CN103031484A - Method for smelting vanadium iron - Google Patents
Method for smelting vanadium iron Download PDFInfo
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- CN103031484A CN103031484A CN2011102936440A CN201110293644A CN103031484A CN 103031484 A CN103031484 A CN 103031484A CN 2011102936440 A CN2011102936440 A CN 2011102936440A CN 201110293644 A CN201110293644 A CN 201110293644A CN 103031484 A CN103031484 A CN 103031484A
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Abstract
The present invention provides a method for smelting vanadium iron, comprising the steps of: (1) contacting a raw material including quick lime, iron and a vanadium oxide and aluminum under the conditions of the first thermite reaction to obtain a first alloy liquid and a first slag; wherein the amount of aluminum used is 0.75-0.9 moles relative to per mole of oxygen in the vanadium oxide, and the total vanadium content is not higher than 0.2 wt% in the first slag resulted from the first thermite reaction conditions; (2) contacting the first alloy liquid and the slag including iron oxides and quick lime and without vanadium oxide under the conditions of the second thermite reaction to obtain a second alloy liquid and a second slag; wherein the aluminum element content in the second alloy liquid is not more than 1.5 wt% and the total vanadium content in the second slag is not more than 0.8 wt% resulted from the second thermite reaction conditions. By the method, the technical solution provided by the present invention effectively improves the recovery rate of vanadium.
Description
Technical field
The present invention relates to a kind of method of metal smelting, particularly, relate to a kind of method of smelting ferrovanadium.
Background technology
Vanadium iron is the iron alloy that vanadium and iron form, and mainly is used as alloy addition in steel-making, and high vanadium vanadium iron also is used as the additive of non-ferrous alloy.Vanadium iron commonly used has three kinds of the vanadium of containing 40 quality %, 60 quality % and 80 quality %.
The method of smelting ferrovanadium comprises: in electric arc furnace, unslaked lime, barium oxide, iron and aluminium as raw material, are obtained vanadium iron through reduction and two stage refinings of refining; Wherein, in reduction phase, under high unslaked lime slag, barium oxide and aluminium generation thermite reaction restore vanadium.When reduction phase proceeds to total content of vanadium in the slag and is not higher than 0.2 % by weight, emit reduced blast furnace.Then, add barium oxide and lime again, carry out refining stage, to remove the aluminium in the ferro-vanadium liquid, ferro-vanadium liquid composition is emitted refinery scum after reaching the expection requirement, obtains the ferro-vanadium product.Refinery scum contains the above total vanadium of 3 % by weight, is called rich slag.
The generation of rich slag has reduced the rate of recovery of vanadium, that is, there is the lower defective of the rate of recovery of vanadium in the method for above-mentioned smelting ferrovanadium.
Summary of the invention
The objective of the invention is to exist for the method that overcomes smelting ferrovanadium the lower defective of the rate of recovery of vanadium, provide a kind of vanadium recovery higher smelting ferrovanadium method.
The present inventor finds, can use the residue adjustment material contain ferriferous oxide and unslaked lime and not contain barium oxide to carry out residue adjustment at refining stage, thereby do not produce the rich slag that contains the above total vanadium of 3 % by weight and the rate of recovery that has improved vanadium, obtained thus the present invention.
The invention provides a kind of method of smelting ferrovanadium, the method comprises the steps:
(1) will comprise that the raw material of unslaked lime, iron and barium oxide contacts under the first thermite reaction condition with aluminium, obtains the first aluminium alloy and the first slag; With respect to every mole oxygen element in the described barium oxide, the consumption of aluminium is the 0.75-0.9 mole; Described the first thermite reaction condition so that in the first slag the content of total vanadium be not higher than 0.5 % by weight;
(2) described the first aluminium alloy is contacted under the second thermite reaction condition with the residue adjustment material that contains ferriferous oxide with unslaked lime and do not contain barium oxide, obtain the second aluminium alloy and the second slag; Described the second thermite reaction condition so that in described the second aluminium alloy the content of aluminium element be not higher than 1.5 % by weight, and the content of total vanadium is not higher than 0.8 % by weight in described the second slag.
By aforesaid method, the technical scheme of the smelting ferrovanadium that provides of the present invention has been avoided the generation of rich slag, thereby has effectively simplified technique, has reduced energy consumption, improved the rate of recovery of vanadium.
Other features and advantages of the present invention will partly be described in detail in embodiment subsequently.
Embodiment
Below the specific embodiment of the present invention is elaborated.Should be understood that embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.
The invention provides a kind of method of smelting ferrovanadium, the method comprises the steps:
(1) will comprise that the raw material of unslaked lime, iron and barium oxide contacts under the first thermite reaction condition with aluminium, obtains the first aluminium alloy and the first slag; With respect to every mole oxygen element in the described barium oxide, the consumption of aluminium is the 0.75-0.9 mole; Described the first thermite reaction condition so that in the first slag the content of total vanadium be not higher than 0.5 % by weight;
(2) described the first aluminium alloy is contacted under the second thermite reaction condition with the residue adjustment material that contains ferriferous oxide with unslaked lime and do not contain barium oxide, obtain the second aluminium alloy and the second slag; Described the second thermite reaction condition so that in described the second aluminium alloy the content of aluminium element be not higher than 1.5 % by weight, and the content of total vanadium is not higher than 0.8 % by weight in described the second slag.
Wherein, method of the present invention can be by the device of conventional smelting ferrovanadium, and for example the tilt bed electric arc furnace carries out.
Among the present invention, in the step (1), the described unslaked lime that comprises, iron, the raw material of barium oxide and contain ferriferous oxide and unslaked lime and the residue adjustment material that do not contain barium oxide obtain described raw material or condiment slag after not referring to must composition wherein mix, just for convenience of description, unslaked lime, iron, the compositions such as barium oxide are called raw material together, the compositions such as ferriferous oxide and unslaked lime are become the condiment slag together, wherein, the described unslaked lime that comprises, iron, the raw material of barium oxide and aluminium can be pre-mixed, wherein, can respectively do for oneself powder or particle of the form of each material.Each material can disposable whole addings before heating, also can divide many batches, and property or minutes many batches add remaining materials and continue heating again after first heating material begins.
Wherein, be as known in the art, in the step (1), unslaked lime is used for slag making, and iron is alloying constituent, is used for providing the ferro element of vanadium iron, and barium oxide is as vanadium source and oxygenant, and aluminium is reductive agent.Wherein, described iron can be low-carbon (LC) steel disc and/or abrasive grit.Described barium oxide can be in trivalent vanadium oxide compound, tetravalence barium oxide and the pentavalent barium oxide at least a, for example can be Vanadium Pentoxide in FLAKES and/or vanadous oxide.
Wherein, in the step (1), the content of unslaked lime, iron and barium oxide is especially requirement not, can be selection well known in the art, and for example, the weight ratio of unslaked lime and aluminium can be 1: 1.7-2.Calcium oxide content is preferably and is not less than 80 % by weight in the described unslaked lime.
Weight ratio between iron and the barium oxide can be according to the grade requirement adjustment of prepared vanadium iron, and for example with respect to the iron of 1 weight part, in v element, the consumption of described barium oxide is the 0.6-4 weight part; Particularly for the vanadium iron of 80 grades, can make the weight ratio between iron and the barium oxide (take the v element weighing scale) be about 1: 4.
Wherein, in the step (1), the consumption of aluminium is excessive with respect to the theoretical amount (aluminium element: the theoretical molar ratio of oxygen element is 2: 3) that forms aluminum oxide, particularly, with respect to every mole oxygen element in the described barium oxide, the consumption of aluminium is the 0.75-0.9 mole.
According to method provided by the invention, wherein, in the step (1), in order to reduce the total content of vanadium in the first slag (being the slag of reduction phase), and be conducive to reduce the content of aluminium in the vanadium iron product, under the preferable case, in the step (1), with respect to every mole oxygen element in the described barium oxide, the consumption of aluminium is the 0.79-0.86 mole.
According to method provided by the invention, wherein, in the step (1), described the first thermite reaction condition has no particular limits, can be the condition of routine, if can so that in the first slag the content of total vanadium be not higher than 0.5 % by weight, for example, described the first thermite reaction condition comprises: temperature can be 1800-2000 ℃, is preferably 1850-1950 ℃.The method that reaches said temperature can be undertaken by the mode of energising striking in the tilt bed electric arc furnace, and the heat release of thermite reaction can help the raising of temperature and keep.
According to method provided by the invention, wherein, be converted into fully vanadium in order to make barium oxide, and reduce current consumption, under the preferable case, in the step (1), described the first thermite reaction condition also comprises: the time is 15-40 minute.
According to method provided by the invention, wherein, in the process that step (1) is carried out, can detect the total content of vanadium in the slag at different time points, when the content of total vanadium in the slag is not higher than 0.5 % by weight, think the purpose that reaches reduction phase to get final product ending step (1), the slag that obtain this moment is the first slag, and the aluminium alloy that obtains is the first aluminium alloy.Step (1) can be separated described the first slag after finishing with described the first aluminium alloy, because the first slag floats on the liquid level of the first aluminium alloy, the method for separation can be undertaken by the mode of toppling over.
According to method provided by the invention, wherein, what mainly carry out in the step (2) is refining stage, to remove excessive aluminium by the residue adjustment material, for fear of introducing the vanadium that forms rich slag, described residue adjustment material does not contain barium oxide, but can the excessive aluminium of oxidation, among the present invention, described residue adjustment material is the residue adjustment material that contains ferriferous oxide and unslaked lime and do not contain barium oxide, ferriferous oxide and unslaked lime are used for the reactive aluminum with the first aluminium alloy, so that excessive aluminium enters in the second slag, enter in the second aluminium alloy after ferriferous oxide is reduced.Described residue adjustment material can carrying out the front once all addings of step (2), also can add in carrying out the front process with carrying out step (2) of step (2) in batches.
According to method provided by the invention, wherein, in the step (2), with respect to every mole of aluminium element to be removed in described the first aluminium alloy, in the amount of oxygen element, the consumption of described ferriferous oxide can be the 1.495-1.505 mole.Wherein, the amount of aluminium element to be removed refers to the difference of the aim parameter of aluminium element in the amount of aluminium element in described the first aluminium alloy and described the second aluminium alloy.
According to method provided by the invention, wherein, in the step (2), described the second thermite reaction condition comprises: temperature can be 1900-2200 ℃, is preferably 1950-2150 ℃.The method that reaches said temperature can be undertaken by the mode of energising striking in the tilt bed electric arc furnace, and the heat release of thermite reaction can help the raising of temperature and keep.
According to method provided by the invention, wherein, in order to remove fully excessive aluminium, and reduce current consumption, under the preferable case, in the step (2), described the second thermite reaction condition also comprises: the time is 5-15 minute.
According to method provided by the invention, wherein, under the preferable case, in the step (2), with respect to the aluminium element to be removed of 1 weight part in described the first aluminium alloy, in the described residue adjustment material, the consumption of unslaked lime is the 0.5-0.6 weight part, more preferably the 0.53-0.57 weight part.
According to method provided by the invention, wherein, what described ferriferous oxide can be in ferric oxide, Z 250 and the iron protoxide is at least a, is preferably ferric oxide.Described ferriferous oxide can add with at least a form in steel-making converter flue dust, iron ore concentrate and the hot rolling iron scale.
Except containing ferriferous oxide and unslaked lime, described condiment slag also can contain other composition, for example fluorite.
According to method provided by the invention, wherein, in the process that step (2) is carried out, can detect the content of vanadium in the slag at different time points, when the content of vanadium in the slag is not higher than 0.8 % by weight, think the purpose that reaches refining stage, get final product ending step (2), the slag that obtain this moment is the second slag, and the aluminium alloy that obtains is the second aluminium alloy, this second aluminium alloy is liquid vanadium iron, and this liquid state vanadium iron namely gets the vanadium iron product after the ingot casting cooling.Step (2) can be separated described the second slag after finishing with described the second aluminium alloy, the method for separation can by described the second slag is poured in the ingot mould with described the second aluminium alloy, then be removed the mode of slag layer and carry out.
More than describe preferred implementation of the present invention in detail; but the present invention is not limited to the detail in the above-mentioned embodiment, in technical conceive scope of the present invention; can carry out multiple simple change to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove in addition, each concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can make up by any suitable mode, for example, in the step (1), described the first thermite reaction condition comprises: temperature is 1800-2000 ℃, and the time is 15-40 minute.For fear of unnecessary repetition, the present invention is to the no longer separately explanation of various possible array modes.
In addition, also can carry out arbitrary combination between the various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Further describe by the following examples the present invention.Wherein, the rate of recovery of vanadium refers to the vanadium percentage composition in the total vanadium that feeds intake in the vanadium iron product.
Embodiment 1
Present embodiment is used for illustrating method provided by the invention.
(CaO content is 85 % by weight with Vanadium Pentoxide in FLAKES, unslaked lime, lower with), iron and aluminium obtains furnace charge after mixing, wherein, with respect to every mole oxygen element in the Vanadium Pentoxide in FLAKES, the consumption of aluminium is 0.804 mole, and the weight ratio of unslaked lime and aluminium is 1: 1.85; With respect to the iron of 1 weight part, in v element, the consumption of Vanadium Pentoxide in FLAKES is 4 weight parts; That is, the weight ratio of Vanadium Pentoxide in FLAKES, aluminium, unslaked lime and iron is 36.4: 21.708: 11.73: 5.1.
After packing into 2.93 tons above-mentioned furnace charge in the tilt bed electric arc furnace of 20 tons of nominal capacities, energising is heated to 1850 ℃ with above-mentioned furnace charge in 15min, and in 1850-1950 ℃ temperature range, keep 30min, then according to the ferrous ammonium sulfate titration of stipulating among the GB/T 8704.5-2007, record that total content of vanadium is 0.15 % by weight in the slag of this moment, this slag is the first slag, pours out described the first slag from the slag notch of tilt bed electric arc furnace, and remaining aluminium alloy is the first aluminium alloy.In described the first aluminium alloy, the amount that deducts aluminium in the first slag by charging capacity is calculated (together lower), and the content of aluminium is 20 kg/ton aluminium alloys.
(at this moment, total the first about 1 ton aluminium alloy in the stove of tumbling) adds residue adjustment material (steel-making converter flue dust (containing 20.8 kilograms ferric oxide) and 3.85 kilograms unslaked lime are mixed to get) in described the first aluminium alloy.Then in 1950-2150 ℃ temperature range, keep 10min, then according to the Chrome azurol s colorimetry among the GB/T8704.8-2009, the content that records aluminium in the aluminium alloy at this moment is 1.3 % by weight, this aluminium alloy is the second aluminium alloy, slag on this aluminium alloy liquid level is the second slag, in described the second slag, total content of vanadium is 0.7 % by weight.Described the second aluminium alloy and the second slag are poured in the ingot mould, removed the second slag, namely obtain the vanadium iron of 80 grades after the cooling, wherein the rate of recovery of vanadium is 97%.
Embodiment 2
Present embodiment is used for illustrating method provided by the invention.
Obtain furnace charge after Vanadium Pentoxide in FLAKES, unslaked lime, iron and aluminium mixed, wherein, with respect to every mole oxygen element in the Vanadium Pentoxide in FLAKES, the consumption of aluminium is 0.824 mole, and the weight ratio of unslaked lime and aluminium is 1: 2; With respect to the iron of 1 weight part, in v element, the consumption of Vanadium Pentoxide in FLAKES is 4 weight parts; That is, the weight ratio of Vanadium Pentoxide in FLAKES, aluminium, unslaked lime and iron is 36.4: 22.248: 11.124: 5.1.
After packing into 2.94 tons above-mentioned furnace charge in the tilt bed electric arc furnace of 20 tons of nominal capacities, energising is heated to 1820 ℃ with above-mentioned furnace charge in 15min, and in 1820-1900 ℃ temperature range, keep 32min, then according to the method for stipulating in the ferrous ammonium sulfate titration of stipulating among the GB/T 8704.5-2007, record that total content of vanadium is 0.13 % by weight in the slag of this moment, this slag is the first slag, pour out described the first slag from the slag notch of tilt bed electric arc furnace, remaining aluminium alloy is the first aluminium alloy.In described the first aluminium alloy, the content of aluminium is 22 kg/ton aluminium alloys.
(at this moment, total the first about 1 ton aluminium alloy in the stove of tumbling) adds residue adjustment material (smart iron ore (containing 29.6 kilograms ferric oxide) and 5.5 kilograms unslaked lime are mixed to get) in described the first aluminium alloy.Then in 1950-2150 ℃ temperature range, keep 12min, then according to the Chrome azurol s colorimetry among the GB/T8704.8-2009, the content that records aluminium in the aluminium alloy at this moment is 1.2 % by weight, this aluminium alloy is the second aluminium alloy, slag on this aluminium alloy liquid level is the second slag, in described the second slag, total content of vanadium is 0.65 % by weight.Described the second aluminium alloy and the second slag are poured in the ingot mould, removed the second slag, namely obtain the vanadium iron of 80 grades after the cooling, wherein the rate of recovery of vanadium is 97.3%.
Embodiment 3
Present embodiment is used for illustrating method provided by the invention.
Obtain furnace charge after Vanadium Pentoxide in FLAKES, unslaked lime, iron and aluminium mixed, wherein, with respect to every mole oxygen element in the Vanadium Pentoxide in FLAKES, the consumption of aluminium is 0.838 mole, and the weight ratio of unslaked lime and aluminium is 1: 1.7; With respect to the iron of 1 weight part, in v element, the consumption of Vanadium Pentoxide in FLAKES is 4 weight parts; That is, the weight ratio of Vanadium Pentoxide in FLAKES, aluminium, unslaked lime and iron is 36.4: 22.626: 13.31: 5.1.
After packing into 3.04 tons above-mentioned furnace charge in the tilt bed electric arc furnace of 20 tons of nominal capacities, energising is heated to 1900 ℃ with above-mentioned furnace charge in 20min, and in 1900-2000 ℃ temperature range, keep 25min, then according to the ferrous ammonium sulfate titration of stipulating among the GB/T 8704.5-2007, record that total content of vanadium is 0.11 % by weight in the slag of this moment, this slag is the first slag, pours out described the first slag from the slag notch of tilt bed electric arc furnace, and remaining aluminium alloy is the first aluminium alloy.In described the first aluminium alloy, the content of aluminium is 23 kg/ton aluminium alloys.
(at this moment, total the first about 1 ton aluminium alloy in the stove of tumbling) adds residue adjustment material (hot rolling iron scale (ferric oxide that contains 56.3kg) and the unslaked lime of 11.4kg are mixed to get) in described the first aluminium alloy.Then in 1900-2100 ℃ temperature range, keep 14min, then according to the Chrome azurol s colorimetry among the GB/T8704.8-2009, the content that records aluminium in the aluminium alloy at this moment is 0.4 % by weight, this aluminium alloy is the second aluminium alloy, slag on this aluminium alloy liquid level is the second slag, in described the second slag, total content of vanadium is 0.6 % by weight.Described the second aluminium alloy and the second slag are poured in the ingot mould, removed the second slag, namely obtain the vanadium iron of 80 grades after the cooling, wherein the rate of recovery of vanadium is 97.6%.
Embodiment 4
Present embodiment is used for illustrating method provided by the invention.
Obtain furnace charge after Vanadium Pentoxide in FLAKES, unslaked lime, iron and aluminium mixed, wherein, with respect to every mole oxygen element in the Vanadium Pentoxide in FLAKES, the consumption of aluminium is 0.858 mole, and the weight ratio of unslaked lime and aluminium is 1: 1.85; With respect to the iron of 1 weight part, in v element, the consumption of Vanadium Pentoxide in FLAKES is 4 weight parts.
After packing into 2.93 tons above-mentioned furnace charge in the tilt bed electric arc furnace of 20 tons of nominal capacities, energising is heated to 1850 ℃ with above-mentioned furnace charge in 15min, and in 1850-1950 ℃ temperature range, keep 40min, then according to the method for stipulating in the ferrous ammonium sulfate titration of stipulating among the GB/T 8704.5-2007, record that total content of vanadium is 0.45 % by weight in the slag of this moment, this slag is the first slag, pour out described the first slag from the slag notch of tilt bed electric arc furnace, remaining aluminium alloy is the first aluminium alloy.In described the first aluminium alloy, the content of aluminium is 20 kg/ton aluminium alloys.
(at this moment, total the first about 1 ton aluminium alloy in the stove of tumbling) adds residue adjustment material (steel-making converter flue dust (containing 20.8 kilograms ferric oxide) and 3.85 kilograms unslaked lime are mixed to get) in described the first aluminium alloy.Then in 1950-2150 ℃ temperature range, keep 10min, then according to the Chrome azurol s colorimetry among the GB/T8704.8-2009, the content that records aluminium in the aluminium alloy at this moment is 1.3 % by weight, this aluminium alloy is the second aluminium alloy, slag on this aluminium alloy liquid level is the second slag, in described the second slag, total content of vanadium is 0.55 % by weight.Described the second aluminium alloy and the second slag are poured in the ingot mould, removed the second slag, namely obtain the vanadium iron of 80 grades after the cooling, wherein the rate of recovery of vanadium is 96.0%.
Embodiment 5
Present embodiment is used for illustrating method provided by the invention.
Obtain furnace charge after Vanadium Pentoxide in FLAKES, unslaked lime, iron and aluminium mixed, wherein, with respect to every mole oxygen element in the Vanadium Pentoxide in FLAKES, the consumption of aluminium is 0.89 mole, and the weight ratio of unslaked lime and aluminium is 1: 1.85; With respect to the iron of 1 weight part, in v element, the consumption of Vanadium Pentoxide in FLAKES is 4 weight parts.
After packing into 2.91 tons above-mentioned furnace charge in the tilt bed electric arc furnace of 20 tons of nominal capacities, energising is heated to 1850 ℃ with above-mentioned furnace charge in 18min, and in 1850-1950 ℃ temperature range, keep 20min, then according to the ferrous ammonium sulfate titration of stipulating among the GB/T 8704.5-2007, record that total content of vanadium is 0.15 % by weight in the slag of this moment, this slag is the first slag, pours out described the first slag from the slag notch of tilt bed electric arc furnace, and remaining aluminium alloy is the first aluminium alloy.In described the first aluminium alloy, the content of aluminium is 30 kg/ton aluminium alloys.
In described the first aluminium alloy, add residue adjustment material (steel-making converter flue dust (containing 47.4 kilograms ferric oxide) and 8.65 kilogram of raw lime are mixed to get), so that with respect to every mole aluminium element in described the first aluminium alloy, in the amount of oxygen element, the consumption of described ferriferous oxide is 1.8 moles.Then in 1950-2150 ℃ temperature range, keep 15min, then according to the Chrome azurol s colorimetry among the GB/T 8704.8-2009, the content that records aluminium in the aluminium alloy at this moment is 1.4 % by weight, this aluminium alloy is the second aluminium alloy, slag on this aluminium alloy liquid level is the second slag, in described the second slag, total content of vanadium is 0.4 % by weight.Described the second aluminium alloy and the second slag are poured in the ingot mould, removed the second slag, namely obtain the vanadium iron of 80 grades after the cooling, wherein the rate of recovery of vanadium is 97.2%.
Comparative Examples 1
Present embodiment is used for illustrating existing method.
Obtain furnace charge after Vanadium Pentoxide in FLAKES, unslaked lime, iron and aluminium mixed, wherein, with respect to every mole oxygen element in the Vanadium Pentoxide in FLAKES, the consumption of aluminium is 0.7 mole, and the weight ratio of unslaked lime and aluminium is 1: 1.85; With respect to the iron of 1 weight part, in v element, the consumption of Vanadium Pentoxide in FLAKES is 4 weight parts.
After packing into 2.85 tons above-mentioned furnace charge in the tilt bed electric arc furnace of 20 tons of nominal capacities, energising is heated to 1850 ℃ with above-mentioned furnace charge in 15min, and in 1850-1950 ℃ temperature range, keep 30min, then according to the method for stipulating in the ferrous ammonium sulfate titration of stipulating among the GB/T 8704.5-2007, record that total content of vanadium is 0.2 % by weight in the slag of this moment, this slag is the first slag, pour out described the first slag from the slag notch of tilt bed electric arc furnace, remaining aluminium alloy is the first aluminium alloy.In described the first aluminium alloy, the content of aluminium is 30 kg/ton aluminium alloys.
In described the first aluminium alloy, add residue adjustment material (unslaked lime of 100.9 kilograms Vanadium Pentoxide in FLAKES and 11.8 kilograms is mixed to get).Then in 1950-2150 ℃ temperature range, keep 10min, then according to the Chrome azurol s colorimetry among the GB/T 8704.8-2009, the content that records aluminium in the aluminium alloy at this moment is 1.0 % by weight, this aluminium alloy is the second aluminium alloy, slag on this aluminium alloy liquid level is the second slag, in described the second slag, total content of vanadium is 5 % by weight.Described the second aluminium alloy and the second slag are poured in the ingot mould, removed the second slag, namely obtain the vanadium iron of 80 grades after the cooling, wherein the rate of recovery of vanadium is 93.6%.
By the comparison between embodiment 1-5 and the Comparative Examples 1, can find out, use the residue adjustment material contain ferriferous oxide and unslaked lime and not contain barium oxide to carry out residue adjustment at refining stage, thereby do not produce the rich slag that contains the above total vanadium of 3 % by weight, thereby improved the rate of recovery of vanadium.
And, every mole oxygen element in preferably with respect to described barium oxide, the consumption of aluminium is in the situation of 0.79-0.86 mole, can further reduce the content of vanadium in the reduction phase slag, and save the time of refining stage, thereby reduced energy consumption, alleviated the erosion loss of stove and accessory.
And method provided by the invention also has technique and the simple advantage of execute-in-place.
Claims (10)
1. the method for a smelting ferrovanadium, the method comprises the steps:
(1) will comprise that the raw material of unslaked lime, iron and barium oxide contacts under the first thermite reaction condition with aluminium, obtains the first aluminium alloy and the first slag; With respect to every mole oxygen element in the described barium oxide, the consumption of aluminium is the 0.75-0.9 mole; Described the first thermite reaction condition so that in the first slag the content of total vanadium be not higher than 0.5 % by weight;
(2) described the first aluminium alloy is contacted under the second thermite reaction condition with the residue adjustment material that contains ferriferous oxide with unslaked lime and do not contain barium oxide, obtain the second aluminium alloy and the second slag; Described the second thermite reaction condition so that in described the second aluminium alloy the content of aluminium element be not higher than 1.5 % by weight, and the content of total vanadium is not higher than 0.8 % by weight in described the second slag.
2. method according to claim 1, wherein, in the step (1), with respect to every mole oxygen element in the described barium oxide, the consumption of aluminium is the 0.79-0.86 mole.
3. method according to claim 1 and 2, wherein, described barium oxide is Vanadium Pentoxide in FLAKES and/or vanadous oxide.
4. method according to claim 1 and 2, wherein, in the step (1), in the described raw material, the weight ratio of unslaked lime and aluminium is 1: 1.7-2.
5. the described method of any one according to claim 1-4, wherein, in the step (1), with respect to the iron of 1 weight part, in v element, the consumption of described barium oxide is the 0.6-4 weight part.
6. the described method of any one according to claim 1-5, wherein, in the step (1), described the first thermite reaction condition comprises: temperature is 1800-2000 ℃, the time is 15-40 minute.
7. method according to claim 1, wherein, in the step (2), with respect to every mole of aluminium element to be removed in described the first aluminium alloy, in the amount of oxygen element, the consumption of described ferriferous oxide is the 1.495-1.505 mole.
8. according to claim 1 or 7 described methods, wherein, described ferriferous oxide is ferric oxide.
9. according to claim 1 or 7 described methods, wherein, in the step (2), with respect to the aluminium element to be removed of 1 weight part in described the first aluminium alloy, in the described residue adjustment material, the consumption of unslaked lime is the 0.5-0.6 weight part.
10. the described method of any one according to claim 1-9, wherein, in the step (2), described the second thermite reaction condition comprises: temperature is 1900-2200 ℃, the time is 5-15 minute.
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Cited By (9)
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| CN104141025A (en) * | 2014-08-14 | 2014-11-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for casting and dealuminizing ferrovanadium by electro-aluminothermic process |
| CN105018828A (en) * | 2015-08-13 | 2015-11-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of vanadium iron |
| CN106011601A (en) * | 2016-07-07 | 2016-10-12 | 攀钢集团攀枝花钢铁研究院有限公司 | External refining method for smelting ferrovanadium |
| CN106435223A (en) * | 2016-10-12 | 2017-02-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing low-aluminum medium ferrovanadium in tilting furnace by electro-aluminothermic process |
| CN110747359A (en) * | 2019-10-25 | 2020-02-04 | 攀钢集团钒钛资源股份有限公司 | Method for smelting ferrovanadium |
| CN112981141A (en) * | 2021-02-08 | 2021-06-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing ferrovanadium alloy from titanium tetrachloride refining tailings |
| US11180827B2 (en) * | 2017-06-13 | 2021-11-23 | Northeastern University | Method for preparing ferrovanadium alloys based on aluminothermic self-propagating gradient reduction and slag washing refining |
| CN115369210A (en) * | 2022-09-02 | 2022-11-22 | 攀钢集团西昌钒制品科技有限公司 | Method for controlling vanadium content in vanadium iron slag smelted by large-scale tilting furnace |
| CN115522092A (en) * | 2022-10-25 | 2022-12-27 | 河南昱千鑫金属科技有限公司 | Production method of high-nitrogen low-carbon vanadium-nitrogen alloy |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141025A (en) * | 2014-08-14 | 2014-11-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for casting and dealuminizing ferrovanadium by electro-aluminothermic process |
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| CN106011601A (en) * | 2016-07-07 | 2016-10-12 | 攀钢集团攀枝花钢铁研究院有限公司 | External refining method for smelting ferrovanadium |
| CN106435223A (en) * | 2016-10-12 | 2017-02-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing low-aluminum medium ferrovanadium in tilting furnace by electro-aluminothermic process |
| US11180827B2 (en) * | 2017-06-13 | 2021-11-23 | Northeastern University | Method for preparing ferrovanadium alloys based on aluminothermic self-propagating gradient reduction and slag washing refining |
| CN110747359A (en) * | 2019-10-25 | 2020-02-04 | 攀钢集团钒钛资源股份有限公司 | Method for smelting ferrovanadium |
| CN110747359B (en) * | 2019-10-25 | 2021-08-24 | 攀钢集团钒钛资源股份有限公司 | Method for smelting ferrovanadium |
| CN112981141A (en) * | 2021-02-08 | 2021-06-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing ferrovanadium alloy from titanium tetrachloride refining tailings |
| CN112981141B (en) * | 2021-02-08 | 2022-08-05 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing ferrovanadium alloy from titanium tetrachloride refining tailings |
| CN115369210A (en) * | 2022-09-02 | 2022-11-22 | 攀钢集团西昌钒制品科技有限公司 | Method for controlling vanadium content in vanadium iron slag smelted by large-scale tilting furnace |
| CN115522092A (en) * | 2022-10-25 | 2022-12-27 | 河南昱千鑫金属科技有限公司 | Production method of high-nitrogen low-carbon vanadium-nitrogen alloy |
| CN115522092B (en) * | 2022-10-25 | 2023-10-13 | 河南昱千鑫金属科技有限公司 | Production method of high-nitrogen low-carbon vanadium-nitrogen alloy |
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