Energy-saving hydrogen decrepitation method

Abstract

The invention provides an energy-saving hydrogen decrepitation method. The method has the beneficial effects that hydrogen decrepitation is carried out on prepared rare earth alloy materials by adopting a plurality of hydrogen decrepitation mechanisms arranged on a guide rail; after one hydrogen decrepitation mechanism completes reaction, a rotary heating chamber used in the hydrogen decrepitation mechanism can be put into use in the next hydrogen decrepitation mechanism, so that not only can a reaction furnace be quickly heated and plenty of heat be saved but also the powder preparation efficiency is improved; a baffle is arranged on the heating chamber of each hydrogen decrepitation mechanism and is used for insulating the heating chamber when reaction is not carried out, thus being beneficial to saving the preheating time of the heating chamber and then reducing the energy costs of enterprises; after the rear hydrogen decrepitation mechanism completes reaction, the baffle of the rotary heating chamber and a baffle of a rear end heating chamber are closed via a travel switch installed on the rotary heating chamber and a travel switch installed on the rear end heating chamber, thus the heating reaction is completed; not only can heating be carried out quickly but also the powder preparation efficiency is improved by arranging the rotary heating chambers.

Description

technical field [0001] The invention relates to the technical field of adding powder to rare earth magnetic materials, in particular to an energy-saving hydrogen crushing method. Background technique [0002] Hydrogen crushing furnace is a kind of non-mechanical force to form ingot or flake rare earth alloy material into powder, mainly through hydrogen and rare earth alloy (such as neodymium iron boron alloy Nd 2 Fe 14 B) Reaction, using the intergranular fracture and transgranular fracture produced by the rare earth alloy (such as NdFeB alloy) in the process of hydrogen absorption and desorption, which leads to the pulverization of the rare earth alloy, forming an embrittlement and fragmentation process, thus obtaining A kind of process equipment for rare earth alloy powder with a certain particle size, and when the hydrogen crushing furnace prepares rare earth alloy powder, it needs to be heated by the outside. At present, the way of heating the hydrogen crushing furnace...

AI Technical Summary

Problems solved by technology

At present, the way of heating the hydrogen crushing furnace is that the hydrogen crushing furnace is in a rotating state, and the heating is carried out through the heating cover attached to the outside of the hydrogen crushing furnace. The heating cover is an open structure. After the first heating reaction is completed, the heating cover is retracted. , after the hydrogen crushing furnace is refilled, the heating mantle needs to be preheated again before heating, which not only wastes a lot of heat, but also causes high energy costs for the enterprise, and at the same time, the milling efficiency is low

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