Aluminum melt contains a large number of trace elements, which have certain negative impacts on the properties of aluminum alloys. To minimize the content of these elements, the new alkali metal extraction medium-frequency furnace developed by Luoyang Wanle Electric Power Equipment Factory can achieve the following effects. Attachments 1-6 are the testing reports of aluminum alloy element content, which are provided by the Heavy Metal Processing Material Quality Inspection Station of China Nonferrous Metals Industry.

Annex 1

Appendix 2

Appendix 3

Annex 4

Annex 5

Appendix 6

The controllable melt flow of the medium-frequency electric furnace produced by Luoyang Wanle Electric Power Equipment Factory is as follows:

Special Power Supply Structure

Full power output can be achieved with 1/3 charge, 2/2 charge and full-capacity charge. It enables flexible production without increasing power consumption cost while effectively reducing equipment investment, and keeps the power factor always above 0.97; the power output accuracy is controlled within 1%. It can still precisely control power output when the furnace is not fully charged, ensuring process control accuracy under various conditions; it automatically adapts to the charge capacity without requiring any modification to any part of the equipment. It is easy to operate and effectively improves production efficiency.

Various flow patterns of melt:

By controlling the flow direction of the melt in the medium-frequency furnace, we achieve homogeneous and dispersed distribution of alloy components, effectively improve the properties of the as-cast material, greatly reduce the pressure of subsequent heat treatment on the material, and cut down energy consumption and production costs.

Effects of Different Melt Flow Directions on As-Cast Microstructure of Materials

This equipment adopts a grouped output mode to control the direction and intensity of liquid flow in the furnace, realizing the composition homogenization of complex alloys. Its homogenization effect is particularly prominent for the non-ferrous metal industry.

Below is the comparison of as-cast microstructure of the same aluminum alloy smelted in an ordinary medium-frequency furnace anda melt flow controllable medium-frequency furnace

This process does not require adding any substances. The furnace has a built-in stirring function. Stirring from the inside out forms a convex liquid surface, and stirring from the outside in forms a concave liquid surface. Only 10 minutes of stirring is required. During the high-temperature stirring process, components such as calcium, sodium, and lithium will be oxidized and volatilized, so as to obtain molten aluminum with higher purity. For the condition of the liquid surface, please refer to the project case video. Three-phase inverter stirring (concave), Three-phase inverter stirring (convex).