Process Efficiency Improvement TRIZ Cases

Plasma surface modification and staged acid-alkaline leaching improve rare earth, phosphorus, and fluorine recovery with lower process pollution.

A trithionate-sulfite eluant improves precious metal elution from resin while limiting reagent use, waste, and resin instability.

A chelating and reducing reset solution strips sulfur, jarosite, and EPS layers from leached copper ore heaps to restore faster copper recovery.

Low-L:S acidic leaching with ion exchange extracts REE and yttrium from phosphogypsum while removing radium for gypsum reuse.

Partial hydrogen reduction below 1000°C converts zinc ferrite for acid leaching, cutting iron contamination and avoiding zinc vapor issues.

Medium manganese and controlled rolling plus heat treatment deliver 690 MPa steel plate strength with lower alloy cost, uniform structure, and low yield ratio.

Molten alkali and oxide phases immobilize platinum-group metals on ceramic, enabling lower-corrosion recovery with less energy and chemical use.

Oxidizing cerium to Ce(IV) and raising pH to 1-2 precipitates cerium and thorium, improving rare earth recovery and safer handling.

Controlled dewatering of low-grade iron ore at 100-800°C improves pellet strength while limiting bursting and preserving grindability.

Voltage-driven leaching extracts lithium directly from α-spodumene, avoiding high-temperature conversion and heavy sulfuric acid use.

Adding an S-source to flash smelting matte converts excess metallic Cu into matte, reducing brick damage, impurity buildup, and discharge risk.

Condensed phosphoric acid dissolves monazite and xenotime at 215-300°C, cutting fine grinding, residence time, and radiation dust hazards.

A pH-shifted two-stage leach oxidizes residual sulphides after fine grinding, unlocking precious metals and lowering cyanide use.

An aqueous two-phase polymer process separates and precipitates Cr(VI) from sulphate pickling baths, reducing hazardous sludge and enabling bath reuse.

Staged HCl chlorination and condensation separates aluminum from scandium in laterite nickel slag, improving purity and recovery.

Adjusting Al2O3, MgO, and SiO2 relative to total Fe raises slag viscosity, preventing pellet fusion and clustering without added covering steps.

Controlling ore powder size distribution and volatile matter helps green iron ore pellets resist bursting while maintaining handling strength.

A coal, charcoal, and starch reducing system improves internal reduction uniformity in nickel oxide ore smelting to raise ferronickel grade.

Melting magnesium scrap with aluminum forms non-combustible intermetallics, cutting SF6 use, safety risks, and crushing cost.

A gradually decreasing brine flow improves lithium adsorption at low temperature and enables desorption solutions above 500 mg/L.

Controlling oxide inclusions with tuned Si, Al, Mg, Ca, and O levels cuts linear flaws and pitting in high-Ni alloys.

Slag basicity and trace Mg, Ca, and O control suppress MgO·Al2O3 inclusions in high-nickel alloy, reducing surface flaws and cost.

Ultrasonic cavitation, rotary stirring, and a baffle plate improve melt degassing, suppress vortices, and form uniform semisolid slurry.

Mechanochemical milling with ammonium bicarbonate enables selective room-temperature metal recovery from mixed inputs with low energy use and mild reagents.

Direct carbothermal reduction and electrorefining extract high-purity titanium from low-grade ores while cutting hazardous chemicals and emissions.

A heated rotary kiln selectively sublimes molybdenum oxide from spent catalysts, enabling up to 95% recovery with lower energy use and emissions.

Controlling sulfate in heap leach liquor preserves thermophilic microbial activity, regenerates ferric ions, and improves copper recovery from sulfidic ores.

Successive liquid-liquid extraction separates cobalt and manganese before nickel, improving nickel salt purity with less process complexity.