Metal Recycling TRIZ Cases

A non-cyanide stripping component forms a covalent bond with gold to extract it from substrates using controlled electrochemical parameters.

A tilting rotary furnace door assembly seals the vessel to regulate the internal environment and control aluminum thermitting.

Adding SiO2 and CaO fluxes lowers slag viscosity and melting point, enabling efficient alloy separation from waste lithium-ion batteries.

Integrating drum and conveyor separators with rare-earth magnets reduces manual sorting volume from 75% to 40%, resolving high equipment complexity.

Nitric acid leaching with pH balancing recovers nickel and cobalt from complex ores while recycling reagents to lower processing costs.

Complexing agents dissolve stable spinel phases in spent catalyst residue, recovering valuable metals instead of burying waste.

HDDR treatment extracts carbon from recycled R-Fe-B permanent magnet alloys, preventing rare earth carbide formation and preserving magnetic yield.

A thermal reaction system converts raw natural gas into synthesis gas for direct reduction using a hot oxygen burner and nozzle.

Mixed acid decomposes scheelite into soluble phosphotungstic acid, preventing gypsum wrapping and enabling efficient tungsten extraction.

Sequential acid leaching followed by alkaline precipitation removes antimony, silicon, and phosphorus impurities to yield high-purity tantalum for reuse.

Thermal decomposition of resin parts in charged battery packs eliminates high-voltage hazards, allowing safe dismantling without natural discharge delays.

Froth flotation removes mercury from coal combustion ash slurry, resolving regulatory constraints on cement kiln raw materials.

Using waste nonferrous slag as flux reduces process cost and environmental waste while achieving high precious metal recovery rates from industrial residues.

Process dissolves zinc from steelworks powder using concentrated sulfuric acid at mild temperatures to produce a high concentration solution.

An ultrasonic screw feeder agitates a water-based slurry to separate contaminants from titanium chips, reducing hazardous waste and chemical usage.

Calcium silicate forming material binds heavy metal oxides in foundry dust, eliminating RCRA permit requirements and reducing treatment costs.

A hydrometallurgical process precipitates dissolved nickel ions into solid sulphide sludge using stoichiometric excess sulphide.

Pretreating pyrite with silver ions prevents argentojarosite precipitation and minimizes silver loss during copper leaching.

Electrochemical conversion of lithium chloride to hydroxide bypasses complex ion exchange steps required to remove interfering magnesium and calcium ions.

Continuous thermal treatment of aluminum scrap eliminates intermediate storage and circulates carbonization gases into the furnace for energy recovery.

A metal scrap recycling apparatus compresses loose scraps into solid compacts to increase density and remove cutting oil.

Solvent cleaning removes insulating oil from crushed transformer cores, enabling high-purity reclaimed amorphous alloy ribbon production.

Layered iron oxide and carbon sources undergo non-oxidative pyrolysis to reduce high carbon content, optimizing production yield and cost.

Electrolysis reduces conductive oxide scrap to metal or suboxide, eliminating impurities that cause variable grain size in indium hydroxide.

Sodium fluotitanate enables titanium sponge production via aluminium reduction, eliminating chlorine gas hazards and complex electrolysis steps.

Selective extraction process transfers uranium into an organic phase while retaining plutonium in the aqueous phase.

Periodic polarity inversion during electrolysis recovers valuable metals from conductive oxide scrap as high purity hydroxide.

Two-step chlorination volatilization recovers tungsten and titanium from used DeNOx catalysts while avoiding calcium impurities.

Impact crushing breaks down steelmaking slag to enable gravity and magnetic separation, lowering energy consumption and dust generation compared to grinding.

Selective halogen ion control suppresses premature gold dissolution during copper extraction, achieving high separation efficiency.

Heat-treating coated copper wires in oil or nitrogen at 130-300°C carbonizes the chlorine-containing resin, preventing dioxin generation during metal recovery.

Funaria hygrometrica protonemata adsorb gold and platinum ions to reach 10% dry weight accumulation without chemical reagents or pH adjustment.

A centrifuge apparatus melts and extracts solder from coated scrap pieces using a rotating receptacle and surrounding heater.

Ammonia dissolution removes organic contaminants from lithium-ion battery electrodes, reducing energy consumption during subsequent sintering.

A metal melting apparatus uses a high-cycle regenerative system to preheat solid materials via recycled heat.

Electrolysis of conductive oxide scrap with periodic polarity inversion recovers valuable metals as hydroxides.

Segmented stirred-tank reactors maintain uniform concentration ratios to eliminate wide particle size distributions and reduce magnesium contamination.

Pre-milling recycled cemented carbide scrap achieves fine-grained gamma phase while resolving grain growth control challenges.

Anionic ion exchange resin captures molybdenum from diluted acid solutions for technical grade recovery.

An encapsulated cooling head prevents oxidation and thermiting while compressing aluminum dross for efficient heat dissipation.