Copper. Recovery stage of fire refining of copper.
Restorative
Refining stage
Copper
Restorative
Treatment of molten copper (teasing)
Can be carried out with fuel oil, natural
Gas or with freshly cut
Wood in the form of logs or poles. When
Heating reagents
Decompose thermally, forming H2; CO;
CH4 and other hydrocarbons that
Recover remaining in copper in
The dissolved state of Cu2O from the reactions:
Cu2 O
+ CO = 2Cu + CO2
Cu2O
+ CH4 = 8Cu + 2H2O + CO2
Application
Hydrogen as a reducing agent is not
Is preferable. hydrogen
Intensively dissolves in anoxic
Copper. When casting an anode body,
Pores, shells and looseness. For
Satisfactory recovery
It is necessary to leave a small amount
Cuprous oxide in the melt, which in turn
Leads to an increase in the dissolution of copper
During electrolysis.
Intensive
Stirring the bath with bubbles
Of reducing gases during
Copper debris provides high
Degree of reduction of Cu2O and removal
From the melt of gases dissolved in it
(H2Opar, CO2, O2, etc.); Duration
Teasing is 2.5-3 hours.
After
Dense copper, containing
Less than 0.01% S (mainly in the form of
Cu2 S) and up to 0.2% O2 are poured into the anodes-ingots
With ears - 800-1000 mm long; Width 800-900
Mm and a thickness of 35-40 mm on horizontal
Carrousel filling machines
Type.
Weight
The anode varies at different factories
From 175 to 375 kg. Anode casting in dependence
From the capacity of refining ovens
Lasts 5-8 hours. The total duration
Process of fire (oxidative)
Refining of copper during processing
Solid metal reaches 24 h.
AT
Stationary refining ovens
Melts and refines, so-called,
Solid copper, represented by metal
Ingots produced on copper smelters
Factories, metal scrap of electrolysis
Copper, secondary copper.
Main
Lack of the method described above
Blast furnace fire refining
Periodicity of the process. Above elimination
This major shortcoming has long
Metallurgists work. To the present
Time a number of foreign firms invited
Several options for industrial
Continuous
Fire refining of blister copper.