Industry
23.20 - Manufacture of refractory products
Super Industries
Includes and excludes
This class includes the manufacture of intermediate products from mined or quarried non-metallic minerals, such as sand, gravel, stone or clay.
This class includes:
- manufacture of refractory mortars, concretes etc.
- manufacture of refractory ceramic goods:
• heat-insulating ceramic goods of siliceous fossil meals
• refractory bricks, blocks and tiles etc.
• retorts, crucibles, muffles, nozzles, tubes, pipes etc.
This class also includes:
- manufacture of refractory articles containing magnesite, dolomite or chromite
