CN110129595B - Method for improving yield of AlV55 vanadium-aluminum alloy - Google Patents
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Abstract
The invention relates to a method for improving the yield of AlV55 vanadium-aluminum alloy, belonging to the technical field of metallurgy. The invention solves the technical problem that the yield of AlV55 alloy prepared by the existing one-step method is low. The invention provides a method for improving the yield of AlV55 vanadium-aluminum alloy, a2O5Weighing metal Al and AlV55 crushed alloy, and then loading into a charging bucket for uniformly mixing; b. b, pouring the mixed material obtained in the step a into a reactor, igniting a magnesium strip to trigger reaction, and carrying out aluminothermic reduction smelting; c. opening the reactor, performing sand blasting and crushing treatment to obtain an AlV55 vanadium-aluminum alloy finished product, and controlling the V content in the AlV55 vanadium-aluminum alloy to be 59-59.6% in terms of weight fraction. The sand blasting treatment adopts iron sand and aluminum sand for sand blasting. The invention can improve the yield of AlV55 vanadium-aluminum alloy to more than 70%, and the alloy surface is smooth, without shrinkage cavity and slag.
Description
Technical Field
The invention belongs to the field of metallurgy, and particularly relates to a method for improving the yield of AlV55 vanadium-aluminum alloy.
Background
The vanadium-aluminum alloy is used as an important additive of titanium alloy, is commonly used for improving the performance of the titanium alloy, has more advantages in the aspects of strength, toughness, formability, corrosion resistance, high temperature resistance and the like, and is an important material for manufacturing seaplanes, gliders, automobile engine systems, automobile chassis parts, golf clubs and medical devices.
With the rapid development of the economy of China and the continuous improvement of the consumption level of people, the national defense strength and the space navigation strength of China are obviously enhanced, and the titanium alloy applied to the fields of civil industry and aerospace has a great growth tendency. The Ti-6Al-4V titanium alloy is mainly prepared from AlV55 vanadium aluminum alloy in China, the market demand is large, but the yield of the AlV55 alloy prepared by the existing one-step method is generally low.
Disclosure of Invention
The invention solves the technical problem that the yield of AlV55 alloy prepared by the existing one-step method is low.
The technical scheme for solving the problems is to provide a method for improving the yield of AlV55 vanadium-aluminum alloy, which comprises the following steps:
a. will V2O5Weighing metal Al and AlV55 crushed alloy, and then loading into a charging bucket for uniformly mixing;
b. b, pouring the mixed material obtained in the step a into a reactor, igniting a magnesium strip to trigger reaction, and carrying out aluminothermic reduction smelting;
c. opening the reactor, performing sand blasting and crushing treatment to obtain an AlV55 vanadium-aluminum alloy finished product, and controlling the V content in the AlV55 vanadium-aluminum alloy to be 59-59.8% in terms of weight fraction.
Further, the content of V in the AlV55 vanadium-aluminum alloy is controlled to be 59-59.6% in terms of weight fraction.
Wherein, V in step a2O5The mass ratio of the metal Al to the AlV55 crushed alloy is 1: 0.876 to 0.884: 0.135 to 0.143.
Wherein, V in step a2O5The granularity is less than or equal to 120 meshes, the granularity of metal Al is less than or equal to 80 meshes, and the granularity of AlV55 crushed alloy is less than or equal to 10 mm.
Wherein, the reactor in the step b is a reactor with an integrally cast lining.
Wherein, the reactor in the step b is a straight-tube furnace with an integrally cast lining.
Wherein, the sand blasting treatment adopts iron sand and aluminum sand for sand blasting.
Wherein, the sand blasting treatment is firstly carried out for 3min to 5min by iron sand blasting, and then is carried out for 5min to 10min by aluminum sand blasting after being cleaned.
Wherein the granularity of the iron sand is 0.5-1 mm, and the granularity of the aluminum sand is 0.5-1.5 mm.
Wherein the sand blasting pressure is 0.5MPa to 0.8 MPa.
The invention has the beneficial effects that:
on the basis of one-step aluminothermic reduction, the yield of AlV55 vanadium-aluminum alloy can be improved to more than 70% by controlling the content of V; according to the invention, the existing reactor is improved, and the reaction furnace body with the integrally cast lining is adopted, so that the problem of apparent quality of the alloy caused by knotting of refractory materials of the reactor can be reduced, the surface of the alloy is smooth, shrinkage cavities are avoided, and slag is avoided; the iron sand and the aluminum sand are adopted for sand blasting, so that the sticky slag on the surface of the alloy cake can be well treated, and the loss of the alloy is reduced to the minimum; the invention has simple process and low cost.
Drawings
FIG. 1 is a reactor body prior to casting;
FIG. 2 shows the reactor body after casting.
Detailed Description
The invention provides a method for improving the yield of AlV55 vanadium-aluminum alloy, which comprises the following steps:
a. will V2O5Weighing metal Al and AlV55 crushed alloy, and then loading into a charging bucket for uniformly mixing;
b. b, pouring the mixed material obtained in the step a into a reactor, igniting a magnesium strip to trigger reaction, and carrying out aluminothermic reduction smelting;
c. opening the reactor, performing sand blasting and crushing treatment to obtain an AlV55 vanadium-aluminum alloy finished product, and controlling the V content in the AlV55 vanadium-aluminum alloy to be 59-59.8% in terms of weight fraction.
According to the invention, the V content in the AlV55 vanadium-aluminum alloy is controlled to be 59-59.8%, at the moment, more phases of alloy crystals are in a solid solution structure, relatively less brittle phases are generated, less fine powder can be generated during subsequent crushing of the alloy, and the yield is greatly improved.
Preferably, the content of V in the AlV55 vanadium-aluminum alloy is controlled to be 59-59.6 percent in weight fraction.
In particular, in order to better control the V content, V is added in step a2O5The mass ratio of metal Al to AlV55 crushed alloy is 1: 0.876 to 0.884: weighing 0.135-0.143, and then loading into a charging bucket to be uniformly mixed.
Wherein, V in step a2O5The granularity is less than or equal to 120 meshes, the granularity of metal Al is less than or equal to 80 meshes, and the granularity of AlV55 crushed alloy is less than or equal to 10 mm.
And b, pouring the mixed materials into a reactor, and igniting the magnesium tape to trigger reaction. The mixed materials are subjected to aluminothermic smelting in a reactor, and the following reactions occur:
3V2O5+10Al＝6V+5Al2O3
furthermore, the reactor is arranged in a closed space, so that the problems of overlarge pollution and safety caused by smoke dust generated by reaction can be avoided.
The existing aluminothermic smelting reactor usually adopts magnesium sand knotting, the knotting strength is not enough, the burning loss of a furnace lining is serious, a new furnace lining needs to be knotted again after each furnace smelting is finished, the economic loss and the labor intensity are increased, and the apparent quality problem of alloy is easily caused by knotting of refractory materials (namely pouring layers) of the reactor.
Further, one realization of the reactor with integrally cast inner lining can be obtained by the following steps:
1) barbs are welded on the inner wall of the furnace body, so that the pouring layer is better combined with the inner wall of the furnace body;
2) pouring the corundum casting material into a stirrer, and adding water to fully mix and stir;
3) pouring the mixed casting material into an empty furnace bottom, vibrating by using a vibrating rod at the same time to ensure that the material layer is compact, flat and free of gaps, naturally drying, then placing a mold in the center of the furnace bottom, filling the mixed casting material between the furnace shell and the mold, and continuously vibrating by using the vibrating rod until the material layer is flat and compact;
4) and placing the poured furnace body and the mold for natural air drying, then taking out the mold, and baking the furnace body by a baking system to obtain a pouring furnace, namely the reactor.
Wherein, the sand blasting process adopts iron sand and aluminum sand for sand blasting.
The sand blasting can well treat the sticky slag on the surface of the alloy cake, so that the loss of the alloy can be minimized. Different from the prior art, the sand blasting treatment of the invention adopts two kinds of sand, namely iron sand and aluminum sand, while the prior art only sprays the aluminum sand.
Wherein, the iron sand blasting is firstly carried out for 3min to 5min in the sand blasting process, and the aluminum sand blasting is carried out for 5min to 10min after the cleaning.
The iron sand hardness is high, carries out iron sand earlier and handles can clear away most the sticky sediment that does not handle well, and aluminium sand hardness is softer relatively, and last one spouts can carry out better micro-processing, reduces the pollution to the alloy simultaneously.
Wherein the granularity of the iron sand is 0.5-1 mm, and the granularity of the aluminum sand is 0.5-1.5 mm.
Wherein the sand blasting pressure is 0.5MPa to 0.8 MPa.
The crushing treatment after sand blasting is carried out according to a conventional process, and specifically, the whole alloy cake can be crushed into 3-5 blocks, and then the 3-5 blocks are placed into a three-stage crusher to be crushed into 1-6 mm.
The invention is further illustrated and described by the following examples.
Wherein, the yield of the alloy is the weight of the packaged finished product/the weight of the alloy cake multiplied by 100 percent.
Example 1
Weighing high-purity V2O5150kg (granularity: 120-160 meshes), 132.3kg of high-purity metal Al (granularity: 80-120 meshes) and 21kg of AlV55 crushed alloy (granularity: 5-10 mm, V content 59.1%) are put into a charging bucket, mixed uniformly and poured into a reactor with an integral casting lining, a magnesium tape is ignited to trigger reaction, and the reactor is opened after 24 hours. Carrying out sand blasting treatment, wherein the granularity of the iron sand is 0.5mm, and the granularity of the aluminum sand is 0.5 mm. Firstly carrying out iron sand blasting for 3min, cleaning, then carrying out aluminum sand blasting for 5min, wherein the blasting pressure is 0.5MPa, and carrying out conventional crushing treatment after blasting to obtain the AlV55 alloy with the V content of 59.3% and the yield of 71%.
Example 2
Weighing high-purity V2O5100kg (granularity is less than or equal to 160 meshes), 87.7kg of high-purity metal Al (granularity is less than or equal to 120 meshes) and 13.6kg of AlV55 crushed alloy (granularity is less than or equal to 5mm and V content is 59.2%) are put into a charging bucket, mixed uniformly and poured into a reactor with an integral casting lining, a magnesium tape is ignited to trigger reaction, and the reactor is opened after 24 hours. Carrying out sand blasting treatment, wherein the granularity of the iron sand is 0.8mm, and the granularity of the aluminum sand is 1.0 mm. Carrying out iron sand blasting for 4min, cleaning, then carrying out aluminum sand blasting for 8min, wherein the blasting pressure is 0.7MPa, and carrying out conventional crushing treatment after blasting to obtain the AlV55 alloy with the V content of 59.1% and the yield of 70.6%.
Example 3
Weighing high-purity V2O5200kg (granularity: 120-160 meshes), 176kg of high-purity metal Al (granularity: less than or equal to 80 meshes) and 27.8kg of AlV55 crushed alloy (granularity: 3-8 mm, V content 59.5%) are put into a charging bucket, mixed uniformly and poured into a reactor with an integral casting lining, a magnesium tape is ignited to trigger reaction, the reactor is opened after 24 hours, sand blasting is carried out, and the granularity of iron sand is 1mm and the granularity of aluminum sand is 1.5 mm. Firstly carrying out iron sand blasting for 5min, cleaning, then carrying out aluminum sand blasting for 10min, wherein the blasting pressure is 0.8MPa, and carrying out conventional crushing treatment after blasting to obtain the AlV55 alloy with the V content of 59.4% and the yield of 71.5%.
Comparative example 1
Weighing high-purity V2O5150kg (granularity: 120-160 meshes), 132.3kg of high-purity metal Al (granularity: 80-120 meshes) and 21kg of AlV55 crushed alloy (granularity: 5-10 mm, V content 59.1%) are put into a charging bucket, mixed uniformly and poured into a common knotted furnace lining reactor, a magnesium tape is ignited to trigger reaction, the reactor is opened after 24 hours, and AlV55 alloy with the V content of 59% and the yield of 65.1% is obtained after aluminum sand blasting and crushing treatment.
Comparative example 2
Weighing high-purity V2O5100kg of (granularity is less than or equal to 160 meshes), 87.7kg of high-purity metal Al (granularity is less than or equal to 120 meshes) and 13.6kg of AlV55 crushed alloy (granularity is less than or equal to 5mm and V content is 59.2%) are put into a charging bucket, mixed uniformly and poured into a common knotted furnace lining reactor, a magnesium tape is ignited to trigger reaction, the reactor is opened after 24h, and the AlV55 alloy with the V content of 58.9% and the yield of 66.2% is obtained after aluminum sand blasting and crushing treatment.
Comparative example 3
Weighing high-purity V2O5200kg of (granularity: 120-160 meshes), 176kg of high-purity metal Al (granularity: less than or equal to 80 meshes) and 27.8kg of AlV55 crushed alloy (granularity: 3-8 mm, V content: 59.5%) are put into a charging bucket, mixed uniformly and poured into a common knotting furnace lining reactor, a magnesium tape is ignited to trigger reaction, the reactor is opened after 24 hours, and AlV55 alloy with the V content of 59.2% and the yield of 67.3% is obtained after aluminum sand blasting and crushing treatment.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (6)
1. The method for improving the yield of the AlV55 vanadium-aluminum alloy is characterized by comprising the following steps of:
a. will V2O5Weighing metal Al and AlV55 crushed alloy, and then loading into a charging bucket for uniformly mixing;
b. b, pouring the mixed material obtained in the step a into a reactor, igniting a magnesium strip to trigger reaction, and carrying out aluminothermic reduction smelting; the reactor is a straight cylinder furnace with integrally cast lining; the reactor with the integrally cast lining can be obtained by the following steps:
1) barbs are welded on the inner wall of the furnace body, so that the pouring layer is better combined with the inner wall of the furnace body;
2) pouring the corundum casting material into a stirrer, and adding water to fully mix and stir;
3) pouring the mixed casting material into an empty furnace bottom, vibrating by using a vibrating rod at the same time to ensure that the material layer is compact, flat and free of gaps, naturally drying, then placing a mold in the center of the furnace bottom, filling the mixed casting material between the furnace shell and the mold, and continuously vibrating by using the vibrating rod until the material layer is flat and compact;
4) placing the poured furnace body and the mold for natural air drying, then taking out the mold, and baking the furnace body by a baking system to obtain a pouring furnace which is a reactor;
c. opening a reactor, performing sand blasting and crushing treatment to obtain an AlV55 vanadium-aluminum alloy finished product, and controlling the V content in the AlV55 vanadium-aluminum alloy to be 59-59.8% in terms of weight fraction; the sand blasting treatment adopts iron sand and aluminum sand for sand blasting; the sand blasting treatment is firstly carried out for 3min to 5min by iron sand blasting, and then is carried out for 5min to 10min by aluminum sand blasting after being cleaned.
2. The method for improving the yield of the AlV55 vanadium-aluminum alloy as claimed in claim 1, wherein: the V content in the AlV55 vanadium-aluminum alloy is controlled to be 59-59.6 percent in terms of weight fraction.
3. The method for improving the yield of the AlV55 vanadium-aluminum alloy according to claim 1 or 2, wherein the method comprises the following steps: step a said V2O5The mass ratio of the metal Al to the AlV55 crushed alloy is 1: 0.876 to 0.884: 0.135 to 0.143.
4. The method for improving the yield of the AlV55 vanadium-aluminum alloy as claimed in claim 1, wherein: step a said V2O5The granularity is less than or equal to 120 meshes, the granularity of metal Al is less than or equal to 80 meshes, and the granularity of AlV55 crushed alloy is less than or equal to 10 mm.
5. The method for improving the yield of the AlV55 vanadium-aluminum alloy as claimed in claim 1, wherein: the granularity of the iron sand is 0.5-1 mm, and the granularity of the aluminum sand is 0.5-1.5 mm.
6. The method for improving the yield of the AlV55 vanadium-aluminum alloy as claimed in claim 1, wherein: the sand blasting pressure is 0.5 MPa-0.8 MPa.
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| WO2008067614A1 (en) * | 2006-12-08 | 2008-06-12 | Commonwealth Scientific And Industrial Research Organisation | Separation method for metal recovery |
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| CN101906546B (en) * | 2010-07-14 | 2012-11-28 | 承德天大钒业有限责任公司 | Method for preparing vanadium-aluminum alloy |
| CN102330007B (en) * | 2011-10-24 | 2012-10-03 | 肖景波 | Preparation method and production system of aircraft grade vanadium-aluminum alloy |
| CN103849787B (en) * | 2014-02-26 | 2015-12-09 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of preparation method of aerospace level vananum |
| CN204151402U (en) * | 2014-10-15 | 2015-02-11 | 攀钢集团攀枝花钢钒有限公司 | A kind of vananum smelting furnace |
| CN104611601A (en) * | 2015-02-12 | 2015-05-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium-aluminum alloy and preparation method thereof |
| CN106541335A (en) * | 2016-10-08 | 2017-03-29 | 河钢股份有限公司承德分公司 | The method for removing the oxide-film and alloy slag inclusion on vananum surface |
| CN107190163A (en) * | 2017-05-22 | 2017-09-22 | 攀钢集团钒业有限公司 | A kind of removal of impurity processing method of vananum finished product |
| CN108330369B (en) * | 2018-02-09 | 2020-06-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for improving yield of AlV55 alloy |
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| WO2008067614A1 (en) * | 2006-12-08 | 2008-06-12 | Commonwealth Scientific And Industrial Research Organisation | Separation method for metal recovery |
| CN106350675A (en) * | 2015-07-16 | 2017-01-25 | 东北大学 | Preparation method of high-quality AlV55 alloy |
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