Rocks containing copper compounds (such as copper carbonate) are called ‘copper ore’. Copper is extracted from copper ore by a series of chemical‚ physical‚ and electrochemical processes. Ores can be classed as ‘high grade’ or ‘low grade’ depending on the percentage of copper compounds (e.g. copper carbonate) they contain. After mining‚ the ore is crushed‚ roasted‚ smelted and then electrolysed to extract the copper. Suggested Equipment Boiling tube Samples of different carbonate ores‚ containing
Free Carbon dioxide Bicarbonate
ABSTRACT Title: Extract of Squash Seeds as an Organic Rust Inhibitor Researchers: Aguilar‚ Sandino Michael Angelo Alejo‚ Gymboy‚ Agripa‚ Cyril Ann‚ Baloloy‚ Alyssa Mae‚ Zamudio‚ Catherine Corrosion is the phenomenon of a material as a result of its interaction with its environment‚ which is applied mostly to metals particularly to their reaction with oxygen. Rust inhibitor that when added to liquids decreases the corrosion rates of a material. The researchers proposed for a rust inhibitor
Premium Corrosion Oxygen Metal
Is America headed for an economic collapse? By: John Shepherd America’s collapse Is America headed for an economic collapse? Research indicates the possibility of an economic collapse because of the exorbitant national debt‚ loss of jobs‚ and the falling stock market. History can tell a story that many people overlook. People tend to repeat their mistakes and if we take a look at what is in the past we can predict what the future may hold. In the 1930’s the United States faced an economic
Premium Economics Unemployment United States
A REVIEW PAPER ON MINE FIRE IN INDIA INTRODUCTION The problem of mine fire is as old as the history of the mine. The fires in coal mines are posing great hazard due to its increasing trend in the world and much more so in our country while mining of thick and thin seams under difficult geo-mining conditions. Due to fires in underground as well as surface mines‚ not only a considerable amount of resources is lost‚ but the entire mine environment is badly affected. So long as the fires are restricted
Premium Coal Coal mining
Valdivia‚ in southern Chile and lasted in 7 to 10 minutes. Consequently‚ dozens of islands and countries were affected; and the death toll‚ and monetary costs skyrocketed. Everything has its own reason. As for the Great Chilean Earthquake (or the Valdivia Earthquake)‚ it occurred‚ caused of the release of mechanical stress between the subducting Nazca Plate and the South American Plate. Also‚ as a result of an earthquake‚ an enormous wave of the tsunami affected Southern Chile‚ Hawaii‚ Japan‚ the
Premium Earthquake Tsunami Plate tectonics
Copper Mining in Zambia Norman Mulimbwa Shachile WHUT‚ Luoshi Rd.‚ International students building No.8‚ Wuhan‚ 430070‚ PR China Abstract The mining industry has been the economic and social backbone in Zambia since the first major phase of exploitation of the Copperbelt ’s Cu-CO deposits commenced in the early 1930 ’s. Since that time a wide spectrum of other metalliferous and non-metalliferous resources have been discovered in Zambia and although exploitation of these has been limited‚ they
Free Economics
Coursework 4 Copper Name of student: Alfiya Ospanova Tutorial group: G Copper is one of the earliest elements explored by humanity. Due to the special red shade it was easy to find in ancient times. The metal was named according to place where it was found‚ the Cyprus islands. Copper produced in massive stars and spread in the world as minerals like chalcocite and chalcopyrite (sulfide of copper)‚ azurite and malachite (carbonate of copper)‚ cuprite (oxide of copper). The atomic
Premium Copper Sulfuric acid Oxygen
assignment 1. For April 30‚ 2013 Federal funds rate – 0.13 Federal Reserve discount rate – (Discount window primary credit) - 0.75 For December 23‚ 2005 Federal Reserve– 4.23 Discount rate – 5.35 As we can see from the information above‚ the short-term rates have decreased since the end of 2005 (4.230.13; 5.35 0.75) 2. The schedule of minutes can be found on http://www.federalreserve.gov/monetarypolicy/fomccalendars.htm and the press releases can be found on the News&Events section
Premium Monetary policy Central bank Interest rate
Chilean Workers Gregory Payne BCOM275 October 20‚ 2011 Eric Graves Chilean Workers The devastating news of the 30 Chilean workers trapped in a collapsed copper mine‚ had majority of the world waiting with anticipation as to what is going to be the outcome of these fine young men‚ risking their lives for their country in order to provide for their family. One can’t help to wonder what is going on in these gentlemen minds‚ knowing that they are trapped 300 meters below surface with limited
Free Employment Question Communication
TWO DEPRESSIONS‚ ONE BANKING COLLAPSE Chay Fisher and Christopher Kent Research Discussion Paper 1999-06 June 1999 System Stability Department Reserve Bank of Australia We would like to thank Philip Lowe‚ Marianne Gizycki‚ David Merrett‚ Bryan Fitz-Gibbon‚ David Gruen and Peter Stebbing for helpful suggestions. Thanks to David Merrett and David Pope for early advice and encouragement. Thanks also to Adrian McMahon for help in preparing this document. Any remaining errors are our own.
Premium Great Depression Bank Financial services