CN105087955A - Method for directly producing blister copper through copper concentrate - Google Patents

Method for directly producing blister copper through copper concentrate Download PDF

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Publication number
CN105087955A
CN105087955A CN201510548393.4A CN201510548393A CN105087955A CN 105087955 A CN105087955 A CN 105087955A CN 201510548393 A CN201510548393 A CN 201510548393A CN 105087955 A CN105087955 A CN 105087955A
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China
Prior art keywords
copper
matte
vacuum chamber
ore concentrates
reaktionsofen
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CN201510548393.4A
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Chinese (zh)
Inventor
尚心河
巩兰停
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Guilin Changxin Machinery Manufacturing Co Ltd
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Guilin Changxin Machinery Manufacturing Co Ltd
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Priority to CN201510548393.4A priority Critical patent/CN105087955A/en
Publication of CN105087955A publication Critical patent/CN105087955A/en
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Abstract

The invention provides a method for directly producing blister copper through copper concentrate. The method includes the steps that the copper concentrate, copper sulphate, a sludging flux, oxygen-enriched air and a heat absorption material are added into an upper section of the top of a reaction furnace, and a reducing agent is added into space of a lower section of the reaction furnace; generated incandescence coke and liquid phase furnace slag are guided into an electric furnace, the copper concentrate is added for reacting, and the electric furnace slag and a copper sulphate solution are generated; the copper sulphate solution is added into a matte pool, a vacuum pump is started to evacuate a vacuum chamber, and the copper sulphate enters the vacuum chamber through a connecting pipe of the vacuum chamber; driving air is conveyed to a rising pipe of the connecting pipe, and circulating flow is formed between the matte pool and the vacuum chamber after the copper sulphate solution passes through the rising pipe and a dropping pipe of the connecting pipe; and the vacuum chamber is closed, the driving air stops to be led into the vacuum chamber, and the obtained copper sulphate solution is palletized. The reducing agent is added into the space of the lower section of the reaction furnace and does not burn, so that heat loads of the reaction furnace are not increased.

Description

A kind of method of copper ore concentrates direct production blister copper
Technical field
The present invention relates to non-ferrous metal metallurgy technical field, be specifically related to a kind of method of copper ore concentrates direct production blister copper.
Background technology
At present, the scale degree of Copper making industry is increasing, and best slected copper ore deposit quantity sharply reduces, and most cupper smelting faces the problem processing high composition brass concentrate.In high composition brass concentrate, foreign matter content is high, its through can in the melting of desulfurization deironing and the blister copper that can obtain after the blowing of desulfurization deironing foreign matter content too high, and blister refining mainly removes the sulphur in blister copper, blister refining is to lead, zinc, arsenic, antimony, removing of the impurity such as bismuth is limited in one's ability, cause the lead in blister copper, zinc, arsenic, antimony, the impurity such as bismuth proceed in anode copper, the anode copper of high impurity content causes follow-up electrorefining to occur that bath voltage is too high, the passivation of anode big area, in electrolytic solution, the floating anode sludge is too much, the problem of the long particle of cathode plate, be unfavorable for that electrorefining carries out smoothly.
In sum, how a kind of smelting process being applicable to high composition brass concentrate is provided, to reduce the content of the impurity such as lead, zinc, arsenic, antimony, bismuth in blister copper, guarantee that in the anode copper that blister refining obtains, foreign matter content is few, and then guarantee to carry out smoothly for anode electrolytic copper refining, and a kind of smelting device being applicable to high composition brass concentrate how is provided to be those skilled in the art's problem demanding prompt solutions.
Summary of the invention
The problem that the present invention solves is a kind of method providing copper ore concentrates direct production blister copper, can process the low-grade copper concentrate of high Fe, low Cu, reduces the oxygen consuming amount of Reaktionsofen, thermal load and slag amount, improves the character of Reaktionsofen slag.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of method of copper ore concentrates direct production blister copper, comprises the steps:
Copper ore concentrates, copper matte regulus, sludging flux, oxygen-rich air, heat absorption material are added in Reaktionsofen by Reaktionsofen top simultaneously;
In the hypomere space of described Reaktionsofen, add reductive agent, in the molten bath bottom Reaktionsofen, form furnace gas, the red-hot coke layer of solid phase, the slag layer of liquid phase, the blister copper layer of liquid phase;
The slag of the red-hot coke generated, liquid phase is imported in electric furnace, in electric furnace, adds vulcanizing agent simultaneously and react, generate electric-furnace slag and copper matte regulus solution;
Preheating vacuum chamber and matte pond, then copper matte regulus liquation is added in described matte pond;
Open described vacuum pump and the vacuum chamber that is communicated with described vacuum pump of finding time, flow in described vacuum chamber to make the copper matte regulus liquation in described matte pond by the connecting leg of described vacuum chamber;
By the driving gas access port feed drive gas of upcast in described connecting leg, constantly spray in described vacuum chamber by described upcast to drive the copper matte regulus liquation in described matte pond, flowed back in described matte pond by the downtake of described connecting leg, formation circulates again;
In described matte pond, extract copper matte regulus liquation sample, and check every foreign matter content in this sample whether up to standard: if not up to standard, then described copper matte regulus solution is entered in Reaktionsofen by described Reaktionsofen overhead reflux; If every foreign matter content is up to standard in described Yang Ping, then close described vacuum pump and stop passing into driving gas, impurity is removed complete, and is granulated by the copper matte regulus solution of gained.
The invention provides a kind of method of copper ore concentrates direct production blister copper, in the space of the hypomere anaerobic of Reaktionsofen, add reductive agent, reductive agent cannot burn, and does not increase the thermal load of Reaktionsofen; Snperoxiaized Cu 2o and Fe 3o 4be reduced in Reaktionsofen, improve the direct yield of copper, reduce slag containing Cu 2o and Fe 3o 4, the character of slag being improved, advantageously by controlling the thickness of red-hot coke layer, just can control slag containing Cu 2o and Fe 3o 4amount; Slag and red-hot coke are imported electric furnace, add vulcanizing agent again, obtain copper matte regulus solution, again copper matte regulus solution is imported to matte pond and vacuum chamber internal circulation flow, impurity to be driven by driving gas with copper matte regulus liquation thus constantly sprays in vacuum chamber, during owing to spraying into, the degassed interface of copper matte regulus liquation enlarges markedly, the impurity such as lead, zinc, arsenic, antimony, bismuth are made to volatilize fast with the form of simple substance or sulfide and be extracted out vacuum chamber by vacuum pump, thus reach the effect removing above-mentioned various impurity, reduce the content of impurity in matte.Compared to the smelting process of existing copper ore concentrates, smelting process provided by the invention adds copper matte regulus solution dedoping step, be beneficial to the content of impurity in the blister copper obtained after reducing blowing, and then the content of the impurity such as lead, zinc, arsenic, antimony, bismuth in the anode copper product reducing blister refining, guarantee to produce for anode electrolytic copper refining to carry out smoothly, prevent from occurring during electrorefining that bath voltage is too high, the passivation of anode big area, the problem of too much, the long particle of cathode plate of the floating anode sludge in electrolytic solution.To sum up, the smelting process of copper refining provided by the invention is applicable to the high copper ore concentrates of foreign matter content.
Accompanying drawing explanation
The schema of the method for the copper ore concentrates direct production blister copper that Fig. 1 provides for the embodiment of the present invention
The structural representation of the smelting device of the method for the copper ore concentrates direct production blister copper that Fig. 2 provides for the embodiment of the present invention.
Embodiment
In order to understand the present invention further, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should be appreciated that these describe just for further illustrating the features and advantages of the present invention, instead of limiting to the claimed invention.
The invention provides a kind of method of copper ore concentrates direct production blister copper, its step please refer to Fig. 1, the smelting device structural representation of the extraction blister copper that Fig. 2 provides for a kind of embodiment of the present invention.
Reaktionsofen of the present invention adopts space to revolve floating Reaktionsofen 1, the top that copper ore concentrates, copper matte regulus, sludging flux, oxygen-rich air, heat absorption material revolve floating Reaktionsofen 1 by space is simultaneously joined by swirl nozzle the inside that floating Reaktionsofen is revolved in space, the mass ratio that adds of copper ore concentrates and copper matte regulus, sludging flux, heat absorption material is 7 ~ 9: 1 ~ 2: 1, sludging flux is that this area is commonly used, such as SiO 2, oxygen-rich air is 300Nm relative to the add-on of copper ore concentrates 3/ t ~ 700Nm 3/ t, volumetric concentration>=45% of oxygen in oxygen-rich air, heat absorption material can be space and revolves the flue dust collected in the furnace gas of floating Reaktionsofen 1 discharge
Revolve in space in floating Reaktionsofen, by copper ore concentrates produce blister copper time in fact by Cu 2the ratio that S direct oxidation generates blister copper is very little, less than 10%wt, mainly by snperoxiaized Cu 2o and Fe 3o 4with under-oxidized Cu 2the cross reaction of S generates blister copper, so the collision that will strengthen superoxide and oxygen debt compound is in conjunction with probability.Oxygen in the epimere space 11 that floating Reaktionsofen is revolved in space in oxygen-rich air and the sulphur in copper ore concentrates and iron react oxygen depletion, generating portion blister copper, superoxide and oxygen debt compound, space, stage casing 12 endoperoxide and the oxygen debt compound of revolving floating Reaktionsofen in following space are collided, be polymerized also cross reaction removes the sulphur in oxygen debt compound, produces most of blister copper simultaneously.
Still a large amount of Cu is had after having reacted 2o and Fe 3o 4exist, usual Cu in slag 2o will more than 20%wt, Fe 3o 4more than 30%wt.For eliminating this two kinds of material disadvantageous effects, the present invention proposes the granular reductive agent importing copper ore concentrates weight 3% ~ 5 in the hypomere space 13 that floating Reaktionsofen is revolved in space, reductive agent is preferably granular coke, granularity is 2mm ~ 25mm, and coke joins space by simple emission of baiting chute or spray gun and revolves in the hypomere space 13 of floating Reaktionsofen.In hypomere space 13, the oxygen in the oxygen-rich air added by top is consumed, and granular reductive coke agent enters can not burn after in stove and increase the thermal load of Reaktionsofen, but will absorb heat heating self, has certain cooling effect.When after the coke heat absorption added, own temperature raises, because coke granule degree can not be taken away by air-flow more greatly, but fall in the molten bath 14 of revolving bottom floating Reaktionsofen 1 in space, because its proportion is little, the red-hot coke layer 21 of the top layer formation solid phase finally in molten bath 14.Work as Cu 2o and Fe 3o 4when being dropped through red-hot coke layer 21, Cu 2o is reduced into blister copper by C, Fe 3o 4be reduced into FeO by C, improve the direct yield that slag turn improves blister copper.Therefore phase is separately formed in final melt pool, namely containing SO 2furnace gas, solid phase red-hot coke layer 21, the slag layer 22 of liquid phase and copper matte regulus liquation layer 23.Copper matte regulus liquation is by the Cu in copper ore concentrates and copper matte regulus 2s direct oxidation, Cu 2the cross reaction of S and superoxide, snperoxiaized Cu 2o is by red-hot reductive coke gained.
Space revolve that floating Reaktionsofen 1 generates containing SO 2furnace gas can be incorporated into acid plant relieving haperacidity by the funnel uptake 15 of Reaktionsofen after cooling, dedusting, and reaction process has a certain amount of CO produces and be mixed in furnace gas, not containing CO during for ensureing that furnace gas is discharged by Reaktionsofen, avoid the impact on follow-up acid making system, in funnel uptake 15, preferably also feed the oxygen-rich air that CO is burnt, also can eliminate the bonding in funnel uptake exit.
Preheating vacuum chamber 101 and matte pond 103, then copper matte regulus liquation is added in matte pond 103; The copper matte regulus liquation layer of bottommost imports matte pond 103 by chute, carries out blister refining.
Preheating vacuum chamber 101 can avoid matte in subsequent step, and by vacuum chamber 101 temperature affects, occurrence temperature reduces, and volatilizees smoothly when guaranteeing that impurity can spray into vacuum chamber 101 with matte in subsequent step.
Open the vacuum chamber 101 that vacuum pump finding time is communicated with vacuum pump, to make the copper matte regulus liquation in matte pond 103 by the connecting leg inflow vacuum chamber 101 of vacuum chamber 101.
The connecting leg of vacuum chamber 101 stretches into below the liquid level of copper matte regulus liquation in matte pond 103, opens after vacuum pump, and in vacuum chamber 101, gas reduces gradually, air pressure reduces gradually, and matte flows into vacuum chamber 101 by connecting leg under atmospheric pressure.
By the driving gas access port feed drive gas of upcast in connecting leg 112, to drive the copper matte regulus liquation in matte pond 103 constantly to be sprayed in vacuum chamber 101 by upcast 112, then flowed back in matte pond 103 by the downtake 111 of connecting leg, formation circulates.
After passing into driving gas, be heated after matte in driving gas contact upcast 112 and isothermal expansion occurs, and then produce a large amount of bubble, a large amount of bubble constantly drives matte to spray in vacuum chamber 101 tempestuously, degassed interface is enlarged markedly, thus impel the impurity in matte (as lead, zinc, arsenic, antimony, bismuth etc.) to volatilize fast under the effect at large degassed interface, copper matte regulus liquation is purified; Subsequently, the copper matte regulus liquation purified is fallen after rise by the downtake 111 of connecting leg and impacts the copper matte regulus liquation in matte pond 103 energetically under self gravitation effect, reach mixing effect, make both (the copper matte regulus liquation in the copper matte regulus liquation namely refluxed by vacuum chamber 101 and matte pond 103) short mix, and again entered in vacuum chamber 101 by upcast 112 and purify, matte like this is formed and circulates between matte pond 103 and vacuum chamber 101.In addition, state is held open at copper matte regulus liquation circulation process process intermediate pump, thus constantly the gaseous impurities of the driving gas entered in vacuum chamber 101 and volatilization in vacuum chamber 101 is extracted out, guarantee that matte acutely can be sprayed in vacuum chamber 101 constantly by upcast 112
To check in this matte pond every foreign matter content in copper matte regulus liquation sample whether up to standard; If not up to standard, then described copper matte regulus solution is entered in Reaktionsofen by described Reaktionsofen overhead reflux.If every foreign matter content is up to standard in described Yang Ping, then close described vacuum pump and stop passing into driving gas, impurity is removed complete.Obtained copper matte regulus solution is imported to the grinding machine 1111 with functions/drying, such as Raymond mill, carry out pelletizing technology.Pelletizing technology refers to traditional water quenching technology, the atomization process of improvement and the anhydrous granulating technique of dry method, preferred anhydrous granulating technique.
Above the method for a kind of copper ore concentrates direct production blister copper provided by the present invention is described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.

Claims (10)

1. a method for copper ore concentrates direct production blister copper, is characterized in that, comprises the steps:
Step S101, copper ore concentrates, copper matte regulus, sludging flux, oxygen-rich air, heat absorption material are added the epimere of Reaktionsofen, in the hypomere space of Reaktionsofen, add reductive agent;
Step S102, the slag of the red-hot coke generated, liquid phase to be imported in electric furnace, and add vulcanizing agent and react, generate electric-furnace slag and copper matte regulus solution;
Step S103, copper matte regulus solution is joined in matte pond, open vacuum pump vacuum chamber, make the copper matte regulus solution in matte enter in vacuum chamber by the connecting leg of vacuum chamber;
Step S104, to feed drive gas in the upcast of described connecting leg, to drive the copper matte regulus solution in described matte pond constantly to be sprayed in described vacuum chamber by described upcast, then flowed back in described matte pond by the downtake of described connecting leg, formation circulates;
Step S105, in described matte pond, extract copper matte regulus solution example, and check every foreign matter content in this sample whether up to standard; If not up to standard, then described copper matte regulus solution is entered in Reaktionsofen by described Reaktionsofen overhead reflux; If up to standard, then close described vacuum pump and stop passing into driving gas, impurity is removed complete, by the copper matte regulus solution granulation obtained, finally obtains blister copper.
2. the method for a kind of copper ore concentrates direct production blister copper as claimed in claim 1, it is characterized in that, in described step S101, the mass ratio that adds of copper ore concentrates and copper matte regulus, sludging flux, heat absorption material is 7 ~ 9: 1 ~ 2: 1, and described oxygen-rich air is 300Nm relative to the add-on of copper ore concentrates and copper matte regulus 3/ t ~ 700Nm 3/ t, volumetric concentration>=45% of oxygen in described oxygen-rich air.
3. the method for a kind of copper ore concentrates direct production blister copper as claimed in claim 1, is characterized in that, in described step S101 Reaktionsofen funnel uptake in import the CO generated in Reaktionsofen described in Air combustion with oxygen enrichment.
4. the method for a kind of copper ore concentrates direct production blister copper as claimed in claim 1, it is characterized in that, in described step S101, reductive agent is granular coke, and granularity is 2mm ~ 25mm, and the amount added is 3% ~ 5% of copper ore concentrates weight.
5. the method for a kind of copper ore concentrates direct production blister copper as claimed in claim 1, it is characterized in that, in described step S102, vulcanizing agent is Sulfide Cu concentrate, moisture 4%wt ~ 10%wt, and the mass ratio of the slag of described Sulfide Cu concentrate and described liquid phase is 4 ~ 6: 1.
6. the method for a kind of copper ore concentrates direct production blister copper as claimed in claim 1, is characterized in that, in described step S102 electric-furnace slag after granulation as other industrial raw material.
7. the method for a kind of copper ore concentrates direct production blister copper as claimed in claim 1, it is characterized in that, further comprising the steps of in described copper matte regulus solution removal step S103: before opening vacuum pump, heating copper matte regulus solution to 1100 DEG C-1400 DEG C, and the temperature maintaining the flowing of copper matte regulus solution circulated is 1100 DEG C-1400 DEG C.
8. the method for a kind of copper ore concentrates direct production blister copper as claimed in claim 1, it is characterized in that, it is characterized in that, in described step S104: the flow that matte liquation circulates is 50t/min-100t/min, the duration circulated is 20min-60min; In vacuum chamber, vacuum tightness is 10Pa-10000Pa.
9. the method for a kind of copper ore concentrates direct production blister copper as claimed in claim 1, is characterized in that, in described step S104: described driving gas is nitrogen or rare gas element.
10. the method for a kind of copper ore concentrates direct production blister copper as described in any one of claim 1 to 9, is characterized in that, Reaktionsofen is that control revolves floating Reaktionsofen described in described step S101.
CN201510548393.4A 2015-08-31 2015-08-31 Method for directly producing blister copper through copper concentrate Pending CN105087955A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009077651A1 (en) * 2007-12-17 2009-06-25 Outotec Oyj Method for refining copper concentrate
CN102605191A (en) * 2012-04-16 2012-07-25 阳谷祥光铜业有限公司 Method for directly producing row copper by copper concentrate
CN103498058A (en) * 2013-09-09 2014-01-08 杨先凯 Technology and apparatus for removing lead, zinc, arsenic, antimony, bismuth and tin from matte

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009077651A1 (en) * 2007-12-17 2009-06-25 Outotec Oyj Method for refining copper concentrate
CN102605191A (en) * 2012-04-16 2012-07-25 阳谷祥光铜业有限公司 Method for directly producing row copper by copper concentrate
CN103498058A (en) * 2013-09-09 2014-01-08 杨先凯 Technology and apparatus for removing lead, zinc, arsenic, antimony, bismuth and tin from matte

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Application publication date: 20151125