CN-122012924-A - Waste recovery method containing metal particles

Abstract

The invention relates to a waste recycling method of metal-containing particles, which mainly comprises the following steps of firstly grinding the metal-containing particles, adopting a reasonable physical enrichment method to enrich metal in the waste by 1.1-100 times according to the properties of materials, then placing the enriched metal waste into a furnace to be heated to be above the melting point of the metal, preserving heat for a period of time to separate out part of the metal or alloy, then cooling the rest waste to normal temperature, enriching again by adopting the physical enrichment method, repeating the operation of the first two steps until the metal content in the waste is enriched by more than 35%, then placing the enriched waste into the furnace, adding a slag agent, heating again to separate the metal solution from other impurities, and finally selling the melted and separated metal cast ingot. Compared with the similar invention, the invention is simpler, economical, efficient and environment-friendly, can directly extract pure metal, and has obvious overall advantages.

Inventors

• Request for anonymity

Assignees

• 徐光耀

Dates

Publication Date

20260512

Application Date

20241108

Claims (6)

1. 1. A method for recovering waste containing metal particles comprises the steps of: firstly, grinding the waste material containing metal particles, and enriching the metal in the waste material by 1.1-100 times by adopting a reasonable physical enrichment method according to the material property; then, the enriched metal waste is put into a furnace to be heated to a temperature above the melting point of the metal, and the temperature is kept for a period of time, so that part of the metal or alloy is separated out; Then cooling the residual waste to normal temperature, enriching again by adopting a physical enrichment method, and repeating the operation of the first two steps until the enrichment of the metal content in the waste is more than 35%; Then placing the enriched waste into a furnace, adding a slag agent, and heating again to separate the metal solution from other impurities; and finally, selling the melted and separated metal cast ingot.
2. 2. A method of recycling metal-containing waste material in accordance with claim 1, wherein the metal in the waste material is present in the form of elemental particles.
3. 3. A method of recycling metal-containing particles in accordance with claim 1, wherein the metal particles in the scrap are wrapped or embedded in other non-metallic materials.
4. 4. The method for recovering metal-containing particles as claimed in claim 1, wherein the step (1) is performed by physical enrichment without chemical reaction such as magnetic separation, gravity separation, flotation, extraction, distillation, etc.
5. 5. The method for recovering metal-containing particles as defined in claim 1, wherein the temperature in the step (2) is 30 to 200 ℃ above the melting point of the metal to be enriched.
6. 6. A method for recovering waste containing metal particles as defined in claim 1, wherein the physical enrichment and heating are repeated 1 to 4 times in the step (3).

Description

Waste recovery method containing metal particles Technical Field The invention relates to a method for recycling waste containing metal particles, belongs to the technical field of environmental protection, and in particular relates to a method for simply, efficiently, economically and stably enriching, extracting and recycling metal in waste containing metal particles. Background Because of its excellent physicochemical properties, metal is widely used as a matrix material or an auxiliary material in various aspects of production in the living industry, metal plastic composite materials, metal ceramic composite materials, metal fiber composite materials, and the like. At the end of the processing or life of the product, a large amount of waste material containing inclusions of metal particles, polishing ash, circuit boards, catalysts, etc. are generated, wherein most of the metal is metal elementary particles (a small amount of metal compounds) and inclusions are distributed in ceramics, fibers, or other inorganic materials. Most of common methods are chemical methods or physical and chemical combination methods, more reagents are consumed in the metal recovery process, new solid wastes are generated, and the pure physical methods are rarely adopted to enrich and extract the wastes. Therefore, there is a need to develop a simple, environmentally friendly, efficient, economical, stable, purely physical method for extracting and utilizing such waste materials. Disclosure of Invention The invention provides a method for recycling waste containing metal particles, which comprises the following steps: firstly, grinding the waste material containing metal particles, and enriching the metal in the waste material by 1.1-100 times by adopting a reasonable physical enrichment method according to the material property; then, the enriched metal waste is put into a furnace to be heated to a temperature above the melting point of the metal, and the temperature is kept for a period of time, so that part of the metal or alloy is separated out; Then cooling the residual waste to normal temperature, enriching again by adopting a physical enrichment method, and repeating the operation of the first two steps until the enrichment of the metal content in the waste is more than 35%; Then placing the enriched waste into a furnace, adding a slag agent, and heating again to separate the metal solution from other impurities; and finally, selling the melted and separated metal cast ingot. The method for recycling the waste containing the metal particles comprises the following steps of: Preferably, the physical enrichment method is gravity separation, magnetic separation, floatation, distillation and extraction; the method for recycling the waste containing the metal particles comprises the following steps of: Preferably, the temperature is 30-200 ℃ above the melting point of the metal to be enriched. The method for recycling the waste containing the metal particles comprises the following steps of: Preferably, the physical enrichment is repeated, the two steps are heated, 1 to 4 times According to the steps, most of metal simple substances in the waste materials can be economically recovered. Detailed Description The method for recovering waste containing metal particles is described in detail below to make the objects, technical schemes and effects of the present invention more clear and definite. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. The invention is illustrated in more detail by the following examples: Examples 1000 G of industrial waste A is taken, wherein 25% of zinc, 4.7% of iron, 28.3% of water, 17% of organic matters and the other inorganic matters are contained. Phase detection analysis shows that 62% of metallic zinc in the material exists in a metallic state, and iron almost exists in a metallic state. The following steps are adopted to recover the simple substance metal: Firstly, drying at 50 ℃ under vacuum condition to remove water, reducing the water content in the waste material to below 0.5%, adopting magnetic separation to fully select metallic iron, so that the metal content in the raw material is 1.45 times, the metallic zinc content is 36.25%, then placing the treated waste material into an electric furnace to heat to 490 ℃ for 1.5 hours, stirring, taking out the top slag, cooling the metallic zinc liquid cast ingot to obtain 111.5 g of zinc, and the metal zinc simple substance recovery rate is 72%, finally, crushing the taken-out slag, carrying out air current separation, enriching the zinc content in the slag by 1.7 times, placing the slag into the electric furnace again, heating to 490 ℃ for heat preservation for hours, taking out the top slag, cooling the metallic zinc liquid cast ingot to obtain 38.75 g of zinc, so as to obtain 56.44 g of metallic zinc accounting for 96.9% of metal