Transformer rectifier for electrowinning in Zinc refinery and smelting plant
Application
The Transformer Rectifier is used for Electrowinning, also called electroextraction, is the electrodeposition of metals from their ores that have been put in solution via a process commonly referred to as leaching. Electrorefining uses a similar process to remove impurities from a metal. Both processes use electroplating on a large scale and are important techniques for the economical and straightforward purification of non-ferrous metals. The resulting metals are said to be electrowon.
Below is reference picture of Zinc electrowinning plant.
Transformer Rectifier for Zinc Electrowinning Technical Data
AC INPUT | |
Three-Phase Supply Voltage | 20kV(example) |
Frequency | 50Hz or 60Hz |
Power Factor Required At Rated Output | >0.9 |
Harmonic THDi and THDv | VTA |
DC OUTPUT | |
Maximum D.C. Current | 20kA (example） |
Maximum D.C. Voltage | 500V (example） |
Voltage Variation Range | 0-100% |
Constant DC Current Control Range | 0-100% |
RECTIFIER | |
Cooling | Water-Cooler(Deionized Water) |
Load | Electrowinning Cell |
Rectifying Elements | Thyristors |
Type of automatic control | Full-digital type,double channel,one work,another one hot standby. |
Rectifying circuit | Three-phase bridge rectifier |
Protection degree | IP50 |
| Number of rectifier cubicles | 1 or 2 |
| Number of pulses | 12 pulse(suggested) |
| Accuracy | Within +/- 0.5% of the rated DC current |
| Continuous with n elements in operation | Yes |
Continuous with “n-1” elements in operation | Yes |
| Quantity of thyristors | 48 Nos.(example) |
| Quantity of Fast action fuses | 48 Nos.(example) |
| Current safety factor | >3 |
| Voltage safety factor | >3 |
| Type and mode of control | constant current |
| HMI | Touch panel |
| Paint finish | RAL7035 or custom design |
| Bus bar material | Copper |
| Estimated outline size | L*W*H: 3400*1200*2200(mm) |
| Estimated weight | 3 tons |
Protections | One thyristor fault per arm alarm, two thyristor fault on same arm trip. One fuse fault per arm alarm, two fuses fault on same arm trip. DM water very high temp. Trip DM water flow low, alarm DM water flow very low, trip Mixed cartridge and filter is provided to maintain the conductivity of DM water Interlocks through DCS Emergency trip push button station Earthing fault monitoring Surge arrestor Thyristor RC snubber Fast action fuses Phase loss Input over/under voltage Short circuit Output current limit Bus bar temperature Rectifier over heat Output over voltage Output over current Cooling water low pressure Cooling water high temperature Insulation protection And others required by purchaser |
TRANSFORMERS | |
Rated primary voltage UL | 20K V ±10%(example) |
Rated frequency | 50 Hz or 60Hz |
Rated power | 13220kVA(example) |
Vector group | Ya0-Dz，d0 6 y11 5 |
Rated primary current | 381.5A |
Rated secondary current | 4079*2*2A |
Secondary phase voltages | 231.4~462.9V(star connection) 233.9~467.7V(delta connection) |
Connections | Three-phase bridge with in--phase counter connection |
Cooling method | OFWF |
Winding material | Copper |
Short circuit Impedance | Approx. 8.2% |
Oil surface temperature rise | 35K |
| Overload ability | 150% for 1 minute once in 24 hrs, 110% long time continuous running |
Insulation class | A |
Outline size | L*W*H: 4200*2900*3500(mm) |
Heat exchanger size | L*W*H: 2400*1100*1800(mm) |
Design life span | Longer than 30 years |
Green Power Rectifier Advantages
◆ 1+1 Digital Controller, Dual channel hot backup controller
◆ Combined with the application process and technical parameters, optimize main circuit design, ferromagnetic calculation and structure design to effectively reduce EMI, loss and improve efficiency
◆ Adaptive filtering of synchronous signal
◆ Optical fiber trigger, small optical delay, good synchronization effect, strong anti-interference ability
◆ Self developed DSP digital control, fast response, high control accuracy, high reliability, easy for DCS networking
◆ High reliability, verified by export application
◆ Multiple parallel thyristors are considered in the structural design, with good current sharing effect
◆ Anti corrosion treatment, stainless steel water pipes and screws
◆ International level process standard
◆ Thyristor N+1 redudancy
◆ Multi-pulse configurations available
◆ Grounding insulation detection available
◆ Design to local environment, altitude and cooling conditions with all cooling system types available
◆ Air cooling rectifier availalbe in minus Celsius degree temperature area to avoid water freezing, have experience
◆ Touch panel intelligent control
High Power Transformer Rectifier Reference Picture
Contact us
Email: alice@bjgreenpower.com
Whatsapp: +86 13810151476
Wechat: 65044167
Will respond you within 1 hour during 8:00 a.m.-11:00 p.m Beijing time
Looking for transformer rectifier for electrowinning in zinc refinery and smelting plant? Green Power Technology is one of the professional manufacturers and suppliers. We have been dedicated to this field for over 20 years and already exported products to India, USA, Germany, etc. Equipped with a productive factory, we warmly welcome you to buy our high quality products made in China at competitive price or try our customized service.
