Patthar Se Metal Tak 🏭
Zyadatar metals prakriti mein shuddh nahi milti — wo compounds ke roop mein patthar ke andar chhupi hoti hain. Unhe nikaalne, saaf karne aur istemal layak banane ki poori prakriya ko metallurgy kehte hain.
📌 Minerals: Prithvi mein maujood wo prakritik padarth jinme metal (dhaatu) ke compounds
hote hain.
📌 Ores (ayask): Wo minerals jinse metal nikalna faydemand
(economical) ho.
💡 Har ore ek mineral hai, par har mineral ore nahi hota.
| Metal | Mukhya ore | Formula |
|---|---|---|
| Loha (Iron) | Haematite | Fe₂O₃ |
| Aluminium | Bauxite | Al₂O₃·2H₂O |
| Zinc | Zinc blende | ZnS |
| Copper | Copper pyrites | CuFeS₂ |
| Mercury | Cinnabar | HgS |
🪜 Extraction Ke 4 Bade Steps
Step 1 — Concentration (Enrichment)
Ore ke saath mitti-patthar (gangue) mila hota hai. Use hataakar ore ko saaf karna. Iske tareeke: hand-picking, washing, froth flotation (sulphide ores ke liye), magnetic separation.
Step 2 — Ore Ko Oxide Mein Badalna
Metal nikaalna oxide se sabse aasaan hai, isliye pehle ore ko oxide banate hain:
🔥 Roasting — sulphide ore ko hawa (oxygen) ki maujoodgi mein tez garam
karna:
2ZnS + 3O₂ → 2ZnO + 2SO₂
🔥 Calcination — carbonate ore ko hawa ki
anupasthiti (kami) mein garam karna:
ZnCO₃ → ZnO + CO₂
🧠 Yaad rakhne ki trick: RoaSting = Sulphide. CalCination = Carbonate. Bas!
Step 3 — Reduction (Metal Nikaalna)
Ab oxide se oxygen hataakar shuddh metal nikalti hai. Tareeka metal ki reactivity par depend karta hai:
| Reactivity | Metal | Tareeka |
|---|---|---|
| Sabse zyada (K, Na, Ca, Mg, Al) | Upar wali | Electrolysis — pighle hue ore mein bijli guzaarna |
| Madhyam (Zn, Fe, Pb, Cu) | Beech wali | Carbon (coke) se reduction |
| Sabse kam (Hg, Ag, Au) | Neeche wali | Sirf garam karne se hi metal alag ho jaati hai |
✔ Examples
Carbon se reduction: ZnO + C → Zn + CO
Electrolysis (Al): 2Al₂O₃ → 4Al + 3O₂ (pighle Al₂O₃ mein bijli)
Sirf garam karke (Hg): 2HgS + 3O₂ → 2HgO + 2SO₂, phir 2HgO → 2Hg + O₂
🔥 Thermite se reduction: Kabhi-kabhi carbon ki jagah aluminium ka istemal hota hai
(kyunki wo zyada reactive hai):
Fe₂O₃ + 2Al → 2Fe + Al₂O₃ + garmi — wahi thermite reaction (abhikriya) jo railway patri jodne
mein kaam aata hai!
Step 4 — Refining (Shuddhikaran)
Nikli hui metal mein abhi bhi thodi milaawat hoti hai. Sabse aam tareeka hai electrolytic refining:
⚡ Anode: ashuddh (impure) metal | Cathode: shuddh metal ki patli
patti | Electrolyte: us metal ke salt ka ghol
Bijli chalane par anode se metal ghulti hai aur cathode par shuddh jam jaati hai.
Milaawat neeche anode mud ke roop mein baith jaati hai — jisme aksar keemti sona-chandi
milti hai!
🇮🇳 India Ki Metal Kahani
Odisha, Jharkhand aur Chhattisgarh Bharat ke sabse bade iron ore bhandaar hain, aur Odisha-Gujarat mein bauxite. Jamshedpur (TATA Steel, 1907) Bharat ka pehla bada steel plant tha. Aaj Bharat duniya ka doosra sabse bada steel utpadak hai. Aur Zawar (Rajasthan) ki zinc khaanein duniya ki sabse purani zinc smelting sites mein se hain — wahan 800 saal pehle hi zinc nikaalne ki takneek thi, jab baaki duniya ko pata bhi nahi tha!
🧠 Apne Aap Ko Test Karo
🏭 Extraction flow mein metal chuno aur uske saare steps chalte hue dekho!
Open Extraction Flow →