The gradation of non-coking coal is based on Gross Calori c Value (GCV), the gradation of coking coal is based on ash content and for semi coking /weakly coking coal it is based on ash plus moisture content, as in vogue as per noti cation.
Around 77% of South Africa's energy needs are directly derived from coal.[5] South Africa is the 5th largest exporter of coal in the world, with 30% consumed overseas.[3] 92% of coal consumed on the African continent is produced in South Africa.[6] 80% of South Africa's CO2 emissions come from the energy supply which is dependent on coal, which produced the vast majority of the country's energy, or 42GWs.[3] In negotiations leading up to the COP26 Climate Conference in Glasgow, South Africa and its partner countries reached a $8.5 billion Climate finance package to end its reliance on coal.[7][8] The use of coal in South Africa dates back to the Iron Age (300–1880 AD), when charcoal (note: not coal, but charred wood) was used to melt iron and copper, but large-scale exploitation of coal did not occur until the mid-19th century.[9]
Most of the coal is burned to generate electricity and most electricity is generated by coal, but coal-fired power plants have been criticised for breaking environmental laws.[2] The health and environmental impact of the coal industry is serious, and phasing out coal would have short-term health and environmental benefits greatly exceeding the costs.[3] Electricity from new solar farms in India is cheaper than that generated by the country's existing coal plants.[4]
Grade | Ash Content |
---|---|
Steel Grade - I | Not exceeding 15% |
Steel Grade -II | Exceeding 15% but not exceeding 18% |
Washery Grade -I | Exceeding 18% but not exceeding 21% |
Washery Grade -II | Exceeding 21% but not exceeding 24% |
Washery Grade -III | Exceeding 24% but not exceeding 28% |
Washery Grade -IV | Exceeding 28% but not exceeding 35% |
Washery Grade – V | Exceeding 35% but not exceeding 42% |
Washery Grade -VI | Exceeding 42% but not exceeding 49% |
Grade | Ash+Moisture |
---|---|
Semi Coking Grade -I | Not exceeding 19% |
Semi Coking Grade -II | Exceeding 19% but not exceeding 24% |
GCV BAND (K.Cal./Kg.) | GRADE |
---|---|
Exceeding 7000 | G-1 |
Exceeding 6700 and not exceeding 7000 | G-2 |
Exceeding 6400 and not exceeding 6700 | G-3 |
Exceeding 6100 and not exceeding 6400 | G-4 |
Exceeding 5800 and not exceeding 6100 | G-5 |
Exceeding 5500 and not exceeding 5800 | G-6 |
Exceeding 5200 and not exceeding 5500 | G-7 |
Exceeding 4900 and not exceeding 5200 | G-8 |
Exceeding 4600 and not exceeding 4900 | G-9 |
Exceeding 4300 and not exceeding 4600 | G-10 |
Exceeding 4000 and not exceeding 4300 | G-11 |
Exceeding 3700 and not exceeding 4000 | G-12 |
Exceeding 3400 and not exceeding 3700 | G-13 |
Exceeding 3100 and not exceeding 3400 | G-14 |
Exceeding 2800 and not exceeding 3100 | G-15 |
Exceeding 2500 and not exceeding 2800 | G-16 |
Exceeding 2200 and not exceeding 2500 | G-17 |