Indian steel manufacturers are among the best in the world at producing quality products and include some of the biggest brands in the industry, including Tata and JSW.
One of the steel products widely produced and sold in India is hot briquetted iron.
The argument I want to make with you is that the high costs in their industry are actually a result of their brand name.
We are a competitive company in this market and we produce products that are both excellent quality and competitively priced.
During the steelmaking process, hot briquetted iron is used as raw material. You may find a wide range of quality levels of these steels in the market.
Hot briquetted iron or HBI is a type of high-quality direct reduction iron (DRI) that is compacted at a temperature of more than 650 °C and has a density of more than 5,000 kg/m3 (kilograms per cubic meter).
Because of the compression process, HBI is significantly less porous and reactive than DRI.
Unlike DRI which can have problems with its heating, HBI does not. DRI’s transportation and management challenges inspired the creation of HBI.
The main market for HBI is the production of steel in electric arc furnaces (EAF), while it is used as a coolant in basic oxygen furnaces (BOF) and as a feedstock for blast furnaces.
Application:
EAF or Electric Arc Furnace is used in steel making process.
A basic oxygen furnace (BOF) is used in steel production (HBI is an excellent coolant)
Materials used in the production of blast furnace (BF)
Advantages of HBI for use in EAF
The production of high-quality steel products or the incorporation of a larger proportion of scrap metal at a lower cost as part of the charge mix is made possible due to the very low residual element content.
Melt stability is aided by chemistry that is both well understood and reliable, as confirmed by analysis.
The ability to store and efficiently use materials depends on the characteristics of its shape and form.
By increasing density, we may use less space for storage, use lower-cost, higher-density raw materials, and reduce the number of bin charges.
can be kept adding to the furnace
It destroys nitrogen and causes nitrogen deficiency of steel
HBI asset value in BOF
HBI has the most competitive BOF rates for the following reasons:
Very small amounts of residual components
The bulk density is approximately 2.8% t/m3, making it denser than scrap metal.
Equivalent mass when heated
Increasing the mass and heat balance makes them more predictable
Some of the financial, environmental and production benefits that can be achieved by using HBI as a blast furnace charge material are as follows:
Reduce your carbon footprint.
Increase in blast furnace output (about 8% for every 10% increase in load metallization).
Reduced coke production (7% less coke is produced for every 10% increase in metallization load).
The steel factory uses hot briquetted iron in the first phase of production. Use of HBI in EAF (Electric Arc Furnace)
Electric arc furnace (EAF) steel production is increasing worldwide. In addition, over the past five years, electric arc furnace (EAF) access to pig iron and sponge iron (DRI) and high briquette iron (HBI) has increased.
Hot briquetted iron, also known as HBI, is not intended to be used instead of scrap metal, but rather as a supplement to increase the total charge of the latter.
HBI is suitable for the production of high quality iron and steel products in all types of furnaces due to its high concentration of iron (Fe) and low amount of residual metal.
Factors such as steel scrap availability, production equipment, metallurgical method and product composition can affect the net value of hot briquetted iron from one smelter to another.
In the following conditions, HBI is strongly recommended:
Overheating in the final stage of blowing occurs when the ratio of hot metal consumed to scrap is too high (using hot briquetted iron as a coolant allows the required temperature to be reached without the need for a cooling process) when the scrap metal There is a shortage of iron ore. It is used as a cooling agent (which reduces productivity) when there is a shortage of scrap and the ratio of hot metal to scrap used causes the final phase of the blasting process to become too hot, iron ore as a A cooling agent is used.
If the sulfur concentration of the pregnant female is low enough.
When there is a limit on the disposal of residual waste.
Justifying the use of HBI in BOF and realizing its benefits
HBI is able to provide a suitable charge for the basic oxygen furnace due to the following:
Very small amounts of residual components
High apparent density, equal to the heated metal and more than the waste metal yield (2.8 tons per cubic meter)
Excess mass and heat balance that are more stable
Due to its many advantages, HBI makes an excellent choice for trim cooling.
Unrestricted discharge from upper trays
In-depth description of the chemical and physical composition of substances
The final steel retains its original chemical composition.
Top charging baskets make it easy to turn on.
Rapid penetration of slag
Slag reduction occurs when this material is used instead of flux.
Improved efficiency and productivity compared to traditional coolers
HBI Blast Furnace Program (BF)
When HBI is used as a charge material in blast furnaces, there are benefits in environmental impact, productivity and increased final cost.
Reducing carbon dioxide emissions and reducing coke production (about 7% for every 10% increase in load metallization) are two of the benefits of increasing load metallization.
What exactly is the purpose of the HBI being thrown into the BF?
Incorporating HBI into the cost of BF has several potential economic benefits.
Since there is a limit to the amount of coke that can be produced, investing in coke ovens is not a smart option due to this limitation.
Considering this issue, the plant should reduce the amount of coke used.
Although purchased coke is used, the price has recently increased to such an extent that it is feasible and desirable to reduce coke consumption to meet the increased cost and simultaneously increase the HBI ratio in the BF load.
Because the price of coke has reached this point.
Due to the fact that the liner of one of the several BFs needs to be replaced, it is essential that the maximum amount of hot metal be removed from the BFs that are still in operation to minimize the amount of production that is further wasted. down the line.
However, the output of only two or three BFs is sufficient to meet the hot metal demand, so the plant always uses all three BFs.
