Keywords：rotary hydrogen broken furnace,hydrogen broken furnace,hydrog

Rotary NdFeB hydrogen fragmentation reaction furnace

Rotary NdFeB hydrogen fragmentation reaction furnace referred to as rotary hydrogen broken furnace or hydrogen broken furnace. Rotary hydrogen broken furnace is NdFeB alloy material is pulverized effective processing technology equipment (rare-earth alloy crushing device), the principle is the grain boundary fracture and use of rare earth permanent magnet alloy hydrogen absorption and desorption process of the alloy itself generated through the grain boundary fracture characteristics lead alloy powder, thereby obtaining an alloy powder of a certain size. Make NdFeB ingot after hydrogen broken furnace processing directly into the next process - Jet Mill, reducing the probability of material oxidation, reduction processes, save time. Coupled with a rotary furnace and convenient access to materials set so that the reaction is very uniform processing of raw materials, improve productivity, increase economic efficiency, to produce high-performance, high-grade NdFeB material.

Rotary hydrogen broken furnace contains ends supported on a support member rotatable furnace, furnace located in the outer layer electric furnace, furnace and a rotary drive mechanism within the furnace was evacuated, charged with hydrogen evacuation means with gas installations, one end of the furnace to feed, a gate, and the other end with a vacuum seal means and valve means in communication, electric furnace made to open and close the left and right furnace structure, the left and right furnace were placed in the lower portion has a roller support frame. In the furnace features a spiral piece. Compared with the conventional rotary hydrogen broken furnace, the heat-type structure to external thermal structure, accelerate the gall to cool within the furnace and the charge, while in the furnace addition of helical segments, simplifying the hydrogenation furnace feeding and discharging operations, its innovative design ideas, greatly improving the hydrogenation milling efficiency, improve and enhance the hydrogen broken furnace safety and operability, simple structure, has broad application prospects.

High rotary hydrogen broken furnace productivity, uniformity, safety, improve performance and quality of NdFeB magnets.

Hydrogen broken furnace using hydrogen decrepitation process (referred to as HD technology), the principle is the use of rare earth permanent magnet alloy hydrogen absorption and desorption process itself produces alloy grain boundary fracture and transgranular fracture boundary characteristics lead alloy powder, thereby obtaining alloy powder certain size.

(Nd2Fe14B + Nd) + H2 Nd2Fe14BH0.4 + NdH2.3 Nd2Fe14B (powder) + NdH2

This technology can be widely used: neodymium iron boron (NdFeB) hydrogenated milling

Rotary NdFeB hydrogen fragmentation reactors

Rotary NdFeB hydrogen fragmentation reaction furnace milling has the following advantages:

1, with the traditional mechanical method is not easy to chunk NdFeB ingot crushed to powder, hydrogenated milling method using no pollution, no noise, less oxidation, and high efficiency.

2, broken powder, accounting for a large proportion of single-crystal particles, help to improve the magnetic properties.

3, hydrogenated broken powder particle is very crisp, with agitation mill and jet mill can easily be further ground, and can greatly reduce the time a jet mill flour (jet mill efficiency is improved by 3-4 times).

4, the powder is prepared in a vacuum and hydrogen atmosphere, so less oxygen, help to improve the magnetic properties.

5, pressed powder body has a low coercivity, which is conducive to the operation of the rear step, easy handling, loading furnace.

6, the pressed body during sintering release hydrogen, is a good reducing atmosphere, which can effectively prevent oxidation during sintering body.

7, which can effectively reduce the sintering temperature to obtain the optimum magnetic properties.

8, sintered magnet corresponding optimal magnetic grain sizes when smaller, and uniformity, microstructure, corrosion resistance, plating resistance.

9, through alignment of the original ingot microstructure and HD process conditions, effective control powder particle shape and size distribution.

Rotary hydrogen broken furnace parameters:

Model	Rated weight	Maximum temperature	Working Pressure	Pressure rise rate	Drop rate	Cycle
XZHD-250	250 Kg	600 ℃	-0.1~0.096 MPa	≤1 Pa/min	≤10 Pa/min	≤8 h
XZHD-500	500 Kg	600 ℃	-0.1~0.096 MPa	≤1 Pa/min	≤10 Pa/min	≤12 h
XZHD-1000	1000 Kg	600 ℃	-0.1~0.096 MPa	≤1 Pa/min	≤10 Pa/min	≤14 h

More Rotary NdFeB hydrogen fragmentation reaction furnace:http://www.industrial-furnace.com/industrialfurnaces/Rotary_Furnace/hydrogen_broken_furnace.html

Rotary NdFeB hydrogen fragmentation reaction furnace

Rotary NdFeB hydrogen fragmentation reaction furnace

Abstract

Keywords：rotary hydrogen broken furnace,hydrogen broken furnace,hydrog

Rotary Furnace Article

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