Método e equipamento de sinterização de fios para sinterização contínua e redução prévia de material mineral peletizado

A method and strand sintering equipment for continuous sintering and pre-reducing of pelletized mineral material. The equipment includes a strand sintering furnace (1). The equipment includes a connecting channel (14, 15), which provides flow communication from a lower exhaust gas duct (8, 9) to an inlet gas duct (12, 13) to conduct at least part of the gas exiting a heating/sintering zone (II, II) to a cooling zone (V, VI), a gas sensor (16, 17), which is arranged in the connecting channel (14, 15) to detect the gas composition, a leakage air channel (18, 19), which provides flow communication between the lower exhaust gas duct (8, 9) and the atmosphere, and a leakage air valve (20, 21), which is in the leakage air channel (18, 19) to open and close the flow communication. To render the gas composition reductive, a control device (22) is arranged to monitor the gas compositions detected by the gas sensor (16, 17) and, on the basis of that, to control the leakage air valve (20, 21) for controlling the access of air from the atmosphere to the exhaust gas duct (8, 9) to adjust the oxygen content of the gas, and/or to adjust the combustion air coefficient of a burner (7) for adjusting the carbon monoxide content of the gas.