Separation of Scrap Iron
Waste materials supplied to factories contain a number of scrap metals including iron. So,in factories, scrap iron is separated from the heap of waste materials by using big electromagnets fitted to a crane.(A magnet which works with an electric current is called an electromagnet). When a crane fitted with a powerful electromagnet is lowered on to the heap of waste materials, then the scrap iron objects present in the heap cling to the electromagnet (see Figure 57). The crane is then moved up and away to drop these scrap iron objects at a separate place. In this way, scrap iron is separated from the heap of waste materials.
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Matter in Our Surroundings - Notes
2. 7. Metals are Solids at the Room Temperature
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4. 3. Non-Metals are Bad Conductors of Heat and Electricity.
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8. 11. Non-Metals Have Many Different Colours.
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9. 7. Non-Metals may be Solid, Liquid or Gases at the Room Temperature.
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15. 8. Metals Generally Have High Melting Points and Boiling Points.
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19. 8. Non-Metals Have Comparatively Low Melting Points and Boiling Points
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23. Chemical Formula for daily use material
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24. 1. Non-Metals are Not Malleable. Non-Metals are Brittle.
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25. To Study the Properties of a Suspension
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26. Effect of Temperature and Pressure on Solubility
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31. Pure Substances : Elements and Compounds
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32. 3. Metals are Good Conductors of Heat and Electricity.
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36. 1. Separation by a Suitable Solvent
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37. 4. Non-Metals are Not Lustrous (Not Shiny). They are Dull in Appearance.
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38. Solutions, Suspensions And Colloids
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46. Differences Between Mixtures and Compounds
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49. To Separate the Salt-Water Mixture (or Salt-Solution)
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