High-purity stabilized aluminum alloy ingot and production method thereof

Abstract

The invention discloses high-purity stabilized aluminum alloy ingot which comprises the following components in weight percent: 3.1-3.8% of Cu, 7.9-9.3% of Si, 0-0.1% of Mg, 0-2.3% of Zn, 0-0.9% of Fe, 0-0.5% of Mn, 0-0.5% of Ni, 0-0.35% of Sn, 0-0.1% of Ti, 0-0.25% of other trace elements and the balance of Al. The invention further discloses a production method of the high-purity stabilized aluminum alloy ingot. The high-purity stabilized aluminum alloy ingot of the invention has low gas and slag content, high cleanness of molten aluminum, uniform components of the product and thin crystal structure; and the production method has low production cost and high efficiency, and effectively solves the pollution problem of the secondary aluminum industry.

Description

technical field [0001] The invention relates to an aluminum alloy ingot and a production method thereof, in particular to a high-purity stable aluminum alloy ingot and a production method thereof. Background technique [0002] At present, the aluminum-silicon alloys on the market have high impurity content, serious composition segregation, poor mechanical and processing properties, poor raw material sorting ability, high preparation cost and low efficiency. [0003] In addition, the preparation method adopted by the high-purity stable aluminum alloy ingots currently on the market is to use pure aluminum ingots as the base, add the required alloying elements according to the composition ratio requirements, and smelt the aluminum alloy ingots of the required grades. However, the cost of this preparation method is very high; another preparation method is to use waste aluminum materials to prepare, use recycled waste aluminum parts or scraps and waste aluminum wires in the proce...

AI Technical Summary

Problems solved by technology

[0002] At present, the aluminum-silicon alloys on the market have high impurity content, serious composition segregation, poor mechanical and processing properties, poor raw material sorting ability, high preparation cost and low efficiency.

[0003] In addition, the preparation method adopted by the high-purity stable aluminum alloy ingots currently on the market is to use pure aluminum ingots as the base, add the required alloying elements according to the composition ratio requirements, and smelt the aluminum alloy ingots of the required grades. However, the cost of this preparation method is very high; another preparation method is to use waste aluminum materials to prepare, use recycled waste aluminum parts or scraps and waste aluminum wires in the process of producing aluminum products as the main raw materials, and produce them through smelting and preparation. To produce secondary aluminum ingots that meet the standard requirements, this production method has the following problems:

[0008] At present, the high-temperature smelting method is generally adopted in the industry, and the temperature is controlled at about 800°C during the smelting process. This kind of smelting causes a lot of burning damage to raw materials and consumes a lot of energy; iron rakes are generally used for stirring during the smelting process, and iron rakes will be used for stirring. Increasing the iron content of the aluminum melt will increase the gas and slag content of the melt at the same time; the refining process is immature, and the refining agent is generally sprinkled directly into the furnace, and the degassing and impurity removal effects are not good

At the same time, the pollution control in the production process is not good, which seriously affects the environmental quality

[0009] To sum up, when using waste aluminum to prepare high-purity and stable aluminum alloys, the technical problems faced are: the pretreatment quality of waste aluminum, smelting The control of energy consumption and burning loss in the process, the guarantee of the uniformity of the product composition, the purification quality of the aluminum melt, and the control of the crystallization structure of the product, etc., due to the above technical problems, there are high costs in production, coarse crystallization of the product, and serious composition segregation , high impurity content, unstable performance, serious environmental pollution and other problems