阅读说明：本技术 一种高硅铝硅中间合金锭的制备方法 (Preparation method of high-silicon aluminum silicon intermediate alloy ingot ) 是由 刘新锋 李坤 袁志刚 赵文龙 吴慕天 赵蕾 邵四杰 李海峰 李晓庆 于 2020-04-20 设计创作，主要内容包括：本发明公开了一种高硅铝硅中间合金锭的制备方法,采用铝含量99.70%以上的电解铝液和铝锭、硅含量99.37%以上的3303金属硅为原料,铝锭和电解铝液的重量份之比为1：10,金属硅与纯铝的质量比为1.51/1,得到AlSi60中间合金；熔炼过程通过喷粉精炼机进行精炼处理得到高硅铝硅中间合金,以纯度为99.999%以上的氮气或氩气为载体,将打渣剂和精炼剂均匀喷入熔体中,进行精炼除渣。本发明制备得到的高硅铝硅中间合金锭,成分稳定均匀、内部组织致密、表面光滑清洁、无杂质,铸造速率大幅度提高,节省了生产空间,降低了人员劳动力的浪费,能耗大幅度降低,满足了生产企业的需求,安全性高,易于推广,是生产AlSi60中间合金锭的最佳生产方法。(The invention discloses a preparation method of a high-silicon aluminum silicon intermediate alloy ingot, which adopts electrolytic aluminum liquid with the aluminum content of more than 99.70 percent and the aluminum ingot as well as 3303 metal silicon with the silicon content of more than 99.37 percent as raw materials, wherein the weight ratio of the aluminum ingot to the electrolytic aluminum liquid is 1: 10, the mass ratio of the metallic silicon to the pure aluminum is 1.51/1, and the AlSi60 intermediate alloy is obtained; and in the smelting process, a powder injection refiner is used for refining to obtain the high-silicon aluminum silicon intermediate alloy, nitrogen or argon with the purity of over 99.999 percent is used as a carrier, and a slag-removing agent and a refining agent are uniformly sprayed into the melt for refining and deslagging. The high-silicon aluminum silicon intermediate alloy ingot prepared by the invention has stable and uniform components, compact internal structure, smooth and clean surface, no impurities, greatly improved casting speed, saved production space, reduced labor waste of personnel, greatly reduced energy consumption, high safety and easy popularization, and is the best production method for producing the AlSi60 intermediate alloy ingot.)

1. A preparation method of a high-silicon aluminum silicon intermediate alloy ingot is characterized by comprising the steps of taking an electrolytic aluminum liquid with the mass grade of A L99.70 being more than 99.70%, an aluminum ingot and 3303 metal silicon with the silicon content being more than 99.37% as raw materials, enabling the weight ratio of the aluminum ingot to the electrolytic aluminum liquid to be 1: 10, enabling the mass ratio of the metal silicon to pure aluminum to be 1.51/1, obtaining an AlSi60 intermediate alloy, and carrying out refining treatment in a smelting process through a powder spraying refiner to obtain the high-silicon aluminum silicon intermediate alloy, wherein nitrogen or argon with the purity being more than 99.999% is used as a carrier, a slag-removing agent and a refining agent are uniformly sprayed into a melt, refining and deslagging are carried out, the flow of the nitrogen or the argon is 6-12N L/min, and the gas pressure is 0.1-0.3 Mpa.

2. The method for producing a high silicon aluminum silicon master alloy ingot according to claim 1, characterized in that: the smelting equipment adopts a medium-frequency induction furnace, the metal silicon is added in 3-6 batches in a mode of adding the metal silicon, the metal silicon is heated and heated until the metal silicon is completely melted, and the metal silicon is introduced into a casting machine for production.

3. The method for producing a high silicon aluminum silicon intermediate alloy ingot according to claim 1 or 2, comprising the specific production steps of:

A. preparing raw materials, namely adopting electrolytic aluminum liquid and aluminum ingot with the mass grade of A L99.70.70% or more and 3303 metallic silicon with the silicon content of 99.37% or more as raw materials, wherein the weight ratio of the aluminum ingot to the electrolytic aluminum liquid is 1: 10, the mass ratio of the metallic silicon to pure aluminum is 1.51/1, and the pure aluminum comprises the aluminum ingot and aluminum elements in the electrolytic aluminum liquid;

B. heating the prepared electrolytic aluminum liquid with the A L99.70 content of more than 99.70% in a medium-frequency induction furnace to 760-780 ℃, and scattering a proper amount of a slag-removing agent for removing slag;

C. after deslagging, adding prepared 3303 metal silicon with the silicon content of more than 99.37 percent into 3-6 batches, and heating until the metal silicon is completely melted to obtain an aluminum melt;

D. after the silicon is added, controlling the temperature of the aluminum melt at 900-950 ℃ and carrying out heat preservation alloying for 20 minutes;

E. adding prepared aluminum ingots with the A L content of more than 99.70% for cooling, cooling to 840 ℃, using a powder injection refiner, taking nitrogen or argon with the purity of more than 99.999% as a carrier, and uniformly spraying a proper amount of refining agent into the aluminum melt for refining and deslagging for 5-20 minutes, wherein the flow of the nitrogen or argon is 6-12N L/min, and the gas pressure is 0.1-0.3 Mpa;

F. and after refining, continuously stirring and heating to 900-950 ℃, sampling, and after the test is qualified, carrying out ingot casting by using a casting machine to obtain a high-silicon aluminum silicon intermediate alloy ingot, namely an A L Si60 intermediate alloy ingot.

4. The method for producing a high silicon aluminum silicon master alloy ingot according to claim 3, characterized in that: in the step B, the adding amount of the electrolytic aluminum liquid is 50-60% of the capacity of the medium-frequency induction furnace; the addition amount of the slag removing agent is 1-2 per mill of the weight of the electrolytic aluminum liquid.

5. The method for producing a high silicon aluminum silicon master alloy ingot according to claim 3, characterized in that: in the step A, the amount of the refining agent is 1-2 per mill of the weight of the aluminum melt.

The technical field is as follows:

the invention relates to the technical field of preparation of aluminum-silicon intermediate alloys, in particular to a preparation method of a high-silicon aluminum-silicon intermediate alloy ingot.

Secondly, background art:

at present, the chemical components of the aluminum intermediate alloy in China execute a new standard of GB/T27677 & 2017 aluminum intermediate alloy, the standard of GB/T27677 & 2011 aluminum intermediate alloy is replaced, and an A L Si60 intermediate alloy ingot is newly added, wherein the silicon content of the specified aluminum-silicon intermediate alloy is 57-63%, the content of main impurity elements is required to be as follows, Fe is less than or equal to 0.50%, Ti is less than or equal to 0.10%, Ca is less than or equal to 0.10%, other single aluminum is less than or equal to 0.05%, and the sum of the other elements is less than or equal to 0.15%.

The published production method of CN102864350A adopts high-silicon aluminum alloy and pure aluminum to be mixed according to a certain proportion, adopts A L Si25 high-silicon aluminum alloy and A L99.70 more than 99.70 percent pure aluminum as raw materials, can produce A L Si18, A L Si20 and A L Si22, but can not produce A L Si60 according to the method.

The published CN105543517 aluminum-silicon intermediate alloy preparation method is characterized in that aluminum foil with the thickness of 0.2mm is adopted to wrap industrial silicon particles with the particle size of 1-80 mm, the industrial silicon particles are placed at the bottom of a smelting furnace, then more than A L99.70.70% of aluminum ingots are added into a hearth of the smelting furnace according to the proportion of the aluminum-silicon alloy, the aluminum ingots are placed on the industrial silicon particles wrapped by the aluminum foil, heating, smelting and casting forming are carried out after stirring, and fracture tissues of the finally produced high-silicon aluminum-silicon intermediate alloy have partial unmelted objects which cannot meet the requirement

The standard requirement of GB/T27677-2017 aluminum master alloy.

Thirdly, the invention content:

the technical problem to be solved by the invention is as follows: the preparation method of the high-silicon aluminum silicon intermediate alloy ingot is provided to achieve the purposes of ensuring that silicon simple substance is fused into aluminum alloy, reducing energy consumption, improving production efficiency and refining aluminum silicon intermediate alloy crystal grains.

The technical scheme adopted by the invention for solving the technical problem is as follows:

a preparation method of a high silicon aluminum silicon intermediate alloy ingot adopts electrolytic aluminum liquid with a mass grade of A L99.70.70% or more, an aluminum ingot and 3303 metal silicon with a silicon content of 99.37% or more as raw materials, the weight ratio of the aluminum ingot to the electrolytic aluminum liquid is 1: 10, the mass ratio of the metal silicon to pure aluminum is 1.51/1, an AlSi60 intermediate alloy is obtained, a powder spraying refiner is used for refining in a smelting process, the high silicon aluminum silicon intermediate alloy is obtained, wherein nitrogen or argon with a purity of 99.999% or more is used as a carrier, a slag-removing agent and a refining agent are uniformly sprayed into a melt for refining, slag is removed, the flow of the nitrogen or argon is 6-12N L/min, and the gas pressure is 0.1-0.3 Mpa.

The smelting equipment adopts a medium-frequency induction furnace, the metal silicon is added in 3-6 batches in a mode of adding the metal silicon, the metal silicon is heated and heated until the metal silicon is completely melted, and the metal silicon is introduced into a casting machine for production.

The preparation method of the high-silicon aluminum silicon intermediate alloy ingot comprises the following specific production steps:

A. preparing raw materials, namely adopting electrolytic aluminum liquid and aluminum ingot with the mass grade of A L99.70.70% or more and 3303 metallic silicon with the silicon content of 99.37% or more as raw materials, wherein the weight ratio of the aluminum ingot to the electrolytic aluminum liquid is 1: 10, the mass ratio of the metallic silicon to pure aluminum is 1.51/1, and the pure aluminum comprises the aluminum ingot and aluminum elements in the electrolytic aluminum liquid;

B. heating the prepared electrolytic aluminum liquid with the A L99.70 content of more than 99.70% in a medium-frequency induction furnace to 760-780 ℃, and scattering a proper amount of a slag-removing agent for removing slag;

C. after deslagging, adding prepared 3303 metal silicon with the silicon content of more than 99.37 percent into 3-6 batches, and heating until the metal silicon is completely melted to obtain an aluminum melt;

D. after the silicon is added, controlling the temperature of the aluminum melt at 900-950 ℃ and carrying out heat preservation alloying for 20 minutes;

E. adding prepared aluminum ingots with the A L content of more than 99.70% for cooling, cooling to 840 ℃, using a powder injection refiner, taking nitrogen or argon with the purity of more than 99.999% as a carrier, and uniformly spraying a proper amount of refining agent into the aluminum melt for refining and deslagging for 5-20 minutes, wherein the flow of the nitrogen or argon is 6-12N L/min, and the gas pressure is 0.1-0.3 Mpa;

F. and after refining, continuously stirring and heating to 900-950 ℃, sampling, and after the test is qualified, carrying out ingot casting by using a casting machine to obtain a high-silicon aluminum silicon intermediate alloy ingot, namely an A L Si60 intermediate alloy ingot.

In the step B, the adding amount of the electrolytic aluminum liquid is 50-60% of the capacity of the medium-frequency induction furnace; the addition amount of the slag removing agent is 1-2 per mill of the weight of the electrolytic aluminum liquid.

In the step A, the amount of the refining agent is 1-2 per mill of the weight of the aluminum melt.

The high-silicon aluminum silicon intermediate alloy ingot obtained by the preparation method disclosed by the invention has the advantages that the silicon content is 59-61%, the iron content is 0.30-0.35%, the contents of copper, manganese, magnesium, chromium, titanium and calcium are all less than 0.05%, the sum of other single materials is less than 0.15%, the fracture structure is free of segregation and unmelted objects, and the standard requirements of GB/T27677-2017 aluminum intermediate alloy are met.

Fourthly, the specific implementation mode:

the technical solutions of the present invention will be further described in detail and clearly in the following with reference to specific examples, but the scope of the present invention is not limited thereto.