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99.998% Cd vacuum distillation technology

Under normal pressure, the boiling point of cadmium is only 770℃. It can meet the requirements of the process by atmospheric distillation. However, the atmospheric pressure distillation furnace is positive pressure.


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  • PRODUCT DESCRIPTION
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Under normal pressure, the boiling point of cadmium is only 770℃. It can meet the requirements of the process by atmospheric distillation. However, the atmospheric pressure distillation furnace is positive pressure. Once the furnace leaks, the cadmium vapor will diffuse in the working environment under uncontrollable conditions. In the case of serious cadmium poisoning and environmental pollution, it also causes fires; vacuum distillation is operated under vacuum under pressure, once the furnace loses pressure, cadmium will stop volatilizing and cadmium vapor leakage and a series of subsequent problems can be avoided. Therefore, the method of vacuum distillation is selected for crude cadmium distillation.


The crude cadmium is melted and vaporized under vacuum conditions of 570-590℃ and 50 Pa, and then partially refluxed and condensed. The pure cadmium vapor is condensed at 450℃to obtain refined cadmium with a cadmium content of 99.998%, and continuous production can be achieved.


Process flow:

微信图片_20240729163509.png

Sponge Cd High purity Cd production process flow

 

Introduction of crude cadmium vacuum distillation furnace:

1. Multi-stage reflow is used to achieve high-precision separation of cadmium and impurities.

2. The silicon carbon rod is selected as the electric heating element, which is convenient to replace.

3. The furnace part adopts Q235 steel, the furnace body adopts Q345R steel, and its designed service life is to produce 3,000 tons of refined cadmium.

4, equipped with a weighing system, can accurately confirm the weight of the material in the furnace, reflecting the working conditions of the vacuum distillation furnace.


Vacuum distillation furnace technical parameters

No.

Item

Technical parameters

1

Capacity

20ton

2

Effective volume

1.5m3

3

Material

Q235 & Q345R

4

Model

2300×2300×4000(mm)

5

Feed material

Crude Cd liquid

6

Temperature control

≤±5℃

7

Feed type

Continuous feeding

8

Output type

Automatic continuous discharge

9

Discharge temperature

450℃

10

Off-gas volume

3000Nm3/month

11

Energy consumption

750kwh/ton

12

Feeding type

Silicon carbon rod resistance heating

13

Working temperature

600℃

14

Working pressure

50pa

15

Working way

continuous

16

Power

216kw

17

Service life

 3000ton 99.998% Cd ingot

18

Capacity

5t/8hours

19

Brand

MDT


Applicable customer type: 

lead and zinc smelter


Applicable raw material range: 

98% crude cadmium


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  • Fax

    Fax

    Fax: +86 731 5839 2299

  • Tel

    Tel

    Tel: +86 731 8416 4223 ex.805

  • Mobile/whatsApp

    Mobile/whatsApp

    Mobile/whatsApp: +86 13574109968

  • Email

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    Email: sharon@powben.com

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    Add: Room1203, Building No. 13, North area, International Enterprise Center, Yuhua District, Changsha, Hunan Province, China

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