Method for recovering magnesium alloy low-level waste

Abstract

The invention relates to a method for recovering magnesium alloy low-level waste, aiming at the actual situation that the magnesium alloy low-level wastes are multiple in varieties, large in quantity, serious in pollution and difficult to recover. A magnesium alloy low-level waste ingot is prepared by mechanical cutting, repeated acid-washing, water washing, smelting in a resistance furnace, refining and casting into ingot; and the magnesium alloy low-level waste ingot has the chemical composition close to the composition quantity value index of a magnesium alloy ingot, and the mechanical property close to the quantity value of the magnesium alloy ingot, so as to be made into industrial part again. The recovery smelting and refining method is advanced, reasonable, short in process flow, low in environmental pollution, easy to recover, high in yield reaching up to 94.5%, good in material purity, and stable in metallographic structure and chemical composition, thus being an ideal method for recovering, smelting and refining the magnesium alloy low-level waste.

Description

technical field [0001] The invention relates to a method for recycling low-grade magnesium alloy waste, which belongs to the technical field of recycling non-ferrous metal waste. Background technique [0002] With the development of industrial technology, due to the characteristics of light weight and high specific strength of magnesium alloys, magnesium and magnesium alloys have been widely used, such as aerospace industry, electronics industry, transportation industry and civil industrial products. [0003] In the waste of magnesium and magnesium alloys, it is divided into clean waste and low-level waste. Clean waste includes processing scraps of mechanical parts, processing waste, waste castings, waste thin-walled parts, waste cake-shaped parts, etc. These wastes and unused The chemical composition of the magnesium alloy material is basically the same, it has not been polluted, but its shape has been changed, and it is relatively easy to recycle; but the chemical composit...

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Problems solved by technology

[0003] In the waste of magnesium and magnesium alloys, it is divided into clean waste and low-level waste. Clean waste includes processing scraps of mechanical parts, processing waste, waste castings, waste thin-walled parts, waste cake-shaped parts, etc. These wastes and unused The chemical composition of the magnesium alloy material is basically the same, it has not been polluted, but its shape has been changed, and it is relatively easy to recycle; but the chemical composition of low-grade waste has changed, such as the cylinder block of an automobile engine and the cylinder block of an aircraft engine. Types of pollution, such as die castings in electronic products, are subject to current radiation pollution, such as machine parts, etc. are subject to oil pollution, as well as acid, alkali, and salt corrosion. These wastes corroded by polluted components, chemical composition It is complex, and many technical difficulties have been encountered in recycling, but these wastes have many varieties, large quantities, and rich sources. If they are not recycled, they will cause more serious environmental pollution.

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