chromite project needing processing in Afghanistnan
- 2. Chromite Processing Presentation about By: Engr. Ahmad Zahid
- 3. Chromite
- 4. Introduction to chromite • It’s an oxide mineral belonging to spinel group with spinel structure (cubic), with the chemical formula of FeCr₂O₄. • Ores: • Commercial chromite deposits are found in two forms stratiform seams and irregular podiform/lenticular deposits
- 5. Occurrence: • The chromite minerals occur in layered formations that can be hundreds of kilometers long and a few meters thick. • Chromite deposits are being mined in several provinces surrounding Kabul, such as Nangarhar, Kapisa, Parwan, Logar, Maidan-Wardak, and further to the north- east, in Badakhshan and Panjshir • Probable Reserves of Chromite are approximately 0.2 million metric tons
- 6. Uses: The utilization of Chromite ores in three main industrial groups in terms of percentages is provided below: · Metallurgical –About 65 % to 70 % of the entire production is used by this sector alone. · Chemical – this sector utilizes about 15 % to 20 % of the ore produced. · Refractory – about 10 % to 15 % of ore is consumed by this sector.
- 7. Raw form: 300$ per ton Ferrochrome 2400$ per ton Market Analysis
- 10. Pellets are made from:- - Chromite powder + Coal + Sillica - Preheated to General Reaction of reduction of chromite ore: - Cr2FeO4 + 4C → 2Cr + Fe + 4CO - Cr2O3 + 3C = 2Cr + 3 CO.
- 14. Refining of Chromium Metal
- 15. Secondary Options 1. Direct Production of Ferrochrome by Segregation Reduction of Chromite in the Presence of Calcium Chloride: Pellets (powder chromite+graphite+cacl2) then sintered 1300 for 2hr 1. Leaching by sulphuric acid then oxalic acid 2. Leaching by NaOH 3. Leaching by sulphuric acid and perchloric acid
- 16. Segregation Reduction of Chromite in the Presence of Calcium Chloride: