Energy-saving rotary kiln
Published:
2023-03-07 08:59
Source:
Energy-saving rotary kiln is a new type of energy-saving roasting equipment according to the characteristics of the sulfide ore roasting process can be self-heating reaction, after repeated production practice to explore and develop, this set of equipment is mainly composed of kiln head, kiln tail ash box, rolling ring, retaining wheel device, cylinder and cylinder insulation, heat exchange air supply device, transmission device. It has the characteristics of low burn-up and high yield, which changes the traditional production process of sulfide ore roasting. The energy-saving rotary kiln is mainly used in the oxidation and self-heating roasting of molybdenum concentrate, zinc sulfide ore, copper sulfide ore and pyrite.
Working principle (taking oxidation roasting of molybdenum concentrate as an example) :
The purpose of oxidation roasting of molybdate concentrate is to separate the sulfur from molybdenum disulfide. The total reaction equation is as follows:
MoS2 + 3.5O2 = MOO3 + 2SO2 +995.1J
According to the above equation, the oxidation roasting of molybdate concentrate is an irreversible exothermic reaction, and the heat released is enough to ensure the spontaneous reaction. In the normal production stage, the self-heating reaction roasting can be carried out only after starting heating to form a stable roasting temperature zone in the rotary kiln. At the same time, the external heat source is eliminated to achieve the purpose of saving heat energy.
Technical and economic indexes (taking oxidation roasting of molybdenum concentrate as an example) :
|
Serial number |
Structural dimension |
yield |
Recovery rate |
Residual sulfur content |
Soluble molybdenum |
Power |
burn-up kgce/t |
remarks |
|
1 |
φ1.8x28 |
8—10 |
≥98 |
0.04—0.07 |
|
22 |
0 |
metallurgical |
|
2 |
φ1.8x28 |
6—8 |
≥98 |
≤2.0 |
>98% |
22 |
50—100 |
Molybdenum chemical |
|
3 |
φ2.5/2.0x35 |
16—18 |
≥98 |
0.04—0.07 |
|
15x2 |
0 |
Two stage kiln |
|
4 |
φ2.5/2.0x35 |
12—16 |
≥98 |
≤2.0 |
>98% |
15x2 |
50—100 |
Two stage kiln |
The company can according to user needs, design and manufacture ferro molybdenum smelting complete sets of equipment.
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