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Temperature °C A mine is supplying copper sulphide concentrate to a smelter/converter complex to produce blister copper, sulphuric acid and waste slag (35wt% FeO-65wt% SiO2). As the mining operation proceeds the concentrate grade from the associated mineral processing plant is maintained at 25% copper but the form of the copper changes over time from Cu$_2$S to CuFeS$_2$. Explain briefly the effects of this change on the smelter and converter operations, and in each case the impacts on production. 1800 2 Liquids 1600 SiO$_2$ (Cristobalite) + Liquid Liquid 1400 SiO$_2$ (Tridymite) + Liquid Fayalite + Liquid 1200 SiO$_2$ (Tridymite) + Fayalite FeO + Liquid Fayalite + FeO 10 20 30 40 50 60 70% 30 90 SiO$_2$ wt% FeO Fe$_2$SiO$_4$ FeO Figure 4. Phase diagram for the FeO-SiO$_2$ system

          Temperature °C
A mine is supplying copper sulphide concentrate to a smelter/converter complex
to produce blister copper, sulphuric acid and waste slag (35wt% FeO-65wt% SiO2).
As the mining operation proceeds the concentrate grade from the associated
mineral processing plant is maintained at 25% copper but the form of the copper
changes over time from Cu$_2$S to CuFeS$_2$.
Explain briefly the effects of this change on the smelter and converter operations,
and in each case the impacts on production.
1800
2 Liquids
1600
SiO$_2$ (Cristobalite) + Liquid
Liquid
1400
SiO$_2$ (Tridymite) + Liquid
Fayalite + Liquid
1200
SiO$_2$ (Tridymite) + Fayalite
FeO
+
Liquid
Fayalite + FeO
10
20
30
40
50
60
70%
30
90
SiO$_2$
wt% FeO
Fe$_2$SiO$_4$
FeO
Figure 4. Phase diagram for the FeO-SiO$_2$ system

Temperature °C
A mine is supplying copper sulphide concentrate to a smelter/converter complex
to produce blister copper, sulphuric acid and waste slag (35wt% FeO-65wt% SiO2).
As the mining operation proceeds the concentrate grade from the associated
mineral processing plant is maintained at 25% copper but the form of the copper
changes over time from Cu2S to CuFeS2.
Explain briefly the effects of this change on the smelter and converter operations,
and in each case the impacts on production.
1800
2 Liquids
1600
SiO2 (Cristobalite) + Liquid
Liquid
1400
SiO2 (Tridymite) + Liquid
Fayalite + Liquid
1200
SiO2 (Tridymite) + Fayalite
FeO
+
Liquid
Fayalite + FeO
10
20
30
40
50
60
70%
30
90
SiO2
wt% FeO
Fe2SiO4
FeO
Figure 4. Phase diagram for the FeO-SiO2 system

Added by Lori B.

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