualified high calcium vanadium slag obtained send calcium method vanadium extraction production line to make vanadium extraction raw material.
Embodiment 2
Be that to be blended into nominal capacity be in the converter of 120t for the vanadium-bearing hot metal (P containing S and 0.06wt% of V, 0.05wt% of C, 0.35wt% of 3.90wt%) of 1280 DEG C by 120t temperature, then add 15kg/t wherein
ironiron scale and 12kg/t
ironlime (containing CaO 85%); After adding, start oxygen blast vanadium extraction, wherein, oxygen supply pressure is 0.7MPa, and oxygen flow is 15000Nm
3/ h, oxygen supply time is 4min; After oxygen blast terminates, thermometric also pours out vanadium extraction half steel from tap hole, and its composition is: [C] 3.7wt%, [V] 0.04wt%, [S] 0.05wt%, [P] 0.05wt%, temperature is 1380 DEG C, send converter steelmaking wherein this vanadium extraction half steel, vanadium extracting process dephosphorization rate 20%; High calcium vanadium slag to be stayed in stove and is carried out the 2nd stove, the 3rd stove vanadium extraction operation, after vanadium extraction completes, first vanadium extraction half steel is gone out to the greatest extent, then high calcium vanadium slag is poured into dress vanadium slag container from fire door cool, after being cooled to 150 DEG C, it is poured out from dress vanadium slag container, then broken also magnetic separation, the high ferro part high calcium vanadium slag obtained returns to vanadium extraction by converter blowing operation, adds in stove and makes refrigerant, and the composition of the qualified high calcium vanadium slag obtained is by weight percentage: 8%CaO, 0.06% phosphorus, and CaO/V
2o
5value be 0.5, iron level 24%, the qualified high calcium vanadium slag obtained send calcium method vanadium extraction production line to make vanadium extraction raw material.
Embodiment 3
Be that to be blended into nominal capacity be in the converter of 200t for the vanadium-bearing hot metal (P containing S and 0.20wt% of V, 0.10wt% of C, 0.5wt% of 4.50wt%) of 1450 DEG C by 200t temperature, then add 30kg/t wherein
ironiron scale and 15kg/t
ironlime (containing CaO 85%); After adding, start oxygen blast vanadium extraction, wherein, oxygen supply pressure is 0.8MPa, and oxygen flow is 40000Nm
3/ h, oxygen supply time is 6min; After oxygen blast terminates, thermometric also pours out vanadium extraction half steel from tap hole, and its composition is: [C] 4.0wt%, [V] 0.04wt%, [S] 0.10wt%, [P] 0.17wt%, temperature is 1400 DEG C, send converter steelmaking wherein this vanadium extraction half steel, vanadium extracting process dephosphorization rate 15%; High calcium vanadium slag to be stayed in stove and is carried out the 2nd stove, the 3rd stove vanadium extraction operation, after vanadium extraction completes, first vanadium extraction half steel is gone out to the greatest extent, then high calcium vanadium slag is poured into dress vanadium slag container from fire door cool, after being cooled to 100 DEG C, it is poured out from dress vanadium slag container, then broken also magnetic separation, the high ferro part high calcium vanadium slag obtained returns to vanadium extraction by converter blowing operation, adds in stove and makes refrigerant, and the composition of the qualified high calcium vanadium slag obtained is by weight percentage: 6%CaO, 0.10% phosphorus, and CaO/V
2o
5value be 0.6, iron level 24%, the qualified high calcium vanadium slag obtained send calcium method vanadium extraction production line to make vanadium extraction raw material.
Adopt the production method of calcium method vanadium extraction high calcium vanadium slag provided by the invention, the qualified high calcium vanadium slag being applicable to calcium method process for extracting vanadium can be produced, by weight percentage, in gained high calcium vanadium slag, the content of CaO is 6% ~ 10%, iron level is 22% ~ 24%, the content of P below 0.1%, CaO/V
2o
5value be 0.4 ~ 0.6; Iron level 26% ~ 30% in low calcium vanadium slag (containing CaO≤3%), in contrast, the iron-holder in high calcium vanadium slag of the present invention is low by 2% ~ 8%, decreases metallic iron rate of loss, namely improves the rate of recovery of metallic iron in vanadium slag.
In sum, calcium method vanadium extraction high calcium vanadium slag of the present invention is up-to-standard, and the phosphorus content in vanadium slag is below 0.1%; And decrease metallic iron rate of loss in process of production, significantly reduce production cost; Meanwhile, in the half steel of gained of the present invention, phosphorus content is few, decreases the dephosphorization burden of steelmaking process.
Claims (7)
1. a production method for calcium method vanadium extraction high calcium vanadium slag, said method comprising the steps of:
(1) vanadium-bearing hot metal is blended in converter, add iron scale and lime wherein, the temperature of described vanadium-bearing hot metal is 1200 ~ 1450 DEG C, by weight percentage, described vanadium-bearing hot metal comprises the P of S and 0.06%-0.20% of V, 0.02%-0.10% of C, 0.2%-0.5% of 3.9% ~ 4.5%, in described lime, the weight percent of CaO is 85% ~ 95%, and the add-on of described lime is 8 ~ 15kg/t
iron, the add-on of described iron scale is 15 ~ 30kg/t
iron;
(2) then oxygen blast is carried out;
(3) oxygen blast is tapped after terminating, and obtains vanadium extraction half steel;
(4) directly slag tap or retain after slag proceeds repeatedly aforementioned (1) ~ (3) step and slag tap again, obtain high calcium vanadium slag, in described high calcium vanadium slag, the content of CaO is that 6% ~ 10%, P content is below 0.1%, iron level is 22% ~ 24%, CaO/V
2o
5value be 0.4 ~ 0.6.
2. the production method of calcium method vanadium extraction high calcium vanadium slag according to claim 1, is characterized in that, in described oxygen blown step, oxygen supply pressure is 0.4 ~ 0.8MPa, and oxygen flow is 4000 ~ 40000Nm
3/ h, oxygen supply time is 4 ~ 8min.
3. the production method of calcium method vanadium extraction high calcium vanadium slag according to claim 1, it is characterized in that, the temperature of described vanadium extraction half steel is 1340 ~ 1400 DEG C, by weight percentage, described vanadium extraction half steel comprises the P of S, 0.054%-0.18% of V, 0.02%-0.10% of C, 0.02%-0.04% of 3.4% ~ 4.0%.
4. the production method of calcium method vanadium extraction high calcium vanadium slag according to claim 1, it is characterized in that, described method also comprises the step of described high calcium vanadium slag being carried out to fragmentation, magnetic separation process, and the qualified high calcium vanadium slag of gained is high calcium vanadium slag finished product afterwards.
5. the production method of calcium method vanadium extraction high calcium vanadium slag according to claim 4, is characterized in that, described method also comprises the high ferro part high calcium vanadium slag obtained after described fragmentation, magnetic separation step is back in converter the step making vanadium-raising cooling agent.
6. a calcium method vanadium extraction high calcium vanadium slag, is characterized in that, described high calcium vanadium slag adopts the production method preparation of the calcium method vanadium extraction high calcium vanadium slag according to any one of claim 1 to 5.
7. calcium method vanadium extraction high calcium vanadium slag according to claim 6, is characterized in that, by weight percentage, in described high calcium vanadium slag the content of CaO be 6% ~ 10%, the content of P below 0.1%, iron level is 22% ~ 24%, CaO/V
2o
5value be 0.4 ~ 0.6.
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| CN109252011A (en) * | 2018-11-26 | 2019-01-22 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of vanadium-raising cooling agent and preparation method thereof and extraction vanadium method |
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| CN101215619A (en) * | 2008-01-03 | 2008-07-09 | 攀钢集团攀枝花钢铁研究院 | Method for extracting vanadium and removing phosphorus from vanadium-containing molten iron and steel-smelting technique using the same method |
| CN101280351A (en) * | 2008-05-22 | 2008-10-08 | 王荣春 | Production method of vanadium slag |
| CN101412539A (en) * | 2008-11-18 | 2009-04-22 | 攀钢集团研究院有限公司 | Clean production process for vanadium oxide |
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| CN101215619A (en) * | 2008-01-03 | 2008-07-09 | 攀钢集团攀枝花钢铁研究院 | Method for extracting vanadium and removing phosphorus from vanadium-containing molten iron and steel-smelting technique using the same method |
| CN101280351A (en) * | 2008-05-22 | 2008-10-08 | 王荣春 | Production method of vanadium slag |
| CN101412539A (en) * | 2008-11-18 | 2009-04-22 | 攀钢集团研究院有限公司 | Clean production process for vanadium oxide |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109252011A (en) * | 2018-11-26 | 2019-01-22 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of vanadium-raising cooling agent and preparation method thereof and extraction vanadium method |
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