The invention relates to an oxygen lance guiding assembly having an oxygen lance feeding device, which is disposed on a tap hole drilling unit. The tap hole drilling unit has a drilling rod guiding device for a drilling rod, which is driven by a drilling mechanism, on a receptacle configured to have the drilling mechanism disposed thereon. The oxygen lance feeding device is disposed in an operating position in a space formed between the drilling rod guiding device and the drilling mechanism in such a manner that the drilling rod guiding device serves to form an oxygen lance guiding axis.

A method for refurbishing a tap-hole including making a channel trough a tap-hole block, restoring the channel to form a refurbished tap-hole, detachably connecting a prefabricated refractory insert including a shell to a clay gun, where the insert includes a first and second ends in axial direction, where the second end is blocked, an opening arranged on the first end, a hollow passage in the axial direction, where the hollow passage is accessible through the opening, a plurality of lateral through holes, aligned in a longitudinal direction of the shell, with a constant interval covering 10-25% of the shell, the method further including inserting the insert into the channel, where the clay gun is fluidly coupled with the insert and the channel, injecting a grouting material from the clay gun into the insert and through the through hole into the channel and, disconnecting the insert from the clay gun.

A drill bit for improving performance of a drilling machine is provided. The drill bit includes a drill bit body with a rear end adapted to be connected to a drilling machine, and a leading end with a flat face perpendicular to a longitudinal axis (X-X) of the drill bit body. The drill bit body includes a first tapered portion with diameters increasing from the flat face of the leading end to a maximum diameter (Dmax), a second tapered portion with diameters decreasing from the maximum diameter (Dmax) to the rear end of the drill body, at least three partly-circular recesses formed in the drill bit body thus delimitating as many tapered drilling faces, each of them extending from the flat face of the leading end to the maximum diameter (Dmax). The flat face and the tapered drilling faces have a plurality of protruding teeth and the teeth are cylindrical and have a longitudinal axis (Y-Y) forming an angle with the face supporting the teeth which is less than or equal to 90.

The invention relates to a thermal lance (1) having adequate flexibility and concentrated effective heating capacity for the fusion cutting and/or piercing of any type of material, for example, for piercing and opening tapping passages in melting furnaces that use plugs made of clay or mixtures of, inter alia, alumina, silica and carbon. The thermal lance comprises at least four tubular profiles, one disposed externally and three disposed internally, and more than seventeen cavities housed inside said lance, wherein at least two of said four tubular profiles have different cross-sections, wherein each tubular profile is disposed in a contiguous manner in relation to the other tubular profiles, and wherein each tubular profile is selected from tubular profiles having a circular, square, triangular, hexagonal, oval, or multi-point star-shaped cross-section. The invention also relates to the use of the thermal lance for the fusion cutting and/or piercing of any type of material.

Control device of an impact mechanism operable by a pressure media having an element for reversing the axial pressurization of the percussion piston and the return of the medium. In order to achieve a controllability of impact mechanisms by which the energy and the frequency of the moved percussion piston can be adjusted, at least one channel switchable by the reversal as a return line for the medium from the percussion hammer has at least one switchable element for the flow control.

A pneumatic drilling device comprising: an impact manifold or cylinder in fluid communication with a rotary air manifold or gear box; and a single air inlet. The single air inlet may be in fluid communication with the impact manifold or cylinder.

Impact tool and method for a hammer device that includes impact tool housing and tubular piston structured and arranged for axial displacement in impact tool housing via pressure medium. Tubular piston has essentially radial pressure surfaces structured and arranged on opposite portions of tubular piston to be acted on with pressure medium. Grooves are formed in impact tool housing that are structured and arranged for a reversal of a direction of a pressure medium impingement on pressure surfaces and discharge or recirculation of medium. Grooves include a control recess formed in tubular piston and at least two control grooves for a shift of pressure medium impingement on pressure surfaces that are arranged axially offset in impact tool housing. A controller is structured and arranged to alternatively activate one of the at least two control grooves via connection channels.

A device for supplying a rinsing medium to a tool of a hammer drill and a hammer drill. The device includes at least one of a rotatable and axially displaceable drilling tool holder having at least one supply channel for the rinsing medium, a transfer part interacting with the drilling tool holder, a housing, a feeder structured and shaped essentially in an axially symmetrical manner, and a holding part with a rinsing medium inlet. The feeder and the holding part are arranged as a connected component, and friction bearings are arranged on both sides of the feeder and arranged toward the drilling tool holder. The holding part is structured to be radially displaceable within limits via bending with respect to at least one of the housing and a fixing ring connected to the housing, but positively fixed tangentially.

The invention relates to a manipulator arm (12) for being connected to a manipulator chassis frame (11) disposed in particular in the periphery of a metallurgical smelting furnace, the manipulator arm (12) having a proximal end (35) for being connected to the manipulator chassis frame (11) and a distal end (16, 41) equipped with a first tool receptacle (17) and serving to be connected to a shovel (20, 43). The manipulator arm (12) has a second tool receptacle at its distal end (16, 41), the second tool receptacle being formed irrespective of the first tool receptacle (17) and being intended to be connected to a hammer mill (29) or a drilling machine

An ignitor cap for a thermal lance including a proximal end adapted to receive the thermal lance, a distal end, a housing having a sidewall extending from the proximal end to the distal end and defining a passageway, and primary fuel and secondary fuel disposed within the passageway. At least a portion of the primary fuel is in contact with the secondary fuel and/or the distal end is substantially sealed and the proximal end includes at least one opening such that, when the thermal lance is received in the proximal end of the ignitor cap, gas flows axially through the primary fuel and the secondary fuel, and is then redirected by the sealed distal end back through the primary fuel and the secondary fuel and out through the at least one opening and along an exterior surface of the thermal lance. Also, thermal lances including such an ignitor cap.