Method for removing oil from metal chippings and equipment for removing oil from metal chippings

By heating metal scraps with a rotating magnetic field under the protection of inert nitrogen gas, the problems of low oil removal efficiency, large equipment size, and serious pollution in existing technologies are solved, realizing high-purity oil recovery and direct reuse of scraps in a small, efficient, and environmentally friendly device.

CN121532485APending Publication Date: 2026-02-13PRESEZZI EXTRUSION SPA
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Patent Information

Application Number
CN202480042878.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-08-03
Filing Date
2024-07-30
Publication Date
2026-02-13

AI Technical Summary

Technical Problem

Existing technologies and equipment for removing oil from metal scrap suffer from problems such as low efficiency, large equipment size, high energy consumption, serious pollution, high cost, and changes in metallurgical properties, making it difficult to achieve the recovery of high-purity oil and the direct reuse of scrap.

Method used

Under the protection of inert nitrogen gas, the rotating magnetic field generates eddy currents to heat metal debris to 200°C to 300°C, evaporates and recovers the oil. The rotating magnetic field and magnetic induction heating equipment achieve efficient oil removal, and the equipment is miniaturized and automated.

Benefits of technology

It achieves efficient oil removal with a residual oil content of less than 0.4%. The debris can be reused without drying or pretreatment. The equipment is small, efficient, environmentally friendly, pollution-free, and low in cost.

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Abstract

An oil removal apparatus for removing oil from metal debris of non-ferrous metal material, comprising a container for such debris and a container for oil for recovery; the debris container cooperates with a magnetic field generator member, one of such container and said generator member being rotating so as to be able to generate a rotating magnetic field that impacts and passes through the debris to heat the debris from which oil evaporates and subsequently condenses and is recovered into the oil container. A method for removing oil from debris is also described and claimed herein.
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Citation Information

Patent Citations

  • Method of removing petroleum substances from materials contaminated by them and equipment for carrying out this method

    EP2862948A1