Recycling Hazardous Waste Production Line for waste management solutions
EAF dust is a byproduct generated during the recycling of scrap iron in electric arc furnaces (EAF). It is considered industrial waste and contains heavy metals, as well as valuable metals like zinc and iron powder.
During the EAF process, the high temperatures required to melt the feed material produce a zinc byproduct (EAF dust) that leaves the furnace along with the off-gases. The gases are filtered and the EAF dust is collected in bag houses.
The EAF dust waste steam is considered a hazardous material due to the potential for the heavy metals to leach into the ground, contaminating ground water and sewage systems.
The EAF dust generated by steel mills can be recycled in an economically viable way using the Waelz Kiln technology. The recycling process is part of the larger steel industry loop that allows the reuse of two important natural resources - zinc and iron.
Kiln Technical Details
|
Specification Model
(m) |
The size of the kiln
|
Yield
(t/h) |
Speed
(r/min) |
Electrical power (kw)
|
Weight
(t) |
Remarks
|
||
|
Diameter
(m) |
Length
(m) |
Gradient
(%) |
||||||
|
φ1.4×33
|
1.4
|
33
|
3
|
0.9-1.3
|
0.39-3.96
|
18.5
|
47.5
|
----
|
|
φ1.6×36
|
1.6
|
36
|
4
|
1.2-1.9
|
0.26-2.63
|
22
|
52
|
----
|
|
φ1.8×45
|
1.8
|
45
|
4
|
1.9-2.4
|
0.16-1.62
|
30
|
78.2
|
----
|
|
φ1.9×39
|
1.9
|
39
|
4
|
1.65-3
|
0.29-2.93
|
30
|
77.59
|
----
|
|
φ2.0×40
|
2
|
40
|
3
|
2.5-4
|
0.23-2.26
|
37
|
119.1
|
----
|
|
φ2.2×45
|
2.2
|
45
|
3.5
|
3.4-5.4
|
0.21-2.44
|
45
|
128.3
|
----
|
|
φ2.5×40
|
2.5
|
40
|
3.5
|
9.0-10.5
|
0.44-2.44
|
55
|
149.61
|
----
|
|
φ2.5×50
|
2.5
|
50
|
3
|
6.25-7.4
|
0.62-1.86
|
55
|
187.37
|
----
|
|
φ2.5×54
|
2.5
|
54
|
3.5
|
6.9-8.5
|
0.48-1.45
|
55
|
196.29
|
----
|
|
φ2.7×42
|
2.7
|
42
|
3.5
|
10.0-11.0
|
0.10-1.52
|
55
|
198.5
|
----
|
|
φ2.8×44
|
2.8
|
44
|
3.5
|
12.5-13.5
|
0.437-2.18
|
55
|
201.58
|
Preheater kiln
|
|
φ3.0×45
|
3
|
45
|
3.5
|
12.8-14.5
|
0.5-2.47
|
75
|
210.94
|
----
|
|
φ3.0×48
|
3
|
48
|
3.5
|
25.6-29.3
|
0.6-3.48
|
100
|
237
|
|
|
φ3.0×60
|
3
|
60
|
3.5
|
12.3-14.1
|
0.3-2
|
100
|
310
|
----
|
|
φ3.2×50
|
3.2
|
50
|
4
|
40.5-42
|
0.6-3
|
125
|
278
|
|
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