Abstract:
PROBLEM TO BE SOLVED: To provide a method and an apparatus for preventing inconvenient undercooling in an edge area of a cast strand. SOLUTION: The flow 10 rich in energy of a cooling medium is formed, and straightened in the water-flowing direction to the edge area 11, the flowing water 9 is changed in direction from the edge area 11, and discharged in an outflow opening 12 present in both sides of a cast strand 6 of a secondary cooling chamber 8. Spray nozzles 17 to form the flow 10 rich in the energy and arranged to an outflow outlet are provided in a row. The spray nozzles 17 are provided on the upstream working side of the cast strand 6 on a bottom opening 7 belonging to the secondary cooling chamber 8 at a relatively small distance, and the large number of spray nozzles are arranged in each row 15 in the width direction, and connected to a feed pipe 18 via reducers 1-5.
Abstract:
PROBLEM TO BE SOLVED: To improve a mold or continuous casting operation in a continuous casting method and its apparatus. SOLUTION: In a thermal control method for a copper plate facing to steel of a continuous casting mold regarding different casting speeds, different copper plate thickness, different casting sizes, different water amount and different water pressure respectively, the method is characterized in that selectable mold cooling water temperature at an outlet of the mold is constantly maintained unrelated to a casting speed. Temperature of the outlet of the mold is measured and controlled by a two way type valve having a short pipe between the outlet of the mold and an inlet of the mold and a bifurcated pipe providing for partial amount of the cooling water from the outlet of the mold to a heat exchanger. Hot cooling water at the outlet of the mold is mixed with cooled water at the outlet of the mold, and cooling water amount and pressure of at the outlet of the mold, in which cooling water temperature is controlled dependent on casting condition, is also controlled. Then, molding cooling water at the outlet of the mold is circulated through the mold by a pump station so as to maintain constant temperature.
Abstract:
Disclosed are a method and a device for continuously casting billets (1), among others, which are made of liquid metals, particularly steel materials. According to the invention, heat is removed in a primary cooling zone (4), further cooling taking place in a secondary cooling zone (7) with the aid of a dynamic spraying system (6) by means of nozzles (8) that impinge the width (9) and the metallurgical length (10a) of the billet while the heat distribution is determined and the surface temperature is measured by temporarily sampling the billet surface. The aim of the invention is to obtain a temperature curve which is advantageous for further processing across the entire cross section of the billet. Said aim is achieved by the fact that the dynamic spraying system (6) is functionally controlled in the form of the distribution of the water quantity and the pressure distribution or pulse distribution across the width (9) and length (10a) of the billet via the discharge temperature which is determined by verifying the surface temperature at the end (10b) of the metallurgical length (10a) of the billet so as to obtain a temperature curve (20) calculated for the billet length (10a) and/or the billet width (9).
Abstract:
The invention relates to a method and a device for draining waste water (7) from the inner bend of the strand guide (3) of a beam blank casting machine. In order to drain said waste water from the beam blank in a targeted and controlled manner, a draining device (6) is arranged in the area of the strand guide (4) for the beam blank, said device being provided with jet nozzles (8). Under the effect of jets (13, 14) directed with high energy against the water flow direction, the waste water is lifted on the formation of a banking-up pressure by means of said draining device (6), directed at the lateral edges (11) of the inner bend (4) of the beam blank (10) and collected in a sintered groove (9), arranged thereunder.
Abstract:
A method and an apparatus for preventing undesirable intensive cooling particularly of the strip edge areas of a cast strand resulting from running water emerging from the bottom opening of a secondary cooling chamber, wherein high--energy spray jets of a deflection medium are produced and directed against the emerging running water transversely of the strip edge areas of the cast strand, such that the running water is deflected from the strip edge areas and is discharged through outlet openings of the secondary, cooling chamber arranged on both sides of the cast strand.
Abstract:
The invention relates to a method and a control device for controlling th e heat removal q in the case of a mould 200 for the casting of metal. By sui table variation of the flow V of a cooling medium 300 through the side plate of a mould, heat removal from the side plate is adjusted to a predetermined setpoint value q Soll. In order not to have to adapt the control of the hea t removal to different thicknesses or coatings of the side plates every time that different moulds are used or to changed adjustments of the side plates during the casting operation or to different grades of steel that may be ca st, it is proposed according to the invention to calculate in real time the actual value for the heat removal q during stationary casting operation suit ably for the cooling medium in each case, inter alia from the difference bet ween the temperature of the cooling medium 300 at the coolant outlet and at the coolant inlet of the side plate 200 and also from material constants.
Abstract:
The invention relates to a method for collecting and evacuating run-off water from the inner arc of the strand guide ( 8 ) of a beam blank casting machine, according to which the cast strand ( 2 ) is solidified and the required dissipation of heat is achieved, among other things, by sprayed water, whereby run-off water can also collect on the inner arc of the strand ( 2 ). The run-off water is collected using a suction head ( 1 ). The run-off water that is collected in the suction head is fluidized using fluidizers or momentum inhibitors. The fluidized water is sucked off and the water-air mixture is split into water and air in a separation device. The invention also relates to a device for carrying out said method, comprising at least one suction device that is arranged or can be driven along the strand guide ( 8 ), said suction device having an attachable suction head ( 1 ) and being equipped with fluidizers. The suction device ( 4 ) is driven along the beam blank preliminary section ( 9 ) by means of manipulators ( 7 ).
Abstract:
The invention relates to a method for collecting and evacuating run-off water from the inner arc of the strand guide ( 8 ) of a beam blank casting machine, according to which the cast strand ( 2 ) is solidified and the required dissipation of heat is achieved, among other things, by sprayed water, whereby run-off water can also collect on the inner arc of the strand ( 2 ). The run-off water is collected using a suction head ( 1 ). The run-off water that is collected in the suction head is fluidized using fluidizers or momentum inhibitors. The fluidized water is sucked off and the water-air mixture is split into water and air in a separation device. The invention also relates to a device for carrying out said method, comprising at least one suction device that is arranged or can be driven along the strand guide ( 8 ), said suction device having an attachable suction head ( 1 ) and being equipped with fluidizers. The suction device ( 4 ) is driven along the beam blank preliminary section ( 9 ) by means of manipulators ( 7 ).
Abstract:
Process for preventing intensive cooling of band edge regions of a cast rod (6) comprises producing an energy-rich spray beam (10) of a deviating medium and directing across the band edge regions against the running water (9) in such a way that the water is deviated from the band edge regions and led in openings of the secondary cooling chamber (8) on both sides of the cast rod. An independent claim is also included for a device for preventing cooling of band edge regions of a cast rod. Preferred Features: The deviating medium is water or a water/air mixture.