The production process of hot-rolled coil includes steps such as preheating of steel billets, rough rolling, intermediate rolling, and finish rolling, covering energy consumption, material consumption, waste treatment, and environmental emissions required in the production process.

Hot-rolled coil is a steel product manufactured through the hot rolling process. It involves rolling preheated steel billets into flat plates of certain thickness under high temperatures. The primary characteristics of this type of steel are its excellent ductility and toughness, which make it easy to form and process in industrial applications. Carbon steel, also known as plain carbon steel, contains about 0. 02%-2%. Carbon steel is categorized into high-carbon steel, medium-carbon steel, and low-carbon steel. The higher the carbon content, the greater the hardness, strength, and wear resistance of the steel after heat treatment, and it becomes more brittle. The lower the carbon content, the softer and more ductile it becomes. Carbon steel hot-rolled coils are widely used in construction, machinery manufacturing, automotive, shipbuilding, and other industries to manufacture various structural components and parts. Due to its cost-effectiveness and processing flexibility, it is one of the most commonly used types of steel.