A coupling has an opening and a protrusion extending downward from the opening. The protrusion has threads that are preferably positioned outside of the opening. A rotor shaft that connects to the coupling has an internal bore with threads that receives and retains the protrusion, such as by a threaded connection between the two, so the protrusion applies driving force to the shaft.

The present disclosure relates to a method for manufacturing aluminium deox, aluminium powder, and zinc oxide in a single batch process. The method comprises feeding galvalume dross into induction furnace to melt the galvalume dross. The method includes extracting zinc oxide powder, aluminium deox and aluminium powder from the molten galvalume dross.

The invention discloses a method for removing the slag during the remelting of Ni-based superalloy, including: the master Ni-based superalloy is placed in a crucible located in a vacuum induction melting furnace; under the condition of maintaining a predetermined vacuum degree, the furnace cavity is heated to melt the master Ni-based superalloy, during the melting process, the metallic element Ca is thrown into the alloy melt, when the temperature in the furnace cavity rises to a predetermined degree, the master Ni-based superalloy is completely melted, at this time, the slag is formed on the surface of the alloy melt. When the master Ni-based superalloy is completely melted and enters the smelting stage, the metallic elements Ca, Ba, and Sr are put into the alloy melt in turn and the electromagnetic stirring is performed to rapidly remove the slag on the surface of the alloy melt.

Provided is a system to measure the percentage of copper concentrate in the melting stage in-line and in real-time, it consists of at least four (1) electrodes inserted aligned through the refractory wall (2) of a smelting furnace, so that one end of each of the electrodes (1) remains on the outside of the furnace and the other end is inserted in the middle where the reaction occurs; i.e., inserted into the smelting bath, with these electrodes (1) connected to a signal amplifier which in turn is connected to signal generator, in which said power generator sends a replicated signal from the signal generator, sending the current-increased signals for charges with resistances of less than 0.1 ohm, and with bandwidths of 3 MHz, in which the power amplification sends the power signal to the electrodes (1) at the ends of the alignment so that the electrodes (1) that remain in the center receive the resistivity reading once the signal has been sent.

Provided is a system to measure the percentage of copper concentrate in the melting stage in-line and in real-time, it consists of at least four (1) electrodes inserted aligned through the refractory wall (2) of a smelting furnace, so that one end of each of the electrodes (1) remains on the outside of the furnace and the other end is inserted in the middle where the reaction occurs; i.e., inserted into the smelting bath, with these electrodes (1) connected to a signal amplifier which in turn is connected to signal generator, in which said power generator sends a replicated signal from the signal generator, sending the current-increased signals for charges with resistances of less than 0.1 ohm, and with bandwidths of 3 MHz, in which the power amplification sends the power signal to the electrodes (1) at the ends of the alignment so that the electrodes (1) that remain in the center receive the resistivity reading once the signal has been sent.

A coupling has an opening and a protrusion extending downward from the opening. The protrusion has threads that are preferably positioned outside of the opening. A rotor shaft that connects to the coupling has an internal bore with threads that receives and retains the protrusion, such as by a threaded connection between the two, so the protrusion applies driving force to the shaft.

A coupling has an opening and a protrusion extending downward from the opening. The protrusion has threads that are preferably positioned outside of the opening. A rotor shaft that connects to the coupling has an internal bore with threads that receives and retains the protrusion, such as by a threaded connection between the two, so the protrusion applies driving force to the shaft.

A method for collecting a heavy rare earth element from a molten salt electrolysis residue and recycling the heavy rare earth element that includes mixing coarse particles of the molten salt electrolysis residue with a fluorinating material followed by firing to fluorinate the coarse particles, pulverizing the fluorinated coarse particles to obtain a powder, and mixing the powder with R, an R-M alloy, or an R-M-B alloy, where R is a rare earth element selected from Y, La, Ce, Nd, Pr, Sm, Gd, Dy, Tb, and Ho, M is a transition metal such as Fe or Co, and B is boron, heating and melting the mixture, separating a molten alloy from slag, and selectively extracting the heavy rare earth element into the molten alloy. The method can efficiently recycle a heavy rare earth element in an alloy form, useful for recycling a rare earth magnet.