Innovation and Technology


glass melting furnace

Glass melting furnace, also known as a glass melting tank or glass melting oven, is a part of the glass-making process where glass is melted. It is constructed from refractory bricks. The glass melting furnace and process involves heating the pre-prepared raw materials to the appropriate temperature, with glass melting occurring at temperatures between 1,400 to 1,600 degrees Celsius (2,552 to 2,912 degrees Fahrenheit). The raw materials are heated and melted into liquid glass, achieving initial melting. The formed glass products are then slowly cooled in the glass melting furnace, also referred to as annealing ovens during this stage. This glass melting furnace and process releases internal stress, enhancing the strength and stability of the glass.

60,000 Tons Glass Melting Furnace

Annual Production of 500,000 Tons of High-Quality Lightweight Glass Bottles and 60,000 Tons Glass Melting Furnace Technical Renovation Project

TypeCapacity RangeMain Applications
Small Glass Melting Furnace5 to 50 tonsSmall batch, multi-variety glass products, such as laboratory glass, art glass, and specialty glass
Medium Glass Melting Furnace50 to 200 tonsMedium-scale glass melting production, such as daily-use glass and architectural glass
Large Glass Melting FurnaceAbove 200 tonsLarge-scale continuous glass melting production, such as flat glass, bottle glass, and automotive glass
Extra-Large Melting Furnace1000 tons and aboveUltra-large-scale industrial glass melting production, such as ultra-large flat glass production lines

oxy-fuel glass melting tank furnace

The combustion mode of an oxy-fuel glass melting furnace involves fuel and oxygen. The pure oxygen combustion technology, consisting of oxygen and fuel, has become a solution in glass melting oven to replace the conventional combustion method using air and fuel. This is because pure oxygen combustion has excellent performance in terms of environmental protection, energy savings, production output, quality, reducing equipment investment, and saving plant space. Consequently, glass melting tank in developed countries such as those in Europe and North America have mainly evolved into oxy-fuel glass melting tanks(electric glass melting oven are usually used for smaller furnace types or special glass). Comprehensive technical services are provided for the structural handling of the glass melting oven section, flue, flow holes, working tank, flow channels (feeding channels), feeder section, the arrangement of oxy-fuel burners, selection of parameters and models, steel structure treatment, insulation design, civil engineering transformation plans and glass melting furnace and process requirements, cold air system design, kiln heating technology, and charging and thermal protection technology.

glass melting tank furnace
oxy-fuel glass melting furnace
full-oxy combustion flame
full-oxy combustion flame

Advantages of Oxy-fuel Combustion glass melting furnace and process in Glass Furnaces

  • Oxy-fuel glass melting tank furnace save fuel and improve overall corporate efficiency;
  • Oxy-fuel glass melting tank furnace achieve a higher melting rate;
  • Significantly reduce NOx emissions and make exhaust gas treatment more convenient;
  • Pure oxygen combustion tank do not require reversal operations, which can effectively reduce dust emissions and the scattering of batch materials, save batch material waste, and reduce the erosion of arch roofs and breast walls by flying dust;
  • Provide stronger adjustment capabilities, making glass melting furnace and process adjustments more convenient and precise;
  • The glass melting tank furnace has stable combustion, making the glass melting furnace and process more stable, which is beneficial for increasing the yield and improving product quality;
  • Significantly reduces the consumption of refractory materials per ton of glass, achieving green production goals.

Full Oxygen Combustion glass melting oven  vs Air Combustion glass melting oven 

FeatureFull Oxygen Combustion Glass FurnaceAir Combustion Glass FurnaceAdvantage
Combustion ProcessCH4 + 2 O2 → CO2 + 2 H2O + COX + EnergyCH4 + X O2 + N2 → CO2 + 2 H2O + NOX + COX + EnergyHigher combustion efficiency and energy utilization
Water Vapor ConcentrationAbove 50%LowIncreased thermal efficiency, reduced fuel consumption
Exhaust Gas VolumeGreatly reducedHighReduced investment and maintenance costs for exhaust gas treatment
Furnace Pressure DifferenceLarger and more sensitiveSmallOptimized design, improved precision in production process control
Flame CharacteristicsHarder, shorter flame with more concentrated radiation area, higher risk of local overheating or furnace body damageSofter, longer flame with relatively uniform temperature distributionImproved heating efficiency, shortened production cycle
NOx EmissionsExtremely lowHighSignificant environmental benefits, compliance with stricter emission standards
Heat RecoveryHigh efficiencyLow efficiencyImproved overall energy utilization, reduced operating costs
Maintenance CostsLowHighReduced corrosion from NOx and other harmful substances, extended equipment lifespan

The Full Oxygen Combustion Glass Melting Furnace offers higher combustion efficiency and energy utilization, reduced exhaust gas treatment costs, increased thermal efficiency, and reduced fuel consumption. It is environmentally friendly with extremely low NOx emissions. Additionally, it provides improved precision in production glass melting furnace and process control, reduced operating costs, and an extended equipment lifespan with lower maintenance costs.

Oxy-fuel Glass Melting Furnace Manufacture

The primary materials for oxy-fuel glass melting furnaces are refractory materials. The performance of the oxy-fuel glass melting furnace is determined by the quality of these high-performance refractory materials. The upper structure of the furnace predominantly uses refractory materials, mainly consisting of fused cast materials such as the fused cast AZS series, fused cast alumina series, and fused cast chrome corundum series (with a current trend towards using sintered chrome corundum as a replacement).

AZS Fused Cast refractory
Fused Cast AZS
fused cast AZS series
Glass Melting Furnace Install
fused cast AZS series
Glass Melting Furnace Install

In the fused cast AZS series, in addition to the commonly used ER1681, ER1685, and ER1711, the series also includes ER1851 and ER1195 (corresponding to codes ZB18*1X and ZB950 Series). The fused cast alumina series includes fused cast α-β and fused cast β materials (corresponding to M\H or MB grades). The main materials we use include the following:

  • Fused Cast α-β Alumina Brick
  • Fused Cast β Alumina Brick
  • BPAL (Sintered α-β) Brick
  • Effective Solution for Crown Drop Pollution – 1851 Series (commonly known as low glass phase products or low silicon low sodium products)
  • High Zirconia Series (1195 or 950 Series)
  • High Purity Magnesia-Alumina Spinel
  • Dense Chrome Bricks, High-Density Chrome Oxide Bricks
  • Fused Rebonded Mullite

We not only provide oxy-fuel glass melting furnaces but also offer maintenance services, refractory material replacement, and support. If you encounter any issues related to the procurement, usage, or maintenance of oxy-fuel glass melting furnaces, please feel free to contact us.

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