COPPER, THE STORY
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Transcript of COPPER, THE STORY
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COPPER, COPPER, THE STORYTHE STORY
BY KATY NUNN &
CHRIS NEWBOLD
SALTLAKE CITY COPPER MINE
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SMELTER
CONCENTRATOR
PIT CRUSHER
ELECROLYTIC REFINING
COPPERCOPPER
OPEN PIT
WASTE CARRIED VIA PIPELINE
IRON RICH SLAG & H2SO4
GOLD, SILVER AND PLATINUM
THE FLOW CHART SHOWS A
SIMPLIFIED
MODEL OF COPPER
PRODUCTION
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SMELTER
CONCENTRATOR
PIT CRUSHER
ELECROLYTIC REFINING
COPPERCOPPER
OPEN PIT
WASTE CARRIED VIA PIPELINE
IRON RICH SLAG & H2SO4
GOLD, SILVER AND PLATINUM
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BINGHAM COPPER MINE
4Km
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SMELTER
CONCENTRATOR
PIT CRUSHER
ELECROLYTIC REFINING
COPPERCOPPER
OPEN PIT
WASTE CARRIED VIA PIPELINE
IRON RICH SLAG & H2SO4
GOLD, SILVER AND PLATINUM
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THE PIT CRUSHERTHE PIT CRUSHER
FROM AN OPEN PIT AROUND 4km DIAMETER AND 1.2km DEEP
COPPER ORE IS EXTRACTED USING THE METHOD
OF EITHER DRILLING OR USING EXPLOSIVES IN THE ROCK WALL.
EACH BATCH OF COPPER ORE THAT IS EXTRACTED IS ANALYSED TO FIND WHETHER THE ORE IS WORTH
PROCCESING.
THEN AROUND 150 000 TONNES150 000 TONNES OF COPPER
A DAY IS THEN FED INTO THE PIT CRUSHER. IN CONTRAST
260 000 TONNES260 000 TONNES OF ROCK ARE WASTED EACH DAY.
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THE PIT CRUSHERTHE PIT CRUSHER
THE COPPER IN THE CRUSHER IS ONLY AROUND
0.6% COPPER. THIS IS VERY POOR COMPARED TO
LATER IN THE PRODUCTION. WHEN THE COPPER HAS
BEEN CRUSHED IN THE PIT CRUSHER IT IS CARRIED
ALONG A 8KM CONVEYOR BELT TO THE NEXT STAGE IN
THE PROCESS OF COPPER PRODUCTION.
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SMELTER
CONCENTRATOR
PIT CRUSHER
ELECROLYTIC REFINING
COPPERCOPPER
OPEN PIT
WASTE CARRIED VIA PIPELINE
IRON RICH SLAG & H2SO4
GOLD, SILVER AND PLATINUM
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THE CONCENTRATORTHE CONCENTRATOR
THIS PROCESS IS DONE BY USING A METHOD CALLED FROTH FLOTATION. FROTH FLOTATION. THIS HAPPENS WHEN A CHEMICAL CALLED A COLLECTOR A COLLECTOR IS ADDED. THIS BINDS TO THE
TYPE OF MINERALS CALLED CHALCOPYRITE. THIS IS A CHALCOPYRITE. THIS IS A CHEMICAL WHICH REPELS WATER. WHEN THE CHEMICAL WHICH REPELS WATER. WHEN THE CONTENTS OF THE CRUSHER IS PUT INTO THE CONTENTS OF THE CRUSHER IS PUT INTO THE
CONCENTRATOR, THE WATER REPELLING MINERALS. CONCENTRATOR, THE WATER REPELLING MINERALS. THIUS MEANS THAT THE COPPER CAN EASILY BE THIUS MEANS THAT THE COPPER CAN EASILY BE
EXTRACTED FROM THE CONCENTRATOR.EXTRACTED FROM THE CONCENTRATOR.
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THE MINERALS ARETHE MINERALS ARE NOW 30% COPPER. THIS IS ANNOW 30% COPPER. THIS IS AN
INCREASEINCREASE
OF OF
AROUND 50 TIMES COMPARED TO THE PIT CRUSHERAROUND 50 TIMES COMPARED TO THE PIT CRUSHER
Froth flotation in industry
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SMELTER
CONCENTRATOR
PIT CRUSHER
ELECROLYTIC REFINING
COPPERCOPPER
OPEN PIT
WASTE CARRIED VIA PIPELINE
IRON RICH SLAG & H2SO4
GOLD, SILVER AND PLATINUM
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SmeltingSmelting
Dust and hot gases for heating
Oxygen - enriched air
Copper matte (Cu2S)
Slag (iron oxides and sulphides are converted by silica)
Chalcopyrite concentrate and silica
Cu2S(l) + O2(g) 2Cu(l) + SO2(g)
Heated reaction shaft
Blown with air
Sulphur dioxide converted to sulphuric acidBlister copper,
99% pure
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SMELTER
CONCENTRATOR
PIT CRUSHER
ELECROLYTIC REFINING
COPPERCOPPER
OPEN PIT
WASTE CARRIED VIA PIPELINE
IRON RICH SLAG & H2SO4
GOLD, SILVER AND PLATINUM
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Electrolytic Refining
Positive, • Made of impure copper ( 99.4%) • Cu Cu 2+ + 2e- (oxidation)• Copper dissolves from here
+ + +_ __
Electrolyte: warm solution of copper(11)sulphate and sulphuric acid
Negative,• Made of pure copper or stainless steel• Cu 2+ + 2e- Cu (reduction)• Copper deposits here ( 99.98% pure)
It takes about two weeks for about 120kg of copper to be deposited.Negative electrodes are washed.Valuable impurities such as silver and gold are collected from the sludge.
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SMELTER
CONCENTRATOR
PIT CRUSHER
ELECROLYTIC REFINING
COPPERCOPPER
OPEN PIT
WASTE CARRIED VIA PIPELINE
IRON RICH SLAG & H2SO4
GOLD, SILVER AND PLATINUM
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WE NOW HAVE COPPER ATA PURITY OF
99.9%