Secondary smelting method for producing magnesium-zirconium intermediate alloy

Abstract

The invention discloses a secondary smelting method for producing a magnesium-zirconium intermediate alloy, which comprises the following steps of: adding 100 to 200 kg of potassium chloride into a pot, raising the temperature to between 880 and 910 DEG C in 25 to 35 minutes, and performing slagging-off; adding 60 to 195 kg of potassium fluozirconate with stirring by using a mechanical nickel rod, wherein the adding time is 10 to 30 minutes; when the furnace temperature reaches the temperature of between 880 and 910 DEG C, performing slagging-off again, and adding magnesium, wherein the addition of the magnesium is based on the weight ratio of K2ZrF6 to Mg of 1.2-1.5:1; after the magnesium is completely dissolved, spreading a protective flux, and stirring for 10 to 20 minutes by using the mechanical nickel rod, standing for 4 to 10 hours, cooling to normal temperature, and brewing by using vapor and cold water; and removing and washing the slag on the alloy, performing remelting refining and slagging-off at the temperature of between 680 and 700 DEG C, and finally ingoting and testing to obtain the finished product. The secondary smelting method for producing the magnesium-zirconium intermediate alloy has the advantages of simple operation, no environmental pollution, low content of impurities in the product, a few flux impurities, high effective content of zirconium and magnesium, fine components, high uniformity, and stable performance.

Description

technical field [0001] The invention relates to a production method of a magnesium-zirconium master alloy. Background technique [0002] Magnesium-zirconium alloy has very good mechanical properties and physical properties, and is widely used in aviation industry and other sectors. Magnesium is the main raw material for the production of magnesium-zirconium alloys. Magnesium is chemically active, especially in the molten state. It can quickly oxidize with oxygen, hydrogen, chlorine, sulfur and any form, and will oxidize and burn rapidly when the surface of the melt is not protected. Therefore, the melt needs to be protected with a protective flux during the entire melting and casting process to avoid The melt is contacted with oxygen, hydrogen and furnace gases. Even so, there are a large number of non-metallic inclusions mixed in, such as Mgo, a small amount of carbon, chlorine and sulfide. Although the content of these inclusions is small compared with the alloy, it br...

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Problems solved by technology

[0004] "Hunan Nonferrous Metals" magazine published the article "Research on High Zirconium Magnesium-Zirconium Master Alloy Technology" in Volume 19, No. 4, 2003. The article mentioned a method of producing magnesium-zirconium master alloy by reducing potassium zirconium fluoride. Although the content of zirconium in the alloy can be stabilized to more than 30%, the impurity content of the alloy is still high, and its product quality is as low as figure 1 shown

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