CN117363912A - Aluminum titanium boron wire intermediate alloy smelting production process - Google Patents
Aluminum titanium boron wire intermediate alloy smelting production process Download PDFInfo
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- CN117363912A CN117363912A CN202311341819.XA CN202311341819A CN117363912A CN 117363912 A CN117363912 A CN 117363912A CN 202311341819 A CN202311341819 A CN 202311341819A CN 117363912 A CN117363912 A CN 117363912A
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- -1 Aluminum titanium boron Chemical compound 0.000 title claims abstract description 43
- 239000000956 alloy Substances 0.000 title claims abstract description 43
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000003723 Smelting Methods 0.000 title claims abstract description 15
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims abstract description 93
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 93
- 239000011591 potassium Substances 0.000 claims abstract description 93
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 69
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 68
- 239000007788 liquid Substances 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 27
- 239000000203 mixture Substances 0.000 claims abstract description 27
- 238000003756 stirring Methods 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 20
- 238000007670 refining Methods 0.000 claims abstract description 20
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 9
- 238000002844 melting Methods 0.000 claims abstract description 8
- 230000008018 melting Effects 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000006722 reduction reaction Methods 0.000 claims abstract description 8
- 238000005303 weighing Methods 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims description 59
- 238000007872 degassing Methods 0.000 claims description 11
- 239000002893 slag Substances 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 7
- 150000003839 salts Chemical class 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 238000010009 beating Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000009749 continuous casting Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 239000012535 impurity Substances 0.000 abstract description 8
- 238000002360 preparation method Methods 0.000 abstract description 6
- 150000004673 fluoride salts Chemical class 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 229910010038 TiAl Inorganic materials 0.000 description 9
- RXCBCUJUGULOGC-UHFFFAOYSA-H dipotassium;tetrafluorotitanium;difluoride Chemical compound [F-].[F-].[F-].[F-].[F-].[F-].[K+].[K+].[Ti+4] RXCBCUJUGULOGC-UHFFFAOYSA-H 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- 229910000521 B alloy Inorganic materials 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a novel process for smelting and producing an aluminum-titanium-boron wire intermediate alloy, relates to the technical field of aluminum alloy material preparation, and solves the technical problem that other substances are added in the conventional aluminum-titanium-boron wire production process to introduce new impurities into a system to be brought into refined alloy, so that the refining effect is weakened. The invention comprises the following steps: respectively weighing pure aluminum, potassium fluoborate and potassium fluotitanate, and mixing part of potassium fluotitanate and all potassium fluoborate to obtain a mixture; melting aluminum ingots to obtain aluminum liquid, sequentially adding the mixture into the aluminum liquid at intervals, then adding the rest potassium fluotitanate, and continuously stirring; stirring and reacting for 20-40 min to finish the reduction reaction. The method adopts the method of firstly preparing the mixture and adding the fluoride salt at intervals, thereby effectively improving the TiB in the aluminum-titanium-boron wire intermediate alloy 2 The content of impurities is reduced, and the refining effect is improved.
Description
Technical Field
The invention relates to the technical field of aluminum alloy material preparation, in particular to a smelting production process of an aluminum-titanium-boron wire intermediate alloy.
Background
The aluminum-titanium-boron wire intermediate alloy is a grain refiner for refining grains most commonly used for producing aluminum and aluminum alloy, and the aluminum-titanium-boron wire intermediate alloy can refine a base material and produce good grain refinement of a cast product in the production process of the intermediate aluminum alloy, so that the product quality is more stable. At present, the industrialized production of aluminum titanium boron wire is mainly prepared by adopting a fluoride salt method and carrying out chemical reaction on mixed salt of potassium fluotitanate and potassium fluoborate and liquid aluminum. The preparation method of the aluminum-titanium-boron wire intermediate alloy by the fluoride salt method mainly comprises the following reactions:
6KBF 4 +3K 2 TiF 6 +10Al＝3TiB 2 +9KAlF 4 +K 3 AlF 6 (1)
3K 2 TiF 6 +13Al＝3TiAl 3 + 3KAlF 4 + K 3 AlF 6 (2)
2KBF 4 +3Al＝ AlB 2 + 2KAIF 4 (3)
in Al-Ti-B system, mainly comprises TiB 2 And TiAl 3 Particles of TiAl 3 The particles can be dissolved after being added, so as to improve the content of dissolved titanium in the melt and play a key role in TiB 2 In the form of particles, the smaller the diameter thereof, the more crystalline it is to aluminum or aluminum alloyThe stronger the grain refining ability.
The prior art generally adopts a rare earth doping method to improve TiAl in aluminum titanium boron 3 、TiB 2 Particle morphology and size to account for TiB 2 The problem of easy aggregation of particles, such as Chinese patent publication No. CN112011704A, is improved by adding rare earth oxide or rare earth fluoride 3 、TiB 2 The grain refiner with higher refining performance is obtained by the size, morphology and distribution of the particles.
As disclosed in the patent with publication No. CN115305376A, the TiB is effectively improved by adding a certain amount of vanadium and potassium into the aluminum titanium boron wire 2 The surface property of the particles, thereby obtaining the grain refiner with higher refining property.
Also as proposed in the patent with publication number CN104561619A, a preparation method of aluminum titanium boron wire grain refiner is provided, firstly, potassium chloride is added into aluminum liquid to make the aluminum liquid melt and then cover the surface of the aluminum liquid; then adding potassium fluoborate into the aluminum liquid to uniformly mix, adding potassium fluotitanate into the aluminum liquid, heating and stirring to completely react to obtain alloy aluminum liquid, avoiding the phenomenon of air holes or looseness caused by oxidation or gas suction of the aluminum liquid, and improving the elongation of the aluminum titanium boron wire.
However, according to the preparation method, the morphology and the size of the particles are improved by adding rare earth oxide or rare earth fluoride, vanadium, potassium and potassium chloride, but the additive is brought into the aluminum liquid of the system to form metal salt or impurities, so that the metal salt or impurities are difficult to effectively and thoroughly remove from the aluminum-titanium-boron alloy, and in a specific operation, the impurities are easily brought into the refined alloy along with a refiner, so that the refining effect of the aluminum alloy is weakened.
In the preparation method of the aluminum titanium boron wire grain refiner disclosed in the patent with publication number of CN104561619A, potassium fluoborate is added into aluminum liquid to be uniformly mixed, and then the potassium fluotitanate is added into the aluminum liquid, so that when the Al-Ti-B intermediate alloy is prepared, although chemical reactions which occur successively are different, only TiAl is finally generated 3 And TiB 2 The method comprises the steps of carrying out a first treatment on the surface of the But add KBF before 4 Adding K again 2 TiF 4 When except forProduction of TiAl and TiB 2 In addition to generate AlB 2 Due to AlB 2 Resulting in the formation of TiB within the alloy that is practically useful for refining 2 Reduced in number, and in general AIB 2 The nucleation ability of the Al-Ti-B master alloy is very poor, and therefore, the refining ability of the Al-Ti-B master alloy under the phase composition is remarkably reduced.
Disclosure of Invention
The invention provides a smelting production process of an aluminum-titanium-boron wire intermediate alloy, which aims to solve the technical problem that other substances are added in the existing aluminum-titanium-boron wire production process to introduce new impurities into a system to be brought into a refined alloy, so that the refining effect is weakened.
The embodiment of the invention is realized by the following technical scheme:
a smelting production process of aluminum titanium boron wire intermediate alloy comprises the following steps:
s1: raw material selection: respectively weighing pure aluminum, potassium fluoborate and potassium fluotitanate, and mixing part of potassium fluotitanate and all potassium fluoborate to obtain a mixture;
s2: melting aluminum and mixing: melting aluminum ingot to obtain aluminum liquid, adding the mixture into the aluminum liquid at intervals, then adding the residual potassium fluotitanate, and continuously stirring;
s3: reduction reaction: stirring and reacting for 20-40 min, pouring out the generated salt after the reduction reaction is completed, and pouring out the aluminum-titanium-boron intermediate alloy from the cast ingot;
s4: slag beating and refining: s3, obtaining an aluminum titanium boron intermediate alloy ingot, remelting the ingot, and adding an aluminum alloy slag removing agent to remove slag and refine;
s5: stirring and degassing: regulating the temperature of the aluminum liquid after deslagging and refining, stirring again, degassing, deslagging and purifying;
s6: and (3) rolling and forming: and (3) guiding the aluminum liquid after degassing and deslagging to enter a continuous casting production line through a launder, stirring, and rolling into the aluminum titanium boron rod.
By adopting the technical scheme, part of potassium fluotitanate and all potassium fluoborate are mixed according to a certain proportion and are added into aluminum liquid for reaction, the aluminum liquid is enough relative to the potassium fluoborate and the potassium fluotitanate, and the reactions (1), (2) and (3) exist simultaneously in a reaction system, wherein for the reaction(1) The potassium fluoborate is excessive relative to the potassium fluotitanate, so the conversion rate of the potassium fluotitanate in the equilibrium state of the reaction (1) is higher than that of the potassium fluoborate, the conversion rate of the potassium fluotitanate is effectively improved, and the rest potassium fluoborate and the potassium fluotitanate respectively react (3) and (2) to respectively generate AlB 2 And TiAl 3 ；
Then, the remaining potassium fluorotitanate is added under stirring, at this time, the potassium fluorotitanate is excessive and the aluminum liquid is insufficient, because the requirement of the reaction (1) for the aluminum liquid amount is low relative to the reactions (2) and (3), the reaction (1) is mainly promoted to proceed under the restriction of the aluminum liquid, the reaction degree of the reaction (1) is improved, and the TiB is improved 2 The content of potassium fluorotitanate, which affects the reactions (2) and (3) in minor proportion, and the reaction (2) is higher in reaction degree than the reaction (3) because of the excess of potassium fluorotitanate, to form TiAl 3 In an amount higher than AlB 2 From thermodynamic calculations and analyses, AIB is found in high temperature Al-Ti-B melts 2 Is less stable than TiB 2 AlB in the presence of Ti 2 Will be toward TiB 2 Transition as shown in reaction (4):
TiAl 3 (s)+AlB 2 (s)＝TiB 2 (s)+4Al(1) (4)
thus, when TiAl 3 The content is higher than AlB 2 When AlB is raised 2 Conversion rate is reduced by AlB 2 At the same time, the TiB content is effectively improved 2 The content is as follows;
in the two processes, the first process of adding the mixture, the potassium fluotitanate shortage, the reaction (1) has high conversion rate of potassium fluotitanate, but TiB 2 Low in TiB content and capable of preventing the early TiB 2 The reaction (2) and (3) are promoted by adding potassium fluotitanate again, and the potassium fluotitanate overreaction (2) has too high reaction degree, so that the reaction (4) AlB 2 The conversion rate is improved, and the AlB is effectively reduced 2 Content, alB is produced by reaction (3) 2 Conversion to TiB 2 Raise TiB 2 Content, subsequent TiB obtaining 2 Because from AlB 2 Obtained through the conversion of the reaction (4), is evenly distributed in a system and is not easy to agglomerate, thus obtaining TiB 2 The content is increased and simultaneously reducedLow AlB 2 The intermediate alloy with the content can effectively improve the refining effect of the alloy.
Preferably, in the step S1, pure aluminum, potassium fluoborate and potassium fluotitanate are respectively weighed according to the mass ratio of the pure aluminum, the potassium fluoborate and the potassium fluotitanate within the range of 1:0.24-0.27:0.1-0.12; wherein the aluminum content of the pure aluminum is more than 99.70 percent.
By adopting the technical scheme, for the reaction (1), the potassium fluotitanate is in total excess, so that the subsequent TiB is ensured 2 The content is higher.
Preferably, in the step S1, the mass ratio of the potassium fluoborate to the part of potassium fluotitanate in the mixture is 2.4-2.8:1.
By adopting the technical scheme, the potassium fluoborate in the mixture is sufficient for the reaction (1), so that the improvement of the conversion rate of the potassium fluotitanate is ensured when the mixture is added for the reaction.
Preferably, in the step S2, when the temperature of the aluminum liquid reaches 700-800 ℃, the mixture and the residual potassium fluotitanate are added according to the weight ratio weighed in the step S1 at intervals of 3-5 min.
By adopting the technical scheme, the temperature of the aluminum liquid meets the reaction requirement, and meets the reaction condition requirement of the thermodynamic forward reaction of the reaction (4).
Preferably, in the step S3, the temperature change is detected every 5min during the stirring process, and the stirring is continued for 20-40 min for reaction.
By adopting the technical scheme, the temperature change is detected so as to control the temperature to meet the conversion condition of the reaction (4).
Preferably, in the step S4, the temperature of the aluminum liquid needs to be maintained at 720-760 ℃ during the deslagging process.
By adopting the technical scheme, the aluminum ingot is remelted by deslagging, and the uniform smelting is ensured to be carried out for deslagging in sequence.
Preferably, in the step S5, the temperature of the degassing and deslagging process is controlled to be 740-780 ℃.
By adopting the technical scheme, the secondary deslagging can raise the temperature, and the deslagging can be conveniently and completely purified.
The technical scheme of the embodiment of the invention has at least the following advantages and beneficial effects:
1. the invention adds fluoride into two processes, the first adding mixture process, improves the conversion rate of potassium fluotitanate, and can prevent the earlier TiB 2 The content is too high to agglomerate, potassium fluotitanate is supplemented later, the reactions (2), (3) and (4) are promoted, and TiB is improved 2 The content is as follows;
2. the present invention, reaction (4) AlB 2 The conversion rate is higher, and the AlB is effectively reduced 2 Content, alB is produced by reaction (3) 2 Conversion to TiB 2 Obtaining TiB subsequently 2 Because from AlB 2 Obtained through the conversion of the reaction (4), is evenly distributed in a system and is not easy to agglomerate, thus obtaining TiB 2 Increased content while decreasing AlB 2 The intermediate alloy with the content can effectively improve the refining effect of the alloy.
Detailed Description
For the pure aluminum used in the following examples and comparative examples, national standard pure aluminum with aluminum content more than 99.70% is adopted, and common chemical pure reagents are adopted for potassium fluotitanate and potassium fluoborate, wherein the purity is more than or equal to 99.5%;
example 1
A novel aluminum titanium boron wire intermediate alloy smelting production process comprises the following steps:
1) Raw material selection: weighing pure aluminum, potassium fluoborate and potassium fluotitanate according to a mass ratio of 1:0.24:0.12, respectively taking 500kg, 120kg and 60kg, preparing all 120kg of potassium fluoborate and 46kg of potassium fluotitanate into a mixture, and independently keeping the rest 14kg of potassium fluotitanate for later use;
2) Melting aluminum and mixing: melting aluminum ingots by using an intermediate frequency furnace, pouring the aluminum ingots into a ladle at the temperature of 750 ℃, respectively adding the mixture and the residual potassium fluotitanate into the aluminum liquid at two intervals according to a proportion, and continuously stirring for 20-40 minutes;
3) Reduction reaction: stirring according to the need in the reduction reaction; detecting temperature change every 5 minutes in the stirring process, reacting for 30 minutes at intervals, pouring out salt generated in the reaction process after the reduction reaction is finished, pouring out the aluminum-titanium-boron intermediate alloy into ingots, and conveniently putting the ingots into an intermediate frequency furnace again;
4) Slag beating and refining: melting the aluminum-titanium-boron intermediate alloy ingot in an intermediate frequency furnace again, adding an aluminum alloy slag removing agent to remove slag in the process of aluminum alloy, wherein the temperature of the aluminum liquid is required to be kept at about 740 ℃, and then degassing and refining;
5) Stirring and degassing: feeding the refined aluminum-titanium-boron intermediate alloy into a heat preservation furnace after deslagging, stirring, degassing and deslagging at the temperature of about 760 ℃, and purifying to ensure that the aluminum-titanium-boron intermediate alloy is uniformly purified;
6) And (3) rolling and forming: after the components of the aluminum-titanium-boron intermediate alloy liquid are uniformly purified, fused and stabilized, the aluminum liquid is led to enter a continuous casting production line through a launder, and the aluminum liquid is stirred again to be rolled into the aluminum-titanium-boron rod.
Example 2
This example differs from example 1 only in the choice of raw materials: pure aluminum, potassium fluoborate and potassium fluotitanate are respectively weighed according to the mass ratio of 1:0.24:0.1, 500kg, 120kg and 50kg are respectively taken, all 120kg of potassium fluoborate and 46kg of potassium fluotitanate are taken to prepare a mixture, and the rest 4kg of potassium fluotitanate is independently reserved.
Example 3
This example differs from example 1 only in the choice of raw materials: pure aluminum, potassium fluoborate and potassium fluotitanate are respectively weighed according to the mass ratio of 1:0.27:0.12, 500kg, 135kg and 60kg are respectively taken, all 135kg of potassium fluoborate and 52kg of potassium fluotitanate are taken to prepare a mixture, and the rest 8kg of potassium fluotitanate is independently reserved.
Example 4
This example differs from example 1 only in the choice of raw materials: pure aluminum, potassium fluoborate and potassium fluotitanate are respectively weighed according to the mass ratio of 1:0.27:0.1, 500kg, 135kg and 50kg are respectively taken, all 135kg of potassium fluoborate and 48kg of potassium fluotitanate are taken to prepare a mixture, and the rest 2kg of potassium fluotitanate is independently reserved.
Comparative example 1
This example differs from example 1 only in the choice of raw materials: pure aluminum, potassium fluoborate and potassium fluotitanate are respectively weighed according to the mass ratio of 1:0.24:0.12, and 500kg, 120kg and 60kg are respectively weighed. When aluminum is melted and mixed, 60kg of potassium fluotitanate and potassium fluoborate are all added into the aluminum liquid.
Specifically, the material addition ratios and the related data of examples 1 to 4 and comparative example 1 are shown in Table 1:
TABLE 1 Material addition ratio and related data for examples 1-4 and comparative example 1
As shown in the table above, examples 1-4 are different technical schemes when the total amount of potassium fluoborate and potassium fluotitanate adopts different mixing ratios and different mixing ratios of the mixture, and comparative examples are technical schemes under the prior art. Compared with the comparative example, the technical scheme of the application comprises the steps of firstly preparing a mixture of potassium fluoborate and potassium fluotitanate, then adding the mixture and the rest potassium fluotitanate at intervals in sequence, dividing the reaction process into two stages, and mainly taking the reaction (1) as the first stage to improve the conversion rate of the potassium fluotitanate; the second stage takes reaction (4) as the main part, reduces AlB 2 The content is increased to TiB 2 The TiB content in the aluminum titanium boron wire intermediate alloy can be effectively improved 2 The content of impurities is reduced, and the refining effect is improved.
Specifically, example 1 has a higher proportion of potassium fluorotitanate than example 2, example 1, the first stage reaction (1) has a higher degree of reaction, and the overall process has a higher degree of reaction in the first stage, corresponding TiB 2 The content is higher; example 1 the same example 1 has a higher proportion of potassium fluorotitanate than example 3, corresponding TiB 2 The content is higher; example 1 the proportion of potassium fluorotitanate was higher in example 1 than in example 4, but in the mixture of example 4 the proportion of potassium fluorotitanate was also lower in the mixture than in example 1, tiB 2 The content is lower than in example 1;
example 2 the total potassium fluoborate to potassium fluotitanate ratio was consistent with example 4, but the potassium fluotitanate ratio was higher in the example 2 composite, example 2TiB 2 The content is higher than in example 4;
and the above examples are TiB 2 The content is higher than that of the comparative example.
Therefore, according to the technical scheme, the TiB in the aluminum titanium boron wire intermediate alloy is effectively improved 2 The content of impurities is reduced, and the refining effect is improved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A smelting production process of an aluminum titanium boron wire intermediate alloy is characterized by comprising the following steps of: the method comprises the following steps:
s1: raw material selection: respectively weighing pure aluminum, potassium fluoborate and potassium fluotitanate, and mixing part of potassium fluotitanate and all potassium fluoborate to obtain a mixture;
s2: melting aluminum and mixing: melting aluminum ingot to obtain aluminum liquid, adding the mixture into the aluminum liquid at intervals, then adding the residual potassium fluotitanate, and continuously stirring;
s3: reduction reaction: stirring and reacting for 20-40 min, pouring out the generated salt after the reduction reaction is completed, and pouring out the aluminum-titanium-boron intermediate alloy from the cast ingot;
s4: slag beating and refining: s3, obtaining an aluminum titanium boron intermediate alloy ingot, remelting the ingot, and adding an aluminum alloy slag removing agent to remove slag;
s5: stirring and degassing: regulating the temperature of the aluminum liquid after deslagging and refining, stirring again, degassing, deslagging and purifying;
s6: and (3) rolling and forming: and (3) guiding the aluminum liquid after degassing and deslagging to enter a continuous casting production line through a launder, stirring, and rolling into the aluminum titanium boron rod.
2. The aluminum titanium boron wire intermediate alloy smelting production process according to claim 1, wherein the process is characterized in that: in the step S1, respectively weighing pure aluminum, potassium fluoborate and potassium fluotitanate according to the mass ratio of the pure aluminum to the potassium fluoborate to the potassium fluotitanate within the range of 1:0.24-0.27:0.1-0.12; wherein the aluminum content of the pure aluminum is more than 99.70 percent.
3. The aluminum titanium boron wire intermediate alloy smelting production process according to claim 2, wherein the process is characterized in that: in the step S1, the mass ratio of the potassium fluoborate to the partial potassium fluotitanate in the mixture is 2.4-2.8:1.
4. A process for smelting an aluminum titanium boron wire intermediate alloy according to claim 3, wherein: in the step S2, when the temperature of the aluminum liquid reaches 700-800 ℃, the mixture and the residual potassium fluotitanate are added according to the weight proportion weighed in the step S1 at intervals of 3-5min in sequence.
5. The aluminum titanium boron wire intermediate alloy smelting production process according to any one of claims 1 to 4, wherein the process is characterized in that: in the step S3, temperature change is detected every 5min in the stirring process, and stirring is continuously carried out for 20-40 min for reaction.
6. The aluminum titanium boron wire intermediate alloy smelting production process according to any one of claims 1 to 4, wherein the process is characterized in that: in the step S4, the temperature of the aluminum liquid needs to be kept at 720-760 ℃ in the slag forming process.
7. The aluminum titanium boron wire intermediate alloy smelting production process according to any one of claims 1 to 4, wherein the process is characterized in that: in the step S5, the temperature of the degassing and deslagging process is controlled to be 740-780 ℃.
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| CN202311341819.XA CN117363912A (en) | 2023-10-17 | 2023-10-17 | Aluminum titanium boron wire intermediate alloy smelting production process |
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