CN116875824A - Method for extracting vanadium from stone coal vanadium ore - Google Patents
Method for extracting vanadium from stone coal vanadium ore Download PDFInfo
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- CN116875824A CN116875824A CN202310939022.3A CN202310939022A CN116875824A CN 116875824 A CN116875824 A CN 116875824A CN 202310939022 A CN202310939022 A CN 202310939022A CN 116875824 A CN116875824 A CN 116875824A
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- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 86
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 239000004575 stone Substances 0.000 title claims abstract description 53
- 239000003245 coal Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000002386 leaching Methods 0.000 claims abstract description 59
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 239000008188 pellet Substances 0.000 claims abstract description 30
- 239000002893 slag Substances 0.000 claims abstract description 23
- 238000005406 washing Methods 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 claims abstract description 15
- 238000000227 grinding Methods 0.000 claims abstract description 9
- 239000000654 additive Substances 0.000 claims abstract description 7
- 230000000996 additive effect Effects 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 235000007237 Aegopodium podagraria Nutrition 0.000 claims abstract description 5
- 244000045410 Aegopodium podagraria Species 0.000 claims abstract description 5
- 235000014429 Angelica sylvestris Nutrition 0.000 claims abstract description 5
- 239000008187 granular material Substances 0.000 claims abstract description 5
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical group [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 abstract description 15
- 238000000746 purification Methods 0.000 abstract description 12
- 238000010248 power generation Methods 0.000 abstract description 9
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract description 4
- 238000006386 neutralization reaction Methods 0.000 abstract description 3
- 239000002956 ash Substances 0.000 description 19
- 229910052799 carbon Inorganic materials 0.000 description 13
- 239000002002 slurry Substances 0.000 description 7
- 238000000605 extraction Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 239000008235 industrial water Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000010883 coal ash Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- 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
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The application discloses a method for extracting vanadium from stone coal vanadium ores, which comprises the following steps: crushing and grinding ash slag generated after stone coal vanadium ore combustion power generation; adding the ground ash into an additive to granulate pellets and drying to obtain pellets; roasting the pellets by adopting a roasting furnace to obtain clinker; the clinker ball breaking is stirred and leached after normal temperature sulfuric acid pretreatment; and after the leaching is finished, carrying out solid-liquid separation, washing leaching residues, and returning the generated washing liquid to pretreatment and leaching. The method takes the ash slag after the stone coal vanadium ore combustion power generation as the raw material, reduces the requirement on the granularity of the ash slag when extracting vanadium from the ash slag, and reduces the difficulty of solid-liquid separation; the method has low acid consumption and low requirements on corrosion resistance of equipment, the pH of the leaching solution is suitable for direct purification and enrichment without neutralization treatment, and meanwhile, the impurity content of the leaching solution is low, so that the later purification and enrichment difficulty is reduced; the method has low acid consumption and is environment-friendly in site operation. The method can be popularized to other vanadium ores, and has wide application prospect.
Description
Technical Field
The application relates to the technical field of vanadium metallurgy, in particular to a method for extracting vanadium from stone coal vanadium ores.
Background
The vanadium-containing stone coal is an important vanadium ore resource, has extremely rich stone coal vanadium ore reserves in China, utilizes stone coal vanadium ore to extract vanadium and further prepare vanadium products, and is one of important directions of development and utilization of vanadium resources in China. The calorific value of the stone coal vanadium ore is not high, the fluctuation range is large, and the stone coal vanadium ore with high carbon content tends to have low vanadium content due to the ore forming characteristic of the stone coal vanadium ore. The high-carbon stone coal is directly used for extracting vanadium, the heat energy of the vanadium cannot be effectively recovered, sintering is easy to occur due to inaccurate temperature control during roasting, vanadium can be wrapped in a glass phase, in addition, residual carbon can be covered on the surface of minerals in the leaching process, the carbon has hydrophobicity, the vanadium extraction is extremely unfavorable, and finally the cost of the vanadium extraction is increased. Therefore, the high-carbon stone coal is generally utilized to generate electricity, and then the generated ash slag is used for extracting vanadium, so that the heat energy of the stone coal can be fully utilized to improve the economic benefit of the comprehensive utilization of the high-carbon stone coal, and the method is an effective way for realizing the comprehensive utilization of vanadium and carbon resources of the high-carbon stone coal, and has positive effects on the development of the stone coal vanadium extraction industry in China.
At present, the research on the extraction of vanadium from the high-carbon stone coal power generation ash slag in the industry is relatively less, a direct acid leaching process is generally adopted, the leaching time is 16 hours under the conditions that the leaching rate of vanadium is considerable, the sulfuric acid consumption is 30-50% and the leaching temperature is 90 ℃, and meanwhile, the leaching time can be shortened if the leaching temperature is 110-120 ℃.
The following disadvantages exist in the adoption of the direct acid leaching process: (1) The acid consumption is too high, a large amount of acid mist is generated, and the like, so that the field operation environment is poor, and the environmental protection pressure is high; (2) The acid concentration is too high, so that a large amount of other impurity ions with higher content are generated in the leached vanadium liquid, and the later purification and enrichment pressure is high; (3) The acid concentration is high, so that the solid-liquid separation is difficult, and the production efficiency is reduced; (4) The acid concentration is high, the leaching temperature is high, the requirement on the corrosion resistance of equipment is extremely high, and the production cost is increased intangibly.
In addition, there is a roasting-acid leaching method, in order to ensure a considerable leaching rate, ash slag is finely ground to 13 mu m (1000 meshes), air is introduced during roasting to strengthen oxidation, and then leaching is carried out under stirring.
The following disadvantages exist in the roasting-acid leaching method: (1) The ash residue granularity is extremely strict, the ash residue granularity is required to be processed to 13 mu m, the requirement on ore grinding equipment is extremely high, and the potential safety hazard is increased while the production cost is extremely high; (2) The granularity is too fine, the solid-liquid separation after leaching is very difficult, and the industrial continuous production is difficult to realize.
Disclosure of Invention
The application provides a method for extracting vanadium from stone coal vanadium ores, and aims to solve the problems in the prior art.
The technical scheme provided by the application is as follows:
a method for extracting vanadium from stone coal vanadium ore comprises the following steps:
(1) Burning stone coal vanadium ore to generate electricity, and crushing and grinding the generated ash slag;
(2) Adding the ground ash into an additive to granulate pellets and drying to obtain pellets;
(3) Roasting the pellets by adopting a roasting furnace to obtain clinker;
(4) The clinker ball breaking is stirred and leached after normal-temperature sulfuric acid pretreatment;
(5) And after the leaching is finished, carrying out solid-liquid separation, washing leaching residues, and returning the generated washing liquid to pretreatment and leaching.
Further, the stone coal vanadium ore in the step (1) contains V 2 O 5 ≥0.80％、TC≥6％。
Further, in the step (1), the clinker is crushed and ground until the granularity is-0.074 mm and the proportion is 55-70%.
Further, in the step (2), the additive is barium sulfate, the barium sulfate accounts for 1-3% of the mass of the ground raw material, and the diameter of the pellets is 5-15 mm.
Further, the pellet is baked by adopting a baking furnace, specifically:
heating the pellets to 630-710 ℃ from room temperature along with a roasting furnace, and preserving heat for 1-3 h; then heating to 850-925 ℃ and preserving heat for 10-14 h; and cooling the clinker for 10-16 h to 430-480 ℃ along with the roasting furnace after heat preservation, and finally taking out the clinker and cooling the clinker in the atmospheric environment.
Further, the sulfuric acid pretreatment and leaching in the step (4) have a total water volume (m 3 ) The quality of sulfuric acid for sulfuric acid pretreatment is 1-3 times of the clinker quality (kg), the quality of sulfuric acid for sulfuric acid pretreatment is 6-8% of the clinker quality, the water quantity added during pretreatment is 30-75% of the clinker quality, the pretreatment temperature is normal temperature, the time is 1-2 h, the leaching time is 0.5-1 h, and the temperature is normal temperature-60 ℃.
Compared with the prior art, the application has the beneficial effects that:
the application provides a method for extracting vanadium from stone coal vanadium ore, which takes high-carbon stone coal ash as a raw material, reduces the requirement on ash granularity when extracting vanadium from the high-carbon stone coal ash, and reduces the difficulty of solid-liquid separation; the method has low acid consumption and low requirements on corrosion resistance of equipment, the pH of the leaching solution is suitable for direct purification and enrichment without neutralization treatment, and meanwhile, the impurity content of the leaching solution is low, so that the later purification and enrichment difficulty is reduced; the method has low acid consumption and is environment-friendly in site operation. The method provided by the application can be popularized to other vanadium ores, and has wide application prospect.
Drawings
Fig. 1 is a process flow chart of a method for extracting vanadium from stone coal vanadium ores.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the embodiments described below are some, but not all, embodiments of the application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Accordingly, the following detailed description of the embodiments of the application, taken in conjunction with the accompanying drawings, is intended to represent only selected embodiments of the application, and not to limit the scope of the application as claimed. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on the embodiments of the present application, are within the scope of the present application. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present application.
The embodiment of the application provides a method for extracting vanadium from stone coal vanadium ores, which comprises the following steps: crushing and grinding raw materials from stone coal vanadium ores; adding the ground ash into an additive to granulate pellets and drying to obtain pellets; roasting the pellets by adopting a roasting furnace to obtain clinker; the clinker ball breaking is stirred and leached after normal temperature sulfuric acid pretreatment; and after the leaching is finished, carrying out solid-liquid separation, washing leaching residues, and returning the generated washing liquid to pretreatment and leaching.
In order to improve the economic benefit of comprehensive utilization of stone coal vanadium ore, the stone coal vanadium ore is required to be roasted, heat generated by roasting can be used for generating electricity, and high-carbon stone coal power generation ash slag generated by roasting is the raw material required by the application. The method for extracting vanadium from stone coal vanadium ore provided by the application can be used in combination with stone coal vanadium ore power generation, firstly, the stone coal vanadium ore is combusted to generate power, and then the generated power generation ash slag is subjected to the vanadium extraction operation.
Example 1
Referring to fig. 1, the embodiment provides a method for extracting vanadium from stone coal vanadium ore, which comprises the following specific steps:
(1) And crushing and grinding the ash slag generated by the combustion and power generation of stone coal vanadium ore until the granularity is-0.074 mm and the proportion is 65%.
(2) 3% barium sulfate and a proper amount of industrial water are mixed into ash slag in the step (1) to carry out granulation and balling, so as to obtain pellets with the diameter of 5-8 mm, and the moisture in the pellets is dried.
(3) Placing the pellets in the step (2) in a roasting furnace for roasting, heating to 650 ℃ from room temperature along with the furnace, and preserving heat for 2h; then heating to 880 ℃, and preserving heat for 14h; and cooling the clinker for 14h to 450 ℃ along with the furnace after heat preservation, and finally taking out the clinker and cooling the clinker in the atmospheric environment.
(4) The clinker in the step (3) is pretreated and leached by sulfuric acid at normal temperature, and the total water volume (m 3 ) The quality of the pretreated sulfuric acid is 7 percent of the clinker quality (kg), the water quantity added during pretreatment is 50 percent of the clinker quality, and the residual water is added into the slurry for agitation leaching after the pretreatment is finished, wherein the pretreatment temperature is normal temperature, the time is 1h, the leaching time is 0.5h, and the temperature is 60 ℃.
(5) And (3) carrying out solid-liquid separation on the slurry in the step (4), collecting leaching liquid for subsequent purification and enrichment, washing leaching slag, returning the generated washing liquid to the step (4), and carrying out pretreatment leaching again.
In the step (5), after solid-liquid separation is carried out on the slurry, precious liquid and leaching slag are respectively obtained, the precious liquid (i.e. leaching liquid) is collected for subsequent purification and enrichment, the leaching slag is washed to generate tailings and washing liquid, the washing liquid is returned to the step (4), and normal-temperature sulfuric acid pretreatment and leaching are carried out again. Therefore, the utilization rate of raw materials can be improved, and the cost is saved.
The components and pH of the resulting leachate are shown in Table 1, and the content units in Table 1 are g.L -1 。
TABLE 1 leachate composition and pH
| Element(s) | V 2 O 5 | P | CaO | MgO | K 2 O | Na 2 O | SiO 2 | TFe | Al 2 O 3 | pH |
| Content of | 5.87 | 1.57 | 0.68 | 1.84 | 0.94 | 0.30 | 2.65 | 0.35 | 3.94 | 2.3 |
Example two
The embodiment provides a method for extracting vanadium from stone coal vanadium ores, which comprises the following specific steps:
(1) And crushing and grinding the ash slag generated by the combustion and power generation of stone coal vanadium ore until the granularity is-0.074 mm and the proportion is 70%.
(2) Adding 2% barium sulfate and a proper amount of industrial water into the ash slag in the step (1) to carry out granulation and balling to obtain pellets with the diameter of 9-13 mm, and drying the moisture in the pellets.
(3) Placing the pellets in the step (2) in a roasting furnace for roasting, heating to 700 ℃ from room temperature along with the furnace, and preserving heat for 2 hours; then heating to 900 ℃, and preserving heat for 12 hours; and cooling the clinker for 13h to 470 ℃ along with the furnace after heat preservation, and finally taking out the clinker and cooling the clinker in the atmospheric environment.
(4) The clinker in the step (3) is pretreated and leached by sulfuric acid at normal temperature, and the total water volume (m 3 ) The quality of the pretreated sulfuric acid is 7 percent of the clinker quality (kg), the water quantity added during pretreatment is 70 percent of the clinker quality, and the residual water is added into the slurry for stirring leaching after the pretreatment is finished, wherein the pretreatment temperature is normal temperature, the time is 1.5h, the leaching time is 1h, and the temperature is 40 ℃.
(5) And (3) carrying out solid-liquid separation on the slurry in the step (4), collecting leaching liquid for subsequent purification and enrichment, washing leaching slag, returning the generated washing liquid to the step (4), and carrying out pretreatment and leaching again.
The composition and pH of the resulting leachate are shown in Table 2, and the content unit in Table 2 is g.L -1 。
TABLE 2 leachate composition and pH
| Element(s) | V 2 O 5 | P | CaO | MgO | K 2 O | Na 2 O | SiO 2 | TFe | Al 2 O 3 | pH |
| Content of | 5.94 | 1.48 | 0.61 | 1.72 | 0.83 | 0.29 | 2.43 | 0.21 | 3.46 | 2.2 |
Example III
The embodiment provides a method for extracting vanadium from stone coal vanadium ores, which comprises the following specific steps:
(1) The clinker from stone coal vanadium ore is crushed and ground to-0.074 mm with the proportion of 55 percent.
(2) Adding 1.5% barium sulfate and a proper amount of industrial water into the ash slag in the step (1) to carry out granulation and balling to obtain pellets with the diameter of 10-15 mm, and drying the moisture in the pellets.
(3) Placing the pellets in the step (2) in a roasting furnace for roasting, heating to 700 ℃ from room temperature along with the furnace, and preserving heat for 1.5h; then heating to 925 ℃ and preserving heat for 10 hours; and cooling the clinker for 12 to 460 ℃ along with the furnace after heat preservation, and finally taking out the clinker and cooling the clinker in the atmospheric environment.
(4) The clinker in the step (3) is pretreated and leached by sulfuric acid at normal temperature, and the total water volume (m 3 ) The quality of the sulfuric acid for pretreatment is 8 percent of the quality of the clinker, the water quantity added during pretreatment is 35 percent of the quality of the clinker, and the residual water is added into the slurry for stirring leaching after the pretreatment is finished, wherein the pretreatment temperature is normal temperature, the time is 2h, the leaching time is 0.8h, and the temperature is normal temperature.
(5) And (3) carrying out solid-liquid separation on the slurry in the step (4), collecting leaching liquid for subsequent purification and enrichment, washing leaching slag, returning the generated washing liquid to the step (4), and carrying out pretreatment and leaching again.
The composition and pH of the resulting leachate are shown in Table 3, and the content unit in Table 3 is g.L -1 。
TABLE 3 leachate composition and pH
| Element(s) | V 2 O 5 | P | CaO | MgO | K 2 O | Na 2 O | SiO 2 | TFe | Al 2 O 3 | pH |
| Content of | 5.62 | 1.23 | 082 | 1.45 | 0.61 | 0.19 | 2.23 | 0.19 | 2.95 | 2.0 |
In the above examples, V is contained in stone coal vanadium ore 2 O 5 ≥0.80％、TC≥6％。
In summary, the embodiment of the application provides a method for extracting vanadium from stone coal vanadium ores, which comprises the following steps: burning stone coal vanadium ore to generate electricity, and crushing and grinding the generated ash slag; adding the ground ash into an additive to granulate pellets and drying to obtain pellets; roasting the pellets by adopting a roasting furnace to obtain clinker; the clinker ball breaking is stirred and leached after normal temperature sulfuric acid pretreatment; and after the leaching is finished, carrying out solid-liquid separation, washing leaching residues, and returning the generated washing liquid to pretreatment and leaching. The method solves the problems of extremely high ash particle size requirement, high acid consumption, difficult solid-liquid separation, large later purification and enrichment difficulty, unfriendly environment and the like in the existing high-carbon stone coal power generation ash vanadium extraction process.
Compared with the prior art, the application has the beneficial effects that:
1. the ash particle size is controlled to be-0.074 mm and accounts for 55% -70%, the requirement on the ash particle size is low, and the solid-liquid separation is easy.
2. The application has low acid consumption and low requirements on corrosion resistance of equipment, and reduces the cost of frequent maintenance or replacement of leaching equipment; meanwhile, the impurity content of the leaching solution is low, and the later purification and enrichment difficulty is low; in addition, the field operation is environment-friendly.
3. The pH of the leaching solution is suitable for direct purification and enrichment without a neutralization process.
4. The method provided by the application can be popularized to other vanadium ores, and has wide application prospect.
It is to be understood that the above-described embodiments of the present application are merely illustrative of or explanation of the principles of the present application and are in no way limiting of the application. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application should be included in the scope of the present application. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.
Claims (6)
1. The method for extracting vanadium from stone coal vanadium ore is characterized by comprising the following steps:
(1) Burning stone coal vanadium ore to generate electricity, and crushing and grinding the generated ash slag;
(2) Adding the ground ash into an additive to granulate pellets and drying to obtain pellets;
(3) Roasting the pellets by adopting a roasting furnace to obtain clinker;
(4) The clinker ball breaking is stirred and leached after normal-temperature sulfuric acid pretreatment;
(5) And after the leaching is finished, carrying out solid-liquid separation, washing leaching residues, and returning the generated washing liquid to pretreatment and leaching.
2. The method for extracting vanadium from stone coal vanadium ore according to claim 1, wherein the stone coal vanadium ore in the step (1) contains V 2 O 5 ≥0.80％、TC≥6％。
3. The method for extracting vanadium from stone coal vanadium ore according to claim 1, wherein in the step (1), the ash slag is crushed and ground to a particle size of-0.074 mm with a ratio of 55% -70%.
4. The method for extracting vanadium from stone coal vanadium ore according to claim 1, wherein in the step (2), the additive is barium sulfate, the proportion of the barium sulfate is 1% -3% of the mass of the raw material after ore grinding, and the diameter of the pellets is 5-15 mm.
5. The method for extracting vanadium from stone coal vanadium ore according to any one of claims 1 to 4, wherein the roasting furnace is used for roasting the pellets, specifically:
heating the pellets to 630-710 ℃ from room temperature along with a roasting furnace, and preserving heat for 1-3 h; then heating to 850-925 ℃ and preserving heat for 10-14 h; and cooling the clinker for 10-16 h to 430-480 ℃ along with the roasting furnace after heat preservation, and finally taking out the clinker and cooling the clinker in the atmospheric environment.
6. The method for extracting vanadium from stone coal vanadium ore according to claim 5, wherein the sulfuric acid pretreatment and leaching in the step (4) have a total water volume (m 3 ) The quality of sulfuric acid for sulfuric acid pretreatment is 1-3 times of the clinker quality (kg), the quality of sulfuric acid for sulfuric acid pretreatment is 6-8% of the clinker quality, the water quantity added during pretreatment is 30-75% of the clinker quality, the pretreatment temperature is normal temperature, the time is 1-2 h, the leaching time is 0.5-1 h, and the temperature is normal temperature-60 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310939022.3A CN116875824A (en) | 2023-07-27 | 2023-07-27 | Method for extracting vanadium from stone coal vanadium ore |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310939022.3A CN116875824A (en) | 2023-07-27 | 2023-07-27 | Method for extracting vanadium from stone coal vanadium ore |
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| CN116875824A true CN116875824A (en) | 2023-10-13 |
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| CN202310939022.3A Pending CN116875824A (en) | 2023-07-27 | 2023-07-27 | Method for extracting vanadium from stone coal vanadium ore |
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