CN104726715A - Recycling method for vanadium-chromium waste residues - Google Patents
Recycling method for vanadium-chromium waste residues Download PDFInfo
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- CN104726715A CN104726715A CN201510145251.3A CN201510145251A CN104726715A CN 104726715 A CN104726715 A CN 104726715A CN 201510145251 A CN201510145251 A CN 201510145251A CN 104726715 A CN104726715 A CN 104726715A
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- vanadium
- waste residue
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- chromium waste
- chromium
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- WFISYBKOIKMYLZ-UHFFFAOYSA-N [V].[Cr] Chemical compound [V].[Cr] WFISYBKOIKMYLZ-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 239000002699 waste material Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000004064 recycling Methods 0.000 title abstract description 5
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 66
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 41
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 35
- 230000002829 reductive effect Effects 0.000 claims abstract description 34
- 239000011651 chromium Substances 0.000 claims abstract description 31
- 239000008188 pellet Substances 0.000 claims abstract description 29
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 22
- 239000002893 slag Substances 0.000 claims abstract description 19
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000292 calcium oxide Substances 0.000 claims abstract description 18
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 18
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000003723 Smelting Methods 0.000 claims abstract description 16
- 238000005275 alloying Methods 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 33
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 32
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 25
- 229910052742 iron Inorganic materials 0.000 claims description 22
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 15
- 229910052698 phosphorus Inorganic materials 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 9
- 239000000571 coke Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 6
- 238000010891 electric arc Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000009628 steelmaking Methods 0.000 abstract description 5
- 239000000654 additive Substances 0.000 abstract description 3
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 abstract description 2
- 229910000640 Fe alloy Inorganic materials 0.000 abstract 2
- OTILYRUTOZUYMB-UHFFFAOYSA-N [Fe].[Cr].[V] Chemical compound [Fe].[Cr].[V] OTILYRUTOZUYMB-UHFFFAOYSA-N 0.000 abstract 2
- 229910045601 alloy Inorganic materials 0.000 abstract 2
- 239000000956 alloy Substances 0.000 abstract 2
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- 239000000470 constituent Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910000742 Microalloyed steel Inorganic materials 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 102000011759 adducin Human genes 0.000 description 1
- 108010076723 adducin Proteins 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a recycling method for vanadium-chromium waste residues. The recycling method comprises the following process steps: drying and dehydrating the vanadium-chromium waste residues at 300-450 DEG C, and pressing the vanadium-chromium waste residues into ball materials, namely green pellets, under pressure of 20-22Mpa; adding the green pellets, a reducing agent and calcium oxide into an alloy furnace in three stages in sequence, paving the green pellets on the bottom of an electric furnace before adding first-stage materials; and adding the first-stage raw materials after electrifying, reducing the reducing agent to reduce after melting completely, sequentially adding second-stage and third-stage materials after smelting out lean slag, and reducing to obtain a vanadium-chromium-iron alloy. According to the recycling method disclosed by the invention, the vanadium-chromium-iron alloy is produced by adopting the vanadium-chromium waste residues, the alloy can replace high-valence steelmaking additives of chromium iron, vanadium iron and the like, and is added into molten steel to perform micro-alloying, so that the vanadium and the chromium resources are recycled, the process cost is reduced, and the energy-saving and environment-friendly effects are very remarkable.
Description
Technical field
The invention belongs to metallurgical technology field, be specifically related to a kind of vanadium chromium waste residue resource Application way.
Background technology
Vanadium chromium waste residue is the ammonia nitrogen waste water that Leaching of Vanadium from Vanadium slag production technique produces, through the sludge-like solid waste that the processes such as reduction, neutralization are settled out.Its main component is: Cr
2o
3, V
2o
5, Fe
2o
3, moisture and other impurity elements, comprise sodium, silicon, sulphur, phosphorus, calcium etc.
In vanadium chromium waste residue, chromium, v element are the huge environmental pollutant of harm, are again valuable mineral products, strategic resources.Once store up or discharge, certainly lead to extremely serious environmental hazard and the wasting of resources.This type of vanadium chromium waste residue is all in the reasons such as lower valency because of its complicated component, valuable element, is acknowledged as the solid waste being difficult to process, when pre-treatment main path has following two kinds always:
First kind of way carries out step by step arithmetic to the valuable element in vanadium chromium waste residue.Number of patent application 201310677718.X discloses a kind of method that sodium-salt calcination extracts vanadium, chromium in such waste residue, with can make vanadium in waste residue by roasting, the leaching yield of chromium reaches more than 90%, but there is leach liquor vanadium in the method, chromium element is difficult to be separated, in production process, chemical agent add-on is excessive, production cost is high, output wastewater treatment difficulty, easily causes secondary pollution problems.
The second way be by vanadium chromium waste residue after preliminary treatment, directly return steelmaking system as additive.Patent publication No. CN 103131852A will disclose after one will be dried containing vanadium chromium mud and adds organic binder bond and silicon carbide powder, obtained containing vanadium chromium sludge ball, return LF furnace refining procedure, utilize LF stove to contain the method for carrying out molten steel microalloying in vanadium chromium mud ball after vanadium chromium element reduction.The method has that processing cost is low, vanadium chromium element effective rate of utilization comparatively advantages of higher, but due in vanadium chromium waste residue except vanadium, chromium beneficial element, also make steel harmful element in a large number containing silicon, sulphur, phosphorus etc., these harmful elements are inevitably introduced steelmaking system by aforesaid method, have a strong impact on micro-alloyed steel quality.
Summary of the invention
The present invention is directed in the various technique of pre-treatment vanadium chromium waste residue, to have that processing cost is high, valuable element utilization ratio is low, there is secondary pollution risk, the problem such as harmful element harm micro-alloyed steel quality, there is provided a kind of resource utilization method of vanadium chromium waste residue, the method can realize the comprehensive application of valuable metal element.
For solving the problems of the technologies described above, a kind of vanadium chromium of the present invention waste residue resource Application way adopts following processing step:
(1) dry pressure ball: described vanadium chromium waste residue drying and dehydrating at 300-450 DEG C, controls after its water content is less than 5%, to make ball material, i.e. raw group ball at 20-22Mpa pressure;
(2) three phases reduction: divided for three phases be added to successively in alloying furnace in green pellets, reductive agent, calcium oxide, add green pellets each issue: reductive agent: calcium oxide mass ratio is 100 ~ 150:60 ~ 80:120 ~ 170,1500 ~ 1800 DEG C are kept, reaction 2.5 ~ 4h under electric-arc heating; First green pellets is added furnace bottom paving before adding first phase material; Add first phase mixing raw material after energising, add reductive agent reduction after fusing completely, after smelting lean slag, order adds two, three phase materials, and reduction can obtain vanadium ferrochrome.
Step of the present invention (1) ball material density 2.0 ~ 3.5g/ ㎝
3.
Reductive agent described in step of the present invention (2) is respectively siliceous reducer and carbonaceous reducing agent, and wherein siliceous reducer is the mixture of ferro-silicon and Alsimin, and the mass ratio that its ferro-silicon and Alsimin add is: 20:1 ~ 50:1; Carbonaceous reducing agent is nut coke, and the mass ratio that siliceous reducer and carbonaceous reducing agent add is: 3:1 ~ 5:1.
Before adding first phase material in step of the present invention (2), paving adds the amount of green pellets is 500 ~ 1000 ㎏.
Before in step of the present invention (2), first phase feeds intake, need add the striking of irony material, add-on is 50 ~ 100 ㎏; Described irony material striking is any one or a few in bushel iron bits, steel scrap, iron powder.
The order that in step of the present invention (2), siliceous carbonaceous reducing agent adds is: ferro-silicon, carbonaceous reducing agent, Alsimin.
In step of the present invention (2), lean slag contains chromium, content of vanadium all lower than 0.5%.
In step of the present invention (2), vanadium ferrochrome main chemical compositions is: V:20 ~ 40%, Cr:20 ~ 40%, Fe:20 ~ 40%, Si≤2.5%, S≤0.20%, P≤0.10%, surplus is inevitable impurity.
In step of the present invention (1), vanadium chromium waste residue main chemical compositions is: Cr
2o
38 ~ 21%, V
2o
5: 7 ~ 28%, SiO
2: 3 ~ 4%, Fe
2o
310 ~ 29%, moisture content is 30% ~ 60%.
Reaction principle of the present invention is as follows: at high temperature, and the Low Valent Vanadium in vanadium chromium waste residue, chromium cpd are reduced agent ferrosilicon and ferrosilicoaluminum reduction, and form vanadium ferrochrome, reaction formula is as follows:
3CaO + 2V
2O
3 + 3FeSi → 3FeV + 3CaO·SiO
2
3CaO + 2Cr
2O
3 + 3FeSi → 3FeCr+ 3CaO·SiO
2
More than reaction is thermopositive reaction, but reaction heat is not enough to maintain furnace charge spontaneous reaction, and the additional heat that need be energized is carried out to maintain reaction.
The beneficial effect adopting technique scheme to produce is:
1. vanadium ferrochrome ball after reaction is substituted the high price such as ferrochrome, vanadium iron steel-making additive, be added in molten steel and carry out microalloying, achieve the recycling of vanadium chromium waste residue, there is technological process simple, low production cost, vanadium, chromium element utilization ratio advantages of higher.
2. the harmful element such as silicon, sulphur, phosphorus in vanadium chromium waste residue enters slag phase with calcium oxide or evaporates into gas phase in smelting process, overcoming original technique will obtain containing vanadium chromium sludge ball, directly return LF furnace refining procedure, make harmful element introduce steelmaking system, have a strong impact on the defect of micro-alloyed steel quality.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Embodiment 1
Vanadium chromium waste residue principal constituent used is Cr
2o
3: 18.1%, V
2o
5: 22.7%, SiO
2: 4.0%, Fe
2o
3: 29.0%, moisture: 31.2%.
(1) dry pressure ball: described vanadium chromium waste residue drying and dehydrating at 300 DEG C, controlling its water content is 1.5%, makes ball material, density 2.1g/ ㎝ at 20Mpa pressure
3, i.e. raw group ball.
(2) three phases reduction: divided for three phases be added to successively in alloying furnace in green pellets, reductive agent, calcium oxide, add green pellets each issue: reductive agent: calcium oxide mass ratio is 100:60:120, at keeping 1800 DEG C, reaction 3h; First add 500 ㎏ green pellets furnace bottom paving before adding first phase material, add 50kg bushel iron bits as the striking of irony material.
Add first phase mixing raw material after energising, add reductive agent reduction after fusing completely, after smelting lean slag, order adds two, three phase materials, and reduction can obtain vanadium ferrochrome.
Reductive agent is respectively siliceous reducer and carbonaceous reducing agent, and wherein siliceous reducer is the mixture of ferro-silicon and Alsimin, and the mass ratio that its ferro-silicon and Alsimin add is 20:1; Carbonaceous reducing agent is nut coke, and the mass ratio that siliceous reducer and carbonaceous reducing agent add is 3:1.The order that siliceous carbonaceous reducing agent adds is: ferro-silicon, carbonaceous reducing agent, Alsimin.
Smelting process output lean slag is respectively 0.35%, 0.45% containing chromium, content of vanadium.
Vanadium ferrochrome, principal constituent is: V:37.8%, Cr:21.5%, Fe:39.8%, Si:2.0%, S:0.10%, P:0.09%, and surplus is inevitable impurity.
Embodiment 2
Vanadium chromium waste residue principal constituent used is Cr
2o
3: 21.0%, V
2o
5: 23.4%, SiO
2: 3.2%, Fe
2o
3: 28.1%, moisture: 30.0%.
(1) dry pressure ball: described vanadium chromium waste residue drying and dehydrating at 400 DEG C, controlling its water content is 1%, makes ball material, density 3.0g/ ㎝ at 22Mpa pressure
3, i.e. raw group ball.
(2) three phases reduction: divided for three phases be added to successively in alloying furnace in green pellets, reductive agent, calcium oxide, add green pellets each issue: reductive agent: calcium oxide mass ratio is 100:70:110, at keeping 1800 DEG C, reaction 3.5h; First add 1000 ㎏ green pellets furnace bottom paving before adding first phase material, add 100 ㎏ steel scraps as the striking of irony material.
Add first phase mixing raw material after energising, add reductive agent reduction after fusing completely, after smelting lean slag, order adds two, three phase materials, and reduction can obtain vanadium ferrochrome.
Reductive agent is respectively siliceous reducer and carbonaceous reducing agent, and wherein siliceous reducer is the mixture of ferro-silicon and Alsimin, and the mass ratio that its ferro-silicon and Alsimin add is 50:1; Carbonaceous reducing agent is nut coke, and the mass ratio that siliceous reducer and carbonaceous reducing agent add is 5:1.The order that siliceous carbonaceous reducing agent adds is: ferro-silicon, carbonaceous reducing agent, Alsimin.
Smelting process output lean slag is respectively 0.30%, 0.33% containing chromium, content of vanadium.
Vanadium ferrochrome, principal constituent is: V:35.3%, Cr:32.2%, Fe:28.5%, Si:1.8%, S:0.10%, P:0.08%, the inevitable impurity of surplus.
Embodiment 3
Vanadium chromium waste residue principal constituent used is Cr
2o
3: 18.7%, V
2o
5: 11.4%, SiO
2: 1.7%, Fe
2o
3: 18.2%, moisture: 51.1%.
(1) dry pressure ball: described vanadium chromium waste residue drying and dehydrating at 450 DEG C, controlling its water content is 5%, makes ball material, density 2.0g/ ㎝ at 21Mpa pressure
3, i.e. raw group ball.
(2) three phases reduction: divided for three phases be added to successively in alloying furnace in green pellets, reductive agent, calcium oxide, add green pellets each issue: reductive agent: calcium oxide mass ratio is 150:80:170, at keeping 1500 DEG C, reaction 4h; First add 800 ㎏ green pellets furnace bottom paving before adding first phase material, add 60 ㎏ iron powders as the striking of irony material.
Add first phase mixing raw material after energising, add reductive agent reduction after fusing completely, after smelting lean slag, order adds two, three phase materials, and reduction can obtain vanadium ferrochrome.
Reductive agent is respectively siliceous reducer and carbonaceous reducing agent, and wherein siliceous reducer is the mixture of ferro-silicon and Alsimin, and the mass ratio that its ferro-silicon and Alsimin add is 30:1; Carbonaceous reducing agent is nut coke, and the mass ratio that siliceous reducer and carbonaceous reducing agent add is 4:1.The order that siliceous carbonaceous reducing agent adds is: ferro-silicon, carbonaceous reducing agent, Alsimin.
Smelting process output lean slag is respectively 0.32%, 0.30% containing chromium, content of vanadium.
Vanadium ferrochrome, principal constituent is: V:20.0%, Cr:40.0%, Fe:40.0%, Si:2.5%, S:0.12%, P:0.07%, the inevitable impurity of surplus.
Embodiment 4
Vanadium chromium waste residue principal constituent used is Cr
2o
3: 20.03%, V
2o
5: 28.0%, SiO
2: 0.95%, Fe
2o
3: 12.1%, moisture: 40.6%.
(1) dry pressure ball: described vanadium chromium waste residue drying and dehydrating at 350 DEG C, controlling its water content is 4%, makes ball material, density 3.5g/ ㎝ at 22Mpa pressure
3, i.e. raw group ball.
(2) three phases reduction: divided for three phases be added to successively in alloying furnace in green pellets, reductive agent, calcium oxide, add green pellets each issue: reductive agent: calcium oxide mass ratio is 120:65:150, at keeping 1600 DEG C, reaction 3h; Add before first phase material and first add 600 ㎏ green pellets furnace bottom paving, add 80 ㎏ steel scraps and iron powder equal proportion mixture as the striking of irony material.
Add first phase mixing raw material after energising, add reductive agent reduction after fusing completely, after smelting lean slag, order adds two, three phase materials, and reduction can obtain vanadium ferrochrome.
Reductive agent is respectively siliceous reducer and carbonaceous reducing agent, and wherein siliceous reducer is the mixture of ferro-silicon and Alsimin, and the mass ratio that its ferro-silicon and Alsimin add is 35:1; Carbonaceous reducing agent is nut coke, and the mass ratio that siliceous reducer and carbonaceous reducing agent add is 5:1.The order that siliceous carbonaceous reducing agent adds is: ferro-silicon, carbonaceous reducing agent, Alsimin.
Smelting process output lean slag is respectively 0.35%, 0.37% containing chromium, content of vanadium.
Vanadium ferrochrome, principal constituent is: V:40.0%, Cr:35.5%, Fe:20.0%, Si:1.0%, S:0.2%, P:0.06%, the inevitable impurity of surplus.
Embodiment 5
Vanadium chromium waste residue principal constituent used is Cr
2o
3: 9.13%, V
2o
5: 18.38%, SiO
2: 1.11%, Fe
2o
3: 12.49%, moisture: 60.0%.
(1) dry pressure ball: described vanadium chromium waste residue drying and dehydrating at 380 DEG C, controlling its water content is 3%, makes ball material, density 3.2g/ ㎝ at 20Mpa pressure
3, i.e. raw group ball.
(2) three phases reduction: divided for three phases be added to successively in alloying furnace in green pellets, reductive agent, calcium oxide, add green pellets each issue: reductive agent: calcium oxide mass ratio is 110:75:160, at keeping 1700 DEG C, reaction 2.5h; First add 900 ㎏ green pellets furnace bottom paving before adding first phase material, add 95 ㎏ bushel iron bits as the striking of irony material.
Add first phase mixing raw material after energising, add reductive agent reduction after fusing completely, after smelting lean slag, order adds two, three phase materials, and reduction can obtain vanadium ferrochrome.
Reductive agent is respectively siliceous reducer and carbonaceous reducing agent, and wherein siliceous reducer is the mixture of ferro-silicon and Alsimin, and the mass ratio that its ferro-silicon and Alsimin add is 40:1; Carbonaceous reducing agent is nut coke, and the mass ratio that siliceous reducer and carbonaceous reducing agent add is 3:1.The order that siliceous carbonaceous reducing agent adds is: ferro-silicon, carbonaceous reducing agent, Alsimin.
Smelting process output lean slag is respectively 0.38%, 0.40% containing chromium, content of vanadium.
Vanadium ferrochrome, principal constituent is: V:33.9%, Cr:20.0%, Fe:28.8%, Si:1.5%, S:0.15%, P:0.1%, the inevitable impurity of surplus.
Embodiment 6
Vanadium chromium waste residue main chemical compositions used is Cr
2o
3: 8.0%, V
2o
5: 7.0%, SiO
2: 3.0%, Fe
2o
3: 10.0%, moisture: 55.0%.
(1) dry pressure ball: described vanadium chromium waste residue drying and dehydrating at 450 DEG C, controlling its water content is 5%, makes ball material, density 2.0g/ ㎝ at 21Mpa pressure
3, i.e. raw group ball.
(2) three phases reduction: divided for three phases be added to successively in alloying furnace in green pellets, reductive agent, calcium oxide, add green pellets each issue: reductive agent: calcium oxide mass ratio is 150:80:170, at keeping 1500 DEG C, reaction 4h; First add 800 ㎏ green pellets furnace bottom paving before adding first phase material, add 60 ㎏ iron powders as the striking of irony material.
Add first phase mixing raw material after energising, add reductive agent reduction after fusing completely, after smelting lean slag, order adds two, three phase materials, and reduction can obtain vanadium ferrochrome.
Reductive agent is respectively siliceous reducer and carbonaceous reducing agent, and wherein siliceous reducer is the mixture of ferro-silicon and Alsimin, and the mass ratio that its ferro-silicon and Alsimin add is 30:1; Carbonaceous reducing agent is nut coke, and the mass ratio that siliceous reducer and carbonaceous reducing agent add is 4:1.The order that siliceous carbonaceous reducing agent adds is: ferro-silicon, carbonaceous reducing agent, Alsimin.
Smelting process output lean slag is respectively 0.35%, 0.31% containing chromium, content of vanadium.
Vanadium ferrochrome main chemical compositions is: V:30.7%, Cr:28.9%, Fe:38.8%, Si:1.9%, S:0.13%, P:0.05%, the inevitable impurity of surplus.
Claims (9)
1. a vanadium chromium waste residue resource Application way, is characterized in that, adopts following processing step:
(1) dry pressure ball: described vanadium chromium waste residue drying and dehydrating at 300-450 DEG C, controls after its water content is less than 5%, to make ball material, i.e. raw group ball at 20-22Mpa pressure;
(2) three phases reduction: divided for three phases be added to successively in alloying furnace in green pellets, reductive agent, calcium oxide, add green pellets each issue: reductive agent: calcium oxide mass ratio is 100 ~ 150:60 ~ 80:120 ~ 170,1500 ~ 1800 DEG C are kept, reaction 2.5 ~ 4h under electric-arc heating; First green pellets is added furnace bottom paving before adding first phase material; Add first phase mixing raw material after energising, add reductive agent reduction after fusing completely, after smelting lean slag, order adds two, three phase materials, and reduction can obtain vanadium ferrochrome.
2. the method for a kind of vanadium chromium waste residue resource utilization according to claim 1, is characterized in that, described step (1) ball material density 2.0 ~ 3.5g/ ㎝
3.
3. the method for a kind of vanadium chromium waste residue resource utilization according to claim 1, it is characterized in that, reductive agent described in described step (2) is respectively siliceous reducer and carbonaceous reducing agent, wherein siliceous reducer is the mixture of ferro-silicon and Alsimin, and the mass ratio that its ferro-silicon and Alsimin add is: 20:1 ~ 50:1; Carbonaceous reducing agent is nut coke, and the mass ratio that siliceous reducer and carbonaceous reducing agent add is: 3:1 ~ 5:1.
4. the method for a kind of vanadium chromium waste residue resource utilization according to claim 1, it is characterized in that, before adding first phase material in described step (2), paving adds the amount of green pellets is 500 ~ 1000 ㎏.
5. the method for a kind of vanadium chromium waste residue resource utilization according to claim 1, it is characterized in that, before in described step (2), first phase feeds intake, need add the striking of irony material, add-on is 50 ~ 100 ㎏; Described irony material striking is any one or a few in bushel iron bits, steel scrap, iron powder.
6. the method for a kind of vanadium chromium waste residue resource utilization according to claim 1, it is characterized in that, the order that in described step (2), siliceous carbonaceous reducing agent adds is: ferro-silicon, carbonaceous reducing agent, Alsimin.
7. the method for a kind of vanadium chromium waste residue resource utilization according to claim 1, it is characterized in that, in described step (2), lean slag contains chromium, content of vanadium all lower than 0.5%.
8. the method for a kind of vanadium chromium waste residue resource utilization according to claim 1, it is characterized in that, in described step (2), vanadium ferrochrome main chemical compositions is: V:20 ~ 40%, Cr:20 ~ 40%, Fe:20 ~ 40%, Si≤2.5%, S≤0.20%, P≤0.10%, surplus is inevitable impurity.
9. the method for a kind of vanadium chromium waste residue resource utilization according to claim 1, it is characterized in that, in described step (1), vanadium chromium waste residue main chemical compositions is: Cr
2o
3: 8 ~ 21%, V
2o
5: 7 ~ 28%, SiO
2: 3 ~ 4%, Fe
2o
3: 10 ~ 29%, moisture: 30 ~ 60%.
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| CN106244808A (en) * | 2016-08-11 | 2016-12-21 | 攀钢集团西昌钢钒有限公司 | Powder vanadium-containing material reclaims the method for vanadium |
| CN107794326A (en) * | 2017-10-31 | 2018-03-13 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of recoverying and utilizing method for the Magnetic Materials containing vanadium |
| CN107868872A (en) * | 2017-11-30 | 2018-04-03 | 攀枝花学院 | The method that vanadium chromium reducing slag two step method reduction melting prepares vanadium ferrochrome |
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