Efficient refining agent for smelting aluminum alloy and preparation method thereof

Abstract

The invention discloses an efficient refining agent for smelting an aluminum alloy. The efficient refining agent is prepared from the following raw materials in parts by weight: 6-8 parts of plant ash, 8-10 parts of bentonite, 3-5 parts of wollastonite in powder, 3.5-5.5 parts of celestite powder, 0.5-2 parts of graphite powder, 3-5 parts of jade powder, 2-4 parts of quartz sand, 8-10 parts of magnesium hydroxide, 8-10 parts of lithium chloride, 6-8 parts of zinc chloride, 3-4 parts of calcium chloride, 2-4 parts of barium chloride, 4-5 parts of potassium fluosilicate, 1-2 parts of potassium tripolyphosphate, 2-3 parts of sodium sulfate, 1-2 parts of sodium metasilicate, 7-8 parts of rare earth carbonate, 0.1-1.0 part of boron oxide, 0.8-1.2 parts of yttrium fluoride and 3-5 parts of cerium oxide. The efficient refining agent can be used for effectively removing nonmetallic inclusions from an aluminum alloy melt and reducing the loss of rare earth elements in the alloy, and has a good degassing effect; and when the efficient refining agent is used for refining, aluminum dross is separated thoroughly, so that the porosity and oxide inclusions in an alloy casting are obviously reduced, and the comprehensive performance of an aluminum alloy profile is improved.

Description

Technical field [0001] The invention relates to the field of metal materials, in particular to a high-efficiency refining agent for aluminum alloy melting and a preparation method thereof. Background technique [0002] In the aluminum alloy casting process, it usually goes through the process steps of feeding-refining-slagging-standing-casting and so on. Covering agent, slag removal, slag cleaning agent, refining agent, etc. are needed in the smelting process. It is used in the traditional aluminum alloy manufacturing process. The refining agent will cause the heat resistance and corrosion resistance of the castings to be weak, and the porosity of the alloy castings produced is relatively high, and there will be more pores on the surface of the castings, and the proportion of oxide impurities is also high, which affects Performance of alloy castings. The quality of aluminum alloy products depends on the gas content and impurity content in the aluminum alloy and the size of the g...

AI Technical Summary

Problems solved by technology

[0002] In the process of aluminum alloy casting, it usually goes through the process steps of feeding-refining-slag removal-standstill-casting. During the smelting process, covering agents, slag breaking, slag cleaning agents, refining agents, etc. are used. The traditional aluminum alloy manufacturing process uses If the refining agent is used, it will lead to poor heat resistance and corrosion resistance of the castings, and the porosity in the produced alloy castings is relatively high, and there will be many pores on the surface of the castings, and the proportion of oxide impurities is also high, which affects Properties of Alloy Castings

The quality of aluminum alloy products lies in the gas content and impurity content in the aluminum alloy and the size of the grain size. The refining process is to remove the gas and iron and other impurities in the aluminum liquid, and to purify the aluminum liquid. Occupying an important position in the production process, refining agents can effectively remove slag inclusions in molten aluminum, and at the same time reduce the hydrogen content of molten aluminum, so the quality of refining agents is very important for the purification effect of molten aluminum, but slag inclusions are common in current refining agents Many problems, large oxidation and burning loss, incomplete separation of aluminum slag, poor degassing and slag removal effect, etc.