Zinc ppt

4,545 views

Published on

Published in: Engineering, Business, Technology
0 Comments
6 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
4,545
On SlideShare
0
From Embeds
0
Number of Embeds
6
Actions
Shares
0
Downloads
285
Comments
0
Likes
6
Embeds 0
No embeds

No notes for slide

Zinc ppt

  1. 1. Zinc Refining And 1 And Purification BY : - ANIL MAURYA ELECTRICAL & ELECTRONICS ENGINEER
  2. 2. •Chemical Formula :- Zn • Atomic Number :- 30 Introduction • Atomic Number :- 30 •It is bluish white to silvery-gray in colour. • It is hard and brittle at most temperatures. ANIL MAURYA ELECTRICAL & ELECTRONICS ENGINEER 2
  3. 3. History of zinc Zinc was discovered in the metallic form. In 1374, Zinc was discovered & the 8th metal known to man. In 1743, the first Zinc smelter was established in U.K. In India, Hindustan Zinc was established in 1966.In India, Hindustan Zinc was established in 1966. ANIL MAURYA ELECTRICAL & ELECTRONICS ENGINEER 3
  4. 4. Uses Of Zinc 1. As an Anti-Corrosive agent. 2. Process of galvanization, like light posts, metal roofs and car bodies. 3. Also used as an anode material in batteries.3. Also used as an anode material in batteries. 4. Coating to protect iron and steel. 5. ZnO is also used in rubber to protect it from UV radiation. 6. Alloyed Zinc is used in pipes, instruments, hardware and water valves. ANIL MAURYA ELECTRICAL & ELECTRONICS ENGINEER 4
  5. 5. Zinc Production & Reserves Country Production Reserves United states 720 12000 Australia 1450 53000 Bolivia 430 6000 Canada 670 6000 China 3500 42000 India 750 11000India 750 11000 Ireland 350 2000 Kazakhstan 480 16000 Mexico 550 15000 Peru 1520 23000 Other Countries 1580 62000 Total 12000 250000 ANIL MAURYA ELECTRICAL & ELECTRONICS ENGINEER 5 Data is in thousand metric tons.
  6. 6. ANIL MAURYA ELECTRICAL & ELECTRONICS ENGINEER 6 Process figure
  7. 7. Roasting The Fluid Bed Roaster is used in the process zinc sulfide concentrates. Zinc sulfide concentrates is introduced directly into the roaster. Zinc sulfide concentrates is introduced directly into the roaster. Roasted material largely consisting Zinc Oxide(ZnO). ZnS+5/2O2 ZnO + SO4 ANIL MAURYA ELECTRICAL & ELECTRONICS ENGINEER 7
  8. 8. Leaching The Zinc Calcine from the roasting process is fed for leaching process. Continuous pH monitoring is facilitated by submerged pH cells in controlled tanks.cells in controlled tanks. ANIL MAURYA ELECTRICAL & ELECTRONICS ENGINEER 8
  9. 9. Purification Zinc oxide is converted into Zinc Sulphate by adding Zinc Dust. In purification plant metallic impurities such as Cd, Cu, Ni, Co are also removed. ANIL MAURYA ELECTRICAL & ELECTRONICS ENGINEER 9
  10. 10. ElectrolysisIn electrolysis plant Zinc is recovered from Zinc Sulphate. After the purification process Zn is converted in zinc anode and zinc cathode by passing the electric current.cathode by passing the electric current. ANIL MAURYA ELECTRICAL & ELECTRONICS ENGINEER 10
  11. 11. Melting and Casting Automatic System for Melting and Casting are used in making slabs & Jumbos Casting Machine. ANIL MAURYA ELECTRICAL & ELECTRONICS ENGINEER 11
  12. 12. Gas Cleaning The hot dust-laden roaster gas is cooled and dedusted through the Gas Cleaning system. Waste Heat Boiler Hot Electrostatic Precipitator (ESP) Wet Gas Cleaning Cooling De-Dusting SO2 Gas Scrubbing Wet Gas Electrostatic Mist Precipitator (Mist EP)Wet Gas Electrostatic Mist Precipitator (Mist EP) Mercury Removal Zinc Oxide Scrubbing Flue Gas Desulfurization (FGD) ANIL MAURYA ELECTRICAL & ELECTRONICS ENGINEER 12
  13. 13. Sulfuric Acid For the treatment of Sulfur Dioxide (SO2) in the roasting off-gas, by passing through the Gas Drying Tower, the Sulfur Dioxide (SO2) Gas(SO2), cooled and saturated with water vapor, comes in direct contact with concentrated acid. Sulfuric Acid(H2SO4) of this concentration is very hygroscopic (absorbs waters) and the gas is practically free from water vapor after leaving the Drying Tower. ANIL MAURYA ELECTRICAL & ELECTRONICS ENGINEER 13
  14. 14. Application Automotive Buildings and Concentration Industries Hot dip galvanizing Zinc Castings ANIL MAURYA ELECTRICAL & ELECTRONICS ENGINEER 14
  15. 15. Automative Improved coatings have encouraged the development of new application, for example, galvanized steel with a very fine surface finish is used to produced the parts of car bodies that are vulnerable to corrosion.vulnerable to corrosion. ANIL MAURYA ELECTRICAL & ELECTRONICS ENGINEER 15
  16. 16. Zinc Castings Two zinc casting alloys of any commercial significance zinc 4% Aluminum pressure casting alloys with and without 1% Copper. Zinc castings find a range of applications form automobiles to zip fasteners. ANIL MAURYA ELECTRICAL & ELECTRONICS ENGINEER 16
  17. 17. Hot dip galvanizing It in its original form as applied to fabricate steel work is also a growing industry ANIL MAURYA ELECTRICAL & ELECTRONICS ENGINEER 17
  18. 18. ANIL MAURYA ELECTRICAL & ELECTRONICS ENGINEER 18

×