A furnace containing it, a process for burning fuel and a process for cracking steam in the furnace. The combustion procedures connected to glass melting are the subject of the invention. When the furnace is in use, two chambers that are separated from one another's working spaces are fed with fuel of two different origins. One of those chambers is the only one receiving combustion air. An industrial glass furnace that includes one of the following components for heating batch materials of glass: an electrothermal heat exchanger, a regenerator, an electrical boost, or another heating device . By axially spacing the gas discharge tip and oxygen discharge orifice apart, a delayed combustion is achieved. The burner generates enough heat to enable the production of molten glass from batch materials without the need for regenerators or recuperators. Due to less heat reflection to the burner tip than an annular barrier wall, the partial barrier wall has the advantage of preventing the temperature inside the FGR duct from rising too high and achieving low NOx emissions from the combustion process without overheating the burner tip.
