2320 Manufacture of refractory products

This class includes the manufacture of intermediate products from mined or quarried non-metallic minerals, such as sand, gravel, stone or clay. [0]

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. [0]

Also includes

- manufacture of refractory articles containing magnesite, dolomite or chromite [0]

Does not include

[0]

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