High purity tellurium production line in mining and metallurgy industry
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- Supplier: Hunan Chmm Metallurgy Engineering Co. Ltd.
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Product Overview
Description
Product Description
High-purity Tellurium Production Line
1.Brief Introduction
The substance of the tellurium electrodeposition is using the different deposition potential of all kinds of metal to separate the impurity. Fill in the purified Sodium tellurite liquid to the electrolytic cell and also fill in the stainless steel anode/cathode plate, under the DC effect, the cathode separates out the tellurium and OH- in the anode plate discharging that separates the oxygen. The electrolysis main control the impurities Pb, Se leaching-out in the cathode plate, when the tellurium density is lower whereas the electric current density is higher, the deposition potential of Pb, Se is close to the tellurium, Pb, Se is separated from the cathode plate. It is necessary to deep removal Pb, Se before electrolysis. Tellurium is separated out by the electrolysis, that result in high alkali concentration, when the anode is supersaturated and separated out, the covering surface making the voltage rise in the tank, which results in the impurities separated out. The 1st electrolysis can obtain the electro-tellurium quality about 99.998%(4N)
Picture 1 Electro-refined Tellurium system
Vacuum distillation technology is using the different vaporization and condensing characteristics of different metal to achieve the metal purification and each alloy components separation. This is no pollution or less pollution to the environment during the whole process, short technologic process and high metal recovery rate, small land occupation, less consumption and good benefits. The vapor pressure of Tellurium is high, by using the vapor pressure difference between other impurities, make use of the vacuum distillation----segmented condensation to obtain the high purity Tellurium, the used raw material is electro-Tellurium or metallic Tellurium of Carbon reduction, generally, can get 5N metallic Tellurium product.
Picture 2 Tellurium Vacuum purification system
Due to the poor effective of distillation purification to Se,S2, If want to continuous obtain more high-purity metallic Tellurium, that need melting the metallic Tellurium, keep temperature 480~520 ℃, with hydrogen, maintain 4~8h, Se containing Tellurium can reduce to 1×10-6%, hydrogenation reaction also have similar effective to the desulfuration, the sulphur can reduce to 1×10-5%, H2Se is able to decomposition under the high temperature, not good for the deeply selenium off, the tail gas is absorbed and discharged by the alkali liquid. By adopting the distillation-hydrogenation selenium off technology, can purify the 4N Tellurium to 6N.
2. Features
(1)Advanced technology
(2)Simple process
(3)High automation
(4)Easy operation
(5)High product quality
(6)No pollution to the environment
(7)Multi stage hating, multi stage purification structure
(8)High capacity of single furnace
(9)High vacuum degree
3.Technical Index.
Table 1. Tellurium Electro-refined Key Technical Index.
Item | Name | Index. |
1 |
The main components of the electrolyte in the tank | Te180~220 g/L,NaOH80~120 g/L,Se≤ 0.3 g/L,Cu≤0.003 g/L,Pb≤0.003 g/L |
2 |
Electro-temperature | 20 ℃~30 ℃ |
3 |
Current density | 50 A/m2 |
4 |
Tank voltage | 1.5 V~2.5 V |
5 |
Current strength | 50 A~80 A |
6 |
Same polar distance | 110 mm |
7 |
SS Anode plate specification dimension | 430 mm×370 mm×5 mm |
8 |
SS Cathode plate specification dimension | 450 mm×390 mm×5 mm |
9 |
Electro-cycle | ≥15 d |
10 |
The anode/cathode plate quantity in each tank | 7/6 pieces |
11 |
Electro-Tellurium | ≥99.998% |
Table 2 Electro-Tellurium Vacuum Distillation Key Technical index.
Item | Name | Index |
1 |
Distillation temperature | 530~600 ℃ |
2 |
Condensation temperature | 300~400 ℃ |
3 |
Vacuum degree | 4~100 Pa |
4 |
Vacuum Tellurium | ≥99.999% |
5 |
Capacity of single furnace | 20 kg |
Table 3 Vacuum Tellurium Hydrogenated Key Technical Index
Item | Name | Index |
1 |
Hydrogenated temperature | 480~520 ℃ |
2 |
Hydrogenated time | 4~8 h |
3 |
Selenium removal effect | 1×10-6% |
4 |
Sulfur removal effect | 1×10-5% |
5 |
Hydrogenated Tellurium | 6N |
Company Information
China has ranked as the world’s largest producer of nonferrous metals with its fast economy growth over the last two decades. After continuously making efforts on tackling key technological problems and accumulating a wealth of experiences in practice, now CHMM are delight and ready to share the CHINESSE EXPERIENCE, COST-EFFECTIVE PRODUCTS AND SERIVCES with all friends in nonferrous beneficiation and metallurgy industry all over the world.
CHMM is providing the most advanced technology and services for sustainable use of nonferrous resources of earth, mainly to provide energy saving, environmental protection, high quality and efficient producing technology, equipment and services for the Copper, Lead, Zinc, and Tin and other nonferrous smelting industry.
CHMM provides extensive and flexible business cooperation models for domestic and overseas customers, including research, design, equipment supply, installation, commissioning, training, test run and operation.
Packaging & Shipping
Packaging Details: vacuum distillation furnace packing:Plastic wrapping film and wooden pallets
- Port: Shenzhen,Guangzhou or Shanghai
Our Services
Pre-Sales Service
* Inquiry and consulting support.
* Factory visit support
* Sample testing support
After-Sales Service
* Training how to install the furnace, training how to use the furnace.
* Engineers available to service machinery overseas.
contact details
Please kindly contact us at below infomation if you have any demand.
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