CN114672645A - Method for preparing ferrotitanium by using vanadium titano-magnetite tailings - Google Patents
Method for preparing ferrotitanium by using vanadium titano-magnetite tailings Download PDFInfo
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- CN114672645A CN114672645A CN202210329236.4A CN202210329236A CN114672645A CN 114672645 A CN114672645 A CN 114672645A CN 202210329236 A CN202210329236 A CN 202210329236A CN 114672645 A CN114672645 A CN 114672645A
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- vanadium titano
- magnetite tailings
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- ferrotitanium
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- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 59
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 58
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 229910001200 Ferrotitanium Inorganic materials 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000008188 pellet Substances 0.000 claims abstract description 31
- 239000011230 binding agent Substances 0.000 claims abstract description 21
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 19
- 239000000956 alloy Substances 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 16
- 238000005453 pelletization Methods 0.000 claims abstract description 12
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 11
- 239000000571 coke Substances 0.000 claims description 7
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 3
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims description 3
- 229930006000 Sucrose Natural products 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 235000013379 molasses Nutrition 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 235000019422 polyvinyl alcohol Nutrition 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 229960004793 sucrose Drugs 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 23
- 238000003723 Smelting Methods 0.000 abstract description 12
- 229910052742 iron Inorganic materials 0.000 abstract description 12
- 238000011084 recovery Methods 0.000 abstract description 10
- 229910052719 titanium Inorganic materials 0.000 abstract description 9
- 239000010936 titanium Substances 0.000 abstract description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052804 chromium Inorganic materials 0.000 abstract description 2
- 239000011651 chromium Substances 0.000 abstract description 2
- 238000009853 pyrometallurgy Methods 0.000 abstract description 2
- 239000000843 powder Substances 0.000 description 9
- 238000007605 air drying Methods 0.000 description 5
- 238000010891 electric arc Methods 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 238000007873 sieving Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052706 scandium Inorganic materials 0.000 description 2
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000628 Ferrovanadium Inorganic materials 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- QDOXWKRWXJOMAK-UHFFFAOYSA-N chromium(III) oxide Inorganic materials O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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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
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/006—Starting from ores containing non ferrous metallic oxides
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/12—Making spongy iron or liquid steel, by direct processes in electric furnaces
-
- 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
- C22B34/00—Obtaining refractory metals
- C22B34/10—Obtaining titanium, zirconium or hafnium
- C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
- C22B34/1263—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining metallic titanium from titanium compounds, e.g. by reduction
- C22B34/1281—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining metallic titanium from titanium compounds, e.g. by reduction using carbon containing agents, e.g. C, CO, carbides
-
- 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
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
Abstract
The invention discloses a method for preparing ferrotitanium by using vanadium titano-magnetite tailings, belonging to the technical field of pyrometallurgy. The method comprises the following steps: a. mixing the vanadium titano-magnetite tailings, a binder and water in proportion for pelletizing, and drying to obtain dry pellets; b. and uniformly mixing the dry pellets and a reducing agent in proportion, and then smelting to obtain the ferrotitanium alloy. The method has the advantages of simple process, low cost, short period, high product added value and the like, can efficiently enrich valuable resources such as iron, titanium, vanadium, chromium and the like from the vanadium titano-magnetite tailings, has higher economic benefit, and can effectively solve the problem of lower recovery rate of the valuable resources in the vanadium titano-magnetite tailings recovered by the prior art.
Description
Technical Field
The invention belongs to the technical field of pyrometallurgy, and particularly relates to a method for preparing ferrotitanium by using vanadium titano-magnetite tailings.
Background
The reserves of vanadium titano-magnetite in China reach more than 100 hundred million tons, and the ore mainly contains three valuable elements of Fe, V and Ti. Wherein the storage capacity of iron accounts for about 10 percent of the total storage capacity of various iron ores in China, the storage capacity of titanium accounts for 86 percent of the whole China, and the storage capacity of vanadium accounts for about 48 percent of the whole China. And when 500 ten thousand tons of iron ore concentrate is produced, 750 ten thousand tons of vanadium titano-magnetite tailings are produced at the same time, wherein the tailings contain various valuable elements such as iron, titanium, scandium, sulfur, cobalt, nickel and the like, wherein the iron content is 13-15%, the titanium dioxide content is 8-10%, the vanadium pentoxide is about 0.1%, the scandium content is 0.0039-0.0042%, the sulfur content is 0.4-0.69%, the cobalt content is 0.01-0.017%, and the nickel content is 0.0011-0.0042%.
The accumulation of a large amount of tailings not only occupies a lot of precious land resources and causes serious ecological damage and environmental pollution, but also has serious potential safety hazard, and the tailings are easy to cause landslide and collapse due to the characteristics of fine, loose and easy flowing of the tailings. The tailings contain a large amount of metal elements and non-metal elements, and aiming at the phenomena of environmental pollution and resource waste caused by the large accumulation of the vanadium titano-magnetite tailings, a few documents show that a part of valuable resources are separated by adopting a hydrometallurgy method, but the method is not industrialized, and the resource recovery rate is not high; in the prior art, valuable resources in the ore dressing and extraction metallurgy method are difficult to separate and recover, and many elements cannot be recovered or the recovery cost is too high, so that the valuable resources are not effectively utilized for a long time, and the loss and waste of the resources are caused. The technology for preparing ferrotitanium by smelting vanadium titano-magnetite tailings and recovering valuable resources such as iron, titanium, vanadium and the like in the ferrotitanium is not reported at present.
Disclosure of Invention
The invention aims to solve the technical problem of low recovery rate of valuable resources in the vanadium titano-magnetite tailings in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: the method for preparing the ferrotitanium by using the vanadium titano-magnetite tailings comprises the following steps:
a. mixing vanadium titano-magnetite tailings, a binder and water according to the mass ratio of 100: 2-3: 4-9, pelletizing, and drying to obtain dry pellets;
b. the dry pellets and the reducing agent are mixed evenly according to the mass ratio of 100: 4-6, and then smelted for 15-50min at 1400-1600 ℃ to obtain the ferrotitanium alloy.
In the step a, the binder is at least one of polyvinyl alcohol, carboxymethyl cellulose, molasses, cane sugar, starch and paste.
In the step b, the reducing agent is at least one of coke, graphite, activated carbon, charcoal and blue carbon.
Further, the particle size of the reducing agent is 1-5 mm.
In the step a, the particle size of the vanadium titano-magnetite tailings is 100-325 meshes.
In the step a, the pelletizing mode is that the vanadium titano-magnetite tailings are added into a pelletizer according to a proportion, the binder and the water are sprayed, after a mother ball is formed, the vanadium titano-magnetite tailings, the binder and the water are continuously added according to the proportion until the mother ball grows to the required size, and then the pellet is taken out.
Further, the size of the pellets is 8-15 mm.
In the step a, the pelletizing rotating speed is 15-20 r/min.
In the step a, the drying temperature is 100-.
The invention has the beneficial effects that: the method for preparing the ferrotitanium by using the vanadium titano-magnetite tailings is characterized in that the mixing proportion of pelletizing raw materials is specially designed and the size of pellets is limited according to the characteristics of the vanadium titano-magnetite tailings, and the obtained pellets are matched with the smelting process of the invention to finally prepare the ferrotitanium, wherein: the grade of iron is 74-81.3%, the grade of titanium is 23.4-26.5%, and the grade of vanadium is 0.20-0.23%; the recovery rate of iron is 96-97%, the recovery rate of titanium is 84.5-86.9%, and the recovery rate of vanadium is 78.4-79.5%. By adopting the method of the invention to smelt the vanadium titano-magnetite tailings into ferrotitanium, valuable resources in the vanadium titano-magnetite tailings can be effectively recovered, and the recovery rate is high.
The method is suitable for the industries of pyrometallurgical ferrovanadium smelting and the like, overcomes the defects of serious environmental pollution, low resource utilization rate, long process flow, low economic benefit and the like in the existing vanadium titano-magnetite tailings stacking and processing process, has the advantages of simple process, low cost, short period, high product added value and the like, can efficiently enrich valuable resources such as iron, titanium, vanadium, chromium and the like from the vanadium titano-magnetite tailings, and has higher economic benefit.
Drawings
FIG. 1 is a process flow diagram of a process for preparing ferrotitanium from vanadium titano-magnetite tailings in accordance with the present invention;
FIG. 2 is an XRD spectrum of a ferrotitanium alloy prepared in example 3 of the present invention.
Detailed Description
The technical solution of the present invention can be specifically implemented as follows.
The specific process flow chart of the method for preparing the ferrotitanium by using the vanadium titano-magnetite tailings is shown in figure 1.
The method for preparing the ferrotitanium by using the vanadium titano-magnetite tailings comprises the following steps:
a. mixing vanadium titano-magnetite tailings, a binder and water according to the mass ratio of 100: 2-3: 4-9, pelletizing, and drying to obtain dry pellets;
b. the dry pellets and the reducing agent are mixed evenly according to the mass ratio of 100: 4-6, and then smelted for 15-50min at 1400-1600 ℃ to obtain the ferrotitanium alloy.
In the step a, the binder is at least one of polyvinyl alcohol, carboxymethyl cellulose, molasses, cane sugar, starch and paste; the particle size of the vanadium titano-magnetite tailings is 100-325 meshes.
And c, pelletizing by using a disc pelletizer in the step a, wherein the pelletizing rotating speed is 15-20 r/min. In the pelletizing process, adding proper vanadium titano-magnetite tailings into a disc pelletizer, and spraying proper binder and water; after the mother ball is formed, continuously adding mineral powder, water and a binder until the mother ball grows to the required size; preferably, the size of the pellets is 8-15 mm.
In the step a, the drying step is carried out in a forced air drying box, the drying temperature is 100-150 ℃, and the drying time is 40-100 min.
In the step b, the reducing agent is at least one of coke, graphite, activated carbon, charcoal and blue carbon; preferably, the particle size of the reducing agent is 1 to 5 mm.
Preferably, in the step b, the melting is performed in an electric arc furnace or an electric resistance furnace.
The technical solution and effects of the present invention will be further described below by way of practical examples.
Examples
The invention provides three groups of examples and 1 group pair proportion for preparing ferrotitanium by adopting the method of the invention, and the grade of the vanadium titano-magnetite tailings adopted in the examples 1-3 and the comparative example 1 is as follows: fe11.43%, TiO24.157％，V2O50.039％，Cr2O30.004％。
Example 1
a. Finely grinding 10kg of vanadium titano-magnetite tailings, sieving with a 100-mesh sieve, and then putting into a container to be uniformly mixed for later use;
b. starting a disc pelletizer, adjusting the rotating speed to 15r/min, and setting the inclination angle to be 50 degrees; then adding 2kg of tailing powder into a disc pelletizer, and spraying 40g of binder and 150ml of water; after the mother ball is formed, continuously adding the tailing powder, water and the binder until the mother ball grows to the required size, taking out, and then repeating the step until 10kg of vanadium titano-magnetite tailings are all pelletized to obtain wet pellets with the average size of 9 mm;
c. putting all prepared wet pellets into a crucible, and drying in a forced air drying oven for 30min at 100 ℃ to obtain 9.56kg of dry pellets;
d. the dry pellets and coke particles (the granularity is about 3mm) are evenly mixed according to the mass ratio of 100: 4 and then are smelted in an electric arc furnace, the smelting temperature is 1600 ℃, the smelting time is 20min, and 1.5kg of ferrotitanium alloy and 8.1kg of slag are obtained.
Example 2
a. Finely grinding 10kg of vanadium titano-magnetite tailings, sieving with a 100-mesh sieve, and then putting into a container to be uniformly mixed for later use;
b. starting a disc pelletizer, adjusting the rotating speed to 18r/min, and setting the inclination angle to be 50 degrees; then adding 1kg of tailing powder into a disc pelletizer, and spraying 22g of a binder and 70ml of water; after the mother ball is formed, continuously adding the tailing powder, water and the binder until the mother ball grows to the required size, taking out, and then repeating the step until 10kg of vanadium titano-magnetite tailings are all pelletized to obtain wet pellets with the average size of 12 mm;
c. putting all prepared wet pellets into a crucible, and drying in a forced air drying oven for 20min at the drying temperature of 120 ℃ to obtain 9.24kg of dry pellets;
d. the dry pellets and coke particles (the granularity is about 4mm) are evenly mixed according to the mass ratio of 100: 5 and then are smelted in an electric arc furnace, the smelting temperature is 1700 ℃, the smelting time is 15min, and 1.3kg of ferrotitanium alloy and 8.18kg of slag are obtained.
Example 3
a. Finely grinding 10kg of vanadium titano-magnetite tailings, sieving with a 100-mesh sieve, and then putting into a container to be uniformly mixed for later use;
b. starting a disc pelletizer, adjusting the rotating speed to 20r/min, and setting the inclination angle to be 60 degrees; then adding 2kg of tailing powder into a disc pelletizer, and spraying 40g of binder and 150ml of water; after the mother ball is formed, continuously adding the tailing powder, water and the binder until the mother ball grows to the required size, taking out, and then repeating the step until 10kg of vanadium titano-magnetite tailings are all pelletized to obtain wet pellets with the average size of 13 mm;
c. putting all prepared wet pellets into a crucible, and drying in a forced air drying oven for 20min at the drying temperature of 120 ℃ to obtain 9.12kg of dry pellets;
d. the dry pellets and coke particles (the particle size is about 5mm) are evenly mixed according to the mass ratio of 100: 6 and then are smelted in an electric arc furnace, the smelting temperature is 1650 ℃, the smelting time is 20min, and 1.45kg of ferrotitanium and 7.82kg of slag are obtained.
Comparative example 1
a. Finely grinding 10kg of vanadium titano-magnetite tailings, sieving with a 100-mesh sieve, and then putting into a container to be uniformly mixed for later use;
b. starting a disc pelletizer, adjusting the rotating speed to 12r/min, and setting the inclination angle to be 60 degrees; then adding 1kg of tailing powder into a disc pelletizer, and spraying 15g of binder and 35ml of water; after the mother ball is formed, continuously adding the tailing powder, water and the binder until the mother ball grows to the required size, taking out, and then repeating the step until 10kg of vanadium titano-magnetite tailings are completely pelletized to obtain wet pellets with the size of 20 mm; (ii) a
c. Putting all prepared wet pellets into a crucible, and drying in a forced air drying oven for 20min at the drying temperature of 120 ℃ to obtain 8.08kg of dry pellets;
d. the dry pellets and coke particles (the granularity is about 5mm) are evenly mixed according to the mass ratio of 100: 3 and then are smelted in an electric arc furnace, the smelting temperature is 1600 ℃, the smelting time is 30min, and 0.98kg of ferrotitanium and 7.34kg of slag are obtained.
The grades of the ferrotitanium alloys obtained in examples 1 to 3 and comparative example 1 were tested and the recovery rates were calculated, and the results are shown in table 1.
TABLE 1 ferrotitanium test results
The ferrotitanium alloy prepared in example 3 was subjected to X-ray diffraction analysis, and the XRD spectrum obtained is shown in fig. 2.
As can be seen from FIG. 2, the alloy prepared by the invention is ferrotitanium; as can be seen from Table 1, the method of the invention can be used for recycling iron, titanium, vanadium and the like in the vanadium-titanium magnetite tailings to prepare high-quality ferrotitanium alloy products, and has high recovery rate.
Claims (9)
1. The method for preparing the ferrotitanium by using the vanadium titano-magnetite tailings is characterized by comprising the following steps:
a. mixing vanadium titano-magnetite tailings, a binder and water according to the mass ratio of 100: 2-3: 4-9, pelletizing, and drying to obtain dry pellets;
b. the dry pellets and the reducing agent are mixed evenly according to the mass ratio of 100: 4-6, and then smelted for 15-50min at 1400-1600 ℃ to obtain the ferrotitanium alloy.
2. The method for preparing the ferrotitanium alloy by using the vanadium titano-magnetite tailings, according to claim 1, is characterized in that: in the step a, the binder is at least one of polyvinyl alcohol, carboxymethyl cellulose, molasses, cane sugar, starch and paste.
3. The method for preparing the ferrotitanium alloy by using the vanadium titano-magnetite tailings, according to claim 1, is characterized in that: in the step b, the reducing agent is at least one of coke, graphite, activated carbon, charcoal and blue carbon.
4. The method for preparing the ferrotitanium alloy by using the vanadium titano-magnetite tailings as claimed in claim 1, wherein: in the step a, the particle size of the vanadium titano-magnetite tailings is 100-325 meshes.
5. The method for preparing the ferrotitanium alloy by using the vanadium titano-magnetite tailings, according to claim 3, is characterized in that: the particle size of the reducing agent is 1-5 mm.
6. The method for preparing the ferrotitanium alloy by using the vanadium titano-magnetite tailings, according to claim 1, is characterized in that: in the step a, the pelletizing mode is that vanadium titano-magnetite tailings are added into a pelletizer according to a proportion, a binder and water are sprayed, after a mother ball is formed, the vanadium titano-magnetite tailings, the binder and the water are continuously added according to the proportion until the mother ball grows to a required size, and then the pellets are taken out.
7. The method for preparing the ferrotitanium alloy by using the vanadium titano-magnetite tailings, according to claim 6, is characterized in that: the size of the pellets is 8-15 mm.
8. The method for preparing the ferrotitanium alloy by using the vanadium titano-magnetite tailings, according to claim 1, is characterized in that: in the step a, the pelletizing rotating speed is 15-20 r/min.
9. The method for preparing the ferrotitanium alloy by using the vanadium titano-magnetite tailings as claimed in claim 1, wherein: in the step a, the drying temperature is 100-.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210329236.4A CN114672645B (en) | 2022-03-30 | 2022-03-30 | Method for preparing ferrotitanium alloy from vanadium titano-magnetite tailings |
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