Table of Contents
What is HBI steel?
HBI (Hot Briquetted Iron) can be used as a scrap supplement in Electric Arc Furnaces allowing the production of most demanding steel grades. HBI is also used in Blast Furnaces to boost productivity and to reduce the coke consumption or in Blast Oxygen Furnaces as a low-residual substitute for scrap.
What is HBI and DRI?
Hot-briquetted iron (HBI) is a compacted form of DRI designed for ease of shipping, handling, and storage. Hot direct reduced iron (HDRI) is DRI that is transported hot, directly from the reduction furnace, into an electric arc furnace, thereby saving energy. The DRI method produces 97\% pure iron.
What is hot briquetted iron used for?
Hot Briquetted Iron (HBI) is a relatively new product, developed in the past 25 years, as a supplement for pig iron and scrap in electric furnace steel mills. It is a compacted form of direct reduced iron (DRI), which facilitates its handling, storage, and use.
What is Midrex process?
The MIDREX process produces direct reduced iron (hereinafter referred to as DRI). The process reduces iron ore using a reforming gas made from natural gas. The DRI is used mainly as the raw material for electric arc furnaces (EAFs), as a clean iron source substitute for scrap iron.
What is DRI process?
The DRI production process involves the intimate mixing of prepared (sized) iron ore with a reductant, which is also generally used for heating of the ore bed to the temperature needed to achieve adequate reduction rates. The reductant can be a gas or a solid.
What is C Fe ratio in sponge iron?
It is observed that the compressive strength is the maximum for the reduced pellets with the C/Fe2O3 molar ratio of 1.66 for all three layers and is around 3000 N/pellet.
What is HBI?
What is HBI? Hot Briquetted Iron (HBI) is a product produced by the hot sponge iron briquetting (HDRI) process at temperatures above 650 ° C.
How is hot briquetted iron (HBI) made?
In the case of Hot Briquetted Iron (HBI), both are relevant. HBI has been manufactured commercially by four direct reduction processes: FIOR® and FINMET®, both fluidized-bed processes using iron ore fines, and MIDREX® and HYL/ Energiron®, which are shaft furnace processes using iron ore pellets and lump ores.
Why do steelmakers purchase HBI from merchant sources?
The motivation for obtaining HBI from a merchant source can be that local prices for the primary inputs for producing it – iron ore and natural gas – are prohibitive and the steelmaker wants the flexibility to purchase HBI in specific quantities on an as-needed basis.
What is the use of DRI and HBI in blast furnace?
DRI and HBI usage in a blast furnace (BF) allows the reduction in charged coke, the emission of CO2 and the concentration of sulfur in the tapped cast iron; in the BOF and in the EAF, a properly-carburized metal bath, such as pig iron, lets the recovery of the FeO in the DRI and HBI on;