Multiple-effect composite refining flux for removing impurities in aluminum and aluminum alloy melt and application

Abstract

The invention discloses a multiple-effect composite refining flux for removing impurities in aluminum and aluminum alloy melt. Raw materials of the multiple-effect composite refining flux comprise, by weight, 50%-70% of aluminum fluoride AlF3, 15%-25% of magnesium chloride MgCl2, 2%-10% of sodium borate Na2B4O7 and 1%-15% of potassium chloride KCl2. All the raw materials are dried industrial grade powder products, and the purities of all the raw materials reach 99.5% or above. After the matched raw materials are added into a ball mill for ball milling for 10-15 min, the raw materials are screened through a screen with the meshes being 100-325, and the powder mixture grain size distribution requirements are that 35%-50% of powder with the grain size being 90-125 [mu]m, 20%-25% of powder with the grain size being 60-90 [mu]m, 8%-10% of powder with the grain size being 40-60 [mu]m, and 35%-50% of powder with the grain size being smaller than or equal to 40 [mu]m. The prepared flux is packaged in a sealed mode for standby application after inspection. The multiple-effect composite refining flux provided by the invention has the good capacity for removing the metal impurities and oxide inclusion, the problem that metal impurities in the aluminum and aluminum alloy melt are over standard is solved, and the flux has the better impurity and slag inclusion removing capacity, and has the multiple effects and the multiple purposes.

Description

Technical field: [0001] The invention relates to a method for removing impurities in aluminum and aluminum alloy melts, in particular to a multi-effect composite refining flux that uses fluoride, chloride and boride compositions to remove impurities in the melt, and the multi-effect The preparation and use method of the compound refining flux, the multi-effect compound refining flux is suitable for the method of treating molten aluminum with inert gas as the carrier of blow injection and rotary injection. Background technique: [0002] Aluminum alloy has the advantages of light weight, high specific strength, easy formability and good electromagnetic shielding performance. In recent years, it has become an important high-end lightweight material in the transportation and electronics industries. The chemical properties of aluminum are lively, but the primary aluminum and aluminum alloys often contain a large amount of oxides and impurity elements such as Fe, Si, Na, Ga, Li, V...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the existing aluminum and aluminum alloy refining fluxes, propose a multi-effect compound refining flux that can efficiently remove inclusions and harmful metal elements in the aluminum melt at the same time, and provide the multi-effect compound refining flux The invention discloses a method for preparing and using a multi-effect compound refining flux. The multi-effect compound refining flux has a strong ability to capture metal impurities and inclusions in the aluminum melt and quickly float up, and has a large density difference with the aluminum melt, which can effectively To prevent the flux from being mixed in the aluminum melt as a flux inclusion