Gravity concentration | Elements and their Classification | Mendeleev's Periodic Table |

Types of Iron Ore

  1. Additional Text. Types of Automation
  2. Industrial enterprises restructuring: the nature and types of
  3. IV. Match these phrases with the types of letters. Give more opening phrases and endings for each type of letter.
  4. Oppositions can be classified into qualitive types
  5. Put all types of questions to the following sentences.
  6. Three Types of Conditional Sentences
Magnetite, magnetic iron ore, Fe3O4 . Magnetite (Fig. 13) is an iron ore that exhibits a high iron content (60 to 70%) and is extensively free from unwanted tramp elements. The gangue is mostly of a siliceous nature (acidic). Iron and oxygen atoms are very closely combined with each other in magnetite, thus making magnetite "difficult to reduce". As the name indicates, magnetite is highly magnetic. Large deposits are found in Sweden, Norway and Russia.  
Hematite, Red Iron Ore. Hematite (Fig. 14) likewise exhibits high Fe contents combined with low levels of phosphorus and sulphur, and a siliceous or clay gangue (acidic). The particular reddish colour is caused by the iron (III) oxide. In this red iron ore, the iron-oxygen compound is looser so that hematite is regarded as "easily reducible". Workable deposits are found in all parts of the world.  


Iron ores | Limonite, Brown Iron Ore, Fe2O3 ·H2O
© um.co.ua - учбові матеріали та реферати