Manufacture of refractory products

This class includes

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.

Also includes

This class also includes:

• manufacture of refractory articles containing magnesite, dolomite or chromite