CN111394569A - Roasting method for producing vanadium pentoxide - Google Patents
Roasting method for producing vanadium pentoxide Download PDFInfo
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- CN111394569A CN111394569A CN202010310892.0A CN202010310892A CN111394569A CN 111394569 A CN111394569 A CN 111394569A CN 202010310892 A CN202010310892 A CN 202010310892A CN 111394569 A CN111394569 A CN 111394569A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G31/00—Compounds of vanadium
- C01G31/02—Oxides
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/22—Obtaining vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/02—Working-up flue dust
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- 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
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- General Life Sciences & Earth Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a roasting method for producing vanadium pentoxide, which comprises the following steps: (1) mixing an additive and industrial salt to obtain a mixed material; (2) mixing the mixed material obtained in the step (1), sodium salt, fine slag and return slag, and then roasting to obtain clinker; wherein the clinker is used for extracting vanadium. According to the invention, through reasonable design of the process, the waste is recycled by utilizing the synergistic interaction between the raw materials, the increasingly severe environment-friendly situation requirements are met, and the consumption of auxiliary materials of the rotary kiln is reduced.
Description
Technical Field
The invention relates to the field of solid waste utilization, in particular to a roasting method for producing vanadium pentoxide.
Background
At present, the fly ash is a byproduct generated by dust collection after being discharged by a pushed slab kiln in the process of producing vanadium-nitrogen alloy. At present, most domestic vanadium-nitrogen alloy production enterprises use the fly ash generated by the pushed slab kiln as garbage treatment. As environmental standards increase, storage and transportation of fly ash can pose environmental risks. In order to meet the increasingly severe environment-friendly situation requirements and reduce the consumption of additives in the roasting process of the vanadium pentoxide rotary kiln, the technical research on the mixing of the pushed slab kiln fly ash for producing vanadium-nitrogen alloy in the rotary kiln is specially carried out.
CN109988918A discloses a method for preparing ammonium metavanadate from ferrovanadium fly ash. The technical problem to be solved is to provide a method for preparing ammonium metavanadate by taking ferrovanadium fly ash as a raw material, which comprises the following steps: a. roasting: roasting the ferrovanadium fly ash to obtain roasted clinker; b. leaching: adding water to the roasted clinker for leaching, and performing solid-liquid separation to obtain vanadium-containing leaching solution; c. and (3) precipitation: adding ammonium salt into the vanadium-containing leaching solution for precipitation to obtain ammonium metavanadate. The method disclosed by the invention has the advantages of low cost, high vanadium yield and the like.
CN102477492A discloses a method for treating vanadium-containing smoke dust, wherein the vanadium-containing smoke dust is generated in a vanadium iron smelting process by an aluminothermic process, and the method comprises the following steps: and carrying out cyclone dust removal and bag dust removal on the vanadium-containing smoke dust in sequence to respectively obtain cyclone dust removal ash and bag dust removal ash, carrying out first water washing and filtering on the obtained cyclone dust removal ash to obtain first water-washed cyclone dust removal ash, and using the first water-washed cyclone dust removal ash for ferrovanadium smelting. The disclosed method reduces the content of impurities such as potassium, sodium and the like in the ferrovanadium product, thereby improving the quality of ferrovanadium, solving the problem of dust pollution caused by ferrovanadium smelting, and realizing the recycling of vanadium-containing smoke dust.
CN110396611A discloses a method for preparing a sodium vanadate solution by recovering ferrovanadium fly ash, which comprises the following steps: (1) stirring and uniformly mixing ferrovanadium dust, vanadium slag and industrial liquid sodium hydroxide according to a certain solid-liquid ratio to obtain vanadium slag slurry; (2) conveying the vanadium slag slurry to a reaction kettle, providing conditions for the reaction kettle through oxygen and steam, and oxidizing and leaching the vanadium slag slurry; (3) releasing the vanadium slag slurry subjected to oxidation leaching to normal pressure in a flash tank, cooling, and allowing the vanadium slag slurry to enter a desilication mixing tank; (4) conveying the lime slurry to a desiliconization mixing tank, and desiliconizing the vanadium slag slurry subjected to oxidation leaching by using the lime slurry; (5) and purifying and filtering the vanadium slag slurry after desiliconization to obtain a sodium vanadate solution and filter slag. The sodium vanadate solution is prepared by recycling the ferrovanadium fly ash, so that loss of valuable elements is avoided, the adding proportion of the ferrovanadium fly ash reaches 9.00-32.00%, and the recovery rate of vanadium elements in the fly ash reaches 85-91%.
Disclosure of Invention
In view of the problems in the prior art, the invention aims to provide a roasting method for producing vanadium pentoxide, which not only meets the increasingly severe environment-friendly situation requirement, but also reduces the consumption of auxiliary materials of a rotary kiln by recycling the fly ash in the rotary kiln.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a roasting method for producing vanadium pentoxide, which comprises the following steps:
(1) mixing an additive and industrial salt to obtain a mixed material;
(2) mixing the mixed material obtained in the step (1), sodium salt, fine slag and return slag, and then roasting to obtain clinker;
wherein the clinker is used for extracting vanadium.
According to the invention, through reasonable design of the process, the waste is recycled by utilizing the synergistic interaction between the raw materials, the increasingly severe environment-friendly situation requirements are met, and the consumption of auxiliary materials of the rotary kiln is reduced.
As a preferable technical scheme of the invention, the additive in the step (1) comprises fly ash.
Preferably, K is contained in the fly ash2O and Na2O。
As a preferable technical scheme of the invention, K in the fly ash2The content of O is 30 to 45% by mass, and may be, for example, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, or 45%, but is not limited to the above-mentioned values, and other values not shown in the above-mentioned range are also applicable.
As a preferable technical scheme of the invention, in the fly ashNa2The content of O is 25 to 40% by mass, and may be, for example, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, or 50%, but is not limited to the above-mentioned values, and other values not shown in the above-mentioned range are also applicable.
As a preferred technical scheme of the invention, the industrial salt in the step (1) comprises sodium chloride.
In a preferred embodiment of the present invention, the mass percentage of the fly ash in the mixed material in step (1) is 3 to 30%, and may be, for example, 3%, 4%, 6%, 8%, 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, or 50%, but is not limited to the above-mentioned values, and other values not shown in the above-mentioned range are also applicable.
In a preferred embodiment of the present invention, the mass ratio of the fine slag, the mixed material, the returned slag and the sodium salt in the mixing in the step (2) is 1:0.01:0.6:0.05, 1:0.1:0.6:0.05, 1:0.2:0.6:0.05, 1:0.01:1:0.05, 1:0.01:2:0.05, 1:0.01:0.6:0.1, 1:0.01:0.6:0.2, 1:0.01:0.6:0.3, 1:0.01:0.6:0.4 or 1:0.01: 0.5, and other values are not limited to the above, and the same values are not limited to the above.
Preferably, the sodium salt comprises sodium carbonate.
Preferably, the fine slag comprises a material with the particle size of below-200 meshes, which is obtained by iron removal and crushing of vanadium slag after vanadium extraction in a steel converter.
Preferably, the return slag comprises leached slag after vanadium leaching of a vanadium-containing mineral.
As a preferred technical scheme of the invention, the roasting in the step (2) is carried out in a rotary kiln.
As a preferred embodiment of the present invention, the temperature of the calcination in the step (2) is 700 ℃ to 900 ℃, for example 700 ℃, 710 ℃, 720 ℃, 730 ℃, 740 ℃, 750 ℃, 760 ℃, 770 ℃, 780 ℃, 790 ℃, 800 ℃, 810 ℃, 820 ℃, 830 ℃, 840 ℃, 850 ℃, 860 ℃, 870 ℃, 880 ℃, 890 ℃ or 900 ℃, but not limited to the above-mentioned values, and other values not mentioned in the above-mentioned range are also applicable.
Preferably, the calcination time in step (2) is 1.5-2.5h, such as 1.5h, 1.6h, 1.7h, 1.8h, 1.9h, 2h, 2.1h, 2.2h, 2.3h, 2.4h or 2.5h, but not limited to the recited values, and other values not recited in the range are also applicable.
As a preferred technical scheme of the invention, the method comprises the following steps:
(1) mixing an additive and industrial salt to obtain a mixed material; the additive comprises fly ash; the dust removing ash contains K2O and Na2O; k in the dust removal ash2The mass content of O is 30-45%; na in the dedusting ash2The mass content of O is 25-40%; the industrial salt includes sodium chloride; the mass percentage of the fly ash in the mixed material is 3-30%;
(2) mixing the mixed material obtained in the step (1), sodium salt, fine slag and return slag, and then roasting to obtain clinker; the mass ratio of refined slag, mixed material, return slag and sodium salt in the mixing is 1 (0.01-0.2) to (0.6-2) to (0.05-0.5); the sodium salt comprises sodium carbonate; the refined slag comprises materials with the granularity of below 200 meshes, which are obtained by removing iron and crushing vanadium slag after vanadium extraction in a steel converter; the return slag comprises leaching slag after vanadium-containing mineral vanadium is leached; the roasting is carried out in a rotary kiln; the roasting temperature is 700-900 ℃; the roasting time is 1.5-2.5 h;
wherein the clinker is used for extracting vanadium.
Compared with the prior art, the invention at least has the following beneficial effects:
according to the invention, through reasonable design of the process, the recycling of the fly ash is realized by utilizing the synergistic effect of the raw materials, the increasingly severe environment-friendly situation requirements are met, and the consumption of auxiliary materials of the rotary kiln is reduced.
Detailed Description
To better illustrate the invention and to facilitate the understanding of the technical solutions thereof, typical but non-limiting examples of the invention are as follows:
example 1
The embodiment provides a roasting method for producing vanadium pentoxide, which comprises the following steps:
(1) mixing an additive and industrial salt to obtain a mixed material; the additive comprises fly ash; the dust removing ash contains K2O and Na2O; k in the dust removal ash2The mass content of O is 30 percent; na in the dedusting ash2The mass content of O is 25 percent; the industrial salt includes sodium chloride; the mass percentage of the fly ash in the mixed material is 5%;
(2) mixing the mixed material obtained in the step (1), sodium salt, fine slag and return slag, and then roasting to obtain clinker; the mass ratio of refined slag, mixed material, returned slag and sodium salt in the mixing is 1:0.1:0.8: 0.1; the sodium salt comprises sodium carbonate; the refined slag comprises materials with the granularity of below 200 meshes, which are obtained by removing iron and crushing vanadium slag after vanadium extraction in a steel converter; the return slag comprises leaching slag after vanadium-containing mineral vanadium is leached; the roasting is carried out in a rotary kiln; the roasting temperature is 800 ℃; the roasting time is 2 hours;
wherein the clinker is used for extracting vanadium.
The recovery rate of vanadium in the vanadium extraction is 85.67%.
Example 2
The embodiment provides a roasting method for producing vanadium pentoxide, which comprises the following steps:
(1) mixing an additive and industrial salt to obtain a mixed material; the additive comprises fly ash; the dust removing ash contains K2O and Na2O; k in the dust removal ash2The mass content of O is 40 percent; na in the dedusting ash2The mass content of O is 35 percent; the industrial salt includes sodium chloride; the mass percentage of the fly ash in the mixed material is 20%;
(2) mixing the mixed material obtained in the step (1), sodium salt, fine slag and return slag, and then roasting to obtain clinker; the mass ratio of refined slag, mixed material, return slag and sodium salt in the mixing is 1:0.01:2: 0.4; the sodium salt comprises sodium carbonate; the refined slag comprises materials with the granularity of below 200 meshes, which are obtained by removing iron and crushing vanadium slag after vanadium extraction in a steel converter; the return slag comprises leaching slag after vanadium-containing mineral vanadium is leached; the roasting is carried out in a rotary kiln; the roasting temperature is 700 ℃; the roasting time is 1.5 h;
wherein the clinker is used for extracting vanadium.
The recovery rate of vanadium in the vanadium extraction is 86.46%.
Example 3
The embodiment provides a roasting method for producing vanadium pentoxide, which comprises the following steps:
(1) mixing an additive and industrial salt to obtain a mixed material; the additive comprises fly ash; the dust removing ash contains K2O and Na2O; k in the dust removal ash2The mass content of O is 45 percent; na in the dedusting ash2The mass content of O is 40 percent; the industrial salt includes sodium chloride; the mass percentage of the fly ash in the mixed material is 10%;
(2) mixing the mixed material obtained in the step (1), sodium salt, fine slag and return slag, and then roasting to obtain clinker; the mass ratio of refined slag, mixed material, returned slag and sodium salt in the mixing is 1:0.2:1: 0.3; the sodium salt comprises sodium carbonate; the refined slag comprises materials with the granularity of below 200 meshes, which are obtained by removing iron and crushing vanadium slag after vanadium extraction in a steel converter; the return slag comprises leaching slag after vanadium-containing mineral vanadium is leached; the roasting is carried out in a rotary kiln; the roasting temperature is 900 ℃; the roasting time is 2.5 hours;
wherein the clinker is used for extracting vanadium.
The recovery rate of vanadium in the vanadium extraction is 85.31%.
Example 4
The embodiment provides a roasting method for producing vanadium pentoxide, which comprises the following steps:
(1) mixing an additive and industrial salt to obtain a mixed material; the additive comprises fly ash; the above-mentionedDust ash contains K2O and Na2O; k in the dust removal ash2The mass content of O is 42%; na in the dedusting ash2The mass content of O is 35 percent; the industrial salt includes sodium chloride; the mass percentage of the fly ash in the mixed material is 15%;
(2) mixing the mixed material obtained in the step (1), sodium salt, fine slag and return slag, and then roasting to obtain clinker; the mass ratio of refined slag, mixed material, return slag and sodium salt in the mixing is 1:0.1:1.5: 0.25; the sodium salt comprises sodium carbonate; the refined slag comprises materials with the granularity of below 200 meshes, which are obtained by removing iron and crushing vanadium slag after vanadium extraction in a steel converter; the return slag comprises leaching slag after vanadium-containing mineral vanadium is leached; the roasting is carried out in a rotary kiln; the roasting temperature is 850 ℃; the roasting time is 2 hours;
wherein the clinker is used for extracting vanadium.
The recovery rate of vanadium in the vanadium extraction is 87.45 percent.
Comparative example 1
The difference from example 1 is only that the fly ash accounts for 1% by mass. The recovery rate of vanadium in the vanadium extraction is 82.66%.
Comparative example 2
The only difference from example 1 is that the fly ash accounts for 50% by mass. The recovery rate of vanadium in the vanadium extraction is 81.57%.
Comparative example 3
The difference from the example 1 is only that the mass ratio of the refined slag, the mixed material, the return slag and the sodium salt in the mixing is 1:0.1:0.8: 0.8. The recovery rate of vanadium in the vanadium extraction is 81.45 percent.
Comparative example 4
The only difference from example 1 is that no vanadium slag was added in the mixing. The recovery rate of vanadium in the vanadium extraction is 80.45 percent.
Comparative example 5
Differs from example 1 only in that the additive is replaced by an equal amount of K2And O. The recovery rate of vanadium in the vanadium extraction is 81.1 percent.
Comparative example 6
The only difference from example 1 is that the additive isReplacement with an equivalent amount of Na2And O. The recovery rate of vanadium in vanadium extraction is 79 percent.
According to the results of the above examples and comparative examples, the invention realizes the recycling of the fly ash by reasonable design of the process and by utilizing the synergistic effect between the raw materials, thereby not only meeting the increasingly severe environmental protection requirements, but also reducing the consumption of auxiliary materials of the rotary kiln.
The applicant declares that the present invention illustrates the detailed structural features of the present invention through the above embodiments, but the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must be implemented depending on the above detailed structural features. It should be understood by those skilled in the art that any modifications of the present invention, equivalent substitutions of selected components of the present invention, additions of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. A roasting method for producing vanadium pentoxide, characterized in that it comprises the steps of:
(1) mixing an additive and industrial salt to obtain a mixed material;
(2) mixing the mixed material obtained in the step (1), sodium salt, fine slag and return slag, and then roasting to obtain clinker;
wherein the clinker is used for extracting vanadium.
2. The method of claim 1, wherein the additive of step (1) comprises fly ash;
preferably, K is contained in the fly ash2O and Na2O。
3. The method of claim 2, wherein K is in said fly ash2The mass content of O is 30-45%.
4. The method of claim 2, wherein said fly ash contains Na2The mass content of O is 25-40%.
5. The method of any one of claims 1-4, wherein the industrial salt of step (1) comprises sodium chloride.
6. The method according to any one of claims 1 to 5, wherein the fly ash in the mixed material in the step (1) accounts for 3 to 30 mass%.
7. The method according to any one of claims 1 to 6, wherein the mass ratio of the fine slag, the mixed material, the return slag and the sodium salt in the mixing in the step (2) is 1 (0.01-0.2): 0.6-2): 0.05-0.5;
preferably, the sodium salt comprises sodium carbonate;
preferably, the fine slag comprises a material with the particle size of below 200 meshes, which is obtained by removing iron and crushing vanadium slag after vanadium is extracted from a steel-making converter;
preferably, the return slag comprises leached slag after vanadium leaching of a vanadium-containing mineral.
8. The method of any one of claims 1 to 7, wherein the firing of step (2) is performed in a rotary kiln.
9. The method as claimed in any one of claims 1 to 8, wherein the temperature for the calcination in step (2) is 700-900 ℃;
preferably, the roasting time of the step (2) is 1.5-2.5 h.
10. A method according to any one of claims 1-9, characterized in that the method comprises the steps of:
(1) mixing an additive and industrial salt to obtain a mixed material; the additive comprises fly ash; the dust removing ash contains K2O and Na2O; k in the dust removal ash2The mass content of O is 30-45%; na in the dedusting ash2The mass content of O is 25-40%; the industrial salt includes sodium chloride; the mass percentage of the fly ash in the mixed material is 3-30%;
(2) mixing the mixed material obtained in the step (1), sodium salt, fine slag and return slag, and then roasting to obtain clinker; the mass ratio of refined slag, mixed material, return slag and sodium salt in the mixing is 1 (0.01-0.2) to (0.6-2) to (0.05-0.5); the sodium salt comprises sodium carbonate; the refined slag comprises materials with the granularity of below 200 meshes, which are obtained by removing iron and crushing vanadium slag after vanadium extraction in a steel converter; the return slag comprises leaching slag after vanadium-containing mineral vanadium is leached; the roasting is carried out in a rotary kiln; the roasting temperature is 700-900 ℃; the roasting time is 1.5-2.5 h;
wherein the clinker is used for extracting vanadium.
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| CN202010310892.0A CN111394569A (en) | 2020-04-20 | 2020-04-20 | Roasting method for producing vanadium pentoxide |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113265546A (en) * | 2021-06-02 | 2021-08-17 | 承德燕北冶金材料有限公司 | Application of dust removal ash of vanadium-nitrogen alloy pushed slab kiln |
| CN113621816A (en) * | 2021-08-17 | 2021-11-09 | 攀钢集团钒钛资源股份有限公司 | Resource utilization method of vanadium-nitrogen alloy dedusting ash |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102851487A (en) * | 2011-06-27 | 2013-01-02 | 攀钢集团有限公司 | Mixture, method for recovering ferro-vanadium bag dedusting material, and vanadium extraction method |
-
2020
- 2020-04-20 CN CN202010310892.0A patent/CN111394569A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102851487A (en) * | 2011-06-27 | 2013-01-02 | 攀钢集团有限公司 | Mixture, method for recovering ferro-vanadium bag dedusting material, and vanadium extraction method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113265546A (en) * | 2021-06-02 | 2021-08-17 | 承德燕北冶金材料有限公司 | Application of dust removal ash of vanadium-nitrogen alloy pushed slab kiln |
| CN113621816A (en) * | 2021-08-17 | 2021-11-09 | 攀钢集团钒钛资源股份有限公司 | Resource utilization method of vanadium-nitrogen alloy dedusting ash |
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