CN103526011B - Tailings in vanadium extraction carbonaceous pelletizing and preparation method thereof - Google Patents
Tailings in vanadium extraction carbonaceous pelletizing and preparation method thereof Download PDFInfo
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- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 83
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 238000000605 extraction Methods 0.000 title claims abstract description 72
- 238000005453 pelletization Methods 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 25
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 25
- 239000002817 coal dust Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 28
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 claims description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 20
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims description 20
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- 229910052799 carbon Inorganic materials 0.000 claims description 14
- 229910052742 iron Inorganic materials 0.000 claims description 14
- 239000007864 aqueous solution Substances 0.000 claims description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 239000000377 silicon dioxide Substances 0.000 claims description 10
- 229960001866 silicon dioxide Drugs 0.000 claims description 10
- 235000012239 silicon dioxide Nutrition 0.000 claims description 10
- 239000012467 final product Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 239000002910 solid waste Substances 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 22
- 238000007906 compression Methods 0.000 description 22
- 238000000034 method Methods 0.000 description 10
- 239000008188 pellet Substances 0.000 description 9
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 5
- 229910052733 gallium Inorganic materials 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- -1 wherein Substances 0.000 description 2
- 241000628997 Flos Species 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 1
- RQLWXPCFUSHLNV-UHFFFAOYSA-N [Cr].[Ca] Chemical compound [Cr].[Ca] RQLWXPCFUSHLNV-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000007885 magnetic separation 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
- 239000002184 metal Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000001698 pyrogenic effect Effects 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to tailings in vanadium extraction carbonaceous pelletizing and preparation method thereof, belong to field of metallurgy.The technical problem to be solved in the present invention is, tailings in vanadium extraction carbonaceous pelletizing providing a kind of high strength and preparation method thereof.Tailings in vanadium extraction carbonaceous pelletizing of the present invention, is made up of following parts by weight of component: tailings in vanadium extraction 100 parts, wilkinite 0.6 ~ 0.9 part, polyvinyl alcohol 0.3 ~ 0.5 part, coal dust 12 ~ 18 parts, 8 ~ 12 parts, water.Further, the invention also discloses the preparation method of tailings in vanadium extraction carbonaceous pelletizing.Tailings in vanadium extraction carbonaceous pelletizing intensity of the present invention is high, Well-recovered, simultaneously, step of preparation process of the present invention is simple, and required equipment is few, can meet the requirement of suitability for industrialized production, for Using Metallurgical Solid Wastes comprehensive utilization is laid a good foundation, avoid the wasting of resources and environmental pollution, have broad application prospects.
Description
Technical field
The present invention relates to tailings in vanadium extraction carbonaceous pelletizing and preparation method thereof, belong to field of metallurgy.
Background technology
Flos Bombacis Malabarici-Xichang Region, Sichuan Province of China is richly stored with v-ti magnetite ore resources, and Panxi Diqu vanadium titano-magnetite a kind ofly has the large-scale compositeon-silicon paragenetic of the multiple elements such as chromium, gallium, nickel, cobalt, scandium, platinum family with iron, vanadium, titanium for main and association.In vanadium titano-magnetite, gallium, vanadium, the chromium ratio entered after dressing and smelting process in vanadium slag is respectively 3.8%, 39.85%, 26.02%, grade is respectively 0.014%, 13.28%, 0.38%, Leaching of Vanadium from Vanadium slag technique is only extracted most vanadium resource, and gallium, chromium and small part vanadium resource enter and be enriched in tailings in vanadium extraction, piled up by as metallurgical waste slag.
At present, the whole nation is annual produces nearly 400,000 tons of the tailings in vanadium extraction produced in Vanadium Pentoxide in FLAKES process, domestic and international scientific worker mainly takes wet processing to extract residual vanadium in tailings in vanadium extraction, prepare far ultrared paint and vanadium-titanium black ceramic, direct-reduction-magnetic separation process reclaims iron wherein and pyrogenic process and wet processing reclaim gallium, iron, systematic study is not carried out, synthetical recovery gallium wherein, vanadium, chromium, iron to tailings in vanadium extraction comprehensive utilization.Therefore, how research develops and utilizes it, and synthetical recovery valuable metal is wherein not only significant to comprehensive utilization of resources, and can solve tailings in vanadium extraction and pile up brought series of environmental problems throughout the year.The preparation of tailings in vanadium extraction carbon-burdened pellet and the tailings in vanadium extraction pyrometallurgical smelting that rises to of intensity are laid a good foundation, and make tailings in vanadium extraction adopt pyrometallurgical smelting process to become possibility.
Chinese patent 201210426342.0 discloses a kind of blast furnace carbonaceous pelletizing, its component is by following mass parts composition: sintering machine head end electro-precipitating dust 11-13 part, blast furnace gas mud 39-42 part, ore deposit, stokehold groove dedusting ash 20-22 part, without calcium chromium slag 17-19 part, titanium vanadium magnetite concentrate 10-12 part, zirconium white 3-5 part, wilkinite 1-2 part, slaked lime 1 part.Although the carbonaceous pelletizing of this application is raw material utilizing the dust-like waste of Steel Plant, its ultimate compression strength is only up to 97.66N/, and ultimate compression strength is not satisfactory.
Summary of the invention
The technical problem to be solved in the present invention is, tailings in vanadium extraction carbonaceous pelletizing providing a kind of high strength and preparation method thereof.
Tailings in vanadium extraction carbonaceous pelletizing of the present invention, is made up of following parts by weight of component: tailings in vanadium extraction 100 parts, wilkinite 0.6 ~ 0.9 part, polyvinyl alcohol 0.3 ~ 0.5 part, coal dust 12 ~ 18 parts, 8 ~ 12 parts, water.
Wherein, in order to improve resistance to compression and the dropping strength of tailings in vanadium extraction carbonaceous pelletizing, in described tailings in vanadium extraction, iron level is preferably 26 ~ 32wt%, be more preferably 32wt%, the content of Vanadium Pentoxide in FLAKES is preferably 1.5 ~ 2.5wt%, is more preferably 2wt%, the content of chromium sesquioxide is 1.5 ~ 3.0wt%, be more preferably 2.2wt%, manganese oxide, silicon-dioxide and aluminium sesquioxide content sum are 23 ~ 30wt%, are more preferably 25wt%; The fixed carbon content of described coal dust preferably>=70wt%, be more preferably 75 ~ 85wt%, most preferably be 79.33wt%; Ash content and volatile content sum preferably≤30%, are more preferably 15 ~ 25wt%, most preferably are 19.98wt%, calorific value preferably>=25000KJ Kg
-1, be more preferably 27000 ~ 30000KJ Kg
-1, most preferably be 2851110KJ Kg
-1.
Further, in order to improve resistance to compression and the dropping strength of tailings in vanadium extraction carbonaceous pelletizing, described polyvinyl alcohol is preferably the aqueous solution that concentration is 3 ~ 10wt%, be more preferably the 6wt% aqueous solution, wherein, polyvinyl alcohol can select conventional polyvinyl alcohol, and preferred molecular-weight average is the polyvinyl alcohol of 180000 ~ 200000; As more preferably scheme, the preparation of polyvinyl alcohol is adopted with the following method: polyvinyl alcohol is water-soluble at 100 ~ 150 DEG C, is prepared into polyvinyl alcohol water solution.
Further, the invention also discloses the preparation method of tailings in vanadium extraction carbonaceous pelletizing, comprise the steps:
A, mixing of materials: take each component according to proportioning, and mix;
B, pressure forming: under the forming pressure of 10 ~ 14MPa, be pressed into green-ball;
C, roasting: by green-ball roasting 10 ~ 20min at 650 ~ 900 DEG C, to obtain final product.
Further, become to produce cost to reduce tailings in vanadium extraction carbonaceous pelletizing, step c is preferable in air carries out.
After tested, the compression strength of green pellet prepared by the inventive method is 30 ~ 60 Ns/ball, and dropping strength is 10 ~ 15 times/ball; The tailings in vanadium extraction carbonaceous pelletizing ultimate compression strength finally obtained is 100 ~ 500 Ns/ball, and dropping strength is 30 ~ 50 times/ball.
Wherein, intensity test of the present invention adopts intelligent strength tester, and dropping strength is measured and taken precautions against as distance rubber plate 50cm.
Beneficial effect of the present invention:
1, gained tailings in vanadium extraction carbonaceous pelletizing intensity of the present invention is high, Well-recovered, can as the raw material of the high temperature melting furnaces such as rotary hearth furnace, electric arc furnace, car bottom furnace, and solid raw material basis is laid in the comprehensive utilization for tailings in vanadium extraction.
2, step of preparation process of the present invention is simple, and required equipment is few, can meet the requirement of suitability for industrialized production, simultaneously for Using Metallurgical Solid Wastes comprehensive utilization is laid a good foundation, avoids the wasting of resources and environmental pollution, has broad application prospects.
Accompanying drawing explanation
Fig. 1 production scheme.
Embodiment
Tailings in vanadium extraction carbonaceous pelletizing of the present invention, is made up of following parts by weight of component: tailings in vanadium extraction 100 parts, wilkinite 0.6 ~ 0.9 part, polyvinyl alcohol 0.3 ~ 0.5 part, coal dust 12 ~ 18 parts, 8 ~ 12 parts, water.
Wherein, in order to improve resistance to compression and the dropping strength of tailings in vanadium extraction carbonaceous pelletizing, in described tailings in vanadium extraction, iron level is preferably 26 ~ 32wt%, be more preferably 32wt%, the content of Vanadium Pentoxide in FLAKES is preferably 1.5 ~ 2.5wt%, is more preferably 2wt%, the content of chromium sesquioxide is 1.5 ~ 3.0wt%, be more preferably 2.2wt%, manganese oxide, silicon-dioxide and aluminium sesquioxide content sum are 23 ~ 30wt%, are more preferably 25wt%; The fixed carbon content of described coal dust preferably>=70wt%, be more preferably 75 ~ 85wt%, most preferably be 79.33wt%; Ash content and volatile content sum preferably≤30%, are more preferably 15 ~ 25wt%, most preferably are 19.98wt%, calorific value preferably>=25000KJ Kg
-1, be more preferably 27000 ~ 30000KJ Kg
-1, most preferably be 2851110KJ Kg
-1.
Further, in order to improve resistance to compression and the dropping strength of tailings in vanadium extraction carbonaceous pelletizing, described polyvinyl alcohol is preferably the aqueous solution that concentration is 3 ~ 10wt%, be more preferably the 6wt% aqueous solution, wherein, polyvinyl alcohol can select conventional polyvinyl alcohol, and preferred molecular-weight average is the polyvinyl alcohol of 180000 ~ 200000; As more preferably scheme, the preparation of polyvinyl alcohol is adopted with the following method: polyvinyl alcohol is water-soluble at 100 ~ 150 DEG C, is prepared into polyvinyl alcohol water solution.
Further, the invention also discloses the preparation method of tailings in vanadium extraction carbonaceous pelletizing, comprise the steps:
A, mixing of materials: take each component according to proportioning, and mix;
B, pressure forming: under the forming pressure of 10 ~ 14MPa, be pressed into green-ball;
C, roasting: by green-ball roasting 10 ~ 20min at 650 ~ 900 DEG C, to obtain final product.
Further, become to produce cost to reduce tailings in vanadium extraction carbonaceous pelletizing, step c is preferable in air carries out.
After tested, the compression strength of green pellet prepared by the inventive method is 30 ~ 60 Ns/ball, and dropping strength is 10 ~ 15 times/ball; The tailings in vanadium extraction carbonaceous pelletizing ultimate compression strength finally obtained is 100 ~ 500 Ns/ball, and dropping strength is 30 ~ 50 times/ball.
Wherein, intensity test of the present invention adopts intelligent strength tester, and dropping strength is measured and taken precautions against as distance rubber plate 50cm.
Below in conjunction with embodiment, the specific embodiment of the present invention is further described, does not therefore limit the present invention among described scope of embodiments.
The preparation of embodiment 1 tailings in vanadium extraction carbonaceous pelletizing of the present invention
A, mixing of materials: by Ti Fan Wei Zha ﹕ Peng Run Tu ﹕ Ju Yi Xi Chun ﹕ Mei Fen ﹕ moisture by weight 100 ﹕ 0.9 ﹕ 0.4 ﹕ 16 ﹕ 8 Homogeneous phase mixing;
Wherein, in tailings in vanadium extraction, iron level is 32wt%, and the content of Vanadium Pentoxide in FLAKES is 2wt%, and the content of chromium sesquioxide is 2.2wt%, and manganese oxide, silicon-dioxide and aluminium sesquioxide content sum are 25wt%; The fixed carbon content of coal dust is 79.33%, and ash content and volatile content sum are 19.98%, and calorific value is 28511KJ Kg
-1; Molecular weight is 180000, and concentration is the aqueous solution of 6wt%;
B, pressure forming: be pressed into green-ball at forming pressure 11MPa;
C, roasting: by green-ball roasting 15min at 800 DEG C, to obtain final product.
After tested, compression strength of green pellet is 35 Ns/ball, and dropping strength is 10 times/ball; After roasting, tailings in vanadium extraction carbonaceous pelletizing ultimate compression strength is 150 Ns/ball, and dropping strength is 35 times/ball.
The preparation of embodiment 2 tailings in vanadium extraction carbonaceous pelletizing of the present invention
A, mixing of materials: by Ti Fan Wei Zha ﹕ Peng Run Tu ﹕ Ju Yi Xi Chun ﹕ Mei Fen ﹕ moisture by weight 100 ﹕ 0.9 ﹕ 0.4 ﹕ 16 ﹕ 8 Homogeneous phase mixing;
Wherein, in tailings in vanadium extraction, iron level is 30.2wt%, and the content of Vanadium Pentoxide in FLAKES is 1.5wt%, and the content of chromium sesquioxide is 1.6wt%, and manganese oxide, silicon-dioxide and aluminium sesquioxide content sum are 23.1wt%; The fixed carbon content of coal dust is 89.1%, and ash content and volatile content sum are 11.2%, and calorific value is 27301KJ Kg
-1; Polyvinyl alcohol molecule amount is 200000, and concentration is the aqueous solution of 3wt%;
B, pressure forming: be pressed into green-ball at forming pressure 14MPa;
C, roasting: by green-ball roasting 15min at 900 DEG C, to obtain final product.
After tested, green pellets ultimate compression strength is 35 Ns/ball, and dropping strength is 10 times/ball; After roasting, tailings in vanadium extraction carbonaceous pelletizing ultimate compression strength is 500 Ns/ball, and dropping strength is 45 times/ball.
The preparation of embodiment 3 tailings in vanadium extraction carbonaceous pelletizing of the present invention
A, mixing of materials: by Ti Fan Wei Zha ﹕ Peng Run Tu ﹕ Ju Yi Xi Chun ﹕ Mei Fen ﹕ moisture by weight 100 ﹕ 0.7 ﹕ 0.3 ﹕ 12 ﹕ 10 Homogeneous phase mixing;
Wherein, in tailings in vanadium extraction, iron level is 26.5wt%, and the content of Vanadium Pentoxide in FLAKES is 2.5wt%, and the content of chromium sesquioxide is 2.4wt%, and manganese oxide, silicon-dioxide and aluminium sesquioxide content sum are 29.6wt%; The fixed carbon content of coal dust is 72.3%, and ash content and volatile content sum are 26.5%, and calorific value is 27928KJ Kg
-1; Polyvinyl alcohol molecule amount is 180000, and concentration is the aqueous solution of 6wt%;
B, pressure forming: be pressed into green-ball at forming pressure 11MPa;
C, roasting: by green-ball roasting 15min at 850 DEG C, to obtain final product.
After tested, green pellets ultimate compression strength is 40 Ns/ball, and dropping strength is 12 times/ball; After roasting, tailings in vanadium extraction carbonaceous pelletizing ultimate compression strength is 320 Ns/ball, and dropping strength is 40 times/ball.
The preparation of embodiment 4 tailings in vanadium extraction carbonaceous pelletizing of the present invention
A, mixing of materials: by Ti Fan Wei Zha ﹕ Peng Run Tu ﹕ Ju Yi Xi Chun ﹕ Mei Fen ﹕ moisture by weight 100 ﹕ 0.6 ﹕ 0.5 ﹕ 18 ﹕ 12 Homogeneous phase mixing;
Wherein, in tailings in vanadium extraction, iron level is 28.9wt%, and the content of Vanadium Pentoxide in FLAKES is 2.1wt%, and the content of chromium sesquioxide is 3.0wt%, and manganese oxide, silicon-dioxide and aluminium sesquioxide content sum are 27.3wt%; The fixed carbon content of coal dust is 80.4%, and ash content and volatile content sum are 19.2%, and calorific value is 28677KJ Kg
-1; Polyvinyl alcohol molecule amount is 200000, and concentration is the aqueous solution of 9wt%;
B, pressure forming: be pressed into green-ball at forming pressure 12MPa;
C, roasting: by green-ball roasting 10min at 650 DEG C, to obtain final product.
After tested, green pellets ultimate compression strength is 40 Ns/ball, and dropping strength is 15 times/ball; After roasting, tailings in vanadium extraction carbonaceous pelletizing ultimate compression strength is 120 Ns/ball, and dropping strength is 35 times/ball.
The preparation of embodiment 5 tailings in vanadium extraction carbonaceous pelletizing of the present invention
A, mixing of materials: by Ti Fan Wei Zha ﹕ Peng Run Tu ﹕ Ju Yi Xi Chun ﹕ Mei Fen ﹕ moisture by weight 100 ﹕ 0.9 ﹕ 0.5 ﹕ 18 ﹕ 12 Homogeneous phase mixing;
Wherein, in tailings in vanadium extraction, iron level is 27.6wt%, and the content of Vanadium Pentoxide in FLAKES is 1.9wt%, and the content of chromium sesquioxide is 2.6wt%, and manganese oxide, silicon-dioxide and aluminium sesquioxide content sum are 29.4wt%; The fixed carbon content of coal dust is 75.5%, and ash content and volatile content sum are 24.3%, and calorific value is 29647KJ Kg
-1; Polyvinyl alcohol molecule amount is 200000, and concentration is the aqueous solution of 10wt%;
B, pressure forming: be pressed into green-ball at forming pressure 11MPa;
C, roasting: by green-ball roasting 15min at 850 DEG C, to obtain final product.
After tested, green pellets ultimate compression strength is 30 Ns/ball, and dropping strength is 10 times/ball; After roasting, tailings in vanadium extraction carbonaceous pelletizing ultimate compression strength is 350 Ns/ball, and dropping strength is 45 times/ball.
The preparation of embodiment 6 tailings in vanadium extraction carbonaceous pelletizing of the present invention
A, mixing of materials: by Ti Fan Wei Zha ﹕ Peng Run Tu ﹕ Ju Yi Xi Chun ﹕ Mei Fen ﹕ moisture by weight 100 ﹕ 0.8 ﹕ 0.5 ﹕ 18 ﹕ 12 Homogeneous phase mixing;
Wherein, in tailings in vanadium extraction, iron level is 32wt%, and the content of Vanadium Pentoxide in FLAKES is 2.5wt%, and the content of chromium sesquioxide is 1.8wt%, and manganese oxide, silicon-dioxide and aluminium sesquioxide content sum are 25wt%; The fixed carbon content of coal dust is 79.1%, and ash content and volatile content sum are 19.9%, and calorific value is 28461KJ Kg
-1; Polyvinyl alcohol molecule amount is 180000, and concentration is the aqueous solution of 6wt%;
B, pressure forming: be pressed into green-ball at forming pressure 10MPa;
C, roasting: by green-ball roasting 10min at 900 DEG C, to obtain final product.
After tested, green pellets ultimate compression strength is 45 Ns/ball, and dropping strength is 15 times/ball; After roasting, tailings in vanadium extraction carbonaceous pelletizing ultimate compression strength is 400 Ns/ball, and dropping strength is 50 times/ball.
Claims (15)
1. tailings in vanadium extraction carbonaceous pelletizing, is characterized in that being made up of following parts by weight of component: tailings in vanadium extraction 100 parts, wilkinite 0.6 ~ 0.9 part, polyvinyl alcohol 0.3 ~ 0.5 part, coal dust 12 ~ 18 parts, 8 ~ 12 parts, water; Wherein, in described tailings in vanadium extraction, iron level is 26 ~ 32wt%, and the content of Vanadium Pentoxide in FLAKES is 1.5 ~ 2.5wt%, and the content of chromium sesquioxide is 1.5 ~ 3.0wt%, and manganese oxide, silicon-dioxide and aluminium sesquioxide content sum are 23 ~ 30wt%.
2. tailings in vanadium extraction carbonaceous pelletizing according to claim 1, it is characterized in that: in described tailings in vanadium extraction, iron level is 32wt%, the content of Vanadium Pentoxide in FLAKES is 2wt%, and the content of chromium sesquioxide is 2.2wt%, and manganese oxide, silicon-dioxide and aluminium sesquioxide content sum are 25wt%.
3. tailings in vanadium extraction carbonaceous pelletizing according to claim 1, is characterized in that: the fixed carbon content>=70wt% of described coal dust, ash content and volatile content sum≤30wt%, calorific value>=25000KJKg
-1.
4. tailings in vanadium extraction carbonaceous pelletizing according to claim 2, is characterized in that: the fixed carbon content>=70wt% of described coal dust, ash content and volatile content sum≤30wt%, calorific value>=25000KJKg
-1.
5. tailings in vanadium extraction carbonaceous pelletizing according to claim 3, is characterized in that: the fixed carbon content of described coal dust is 75 ~ 85wt%; Ash content and volatile content sum are 15 ~ 25wt%; Calorific value is 27000 ~ 30000KJKg
-1.
6. tailings in vanadium extraction carbonaceous pelletizing according to claim 4, is characterized in that: the fixed carbon content of described coal dust is 75 ~ 85wt%; Ash content and volatile content sum are 15 ~ 25wt%; Calorific value is 27000 ~ 30000KJKg
-1.
7. tailings in vanadium extraction carbonaceous pelletizing according to claim 5, is characterized in that: the fixed carbon content of described coal dust is 79.33wt%; Ash content and volatile content sum are 19.98wt%; Calorific value is 28511KJKg
-1.
8. tailings in vanadium extraction carbonaceous pelletizing according to claim 6, is characterized in that: the fixed carbon content of described coal dust is 79.33wt%; Ash content and volatile content sum are 19.98wt%; Calorific value is 28511KJKg
-1.
9. the tailings in vanadium extraction carbonaceous pelletizing according to any one of claim 1 ~ 8, is characterized in that: the aqueous solution of described polyvinyl alcohol to be concentration be 3 ~ 10wt%.
10. tailings in vanadium extraction carbonaceous pelletizing according to claim 9, is characterized in that: the aqueous solution of described polyvinyl alcohol to be concentration be 6wt%.
The preparation method of the tailings in vanadium extraction carbonaceous pelletizing described in 11. any one of claim 1 ~ 10, is characterized in that comprising the steps:
A, mixing of materials: take each component according to proportioning, and mix;
B, shaping: by the material compacting balling-up mixed, to obtain green-ball;
C, roasting: by green-ball roasting, to obtain final product.
The preparation method of 12. tailings in vanadium extraction carbonaceous pelletizings according to claim 11, is characterized in that: in described b step, forming pressure is 10 ~ 14MPa.
The preparation method of 13. tailings in vanadium extraction carbonaceous pelletizings according to claim 11 or 12, is characterized in that: described step c is roasting 10 ~ 20min at 650 ~ 900 DEG C.
The preparation method of 14. tailings in vanadium extraction carbonaceous pelletizings according to claim 11 or 12, is characterized in that: step c is carried out in air.
The preparation method of 15. tailings in vanadium extraction carbonaceous pelletizings according to claim 13, is characterized in that: step c is carried out in air.
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| CN1814813A (en) * | 2006-03-08 | 2006-08-09 | 攀枝花钢铁(集团)公司 | Method for separating and extracting iron, vanadium and titanium from vanadium-titanium magnetite |
| CN101838743A (en) * | 2010-06-23 | 2010-09-22 | 攀枝花学院 | Method for recovering ferrum, vanadium, chromium and gallium from vanadium extraction tailings |
| CN103290159A (en) * | 2013-06-06 | 2013-09-11 | 昆明钢铁集团有限责任公司 | Method for producing directly-reduced iron powder in microwave heating manner |
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| CN1814813A (en) * | 2006-03-08 | 2006-08-09 | 攀枝花钢铁(集团)公司 | Method for separating and extracting iron, vanadium and titanium from vanadium-titanium magnetite |
| CN101838743A (en) * | 2010-06-23 | 2010-09-22 | 攀枝花学院 | Method for recovering ferrum, vanadium, chromium and gallium from vanadium extraction tailings |
| CN103290159A (en) * | 2013-06-06 | 2013-09-11 | 昆明钢铁集团有限责任公司 | Method for producing directly-reduced iron powder in microwave heating manner |
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Denomination of invention: Carbon containing pellets from vanadium extraction tailings and their preparation method Granted publication date: 20150805 Pledgee: Haining rural commercial bank Limited by Share Ltd. Zhejiang branch Pledgor: Haining Qianjiang Xingye Investment Development Co.,Ltd. Registration number: Y2024980001393 |