Global Patent Index - EP 0266302 B1

EP 0266302 B1 19930929 - COOLING AGGREGATE AND METHOD FOR COOLING HOTROLLED ROLLING STOCK WITH/WITHOUT DIRECT PATENTING IN PRESSWATER

Title (en)

COOLING AGGREGATE AND METHOD FOR COOLING HOTROLLED ROLLING STOCK WITH/WITHOUT DIRECT PATENTING IN PRESSWATER

Publication

EP 0266302 B1 (DE)

Application

EP 87710010 A

Priority

DE 3626741 A

Abstract (en)

[origin: EP0266302A1] The cooling aggregate and method according to the invention are used for cooling shaped and hot-rolled rolling stock of steel or metal running through at rolling speed. According to the application, the heat extraction involving many known and still unknown imponderables is carried out, during the cooling of hot-rolled rolling stock, in a cooling aggregate with preferably three pressure spaces, as shown in Figures 1, 3 and 10, in order thereby effectively to avoid the danger of an unstable heat extraction, as shown in Figures 5 and 7. The particular actual cooling temperature is brought to the desired cooling temperature by varying the quantity of pressure water flowing into the convection pressure space (1), as a result of which the fraction of pressure water in relation to the vapour fraction in the pressure-water/vapour mixture in the evaporation pressure spaces is either reduced or increased, thereby reducing or increasing the heat extraction and consequently increasing or reducing the cooling temperature. By means of this cooling aggregate and method, it is possible to increase the heat extraction per dm<3> of pressure water considerably, with the result that the uniformity of cooling is improved and the quantity of pressure water to be used per ton of finished rolling stock can be lowered by 50 to 80%, as shown in Figure 11, and at the same time to carry out the cooling in such a way that no detectable undesirable structural constituents dependent on quality and caused by the cooling form in the finished rolling stock. <IMAGE>

IPC 1-7

B21B 45/02

IPC 8 full level

B21B 45/02 (2006.01); B21B 1/18 (2006.01); B21B 1/26 (2006.01)

CPC (source: EP)

B21B 45/0218 (2013.01); B21B 45/0224 (2013.01); B21B 1/18 (2013.01); B21B 1/26 (2013.01)

Designated contracting state (EPC)

BE DE ES FR GB IT SE

DOCDB simple family (publication)

DE 3626741 A1 19880218; AT 390273 B 19900410; AT A192987 A 19890915; DE 3787612 D1 19931104; EP 0266302 A1 19880504; EP 0266302 B1 19930929; ES 2046213 T3 19940201

DOCDB simple family (application)

DE 3626741 A 19860807; AT 192987 A 19870730; DE 3787612 T 19870807; EP 87710010 A 19870807; ES 87710010 T 19870807