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Energy-saving rotary kiln

basic information
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Details

 

product description

 

The energy-saving rotary kiln is characterized by the ability to perform an autothermal reaction during the roasting of the sulfide ore. The heat released by the roasting can fully satisfy the heat required for the next process and does not generate a large amount of flue gas. Based on the experiment of oxidizing roasting mechanism of sulfide ore, we proposed an optimal design scheme for the internal heating rotary kiln, which adopted a number of patented technologies, increased the kiln heat exchange air supply device, the cylinder expansion device, and adopted a novel slip ring. Structural design of power supply devices. It has high performance, high efficiency, zero energy consumption and other performance advantages unmatched by ordinary rotary kiln.

 


 

Technical performance and characteristics

 

Carbon-free roasting

Oxidation self-heating roasting of molybdenum concentrate, zinc sulfide ore, copper sulfide ore, pyrite, etc., achieving good economic and environmental benefits during operation. The amount of rotary kiln exhaust gas is reduced by about 50%, which inhibits the dilution effect of SO2, so that subsequent The acid production process is easier to implement.

 

Optimize design and improve performance

The optimized design of the internal heat self-heating roasting rotary kiln increases the heat exchange and air supply device of the kiln body, the thermal compensation device inside the cylinder, and the thermal insulation device inside the cylinder. It can save energy by >50% when used in chemical molybdenum oxide roasting, and the oxidizing atmosphere is good. The output is 15% higher than that of ordinary rotary kiln.

 

Fast oxidation reaction, good desulfurization effect

Because the technology of this technology is more sufficient for the roasting of molybdenum concentrate, the oxidation of molybdenum concentrate is faster, and the desulfurization effect of the product is better. The sulfur content of the product is about 0.07%, which is far lower than the domestic sulfur content of 0.1%. standard.

 

Long service life, good working environment

A thermal expansion device is arranged inside the kiln body to compensate for the thermal expansion of the kiln body and ensure the service life of the kiln body. The kiln body is made of an internal thermal insulation device to reduce heat dissipation, improve overall thermal efficiency, and improve the labor environment in the workshop.

 


 

working principle

 

The purpose of oxidizing roasting of molybdenum concentrate is to separate molybdenum from sulfur in molybdenum disulfide and convert MoS2 into MoO2 or MoO3 at high temperature. The roasting of molybdenum concentrate is a significant exothermic reaction and can be self-heating. The calcination process does not require the consumption of thermal energy and should not produce a large amount of flue gas. The principle of energy-saving rotary kiln is to use the molybdenum concentrate roasting reaction to exotherm heat recovery and maintain the self-heating reaction (no external heating source is required). The thermodynamic trend and heat balance potential of molybdenum concentrate roasting are very obvious, and the heat released by molybdenum concentrate oxidation is added. Fully recycled, it is possible to achieve zero thermal energy roasting.

 


 

Product atlas

 

 


 

Technical Parameters

 

Serial number

structure size

Yield

t/d

Recovery rate

%

Residual sulfur

%

Molybdenum

power
kw

Fuel consumption
kgce/t

Remarks

1

φ1.8
x28

8-10

≥98

0.04-0.07

 

22

0

Metallurgical

2

φ1.8
x28

6-8

≥98

≤2.0

>98%

22

50-100

Molybdenum chemical

3

φ2.5/2.0
x35

16-18

≥98

0.04-0.07

 

15x2

0

Two-stage kiln

4

φ2.5/2.0
x35

12-16

≥98

≤2.0

>98%

15x2

50-100

Two-stage kiln

 

 


 


 

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