摘要:
A continuous casting process of a steel semi-product is provided. The process includes a step of casting using a hollow jet nozzle located between a tundish and a continuous casting mould. The nozzle includes, in its upper part, a dome for deflecting the liquid metal arriving at the inlet of the nozzle towards the internal wall of the nozzle, defining an internal volume with no liquid metal. A simultaneous step of injecting powder through a hole of the dome occurs. The powder has a particle size of 200 μm or less. The dome includes a first device to inject the powder without any contact with the dome and a second device to avoid sticking or sintering of the powder onto the first device.
摘要:
A bubbling plate for a sliding nozzle includes a plate body defining an inner hole therein and a gas-permeable ring installed inside the plate body to define part of the inner hole. The ring has a lower end surface formed with a stepped part, a convex part or a concave part; and the plate body has an upper surface in contact with the lower end surface with the upper surface formed with a stepped part, a concave part or a convex part capable of being opposed to and fittingly engaged with a corresponding part of the ring. The area in which the part of the ring is fittingly engaged with the corresponding part of the plate body has a length of 2 mm or more along a direction of a central axis of the inner hole, and mortar is interveningly provided in at least a longitudinally-extending joint part in the fitting engagement area.
摘要:
The object of the present invention is to provide a system that immediately after the supply of the molten metal is stopped, the molten metal that resides in the pipe can be prevented from dripping from the pipe.The molten metal supplying system comprises a container having a portable container main body that is capable of being hermetically sealed and storing molten metal and that has a passage through which compressed gas is received from an outside, a pipe that has an outlet and that supplies the molten metal stored in the container main body to the outside, the outlet downwardly extending, a reception dish that receives the molten metal and that is capable of being placed below the outlet of the pipe, a holding member that has a fulcrum to the pipe and rotatably holds the reception dish, a wire whose one end is connected to the reception dish or the holding member, and a pair of channel members disposed at the outer bottom of the container main body in a first direction, and a vehicle having a fork that is inserted into the pair of channel members and removed therefrom, a carriage on which the fork is mounted, a lift mechanism that lifts up and down the carriage, and a wire pull and return mechanism that is mounted on the carriage and that pulls and returns the wire with its other end.
摘要:
An apparatus and method for atomizing liquid metal are disclosed. A liquid metal supply is coupled to a nozzle for atomizing a stream of liquid metal in an atomizing zone extending from the nozzle. A viewing instrument provides a field of view extending to the atomization zone. A sensor coupled with the viewing instrument generates an image of the atomizing zone, and a control adjusts a flow rate of the stream responsive to the image.
摘要:
A reinforced ceramic tube for refractory use comprises a settable slurry cast inside a metal sleeve with longitudinal, compliance. In use the sleeve moves with ceramic under thermal stress to avoid major cracking.
摘要:
For the procedure a gas, heated to at least 1000 degrees Celsius, preferably even beyond the liquid temperature of the melt, is blown into the discharge opening (26). In this manner freezing problems and deposits in the discharge opening can be largely prevented. The pouring sleeve (20) according to the invention has a gas supply line (21), leading into a gas permeable insert (23) surrounding the opening (26), which is led for a certain length along the upper range of the sleeve (20) which is in contact with the melt, for the purpose of heating the gas.
摘要:
A gas washing sink for use in introducing gas through a metallurgical vessel into molten metal therein includes a gas permeable refractory inner brick portion and a gas impermeable refractory outer brick portion surrounding the inner brick portion. The inner and outer brick portions define a first sink end to be exposed to the molten metal. The outer brick portion has an end face defining a second sink end to be directed away from the molten metal. A gas distribution chamber has a first end open to the inner brick portion and a second end opening onto the end face of the outer brick portion and defined thereat by an opening. A sealing surface extending concentrically of the opening has pressed thereagainst, at a pressure sufficient to achieve a seal therebetween, a closure member for closing the second end of the gas distribution chamber and having a gas inlet connection for introducing gas into the gas distribution chamber.
摘要:
A member formed of ceramic refractory material has therein an opening. A metal coupling member for attaching a metal member such as a rod or a tube, to the refractory member has an externally threaded portion extending into the opening in the refractory member. The coupling member has a head extending radially outwardly beyond the threads of the threaded portion and embedded in the refractory member. The opening in the refractory member may be internally threaded to receive the threads of the threaded portion of the coupling member.
摘要:
An immersion nozzle for continuous casting of molten steel comprises: an immersion nozzle body having a bore for introducing molten steel supplied from a tundish into a continuous casting mold; two exit ports located symmetrically about the vertical center axis of the immersion nozzle body at a lower portion of the immersion nozzle body for introducing the molten steel into the continuous casting mold; gas blow-in inlets in an inwall of the immersion nozzle body, the center axis line of the blow-in inlets crossing, at right angle, a vertical plane passing through a line connecting the respective centers of the exit ports; and gas blow conduits, each being connected respectively to one of the gas blow-in inlets. The gas blow-in inlets have a height almost equal to a vertical length across the exit ports, the top of the gas blow-in inlets being from 0 to 100 mm above the upper end of the exit ports.
摘要:
A device for casting a metal in the pasty phase in a continuous casting mold comprises a vertical conduit disposed upstream of the mold and provided externally with cooling means a distributor member disposed substantially at the inlet of the conduit to deflect the metal flowing from a casting nozzle towards the inner surface of the vertical conduit which may be extended by a tubular element penetrating into the mold and an inlet section for the conduit at least the inner surface of which is formed by refractory material, the distributor member being disposed in the inlet section. The device may have an injector for injecting a gaseous agent into the vertical conduit below the distributor member, and a further device for causing the metal to rotate in the inlet section.