Automobile part die-casting aluminum alloy smelting process

Abstract

The invention discloses an automobile part die-casting aluminum alloy smelting process, and belongs to the field of aluminum alloy smelting. The automobile part die-casting aluminum alloy smelting process comprises the following steps that S1, firstly, an aluminum alloy ingot is crushed into small blocks, then the small blocks are put into a smelting furnace, the smelting furnace is preheated to dry moisture, and then a furnace cover is closed and air in the smelting furnace is pumped out. According to the scheme, high temperature of smelting is utilized to enable gas to be heated and expanded so as to enable a smelting assisting disc to be broken, both zinc chloride and chlorine can be subjected to chemical reaction in the furnace to generate gaseous aluminum chloride, impurities, gas and the like are adsorbed together to float upwards in the floating process, and the purification effect is effectively improved; aluminum alloy and manganese chloride react to generate the aluminum chloride, the purification effect is deepened, nitrogen is released through consumption of the manganese chloride, the nitrogen forms bubbles to take away aluminum oxide and hydrogen, the deslagging and degassing effects are further improved, and in the upward floating process of the broken smelting assisting disc, a catcher can take away suspended aluminum oxide to a liquid level so as to improve the deslagging rate.

Description

technical field [0001] The invention relates to the field of aluminum alloy smelting, and more specifically relates to a process for smelting aluminum alloys for die-casting of auto parts. Background technique [0002] Smelting is a process in which metal materials and other auxiliary materials are put into a heating furnace to be melted and tempered. The material in the furnace undergoes certain physical and chemical changes at high temperature (1300-1600K), and crude metal or metal enrichment and slag are produced. metallurgical process. In addition to concentrate, calcined sand, sintered ore, etc., sometimes it is necessary to add a flux to make the charge easy to melt, and to add a reducing agent for a certain reaction. In addition, in order to provide the necessary temperature, it is often necessary to add fuel to burn and send in air or oxygen-enriched air. Coarse metals or metal enrichments are separated into two layers due to low mutual solubility with molten slag ...

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Problems solved by technology

[0004] The aluminum alloy used to make auto parts will also produce furnace slag due to the inclusion of moisture and air during the smelting process. In the existing smelting process, slag removal and hydrogen removal are mainly carried out by adding slag remover and introducing gas. However, since the specific gravity of alumina is very close to that of aluminum alloy, it will not automatically float to the liquid surface when it remains in the aluminum liquid, so the treatment effect is not very good, and the equipment and operation used are also complicated, which increases the production cost

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