Energy-saving rotary kiln


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
t/d

Recovery rate
%

Residual sulfur content
%

Soluble molybdenum

Power
kw

burn-up

kgce/t

remarks

1

φ1.8x28

810

98

0.040.07

 

22

0

metallurgical

2

φ1.8x28

68

98

2.0

>98%

22

50100

Molybdenum chemical

3

φ2.5/2.0x35

1618

98

0.040.07

 

15x2

0

Two stage kiln

4

φ2.5/2.0x35

1216

98

2.0

>98%

15x2

50100

Two stage kiln

The company can according to user needs, design and manufacture ferro molybdenum smelting complete sets of equipment.

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