PROCESSING OF LOW GRADE TUNGESTEN ORE (EIRI-1072)
The tungsten has a wide range of Industrial uses. The largest use is as tungsten carbide in cemented carbides. The available ore of tungsten are of very low grade ranging from 0.04 to 0.2% WO3 as against the commonly exploited ore grades of 0.5% WO3 world over. This process is a daunting challenge to the metallurgists to develop a suitable technology for the exploitation of Indian ore which of strategic importance to the country. The chief sources of tungsten are mineral scheelite [CaWo4] and wol framite [ (Fe.Mn) WO3] which deposited by hydrothermal solution. The tungsten has a melting point of 3350oC The highest of all metals and it is resistant to all acids at ordinary temperatures. It is elastic ductile and has high tensile strength and can be drawn into very thin wires. The domestic requirements of tungsten and its products are met through imports. Most tungsten ore contain less than 1.5% Wo3. For concentration tungsten ore, first crushed and milled to liberate the tungsten mineral crystals. Scheelite ore can be concentrated by gravimetric methods often combined with froth floatation, whilst wolfranite ore can be concentrated by gravity, sometimes in combination with magnetic separation.
Cost Estimation
Plant Capacity 4 Ton/Day
Land and Building (Area 5000 sq.mt.) Rs. 6.60 Cr.
Plant & Machinery Rs. 23 Lacs
W.C. for 3 Months Rs. 1.70 Cr.
Total Capital Investment Rs. 8.69 Cr.
Rate of Return 42%
Break Even Point 43%
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MARKET SURVEY CUM DETAILED TECHNO
ECONOMIC FEASIBILITY REPORT covers
- Introduction
- Uses and application
- Hard materials
- Alloys
- Armaments
- Chemical applications
- Niche uses
- Electronics
- Market forecasting
- Supply and demand outlook
- Table world tungsten production and reserve base
- Tungsten projected supply and demand
- B.i.s. Specifications
- Plant layout
- Testing of ore
- Table i: chemical analysis of tungsten concentrate
- Table ii: metallurgical balance for tungsten flotation
- Table iii. Optimum parameters of tungsten flotation
- Table iv: effect of ph
- Table v: effect of % solids
- Table vi: effect of collector
- Table vii: effect of frother
- Table viii effect of depressant
- Table ix: effect of conditioning time
- Table x. Effect of flotation time
- Table xi. Chemical analysis of final tungsten concentrate
- Samples, basis of the tests
- Study of the samples containing garnet
- Preparation of the average sample
- Mineralogical structure of the ore
- Separation of scheelite
- Test conducted on poor grade ore
- Plant and costprice
- Manufacturing process
- Secondary & tertiary crushing
- Grinding, classification and talc flotation
- Sulphide flotation
- Gravity separation
- Drying and magnetic separation
- Concentrate handling and storage
- Suppliers of tungsten powders
- Suppliers of plant and machinery
- Cyclone dust collector
- Cone crusher
- Water pump
- Rotary dryer
- Spiral conveyer
- Double diaphragm pump
- D.g.sets
- Suppliers of raw materials
APPENDIX
1. COST OF PLANT ECONOMICS
2. LAND & BUILDING
3. PLANT AND MACHINERY
4. FIXED CAPITAL INVESTMENT
5. RAW MATERIAL
6. SALARY AND WAGES
7. UTILITIES AND OVERHEADS
8. TOTAL WORKING CAPITAL
9. COST OF PRODUCTION
10. PROFITABILITY ANALYSIS
11. BREAK EVEN POINT
12. RESOURCES OF FINANCE
13. INTEREST CHART
14. DEPRECIATION CHART
15. CASH FLOW STATEMENT
16. PROJECTED BALANCE SHEET
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