1 / 12

How Could You Do This To Ores!

How Could You Do This To Ores!. http://classes.mst.edu/ide120/lessons/hardness/materials/st_types.html. Today’s Lesson. Metals in the Ground Extracting Metals from Rocks Design Task Start Ores Formative Task. Metals in the Ground.

otis
Download Presentation

How Could You Do This To Ores!

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. How Could You Do This To Ores! http://classes.mst.edu/ide120/lessons/hardness/materials/st_types.html

  2. Today’s Lesson • Metals in the Ground • Extracting Metals from Rocks • Design Task Start • Ores Formative Task

  3. Metals in the Ground • It might be hard to believe, but oxygen (O) and Silicon (Si) make up around 73% of all elements found in the earth or ground. • That means there is not that much left for the 100 or so other elements found on earth. • Many metals, such as Zn, Cu, Ag, Au, Pb, Pl, Hg, Sn, Cr etc are actually quite scarce and are found in very small amounts

  4. Different Ores • An ore is a rock that normally includes a specific amount of a metal that we want for a specific purpose. • Once an ore is found, the metal needs to be removed from the rock itself which requires a lot of energy • Low grade ores are ores with more metal in them than normal, but are uneconomic to mine at the moment

  5. Ore Names!! • Bauxite contains Aluminium • Cassiterite contains Tin • Chalcocite contains Copper • Chalcopyrite contains Copper • Chromite contains Chromium • Cinnabar contains Mercury • Galena contains Lead • Sphalerite contains Lead • Uranitite contains Uranium

  6. Questions • Read Page 74/75 on Metals in the Earth’s Crust and answer Q 1-8. • Hopefully we will be able to look at some ore samples next semester.

  7. Extracting Metal from Ores • Metals can be removed in different ways. These include: • Native metals being removed from other rocks such as Gold from Quartz • Removing Oxygen from the Ore through reduction • Extracting through Electrolysis (Electricity) • Other methods we will learn about soon (but not in IGCSE!!)

  8. Tables & Ores • Notice the table on Page 77, there is a pattern which is quite normal in Science. • The more reactive the metal, the more difficult it is to remove the metal in elemental form. This is why Sodium and Potassium in elemental form are expensive!! • There is also a general trend in cost. The more reactive the metal, the more expensive to extract it from the ore.

  9. OIL RIG • Remember this OIL RIG • OIL is Oxidation is Loss of Electrons • RIG is Reduction is Gain of Electrons • If a metal gains oxygen, electrons are lost or it’s been oxidized. • If a metal loses oxygen, electrons are gained and it’s been reduced. • Redox reactions is when they both occur in the same reaction. You will learn a lot about this next year – not this year.

  10. Questions • Please read Page 76-77 and answer Q 1-5. • When you have finished, have a quick look at the Silver Nitrate and Copper test tubes from last lesson. • Make sure you do not open the test tubes. • Next activity is on next slide.

  11. Removing Metals from Ores • First Choose an Ore from Below: • Bauxite Al2O3 • Chalcopyrite CuFeS2 • Chromite Fe or MgCr2O4 • Galena PbS • Hematite Fe2O3 • Magnetite Fe3O4 • SphaleriteZnS • UraniniteUO2

  12. Answer Following Questions • Using the internet for research – answer the following questions. Not all answers can be found easily: • What is the metal extracted from your ore • How is your metal extracted or removed from your ore? Explain. • What conditions are needed for the rock to form so there is enough of the metal in the ore? • Name some of the major mines that this ore can be found. • How much of the metal is needed for the ore to be economic? • What are some of the environmental impacts or issues associated with extracting the metal from your ore? • What are the major uses for your metal? • How does the mine dispose of the slurry or left over ore?

More Related