Submerged combustion furnace for producing frit and method for producing frit

A submerged combustion furnace for melting ceramic frits comprising:

• at least one submerged combustion burner,
• at least one furnace force measurement system to determine the overall weight of the submerged combustion furnace,
• at least one valve for regulating at least one process variable of the submerged combustion furnace, said process variable being a parameter of the submerged combustion furnace suitable for changing the conditions of the melting of ceramic frits,
• at least one control loop with feedback of the overall weight,
• wherein the at least one control loop is adapted for regulating the overall weight by acting on the at least one valve for regulating the at least one process variable of the submerged combustion furnace,
• characterized in that the at least one valve is configured to:
• regulate the at least one process variable, the at least one process variable being a fusion energy supply to the submerged combustion furnace, and
• keep constant the raw material feed into the submerged combustion furnace.