LIST
FEGURÐ OG VELLÍÐAN
HANDVERK
MENNING OG SAGA
SKEMMTUN
UMHVERFI
MATUR OG DRYKKUR
ÖFUGVERKFRÆÐI
VÍSINDI
ÍÞRÓTTIR
TÆKNI
KLÆÐANLEG TÆKNI
Carbon as Pure Graphite: Coke and Sand Heated round a Coke Core in an Electric Furnace (Acheson, US 568,323)
Acheson found that carbon heated on its own hardly turns to graphite, but carbon first bound to silicon does. Coke and sand packed round a coke core form silicon carbide when the current heats the core; hotter still, the silicon boils away and the carbon is left as pure graphite, which grows outward as the core.
Result: pure carbon in its graphite form, sorted like native graphite.
Source: E. G. Acheson, US patent 568,323 (1896), pp. 1-3 and drawing (shown above). The furnace runs at hundreds of volts and up to 1000 amperes.
Lengra kominn
2 days
Leiðbeiningar
1
1
Mix the charge
Mix the charge
Grind and mix powdered coke, sand, salt and sawdust thoroughly, the coke about half the weight (50 parts coke to 50 parts silica and other materials).
Efni fyrir þetta skref:
Málmvinnslukox50 partsNauðsynleg verkfæri:
Sandur
Natríumklóríð (salt)
Sag
Mortél og mortélstautur2
2
Build the furnace
Build the furnace
Build a furnace of firebrick with carbon electrodes through the two end walls. Lay a core of granular coke between the electrodes (Acheson's was 7 ft long by 4 in wide) and pack the mixture all round it.
Efni fyrir þetta skref:
Málmvinnslukox1 granular, for the coreNauðsynleg verkfæri:
Eldfastur steinn
Grafítskaut3
3
Run the current
Run the current
Turn on the current, at first about 650 V and 50 A. The core heats, and silicon carbide forms round it; as the heat rises further the carbide breaks up, silicon goes off as vapour and graphite is left, carrying more current. Near the end it is about 100 V and 1000 A. Stop before the graphite reaches the walls. Ours: a step-down transformer as the supply.
Nauðsynleg verkfæri:
NiðurstigsspennirGrafítskaut4
4
Take out the graphite
Take out the graphite
When cool, separate the graphite from the core and the unchanged mixture, and grade it like native graphite.
Nauðsynleg verkfæri:
Mortél og mortélstauturEfni
1- 1 granular, for the coreStaðgengill
Nauðsynleg verkfæri
7- Staðgengill
- Staðgengill
- Staðgengill
- Staðgengill
- Staðgengill
- Staðgengill
- Staðgengill
Þessi teikning býr til
CC0 opinbert ríki
Þessi teikning er gefin út undir CC0. Þér er frjálst að afrita, breyta, dreifa og nota þetta verk í hvaða tilgangi sem er, án þess að biðja um leyfi.
Studdu smiðinn með því að kaupa vörur í gegnum teikningu hans þar sem hann fær þóknun smiða sem seljendur ákvarða, eða búðu til nýja endurskoðun á þessari teikningu og tengdu hana sem tengingu í þinni eigin teikningu til að deila tekjum.