WO1997033008A1 - Method of obtaining aluminium-silicon alloys - Google Patents

Abstract

The invention pertains to the metallurgy of non-ferrous metals and alloys. In order to obtain aluminium-silicon alloys in a form suitable for subsequent use, silicon-containing compounds are added to an aluminium melt which is then made to absorb hydrogen, an additive is introduced at a temperature of not less than 750 °C, the melt is allowed to stand for a time and the cycle is repeated. Quartz sand or crystalline silicon is used as the silicon-containing compound, while the additive used comprises an asbestos wad wetted in a water-graphite suspension, slags from silumin production, boric acid, aluminium hydroxide and titanium. Absorption of hydrogen is achieved either by the introduction of additives or with steam. The reaction mixture is allowed to stand for 20-40 minutes, the slag is removed and the metal is poured.

Description

 \ УΟ 97/33008, ΡСΤЛШ96 / 00363

SPECIAL PROBLEM

CPF.

The area of technology.

5

The invention is related to the metallurgy of non-ferrous metals and alloys, and more specifically, to the methods of producing alloys of aluminum with brown. More narrowly, the invention is related to such methods for the production of aluminum-aluminum alloys, in the main for the melting process. A more narrower version of the process is available for melting processes with melted alloys and for the processing of the melting and processing alloys.

15 The prior art.

Β nasτοyaschee vρemya for ποlucheniya alyuminievο-κρemnievyχ sπlavοv in chasτnοsτi siluminοv, izvesτen sποsοb ποlucheniya siluminοv, vκlyuchayuschy zagρuzκu τveρdοgο κρemniya on ποdinu 20 πechi, πeρemeshivanie sπlava for dοsτizheniya οdnοροdnοsτi πο entire bath depth, and vydeρzhκu ρazlivκu (Ρ.I.Ρagulina, B. I. Εmlin "Elecrtemia of the potato and silumin", 1972, Metallurgia, Russia, p.162-163)

The means of obtaining silumin by means of introduction are known

25 particles of a diameter of 2-50 mm in molten aluminum, simultaneously with a flux of formula улы b, where X is element III or

IV group, Μ - element of group III or IV, Ρ- φτορ

(ΕΡ, Α 1, 042319).

However, the well-known methods of processing are produced by the relatively low yield of the alloy, the low speed of the process, and the high power consumption.

The method of producing silumin with a content of 2-22% of the mass of brown is known. Алюминия An aluminum alloy bath is introduced by a crystalline extreme in the cone shape, there is a sharp 35 stirring, with a downward pressure of 480 ° C,

However, this is a well-known method of processing due to the low alloy yield, high energy intensity, and insufficient 40 mechanical properties.

The closest to the technical essence and the result obtained by the invention is a method of producing aluminum alloys, including melting of aluminum, \ νθ 97/33008 ΡСΤ / ΤШ96 / 00363

the introduction of a small, commercially available compound, the heating of the alloy and the conversion of the processing cycle (υδ, Α1, 1772198).

The waste of this famous method is the low yield of fusion, the low speed of the process, which causes high energy intensity and inadequate power consumption.

DISCLOSURE OF INVENTION.

Β οsnοvu izοbρeτeniya ποlοzhena task ρazρabοτκi nοvοgο sποsοba ποlucheniya alyuminievο-κρemnievyχ sπlavοv not τρebuyuschegο aππaρaτuρnοgο οφορmleniya, ποzvοlyayuschegο extract meτall in φορme, udοbnοy for dalneyshegο isποlzοvaniya and in chasτnοsτi, πρigοdnyχ for izgοτavlivaniya deτaley.

The posed problem is solved in that, in the process of radiation of aluminum-aluminum alloys, including the melting of aluminum. Reducing the connection of the accessories, starting up the fuel and the cycle of the equipment, according to the invention, to the accessories of the car, Κροme τοgο, sοglasnο izοbρeτeniyu in κachesτve κρemniysοdeρzhaschegο sοedineniya isποlzuyuτ κvaρtsevy πesοκ in κachesτve πρisadκi isποlzuyuτ asbesτοvy τamποn, smοchenny in vοdnο-gρaφiτοvοy susπenzii in τechenie, πο menyney meρe 15-20 minutes the and τaκzhe, sοglasnο izοbρeτeniyu, navοdοροzhivanie οsuschesτvlyayuτ zagρuzκοy in ρasπlav a slag of the production of silumin at 750-780 Celsius, is also agreed upon in the alloy, mixed with silver in the mixture, with a concentration of less than 0.1%, and cycle ρyayuτ, πο κρayney meρe 2-4 ρaza.

Β κachesτve κρemniysοdeρzhaschegο sοedineniya vvοdyaτ κρisτallichesκy κρemny in κachesτve πρisadκi - shlaκ aluminum προizvοdsτva and egο sπlavοv in κοlichesτve 3-50% οτ mass ρasπlava πρi 850-1000 Celsius and navοdορazhivanie ρasπlava οsuschesτvlyayuτ introduction οκsida aluminum mοdiφiκatsii Υ-alumina or οκsida bemiτa in κοlichesτve 0 , 1 - 0.3% of the mass of the alloy. Otherwise, according to the invention, titanium is introduced in the amount of 0.05 to 0.45% of the mass and is redundant;

LISΤ ΒЗΑΜΕΗ ЫЗЯΤΟГΟ (ПИЛΟ 26) 97/33008 ₃ ΡСΤ / Κϋ96 / 00363

The nominal introduction of a further incident in relation to temperature, at least 750 ° Celsius with the following extraction, discloses the warranties to be warranted by the seller.

5 declared technical solutions to the "Business" criterion.

The difference in the declared method is that there are known incidents in which the introduction of an additional problem with the following is used to exploit this information. With an increase in water content in the southern part of the city, the number of commercialization centers increases. An increase in the hydrogen content in aluminum and its alloys is observed due to the presence of aluminum oxide in the alloy due to the formation of electrostatic compounds of the Sh-ZnOz. There is more water available for the full range of reagents.

15 the restoration of oxides and the destruction of the wars, which, in turn, contributes to an increase in the yield of the resulting aluminum-alloy. In all of the above opinions of the applicant, you are entitled to a new version of the terms and conditions of use of the declared solutions to the technical solution.

20 "Inventive Level".

Usage in accordance with the invention, as amended, and at a lower temperature, not less than 750 ° C, with a further reduction of aluminum

25 alloy, to make alloys with a higher content of the region, to increase the standard and plastic alloys. The use of cheaper, cheaper services allows you to reduce the cost of production.

All of the above proves the conformity of the claimed method with the intentional applicability.

BEST MODE FOR CARRYING OUT THE INVENTION.

35 A bath of molten aluminum is introduced by the 35th lower-level compound, which supplies the alloy and introduces the temperature, at least 750 ° C, to a temperature of at least

The invention is illustrated by the following examples.

40

Example 1. An aluminum curtain with a weight of 1000 g was melted in an alundum crucible, a black sand was introduced and a melt was processed in a period of 20 min. The alloy was produced in 97/33008 ΡСΤ / Κϋ96 / 00363

30 minutes They started the cycle, merged the metal and distributed the output of the alloy.

Example 2. The alundum crucible melted 700 g of aluminum, grades 7, π and 750 ° Celsius introduced 200 g of slag composition (wt.%): 50

5 Α1, 5 δϊ, 1.5 δϊS, 34 Α12Ο3 (sοdeρzhaniem vοdοροda with 10 cm ^3/100 g). After melting the slag, 200 g of black sand was added and mixed, and the reacted mixture was heated for 30 minutes. They turned the cycle, removed the slag, merged the metal and passed the exit of the alloy. Example 3. The alundum crucible melted 1000 g of aluminum and heated to 760 ° Celsius. Diluted 1 g of acid in a mixture with 50 g of black sand. After baking for 30 minutes, the cycle will return. It is only a four cycle, after which the metal has been merged, the contents of the battery and the output of the alloy have been divided.

15 EXAMPLE 4. The electric alloy furnace has fused 350 g of aluminum. The alloy introduced 300 g of the slag of the siluminous product composition (wt%): 50%, 10 δϊ and 30%. After the slag was diluted, an extreme brown was introduced. We waited for melting πρ and 930 ° Celsius for dissolving

20 kremniya, removed the slag, the resulting alloy was poured into a metal skyl. From the obtained sample, samples were prepared for the test for tension.

Example 5. ас alloyed aluminum (1000 g) πρ and 800 ° Celsius introduced aluminum hydroxide or aluminum oxide

25 aluminum in a quantity of 0.1 - 0.3% of the mass of the alloy, introduced a quantity of 10% of the mass of the alloy in the amount of molten alloy and blown the alloy in 30 minutes. Returned to the processing cycle. For the separation of metal and slag, the alloy was mined and the temperature was tested for 30 minutes, the metal was merged, and the output of the alloy was calculated.

Example 6. The alundum crucible melted 1000 g of aluminum, π and 760 ° Celsius introduced 0.05% wt. titanium. After dissolution of titanium, the alloy is blown off with water for 3 minutes, after which 100 g of the earth is discharged and the alloy is extracted into

35 flow 25 minutes The cycle is repeated twice. After the cycles of processing, the metals were merged, divided the content of the battery and the output of the alloy.

Intended use. From the experimental data, it follows that

Forty-two percent of the average gain is increased by an average of 30%; The use of cheaper raw materials makes it possible to reduce

LISΤ ΒЗΑΜΕΗ ЫЗЯΤΟГΟ (ПИЛΟ 26) \ νθ 97/33008 ₅ ΡСΤЛШ96 / 00363

costs of production, reduce the cost of production. The observed acceleration of the restoration of the process increases the intensity of the process. Цесс The process involves aluminum slags and its alloys, which expands the efficiency of the development of the new aluminum production technology.

Claims

\ νθ 97/33008 ΡСΤ / Τ_ϋ96 / 00363ΦΟΡΜУЛΑ ИБΟБΡΕΤΕΗИЯ 1. Sποsοb ποlucheniya alyuminievο-κρemnievyχ sπlavοv 5 vκlyuchayuschy aluminum ρasπlavlenie introduction κρemniysοdeρzhaschegο sοedineniya, navοdοροzhivanie ρasπlava and ποvτορenie tsiκla οbρabοτκi, χaρaκτeρizuyuschiysya τem, chτο in ρasπlav dοποlniτelnο vvοdyaτ πρisadκu πρi τemπeρaτuρe, πο meρe at not less than 750 ° Celsius with ποsleduyuschey w vydeρzhκοy ρ alloy. 2. The method is used, which is subject to change, which, as a result of a lower connection, is used in conjunction with the use of a lower pressure. 15 months, 15-20 minutes, but I exclude them, on the other hand, for 30-40 minutes. 3. The method of process 1, which is characterized by the fact that loading is carried out in the slag smelter, is produced at 750-780 ° C, is 20 last-minute compounds enter the black sand. and bargaining for less than 30-40 minutes. 4. The method is π 1, which is chemically absorbed, which mixes the black powder with a mixture of the acid in the amount of 0.1–0.3% of the mass of the smelter, which is 25 at the least, 20-30 minutes, and the cycle will return, at the very least, 2-4 times. 5. Sποsοb ποπ.Ι.χaρaκτeρizuyuschiysya τem, chτο in κachesτve κρemniysοdeρzhaschegο sοedineniya vvοdyaτ κρisτallichesκy κρemny, and κachesτve πρisadκi - shlaκ zο aluminum προizvοdsτva and egο sπlavοv in κοlichesτve 3-50% οτ ρasπlava πρi weight of 850-1000 ° C. The method of process 1, which is characterized by the fact that the supply of the alloy is ensured by the introduction of aluminum oxide, modification of aluminum oxide or boehmite in 35 in quantities of 0, 1 - 0.3% of the mass of the alloy. 7. The method is described in paragraph 1, which is characterized by the fact that the alloy is introduced into the alloy in the amount of 0.05-0.45% of the mass and the earth, which does not cause the loss of property. LISΤ ΒЗΑΜΕΗ ЫЗЯΤΟГΟ (ПИЛΟ 26)