A lance (10), for conducting a pyrometallurgical operation by top submerged lancing (TSL) injection, wherein the lance (10) has at least an inner pipe (12) and outer pipe (14) which are substantially concentric. The lower outlet of the inner pipe (12) is set at a level relative to the lower, outlet end of the outer pipe (14) required for pyrometallurgical operation. The lance (10) further includes a shroud (22) through which the outer pipe (14) extends and which is mounted on and extends along an upper portion of the outer pipe (14) to define with the outer pipe (14) a passageway (28) along which gas is able to be supplied for flow towards the outlet end of the outer pipe (14) for discharge exteriorly of the lance (10). The shroud (22) is longitudinally adjustable relative to the outer pipe (14) to enable substantial maintenance of, or variation in, a longitudinal spacing between the outlet ends of the shroud (22) and the outer pipe (14).

An oxygen lance assembly that is at least capable of moving towards or away from the object to be lanced, said assembly including a supply of gaseous oxygen and metallic tubing wherein the oxygen supply is continuously feed through the said tubing when the lance is in use, and the said lance assembly includes a reel, and the said metallic tubing is coiled upon and carried by the said reel, and when in use, the metallic tubing is continuously uncoiled from the said reel as the said metallic tubing is consumed during use.

A gas injection nozzle refractory with one or more gas injection small metal tubes buried therein has improved durability. The gas injection nozzle refractory includes a MgO-C central refractory with a small metal tube buried therein, and a MgO-C peripheral refractory surrounding the central refractory. The central refractory on a plane of the gas injection nozzle refractory has an external shape of a circle with a radius in the range of R+10 to R+150 mm concentric with a virtual circle with a minimum radius surrounding all buried small metal tubes, R mm being a radius of the virtual circle.

A reducing gas injection system for a blast furnace having a blast furnace wall, the system including a reducing gas distribution pipe, one or more injectors mounted to the blast furnace wall at a shaft level, where the reducing gas distribution pipe is attached to the blast furnace wall or its supporting structure, where the injector(s) have a nozzle body with a peripheral wall extending along a longitudinal axis from a front portion, with at least one injection hole, to an opposite rear portion with an inlet port, where the nozzle body includes an inner gas channel for guiding reducing gas from the inlet port to the injection holes(s); where the nozzle body is mounted trough an aperture in the blast furnace wall in such a way that the front portion with the injection hole(s) is located on an inner side of the blast furnace, whereas the rear portion with the inlet port is outside of the blast furnace wall, where the nozzle body includes a peripheral mounting portion configured for connecting the injector in a gas tight manner to the aperture in the blast furnace wall, where the inlet port is in fluidic connection with the reducing gas distribution pipe by means of an injector stock, the injector stock including a feeding pipe connected to the reducing gas distribution pipe, an elbow connected to the feeding pipe and an injector pipe connected to the elbow, the injector pipe being flange mounted in a gas tight manner to the inlet port of the injector and the injector pipe and/or an outlet of the elbow having at least one cardan compensation joint.

A lance (1) for blowing oxygen onto a bath of molten steel including a tip (15) provided with first oxygen ejector (16) and a distributor (17) provided with second ejector (18).

A gas injection device for introducing a process gas into a non-ferrous metal melt and/or slag, in particular a copper melt and/or copper slag, including a hollow-cylindrical lance which is formed from a refractory material and/or graphite, preferably includes a refractory material and/or graphite. The lance has an inlet opening for the process gas and a gas injection module connected to the hollow-cylindrical lance and formed from a refractory material and/or graphite, preferably including a refractory material and/or graphite, with at least one outlet opening for the process gas. The outlet opening includes at least one throughflow element formed from a ceramic material via which the process gas can be introduced into the melt.

A gas injection nozzle refractory with one or more gas injection small metal tubes buried therein has improved durability. The gas injection nozzle refractory includes a MgO—C central refractory with a small metal tube buried therein, and a MgO—C peripheral refractory surrounding the central refractory. The central refractory on a plane of the gas injection nozzle refractory has an external shape of a circle with a radius in the range of R+10 to R+150 mm concentric with a virtual circle with a minimum radius surrounding all buried small metal tubes, R mm being a radius of the virtual circle.

A raw material supply device that supplies a raw material into a flash smelting furnace and supplies first gas and second gas into the flash smelting furnace, includes: a first gas pathway that is provided in a lance and supplies the first gas into the flash smelting furnace; a raw material pathway that is provided out of the lance and supplies the raw material into the flash smelting furnace; a second gas pathway that is provided out of the raw material pathway and supplies the second gas into the flash smelting furnace; and a blade that is provided in the first gas pathway, has an inclined face with which the first gas is collided and revolves the first gas toward a lower side of the flash smelting furnace, the inclined face being inclined with respect to a flow direction of the first gas in the first gas pathway.

A molten metal treatment lance includes a refractory having at least one channel extending through the refractory. A first tubular member having two open ends is located in the channel of the refractory. The first tubular member has a side wall having an inner surface and an outer surface. A second tubular member having an open end and a closed end is positioned in the first tubular member. The second tubular member has a side wall having an inner surface, an outer surface and at least one opening extending from the inner surface of the side wall of the second tubular member to the outer surface of the side wall of the second tubular member. The second tubular member is positioned in the first tubular member so as to form a space between the inner surface of the side wall of the first tubular member and the outer surface of the side wall of the second tubular member.

A method is provided for heating a furnace arranged with a heating zone heated with a burner providing a flame extending in a longitudinal direction and fed with a fuel and a primary oxidant, the burner is operated with a mass relationship between the fed fuel and primary oxidant permitting less than 50% of the fed fuel to be combusted using the primary oxidant, and a respective pair of secondary oxidant lances are provided one either side of the furnace pointing into the heating zone, lancing a secondary oxidant into the heating zone downstream of the burner substantially parallel with a cross plane, such that a temperature is measured downstream of the lances and that each of the lance pairs includes an upstream, low-speed first and a downstream, high-speed second lance, wherein the amount of secondary oxidant supplied via the first lance is regulated to achieve a homogenous lateral temperature profile. A related furnace is also provided.