|  | C |
SECTION C — CHEMISTRY AND METALLURGY

|  | C |
Note(s) Definitions for Section C: Alkali metals: Li, Na, K, Rb, Cs, Fr Alkaline earth metals: Ca, Sr, Ba, Ra Lanthanides: elements with atomic numbers 57 to 71 inclusive Rare earths: Sc, Y, Lanthanides Actinides: elements with atomic numbers 89 to 103 inclusive Refractory metals: Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W Halogens: F, Cl, Br, I, At Noble gases: He, Ne, Ar, Kr, Xe, Rn Platinum group: Os, Ir, Pt, Ru, Rh, Pd Noble metals: Ag, Au, Platinum group Light metals: alkali metals, alkaline earth metals, Be, Al, Mg Heavy metals: metals other than light metals Iron group: Fe, Co, Ni Non-metals: H, B, C, Si, N, P, O, S, Se, Te, noble gases, halogens Metals: elements other than non-metals Transition elements: elements with atomic numbers 21 to 30 inclusive, 39 to 48 inclusive, 57 to 80 inclusive, 89 upwards

METALLURGY

|  | C21 |
METALLURGY OF IRON

|  | C21C |
PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON AND STEEL (refining or remelting metals in general Fulltext... Hierarchy... Expanded...C22B 9/00); TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS [2]

|  | C21C 1/00 |
Refining of pig-iron; Cast iron

|  | C21C 1/02 |
· | Dephosphorising or desulphurising

|  | C21C 1/04 |
· | Removing impurities other than carbon, phosphorus, and sulphur

|  | C21C 1/06 |
· | Constructional features of mixers for pig-iron

|  | C21C 1/08 |
· | Manufacture of cast-iron

|  | C21C 1/10 |
· | Making spheroidal graphite cast-iron

|  | C21C 3/00 |
Manufacture of wrought-iron or wrought-steel

|  | C21C 5/00 |
Manufacture of carbon steel, e.g. plain mild steel, medium carbon steel, or cast-steel

|  | C21C 5/02 |
· | Crucible furnace process

|  | C21C 5/04 |
· | Manufacture of hearth-furnace steel, e.g. Siemens-Martin steel

|  | C21C 5/06 |
· · | Processes yielding slags of special composition

|  | C21C 5/28 |
· | Manufacture of steel in the converter

|  | C21C 5/30 |
· · | Regulating or controlling the blowing

|  | C21C 5/32 |
· · · | Blowing from above

|  | C21C 5/34 |
· · · | Blowing through the bath

|  | C21C 5/36 |
· · | Processes yielding slags of special composition

|  | C21C 5/38 |
· · | Removal of waste gases or dust

|  | C21C 5/40 |
· · · | Offtakes or separating apparatus for converter waste gases or dust

|  | C21C 5/42 |
· · | Constructional features of converters

|  | C21C 5/44 |
· · · | Refractory linings

|  | C21C 5/46 |
· · · | Details or accessories

|  | C21C 5/48 |
· · · · | Bottoms or tuyeres of converters

|  | C21C 5/50 |
· · · · | Tilting mechanisms for converters

|  | C21C 5/52 |
· | Manufacture of steel in electric furnaces (electric heating per se Fulltext... Hierarchy... Expanded...H05B)

|  | C21C 5/54 |
· · | Processes yielding slags of special composition

|  | C21C 5/56 |
· | Manufacture of steel by other methods (making liquid steel by direct processes Fulltext... Hierarchy... Expanded...C21B 13/00)

|  | C21C 7/00 |
Treating molten ferrous alloys, e.g. steel, not covered by groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C21C 1/00-C21C 5/00 (treating molten metals during moulding Fulltext... Hierarchy... Expanded...B22D 1/00, Fulltext... Hierarchy... Expanded...B22D 27/00; remelting ferrous metals Fulltext... Hierarchy... Expanded...C22B)

|  | C21C 7/02 |
( transferred to Fulltext... Hierarchy... Expanded...C21C 7/064 )

|  | C21C 7/04 |
· | Removing impurities by adding a treating agent

|  | C21C 7/06 |
· · | Deoxidising, e.g. killing

|  | C21C 7/064 |
· · | Dephosphorising; Desulphurising [3]

|  | C21C 7/068 |
· · | Decarburising [3]

|  | C21C 7/072 |
· · | Treatment with gases (Fulltext... Hierarchy... Expanded...C21C 7/06, Fulltext... Hierarchy... Expanded...C21C 7/064, Fulltext... Hierarchy... Expanded...C21C 7/068 take precedence) [3]

|  | C21C 7/076 |
· · | Use of slags or fluxes as treating agents (Fulltext... Hierarchy... Expanded...C21C 7/06, Fulltext... Hierarchy... Expanded...C21C 7/064, Fulltext... Hierarchy... Expanded...C21C 7/068 take precedence) [3]

|  | C21C 7/10 |
· | Handling in vacuum