1. Presentation on Gravity Separation Praveen Kumar(70),Shubham Mishra(37),Pawan Kumar(86) NATIONAL INSTITUTE OF TECHNOLOGY JAMSHEDPUR Department of Metallurgical and Materials cience

2. Presentation Outline Defination Principle Applications Advantages Conclusion

3. What is it ? It is a meathod of separation of 2 components of a mixture on the basis of difference in specific weights or specific gravity.

4. Principle The material is lifted by vaccum over an inclined vibrating screen covered deck which results in the material,being suspended in the air,the heavier impurities are left behind on the screen and are discharged from the stone outlet. It works best when there is a large difference in SG in the minerals to be seperated.

5. Factors influencing choice of seperator Conventional Jigs Spirals Pinchued Sluices Centrifugal Jigs Centrifugal concentrators Shaking Tables(wet & dry) Mozeley gravity seperators(MGS)

6. Reasons to assess Gravity Separation To reject barren wastes To pre-concentrate heavy minerals To clean low weight yield bulk concentrates To scavenging plant tailings To generate a precious metal concentrate

7. Precious Metals To precious metals (Au & PGE). Lithophile metals,Rare Earth,Diamond etc. Separation from base metals and gangue. Recovery from tailings. Applications

8. Base Metals(Zn,Pb,Cu) & Lithophile Metals Separation of base metals from gangue,especially carbaonate rocks & marbles Dense media is separation is the preffered processing route for diamond bulk samples

9. Diamonds & Mineral Sands Seperation of ilmenite, rutile &monazite from beach sand. Separation of eudialyte and monzonite from gangue

10. Industrial Minerals Separation of graphite from mica Sepation of muscovite from gangue Separation of kaolinite from muscovite Silica cleaning

11. Capabilities SGS can provide bench scale flowsheet development,pilot scale testing and plant audit and optimisation services,depending on your need s of your project or faculty. Depending the scope of the project,all of our metallurgical facilities offer bench scale & restricted pilot scale testing.

12. Why use gravity separation? Most well-proven and accepted tecnique of concentrating minerals High effieciency and low cost Quickly generate o precious metal concentrate that can be sold into the market Provide better security for small volume high value concentrates. Low capital and operating cost New equipment enhances the range of separations possible

13. Conclusion Due to its low cost capital investment in industrial setup & efficiency as compare to other separation meathod it is far more benificial.Apart from low emissions of toxic waste in the atmosphere and the surroundings it also heips to remove viable or valuable components fom recycling mixture like metal from plastic,rubber from plastic,different grades of plastic.

14. THANK YOU