Coal Dust Injection (CDI) technology for blast furnaces incorporates the use of fine pulverized and dried coal uniformly conveyed in dense flow mode in the several medium of safe nitrogen gas to the blast furnace tuyeres and injected into the furnace at PLC controlled metered rates through special lances. CDI systems consists of:
- Raw coal handling sub system
- Grinding and drying sub system
- Injection sub system
Built-in safety devices
eliminate the hazards of fire and explosion, and total
PLC controlled systems ensure trouble-free inter phase
and integrated operations.
Advantages from use of CDI system include:
- Significant reduction in expensive coke consumption
- Significant improvement in blast furnace productivity
Associates:
BMH Claudius Peters GmbH, Germany
Recent Projects:
Design, supply and installation of two Coal Dust Injection systems in existing Blast Furnace 4 and Blast Furnace 6 at Steel Authority of India Ltd. (SAIL’s) Bokaro and Bhilai Steel Plants respectively having the following brief specifications:
| Parameters | BF-4, Bokaro | BF-6, Bhilai |
| Hot metal production per day | 3000 T/day | 3000 T/day |
| Blast Temperature | 900 – 1000° C | 900 – 1000° C |
| No.of Tuyeres | 20 Nos. | 18 Nos. |
| Blast Pressure | 2.4 to 2.6 atmospheres | 2 to 2.2 atmospheres |