DRI by RHF (rotary hearth furnace)
DRI by RHF (rotary hearth furnace) is a technology that uses solid carbon to reduce iron ore into metallic iron. This technology is mainly applied to raw materials such as iron ore powder, laterite nickel ore, vanadium titanium magnetite, etc. After batching, mixing, balling, and drying, carbon containing pellets are added to a rotary bottom furnace with an annular furnace and a rotatable furnace bottom for reduction reaction at a high temperature of about 1350 ℃. The product of direct reduction of iron by rotary hearth furnace is usually metalized pellets, with a metalization rate of over 80%, which can be used as blast furnace raw materials or for electric furnace steelmaking.
The production process of direct reduction of iron by rotary hearth furnace has the following characteristics:
1. Chemical composition stability: The chemical composition of directly reduced iron is stable, effectively diluting the residual and mixed metal element content in steel and improving the quality of steel.
2. Low content of harmful elements: Low content of harmful elements such as P and S can shorten the refining time.
3. Efficient and energy-saving: reducing the number of loading times and power outage operations, fast melting speed, low power consumption, improving production efficiency and reducing costs.
4. Environmental Protection: Stable power supply operation, minimal smoke and dust, and good working environment.
