Device for recovering Nd-Fe-B magnetic powder

Abstract

The invention discloses a device for recovering Nd-Fe-B magnetic powder, comprising a vacuum box and an article table. The vacuum box is filled with nitrogen; the article table is arranged in the vacuum box; the vacuum box is provided with a feeding and discharging port, a gas inlet and a vacuum port; the feeding and discharging port is opened and closed through a sealing door; one end of the sealing door is articulated with the vacuum box; the gas inlet is communicated with a nitrogen pipe; during feeding and discharging, the nitrogen is filled into the vacuum box through the gas inlet; the vacuum port is connected with the vacuum pie; when the feeding and discharging port and the gas inlet are closed, the vacuum box is vacuumized through the vacuum port; the bottom of the article table is provided with sliding rolling wheels; a guiderail is arranged in the vacuum box; and the article table moves on the guiderail through the rolling wheels. The device for recovering the Nd-Fe-B magnetic powder is arranged in the nitrogen surrounded or vacuum environment so as to prevent the oxidization of the Nd-Fe-B magnetic powder. Because the vacuum box is provided with the sealed feeding and discharging port, the Nd-Fe-B magnetic powder can be put in or taken out repeatedly, and the Nd-Fe-B magnetic powder can be taken out after accumulating to a large amount.

Description

technical field [0001] The invention relates to a process device for NdFeB sintering and molding, in particular to a recovery device for NdFeB magnetic powder. Background technique [0002] At present, NdFeB permanent magnet materials have become the most magnetic and cost-effective magnetic materials in the contemporary era. NdFeB permanent magnet materials are formed through formulation, smelting, hydrogen breaking, powder making, pressing and sintering. During the sintering process, each All batches of products need to extract some NdFeB magnetic powders for product quality inspection. After the inspection, these NdFeB magnetic powders are placed in the air, but NdFeB magnetic powders are easily oxidized in an oxygen-containing environment. Once oxidized, not only the magnetic properties are affected impact, and the products are easily scrapped, so these NdFeB magnetic powders are collected and thrown away later. The actual production process produces at least one kilogra...

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Problems solved by technology

[0002] At present, NdFeB permanent magnet materials have become the most magnetic and cost-effective magnetic materials in the contemporary era. NdFeB permanent magnet materials are formed through formulation, smelting, hydrogen breaking, powder making, pressing and sintering. During the sintering process, each Batches of products need to extract some NdFeB magnetic powders for product quality inspection. After the inspection, these NdFeB magnetic powders are placed in the air, but NdFeB magnetic powders are easily oxidized in an oxygen-containing environment. Once oxidized, not only the magnetic properties are affected impact, and the product is easy to be scrapped, so these NdFeB magnetic powders are collected and thrown away later. The actual production process produces at least one kilogram of waste gas NdFeB magnetic powder every day.

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