Raw Materials of HC FeCr Production

1.Types of raw materials:

a. Chrome ore, Cr₂O₃≥40%, Cr₂0₃/FeO≥2.5，S＜0.05%, P＜0.07%, MgO and Al₂O₃ should not too much higher, Size 10-70mm.

Silica ore: SiO2＞97 %: Al₂O₃＜1%: Stable in heat, and without Mud, size 20-80 mm.

Feeding size: large size furnace 30~100 mm; small size furnace 25~60 mm

b.fix carbon of carbon deoxidizer＞84%:ash＜15%:S＜0.6%, feeding size:3~20 mm。

2Raw materials consumption(Cr 66% around):

Chrome ore 1880~2200 kg/t

Coke 410~500 kg/t

Silica 85~95 kg/t

Electrode 20~25 kg/t

Power consumption 2800~3100 kw.h/t

Power consumption of other main equipments: 400 kw/t around

3.Main operation index:

Daily production: 92 T

Unit power consumption: 3000~3400Kw.h

Qualified rate : ＞92~95%

Cos∮: 0.81

4.Power consumption:

Melting process 2800~3100 kw.h/t

Cooling process 55 kw.h/t around

Smoke 250 kw.h/t

5.Gas cleaning:

Gas temperature 300~800℃(central area)

~200℃ (tapping area)

Gas density 3~5 g/Nm3 (central area)

1.5 g/Nm3 (tapping area)