Multi-High Mills (KT/KST Mill)

KT Mill (Kobe Twelve-high Mill) is a high-performance rolling mill that combines the qualities of our 4-high and 20-high mills, both of which have excellent strip flatness functions, and meets the demand for improved strip flatness.

The mill employs a number of cutting-edge technologies, including a standard 12-high roll arrangement that provides superior flatness control, our proprietary wedge-type hydraulic roll-gap control system, the Automatic Flatness Control System (AFC), and the Kobelco Operation Support System (KOS), making it an ideal rolling mill for the production of copper alloys, stainless steel, Fe-Ni alloys, and other materials, particularly hard foils.

Kobe Super Twenty-High Mill is a 20-high rolling mill (KST Mill) that meets a variety of customer needs, employing unique technologies such as a wedge-type hydraulic roll-gap control system, the Automatic Flatness Control System (AFC), and the Kobelco Operation Support system (KOS), all of which were developed by Kobe Steel with its superior technical capabilites and extensve experience based on conventional 20-high rolling mills.

Its features include advanced automatic thickness control, automatic gauge control, and centralized programmable control of the whole mill line. KST Mill provides the optimal rolling for stainless steel, copper alloy, Fe-Ni alloy, titanium, and other special alloys.

Each series of rolling mills have a specific roll diameter range. For example, KT160 supports work roll sizes ranging from 30 to 60 mm. Work roll sizes can be selected from any diameter within a range of approximately twice the minimum diameter.

Our multi-high rolling mills have a unique housing structure, which is separated into upper and lower parts and connected by four columns.

Roll-gap control is performed by the hydraulic cylinder connected to a wedge built in the rear side of the back-up rolls of the lower housing. The rolling load is directly received by the housing through the wedge, enabling high-rigidity hydraulic push-up. The wedge-type hydraulic roll-gap control device also enabled fast displacement control of strip thickness with world-class high-speed control.

Our 12- or 20-high rolling mill is equipped with support roll crown adjustment mechanism, intermediate roll lateral (shift) adjustment mechanism, and tilting-rolling function for shape correction, along with the Automatic Flatness Control System (AFC) for feed back control.