Refining agent for novel aluminum-magnesium-silicon alloy and preparation method of refining agent

Abstract

The invention discloses a refining agent for a novel aluminum-magnesium-silicon alloy and a preparation method of the refining agent, and the refining agent comprises the following raw materials in parts by weight: 10-20 parts of sodium nitrate NaNO3, 5-10 parts of sodium carbonate Na2CO3, 20-30 parts of sodium chloride NaCl, 10-20 parts of magnesium chloride MgCl2, 10-20 parts of aluminum nitrate Al (NO3) 3, 5-10 parts of cryolite Na3AlF6, 10-20 parts of sodium fluoride NaF, 10-20 parts of sodium fluosilicate Na2SiF6 and the balance of graphite C. The method comprises the following steps: performing low-temperature ionization treatment on NaNO3, Na2CO3, NaCl, MgCl2 and Al (NO3) 3 in a certain weight fraction to obtain a dry raw material, crushing the dry raw material, Na3AlF6, NaF and Na2SiF6 to obtain a crushed mixture, sieving, selecting, adding graphite and part of water, continuing stirring to obtain a mixture, and granulating to obtain the refining agent. According to the refining agent for the novel aluminum-magnesium-silicon alloy and the preparation method of the refining agent, the prepared refining agent is granulated and formed, the refining agent can rapidly react with molten aluminum, the reaction process is not affected, the density of a single refining agent particle is enough for continuous reaction, and continuous reaction is guaranteed.

Description

technical field [0001] The invention relates to the technical field of metal smelting and processing, in particular to a refining agent for a novel aluminum-magnesium-silicon alloy and a preparation method thereof. Background technique [0002] The refining agent is a white powder or granular flux, which is prepared by mixing various inorganic salts in a certain proportion after drying treatment. It is mainly used to remove hydrogen and floating oxidized slag in the molten aluminum. Remove the hydrogen and floating oxidation slag inclusions in the molten aluminum, make the molten aluminum more pure, and also act as a slag cleaning agent. [0003] The traditional aluminum alloy refining agent is white powder or granular flux. It is prepared by mixing various inorganic salts in a certain proportion after drying. 2 and CO 2 Gas, refining agent is the use of the main component NaNO 3 , graphite does not undergo chemical reaction, but its own heat energy generates gas N that ...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a refining agent for a new type of aluminum-magnesium-silicon alloy and its preparation method, which has the advantage of fast melting after being put into molten aluminum, and solves the problem of a slow reaction process