Patent ID: 11951537
Assignee: DANIELI & C. OFFICINE MECCANICHE S.P.A.
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 10:
11. A method to control a secondary cooling apparatus in a machine for continuous casting of metal products, said secondary cooling apparatus (12) comprising a roller path (15) which moves a cast metal product (P) along an axis of movement (X), a plurality of cooling units (17) equipped with nozzles (18), each nozzle (18) being provided with delivery orifices (19) from which a refrigerant fluid (L) is delivered, on each occasion according to punctual cooling needs, toward said metal product (P),
said method comprising:
activating said delivery orifices (19) individually, in sequence or in combination with each other, so that as the punctual cooling needs of said metal product (P) vary, a flow rate (Q) of refrigerant fluid (L) required on each occasion to cool said metal product (P) is varied,
opening or closing the delivery orifices (19) of respective nozzles (18) in sequence from a first delivery orifice (19a) to a last delivery orifice or from the last delivery orifice to the first delivery orifice (19a) when the flow rate (Q) of the refrigerant fluid (L) increases or decreases,
feeding said delivery orifices (19) with a minimum delivery pressure to obtain said flow rate (Q), and
delivering the flow rate (Q) of refrigerant fluid (L) from the first delivery orifice (19a) and a second delivery orifice (19b) when the flow rate (Q) of refrigerant fluid (L) required to cool the metal product (P) requires a second feed pressure (p1+2) relative to a second delivery orifice (19b) cooperating with a first delivery orifice (19a) which is greater than a second minimum pressure (p02), relative to said second delivery orifice (19b) together with said first delivery orifice (19a).