The invention relates to a method for smelting non-ferrous metal sulfides (13) in a suspension smelting furnace and to a suspension smelting furnace. The suspension smelting furnace comprises at least one injection means (18) for injecting at least one of fluid (19) and pulverous matter (20) into a settler (2) of the suspension smelting furnace from at least one of a first side wall structure (8) and a second side wall structure (9) of the settler (2) so that fluid (19) and/or pulverous matter (20) is injected into the settler (2) above a top surface (16) of a layer of melt (15) in the settler (2).

The invention relates to a method for smelting non-ferrous metal sulfides (13) in a suspension smelting furnace and to a suspension smelting furnace. The suspension smelting furnace comprises at least one injection means (18) for injecting at least one of fluid (19) and pulverous matter (20) into a settler (2) of the suspension smelting furnace from at least one of a first side wall structure (8) and a second side wall structure (9) of the settler (2) so that fluid (19) and/or pulverous matter (20) is injected into the settler (2) above a top surface (16) of a layer of melt (15) in the settler (2).

The invention relates to a method of making a mineral melt, the method comprising providing a circulating combustion chamber which comprises an upper zone, a lower zone and a base zone, injecting primary particulate fuel and particulate mineral material and primary combustion gas into the upper zone of the circulating combustion chamber, thereby at least partially combusting the primary particulate fuel and thereby melting the particulate mineral material to form a mineral melt and generating exhaust gases, injecting into the lower zone of the circulating combustion chamber, through at least one first burner, secondary combustion gas and gaseous fuel and secondary particulate fuel, wherein the secondary combustion gas and gaseous fuel and secondary particulate fuel are injected via a single first burner, wherein the amount of secondary combustion gas injected via each first burner is insufficient for stoichiometric combustion of the total amount of gaseous fuel and secondary particulate fuel injected via that first burner, and injecting tertiary combustion gas into the lower zone of the circulating combustion chamber, through at least one tertiary combustion gas injector, whereby the tertiary combustion gas enables completion of the combustion of the gaseous fuel and the secondary particulate fuel, separating the mineral melt from the hot exhaust gases so that the hot exhaust gases pass through an outlet in the circulating combustion chamber and the mineral melt collects in the base zone. The invention also relates to apparatus suitable for use in the method.

The invention relates to a method of making a mineral melt, the method comprising providing a circulating combustion chamber which comprises an upper zone, a lower zone and a base zone, injecting primary particulate fuel and particulate mineral material and primary combustion gas into the upper zone of the circulating combustion chamber, thereby at least partially combusting the primary particulate fuel and thereby melting the particulate mineral material to form a mineral melt and generating exhaust gases, injecting into the lower zone of the circulating combustion chamber, through at least one first burner, secondary combustion gas and gaseous fuel and secondary particulate fuel, wherein the secondary combustion gas and gaseous fuel and secondary particulate fuel are injected via a single first burner, wherein the amount of secondary combustion gas injected via each first burner is insufficient for stoichiometric combustion of the total amount of gaseous fuel and secondary particulate fuel injected via that first burner, and injecting tertiary combustion gas into the lower zone of the circulating combustion chamber, through at least one tertiary combustion gas injector, whereby the tertiary combustion gas enables completion of the combustion of the gaseous fuel and the secondary particulate fuel, separating the mineral melt from the hot exhaust gases so that the hot exhaust gases pass through an outlet in the circulating combustion chamber and the mineral melt collects in the base zone. The invention also relates to apparatus suitable for use in the method.

A sealing valve arrangement for a shaft furnace charging installation including a shutter that cooperates with a valve seat and a shutter-actuating device for moving the shutter between a closed position in sealing contact with the valve seat and an open position remote from the valve seat, where the shutter-actuating device includes a tilting shaft connected to the shutter, an electric motor with an output shaft connected to the tilting shaft, and a braking device associated with the electric motor, where the braking device is configured for, when engaged, preventing the output shaft of the electric motor from rotating, the shutter-actuating device further including a transmission means arranged between the output shaft of the electric motor and the tilting shaft, wherein the transmission means is configured for transmitting rotational movement of the output shaft of the electric motor to the tilting shaft, where the transmission means includes a backlash configured for having a predetermined amount of allowed rotation between the output shaft of the electric motor and the tilting shaft.

A sealing valve arrangement for a shaft furnace charging installation including a shutter that cooperates with a valve seat and a shutter-actuating device for moving the shutter between a closed position in sealing contact with the valve seat and an open position remote from the valve seat, where the shutter-actuating device includes a tilting shaft connected to the shutter, an electric motor with an output shaft connected to the tilting shaft, and a braking device associated with the electric motor, where the braking device is configured for, when engaged, preventing the output shaft of the electric motor from rotating, the shutter-actuating device further including a transmission means arranged between the output shaft of the electric motor and the tilting shaft, wherein the transmission means is configured for transmitting rotational movement of the output shaft of the electric motor to the tilting shaft, where the transmission means includes a backlash configured for having a predetermined amount of allowed rotation between the output shaft of the electric motor and the tilting shaft.

High temperature furnaces, calcining, pyrolysis and other high temperature manufacturing processes, composition rearrangements, and equipment. Systems, equipment and processes using oxyfuel combustion using gaseous fuels for cement manufacture. Reactor furnaces using oxyfuel containing natural gas and gravity feed to process pellets forming a pellet bed into cement.

High temperature furnaces, calcining, pyrolysis and other high temperature manufacturing processes, composition rearrangements, and equipment. Systems, equipment and processes using oxyfuel combustion using gaseous fuels for cement manufacture. Reactor furnaces using oxyfuel containing natural gas and gravity feed to process pellets forming a pellet bed into cement.

A valve for a PCI system of a blast furnace including a valve housing with an inlet opening, an outlet opening and a maintenance opening, a maintenance door that is adapted to close the maintenance opening in an operating position during operation of the valve and that is removable from the maintenance opening into a maintenance position, a valve member movably mounted to the maintenance door, wherein, when the maintenance door is in the operating position, the valve member is movable between a closed position for closing the valve and an open position, and, when the maintenance door is in the maintenance position, the valve member is accessible from outside the valve housing.

A valve for a PCI system of a blast furnace including a valve housing with an inlet opening, an outlet opening and a maintenance opening, a maintenance door that is adapted to close the maintenance opening in an operating position during operation of the valve and that is removable from the maintenance opening into a maintenance position, a valve member movably mounted to the maintenance door, wherein, when the maintenance door is in the operating position, the valve member is movable between a closed position for closing the valve and an open position, and, when the maintenance door is in the maintenance position, the valve member is accessible from outside the valve housing.