A certain amount of tungsten is added into tantalum to form the tantalum tungsten binary alloy, which has both the corrosion resistance of tantalum and the good high temperature strength of tungsten. This alloy has the advantages of high temperature resistance, high strength, good fracture toughness, corrosion resistance and so on, and has been widely used in aviation, aerospace, chemical industry, nuclear industry, high temperature technology and other fields. In the traditional process of producing tantalum 2.5 tungsten alloy ingot (hereinafter referred to as Ta-2.5W), hydrometallurgical purification and recovery process is adopted, as shown in Figure 1. The finished ingot billet is obtained through full mixing and multiple melting of tantalum powder and tungsten powder. However the tantalum 2.5 in the preparation of tungsten alloy ingot casting, due to the recovery for the purification of hydrometallurgy process route, need to go through wet decomposition, extraction, crystallization, sodium reduction, hydraulic molding, vacuum sintering, electron beam melting process, operation process and complex, so we need a large amount of investment of equipment, and recovery of tantalum and tungsten composite yield is low. At the same time, in the process of wet decomposition, it needs to consume a large amount of mixed acid, resulting in a large amount of waste water and waste gas containing acid, thus causing environmental pollution.
A kind of tantalum and tantalum recycling tungsten material preparation of tantalum 2.5 tungsten alloy ingot casting method, in order to solve the traditional process of the adoption of tantalum and tantalum recycling tungsten acid decomposition, metal reduction purification production of tantalum powder, tantalum 2.5 using tantalum powder and tungsten powder production method of the tungsten alloy ingot process complex, process is various, tantalum, and tungsten metal yield is low, the production process of environmental pollution problems such as big. The technical solution adopted in this application is as follows: a method for preparing tantalum and tantalum tungsten recovery materials for tantalum 2.5 tungsten alloy ingots, including the following steps: S1: Pickling different forms of tantalum, tantalum 2.5 tungsten alloy or tantalum 10 tungsten alloy recovery materials with mixed acid.
