Externally heating type rotating vacuum furnace used for producing anisotropic cohesive neodymium iron boron magnetic powder
An anisotropic, NdFeB technology is applied in the field of externally heated rotary vacuum furnaces, which can solve the problem that externally heated rotary vacuum furnaces cannot be prepared by anisotropically bonded NdFeB magnetic powders.
Active Publication Date: 2009-06-24
董中天
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Problems solved by technology
[0006] The present invention aims at the problem that the existing externally heated rotary vacuum furnace cannot realize precise temperature control in the furnace body, and thus the externally heated rotary vacuum furnace cannot be used for the preparation of anisotropic bonded NdFeB magnetic powder, and provides a method for preparing various Externally heated rotary vacuum furnace for anisotropically bonded NdFeB magnetic powder
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[0011] An externally heated rotary vacuum furnace for preparing anisotropic bonded NdFeB magnetic powder, including a supported, driven and rotatable furnace body 1 and an electric heating body 9 outside the furnace body that is movable relative to the furnace body. The body 9 is composed of two parts that can be opened and closed by driving, and also includes an electric control device 16. Thermocouples 14, 15 are respectively arranged on the furnace body and the electric heating body, and the output terminals of the thermocouples 14, 15 are connected with the electric control device. connected. Furnace body 1 is rotatably supported by bearings 3 and 4 at both ends. Bearings 3 and 4 are respectively fixed on bearing seats 5 and 6. There is a furnace door 2 that can be opened and closed at the front end of the furnace body. Transmission wheel 7 realizes the rotary drive to body of furnace by transmission wheel 7, transmission belt, speed reducer 8. The electric heating body 9...
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The invention relates to equipment for preparing NdFeB magnetic powder, in particular to an externally heated rotary vacuum furnace for preparing anisotropic bonded NdFeB magnetic powder. The invention solves the problem that the existing externally heated rotary vacuum furnace cannot accurately control the temperature in the furnace body, and thus the externally heated rotary vacuum furnace cannot be used for the preparation of anisotropic bonded NdFeB magnetic powder. The vacuum furnace includes a supported, driven and rotatable furnace body and an electric heating body outside the furnace body that is movable relative to the furnace body. The electric heating body is composed of two parts that can be opened and closed by driving, and can also be made into a single The removable type also includes an electric control device, and thermocouples are respectively arranged on the furnace body and the electric heating body, and the output terminals of the thermocouples are connected with the electric control device. In the present invention, temperature sensing components—thermocouples are arranged on the furnace body and the electric heating body at the same time, so that the temperature in the furnace body can be precisely controlled, and it can be used to prepare anisotropic bonded NdFeB magnetic powder.
Description
technical field [0001] The invention relates to equipment for preparing NdFeB magnetic powder, especially anisotropically bonded NdFeB magnetic powder, in particular an external heating rotary vacuum furnace for preparing anisotropically bonded NdFeB magnetic powder. Background technique [0002] Bonded NdFeB is a magnetic material bonded with NdFeB magnetic powder by compression molding or injection molding. According to the different properties of bonded NdFeB magnetic powder, it can be divided into isotropic bonded NdFeB and anisotropic bonded NdFeB. Isotropic bonded NdFeB technology is relatively simple but the magnetic energy product is relatively low. The maximum magnetic energy product of anisotropic bonded NdFeB can theoretically be three times larger than that of isotropic bonded NdFeB. The formation of anisotropic bonded NdFeB magnetic powder from NdFeB alloy needs to go through a series of complex physical and chemical processes such as hydrogen absorption, dispr...
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IPC IPC(8): F27B7/06F27B7/08F27B7/42
Inventor 董中天王宇
Owner 董中天