Cold Bonded Carbon Composite Pellets for Utilization of Iron Ore Micro- Fines and Carbon Bearing Fines

1.

Title of Product/Design/Equipment

Cold Bonded Carbon Composite Pellets for Utilization of Iron Ore Micro- Fines and Carbon Bearing Fines

2.

IPR Status

Patent/Abroad IPR Details

Patent Filed

3.

Application/Uses

Iron and steel making

4.

Salient Technical Features including Competing Features

This process produces micro-pellets with high C content which will be used in sintering of iron ore for reduction of coke breeze consumption and in smelting reduction process.The salient feature of the process are as follows:

• This is a cold bonding process, so it is energy efficient. Curing time is very short (5-10 min).
• It utilizes iron ore micro-fines and coal fines or coke fines or carbon containing waste fines in iron making or sintering.
• The micro-pellets provide energy to the sinter bed for reduction in coke breeze consumption. 38-48 % reduction in coke breeze has been found when 38 % blast furnace flue dust containing pellets were mixed with iron ore in sintering(12 kg scale)
• Since it is a composite pellet, it can be reduced faster than normal pellets
• C0₂ in steel plant's waste gas is utilized in strengthening of pellet

5.

Level/Scale of Development

100 kg/ batch micro-pellet making, micro-pellets used in 12 kg sinter pot

6.

Environmental Considerations

No harmful effect on environment, it will decrease C02 emission since, C0₂ will be used in strengthening of micro-pellets

7.

Status of Commercialization

Ready for commercialization

8.

Major Raw Materials to be Utilized

Iron ore for normal sinter mix, iron ore concentrate, non-coking coal, fluxes viz lime stone/lime, dolomite, steel plants solid wastes such as B.F. Flue dust etc.

9.

Major Plant Equipment and Machinery Required

Conventional sintering set-up, pelletization set-up, C02 treatment facility at room temperature, charging facility with existing mixing drum of sintering set-up.

10.

Techno-Economics

Capital cost depends upon scale of plant. All raw materials used are wastes

11.

Technology Package

(a) Process-Know-how, (b) Details of equipment & (c) Quality Assurance Methods. Assistance in up-scaling and setting up the plant on separate terms.