Sample Preparation |
4.1 |
Crushing 1 kg sample to -3.35mm |
Blending and splitting 1 kg sample |
Environmental fee for 1 kg sample - reject storage or neutralizing/eliminate |
Screening |
4.2 |
Screening 1 kg sample size over 3 mm |
Screening 1 kg sample size up to 3 mm |
Drying |
4.3 |
Drying at 60-170оС for an hour |
Drying sample 1 kg at 60-105оС for 12-24 hours |
Comminution |
4.4 |
Bond work indices for ball mill |
Bond abrasion indices |
Bond crushing indices |
Grinding kinetics |
4.5 |
Grinding kinetics (per points) |
Grinding |
4.6 |
Grinding 1 kg sample in ball mill |
Flotation |
4.7 |
Rougher /1 kg/ |
Rougher /2 kg/ |
Cleaner /not including rougher/ |
flowsheet development and locked cycle test to be counted by cleaner and grinding stages |
Magnetic Separation |
4.8 |
Dry magnetic separation /to 10 kg/ |
Wet magnetic separation /to 10 kg/ |
Davis tube per 50 g |
Gravity |
4.9 |
Gravity /10 kg/ |
Separation by shaking table /1 kg/ |
Re-Separation by shaking table /1 kg/ |
Separation by spiral /1 kg/ |
Leaching |
4.10 |
Bottle roll testing for 48 hours 0.1-1 kg sample /leaching kinetics at 4 points/ |
Agitated leaching testing for 48 hours 0.1-1 kg sample /leaching kinetics at 4 points/ |
Leaching to 0.1 kg sample |
Small diam.columns /9 kg sample at size 25 mm/ |
Intermediate diam.columns /240 kg, size / |
Large diam.columns /above 1 tonne size over/ |
Reporting |
4.11 |
Reporting |
Coal Preparation, Washability |
Screening |
4.12 |
Coal Screening by Washery plant size /moisture, ash, sulphur/ |
Float and sink |
4.13 |
Float and sink testing by heavy liquid at size over >1mm |
Float and sink <1mm |
Coal separation by spiral separator at size 0.2-1mm |
Coal flotation at size 0.074-0.2mm |