Method and system of dry processing of converter slag in copper smelting

Abstract

A method for processing converter slag produced in copper smelting includes feeding the converter slag into a reducing furnace, reducing zinc and copper contained in the converter slag by heating and removing the reduced zinc through volatilization in a reducing furnace. The slag discharged from the converter is transformed into a raw material for iron making.

1 . A method for processing converter slag produced in copper smelting, comprising:
 feeding converter slag into a reducing furnace;   reducing zinc and copper contained in the converter slag by heating; and   removing the reduced zinc through volatilization in the reducing furnace.   
     
     
         2 . The method according to  claim 1 , further comprising:
 separating the reduced copper from the converter slag by sedimentation in the reducing furnace.   
     
     
         3 . The method according to  claim 1 , further comprising:
 transferring the reduced copper and the converter slag to a settling furnace from the reducing furnace; and   separating the reduced copper from the converter slag by sedimentation in the settling furnace.   
     
     
         4 . The method according to  claim 2 , further comprising:
 crushing slag after the sedimentation separation of the reduced copper from the converter slag.   
     
     
         5 . The method according to  claim 3 , further comprising:
 crushing slag after the sedimentation separation of the reduced copper from the converter slag.   
     
     
         6 . The method according to  claim 1 , further comprising:
 reducing Fe 3 O 4  contained in the converter slag to FeO by heating in the reducing furnace.   
     
     
         7 . The method according to  claim 2 , further comprising:
 reducing Fe 3 O 4  contained in the converter slag to FeO by heating in the reducing furnace.   
     
     
         8 . The method according to  claim 3 , further comprising:
 reducing Fe 3 O 4  contained in the converter slag to FeO by heating in the reducing furnace.   
     
     
         9 . The method according to  claim 1 , wherein the converter slag is fed from a holding furnace into the reducing furnace, the holding furnace retains the converter slag in a molten state and controls a feed rate of the converter slag to the reducing furnace. 
     
     
         10 . The method according to  claim 2 , wherein the converter slag is fed from a holding furnace into the reducing furnace, the holding furnace retains the converter slag in a molten state and controls a feed rate of the converter slag to the reducing furnace. 
     
     
         11 . The method according to  claim 3 , wherein the converter slag is fed from a holding furnace into the reducing furnace, the holding furnace retains the converter slag in a molten state and controls a feed rate of the converter slag to the reducing furnace. 
     
     
         12 . The method according to  claim 4 , wherein the converter slag is fed from a holding furnace into the reducing furnace, the holding furnace retains the converter slag in a molten state and controls a feed rate of the converter slag to the reducing furnace. 
     
     
         13 . The method according to  claim 5 , wherein the converter slag is fed from a holding furnace into the reducing furnace, the holding furnace retains the converter slag in a molten state and controls a feed rate of the converter slag to the reducing furnace. 
     
     
         14 . A system for processing converter slag produced during copper smelting comprising:
 a reducing furnace configured to reduce zinc and copper contained in converter slag by heating;   discharging means provided in the reducing furnace, configured to discharge the volatile reduced zinc; and   draining means configured to drain the reduced copper separated by sedimentation from the reducing furnace.   
     
     
         15 . The system according to  claim 14 , further comprising:
 crushing means configured to crush the converter slag; and   first transferring means configured to transfer the converter slag discharged from the reducing furnace to the crushing means.   
     
     
         16 . The system according to  claim 15 , further comprising:
 a holding furnace configured to maintain the converter slag in a molten state and configured to control a feed rate of the converter slag to the reducing furnace;   second transfer means configured to transfer the converter slag discharged from the holding furnace to the reducing furnace.   
     
     
         17 . A system for processing converter slag produced during copper smelting comprising:
 a reducing furnace configured to reduce zinc and copper contained in converter slag by heating;   discharging means provided in the reducing furnace, configured to discharge the volatile reduced zinc;   a settling furnace configured to separate the reduced copper from the converter slag by sedimentation;   first transfer means configured to transfer the converter slag discharged from the reducing furnace to the settling furnace; and   draining means configured to drain the reduced copper separated by sedimentation from to the settling furnace.   
     
     
         18 . The system according to  claim 17 , further comprising:
 crushing means configured to crush the converter slag; and   second transfer means configured to transfer the converter slag discharged from the settling furnace to the crushing means.   
     
     
         19 . The system according to  claim 17 , further comprising:
 a holding furnace configured to maintain the converter slag in a molten state and configured to control a feed rate of the converter slag to the reducing furnace;   second transfer means configured to transfer the converter slag discharged from the holding furnace to the reducing furnace.   
     
     
         20 . The system according to  claim 18 , further comprising:
 a holding furnace configured to maintain the converter slag in a molten state and configured to control a feed rate of the converter slag to the reducing furnace;   third transfer means configured to transfer the converter slag discharged from the holding furnace to the reducing furnace.