The present disclosure describes a metal making burner in fluid communication with a gas inlet and comprising an oxygen inlet valve that provides control of oxygen flow to two different discharge lines, such as a main line and a shroud line. This allows distinct “modes” of operation, utilizing only the flow from the single oxygen supply as the control method. The apparatus includes a moving piston with ports therein that meter flow to both discharge lines when the ports line up with a separate set of ports in a cylinder that receives the piston. At low or no pressure from the gas inlet, flow rates follow one ratio of flows between the discharge lines. As pressure from a gas inlet changes in the burner, the piston moves and realigns the ports (opening or closing some of the ports), which results in a different ratio of flows between the discharge lines.

The present disclosure describes a metal making burner in fluid communication with a gas inlet and comprising an oxygen inlet valve that provides control of oxygen flow to two different discharge lines, such as a main line and a shroud line. This allows distinct “modes” of operation, utilizing only the flow from the single oxygen supply as the control method. The apparatus includes a moving piston with ports therein that meter flow to both discharge lines when the ports line up with a separate set of ports in a cylinder that receives the piston. At low or no pressure from the gas inlet, flow rates follow one ratio of flows between the discharge lines. As pressure from a gas inlet changes in the burner, the piston moves and realigns the ports (opening or closing some of the ports), which results in a different ratio of flows between the discharge lines.

An industrial apparatus for the firing of ceramic articles; the apparatus comprises a tunnel kiln provided with at least one side wall, a firing chamber and a transport system configured to convey a plurality of ceramic articles along a conveying path; the apparatus comprises at least one burner, which is provided with a first tubular discharge element, a second tubular discharge element and a suction element for the gases present in the firing chamber; the suction element is arranged between the first tubular discharge element and the second tubular discharge element inside the firing chamber.

An industrial apparatus for the firing of ceramic articles; the apparatus comprises a tunnel kiln provided with at least one side wall, a firing chamber and a transport system configured to convey a plurality of ceramic articles along a conveying path; the apparatus comprises at least one burner, which is provided with a first tubular discharge element, a second tubular discharge element and a suction element for the gases present in the firing chamber; the suction element is arranged between the first tubular discharge element and the second tubular discharge element inside the firing chamber.