PENGOLAHAN MINERAL -- IRON (FE) FIX.pptx

1. PENGOLAHAN MINERAL — IRON (FE) Kelompok 1 AGHNI ULMA SAUDI (1206237694) FALAH HERDINO (1206217490) HELENA SEPTIAN ( 1206239182) MILADY TYANTO NUGROHO ( 1206245102) NUR AINI ( 1206217553) RININTA TRIASWINANTI ( 1206217332)

2. Iron ores Magnetite (Fe 3 O 4 ) Pentlandite ([FeNi]S) Ilmenite (FeO.TiO 2 ) Siderite (FeCO 3 ) Limenite (2Fe 2 O 3 .3H 2 O) Hematite (Fe 2 O 3 )

3. GOAL Untuk mendapatkan konsentrat Fe dengan kadar kemurnian >60% dan ukuran tertentu yang sesuai dengan prasyarat proses pembuatan besi/baja yang akan dilakukan ( B last Furnace, Direct Reduction, Smelting Process , dll )

4. MINING PROCESS In Situ Solution Mining

5. MINING WASTES OVERBURDEN WASTE ROCK MINE WATER

6. Terbagi atas 3 tahap : Crushing (Primary, Secondary)  Ø 5-20 cm Grinding  Ø 10-300  m Milling COMMINUTION PROCESS

7. Comminution process SELECTION B ergantung pada : Sifat Mineral Kapasitas produksi Rasio r eduction & ukuran akhir yang dibutuhkan Energi yang dibutuhkan Wet / dry product Cost

8. CONCENTRATION PROCESS Gravity concentration  perbedaan density Magnetic separation  perbedaan magnetic permeability Electrostatic separation  perbedaan electrical conductivity

9. CONCENTRATION PROCESS (CONT’D) Magnetic Separator

10. LOW GRADE ORE CONCENTRATION Washing (leaching) Heavy Media Separation Floatation Jigging

11. LOW GRADE ORE CONCENTRATION ( Cont’D ) Design and Function of Flotation Cell Ore pulp feed Ore concentrate Tailing Air supply Agitator

12. AGGLOMERATION PROCESS Sintering ( partikel ore < 2mm)  P encampuran fe yang underzide dengan binder dan air lalu dipanaskan Pelletizing ( partikel ore <0,02 mm)  P encampuran fe yang underzide dengan binders (limestone, dolomite, soda ash, bentonite, organic compounds); lalu dipanaskan Briquetting  P emanasan ore lalu dipressing menjadi briket ( digunakan untuk proses DR )

13. AGGLOMERATION PROCESS (CONT’D) Briquetting process Grate sintering process Pelletizing

14. Process flowchart

15. Process flowchart (cont’d)

16. Iron making process Blast furnace Lump ore  BF  Hot metal Direct Reduction Pellet/sinter  DR  Sponge iron Smelting Process Lump ore/scrap  SP  Hot metal

17. BLAST FURNACE

18. Non-direct reduction 1) Fe 2 O 3 + CO = CO 2 + 2 Fe 3 O 4 Mulai pada temperature 850° F 2 ) Fe 3 O 4 + CO = CO 2 + 3 FeO Mulai pada temperature 1100° F 3) FeO + CO = CO 2 + Fe atau FeO + C = CO + Fe Mulai pada temperature 1300° F

19. Hot metal composition Besi (Fe) = 93.5 - 95.0% Silikon (Si) = 0.30 - 0.90% Sulfur (S) = 0.025 - 0.050% Mangan ( Mn ) = 0.55 - 0.75% Phospor (P) = 0.03 - 0.09% Titanium (Ti) = 0.02 - 0.06% Karbon (C) = 4.1 - 4.4%

20. STEEL MAKING PROCESS Open Hearth Furnace Basic Oxygen Furnace (BOF) Electric Arc Furnace (EAF )

21. TERima kasih