A method for separating rare earth phosphor from electronic waste powder

Abstract

The invention discloses a method for separating rare-earth fluorescent powder from electronic waste powder. The method comprises the following steps: 1, screening the electronic waste powder, thereby obtaining fine electronic waste particles; 2, conveying the fine electronic waste particles into a fine particle separation device for performing secondary separation, thereby obtaining the materials subjected to secondary separation; 3, performing powder slurry treatment on the materials subjected to secondary separation, allowing the materials to pass through a water sieve, and taking the screen underflow, thereby obtaining wet materials; and 4, sequentially carrying out washing, suction filtration, drying, grinding and screening the wet materials, thereby obtaining the rare-earth fluorescent powder of which the quality purity is not less than 98 percent. According to the method disclosed by the invention, the rare-earth fluorescent powder of which the quality purity is not less than 98 percent can be separated, the mass content of rare earth oxides in the rare-earth fluorescent powder of which the quality purity is not less than 98 percent is not less than 28 percent, the rare earth elements in the rare-earth fluorescent powder can be further conveniently separated by rare-earth purification enterprises, and the method is environmentally friendly, easy and convenient to operate and suitable for popularization and application.

Description

technical field

[0001] The invention belongs to the technical field of fine particle separation, and in particular relates to a method for separating rare earth fluorescent powder from electronic waste powder. Background technique

[0002] With the increasing demand for electronic products in modern life, more and more electronic waste is generated. In order to ensure the dismantling process of e-waste and the lower pollution and recyclability of e-waste, the recyclable utilization of e-waste has become a necessary trend. Electronic waste containing rare earth phosphors is composed of screen cone glass, graphite, rare earth phosphors, aluminum foil, nano-alumina, and dust. Due to the different dismantling methods of electronic waste, traditional methods are used to extract only Rare earth phosphors with a rare earth oxide mass content of only 5% to 10% can be recovered. The particle size of each component in this rare earth phosphor is close, and the specific gravity is not...

Examples

Embodiment 1

[0025] This embodiment includes the following steps:

[0026] Step 1. Pass the electronic waste powder through a 100-mesh sieve, and take the under-sieve to obtain fine particles of electronic waste; the electronic waste powder is composed of the following components in mass percentages: screen cone glass 50%, graphite 7%, 20% of rare earth phosphor, 7% of aluminum foil, 11% of nano-alumina and 5% of dust; the mass content of rare earth oxide in the rare earth phosphor is not less than 30%;

[0027] Step 2. The electronic waste fine particles described in step 1 are transported to the fine particle separation device for primary separation, and the primary separation material is collected at the discharge port of the fine particle separation device, and then the primary separation material is Return to the fine particle separation device for secondary separation, and collect the secondary separation material at the discharge port of the fine particle separation device; figure ...

Embodiment 2

[0031] This embodiment includes the following steps:

[0032] Step 1. Pass the electronic waste powder through a 150-mesh sieve, and take the under-sieve to obtain fine particles of electronic waste; the electronic waste powder is composed of the following components in mass percentages: screen cone glass 45%, graphite 5%, 27% of rare earth phosphor, 8% of aluminum foil, 10% of nano-alumina and 5% of dust; the mass content of rare earth oxide in the rare earth phosphor is not less than 30%;

[0033] Step 2. The electronic waste fine particles described in step 1 are transported to the fine particle separation device for primary separation, and the primary separation material is collected at the discharge port of the fine particle separation device, and then the primary separation material is Return to the fine particle separation device for secondary separation, and collect the secondary separation material at the discharge port of the fine particle separation device; figure ...

Embodiment 3

[0037] This embodiment includes the following steps:

[0038] Step 1. Pass the electronic waste powder through a 200-mesh sieve, and take the under-sieve to obtain fine particles of electronic waste; the electronic waste powder is composed of the following components in mass percentages: screen cone glass 40%, graphite 5%, 30% of rare earth phosphor, 5% of aluminum foil, 15% of nano-alumina and 5% of dust; the mass content of rare earth oxide in the rare earth phosphor is not less than 30%;

[0039] Step 2. The electronic waste fine particles described in step 1 are transported to the fine particle separation device for primary separation, and the primary separation material is collected at the discharge port of the fine particle separation device, and then the primary separation material is Return to the fine particle separation device for secondary separation, and collect the secondary separation material at the discharge port of the fine particle separation device; figure ...

technical field

[0001] The invention belongs to the technical field of fine particle separation, and in particular relates to a method for separating rare earth fluorescent powder from electronic waste powder. Background technique

[0002] With the increasing demand for electronic products in modern life, more and more electronic waste is generated. In order to ensure the dismantling process of e-waste and the lower pollution and recyclability of e-waste, the recyclable utilization of e-waste has become a necessary trend. Electronic waste containing rare earth phosphors is composed of screen cone glass, graphite, rare earth phosphors, aluminum foil, nano-alumina, and dust. Due to the different dismantling methods of electronic waste, traditional methods are used to extract only Rare earth phosphors with a rare earth oxide mass content of only 5% to 10% can be recovered. The particle size of each component in this rare earth phosphor is close, and the specific gravity is not...

Examples

Embodiment 1

[0025] This embodiment includes the following steps:

[0026] Step 1. Pass the electronic waste powder through a 100-mesh sieve, and take the under-sieve to obtain fine particles of electronic waste; the electronic waste powder is composed of the following components in mass percentages: screen cone glass 50%, graphite 7%, 20% of rare earth phosphor, 7% of aluminum foil, 11% of nano-alumina and 5% of dust; the mass content of rare earth oxide in the rare earth phosphor is not less than 30%;

[0027] Step 2. The electronic waste fine particles described in step 1 are transported to the fine particle separation device for primary separation, and the primary separation material is collected at the discharge port of the fine particle separation device, and then the primary separation material is Return to the fine particle separation device for secondary separation, and collect the secondary separation material at the discharge port of the fine particle separation device; figure ...

Embodiment 2

[0031] This embodiment includes the following steps:

[0032] Step 1. Pass the electronic waste powder through a 150-mesh sieve, and take the under-sieve to obtain fine particles of electronic waste; the electronic waste powder is composed of the following components in mass percentages: screen cone glass 45%, graphite 5%, 27% of rare earth phosphor, 8% of aluminum foil, 10% of nano-alumina and 5% of dust; the mass content of rare earth oxide in the rare earth phosphor is not less than 30%;

[0033] Step 2. The electronic waste fine particles described in step 1 are transported to the fine particle separation device for primary separation, and the primary separation material is collected at the discharge port of the fine particle separation device, and then the primary separation material is Return to the fine particle separation device for secondary separation, and collect the secondary separation material at the discharge port of the fine particle separation device; figure ...

Embodiment 3

[0037] This embodiment includes the following steps:

[0038] Step 1. Pass the electronic waste powder through a 200-mesh sieve, and take the under-sieve to obtain fine particles of electronic waste; the electronic waste powder is composed of the following components in mass percentages: screen cone glass 40%, graphite 5%, 30% of rare earth phosphor, 5% of aluminum foil, 15% of nano-alumina and 5% of dust; the mass content of rare earth oxide in the rare earth phosphor is not less than 30%;

[0039] Step 2. The electronic waste fine particles described in step 1 are transported to the fine particle separation device for primary separation, and the primary separation material is collected at the discharge port of the fine particle separation device, and then the primary separation material is Return to the fine particle separation device for secondary separation, and collect the secondary separation material at the discharge port of the fine particle separation device; figure ...

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