CN101921919B - Comprehensive utilization process of molten copper slag and system thereof - Google Patents
Comprehensive utilization process of molten copper slag and system thereof Download PDFInfo
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- CN101921919B CN101921919B CN2010102763926A CN201010276392A CN101921919B CN 101921919 B CN101921919 B CN 101921919B CN 2010102763926 A CN2010102763926 A CN 2010102763926A CN 201010276392 A CN201010276392 A CN 201010276392A CN 101921919 B CN101921919 B CN 101921919B
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Abstract
The invention relates to a comprehensive utilization process of molten copper slag and a system thereof, which has the characteristics of high extraction ratio, low cost, energy saving, and the like. A feed end of a copper extracting furnace is connected with thermal molten copper slag, the copper extracting furnace is also provided with a spray gun, and the tail end of the spray gun is immersed in a molten pool. A slag outlet of the copper extracting furnace is connected with a feed end of a copper iron alloy extracting furnace through a feeding device, and CaO is added into the copper extracting furnace through a charging bucket. The copper iron alloy extracting furnace is also provided with a reducing agent II steam addition spray gun, the tail end of the spray gun is immersed in the molten pool, and the bottom of the copper iron alloy extracting furnace is provided with a pure oxygen blow gun. The copper iron alloy extracting furnace is provided with a copper iron alloy discharge port and a waste slag discharge port, and the waste slag discharge port is connected with a granulating device. One part of smoke of the copper iron alloy extracting furnace is sent to the copper extracting furnace, and the other part of smoke is sent to a bootstrap system. The bootstrap system comprises a heat exchange device, the heat exchange device is connected with a turbine generator and a dust collecting device, and the dust collecting device is connected with a dust recovery system. One part of collected smoke is used as an auxiliary material to decompose a heat source, and the other part thereof is sent to the turbine generator.
Description
Technical field
The present invention relates to nonferrous metallurgy and technical field of ferrous metallurgy, particularly a kind of molten copper slag comprehensive utilization process and system thereof.
Background technology
Copper ashes is the residuum behind the recovery copper in the pyrometallurgical smelting process.About 2 ~ 3t the copper ashes of every production 1t copper output contains a large amount of valuable components in the slag in copper smelting by pyrometallurgy, and wherein cupric about 1.5%, and iron content about 40% also contains noble metals such as a spot of zinc, nickel, cobalt simultaneously.
Current copper ashes reclaims copper and mainly adopts pyrogenic process dilution method and flotation process, and the slag copper content is about 0.5% after the pyrogenic process dilution, and flotation process is about 0.4%, and the rate of recovery of copper is all not high.Iron in the copper ashes mainly exists with the form of fayalite, Z 250, the two mutual embedding cloth, and granularity is all less, and recovery difficult is big, the cost height.The recovery extraction research of iron is less in the copper ashes at present, still is in the preliminary study stage.Main study route is to advertise oxygen enrichment in the cinder ladle that liquid copper ashes is housed, and makes the iron protoxide in the slag be oxidized to Z 250, reclaim by the magnetic separation mode then, but the rate of recovery of iron and grade is all not high.
The dilution of tradition copper ashes all is the processing that the cold conditions slag is carried out, research to hot molten copper slag comprehensive utilization is less, heat in the copper ashes is not fully used, and the most of heat in the slag is all wasted, and exists problems such as cost height, energy dissipation be serious.
At present the dilution form of copper ashes is more single, mainly concentrates on the technical elements that merely reclaims copper or iron, and as the copper-iron alloy of weathering steel raw material, the rarely seen report of relevant recovery technology.Weathering steel is widely used in fields such as track traffic, bridge construction and freight container at present because of its good weathering resistance and good mechanics, welding property, has vast market prospect so it can be asserted that can be used as the copper-iron alloy of weathering steel raw material.
Summary of the invention
The present invention overcomes the deficiency that the valuable metal resource utilization exists in the above-mentioned copper ashes, a kind of molten copper slag comprehensive utilization process and system thereof have been researched and developed, solve aforesaid method and handle problems such as the valuable metal extraction yield that copper ashes exists is low, extraction cost is high, the extraction form is single, energy dissipation is serious, this molten copper slag comprehensive utilization process has characteristics such as extraction yield height, cost are low, save energy.
For achieving the above object, the present invention adopts following technical scheme:
A kind of molten copper slag comprehensive utilization process, it comprises that low temperature is put forward copper process, high temperature is put forward copper-iron alloy operation and waste heat recovery operation; Wherein,
Low temperature is carried copper and is carried the copper stove for 1270 ℃-1370 ℃ thermal molten copper slag of copper smelting furnace discharge is sent into; Add excessive reductive agent I gac and CaO subsequently; In carrying the copper stove, spray into the pressurized inert gas of 20kpa-30kpa then, and utilize the gas of inert gas torch ejection that the molten bath is produced stirring action; Reduction back copper water is collected, and slag is sent into high temperature and put forward the copper-iron alloy operation;
Put forward the copper-iron alloy operation, send into from the slag of carrying the copper stove and carry in the copper-iron alloy stove, sent spray gun to send in the stove excessive reductant II water vapor, spray gun one end immerses in the molten bath, and the molten bath is produced stirring action, and slag and reductive agent are mixed; Pure oxygen is blown into from carrying the copper-iron alloy furnace bottom, equally the molten bath is produced stirring action; Bath temperature is between 1500 ℃-1600 ℃, and a coal gas of high temperature part of 1600 ℃-1700 ℃ of generation is proposed the insulation of copper stove for sending into, and another part send the waste heat recovery operation.
Described waste heat recovery operation is sent high-temperature flue gas into preboiler and is carried out heat exchange, and the steam that produces after the heat exchange is sent into steam turbine generating, electrical energy fed user; Low temperature coal gas after the heat exchange is after dedusting, respectively as carrying copper and carrying the auxiliary material that needs in the copper iron and decompose thermal source; Remainder is also sent to steam turbine power generation; The dust of collecting after the dedusting is sent into grey dust recovery system.
Described CaO preheating temperature is between 650 ℃-750 ℃.
Described reductive agent I is a gac; Reductive agent II is a water vapor.
A kind of molten copper slag comprehensive utilization process system, it comprises carries the copper stove, carries copper stove feed end and is connected with thermal molten copper slag, carries the copper stove simultaneously and also is provided with reductive agent I and inert gas torch, and spray gun is terminal to be immersed in the molten bath; Carry copper stove bottom and be provided with the copper water out, carry copper stove slag outlet by pay-off with carry copper-iron alloy stove feed end and be connected, CaO carries the copper stove by the batch can adding; Carry the copper-iron alloy stove and be provided with reductive agent II and add spray gun, this spray gun is terminal to be immersed in molten bath, carries the copper-iron alloy furnace bottom and is provided with pure oxygen and blows rifle; Carry the copper-iron alloy stove and be provided with copper-iron alloy relief outlet and waste relief outlet, the waste relief outlet is connected with prilling granulator; A high-temperature flue gas part of carrying the copper-iron alloy stove is sent into by pipeline and is carried the copper stove, and another part high-temperature flue gas is sent into bootstrap system; Bootstrap system comprises heat-exchanger rig, and heat-exchanger rig is connected with steam turbine, and steam turbine is connected with the user; Heat-exchanger rig also is connected with cleaning apparatus simultaneously, and cleaning apparatus is connected with grey dust recovery system, and the flue gas part of collection is decomposed thermal source as auxiliary material, and another part is sent into steam turbine power generation.
Described heat-exchanger rig is a waste heat boiler; Described cleaning apparatus is a sack cleaner.
Described prilling granulator is a pelletizer.
Technology of the present invention is divided a plurality of parts: low thermophase is carried copper, and hot stage is carried copper-iron alloy, the high temperature sludge waste heat recovery.
1, put forward copper process: 1270 ℃-1370 ℃ the thermal molten copper slag of discharging from copper smelting furnace flows into by chute to be carried the copper stove, adds excessive reductive agent gac and CaO after waiting bath surface to reach a certain height.Put forward copper stove strict seal, the spray gun of reductive agent by carrying copper stove periphery sprays into the pressurized nitrogen of 20kpa-30kpa, and the batch can of 650 ℃-750 ℃ CaO above carrying the copper stove that preheating is good adds.One end of spray gun is immersed in the molten bath, and the molten bath is produced stirring action.Cool off with copper cooling wall because of carrying the copper stove, heat radiation is very fast, in order to keep homo(io)thermism, will introduce from a part of coal gas of high temperature of carrying the copper-iron alloy stove and propose the loss that comes the supply heat in the copper stove.The flue gas of proposing the generation of copper stove directly discharges.In the high temperature molten bath of carrying copper stove bottom, the principal reaction that hot copper ashes and reductive agent and auxiliary material take place is:
Cu2S+CaO+aC=2Cu+CaS+(2a-1)CO+(1-a)CO2
Fe3O4+C=3FeO+CO
Fe2SiO4+CaO=2FeO+CaSiO3
The copper water that reduction obtains flows out from the low opening of stove one side-lower, and slag flows out to enter from the higher opening in opposite side below to be carried the copper-iron alloy stove.
2, put forward the copper-iron alloy operation: flow into from the slag of carrying the copper stove and carry in the copper-iron alloy stove.Reductive agent sprays in the stove through spray gun with water vapor, and an end of spray gun immerses in the molten bath, and the molten bath is produced the intensive stirring action, and slag and reductive agent are mixed.Pure oxygen is blown into from carrying the copper-iron alloy furnace bottom, and the mode of bottom blowing has been strengthened the stirring action to the molten bath, can add the speed of fast response.The heat of high temperature that reaction produces provides reaction needed reduction heat by radiation, conduction, and the temperature maintenance in molten bath is about 1500 ℃-1600 ℃.A coal gas of high temperature part of 1600 ℃-1700 ℃ that produces offers the insulation of copper stove, and another part goes waste heat boiler to carry out heat recovery.In carrying the copper-iron alloy stove, the principal reaction that molten bath and secondary combustion zone take place is as follows:
FeO+C=Fe+CO
Fe2SiO4+2C=2Fe+SiO2+2CO
Cu2S+CaO+aC=2Cu+CaS+(2a-1)CO+(1-a)CO2
2CO+O2=2CO2
The copper-iron alloy that produces is discharged by following outlet, and waste is discharged by top outlet, enters pelletizer and carries out the liquid slag non-slurry pelletizing.
3, waste heat recovery operation: from carrying the part coal gas of high temperature that the copper-iron alloy stove comes out, enter waste heat boiler and carry out heat exchange, the steam that produces after the heat exchange promotes the steam turbine generating, supplies with required user.Low temperature coal gas after the heat exchange is after sack cleaner gathers dust, and part is as carrying copper and carrying the auxiliary material that needs in the copper-iron alloy and decompose thermal source, and rest parts is removed steam turbine power generation.The dust of collecting through sack cleaner then enters grey dust recovery system.
The invention has the beneficial effects as follows:
1, technology is simple, and low thermophase directly reduces copper, and grade can reach 99%, can directly send to the anode furnace refining, has saved to reclaim that extracting further blows behind the copper sulphur again generates the technology of blister copper;
2, greatly improved the rate of recovery of copper in the copper ashes, changed the low situation of traditional method copper recovery, copper recovery can reach more than 98%;
3, can directly make reductive agent under the high temperature,,, provide cost savings also without sintering without coke with powdery or granulous mill coal;
4, the copper-iron alloy copper content 0.1 ~ 0.8% of Sheng Chenging, other impurity are also few, satisfy the requirement of weathering steel to raw material fully, its value ratio pure iron height.
5, on the basis of reclaiming copper, remaining copper and iron directly reduction obtain the product copper-iron alloy, and method is easy, and flexible operation is easy to promote.
6, directly utilize the hot slag of fusion to carry out the extraction of copper and copper-iron alloy, save energy.
7, the hot slag of carrying behind the copper iron is carried out heat recovery, reduce cost save energy.
Description of drawings
Fig. 1 is a flow sheet of the present invention;
Fig. 2 is the waste heat recovery part system diagram of Fig. 1 process flow sheet.
Wherein, 1 thermal molten copper slag, 2 carry the copper stove, 3 reductive agent I; 4CaO, 5 nitrogen, 6 batch cans, 7 slags; 8 carry the copper-iron alloy stove, 9 coal gas of high temperature, 10 waste heat boilers, 11 pelletizers; 12 copper-iron alloys, 13 flue gases, 14 bronze medal water, 15 reductive agent II; 16 pure oxygens, 17 steam turbines, 18 users, 19 sack cleaners; 20 auxiliary materials decompose thermal source, 21 steam turbine power generations, 22 grey dust recovery systems.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing and embodiment.
Among Fig. 1, Fig. 2, molten copper slag comprehensive utilization process system comprises and carries copper stove 2, carries copper stove 2 feed ends and is connected with thermal molten copper slag 1, carries the spray gun that copper stove 2 also is provided with reductive agent I 3 and nitrogen 5 simultaneously, and spray gun is terminal to be immersed in the molten bath; Slag 7 outlet of carrying copper stove 2 by pay-off with carry copper-iron alloy stove 8 feed ends and be connected, CaO 4 carries copper stove 2 by batch can 6 addings, carries copper stove 2 bottoms and also is provided with copper water 14 relief outlets; Carry copper-iron alloy stove 8 and be provided with reductive agent II15 and add spray gun, this spray gun is terminal to be immersed in molten bath, carries copper-iron alloy stove 8 bottoms and is provided with pure oxygen 16 and blows rifle; Carry copper-iron alloy stove 8 and be provided with copper-iron alloy 12 relief outlets and waste relief outlet, the waste relief outlet is connected with prilling granulator; High-temperature flue gas 9 parts of carrying copper-iron alloy stove 8 are sent into by pipeline and are carried copper stove 2, and another part high-temperature flue gas 9 is sent into bootstrap system; Bootstrap system comprises heat-exchanger rig, heat-exchanger rig is connected with steam turbine 17, steam turbine 17 is connected with user 18, heat-exchanger rig also is connected with cleaning apparatus simultaneously, cleaning apparatus is connected with grey dust recovery system 22, flue gas 13 parts of collecting are decomposed thermal source 20 as auxiliary material, and another part is sent into steam turbine power generation 21.
Described heat-exchanger rig is a waste heat boiler 10; Described cleaning apparatus is a sack cleaner 19.
Described prilling granulator is a pelletizer 11.
Technology of the present invention is:
Embodiment 1:
Put forward the copper flow process: 1270 ℃ the thermal molten copper slag 1 of discharging from copper smelting furnace flows into by chute to be carried the copper stove 2, adds excessive reductive agent I 3 gacs and CaO 4 after waiting bath surface to reach a certain height.Put forward copper stove 2 strict seal, the spray gun of reductive agent I 3 by carrying copper stove 1 periphery sprays into the pressurized nitrogen 5 of 20kpa, and the batch can 6 of 650 ℃ CaO 4 above carrying copper stove 2 that preheating is good adds.Spray gun one end is immersed in the molten bath, and the molten bath is produced stirring action.Because of proposing the cooling of copper stove 2 usefulness copper cooling walls, heat radiation is very fast, in order to keep homo(io)thermism, will introduce from a part of coal gas of high temperature 9 of carrying copper-iron alloy stove 8 and propose the loss that comes the supply heat in the copper stove 2.The flue gas 13 of proposing 2 generations of copper stove directly discharges.In the high temperature molten bath of carrying copper stove 2 bottoms, the principal reaction that hot copper ashes and reductive agent and auxiliary material take place is:
Cu2S+CaO+aC=2Cu+CaS+(2a-1)CO+(1-a)CO2
Fe3O4+C=3FeO+CO
Fe2SiO4+CaO=2FeO+CaSiO3
The copper water 14 that reduction obtains flows out from the low opening of stove one side-lower, and slag 7 flows out to enter from the higher opening in opposite side below to be carried the copper-iron alloy stove 8.
2, put forward the copper-iron alloy flow process: flow into from the slag 7 of carrying copper stove 2 and carry in the copper-iron alloy stove 8.Reductive agent II 15 is a water vapor, sprays in the stove through spray gun, and an end of spray gun immerses in the molten bath, and the molten bath is produced the intensive stirring action, and slag 7 and reductive agent II 15 are mixed.Pure oxygen 16 is blown into from carrying copper-iron alloy stove 8 bottoms, and the mode of bottom blowing has been strengthened the stirring action to the molten bath, can add the speed of fast response.The heat of high temperature that reaction produces provides reaction needed reduction heat by radiation, conduction, and the temperature maintenance in molten bath is at 1500 ℃.Coal gas of high temperature 9 parts of 1600 ℃ that produce offer 2 insulations of copper stove, and another part goes waste heat boiler 10 to carry out heat recovery.In carrying copper-iron alloy stove 8, the principal reaction that molten bath and secondary combustion zone take place is as follows:
FeO+C=Fe+CO
Fe2SiO4+2C=2Fe+SiO2+2CO
Cu2S+CaO+aC=2Cu+CaS+(2a-1)CO+(1-a)CO2
2CO+O2=2CO2
The copper-iron alloy 12 that produces is discharged by following outlet, and waste is discharged by top outlet, enters pelletizer 11 and carries out the liquid slag non-slurry pelletizing.
3, high temperature sludge waste heat recovery: from carrying the part coal gas of high temperature 9 that the copper-iron alloy stove comes out, enter waste heat boiler 10 and carry out heat exchange, the steam that produces after the heat exchange promotes steam turbine 17 generatings, supplies with required user 18.Low temperature coal gas after the heat exchange is after sack cleaner 19 gathers dust, and part is as carrying copper and carrying the auxiliary material that needs in the copper-iron alloy and decompose thermal source 20, and rest parts is removed steam turbine power generation 21.The dust of collecting through sack cleaner 19 then enters grey dust recovery system 22.
Embodiment 2:
Put forward the copper flow process: 1300 ℃ the thermal molten copper slag 1 of discharging from copper smelting furnace flows into by chute to be carried the copper stove 2, adds excessive reductive agent I 3 gacs and CaO 4 after waiting bath surface to reach a certain height.Put forward copper stove 2 strict seal, reductive agent I 3 sprays into 25kpa pressurized nitrogen 5 by the spray gun of carrying copper stove 1 periphery, and the batch can 6 of 700 ℃ CaO 4 above carrying copper stove 2 that preheating is good adds.Spray gun one end is immersed in the molten bath, and the molten bath is produced stirring action.Because of proposing the cooling of copper stove 2 usefulness copper cooling walls, heat radiation is very fast, in order to keep homo(io)thermism, will introduce from a part of coal gas of high temperature 9 of carrying copper-iron alloy stove 8 and propose the loss that comes the supply heat in the copper stove 2.The flue gas 13 of proposing 2 generations of copper stove directly discharges.In the high temperature molten bath of carrying copper stove 2 bottoms, the principal reaction that hot copper ashes and reductive agent and auxiliary material take place is:
Cu2S+CaO+aC=2Cu+CaS+(2a-1)CO+(1-a)CO2
Fe3O4+C=3FeO+CO
Fe2SiO4+CaO=2FeO+CaSiO3
The copper water 14 that reduction obtains flows out from the low opening of stove one side-lower, and slag 7 flows out to enter from the higher opening in opposite side below to be carried the copper-iron alloy stove 8.
2, put forward the copper-iron alloy flow process: flow into from the slag 7 of carrying copper stove 2 and carry in the copper-iron alloy stove 8.Reductive agent II 15 is a water vapor, sprays in the stove through spray gun, and an end of spray gun immerses in the molten bath, and the molten bath is produced the intensive stirring action, and slag 7 and reductive agent II 15 are mixed.Pure oxygen 16 is blown into from carrying copper-iron alloy stove 8 bottoms, and the mode of bottom blowing has been strengthened the stirring action to the molten bath, can add the speed of fast response.The heat of high temperature that reaction produces provides reaction needed reduction heat by radiation, conduction, and the temperature maintenance in molten bath is at 1550 ℃.Coal gas of high temperature 9 parts of about 1650 ℃ that produce offer 2 insulations of copper stove, and another part goes waste heat boiler 10 to carry out heat recovery.In carrying copper-iron alloy stove 8, the principal reaction that molten bath and secondary combustion zone take place is as follows:
FeO+C=Fe+CO
Fe2SiO4+2C=2Fe+SiO2+2CO
Cu2S+CaO+aC=2Cu+CaS+(2a-1)CO+(1-a)CO2
2CO+O2=2CO2
The copper-iron alloy 12 that produces is discharged by following outlet, and waste is discharged by top outlet, enters pelletizer 11 and carries out the liquid slag non-slurry pelletizing.
3, high temperature sludge waste heat recovery: from carrying the part coal gas of high temperature 9 that the copper-iron alloy stove comes out, enter waste heat boiler 10 and carry out heat exchange, the steam that produces after the heat exchange promotes steam turbine 17 generatings, supplies with required user 18.Low temperature coal gas after the heat exchange is after sack cleaner 19 gathers dust, and part is as carrying copper and carrying the auxiliary material that needs in the copper-iron alloy and decompose thermal source 20, and rest parts is removed steam turbine power generation 21.The dust of collecting through sack cleaner 19 then enters grey dust recovery system 22.
Embodiment 3:
Put forward the copper flow process: 1370 ℃ the thermal molten copper slag 1 of discharging from copper smelting furnace flows into by chute to be carried the copper stove 2, adds excessive reductive agent I 3 gacs and CaO 4 after waiting bath surface to reach a certain height.Put forward copper stove 2 strict seal, reductive agent I 3 sprays into 30kpa pressurized nitrogen 5 by the spray gun of carrying copper stove 1 periphery, and the batch can 6 of 750 ℃ CaO 4 above carrying copper stove 2 that preheating is good adds.Spray gun one end is immersed in the molten bath, and the molten bath is produced stirring action.Because of proposing the cooling of copper stove 2 usefulness copper cooling walls, heat radiation is very fast, in order to keep homo(io)thermism, will introduce from a part of coal gas of high temperature 9 of carrying copper-iron alloy stove 8 and propose the loss that comes the supply heat in the copper stove 2.The flue gas 13 of proposing 2 generations of copper stove directly discharges.In the high temperature molten bath of carrying copper stove 2 bottoms, the principal reaction that hot copper ashes and reductive agent and auxiliary material take place is:
Cu2S+CaO+aC=2Cu+CaS+(2a-1)CO+(1-a)CO2
Fe3O4+C=3FeO+CO
Fe2SiO4+CaO=2FeO+CaSiO3
The copper water 14 that reduction obtains flows out from the low opening of stove one side-lower, and slag 7 flows out to enter from the higher opening in opposite side below to be carried the copper-iron alloy stove 8.
2, put forward the copper-iron alloy flow process: flow into from the slag 7 of carrying copper stove 2 and carry in the copper-iron alloy stove 8.Reductive agent II 15 is a water vapor, sprays in the stove through spray gun, and an end of spray gun immerses in the molten bath, and the molten bath is produced the intensive stirring action, and slag 7 and reductive agent II 15 are mixed.Pure oxygen 16 is blown into from carrying copper-iron alloy stove 8 bottoms, and the mode of bottom blowing has been strengthened the stirring action to the molten bath, can add the speed of fast response.The heat of high temperature that reaction produces provides reaction needed reduction heat by radiation, conduction, and the temperature maintenance in molten bath is at 1600 ℃.Coal gas of high temperature 9 parts of about 1700 ℃ that produce offer 2 insulations of copper stove, and another part goes waste heat boiler 10 to carry out heat recovery.In carrying copper-iron alloy stove 8, the principal reaction that molten bath and secondary combustion zone take place is as follows:
FeO+C=Fe+CO
Fe2SiO4+2C=2Fe+SiO2+2CO
Cu2S+CaO+aC=2Cu+CaS+(2a-1)CO+(1-a)CO2
2CO+O2=2CO2
The copper-iron alloy 12 that produces is discharged by following outlet, and waste is discharged by top outlet, enters pelletizer 11 and carries out the liquid slag non-slurry pelletizing.
3, high temperature sludge waste heat recovery: from carrying the part coal gas of high temperature 9 that the copper-iron alloy stove comes out, enter waste heat boiler 10 and carry out heat exchange, the steam that produces after the heat exchange promotes steam turbine 17 generatings, supplies with required user 18.Low temperature coal gas after the heat exchange is after sack cleaner 19 gathers dust, and part is as carrying copper and carrying the auxiliary material that needs in the copper-iron alloy and decompose thermal source 20, and rest parts is removed steam turbine power generation 21.The dust of collecting through sack cleaner 19 then enters grey dust recovery system 22.
Claims (6)
1. a molten copper slag comprehensive utilization process is characterized in that, it comprises that low temperature is put forward copper process, high temperature is put forward copper-iron alloy operation and waste heat recovery operation; Wherein,
Low temperature is carried copper and is carried the copper stove for 1270 ℃-1370 ℃ thermal molten copper slag of copper smelting furnace discharge is sent into; Add excessive reductive agent I gac and CaO subsequently; In carrying the copper stove, spray into the pressurized inert gas of 20kpa-30kpa then, and utilize the gas of inert gas torch ejection that the molten bath is produced stirring action; Reduction back copper water is collected, and slag is sent into high temperature and put forward the copper-iron alloy operation;
Put forward the copper-iron alloy operation, send into from the slag of carrying the copper stove and carry in the copper-iron alloy stove, excessive reductant II water vapor is sent in the stove by spray gun, spray gun one end immerses in the molten bath, and the molten bath is produced stirring action, and slag and reductive agent are mixed; Pure oxygen is blown into from carrying the copper-iron alloy furnace bottom, equally the molten bath is produced stirring action; Bath temperature is between 1500 ℃-1600 ℃, and a coal gas of high temperature part of 1600 ℃-1700 ℃ of generation is proposed the insulation of copper stove for sending into, and another part send the waste heat recovery operation.
2. molten copper slag comprehensive utilization process as claimed in claim 1 is characterized in that, described waste heat recovery operation is sent high-temperature flue gas into preboiler and carried out heat exchange, and the steam that produces after the heat exchange is sent into steam turbine generating, electrical energy fed user; Low temperature coal gas after the heat exchange is after dedusting, respectively as carrying copper and carrying the auxiliary material that needs in the copper iron and decompose thermal source; Remainder is also sent to steam turbine power generation; The dust of collecting after the dedusting is sent into grey dust recovery system.
3. molten copper slag comprehensive utilization process as claimed in claim 1 is characterized in that, described CaO preheating temperature is between 650 ℃-750 ℃.
4. the described molten copper slag comprehensive utilization process of claim 1 system is characterized in that, it comprises carries the copper stove, carries copper stove feed end and is connected with thermal molten copper slag, carries the copper stove simultaneously and also is provided with reductive agent I and inert gas torch, and spray gun is terminal to be immersed in the molten bath; Carry copper stove bottom and be provided with the copper water out, carry copper stove slag outlet by pay-off with carry copper-iron alloy stove feed end and be connected, CaO carries the copper stove by the batch can adding; Carry the copper-iron alloy stove and be provided with reductive agent II and add spray gun, this spray gun is terminal to be immersed in molten bath, carries the copper-iron alloy furnace bottom and is provided with pure oxygen and blows rifle; Carry the copper-iron alloy stove and be provided with copper-iron alloy relief outlet and waste relief outlet, the waste relief outlet is connected with prilling granulator; A high-temperature flue gas part of carrying the copper-iron alloy stove is sent into by pipeline and is carried the copper stove, and another part high-temperature flue gas is sent into bootstrap system; Bootstrap system comprises heat-exchanger rig, and heat-exchanger rig is connected with steam turbine, and steam turbine is connected with the user; Heat-exchanger rig also is connected with cleaning apparatus simultaneously, and cleaning apparatus is connected with grey dust recovery system, and the flue gas part of collection is decomposed thermal source as auxiliary material, and another part is sent into steam turbine power generation.
5. molten copper slag comprehensive utilization process as claimed in claim 4 system is characterized in that described heat-exchanger rig is a waste heat boiler; Described cleaning apparatus is a sack cleaner.
6. molten copper slag comprehensive utilization process as claimed in claim 4 system is characterized in that described prilling granulator is a pelletizer.
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| CN102051428B (en) * | 2011-01-20 | 2012-02-08 | 西安建筑科技大学 | Iron extracting and steelmaking process for comprehensively treating copper ore tailing and nickel molten slag |
| CN102230091A (en) * | 2011-06-13 | 2011-11-02 | 中国恩菲工程技术有限公司 | Oxygen-enriched bottom-blown matte smelting furnace and oxygen-enriched bottom-blown matte smelting technology |
| CN102242277B (en) * | 2011-06-13 | 2012-10-10 | 中国恩菲工程技术有限公司 | Oxygen-rich bottom blown copper smelter and oxygen-rich bottom blown technology for extraction of copper |
| CN102851513A (en) * | 2012-09-14 | 2013-01-02 | 金川集团股份有限公司 | Method for recovering valuable metals from nickel-copper molten slag through selective reduction |
| CN103537480B (en) * | 2013-10-31 | 2015-07-22 | 昆明理工大学 | Low-carbon comprehensive utilization method of copper slag after smelting reduction |
| CN103952564B (en) * | 2014-03-31 | 2016-02-24 | 中国恩菲工程技术有限公司 | Copper weld pool Slag treatment method |
| CN105838870B (en) * | 2016-05-24 | 2018-07-03 | 江苏省冶金设计院有限公司 | Prepare system and its application of reduced iron |
| CN107604118A (en) * | 2017-10-26 | 2018-01-19 | 江苏省冶金设计院有限公司 | Handle the equipment that molten state copper ashes produces high-quality iron |
| CN110090929B (en) * | 2019-05-14 | 2020-12-04 | 洛阳烟云涧青铜器有限公司 | Process for manufacturing antique bronze ware and smelting and roasting system thereof |
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| CN101736112A (en) * | 2009-12-25 | 2010-06-16 | 昆明理工大学 | Method for fusing and reducing iron from copper residue by blowing inert gas |
| CN101824505A (en) * | 2010-05-10 | 2010-09-08 | 昆明理工大学 | Method for producing low-sulfur molten iron in one step by smelting and reducing copper slag |
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| CN101736112A (en) * | 2009-12-25 | 2010-06-16 | 昆明理工大学 | Method for fusing and reducing iron from copper residue by blowing inert gas |
| CN101824505A (en) * | 2010-05-10 | 2010-09-08 | 昆明理工大学 | Method for producing low-sulfur molten iron in one step by smelting and reducing copper slag |
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