Method for recovering NdFeB waste material by cold crucible induction smelting technology

An induction smelting and vacuum induction smelting technology is applied in the field of recycling NdFeB waste, which can solve the problems of serious pollution, complex process and high cost, and achieve the effects of small investment in plant construction, simple process and low production cost.

Active Publication Date: 2012-06-13
SHENZHEN SUMMIT LEVITATION METALLURGICAL SCI & TECHN
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the defects of complex process, high cost, serious pollution and large investment in the recovery of NdFeB waste in the existing chemical treatment method, and to provide a kind of refrigeration equipment with simple process, no pollution, low cost and small investment. Method for recovering NdFeB waste by crucible induction melting technology

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  • Method for recovering NdFeB waste material by cold crucible induction smelting technology
  • Method for recovering NdFeB waste material by cold crucible induction smelting technology
  • Method for recovering NdFeB waste material by cold crucible induction smelting technology

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Embodiment Construction

[0032] see Figure 1 to Figure 2 , the present invention proposes a kind of method that reclaims NdFeB waste material with cold crucible induction smelting technology, takes recycling and processing NdFeB waste material 1500 tons / year as example, this recovery method comprises the following steps:

[0033] Step 1: Pre-treatment process: first manually sort out the obvious foreign matter in the NdFeB waste, then use kerosene to clean the oil on the surface of the waste, and then crush the waste into particles with a particle size of less than 3mm, and select non-ferrous materials in a magnetic separator. Magnetic debris, and finally dry the magnetically separated materials;

[0034] Step 2: Rough purification process: such as figure 1 As shown, NdFeB waste is heated in cold crucible vacuum induction smelting equipment 1, and after melting, the power is increased to make the feed liquid 7 churn to remove volatile impurities, and then the power is reduced to make the impurity sl...

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Abstract

A method for recovering an NdFeB waste material by a cold crucible induction smelting technology. The method comprises steps of: 1. a pre-treatment operation; 2. a crude purification operation; 3. a fine purification operation; and 4. a mixing remelting operation. The method for recovering an NdFeB waste material by a cold crucible induction smelting technology of the invention has simple process, no pollution, low cost and small investment.

Description

technical field [0001] The invention relates to a method for recycling NdFeB waste. Background technique [0002] Rare earth is an important strategic material, and the rare earth permanent magnet material NdFeB alloy has become the core material of high-tech industries such as weapons, aerospace, computers, automobiles, electronics, instruments, motors, medical equipment, and audio equipment. [0003] Rare earth permanent magnet material NdFeB alloy is the most powerful permanent magnet material discovered in 1982 so far. Its main chemical components are Nd (neodymium), Fe (iron), and B (boron). Its main phase unit cell is crystallographically It is a tetragonal structure with the molecular formula Nd 2 Fe 14 b. In addition to the main phase Nd 2 Fe 14 In addition to B, NdFeB alloy also contains a small amount of Nd-rich phase, B-rich and other phases. Among them, the main phase and Nd-rich phase are the two most important phases that determine the permanent magnetic ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B9/04C22B59/00C22C1/02C22C28/00
CPCY02P10/20Y02P10/25
Inventor 李碚
Owner SHENZHEN SUMMIT LEVITATION METALLURGICAL SCI & TECHN
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