CN114672645B - Method for preparing ferrotitanium alloy from vanadium titano-magnetite tailings - Google Patents
Method for preparing ferrotitanium alloy from vanadium titano-magnetite tailings Download PDFInfo
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- CN114672645B CN114672645B CN202210329236.4A CN202210329236A CN114672645B CN 114672645 B CN114672645 B CN 114672645B CN 202210329236 A CN202210329236 A CN 202210329236A CN 114672645 B CN114672645 B CN 114672645B
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- magnetite
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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 57
- 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 50
- 238000000034 method Methods 0.000 title claims abstract description 38
- 229910001200 Ferrotitanium Inorganic materials 0.000 title claims abstract description 34
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 32
- 239000000956 alloy Substances 0.000 title claims abstract description 32
- 239000008188 pellet Substances 0.000 claims abstract description 35
- 239000011230 binding agent Substances 0.000 claims abstract description 21
- 238000001035 drying Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000003723 Smelting Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 238000005453 pelletization Methods 0.000 claims abstract description 12
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- 239000000571 coke Substances 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 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
- 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
- 239000006072 paste Substances 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
- 239000005720 sucrose Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 2
- 239000003610 charcoal Substances 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 27
- 229910052742 iron Inorganic materials 0.000 abstract description 14
- 238000011084 recovery Methods 0.000 abstract description 9
- 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
- 229910052804 chromium Inorganic materials 0.000 abstract description 3
- 239000011651 chromium Substances 0.000 abstract description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 2
- 238000009853 pyrometallurgy Methods 0.000 abstract description 2
- 239000000843 powder Substances 0.000 description 9
- 239000002245 particle Substances 0.000 description 7
- 238000005507 spraying Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010891 electric arc Methods 0.000 description 4
- 238000011049 filling Methods 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
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-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
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000004064 recycling Methods 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
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 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
- IXQWNVPHFNLUGD-UHFFFAOYSA-N iron titanium Chemical compound [Ti].[Fe] IXQWNVPHFNLUGD-UHFFFAOYSA-N 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
- 239000004408 titanium dioxide Substances 0.000 description 1
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 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
- 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 alloy by utilizing vanadium titano-magnetite tailings, and belongs to the technical field of pyrometallurgy. The method comprises the following steps: a. mixing vanadium titano-magnetite tailings, a binder and water in proportion, pelletizing, and drying to obtain dry pellets; b. and uniformly mixing the dry pellets and the reducing agent in proportion, and smelting to obtain the ferrotitanium alloy. The method has the advantages of simple process, low cost, short period, high added value of products and the like, can efficiently enrich valuable resources such as iron, titanium, vanadium, chromium and the like in 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 in 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 utilizing 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 amount of iron accounts for about 10% of the total storage amount of various kinds of iron ores nationally, the storage amount of titanium accounts for 86% of the total storage amount of various kinds of iron ores nationally, and the storage amount of vanadium accounts for about 48% of the total storage amount of various kinds of iron ores nationally. And each 500 ten thousand tons of iron ore concentrate is produced, and 750 ten thousand tons of vanadium titano-magnetite tailings are produced, wherein the tailings contain various valuable elements such as iron, titanium, scandium, sulfur, cobalt, nickel and the like, 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 to cause 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 free-flowing particles. The tailings contain a large amount of metal elements and nonmetal elements, and a few documents show that a hydrometallurgy method is adopted to separate part of valuable resources from the environment pollution and resource waste caused by the large-scale accumulation of vanadium titano-magnetite tailings, but the tailings are not industrialized, and the resource recovery rate is not high; in the prior art, valuable resources in the valuable resources are difficult to separate and recycle by adopting a beneficiation and extraction metallurgy method, and many elements cannot be recycled or the recycling cost is too high, so that the valuable resources are not effectively utilized for a long time, and the resources are lost and wasted. The technology for smelting vanadium titano-magnetite tailings to prepare ferrotitanium alloy and recovering valuable resources such as iron, titanium, vanadium and the like in the ferrotitanium alloy is not reported at present.
Disclosure of Invention
The invention aims to solve the technical problem that the recovery rate of valuable resources in the vanadium titano-magnetite tailings is low in the prior art.
The technical scheme adopted for solving the technical problems is as follows: the method for preparing the ferrotitanium alloy by utilizing 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. mixing the dry pellets and the reducing agent uniformly according to the mass ratio of 100:4-6, and smelting 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, sucrose, 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 1-5mm.
In the step a, the granularity of the vanadium titano-magnetite tailings is 100-325 meshes.
In the step a, the pelletizing mode is to add vanadium titano-magnetite tailings in proportion into a pelletizer, spray binder and water, and continuously add the vanadium titano-magnetite tailings, the binder and the water in proportion after forming the mother pellets until the mother pellets are as large as required in length, and take out the pellets.
Further, the pellet size is 8-15mm.
In the step a, the pelletizing rotating speed is 15-20r/min.
In the step a, the drying temperature is 100-150 ℃ and the drying time is 40-100min.
The beneficial effects of the invention are as follows: according to the method for preparing the ferrotitanium alloy by utilizing the vanadium titano-magnetite tailings, aiming at the characteristics of the vanadium titano-magnetite tailings, the mixing proportion of the pelletizing raw materials is specially designed, the pellet size is limited, and the obtained pellets are matched with the smelting process, so that the ferrotitanium alloy is finally prepared: 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 provided by the invention to smelt the vanadium titano-magnetite tailings into the ferrotitanium alloy, valuable resources in the vanadium titano-magnetite tailings can be effectively recovered, and the recovery rate is relatively high.
The method is suitable for the industries of pyrometallurgical vanadium making and the like, improves and 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 tailing piling and treatment process, has the advantages of simple process, low cost, short period, high added value of products 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 method for preparing ferrotitanium using vanadium titano-magnetite tailings according to 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 scheme of the invention can be implemented in the following way.
The specific process flow chart of the method for preparing ferrotitanium by utilizing vanadium titano-magnetite tailings is shown in fig. 1.
The method for preparing the ferrotitanium alloy by utilizing 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. mixing the dry pellets and the reducing agent uniformly according to the mass ratio of 100:4-6, and smelting 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, sucrose, starch and paste; the granularity of the vanadium titano-magnetite tailings is 100-325 meshes.
In the step a, a disc pelletizer is adopted for pelletizing, and the pelletizing speed is 15-20r/min. In the pelletizing process, adding proper vanadium titano-magnetite tailings into a disc pelletizer, and spraying proper binder and water; after the mother balls are formed, continuously adding mineral powder, water and binder until the length of the mother balls is as large as the required size; preferably, the pellet has a size of 8-15mm.
In the step a, the drying step is carried out in a forced air drying oven, the drying temperature is 100-150 ℃, and the drying time is 40-100min.
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 1-5mm.
Preferably, in the step b, the melting is performed in an arc furnace or a resistance furnace.
The technical scheme and effect of the present invention will be further described by practical examples.
Examples
The invention provides three groups of examples and 1 groups of comparative examples for preparing ferrotitanium alloy by adopting the method, and the grades of vanadium titano-magnetite tailings adopted in examples 1-3 and comparative example 1 are as follows: fe11.43%, tiO 2 4.157％，V 2 O 5 0.039％，Cr 2 O 3 0.004％。
Example 1
a. Grinding 10kg of vanadium titano-magnetite tailings, sieving with a 100-mesh sieve, and filling into a container for uniform mixing 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 granulator, and spraying 40g of binder and 150ml of water; after forming the mother balls, continuously adding tailing powder, water and a binder until the length of the mother balls is as large as the required size, taking out, and then repeating the steps until 10kg of vanadium titano-magnetite tailings are completely pelletized, so as to obtain wet pellets with the average size of 9 mm;
c. all the wet pellets are placed in a crucible and dried in a blast drying oven for 30min at a drying temperature of 100 ℃ to obtain 9.56kg dry pellets;
d. the dry pellets and coke particles (with the granularity of about 3 mm) are evenly mixed according to the mass ratio of 100:4, and then are smelted in an electric arc furnace, wherein the smelting temperature is 1600 ℃, and the smelting time is 20 minutes, so that 1.5kg of ferrotitanium alloy and 8.1kg of slag are obtained.
Example 2
a. Grinding 10kg of vanadium titano-magnetite tailings, sieving with a 100-mesh sieve, and filling into a container for uniform mixing 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 granulator, and spraying 22g of binder and 70ml of water; after forming the mother balls, continuously adding tailing powder, water and a binder until the length of the mother balls is as large as the required size, taking out, and then repeating the steps until 10kg of vanadium titano-magnetite tailings are completely pelletized to obtain wet pellets with the average size of 12 mm;
c. all the wet pellets are placed in a crucible and dried in a blast drying oven for 20min at a drying temperature of 120 ℃ to obtain 9.24kg dry pellets;
d. the dry pellets and coke particles (with the granularity of about 4 mm) are evenly mixed according to the mass ratio of 100:5, and then are smelted in an electric arc furnace, wherein the smelting temperature is 1700 ℃, and the smelting time is 15min, so as to obtain 1.3kg of ferrotitanium alloy and 8.18kg of slag.
Example 3
a. Grinding 10kg of vanadium titano-magnetite tailings, sieving with a 100-mesh sieve, and filling into a container for uniform mixing 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 granulator, and spraying 40g of binder and 150ml of water; after forming the mother balls, continuously adding tailing powder, water and a binder until the length of the mother balls is as large as the required size, taking out, and then repeating the steps until 10kg of vanadium titano-magnetite tailings are completely pelletized, so as to obtain wet pellets with the average size of 13 mm;
c. all the wet pellets are placed in a crucible and dried in a blast drying oven for 20min at a drying temperature of 120 ℃ to obtain 9.12kg dry pellets;
d. the dry pellets and coke particles (with the granularity of about 5 mm) are evenly mixed according to the mass ratio of 100:6, and then are smelted in an electric arc furnace, wherein the smelting temperature is 1650 ℃, and the smelting time is 20min, thus obtaining 1.45kg of ferrotitanium alloy and 7.82kg of slag.
Comparative example 1
a. Grinding 10kg of vanadium titano-magnetite tailings, sieving with a 100-mesh sieve, and filling into a container for uniform mixing 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 granulator, and spraying 15g of binder and 35ml of water; after forming the mother balls, continuously adding tailing powder, water and a binder until the length of the mother balls is as large as the required size, taking out, and then repeating the steps until 10kg of vanadium titano-magnetite tailings are completely pelletized, so as to obtain wet pellets with the size of 20 mm; the method comprises the steps of carrying out a first treatment on the surface of the
c. All the wet pellets are placed in a crucible and dried in a blast drying oven for 20min at 120 ℃ to obtain 8.08kg dry pellets;
d. the dry pellets and coke particles (with the granularity of about 5 mm) are evenly mixed according to the mass ratio of 100:3, and then are smelted in an electric arc furnace, wherein the smelting temperature is 1600 ℃, and the smelting time is 30min, thus obtaining 0.98kg of ferrotitanium alloy and 7.34kg of slag.
The grade of the ferrotitanium alloy obtained in examples 1 to 3 and comparative example 1 was tested, and the recovery rate was calculated, and the results are shown in Table 1.
TABLE 1 titanium-iron alloy test results
The XRD spectrum obtained by X-ray diffraction analysis of the ferrotitanium alloy prepared in example 3 is shown in FIG. 2.
As can be seen from FIG. 2, the alloy prepared by the present invention is a ferrotitanium alloy; as shown in 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 with higher recovery rate.
Claims (7)
1. The method for preparing the ferrotitanium alloy by utilizing the vanadium titano-magnetite tailings is characterized by comprising the following steps of:
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. uniformly mixing the dry pellets and a reducing agent according to the mass ratio of 100:4-6, and smelting at 1400-1600 ℃ for 15-50min to obtain ferrotitanium alloy;
in the step a, the pelletizing mode is to add vanadium titano-magnetite tailings in proportion into a pelletizer, spray binder and water, and continuously add the vanadium titano-magnetite tailings, the binder and the water in proportion after forming the mother pellets until the mother pellets are as large as required in length and then take out the pellets; the pellet size is 8-15mm.
2. The method for preparing ferrotitanium alloy by utilizing vanadium titano-magnetite tailings according to claim 1, wherein the method comprises the following steps: in the step a, the binder is at least one of polyvinyl alcohol, carboxymethyl cellulose, molasses, sucrose, starch and paste.
3. The method for preparing ferrotitanium alloy by utilizing vanadium titano-magnetite tailings according to claim 1, wherein the method comprises the following steps: in the step b, the reducing agent is at least one of coke, graphite, active carbon, charcoal and blue carbon.
4. The method for preparing ferrotitanium alloy by utilizing vanadium titano-magnetite tailings according to claim 1, wherein the method comprises the following steps: in the step a, the granularity of the vanadium titano-magnetite tailings is 100-325 meshes.
5. The method for preparing ferrotitanium alloy from vanadium titano-magnetite tailings according to claim 3, wherein: the granularity of the reducing agent is 1-5mm.
6. The method for preparing ferrotitanium alloy by utilizing vanadium titano-magnetite tailings according to claim 1, wherein the method comprises the following steps: in the step a, the pelletizing rotating speed is 15-20r/min.
7. The method for preparing ferrotitanium alloy by utilizing vanadium titano-magnetite tailings according to claim 1, wherein the method comprises the following steps: in the step a, the drying temperature is 100-150 ℃ and the drying time is 40-100min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210329236.4A CN114672645B (en) | 2022-03-30 | 2022-03-30 | Method for preparing ferrotitanium alloy from vanadium titano-magnetite tailings |
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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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