CN118516569A - Harmless recycling method for stone coal vanadium extraction tailings - Google Patents
Harmless recycling method for stone coal vanadium extraction tailings Download PDFInfo
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- CN118516569A CN118516569A CN202410850186.3A CN202410850186A CN118516569A CN 118516569 A CN118516569 A CN 118516569A CN 202410850186 A CN202410850186 A CN 202410850186A CN 118516569 A CN118516569 A CN 118516569A
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- vanadium
- tailings
- vanadium extraction
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- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 301
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 294
- 238000000605 extraction Methods 0.000 title claims abstract description 132
- 239000003245 coal Substances 0.000 title claims abstract description 71
- 239000004575 stone Substances 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000004064 recycling Methods 0.000 title claims abstract description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 69
- 239000002826 coolant Substances 0.000 claims abstract description 50
- 238000003860 storage Methods 0.000 claims abstract description 43
- 229910052742 iron Inorganic materials 0.000 claims abstract description 36
- 239000002893 slag Substances 0.000 claims abstract description 27
- 238000009628 steelmaking Methods 0.000 claims abstract description 26
- 238000003825 pressing Methods 0.000 claims abstract description 24
- 239000011230 binding agent Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims description 26
- 239000000428 dust Substances 0.000 claims description 21
- 239000000853 adhesive Substances 0.000 claims description 19
- 230000001070 adhesive effect Effects 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 19
- 238000001035 drying Methods 0.000 claims description 13
- 239000008188 pellet Substances 0.000 claims description 13
- 239000002390 adhesive tape Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 8
- 238000002386 leaching Methods 0.000 claims description 7
- 238000003723 Smelting Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 5
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims description 4
- 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 claims description 3
- 230000002308 calcification Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 13
- 239000002184 metal Substances 0.000 abstract description 12
- 238000007711 solidification Methods 0.000 abstract description 2
- 230000008023 solidification Effects 0.000 abstract description 2
- 239000002956 ash Substances 0.000 description 25
- 229920000881 Modified starch Polymers 0.000 description 6
- 239000004368 Modified starch Substances 0.000 description 6
- 239000010881 fly ash Substances 0.000 description 6
- 235000019426 modified starch Nutrition 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910000805 Pig iron Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000000571 coke Substances 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000011265 semifinished product Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229920000876 geopolymer Polymers 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- LPUQAYUQRXPFSQ-DFWYDOINSA-M monosodium L-glutamate Chemical compound [Na+].[O-]C(=O)[C@@H](N)CCC(O)=O LPUQAYUQRXPFSQ-DFWYDOINSA-M 0.000 description 1
- 235000013923 monosodium glutamate Nutrition 0.000 description 1
- 239000004223 monosodium glutamate Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 description 1
- 239000011782 vitamin Substances 0.000 description 1
- 229940088594 vitamin Drugs 0.000 description 1
- 229930003231 vitamin Natural products 0.000 description 1
- 235000013343 vitamin Nutrition 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
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
- C21C2007/0062—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires with introduction of alloying or treating agents under a compacted form different from a wire, e.g. briquette, pellet
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C2200/00—Recycling of waste material
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
According to the harmless recycling method for the stone coal vanadium ore vanadium extraction tailings, the stone coal vanadium extraction tailings and the vanadium extraction converter dry dedusting ash are mixed uniformly by adding a binder according to a proportion, a cold pressing bonding solidification forming process is adopted, the stone coal vanadium ore vanadium extraction tailings and the vanadium extraction converter dry dedusting ash are pressed by a ball pressing machine and then dried to form a vanadium-containing cooling agent with high iron and vanadium content, uniform granularity and good strength, when vanadium-containing molten iron produced by a blast furnace method is smelted by a vanadium extraction converter, the vanadium-containing cooling agent is added into the vanadium extraction converter, vanadium in the vanadium-containing cooling agent enters the converter vanadium slag for recycling, and iron in the vanadium-containing cooling agent enters semisteel to improve the metal yield. The vanadium-containing coolant disclosed by the invention is uniform in components, proper in granularity and high in strength, not only can effectively absorb the storage quantity of the tailings of the stone coal extracted vanadium ore, solve the problem of the storage capacity of the tailings, but also can realize the secondary utilization of the tailings resources, improve the grade of vanadium slag in vanadium extraction steelmaking and the yield of semisteel metal, and simultaneously realize the purpose of recycling in a dry dedusting ash furnace of a vanadium extraction converter.
Description
Technical Field
The invention belongs to the technical field of mineral resource recycling, and particularly relates to a harmless recycling method for tailings of vanadium extraction from stone coal vanadium ores.
Background
Vanadium metal is very widely used in modern industry, and is called "monosodium glutamate" and "metal vitamins" in modern industry. The main emplacement minerals of vanadium include vanadium titano-magnetite, stone coal vanadium ore, vanadium lead ore and the like, the stone coal vanadium ore resources of China are very rich, wherein the reserve of V 2O5 is approximately 1.18 hundred million tons, which accounts for 87% of the total reserve of V 2O5 of China, and is 6.7 times of the reserve of V 2O5 in the vanadium titano-magnetite.
Because the V 2O5 content in stone coal vanadium ore is only 0.95%, the vanadium content is low, a large amount of tailings are generated after vanadium extraction, and the environment is seriously polluted, the comprehensive treatment and the recycling utilization of vanadium extraction pollutants become the bottleneck of the development of stone coal vanadium extraction industry.
In the prior art, according to the ore characteristics of stone coal vanadium ores, the main utilization direction is biased to recycle silicon and aluminum elements in tailings, and most of researches are focused on the utilization prospect of the stone coal vanadium ores in the directions of cement and building materials. Researches show that the vanadium slag is used as a cement mixture for cement production, so that the cement setting time can be prolonged, and the production cost can be reduced; in view of the fact that the vanadium extraction tailings contain Si and Al elements, the alkali-activated cementing material can be prepared, and the source of geopolymer raw materials is widened; the white carbon black can also be prepared by adopting a precipitation method for utilizing the vanadium extraction tailings; the stone coal vanadium ore tailings for extracting vanadium can be used for preparing the baking-free ceramsite or the baking-free brick, and certain economic benefits are achieved.
The existing stone coal vanadium ore vanadium extraction process mainly comprises sodium treatment or calcification roasting-leaching vanadium extraction, and the different roasting processes have great influence on the utilization research of tailings, so that the comprehensive utilization is not facilitated. Therefore, the existing treatment of vanadium extraction tailings adopts a piling mode, which not only occupies a large amount of land resources, but also brings serious environmental problems, and a harmless resource utilization mode of new stone coal vanadium ore vanadium extraction tailings needs to be continuously discovered and explored.
The method for extracting vanadium from vanadium titano-magnetite in China mainly adopts a mode of smelting vanadium-containing molten iron by a blast furnace method and then producing vanadium slag in converter steelmaking, and a cooling agent in the process of extracting vanadium from the converter steelmaking is very important, but in the prior art, the cooling agent mainly comprises iron ore and iron scale (CN 116356103 A,CN 109957635 A,CN 112593040A).
The invention patent application with publication number CN 114410876A discloses a vanadium extraction coolant and a preparation method and application thereof, the method takes vanadium-titanium powder, external mineral powder, vanadium extraction tailings and cold return ores as raw materials, wherein the vanadium extraction tailings comprise tailings after vanadium extraction by leaching, the low-calcium acid sinter meeting the vanadium extraction procedure is produced by changing the composition of the coolant and optimizing a proportioning structure, the stable vanadium slag components and the vanadium extraction cold materials are substituted into vanadium, the vanadium extraction procedure is matched with the vanadium extraction cold materials, the matched eating amount is gradually improved, the stable structure of the vanadium extraction cold materials is achieved, the effect of reducing cost and improving efficiency is achieved, but the main vanadium extraction tailings are only 5-6% in the method, the stone coal vanadium extraction tailings cannot be effectively and harmlessly treated, the process is complex, and the resource utilization rate is not high.
Disclosure of Invention
The invention aims to provide a harmless recycling method for stone coal vanadium ore vanadium extraction tailings, which aims to solve the technical problems that the method in CN 114410876A is used for treating a large amount of stone coal vanadium ore vanadium extraction tailings, a sintering machine is adopted for forming a cooling agent, the process is complex, and the resource utilization rate is low, so that metal elements such as vanadium, iron and the like in the stone coal vanadium ore vanadium extraction tailings are recycled.
In order to achieve the purpose, the invention adopts the following technical scheme:
The invention provides a harmless recycling method of stone coal vanadium extraction tailings, which is characterized in that stone coal vanadium extraction tailings and vanadium extraction converter dry dedusting ash are uniformly mixed by adding a binder according to a proportion, a cold pressing bonding solidification forming process is adopted, the stone coal vanadium extraction tailings and the vanadium extraction converter dry dedusting ash are pressed by a ball pressing machine and then dried to form a vanadium-containing cooling agent with high iron and vanadium content, uniform granularity and good strength, when vanadium-containing molten iron produced by a blast furnace method is smelted by a vanadium extraction converter, the vanadium-containing cooling agent is added into the vanadium extraction converter, vanadium in the vanadium-containing cooling agent enters the converter vanadium slag for recycling, and iron in the vanadium-containing cooling agent enters semisteel to improve the metal yield; the method specifically comprises the following steps:
Step one, raw material preparation: uniformly mixing stone coal vanadium ore vanadium extraction tailings and vanadium extraction converter dry dedusting ash with an adhesive according to a proportion to obtain a mixture; wherein, the vanadium extraction tailings of stone coal vanadium ore are 55 to 75 weight percent, the dedusting ash is 20 to 40 weight percent, and the binder is 5 percent;
Step two, mixing, ball pressing and drying: pressing the mixture obtained in the step one into pellets, and drying the pressed and formed cold bonded pellets to obtain a vanadium-containing coolant with the water content less than or equal to 3%;
step three, extracting vanadium from a converter: adding molten iron obtained by smelting vanadium titano-magnetite by a blast furnace method into a vanadium extraction converter for steelmaking, adding the vanadium-containing coolant according to a cooling system, keeping the temperature of a molten pool stably rising, and controlling the temperature of the molten pool at 1376-1386 ℃ at the vanadium extraction end point to obtain qualified vanadium slag and semisteel;
step four, recycling dry dedusting ash: the vanadium extraction steelmaking converter is provided with a dry dust remover in a matching way, and is used for capturing and purifying dust generated in the vanadium extraction steelmaking, and the obtained dry dust is recycled to the step one.
As a further preferable mode of the technical scheme of the invention, the stone coal vanadium ore vanadium extraction tailings are tailings obtained after extracting vanadium by a sodium modification/calcification roasting-leaching method, and the mass percentages of the components are as follows: 35-65% of TFe; 1-2% of SiO 2 8～25%;V2O5; the balance of MgO, al 2O3、Cr2O3, mnO and other impurities.
Further, the recycling method is realized through a harmless recycling system, and the harmless recycling system comprises a raw material unit, a mixed ball pressing unit and a converter vanadium extraction unit;
The raw material unit comprises a tailings storage bin, a dust-removing ash storage bin and an adhesive storage bin, and the bottom discharge ports of the tailings storage bin, the dust-removing ash storage bin and the adhesive storage bin are respectively communicated with the feed inlet of the collecting scraper machine; the mixing ball pressing unit comprises a mixing bin, a feeding hole of the mixing bin is positioned below a discharging hole of the collecting scraper, the discharging hole of the mixing bin is communicated with a feeding hole of an edge runner, the edge runner is sequentially connected with a ball pressing machine and a dryer, and the discharging hole of the dryer is communicated with a feeding hole at the bottom of the bucket elevator; the converter vanadium extraction unit comprises a converter bin positioned below a top discharge hole of the bucket elevator, and a bottom discharge hole of the converter bin is communicated with a vanadium extraction converter feed inlet.
Further, the discharge ports at the bottoms of the tailing storage bin, the dedusting ash storage bin and the adhesive storage bin are respectively communicated with the feed inlet of the collecting scraper machine through a first batching metering belt, a second batching metering belt and a third batching metering belt.
Further, the discharge port of the mixing bin is communicated with the feed inlet of the wheel mill through a star feeder.
Further, the discharge port of the wheel mill is connected with a ball pressing machine through a first conveying adhesive tape, and the ball pressing machine is connected with a dryer through a second conveying adhesive tape.
Further, the converter bin is communicated with a feed inlet of the vanadium extracting converter through a vibration feeding mechanism.
Compared with the prior art, the invention has the following advantages:
According to the invention, the stone coal vanadium ore extracting tailings and the dry dedusting ash cold-setting compression balls of the vanadium extracting converter are used as the vanadium-containing coolant for extracting vanadium and steelmaking, so that the storage quantity of the stone coal extracting tailings can be effectively reduced, the problem of the tailing storage capacity can be solved, the secondary utilization of tailings resources can be realized, the vanadium slag grade of the vanadium extracting and steelmaking and the semisteel metal yield can be improved, and the purpose of recycling in the dry dedusting ash furnace of the vanadium extracting converter can be realized.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a schematic diagram of the harmless recycling system of the present invention;
In the figure: 1. a tailings storage bin; 2. a dust collection storage bin; 3. an adhesive storage bin; 4. a first furnish metering belt; 5. a second ingredient metering belt; 6. a third batch metering belt; 7. collecting scraper machine; 8. a mixing bin; 9. a star feeder; 10. an edge runner; 11. a first conveying adhesive tape; 12. a second conveying adhesive tape; 13. ball press; 14. a dryer; 15. a bucket elevator; 16. a converter high-level bin; 17. a vibratory feeding mechanism; 18. a vanadium extraction converter; 19. a dry dust collector.
Detailed Description
The invention will be described in detail with reference to the following examples for a thorough understanding of the objects, features and effects of the invention.
Example 1
As shown in fig. 1, a certain stone coal vanadium ore vanadium extraction factory adopts a sodium salt roasting-water leaching method to extract vanadium from stone coal vanadium ore, and the obtained stone coal vanadium ore vanadium extraction tailings are shown in the following table (mass percent):
The stone coal vanadium ore vanadium extraction tailings contain 47.14 mass percent of Fe 2O3 and 1.55 mass percent of V 2O5, and have higher content of iron and vanadium elements. The method comprises the steps of adding binder into the stone coal vanadium extraction tailings, and mixing uniformly the stone coal vanadium extraction tailings, the dust removal ash of 23wt% and the binder of 5% according to a proportion.
As shown in figure 1, the raw materials are pressed into pellets, and the pressed and formed cold-bonded pellets are dried to obtain the vanadium-containing coolant with the water content of 3 percent, wherein the content of TFe in the vanadium-containing coolant is 59.62 percent, the content of V 2O5 is 0.62 percent, the granularity is 5-30 mm, the iron and vanadium contents are high, the granularity is uniform, and the strength is good.
In the process of FIG. 1, molten iron obtained by smelting vanadium titano-magnetite by a blast furnace method, wherein the content of V in the molten iron is 0.22%, 119t vanadium-containing molten iron and 5.8t pig iron blocks are filled into a 120-ton vanadium extracting converter, 22Kg/t steel of the vanadium-containing coolant is added according to a cooling system during oxygen supply, the temperature rising speed of a molten pool is controlled, the temperature of the molten pool is steadily increased, the temperature of the molten pool at the vanadium extracting end point is controlled at 1376 ℃, qualified vanadium slag and semi-steel are obtained, the grade of V 2O5 in the vanadium slag is 17.21%, the vanadium slag is improved by 0.55% compared with the furnace without the vanadium-containing coolant, and the metal yield of the semi-steel is improved by 0.2%.
The converter for extracting vanadium and steelmaking is provided with a dry dust remover in a matching way, so as to collect and purify dust generated in the process of extracting vanadium and steelmaking, and the obtained dry dust remover is recycled.
As shown in fig. 2, the required stone coal vanadium extraction tailings are transported to a workshop site through a dump truck, and after screening, the screened matters enter a tailings storage bin 1; the dedusting ash generated by the dry-method deduster 19 of the vanadium extraction converter steelmaking is sent to a dedusting ash storage bin 2 through a suction and discharge vehicle, the average TFe content of the dedusting ash is 57.26%, and the TFe and vanadium content in the raw materials are high; selecting a modified starch binder to be sent to a binder storage bin 3; the stone coal vanadium extraction tailings are conveyed to a raw material collection scraper machine 7 through a first batching metering belt 4 arranged in a tailings storage bin 1; the fly ash is conveyed to a raw material collection scraper machine 7 through a second batching metering belt 5 arranged in the fly ash storage bin 2; the modified starch adhesive is transported to a raw material collection scraper 7 by a third batching metering belt 6 provided in the adhesive storage bin 3.
As shown in fig. 2, the raw materials are fed into a mixing bin 8 after being mixed by a collecting scraper 7, are fed into an edge runner 10 by a star feeder 9, are uniformly mixed by the edge runner 10, and are quantitatively fed into a ball pressing machine 13 by a first conveying adhesive tape 11 to be pressed into balls. And conveying the pressed semi-finished product balls to a dryer 14 through a second conveying adhesive tape 12 for drying treatment, wherein the dryer adopts a pellet vertical dryer, a drying heat source adopts coke oven gas, the drying temperature is controlled to be about 300 ℃, and the water content of the dried finished product balls is less than or equal to 3 percent. The finally generated vanadium-containing coolant has uniform components, proper granularity and high strength, and can be added as a coolant when the vanadium extraction converter steelmaking, so that the heating speed of a molten pool can be effectively controlled, the vanadium oxidation rate is improved, the FeO content of the final slag is reduced, and the semisteel yield is improved.
As shown in fig. 2, the vanadium-containing cooling agent after ball pressing is filled into a converter high-level bin 16 through a bucket elevator 15, vanadium-containing molten iron obtained through a blast furnace method is filled into a vanadium extraction converter 18, the vanadium-containing cooling agent pressed into balls is added into the vanadium extraction converter 18 through a vibration feeding mechanism 17 in the vanadium extraction steelmaking process, the end temperature of vanadium extraction is controlled at 1386 ℃ of the selective oxidation temperature of C and V elements by adjusting the addition amount of the vanadium-containing cooling agent, vanadium slag is obtained, and flue gas generated in the vanadium extraction process is purified through a dry dust collector 19. The stone coal vanadium extraction tailings are pressed into balls and then added as a cooling agent of the vanadium extraction converter, so that the grade of vanadium in the vanadium slag and the metal yield of semisteel are improved, the iron and vanadium of the stone coal vanadium extraction tailings are recycled, the stone coal vanadium extraction tailings are treated harmlessly, and the environment is protected from pollution.
Example 2
As shown in fig. 1, a certain stone coal vanadium extraction factory adopts a sodium salt roasting-water leaching method to extract vanadium from stone coal ores, and the obtained stone coal vanadium extraction tailings are shown in the following table:
63.28 mass percent of Fe 2O3 and 1.83 mass percent of V 2O5 in the stone coal vanadium extraction tailings, and the content of iron and vanadium elements is high. The stone coal vanadium extraction tailings, the dedusting ash and the adhesive are mixed uniformly according to a proportion, wherein the stone coal vanadium extraction tailings are 56wt%, the dedusting ash is 39wt% and the adhesive is 5%.
As shown in figure 1, the raw materials are pressed into pellets, and the pressed and formed cooled agglomerated pellets are dried to obtain a vanadium-containing coolant with the water content of 2 percent, wherein the vanadium-containing coolant contains 61.23 percent of TFe, 0.47 percent of V 2O5 and 5 to 40mm of granularity, and the vanadium-containing coolant has high iron and vanadium content, uniform granularity and good strength.
As shown in figure 1, molten iron obtained by smelting vanadium titano-magnetite by a blast furnace method, wherein the content of V in the molten iron is 0.30%, 121t vanadium-containing molten iron and 4.3t pig iron blocks are filled into a 120-ton vanadium extracting converter, 31Kg/t steel of the vanadium-containing coolant is added according to a cooling system during oxygen supply, the temperature rising speed of a molten pool is effectively controlled, the temperature of the molten pool is stably increased, the temperature of the molten pool at the vanadium extracting end point is controlled at 1389 ℃, qualified vanadium slag and semisteel are obtained, the grade of V 2O5 in the vanadium slag is 15.17%, the vanadium slag is improved by 0.23% compared with the furnace without the vanadium-containing coolant, and the metal yield of semisteel is improved by 0.3%.
As shown in fig. 1, the vanadium extraction steelmaking converter is provided with a dry dust remover in a matching way, and dust generated in the vanadium extraction steelmaking is captured and purified, and the obtained dry dust removal ash is recycled.
As shown in fig. 2, the required stone coal vanadium extraction tailings are transported to a workshop site through a dump truck, and after screening, the screened matters enter a tailings storage bin 1; the dedusting ash generated by the dry-method deduster 19 of the vanadium extraction converter steelmaking is sent to a dedusting ash storage bin 2 through a suction and discharge vehicle, the average TFe content of the dedusting ash is 57.26%, and the TFe and vanadium content in the raw materials are high; selecting a modified starch binder to be sent to a binder storage bin 3; the stone coal vanadium extraction tailings are conveyed to a raw material collection scraper machine 7 through a first batching metering belt 4 arranged in a tailings storage bin 1; the fly ash is conveyed to a raw material collection scraper machine 7 through a second batching metering belt 5 arranged in the fly ash storage bin 2; the modified starch adhesive is transported to a raw material collection scraper 7 by a third batching metering belt 6 provided in the adhesive storage bin 3.
As shown in fig. 2, the raw materials are fed into a mixing bin 8 after being mixed by a collecting scraper 7, are fed into an edge runner 10 by a star feeder 9, are uniformly mixed by the edge runner 10, and are quantitatively fed into a ball pressing machine 13 by a first conveying adhesive tape 11 to be pressed into balls. And conveying the pressed semi-finished product balls to a dryer 14 through a second conveying adhesive tape 12 for drying treatment, wherein the dryer adopts a pellet vertical dryer, a drying heat source adopts coke oven gas, the drying temperature is controlled to be about 300 ℃, and the water content of the dried finished product balls is less than or equal to 3 percent. The finally generated vanadium-containing coolant has uniform components, proper granularity and high strength, and can be added as a coolant when the vanadium extraction converter steelmaking, so that the heating speed of a molten pool can be effectively controlled, the vanadium oxidation rate is improved, the FeO content of the final slag is reduced, and the semisteel yield is improved.
As shown in fig. 2, the vanadium-containing cooling agent after ball pressing is filled into a converter high-level bin 16 through a bucket elevator 15, vanadium-containing molten iron obtained through a blast furnace method is filled into a vanadium extraction converter 18, the vanadium-containing cooling agent pressed into balls is added into the vanadium extraction converter 18 through a vibration feeding mechanism 17 in the vanadium extraction steelmaking process, the end temperature of vanadium extraction is controlled at 1386 ℃ of the selective oxidation temperature of C and V elements by adjusting the addition amount of the vanadium-containing cooling agent, vanadium slag is obtained, and flue gas generated in the vanadium extraction process is purified through a dry dust collector 19. The stone coal vanadium extraction tailings are pressed into balls and then added as a cooling agent of the vanadium extraction converter, so that the grade of vanadium in the vanadium slag and the metal yield of semisteel are improved, the iron and vanadium of the stone coal vanadium extraction tailings are recycled, the stone coal vanadium extraction tailings are treated harmlessly, and the environment is protected from pollution.
Example 3
As shown in fig. 1, a certain stone coal vanadium extraction factory adopts a calcium salt roasting-leaching method to extract vanadium from stone coal ores, and the obtained stone coal vanadium extraction tailings are shown in the following table:
35.67 mass percent of Fe 2O3 and 1.1 mass percent of V 2O5 in the stone coal vanadium extraction tailings, and the content of iron and vanadium elements is higher. The stone coal vanadium extraction tailings, the dedusting ash and the adhesive are mixed uniformly according to a proportion, wherein the stone coal vanadium extraction tailings are 64wt%, the dedusting ash is 31wt% and the adhesive is 5%.
The raw materials are pressed into pellets, and the pressed and formed cold bonded pellets are dried to obtain the vanadium-containing coolant with the water content of 2.5 percent, wherein the content of TFe in the vanadium-containing coolant is 33.94 percent, the content of V 2O5 is 0.33 percent, the granularity is 5-30 mm, the iron and vanadium content is high, the granularity is uniform, and the strength is good.
The molten iron obtained by smelting vanadium titano-magnetite by a blast furnace method, wherein the V content of the molten iron is 0.25%, 120t vanadium-containing molten iron and 4.9t pig iron blocks are filled into a 120t vanadium extracting converter, 26Kg/t steel of the vanadium-containing cooling agent is added according to a cooling system during oxygen supply, the temperature rising speed of a molten pool is effectively controlled, the temperature of the molten pool is enabled to rise steadily, the temperature of the molten pool at the vanadium extracting end point is controlled at 1392 ℃, qualified vanadium slag and semisteel are obtained, the V 2O5 grade in the vanadium slag is 15.21%, the vanadium slag is improved by 0.21% compared with the furnace without the vanadium-containing cooling agent, and the metal yield of semisteel is improved by 0.1%.
The vanadium extraction steelmaking converter is provided with a dry dust remover in a matching way, and dust generated in the vanadium extraction steelmaking is captured and purified, and the obtained dry dust is recycled.
The required stone coal vanadium extraction tailings are transported to a workshop site through a dump truck, and after sieving, the undersize materials enter a tailings storage bin 1; the dedusting ash generated by the dry-method deduster 19 of the vanadium extraction converter steelmaking is sent to a dedusting ash storage bin 2 through a suction and discharge vehicle, the average TFe content of the dedusting ash is 57.26%, and the TFe and vanadium content in the raw materials are high; selecting a modified starch binder to be sent to a binder storage bin 3; the stone coal vanadium extraction tailings are conveyed to a raw material collection scraper machine 7 through a first batching metering belt 4 arranged in a tailings storage bin 1; the fly ash is conveyed to a raw material collection scraper machine 7 through a second batching metering belt 5 arranged in the fly ash storage bin 2; the modified starch adhesive is transported to a raw material collection scraper 7 by a third batching metering belt 6 provided in the adhesive storage bin 3.
Raw materials enter a mixing bin 8 after being mixed by a collecting scraper 7, are fed into an edge runner 10 by a star feeder 9, are mixed uniformly by the edge runner 10, and are quantitatively fed into a ball pressing machine 13 by a first conveying adhesive tape 11 to be pressed into balls. And conveying the pressed semi-finished product balls to a dryer 14 through a second conveying adhesive tape 12 for drying treatment, wherein the dryer adopts a pellet vertical dryer, a drying heat source adopts coke oven gas, the drying temperature is controlled to be about 300 ℃, and the water content of the dried finished product balls is less than or equal to 3 percent. The finally generated vanadium-containing coolant has uniform components, proper granularity and high strength, and can be added as a coolant when the vanadium extraction converter steelmaking, so that the heating speed of a molten pool can be effectively controlled, the vanadium oxidation rate is improved, the FeO content of the final slag is reduced, and the semisteel yield is improved.
The vanadium-containing cooling agent after ball pressing is filled into a converter high-level bin 16 through a bucket elevator 15, vanadium-containing molten iron obtained through a blast furnace method is filled into a vanadium extraction converter 18, the vanadium-containing cooling agent pressed into balls is added into the vanadium extraction converter 18 through a vibration feeding mechanism 17 in the vanadium extraction steelmaking process, the end temperature of vanadium extraction is controlled at 1386 ℃ of the selective oxidation temperature of C and V elements by adjusting the addition amount of the vanadium-containing cooling agent, vanadium slag is obtained, and flue gas generated in the vanadium extraction process is purified through a dry dust remover 19. The stone coal vanadium extraction tailings are pressed into balls and then added as a cooling agent of the vanadium extraction converter, so that the grade of vanadium in the vanadium slag and the metal yield of semisteel are improved, the iron and vanadium of the stone coal vanadium extraction tailings are recycled, the stone coal vanadium extraction tailings are treated harmlessly, and the environment is protected from pollution.
Claims (7)
1. The harmless recycling method of the stone coal vanadium ore vanadium extraction tailings is characterized by comprising the following steps of:
Step one, raw material preparation: uniformly mixing stone coal vanadium ore vanadium extraction tailings and vanadium extraction converter dry dedusting ash with an adhesive according to a proportion to obtain a mixture; wherein, the vanadium extraction tailings of stone coal vanadium ore are 55 to 75 weight percent, the dedusting ash is 20 to 40 weight percent, and the binder is 5 percent;
Step two, mixing, ball pressing and drying: pressing the mixture obtained in the step one into pellets, and drying the pressed and formed cold bonded pellets to obtain a vanadium-containing coolant with the water content less than or equal to 3%;
step three, extracting vanadium from a converter: adding molten iron obtained by smelting vanadium titano-magnetite by a blast furnace method into a vanadium extraction converter for steelmaking, adding the vanadium-containing coolant according to a cooling system, keeping the temperature of a molten pool stably rising, and controlling the temperature of the molten pool at 1376-1386 ℃ at the vanadium extraction end point to obtain qualified vanadium slag and semisteel;
step four, recycling dry dedusting ash: the vanadium extraction steelmaking converter is provided with a dry dust remover in a matching way, and is used for capturing and purifying dust generated in the vanadium extraction steelmaking, and the obtained dry dust is recycled to the step one.
2. The harmless recycling method of stone coal vanadium ore vanadium extraction tailings, which is characterized in that the stone coal vanadium ore vanadium extraction tailings are tailings obtained after vanadium extraction by a sodium modification/calcification roasting-leaching method, and the mass percentages of the components are as follows: 35-65% of TFe; 1-2% of SiO 2 8～25%;V2O5; the balance of MgO, al 2O3、Cr2O3, mnO and other impurities.
3. The harmless recycling method of the stone coal vanadium ore vanadium extraction tailings, which is characterized in that the recycling method is realized by a harmless recycling system, and the harmless recycling system comprises a raw material unit, a mixed ball pressing unit and a converter vanadium extraction unit;
The raw material unit comprises a tailings storage bin (1), a dedusting ash storage bin (2) and an adhesive storage bin (3), wherein the bottom discharge ports of the tailings storage bin (1), the dedusting ash storage bin (2) and the adhesive storage bin (3) are respectively communicated with the feed inlet of the collecting scraper machine (7);
The mixing ball pressing unit comprises a mixing bin (8), a feeding hole of the mixing bin (8) is positioned below a discharging hole of the collecting scraper (7), the discharging hole of the mixing bin (8) is communicated with a feeding hole of an edge runner (10), the edge runner (10) is sequentially connected with a ball pressing machine (13) and a dryer (14), and a discharging hole of the dryer (14) is communicated with a feeding hole at the bottom of the bucket elevator (15);
The converter vanadium extraction unit comprises a converter bin (16) positioned below a top discharge hole of the bucket elevator (15), and a bottom discharge hole of the converter bin (16) is communicated with a feed inlet of the vanadium extraction converter (18).
4. The harmless recycling method for the tailings of vanadium extraction from stone coal vanadium ores according to claim 3 is characterized in that the bottom discharge ports of the tailings storage bin (1), the dedusting ash storage bin (2) and the adhesive storage bin (3) are respectively communicated with the feed inlet of the collecting scraper machine (7) through a first batching metering belt (4), a second batching metering belt (5) and a third batching metering belt (6).
5. The harmless recycling method of the stone coal vanadium extraction tailings is characterized in that a discharge hole of the mixing bin (8) is communicated with a feed hole of an edge runner (10) through a star feeder (9).
6. The harmless recycling method of the stone coal vanadium ore vanadium extraction tailings according to claim 3, wherein a discharge hole of the wheel mill (10) is connected with a ball pressing machine (13) through a first conveying adhesive tape (11), and the ball pressing machine (13) is connected with a dryer (14) through a second conveying adhesive tape (12).
7. The harmless recycling method of the stone coal vanadium ore vanadium extraction tailings is characterized in that the converter bin (16) is communicated with a feed inlet of a vanadium extraction converter (18) through a vibration feeding mechanism (17).
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