\nFe – \u00a0 \u00a0Hematite Fe2<\/sub>O3 ,\u00a0<\/sub>Magnetite Fe3<\/sub>O4 ,\u00a0<\/sub>Iron pyrites FeS2 ,\u00a0<\/sub>Siderite FeCO3<\/sub>
\nCu – \u00a0 Chalcopyrite CuFeS2<\/sub><\/p>\n
Extraction of iron (Blast furnace method)<\/h3>\n
\u2022 Iron ore, coke (as a reducing agent) and limestone (as a slag forming substance) are used as raw materials. The amount of CaCO3<\/sub> used is dependent on the amount of silicate materials in the ore.<\/p>\n \u2022 Hot air is blown in at the bottom. Coke burns producing heat and CO.<\/p>\n C(s) + O2<\/sub>(g)\u00a0\u2192 CO2<\/sub>(g) \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0CO2<\/sub>(g) + C(s)\u00a0\u2192 CO(g) \u2022 The iron(III) oxide is reduced to iron mainly by CO and some by carbon.<\/p>\n \u2022 The molten iron containing 3-4% dissolved carbon forms pig iron. Melting point of the pure iron is 1535 \u00b0C but the melting point of pig iron is at about 1015 \u00b0C, due to the presence of impurities.<\/p>\n \u2022 CaCO3<\/sub> decomposes to CaO and CO2<\/sub> gas. CaO reacts with silicate impurities and forms slag (CaSiO3<\/sub>). Slag is also molten and floats on molten iron into the bottom. Slag protects iron from oxidizing by the air which is blown in the bottom.<\/p>\n \u2022 Pig iron contains 3-4 % of carbon and possibly other impurities such as Si, P, S and Mn.<\/p>\n \u2022 Following reactions are taken place in the temperature range of 700 K – 2000 K. At high temperature (Above 1000 0C) <\/p>\n","protected":false},"excerpt":{"rendered":" Occurrence of d block elements Ti \u00a0– \u00a0 \u00a0Ilmenite FeTiO3 ,\u00a0Rutile TiO2 Fe – \u00a0 \u00a0Hematite Fe2O3 ,\u00a0Magnetite Fe3O4 ,\u00a0Iron pyrites FeS2 ,\u00a0Siderite FeCO3 Cu – \u00a0 Chalcopyrite CuFeS2 Extraction of iron (Blast furnace method) \u2022 Iron ore, coke (as a reducing agent) and limestone (as a slag forming substance) are used as raw materials. […]<\/p>\n","protected":false},"author":842,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[14,1680],"tags":[],"class_list":["post-6059","post","type-post","status-publish","format-standard","hentry","category-chemistry","category-unit-15"],"acf":[],"yoast_head":"\n![](\"http:\/\/notes.tyrocity.com\/wp-content\/uploads\/Iron.png\")
<\/p>\n
\n\u2022 The temperature at the point where air enters is at about 2000 K and at the top is about 700 K.<\/p>\n
\nAt low temperature (Below 1000 0C)
\n3Fe2<\/sub>O3<\/sub>(s) + CO(g) \u2192\u00a02Fe3<\/sub>O4<\/sub>(s) + CO2<\/sub>(g)
\nFe3<\/sub>O4<\/sub>(s) + CO(g) \u2192\u00a03FeO(s) + CO2<\/sub>(g)
\nFeO(s) + CO(g) \u2192\u00a0Fe(l) + CO2<\/sub>(g)
\nCaCO3<\/sub> (s) \u2192\u00a0CaO(s) + CO2<\/sub>(g)<\/p>\n
\n2FeO(s) + C(s) \u2192\u00a02Fe(l) + CO2<\/sub>(g)
\nCO2<\/sub>(g) + C(s) \u2192\u00a02CO(g)
\nCaO(s) + SiO2<\/sub>(s) \u2192\u00a0CaSiO3<\/sub>(slag)
\nCaO(s) + Al2<\/sub>O3<\/sub>(s) \u2192\u00a0Ca(AlO2<\/sub>)2<\/sub>(slag)<\/p>\n