RECOVERY OF GOLD FROM CONCENTRATE
AND WASTE WITHOUT USING MERCURY
(CODE NO.1945)
Gold a bright yellow metal with resplendent luster. It is exceedingly malleable and ductile. It can be beaten into the sheets so thin that 2,50,000 of them may be placed one over another to form a pile one inch in thickness, it can be drawn into wires so thin that a length equal to 50 miles weight just 1 oz. It does not oxidize in air or oxygen at any temp. It is unaffected by the hydrochloric acid, nitric acid and sulphuric acid, even at temp. 100oC. A mixture of hydrochloric acid (Aqua Regia) dissolves the metal. It is not attacked by the alkali hydroxides, sulphur and sulphur dioxide, but is acted upon by the hydrogens, bromine being the most active. It readily amalgamates with mercury, a properly which has been taken advantage of in the extraction of gold from antiferrous sand in which gold is present in a finely dispersed form.
Gold is widely distributed in nature, though in minute quantities. It is present in significant concentrations in source quartz views and alluvial gravels, and these constitute the principal sources for the commercial extraction of the metal. It occurs in sea water in low concentrations (5-269 parts in 100 millions) and its recovery from this source is uneconomical.
Owing to its bright appearance, unalterability in air and occurance in the native condition, gold was probably one of the earliest metals discovered by the man. It is the metal most used even today for jewellery and international monetary transactions.
COST ESTIMATION
Plant Capacity GOLD RECOVERY FROM CONCENTRATE & WASTE
Land & Building (1.5 Acres) Rs. 3.45 Cr
Plant & Machinery Rs. 1.50 Cr
W.C. for 1 Month Rs. 3.04 Cr
Total Capital Investment Rs. 8.24 Cr
Rate of Return 44%
Break Even Point 39%
INTRODUCTION
TYPES OF GOLD ORE
OCCURENCE
USES & APPLICATIONS
PROPERTIES & CHARACTERISTES
CHEMICAL LEACHING AS AN ALTERNATIVE TO MERCURY
MARKET SURVEY
MANUFACTURING PROCESS OF GOLD RECOVERY FROM CONCENTRATE
AND WASTE WITHOUT USING MERCURY
PROCESS FLOW DIAGRAM
METHOD OF MINING AND CONCENTRATION
DIRECT SMELTING METHOD TO OBTAIN GOLD FROM CONCENTRATE
MODEL OF A MERCURY FREE PROCESSING PLANT
DETAILS OF CONCENTRATION METHODS
DETAILS OF GOLD RECOVERY METHODS
HEALTH & SAFETY FACTORS
PRINCIPLES OF PLANT LAYOUT
PLANT LOCATION FACTORS
EXPLANATION OF TERMS USED IN THE PROJECT REPORT
PROJECT IMPLEMENTATION SCHEDULES
SUPPLIERS OF RAW MATERIALS
SUPPLIERS OF PLANT AND MACHINERY
APPENDIX – A :
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
