Shaft Furnace TRIZ Cases

A hooded upper stack and peripheral gas outlets create charge preheating while preserving reduction quality across varied raw materials and fuels.

External electromagnets periodically loosen expanding iron ore in direct reduction, preventing shaft furnace blockages without internal mechanics.

Reusing de-dusted vent gas as fuel eliminates air dilution, cutting energy consumption and NOx emissions.

Angled collector arms in a cross-shaped cooling gas collecting member block gas leakage into the reduction zone, preserving thermal efficiency.

Cement coating on iron oxide pellets prevents sticking in vertical furnaces, allowing higher reduction temperatures and improved throughput.

Segmenting the pellet into a carbon-rich core and protective shell resolves the trade-off between natural gas consumption and reduction efficiency.

Replacing traditional gasifiers with a CO2 and steam reformer fed by recovered carbon dioxide optimizes the reductant ratio and reduces fuel consumption.

Electric heating maintains iron ore temperatures above 570 C in shaft furnaces, improving metallization while reducing process time.

Injecting lime or dolomite into bustle gas streams coats iron pellets to prevent cluster formation on furnace walls.

A metallurgical furnace uses a curtain wall and booster charging system to channel gas flow through the upper stack.

Porously coated iron oxide raw material prevents clustering and disintegration in shaft furnaces, ensuring stable operation.

Catalytic conversion in a dry de-dusting system reduces gaseous constituents in direct reduction vent gas, eliminating wet scrubbing energy costs.