CN106399682A - Method for extracting valuable metal from copper, cobalt and nickel sulfide - Google Patents

Method for extracting valuable metal from copper, cobalt and nickel sulfide Download PDF

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Publication number
CN106399682A
CN106399682A CN201610849662.5A CN201610849662A CN106399682A CN 106399682 A CN106399682 A CN 106399682A CN 201610849662 A CN201610849662 A CN 201610849662A CN 106399682 A CN106399682 A CN 106399682A
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China
Prior art keywords
leaching
valuable metal
gaseous
copper
carried
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CN201610849662.5A
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Chinese (zh)
Inventor
陆业大
李少龙
殷书岩
聂颖
傅建国
董爱国
刘诚
孙宁磊
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中国恩菲工程技术有限公司
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Priority to CN201610849662.5A priority Critical patent/CN106399682A/en
Publication of CN106399682A publication Critical patent/CN106399682A/en

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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/04Extraction of metal compounds from ores or concentrates by wet processes by leaching
    • C22B3/06Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
    • C22B3/08Sulfuric acid, other sulfurated acids or salts thereof
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00Obtaining copper
    • C22B15/0063Hydrometallurgy
    • C22B15/0065Leaching or slurrying
    • C22B15/0067Leaching or slurrying with acids or salts thereof
    • C22B15/0071Leaching or slurrying with acids or salts thereof containing sulfur
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00Obtaining copper
    • C22B15/0063Hydrometallurgy
    • C22B15/0084Treating solutions
    • C22B15/0086Treating solutions by physical methods
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B23/00Obtaining nickel or cobalt
    • C22B23/04Obtaining nickel or cobalt by wet processes
    • C22B23/0407Leaching processes
    • C22B23/0415Leaching processes with acids or salt solutions except ammonium salts solutions
    • C22B23/043Sulfurated acids or salts thereof
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B23/00Obtaining nickel or cobalt
    • C22B23/04Obtaining nickel or cobalt by wet processes
    • C22B23/0453Treatment or purification of solutions, e.g. obtained by leaching
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/22Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, by thermal decomposition
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

The invention provides a method for extracting valuable metal from copper, cobalt and nickel sulfide. The method includes the steps that oxygen is introduced into ore pulp containing the copper, cobalt and nickel sulfide to perform pressurized oxygen leaching, and leaching liquid and leaching slag are obtained; and the leaching liquid is subjected to flash evaporation, gas products and liquid products containing the valuable metal are obtained. By means of a pressurized oxygen leaching manner, the valuable metal in the copper, cobalt and nickel sulfide is effectively leached out, iron, aluminum and other impurities are inhibited in the leaching slag while a high copper, cobalt and nickel leaching rate is acquired, the purity degree of the valuable metal in the leaching liquid is improved to a certain degree, and the impurity removing cost of the subsequent working procedure is reduced. By performing the flash evaporation treatment manner on the leaching liquid, gas and heat in the leaching liquid containing the valuable metal is separated from the valuable metal, and therefore the gas and the heat can be conveniently recycled, and the energy source and energy consumption is reduced. The method has the beneficial effects of being high in valuable metal leaching rate, low in energy consumption, wide in raw material application range, reliable in process and low in investment cost.

Description

The method extracting valuable metal from copper cobalt nickel sulfide
Technical field
The present invention relates to hydrometallurgy field, extract valuable metal from copper cobalt nickel sulfide in particular to one kind Method.
Background technology
Existing copper cobalt sulfide is processed using roasting technique mostly, and this technique requires higher, content mistake to sulfur content Low, sulfur cannot realize self-heating, needs auxiliary heating system;In addition in roasting process cobalt loss more serious so that the cobalt response rate Low;And the concentration of valuable metal that obtains of roasting low it is difficult to reclaim.Additionally, sulfur-containing smoke gas discharge to environment in roasting process Seriously polluted, environment protecting is poor.Also need in roasting process more huge fuel preparation system, Roasting Kiln System, at flue gas Reason system etc., the investment of these equipment is larger.
Therefore it is still necessary to improve to prior art to solve valuable metal in copper cobalt sulfide of the prior art Extracting method has that efficiency low cost is high.
Content of the invention
Present invention is primarily targeted at providing a kind of method extracting valuable metal cobalt nickel sulfide from copper, to solve In copper cobalt sulfide of the prior art, the extracting method of valuable metal has that efficiency low cost is high.
To achieve these goals, according to an aspect of the invention, it is provided one kind is extracted from copper cobalt nickel sulfide The method of valuable metal, the method includes:It is passed through oxygen in the ore pulp containing copper cobalt nickel sulfide and carries out pressure leaching, obtain Leachate and leached mud;And flash distillation is carried out to leachate, obtain gaseous product and the product liquid containing each valuable metal.
Further, the extraction temperature of pressure leaching is 160~220 DEG C, preferably 180~210 DEG C.
Further, the leaching pressure of pressure leaching is 1.2~3.0Mpa.
Further, in the step of pressure leaching, the partial pressure of oxygen is 0.3~1.0Mpa, preferably 0.5~1.0Mpa.
Further, the extraction time of pressure leaching is 1~3h.
Further, the terminal acidity of pressure leaching step is 10~60g/L.
Further, after obtaining gaseous product, method also includes:Gas purification and heat recovery are carried out to gaseous product Step.
Further, gas purification is carried out to gaseous product and the step of heat recovery includes:Gaseous product is washed So that gas is discharged after washing, obtain washing liquid;Washing liquid and mill solution to be heated are carried out heat exchange, after being heated mill solution and Cooling wash water.
Further, using fresh water (FW) or system anti-liquid, gaseous product is washed in washing step.
Further, in pressure leaching process step, also include the ore pulp containing copper cobalt nickel sulfide is stirred Step, the speed of stirring is 30~100 turns/min.
Application technical scheme, to the valuable metal in copper cobalt nickel sulfide by way of using pressure leaching Effectively leached, while obtaining higher copper cobalt nickel leaching rate, the impurity such as ferrum, aluminum are suppressed in leached mud, to a certain degree On improve the purity of valuable metal in leachate, reduce subsequent handling removal of impurities cost.Then by being dodged leachate The processing mode steamed, the gas in the leachate containing valuable metal and heat are separated with valuable metal, consequently facilitating right Gas and heat are reclaimed, and reduce the energy and energy expenditure.The method has that valuable metal leaching rate is high, energy consumption is low, raw material Wide accommodation, process and the low advantage of cost of investment.
Specific embodiment
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases Mutually combine.To describe the present invention below in conjunction with embodiment in detail.
Copper cobalt nickel sulfide in the application refers to the sulfur of at least one or more of element in three kinds of elements of cupric cobalt nickel Compound, can be cupric, the sulfide of cobalt, nickel or the mixing of copper cobalt nickel of various grades.Wherein, copper, cobalt, three kinds of elements of nickel are Valuable metal element.
As background technology is previously mentioned, in prior art when separating the valuable metals such as copper cobalt nickel from copper cobalt nickel sulfide There is the low defect of cost high efficiency, for improving this situation, in a kind of typical embodiment of the application, there is provided a kind of The method extracting valuable metal from copper cobalt nickel sulfide, the method includes:It is passed through in the ore pulp containing copper cobalt nickel sulfide Oxygen carries out pressure leaching, obtains leachate and leached mud;Flash distillation is carried out to leachate, obtains gaseous product and containing respectively there being valency gold The product liquid belonging to.
In above-mentioned pressure leaching step, the main chemical reactions of generation are as follows:
CoS+2O2=CoSO4
CuFeS2+4O2=CuSO4+FeSO4
NiS+2O2=CoSO4
FeS2+15O2+2H2O=2Fe2(SO4)3+2H2SO4
4FeSO4+O2+2H2SO4=2Fe2(SO4)3+2H2O;
4FeSO4+O2+4H2O=4H2SO4+2Fe2O3
Fe2(SO4)3+3H2O=Fe2O3+3H2SO4
3Al2O3·3H2O+4H2SO4=2 (H3O)Al3(OH)6(SO4)2+4H2O.
Note:Aluminum is precipitate.
Formula can be seen that course of reaction except being its corresponding sulfate by the sulfide-oxidation of copper cobalt nickel from the reactions above Outward, ferrum and/or alumina matter can also be also converted to its corresponding sulfate or oxide, hydroxide form, thus will have Valency metal is realized effectively leaching.
The said method of the application, is carried out to the valuable metal in copper cobalt nickel sulfide by way of using pressure leaching Effectively leach, suppress, in leached mud, to carry to a certain extent by impurity such as ferrum, aluminum while obtaining higher copper cobalt nickel leaching rate In high leachate, the purity of valuable metal, reduces subsequent handling removal of impurities cost.Then by leachate is carried out flash distillation Processing mode, the gas in the leachate containing valuable metal and heat are separated with valuable metal, consequently facilitating to gas And heat is reclaimed, reduce the energy and energy expenditure.The method has that valuable metal leaching rate is high, energy consumption is low, raw material suitable Answer that scope is wide, process and the low advantage of cost of investment.
In the step of above-mentioned pressure leaching, according to existing, the temperature of leaching leaches that copper cobalt nickel is temperature required to be adjusted Obtain.In a kind of preferred embodiment of the application, the extraction temperature of pressure leaching is 160~220 DEG C.Pressurizeed at a temperature of being somebody's turn to do Oxygen leaching can make the leaching rate of copper cobalt nickel higher, and the impurity such as ferrum, aluminum are suppressed in leached mud.
In the step of above-mentioned pressure leaching, the pressure of leaching is adjusted according to existing leaching copper cobalt nickel desirable pressure Obtain.In a kind of preferred embodiment of the application, the leaching pressure of pressure leaching is 1.2~3.0Mpa.Carry out under this pressure adding Pressure oxygen leaching can make the leaching rate of copper cobalt nickel higher.
It is capable of the effective leaching to copper cobalt nickel in above-mentioned total pressure limit, in order to improve oxygen utilization further Rate, improves leaching efficiency, and in the application another kind preferred embodiment, in the step of above-mentioned pressure leaching, the partial pressure of oxygen is 0.3~1.0Mpa.The partial pressure of wherein oxygen is controlled to have for 0.3~1.0Mpa under the conditions of leaching pressure is for 1.2~3.0Mpa Help control the oxidation effectiveness of sulfide.
In the step of above-mentioned pressure leaching, suitably adjusted according to the content height of valuable metal composition in copper cobalt nickel sulfide Extraction time.In this application, the extraction time of above-mentioned pressure leaching is 1~3h.Possibility can be entered within the scope of this extraction time Valuable metal is leached by ground, improves the leaching rate of valuable metal.
During pressure leaching, ferrum, aluminum are leached and the degree that converts is relevant with the amount of the oxygen being passed through, by oxygen It is passed through and makes ferrum fully oxidized and hydrolytic precipitation, aluminum is converted to double salt precipitation in high temperature system, thus effectively inhibiting ferrum, aluminum etc. The leaching rate of foreign metal.In a kind of preferred embodiment of the application, the terminal acidity of above-mentioned pressure leaching step is 10~ 60g/L.The terminal acidity Control of pressure leaching is had within the range and makes valuable metal leaching rate high and ferrum alumina matter leaches Rate is low, improves the beneficial effect of valuable metal purity in leachate.
In the said method of the application, carry out gas-liquid separation flash distillation is carried out to leachate, thus by leachate Gas and substantial amounts of heat are separated from valuable metal saline solution.In order to reduce the carrying of valuable metal of the application further Take or separation costs, in a kind of preferred embodiment of the application, after flash distillation obtains gaseous product, said method also includes: The step carrying out gas purification and heat recovery to gaseous product, reduces separating energy consumption and cost by reclaiming heat.
Gaseous product is carried out with gas purification and the step of heat recovery adopts existing heat recovery step, as long as It is capable of the purification of gas and recycling of heat.In order to improve the practicality of the separation method of the application further And energy utilization efficiency, in a kind of preferred embodiment of the application, gaseous product is carried out with gas purification and heat recovery Step includes:Gaseous product is carried out with washing makes gas discharge, and obtains washing liquid;Washing liquid and mill solution to be heated are carried out heat friendship Change, mill solution and cooling wash water after being heated.
Make gas not do particular determination by way of discharging to by washing in the application, any can make what gas discharged to wash Water is all applied to the application, as long as expellant gas meet emission request after can washing.Concrete species as wash water Reasonable selection can be carried out according to the actual state in producing.In the application another kind preferred embodiment, above-mentioned purge step Return liquid using fresh water (FW) or system in rapid gaseous product is washed.
Knowable to the above-mentioned reaction equation of the application, be difficult in the gaseous product (steam) flashing off containing solid particle and Acid drop, if directly discharge can be to environment.And using this wash water, gaseous product is washed, can not only be effective Wash entrained solid granule and acid drop in this portion gas product, reach the requirement of environment protection emission, and decrease and wash Water consumption, reduces system energy consumption.This wash water can also be by automatically controlling simultaneously, and heat according to required for system is outer is adjusted to be washed Water consumption.According to the difference needing the technique heating in actual condition, with the mill solution to be heated that washing liquid carries out heat exchange Concrete species also differs.
In above-mentioned pressure leaching process step, can improve to copper cobalt under conditions of said temperature, pressure and partial pressure of oxygen The leaching rate of nickel.The utilization rate of the oxygen in order to improve further, said method is also included to the ore deposit containing copper cobalt nickel sulfide Starch the step being stirred, the speed of stirring is 30~100 turns/min.Oxygen and the sulfide being passed through is made by way of stirring It is sufficiently mixed, and then make oxygen utilization in hgher efficiency.In addition to this it is possible to by apparatus structure that compressive reaction is located Improvement improving oxygen utilization rate, such as, if carrying out above-mentioned pressure leaching process with autoclave, can be inside autoclave Setting baffle plate, and improve oxygen be passed through a position, make oxygen and ore pulp counter current contacting, realizing the high oxidation to sulfide It is thus also avoided that the impact that causes of accumulation in autoclave for the solid material and fouling while rate, high oxygen utilization rate, effectively carry The high operating rate of autoclave system simultaneously decreases the consumption of oxygen.Oxygen utilization rate in course of reaction is made to reach more than 90%, Sulfide-oxidation rate reaches more than 95%.
According to the property of the temperature and pressure condition in above-mentioned pressure leaching step and product, can be used for into The device of the above-mentioned reaction of row, needs to meet the safety in the case of oxygen is passed through and the corrosion under the conditions of high temperature peracid Require, this sulfidic materials can be processed using corrosion-resistant, anti abrasive autoclave.
Similarly, in flash process, flash off and in substantial amounts of steam, contain solid particle and acid drop, easily right Pipe-line system and equipment cause improper abrasion and corrode, thus using there is acidproof, wear-resisting ceramic component and equipment is protected Protect corresponding process pipeline and equipment, contribute to the efficiency making flashing apparatus and single unit system holding more than 90%, from And improve process efficiency.
To further illustrate the beneficial effect of the application below in conjunction with specific embodiments.
The following example used copper cobalt nickel sulfide composition such as table 1 below.
Table 1
Element Cu/wt Co/wt Fe/wt Ni/wt S/wt
Copper cobalt sulfide 1 3.0% 2.0% 4.4% - 5.0%
Copper cobalt sulfide 2 15.2% 9.2% 12.7% - 24.6%
Copper cobalt nickel sulfide 3 1.2% 9.8% 9.83% 14.69% 24.5%
Copper-nickel sulphide 4 3.2% - 7.62% 10.06% 8.3%
First, copper cobalt sulfide 1 is used as raw material
Embodiment 1
180 DEG C of extraction temperature, corresponding kettle pressure is 1.45MPa, partial pressure of oxygen 0.5MPa, extraction time 2h, terminal acidity 10g/L.Each metal leaching rate such as table 2 below.
Flash distillation is carried out to each leachate, obtains gaseous product and valuable metal solution.Gas purification is carried out to gaseous product And heat recovery, concrete steps include:Using fresh water (FW) or system return liquid gaseous product is carried out washing make gas discharge, obtain Washing liquid;Washing liquid is carried out heat exchange with mill solution to be heated in system, mill solution and cooling wash water after being heated.
Table 2:
Element Cu Co Fe S
Leaching rate 98.5% 98% 4% 94%
Embodiment 2
210 DEG C of extraction temperature, corresponding kettle pressure 2.9MPa, partial pressure of oxygen 1.0MPa, extraction time 2h, terminal acidity 15g/L. Each metal leaching rate such as table 3 below.
Flash distillation is carried out to each leachate, obtains gaseous product and valuable metal solution.Gas purification is carried out to gaseous product And heat recovery, concrete steps include:Using fresh water (FW) or system return liquid gaseous product is carried out washing make gas discharge, obtain Washing liquid;Washing liquid is carried out heat exchange with thermal process solution to be added in system, mill solution and cooling wash water after being heated.
Table 3:
Element Cu Co Fe S
Leaching rate 99% 98.5% 3% 99%
2nd, copper cobalt sulfide 2 is used as raw material
Embodiment 3
180 DEG C of extraction temperature, corresponding kettle pressure is 1.5MPa, partial pressure of oxygen 0.5MPa, extraction time 2h, stirs in leaching process The speed mixed is 30 turns/min, terminal acidity 30g/L.Each metal leaching rate such as table 4 below.
Flash distillation is carried out to each leachate, obtains gaseous product and valuable metal solution.Gas purification is carried out to gaseous product And heat recovery, concrete steps include:Using fresh water (FW) or system return liquid gaseous product is carried out washing make gas discharge, obtain Washing liquid;Washing liquid is carried out heat exchange with mill solution to be heated in system, mill solution and cooling wash water after being heated.
Table 4:
Element Cu Co Fe S
Leaching rate 99% 99.5% 10% 95%
Embodiment 4
210 DEG C of extraction temperature, corresponding kettle pressure is 2.8MPa, partial pressure of oxygen 0.8MPa, extraction time 2h, stirs in leaching process The speed mixed is 100 turns/min, terminal acidity 40g/L.Each metal leaching rate such as table 5 below.
Flash distillation is carried out to each leachate, obtains gaseous product and valuable metal solution.Gas purification is carried out to gaseous product And heat recovery, concrete steps include:Using fresh water (FW) or system return liquid gaseous product is carried out washing make gas discharge, obtain Washing liquid;Washing liquid is carried out heat exchange with mill solution to be heated in system, mill solution and cooling wash water after being heated.
Table 5:
Element Cu Co Fe S
Leaching rate 99.5% 99.8% 4% 99%
3rd, (weight is than for 2 for copper cobalt sulfide 1,2 mixture:1) as raw material
Embodiment 5
220 DEG C of extraction temperature, corresponding kettle pressure is 3.0MPa, partial pressure of oxygen 0.9MPa, extraction time 2h, terminal acidity 20g/ L.Each metal leaching rate such as table 6 below.
Flash distillation is carried out to each leachate, obtains gaseous product and valuable metal solution.Gas purification is carried out to gaseous product And heat recovery, concrete steps include:Using fresh water (FW) or system return liquid gaseous product is carried out washing make gas discharge, obtain Washing liquid;Washing liquid is carried out heat exchange with mill solution to be heated in system, mill solution and cooling wash water after being heated.
Table 6:
Element Cu Co Fe S
Leaching rate 99% 99% 3% 99%
4th, copper cobalt nickel sulfide 3 is used as raw material
Embodiment 6
160 DEG C of extraction temperature, corresponding kettle pressure is 1.2MPa, partial pressure of oxygen 0.3MPa, extraction time 3h, terminal acidity 50g/ L.Each metal leaching rate such as table 7 below.
Flash distillation is carried out to each leachate, obtains gaseous product and valuable metal solution.Gas purification is carried out to gaseous product And heat recovery, concrete steps include:Using fresh water (FW) or system return liquid gaseous product is carried out washing make gas discharge, obtain Washing liquid;Washing liquid is carried out heat exchange with mill solution to be heated in system, mill solution and cooling wash water after being heated.
Table 7:
Element Cu Co Fe Ni S
Leaching rate 98.5% 99% 10% 99% 96%
Embodiment 7
210 DEG C of extraction temperature, corresponding kettle pressure is 2.8MPa, partial pressure of oxygen 1.0MPa, extraction time 1h, terminal acidity 35g/ L.Each metal leaching rate such as table 8 below.
Flash distillation is carried out to each leachate, obtains gaseous product and valuable metal solution.Gas purification is carried out to gaseous product And heat recovery, concrete steps include:Using fresh water (FW) or system return liquid gaseous product is carried out washing make gas discharge, obtain Washing liquid;Washing liquid is carried out heat exchange with mill solution to be heated in system, mill solution and cooling wash water after being heated.
Table 8:
Element Cu Co Fe Ni S
Leaching rate 99% 99.8% 4% 99.5% 99%
4th, copper cobalt nickel sulfide 4 is used as raw material
Embodiment 8
210 DEG C of extraction temperature, corresponding kettle pressure is 1.8MPa, partial pressure of oxygen 1.0MPa, extraction time 2.5h, terminal acidity 46g/L.Each metal leaching rate such as table 9 below.
Flash distillation is carried out to each leachate, obtains gaseous product and valuable metal solution.Gas purification is carried out to gaseous product And heat recovery, concrete steps include:Using fresh water (FW) or system return liquid gaseous product is carried out washing make gas discharge, obtain Washing liquid;Washing liquid is carried out heat exchange with mill solution to be heated in system, mill solution and cooling wash water after being heated.
Table 9:
Element Cu Fe Ni S
Leaching rate 99.3% 5% 99.7% 99%
The oxygen that the various embodiments described above are used and the heat of recovery detect, testing result is shown in Table 10.
Table 10:
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:By adopting The mode of pressure leaching is effectively leached to the valuable metal in copper cobalt nickel sulfide, is obtaining higher copper cobalt nickel leaching rate The impurity such as ferrum, aluminum are suppressed, in leached mud, to improve the purity of valuable metal in leachate to a certain extent, reduce simultaneously Subsequent handling removal of impurities cost.Then by leachate being carried out the processing mode of flash distillation, by the leachate containing valuable metal Gas and heat are separated with valuable metal, consequently facilitating reclaiming to gas and heat, reduce the energy and energy expenditure. The method has that valuable metal leaching rate is high, energy consumption is low, raw material wide accommodation, process and low excellent of cost of investment Point.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair Change, equivalent, improvement etc., should be included within the scope of the present invention.

Claims (10)

1. extract the method for valuable metal a kind of cobalt nickel sulfide from copper it is characterised in that methods described includes:
It is passed through oxygen in the ore pulp containing copper cobalt nickel sulfide and carries out pressure leaching, obtain leachate and leached mud;
Flash distillation is carried out to described leachate, obtains gaseous product and the product liquid containing each valuable metal.
2. method according to claim 1 it is characterised in that described pressure leaching extraction temperature be 160~220 DEG C, It is preferably 180~210 DEG C.
3. method according to claim 1 is it is characterised in that the leaching pressure of described pressure leaching is 1.2~3.0Mpa.
4. method according to claim 1 it is characterised in that in the step of described pressure leaching oxygen partial pressure be 0.3 ~1.0Mpa, preferably 0.5~1.0Mpa.
5. method according to claim 1 is it is characterised in that the extraction time of described pressure leaching is 1~3h.
6. method according to claim 1 is it is characterised in that the terminal acidity of described pressure leaching step is 10~60g/ L.
7. method according to any one of claim 1 to 6 is it is characterised in that after obtaining described gaseous product, described Method also includes:The step that gas purification and heat recovery are carried out to described gaseous product.
8. method according to claim 7 is it is characterised in that carry out gas purification and heat recovery to described gaseous product Step include:
So that described gas is discharged after described gaseous product is washed, obtain washing liquid;
Described washing liquid and mill solution to be heated are carried out heat exchange, mill solution and cooling wash water after being heated.
9. method according to claim 8 is it is characterised in that adopt fresh water (FW) or the anti-liquid pair of system in described washing step Described gaseous product is washed.
10. method according to claim 1 is it is characterised in that in described pressure leaching process step, also include to described The step that ore pulp containing copper cobalt nickel sulfide is stirred, the speed of described stirring is 30~100 turns/min.
CN201610849662.5A 2016-09-23 2016-09-23 Method for extracting valuable metal from copper, cobalt and nickel sulfide CN106399682A (en)

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