Method for Purifying a Metal Melt in an Induction Furnace

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This invention describes a method for purifying molten metal (such as steel) in the crucible of an induction furnace before it is cast. The purification is achieved by immersing one or more specially designed ceramic filter bodies into the flowing molten metal, which actively and efficiently removes non-metallic inclusions (undesired solid impurities) through both physical and reactive chemical processes. The filters may be rotated, placed in specific positions, and can have advanced surface coatings to maximize cleaning efficiency.

Use CasesContent extracted from patent full text and abstract with AI.

• Steel production in foundries to improve the cleanliness of cast products
• Manufacturing of high-performance metal components where material purity is critical (e.g., aerospace, automotive, medical devices)
• Continuous casting processes in steel mills to prevent defects in billets, rods, or slabs
• Production of safety-critical metal parts (brake discs, bearing components, structural parts)
• Quality control in metal recycling to ensure high-grade output
• Foundry settings where flexibility in filter type and position can be used for various alloys

BenefitsContent extracted from patent full text and abstract with AI.

• Substantial increase in the removal efficiency of harmful non-metallic inclusions, resulting in higher quality metal products
• Improved mechanical properties (strength, toughness, fatigue resistance) of cast and forged metal parts
• Faster and more efficient purification process compared to prior methods (can clean large melts in seconds)
• Reduces rejection rates and failure risks in critical components
• Allows adjustable purification by varying filter position, rotation, and composition
• Potentially lower costs due to reduced scrap and increased longevity of components
• Adaptability for different alloys and use in both batch and continuous processes

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The invention relates to a method for purifying a metal melt in the crucible of an induction crucible furnace before said metal melt is poured into a casting mold or into a distributor of the strand casting system, wherein at least one ceramic filter body or filter system is dipped into the flowing metal melt and nonmetallic inclusions (NMIs) moving in the melt are removed.