Smelting process for aluminum-silicon master alloy

Abstract

The invention relates to a smelting process for an aluminum-silicon master alloy. 75 percent of industrial pure aluminum ingot with the aluminum content being more than or equal to 99.7 percent and 12.5 to 13 percent of 6063 aluminum remelted regenerable ingot, which are measured according to a weight percent, are added into a reverberatory furnace at the temperature of 1000 to 1200 DEG C, 12 to 12.5 percent of well-measured pure silicon is added into the reverberatory furnace after the ingot is completely smelted to generate aluminum-silicon master alloy melt, and the aluminum-silicon master alloy melt is made into the aluminum-silicon master alloy through a smelting technique, a casting technique and a sawing technique. On the premise of not increasing equipment investment, the existing aluminum alloy smelting reverberatory furnace with an environment-friendly device system, a deep well and a casting system capable of continuously casting multiple cylindrical ingots at a time are used for smelting and casting the aluminum-silicon master alloy cylindrical ingot so as to substitute a traditional outdated production technique of the aluminum-silicon master alloy adopting a small-sized ground furnace to smelt and adopting a manual pouring way and an automatic cooling way of ingot molds, so that the energy can be saved, the environment can be protected, the production efficiency can be greatly improved, the labor intensity can be alleviated, the balance of silicon content in the aluminum-silicon master alloy and adequate chemical combination of aluminum and silicon as well as refining of the crystal grains can be better guaranteed, and the transformation, upgrading and development of enterprises can be promoted.

Description

technical field [0001] The invention belongs to the technical field of smelting and casting of aluminum alloy materials, in particular to a smelting process of an aluminum-silicon intermediate alloy. Background technique [0002] Industrial pure silicon has a high melting point, and it is not easy to combine directly into the smelted aluminum alloy. It is generally added in the form of an intermediate alloy. However, the traditional melting and production methods of aluminum-silicon intermediate alloys mostly use small-scale furnace multi-furnace smelting and manual pouring. Ingot mold self-cooling production, this method has many defects: low production efficiency, uneven silicon content in each batch, resulting in multiple inspections and addition of aluminum-silicon intermediate alloys in the process of aluminum alloy smelting and batching, and the incompatibility of silicon and aluminum Completely, due to the high smelting temperature and the high labor intensity of work...

AI Technical Summary

Problems solved by technology

[0002] Industrial pure silicon has a high melting point, and it is not easy to combine directly into the smelted aluminum alloy. It is generally added in the form of an intermediate alloy. However, the traditional melting and production methods of aluminum-silicon intermediate alloys mostly use small-scale furnace multi-furnace smelting and manual pouring. Ingot mold self-cooling production, this method has many defects: low production efficiency, uneven silicon content in each batch, resulting in multiple inspections and addition of aluminum-silicon intermediate alloys in the process of aluminum alloy smelting and batching, and the incompatibility of silicon and aluminum Completely, due to high smelting temperature, high labor intensity of workers, slag removal and incomplete degassing during smelting and casting, silicon oxide (silicon skin) is difficult to remove

A series of aluminum alloy cylindrical ingots that are melted and cast with this aluminum-silicon master alloy, the surface of the aluminum profile produced by heating and extrusion is prone to entrainment of black spots, resulting in defects such as strain and roughness on the surface of the aluminum profile