Composite waste-material-recycled rare earth magnetic material and preparation method therefor

A technology of magnetic materials and mixed rare earths, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problem of low coercive force of materials, achieve the effect of improving magnetic properties, high social value, and improving the environment

Active Publication Date: 2017-06-20
XUZHOU NANFANG YONGCI MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Composite waste-material-recycled rare earth magnetic material and preparation method therefor
  • Composite waste-material-recycled rare earth magnetic material and preparation method therefor

Examples

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Comparison scheme
Effect test

Embodiment 1

[0041] The preparation method of the composite waste recycling rare earth magnetic material of the present invention includes the following steps:

[0042] 1) Waste treatment:

[0043] First, put the polishing powder waste in the roasting furnace for pretreatment. The pretreatment temperature is 650℃, the temperature is kept for 2 hours, and then ball milled to 0.03-0.07mm to obtain the treated waste, which is ready for use; then add the treated waste to the concentration It is mixed in 8 mol / L sulfuric acid solution. After treatment, the mass ratio of waste to sulfuric acid solution is 2:1. The mixture is first kept at 95°C for 1.5 hours, then at 105°C for 1.5 hours, and then immersed in water 5 times to collect sediment , Dried at 120°C for 1.5 hours, and then kept at 1100°C for 1.5 hours, after cooling to obtain precipitated rare earth oxide A, for use;

[0044] Second, use samarium cobalt waste (mass concentration 10%) Na 2 CO 3 The solution is degreasing, and then the waste is ...

Embodiment 2

[0055] The preparation method of the composite waste recycling rare earth magnetic material of the present invention includes the following steps:

[0056] 1) Waste treatment:

[0057] First, put the polishing powder waste in a roasting furnace for pretreatment. The pretreatment temperature is 550℃, the temperature is kept for 1 hour, and then ball milled to 0.03-0.07mm to obtain the treated waste, which is ready for use; then add the treated waste to the concentration It is mixed in 7 mol / L sulfuric acid solution. After treatment, the mass ratio of waste to sulfuric acid solution is 1:1. The mixture is first kept at 80°C for 1 hour, then at 100°C for 1.2 hours, and then immersed in water 3 times to collect the precipitate , Dry it at a temperature of 120°C for 1 hour, and then keep it at 1050°C for 1 hour. After cooling, the precipitated rare earth oxide A is obtained for use;

[0058] Second, use Samarium-Cobalt waste with 10% Na 2 CO 3 The solution is degreasing, and then the was...

Embodiment 3

[0069] In this example, the rare-earth permanent magnet material alloy ingots prepared for waste recycling are prepared according to the following mass percentages:

[0070] Nd 32%, Y 0.64%, Ce1.28%, La 0.64%, Pr 1.28%, Gd 0.32%, Sm 0.64%, Co 0.64%, B 4%, Hf 0.32%, Be 0.32%, and the rest is Fe. The rest of the preparation conditions and process are the same as in Example 1. The mass percentage of N in this material is 1.52%.

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Abstract

The invention provides a composite waste-material-recycled rare earth magnetic material and a preparation method therefor. The alloy material has relatively high coercivity. The preparation method is simple in process, low in production cost, and suitable for realizing industrial production. The material comprises the following components based on mass percentage: 30-35% of Nd, 0.6-0.7% of Y, 1.2-1.4% of Ce, 0.6-0.7% of La, 1.2-1.4% of Pr, 0.3-0.35% of Gd, 0.6-0.7% of Sm, 0.6-0.7% of Co, 2-6% of B, 1.25-1.86% of N, 0.3-0.35% of Hf, 0.3-0.35% of Be and the balance of Fe; and the 1.25-1.86% of N based on mass percentage is included in the material.

Description

Technical field [0001] The invention belongs to the field of metal materials and relates to a rare earth magnetic material for composite waste recycling and a preparation method. Background technique [0002] The CN90107845.X application relates to an iron-based alloy and permanent magnet material, a preparation method and special equipment for preparing magnetic anisotropic rare earth-iron-boron alloy ribbon material. The method is to smelt the rare earth-iron-boron alloy in a smelting chamber, and spray quenching on a water-cooled single roll in the spray quenching chamber. The melting chamber and the spray quenching chamber are separated from each other and connected only by nozzles. During the alloy spray quenching, the melting chamber is The pressure difference in the spray quenching chamber is 50-150 mmHg, and the single roll speed is 16.5-21.5 m / s. But the prepared material is mainly not high in coercivity. Summary of the invention [0003] The purpose of the present in...

Claims

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Application Information

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IPC IPC(8): H01F1/057C22C38/10C22C33/02
CPCC22C33/02C22C38/001C22C38/002C22C38/005C22C38/10H01F1/057
Inventor 张作州
Owner XUZHOU NANFANG YONGCI MATERIAL
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