2.1.1 Carbon and Graphite Subcategory
Description and Production Process
The major products of this subcategory are electrodes and other carbon-and-graphite
products besides electrodes. The electrodes are principal parts of electronic furnace
as well as electrolytic cell which are used in metal industry for smelting, refining, and
electroplating purposes. The electrodes are employed individually or combined
depending on the industry and the desired products. Carbon electrodes are used
singularly in the aluminum industries, while the graphite electrodes are used in the
metallurgical industries as well as inorganic chemical industries for the production of
caustic soda, chlorine, potash, and sodium chlorate. Combined carbon and graphite
electrode are used for structural, refractory, nuclear, and other non-electrical applications. They are also used in the production of brushes, brush stock contacts, jigs
and fixtures, battery carbons, seals and rings, as well as rods for electric arc lighting,
welding, and metal cutting. Both types of electrodes are produced from conglomerate of small particles, which are further heat-treated at temperature above 1000
C.
Graphite requires special treatment at a higher temperature in order to give its special
anisotropic crystalline structure. Graphite electrodes are produced from the baked
carbon in an electric furnace. The baked carbon is packed with metallurgical coke,
graphite, or charcoal which helps to conduct current at the start of heating and at an
Table 4.4 (continued)
Codes
Component category
SIC 3693
a
Electromedical and electrotherapeutic apparatus
Electrical equipment for internal combustion engine
SIC 36941
a
Electrical machinery, equipment, and supplies (nec)
SIC 3699
a
Source: [2]
nec not elsewhere classified
a Early classification
b
As reclassified
Table 4.5 SIC code for computer and electronic components
SIC code
Component category
SIC 3571
Electronic computers
SIC 3572
Computer storage devices
SIC 3575
Computer terminals
SIC 3577
Other computer equipment
SIC 3578
Calculating and accounting machines except electronic computers
SIC 3579
Office machines (nec)
Source: [2]
nec not elsewhere classified
4 Electrical and Electronic Wastes Treatment
121
Description and Production Process
The major products of this subcategory are electrodes and other carbon-and-graphite
products besides electrodes. The electrodes are principal parts of electronic furnace
as well as electrolytic cell which are used in metal industry for smelting, refining, and
electroplating purposes. The electrodes are employed individually or combined
depending on the industry and the desired products. Carbon electrodes are used
singularly in the aluminum industries, while the graphite electrodes are used in the
metallurgical industries as well as inorganic chemical industries for the production of
caustic soda, chlorine, potash, and sodium chlorate. Combined carbon and graphite
electrode are used for structural, refractory, nuclear, and other non-electrical applications. They are also used in the production of brushes, brush stock contacts, jigs
and fixtures, battery carbons, seals and rings, as well as rods for electric arc lighting,
welding, and metal cutting. Both types of electrodes are produced from conglomerate of small particles, which are further heat-treated at temperature above 1000
C.
Graphite requires special treatment at a higher temperature in order to give its special
anisotropic crystalline structure. Graphite electrodes are produced from the baked
carbon in an electric furnace. The baked carbon is packed with metallurgical coke,
graphite, or charcoal which helps to conduct current at the start of heating and at an
Table 4.4 (continued)
Codes
Component category
SIC 3693
a
Electromedical and electrotherapeutic apparatus
Electrical equipment for internal combustion engine
SIC 36941
a
Electrical machinery, equipment, and supplies (nec)
SIC 3699
a
Source: [2]
nec not elsewhere classified
a Early classification
b
As reclassified
Table 4.5 SIC code for computer and electronic components
SIC code
Component category
SIC 3571
Electronic computers
SIC 3572
Computer storage devices
SIC 3575
Computer terminals
SIC 3577
Other computer equipment
SIC 3578
Calculating and accounting machines except electronic computers
SIC 3579
Office machines (nec)
Source: [2]
nec not elsewhere classified
4 Electrical and Electronic Wastes Treatment
121