New Energy

Application direction

Oxy-fuel combustion technology uses oxygen-enriched air with an oxygen concentration higher than that of ambient air as the combustion medium, achieving significant optimization of the combustion process.

This technology offers multiple advantages:

· Increases combustion efficiency by 15–25%

· Raises flame temperature by 200–300 °C

· Lowers fuel ignition points and accelerates combustion reactions, leading to energy savings

· Promotes complete fuel combustion, reducing flue gas emissions by 20–30%

· Improves thermal efficiency by 15–20%

· Controls the excess air ratio to below 1.1, effectively suppressing the formation of NOx and other pollutants (30–50% reduction)

· Creates favorable conditions for carbon capture

With advances in oxygen generation technology and declining oxygen production costs, oxy-fuel combustion has been widely applied in:

· Steelmaking (oxygen-enriched blast furnaces)

· Nonferrous metallurgy (copper, lead, and zinc smelting)

· Industrial furnaces (glass, ceramics)

· Thermal engineering (boiler systems)

· Environmental protection (hazardous waste treatment)

The technology demonstrates significant energy-saving and environmental protection benefits across these industries.

Technical Features

Outstanding Energy-Saving Performance

Oxy-fuel combustion improves thermal efficiency by 20–40%
In the glass industry, gas consumption is reduced by 20–40%
For every +1% increase in oxygen enrichment in blast furnaces:
·Combustion temperature rises by 40–50 °C
·Pulverized coal injection increases by 20–30 kg/t
·Hot metal output increases by 4%

Wide Industrial Applications

Metallurgy: blast furnaces, electric furnaces, nonferrous smelting
Building materials: glass and cement kilns
Energy: boilers, hot blast stove systems
Applied across 15+ industrial scenarios

Economic Advantages

Oxygen production cost: 0.3 kWh/Nm³
30–40% energy savings compared with cryogenic methods
A 10,000 Nm³/h unit saves ~15 million RMB annually

Intelligent Operating Features

Fully automated, unattended operation
Instant load adjustment from 50–100%
Rapid response to production demands
Maintenance costs reduced by 50%

New Energy

Oxygen-enriched combustion technology demonstrates significant application value in thenew energy sector: · Inlaterite nickel ore smelting, the oxygen-enriched side-blow process can increase thermal efficiency by more than20%, while enabling precise control of ferronickel grade. · In thecalcination of high-nickel ternary materials, the use of93% purity oxygencombined with an intelligent regulation system significantly reduces energy consumption costs. · Inlithium battery electrode production, high-purity oxygen is used as a protective atmosphere, effectively enhancing product consistency.

Through these innovative applications, oxygen-enriched technology achieves an overall15–30% improvement in energy efficiency, providing essential technical support for the advancement of the new energy industry.

Blast Furnace

In modern integrated steel production systems, VPSA oxygen generation technology is becoming the preferred solution for oxygen-enriched blast furnace smelting. Its advantages are mainly reflected in three aspects:

1. The specific oxygen purity requirement of blast furnace operations (oxygen-enriched air rather than pure oxygen) can be perfectly met through the intelligent blending of VPSA-produced oxygen with air.

2. Compared with traditional cryogenic oxygen generation, VPSA technology can reduce oxygen production costs by 30–40%.

3. With flexible start-stop capability(cold start <30 minutes) and wide load adjustment capability(30–110%),VPSA systems can effectively adapt to fluctuations in plant-wide oxygen demand, keeping the oxygen venting rate below 5%.

Leveraging its proprietary front-end oxygen mixing system and extensive engineering expertise, Lirun Technology has delivered customized oxygen-enrichment solutions for leading large-scale steel enterprises. A single system can supply up to 6,500 Nm³/h of oxygen, significantly improving blast furnace productivity (average increase of 0.1–0.15 t/(m³·d)) and reducing the fuel rate by 8–12 kg per ton of hot metal.

Nonferrous Metallurgy

VPSA oxygen technology provides astable oxygen supply (30–93% enrichment)for the smelting of copper, lead, zinc, nickel, and other nonferrous metals. Oxygen-enriched combustion boosts productivity and reduces energy consumption by30–50%. The technology is compatible with a variety of furnace types (bottom-blown, side-blown, and top-blown) and allows flexible oxygen supply adjustment, significantly lowering oxygen costs. For example, incopper smelting, oxygen-enriched processes not only deliver substantial energy savings but also increase SO₂ concentrations in flue gas, enabling efficient sulfuric acid production—achieving bothenvironmental and economic benefits. VPSA technology has already been successfully applied inover 40 nonferrous smelting facilities.

Cement Industry

Oxygen-enriched combustion is akey enabler of carbon capturein cement production. By blending oxygen with recycled high-CO₂ flue gas, the system generates flue gas streams containingover 75% CO₂, ideal for subsequent capture and utilization.

While oxygen cost has historically limited adoption, the maturity of VPSA technology has enabled breakthroughs in cement kilns. Lirun Technology’s VPSA oxygen systems help cement producers achieve15–20% reductions in coal consumptionand30–50% reductions in CO/NOx emissions, supporting bothenergy savingsandemissions reduction. The technology has been included inChina’s National Science and Technology Support Program, demonstrating strong market potential.

Glass & Fiberglass

Lirun Technology’s VPSA oxygen systems provide astable 93% purity oxygen supplyfor the glass and fiberglass industries, enablingoxygen-enriched and full-oxygen combustionto replace traditional air-based combustion.

This achieves substantial energy savings (25–30% for standard glass, >30% for high-borosilicate glass) while reducing NOx emissions. Given the stringent oxygen stability requirements of glass furnaces, we offerequipment leasing and professional O&M servicesto ensure safe, reliable supply and effectively address high oxygen costs.

Full-oxygen combustion, using90–93% pure oxygenwith coal, natural gas, or heavy oil, is reshaping the energy utilization model of glass melting furnaces.

Oxy-Fuel Combustion Technology