HIsarna: unravelling the process

  1. Introduction

Need of HIsarna

Brief History

HIsarna process overview

Scale up, plan? (Check with Keon, if we can say anything)

Capability of HIsarna

Timeline (Table) (use reference)

Run year, name

Run Production/total, run aim

Fuel rate/reductant rate

Advantages

capability

SRV/Cyclone (prereduction in liquid state, add to the process efficiency)

no sinter/no coke

Flexibility for new raw materials

Oxygen injection/CO2 purity/capture opportunity

Advantages over peers and blast furnace

How is our emission level compare to BF and alternate Iron making technologies? SOx NOx, Particle? Table?

Need of a process descriptive model

HIsarna is a new Smelting reduction process

Need optimization

Process understanding required /expected behaviour after scale up

CO2 issue/climate agreement

HIsarna process descriptive model

General explanation, 7 zones/Figure

Main process

Secondary process

  1. Method

Para: IRMA

What is IRMA explain

How it is used in the current paper

Para: Run

Data selection method

For validation

Conclusion

Modelling box 4 using IRMA

Relating the model with the process data

  1. 1 Steady state run F3.2

4.2 SRV gas analyses and mixer model box 4

Para:CFD

Explanation, how CFD is used in the present study

Para:Explain in detail (zone 1, 2 & 3)

Principal reactions in zone 1, 2 & 3

Para: Explain the assumption of steady state

Para: Example of minimum coal requirement, steady state condition

Para:Importance of C-volatile

Para:Lance angle and Char/

CHAR: Non wetting with slag (reference) and foam breaker (ref)

Para: Effect of droplets/surface area

Metal splash (de-carburisation and oxidation, balance)

Explain the background of the IRMA simulation

Input for box 4 (CO gas from 3 and C(char and vol) from box 5)

IRMA Mixer model(figure) redraw indicative flowsheet

Explain the flow-sheet (with methodology and assumption)

Explain the output and significance

General explanation

  1. Steady state (balance between FeO/F[C]

2.Optimal energy

Skull formation

Gas burned (heatloss)

Process stability

Steady state (data from F3.2)

Lance angle/height

Delta T (Slag-HM)

Char

Optimal box 4 parameters

Brief recap

List of take away points

: Done: Raw material and product flow (Diagram and explanation)

Explanation of box 4, 5, 6

Increase the circularity, (refer-Reclamet, LOCO2Fe(50% Scrap))

In HIsarna emission is at single location, compare to the peers where we have sinter, pellet, coke and SR vessel for emission. GAs treatment can be performed at the single location.

Need of a "detailed process understanding" to predict the process behaviour (in cyclone and SRV)

IRMA papers can be referred

CFD calculation are slow

Conclusion and recommendations: include in conclusion: What need to be done in the future, areas of further development

behaviour of flux and impact on the process

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