Composite waste recycling rare earth magnetic material and preparation method

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, reducing costs, and high social value

Active Publication Date: 2019-05-03
XUZHOU NANFANG YONGCI MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the prepared materials mainly have low coercivity

Method used

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  • Composite waste recycling rare earth magnetic material and preparation method
  • Composite waste recycling rare earth magnetic material and preparation method
  • Composite waste recycling rare earth magnetic material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0042] 1) Waste disposal:

[0043] First, put the polishing powder waste in a roasting furnace for pretreatment. The pretreatment temperature is 650°C, keep it warm for 2 hours, and then ball mill it to 0.03-0.07mm to get the treated waste, which is set aside; then add the treated waste to the concentration Mix in 8 mol / L sulfuric acid solution, the mass ratio of the treated waste to sulfuric acid solution is 2:1, the mixture is firstly kept at 95°C for 1.5 hours, then kept at 105°C for 1.5 hours, and then soaked with water for 5 times to collect the sediment , dried at 120°C for 1.5 hours, then kept at 1100°C for 1.5 hours, cooled to obtain precipitated rare earth oxide A, and set aside;

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

Embodiment 2

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

[0056] 1) Waste disposal:

[0057]First, put the polishing powder waste in a roasting furnace for pretreatment. The pretreatment temperature is 550°C, keep it warm for 1 hour, and then ball mill it to 0.03-0.07mm to get the treated waste, which is set aside; then add the treated waste to the concentration Mix 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 soaked with water for 3 times to collect the precipitate. , dried at 120°C for 1 hour, then placed at 1050°C for 1 hour, and cooled to obtain precipitated rare earth oxide A for later use;

[0058] Second, the samarium-cobalt waste is used with a mass concentration of 10% Na 2 CO 3 The solution is degreased, and then the waste mate...

Embodiment 3

[0069] In this example, the rare earth permanent magnet material alloy ingot prepared by waste recycling is batched according to the following mass percentages:

[0070] Nd 32%, Y 0.64%, Ce 1.28%, La 0.64%, Pr 1.28%, Gd 0.32%, Sm 0.64%, Co 0.64%, B4%, Hf 0.32%, Be 0.32%, and the rest is Fe. All the other preparation conditions and processes are the same as in Example 1. The mass percent content 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 recycled from composite waste and a preparation method thereof. Background technique [0002] Application No. CN90107845.X relates to an iron-based alloy and a permanent magnet material, which is a preparation method and special equipment for preparing a magnetically anisotropic rare earth-iron-boron alloy strip material. The method is to smelt the rare earth-iron-boron alloy in the smelting chamber, and spray it on the water-cooled single roller in the spraying chamber. The smelting chamber and the spraying chamber are separated from each other and connected only by the nozzle. The pressure difference in the spray quenching chamber is 50-150 mmHg, and the speed of a single roll is 16.5-21.5 m / s. But the prepared material mainly has low coercive force. Contents of the invention [0003] The object of the present invention is to address the above-men...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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