chromite project needing processing in Afghanistnan

chromite processing

1. Chromite Processing Presentation about By: Engr. Ahmad Zahid

2. Chromite

3. 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

4. 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

5. 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.

6. Raw form: 300$ per ton Ferrochrome 2400$ per ton Market Analysis

7. Processing of chromite

8. 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.

9. Submerged Arc Furnace:

10. Refining of Chromium Metal

11. Secondary Options 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 Leaching by sulphuric acid then oxalic acid Leaching by NaOH Leaching by sulphuric acid and perchloric acid

12. Segregation Reduction of Chromite in the Presence of Calcium Chloride: