WZ 23.20.0—Manufacture of refractory products

Where 23.20.0 sits

1. C Manufacturing
2. 23 Manufacture of other non-metallic mineral products
3. 23.2 Manufacture of refractory products
4. 23.20 Manufacture of refractory products
5. 23.20.0 Manufacture of refractory products

What 23.20.0 includes

• Manufacture of intermediate products from nonmetallic minerals (e.g., gravel, stone, or clay) extracted from mines or quarries
• Manufacture of refractory mortars, refractory concrete, etc.
• Manufacture of refractory ceramic goods, e.g.: • Heatinsulating ceramic goods made from siliceous fossil flours • Refractory bricks, slabs, and tiles, etc. • Retorts, crucibles, muffles, spouts, pipes, etc.
• Manufacture of refractory articles containing magnesium oxide, calcium magnesium oxide or chromite

23.20.0 in other systems