Hot Rolling Mill

New Section

This film provides an overview of the processes within a hot rolling mill, focusing on the steel material being processed plastically at high temperatures. The film is made in collaboration with SSO BIA in Berlin.

Hot Rolling Process

• The hot rolling process involves several stages that require knowledge and experience to ensure a high-quality product.

• The material is heated in a reheating furnace and then rolled in the roughing mill.

• After the roughing mill, the material is coil boxed and rolled in a finishing mill.

• The material must undergo mill scale cleansing before rolling to cleanse the surface.

• Water is sprayed at high pressure to remove any traces of mill scale.

• In the roughing mill, the material is rolled from its original thickness down to about three centimeters using a powerful four-high rolling mill with backup rolls and working rolls.

• Vertical rolls are used to control the width of the material during rolling.

• After the roughing mill, the transfer bar (formerly known as the material) is coiled together in a coil box for space-saving purposes and temperature equalization.

• The transfer bar undergoes further mill scale removal before entering the finishing mill.

Finishing Mill

• The finishing mill consists of six stands shaped like four-high rolling mills.

• In this stage, transfer bars are rolled into strips with a thickness between 16 and 1.8 millimeters.

• An up looper measures and controls line speed and strip tension, adjusting itself to control profile and flatness.

• Horizontal adjustment of working rolls controls profile and flatness in different stands.

• Correct strip profile and flatness are crucial before any post-processing starts.

Cooling Section

• The cooling rate is adapted to each strip to produce appropriate microstructure and material properties of the end product.

• During coiling, the temperature varies between 150 and 750 degrees centigrade.

• After coiling and subsequent cooling, the strip can be sold directly to the customer or undergo additional processing stages.

New Section

This section provides an introduction to the film and its collaboration with SSO BIA in Berlin. It also highlights the importance of high temperatures in processing steel material.

Introduction

• This film is a production of Dollar Now University.

• The film provides an overview of processes within a hot rolling mill.

• Collaboration with SSO BIA in Berlin.

• Steel material is processed plastically at very high temperatures.