Research and development method of aluminum colored intermediate alloy

The research and development methods of nonferrous aluminum intermediate alloys mainly include mixing method, ‌ electrolysis method, ‌ thermit reduction method, ‌ molten salt electrolysis method, ‌ vacuum thermit reduction method, ‌ and the reduction of oxides with aluminum in specific molten salt systems. ‌

The mixing process, ‌ also known as the admixture process, ‌ involves the proportional addition of rare earth or mixed rare earth metals to high-temperature aluminum liquid, ‌ directly to produce intermediate alloys. ‌ This method has the advantages of simple equipment, ‌ convenient operation, ‌ fast melting speed, ‌ convenient addition of alloy elements and ‌ stable content of alloy components. ‌, however, its disadvantages include rare earth metals are easy to be locally too concentrated in liquid aluminum, ‌ peritectic reaction is easy to occur, ‌ produces inclusions, ‌ rare earth burning loss, ‌ high cost. ‌

There are two main methods of electrolysis: ‌ One is to produce a series of rare earth aluminum alloys by electrolysis of rare earth chloride on liquid aluminum cathode at low temperature; ‌ Second, when electrolyzing aluminum, ‌ adds rare earth oxides or rare earth salts to the industrial aluminum electrolytic cell, ‌ makes the added rare earth oxides or rare earth salts electrolysis together with alumina, ‌ is the rare earth and aluminum co-electric deposition to produce rare earth aluminum alloy. ‌

Thermite reduction method uses the reducing ability of aluminum, ‌ aluminum can form a variety of intermetallic compounds with rare earth, ‌ the use of aluminum as reducing agent to prepare rare earth aluminum alloy. ‌ This method is carried out at a lower temperature ‌ avoids the problems caused by high temperature. ‌

Molten salt electrolysis involves electrolysis of AlSc intermediate alloys in a specific molten salt system ‌, but this method faces the problem of fluorine salt corrosion. ‌

Vacuum thermite reduction and reduction of oxides with aluminum in specific molten salt systems, ‌ these methods are used to prepare aluminum intermediate alloys containing specific elements, ‌ by controlling reaction conditions and subsequent treatment to obtain the desired alloy properties. ‌

The development and application of these methods, ‌ not only involves the innovation of alloy preparation technology, ‌ also includes the optimization of alloy properties and the consideration of environmental impact, ‌ to meet the needs of nonferrous aluminum intermediate alloys in different fields. ‌