CN104745821B - Method for recovering nickel and copper metals in acid pickling sludge - Google Patents
Method for recovering nickel and copper metals in acid pickling sludge Download PDFInfo
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- CN104745821B CN104745821B CN201510074381.2A CN201510074381A CN104745821B CN 104745821 B CN104745821 B CN 104745821B CN 201510074381 A CN201510074381 A CN 201510074381A CN 104745821 B CN104745821 B CN 104745821B
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Abstract
The invention belongs to the technical field of acid pickling sludge recovery and specifically discloses a method for recovering nickel and copper metals in acid pickling sludge. The method comprises: crushing, filter pressing, primary impurity removal, secondary impurity removal, nickel sulfate crystallization and copper sulfate crystallization. The method for recovering the nickel and copper metals in the acid pickling sludge has the beneficial effects that the noble metals in the acid pickling sludge are recovered by use of the high-pressure acid pickling sludge, and compared with a traditional wet method, all usable metals such as nickel, copper sulfate, magnesium, calcium and zinc can be extracted from wastes, the probability of secondary pollution is decreased and the energy consumption is reduced.
Description
Technical field
The invention belongs to pickling mud recycle technical field reclaims nickel, copper gold and in particular to being based in pickling mud
The method belonging to.
Background technology
At present, pickling mud produce after go back the parallel processing method of neither one economic and technical, both at home and abroad frequently with
Method is solid landfill method, and in pickling mud contain substantial amounts of heavy metal, before landfill disposal is carried out to pickling mud it is necessary to
It is carried out solidify stabilized treatment, by cement, Colophonium, glass, waterglass etc., wherein, cement is the most normal to conventional firming agent
One of firming agent seen, cement solidification refers to mix waste with ordinary cement, forms the firming body with some strength, thus
Reduce the purpose of hazard component leaching rate in waste, although cement solidification method is widely used, there is occupation of land face in it
The shortcoming that long-pending big, solidification heavy metal of body long-time stability cannot be guaranteed, for this problem, abroad some scholar's research are sent out
Existing: to add suitable additive can improve solidification effect and reduce the dissolution rate of harmful substance, saving while cement solidification
Cement consumption, and increase quick solidifying intensity, such as asavapisits. etc., using alkaline systems such as cement, flyash mud, makes some
The stability of heavy metal hydroxide reaches optimal state, reduce because caused by the heavy dissolubility of pickling mud to binder
The collaborative negatively influencing of water reaction, however, the research of some scholars domestic shows: the application of flyash makes copper in solidified cement body
Bad stability, in ordinary cement add xanthates to process heavy metal sewage sludge, the leaching rate of heavy metal can be reduced.
The mass fraction that copper in China's pickling mud, nickel, chromium etc. are increased one's knowledge is higher, can be made by some enterprises as raw material
With in recent years, the research of domestic and international pickling sludge resource is concentrated mainly on heavy metal recovery technology and materialized technology, and this is two big
Aspect, the resource recovery technology for pickling mud adopts following methods: the acid-hatching of young eggs and ammonia leaching process, and the acid-hatching of young eggs refers to sulfur
The acid such as acid, hydrochloric acid is as digestion agent, the method that the target components of solubility are extracted from pickling mud, smelting process and roasting
Burn leaching method, smelting process mainly to reclaim copper, for the purpose of nickel, with coal, coke as fuel with reducing substances, iron ore, copper mine
The method that stone, limestone etc. are produced for adjuvant, roasting leaches method using the impurity in high-temperature roasting pretreating sludge, then uses
The media such as acid, water extract valuable metal in product of roasting, burn absorption method, refer on the basis of pickling sludge incineration melts,
The method that heavy metal in incineration slag is recycled, adopts this method and has the advantages that high treating effect, investment are little,
But, the temperature of burning leaches to metal and has an impact；Materialized technology, refers to produce by the use of pickling mud as raw material or adjuvant
Construction material or the process of other materials.
In sum, pickling Treatment of Sludge resource is always research emphasis both domestic and external, has carried out a lot of researchs simultaneously
Obtain certain achievement, but up to the present industrialization and few, solidification hole is buried most commonly seen, and it can not be fundamentally real
The minimizing of existing pickling mud, innoxious and resource, in the resource scheme having pointed out, only extraction, burning is reclaimed
Method and materialized technology are more feasible, and the extraction rate of extraction heavy metal is high, burning recovery can effectively be realized mud and subtract
Quantify and innoxious.
Therefore, based on the problems referred to above, the present invention provides the method based on reclaiming nickel, copper metal in pickling mud.
Content of the invention
Goal of the invention: it is an object of the invention to provide reclaiming nickel, the method for copper metal in a kind of mud based on pickling, its profit
With the high pressure acid-hatching of young eggs, the noble metal in pickling mud is reclaimed, compared with conventional wet, can extract in waste all can
With metal such as nickel, copper sulfate, manganese, calcium, zinc etc., reduce probability, the reducing energy consumption of secondary pollution.
Technical scheme: the present invention provides a kind of nickel, the method for copper metal of reclaiming in mud based on pickling, walks including following
Suddenly, step 1, pickling mud is utilized pulverizer pulverize, then carry out leaching process, add the ph value concentration to be in pulverizing raw material
The sulphuric acid of 1.5-2.5, with steam heating, heats while stirring, extraction time is 4-8 hour, and wherein, leached mud utilizes pressure filter
Filter pressing, filtrate enters subsequent processing step.
Step 2, remove ferrum filter pressing, first in ph value concentration for 2.5-4, and the oxidant hydrogen peroxide solution that temperature is 25 DEG C
Middle bivalence ferrum oxide is oxidized to ferric iron, add the sodium sulfate for 3.0-3.5 for the ph value by oxidant hydrogen peroxide solution
fe3+And na+Complex compound sediment separate, mother solution through pressure filter filter pressing enter subsequent processing step.
Step 3, a remove impurity, except the filtrate after ferrum carries out extraction process through filtering, after clarification, extract zn, cu,
Mn, ca impurity element, wherein, extractant adopts p204, and diluent is No. 260 solvent naphthas, enters first with sodium hydroxide solution
The homogeneous saponification of row, continuous saponification process, counter-current extraction in extraction box at room temperature.
Step 4, secondary remove impurity, it is p507 that the p204 extract of step 3 is adopted extractant, and diluent is No. 260 solvents
Oil carries out remove impurity, carries out homogeneously using sodium hydroxide solution, continuous saponification process in extraction box at room temperature, and organic faciess first use dilute sulfuric acid
Back extraction demagging, then carried out with dilute sulfuric acid nickel being enriched with prepared high-purity concentrated sulphuric acid nickel solution.
Step 5, crystalline nickel sulfate, nickel protoxide and high purity nickel are produced, and pump into very high-purity concentrated sulphuric acid nickel solution first
In empty rapid steamer, evaporating temperature≤50 DEG C, solution evaporation terminal proportion is 1.5-1.6, and after evaporation, nickel is not less than 220g/l, then puts
Enter crystallizer and carry out crystallisation by cooling, put into centrifuge when solution crystallization temperature is down to 28-30 DEG C and dry, gained crystallizes as sulphuric acid
Nickel；Add the heavy nickel of sodium carbonate in high-purity concentrated sulphuric acid nickel solution, rinse out sodium through filter pressing, heavy nickel waste water drains into sewage disposal
Stand, wash water returns and feeds intake, and obtains wet nickelous carbonate, carry out drying, roasting obtains nickel oxide particle, size-reduced machine pulverizes that oxidation is obtained is sub-
Nickel；High-purity concentrated sulphuric acid nickel solution carries out electrodeposition, in negative electrode gained high-purity nickel, anolyte return to step 4 remove impurity.
The technical program, recycle sulphuric acid segmentation back extraction that copper-bath, hydrochloric acid back extraction are obtained in described step 3
Copper-bath is finally pumped in vacuum evaporator by prepared mn, ca, zn metal, evaporating temperature≤50 DEG C, solution evaporation terminal
Proportion is 1.5-1.6, solution after evaporation is sent into crystallizer and carries out crystallisation by cooling, put into when solution temperature is down to 28-35 DEG C
Horizontal centrifuge carries out centrifuge dripping, obtains cupric sulfate crystals.
The technical program, in described step 1, pickling mud is utilized pulverizer to pulverize, then carry out leaching process, in powder
Add the sulphuric acid that ph value concentration is 1.8-2.4 in broken raw material, with steam heating, heat while stirring, extraction time is that 5-7 is little
When, wherein, leached mud utilizes pressure filter filter pressing, and filtrate enters subsequent processing step.
The technical program, remove ferrum filter pressing in described step 2, be 3.0-3.5 first in ph value concentration, and temperature is 25
DEG C oxidant hydrogen peroxide solution in bivalence ferrum oxide is oxidized to ferric iron, adding the sodium sulfate for 3.3 for the ph value will aoxidize
Fe in agent hydrogen peroxide solution3+And na+Complex compound sediment separate, mother solution through pressure filter filter pressing enter subsequent processing step.
Compared with prior art, nickel, the beneficial effect of the method for copper metal are reclaimed in a kind of mud based on pickling of the present invention
It is: it is reclaimed to the noble metal in pickling mud using the high pressure acid-hatching of young eggs, compared with conventional wet, can carry in waste
Take all available metals such as nickel, copper sulfate, manganese, calcium, zinc etc., reduce probability, the reducing energy consumption of secondary pollution.
Brief description
Fig. 1 be the present invention a kind of mud based on pickling in reclaim nickel, the handling process structural representation of the method for copper metal
Figure；
Fig. 2 be the present invention a kind of mud based on pickling in reclaim nickel, the method for copper metal copper sulfate handling process knot
Structure schematic diagram；
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment, it is further elucidated with the present invention.
Embodiment one
The present invention as shown in Figure 1 provides a kind of nickel, the method for copper metal of reclaiming in mud based on pickling, walks including following
Suddenly, step 1, pickling mud is utilized pulverizer pulverize, then carry out leaching process, add the ph value concentration to be in pulverizing raw material
The sulphuric acid of 1.5-2.5, with steam heating, heats while stirring, extraction time is 4-8 hour, and wherein, leached mud utilizes pressure filter
Filter pressing, filtrate enters subsequent processing step.
Step 2, remove ferrum filter pressing, first in ph value concentration for 2.5-4, and the oxidant hydrogen peroxide solution that temperature is 25 DEG C
Middle bivalence ferrum oxide is oxidized to ferric iron, add the sodium sulfate for 3.0-3.5 for the ph value by oxidant hydrogen peroxide solution
fe3+And na+Complex compound sediment separate, mother solution through pressure filter filter pressing enter subsequent processing step.
Step 3, a remove impurity, except the filtrate after ferrum carries out extraction process through filtering, after clarification, extract zn, cu,
The impurity elements such as mn, ca, wherein, extractant adopts p204, and diluent is No. 260 solvent naphthas, first with sodium hydroxide solution
Carry out homogeneous saponification, continuous saponification process, counter-current extraction in extraction box at room temperature.
Step 4, secondary remove impurity, it is p507 that the p204 extract of step 3 is adopted extractant, and diluent is No. 260 solvents
Oil carries out remove impurity, carries out homogeneously using sodium hydroxide solution, continuous saponification process in extraction box at room temperature, and organic faciess first use dilute sulfuric acid
Back extraction demagging, then carried out with dilute sulfuric acid nickel being enriched with prepared high-purity concentrated sulphuric acid nickel solution.
Step 5, crystalline nickel sulfate, nickel protoxide and high purity nickel are produced, and pump into very high-purity concentrated sulphuric acid nickel solution first
In empty rapid steamer, evaporating temperature≤50 DEG C, solution evaporation terminal proportion is 1.5-1.6, and after evaporation, nickel is not less than 220g/l, then puts
Enter crystallizer and carry out crystallisation by cooling, put into centrifuge when solution crystallization temperature is down to 28-30 DEG C and dry, gained crystallizes as sulphuric acid
Nickel；Add the heavy nickel of sodium carbonate in high-purity concentrated sulphuric acid nickel solution, rinse out sodium through filter pressing, heavy nickel waste water drains into sewage disposal
Stand, wash water returns and feeds intake, and obtains wet nickelous carbonate, carry out drying, roasting obtains nickel oxide particle, size-reduced machine pulverizes that oxidation is obtained is sub-
Nickel；High-purity concentrated sulphuric acid nickel solution carries out electrodeposition, in negative electrode gained high-purity nickel, anolyte return to step 4 remove impurity.
Embodiment two
The present invention provides in a kind of mud based on pickling and reclaims nickel, the method for copper metal, comprises the following steps, step 1, step
In rapid 1, pickling mud is utilized pulverizer to pulverize, then carry out leaching process, add ph value concentration to be 1.8- in pulverizing raw material
2.4 sulphuric acid, with steam heating, heats while stirring, and extraction time is 5-7 hour, and wherein, leached mud utilizes pressure filter pressure
Filter, filtrate enters subsequent processing step.
Step 2, remove ferrum filter pressing, first in ph value concentration for 3.0-3.5, and the oxidant hydrogen peroxide that temperature is 25 DEG C is molten
In liquid, bivalence ferrum oxide is oxidized to ferric iron, adds the sodium sulfate for 3.3 for the ph value by the fe in oxidant hydrogen peroxide solution3+
And na+Complex compound sediment separate, mother solution through pressure filter filter pressing enter subsequent processing step.
Step 3, a remove impurity, except the filtrate after ferrum carries out extraction process through filtering, after clarification, extract zn, cu,
The impurity elements such as mn, ca, wherein, extractant adopts p204, and diluent is No. 260 solvent naphthas, first with sodium hydroxide solution
Carry out homogeneous saponification, continuous saponification process, counter-current extraction in extraction box at room temperature.
Step 4, secondary remove impurity, it is p507 that the p204 extract of step 3 is adopted extractant, and diluent is No. 260 solvents
Oil carries out remove impurity, carries out homogeneously using sodium hydroxide solution, continuous saponification process in extraction box at room temperature, and organic faciess first use dilute sulfuric acid
Back extraction demagging, then carried out with dilute sulfuric acid nickel being enriched with prepared high-purity concentrated sulphuric acid nickel solution.
Step 5, crystalline nickel sulfate, nickel protoxide and high purity nickel are produced, and pump into very high-purity concentrated sulphuric acid nickel solution first
In empty rapid steamer, evaporating temperature≤50 DEG C, solution evaporation terminal proportion is 1.5-1.6, and after evaporation, nickel is not less than 220g/l, then puts
Enter crystallizer and carry out crystallisation by cooling, put into centrifuge when solution crystallization temperature is down to 28-30 DEG C and dry, gained crystallizes as sulphuric acid
Nickel；Add the heavy nickel of sodium carbonate in high-purity concentrated sulphuric acid nickel solution, rinse out sodium through filter pressing, heavy nickel waste water drains into sewage disposal
Stand, wash water returns and feeds intake, and obtains wet nickelous carbonate, carry out drying, roasting obtains nickel oxide particle, size-reduced machine pulverizes that oxidation is obtained is sub-
Nickel；High-purity concentrated sulphuric acid nickel solution carries out electrodeposition, in negative electrode gained high-purity nickel, anolyte return to step 4 remove impurity.
Wherein, recycle sulphuric acid segmentation back extraction that copper-bath, hydrochloric acid back extraction system are obtained in step 3 as shown in Figure 2
Obtain the metal such as mn, ca, zn, finally copper-bath is pumped in vacuum evaporator, evaporating temperature≤45 DEG C, solution evaporation terminal
Proportion is 1.55, solution after evaporation is sent into crystallizer and carries out crystallisation by cooling, put into horizontal when solution temperature is down to 29-34 DEG C
Centrifuge carries out centrifuge dripping, obtains cupric sulfate crystals.
The above is only the preferred embodiment of the present invention it is noted that ordinary skill people for the art
For member, under the premise without departing from the principles of the invention, some improvement can also be made, these improvement also should be regarded as the present invention's
Protection domain.
Claims (4)
1. based in pickling mud reclaim nickel, copper metal method it is characterised in that: comprise the following steps,
Step 1, pickling mud is utilized pulverizer pulverize, then carry out leaching process, add the ph value concentration to be in pulverizing raw material
The sulphuric acid of 1.5-2.5, with steam heating, heats while stirring, extraction time is 4-8 hour, and wherein, leached mud utilizes pressure filter
Filter pressing, filtrate enters subsequent processing step；
Step 2, remove ferrum filter pressing, be 2.5-4 first in ph value concentration, and general in the oxidant hydrogen peroxide solution that temperature is 25 DEG C
Bivalence ferrum oxide is oxidized to ferric iron, adds the sodium sulfate for 3.0-3.5 for the ph value by the fe in oxidant hydrogen peroxide solution3+With
na+Complex compound sediment separate, mother solution through pressure filter filter pressing enter subsequent processing step；
Step 3, a remove impurity, except the filtrate after ferrum carries out extraction process after filtering, clarifying, extract zn, cu, mn, ca
Impurity element, wherein, extractant adopts p204, and diluent is No. 260 solvent naphthas, carries out homogeneously first with sodium hydroxide solution
Saponification, continuous saponification process, counter-current extraction in extraction box at room temperature；
Step 4, secondary remove impurity, it is p507 that the p204 extract of step 3 is adopted extractant, and diluent enters for No. 260 solvent naphthas
Row remove impurity, carries out homogeneously using sodium hydroxide solution, continuous saponification process in extraction box at room temperature, and organic faciess first use dilute sulfuric acid back extraction
Demagging, then carried out with dilute sulfuric acid nickel being enriched with prepared high-purity concentrated sulphuric acid nickel solution；
Step 5, crystalline nickel sulfate, nickel protoxide and high purity nickel are produced, and first high-purity concentrated sulphuric acid nickel solution are pumped into vacuum and steam
In the machine of sending out, evaporating temperature≤50 DEG C, solution evaporation terminal proportion is 1.5-1.6, and after evaporation, nickel is not less than 220g/l, places into knot
Brilliant machine carries out crystallisation by cooling, puts into centrifuge and dries, gained crystallizes as nickel sulfate when solution crystallization temperature is down to 28-30 DEG C；
Add the heavy nickel of sodium carbonate in high-purity concentrated sulphuric acid nickel solution, rinse out sodium through filter pressing, heavy nickel waste water drains into Sewage Disposal, washes
Water returns and feeds intake, and obtains wet nickelous carbonate, carries out drying, roasting obtains nickel oxide particle, and size-reduced machine is pulverized and nickel protoxide is obtained；High-purity
Degree concentrated sulphuric acid nickel solution carries out electrodeposition, in negative electrode gained high-purity nickel, anolyte return to step 4 remove impurity.
2. in the mud based on pickling according to claim 1 reclaim nickel, copper metal method it is characterised in that: described step
Recycle sulphuric acid segmentation back extraction that copper-bath is obtained in rapid 3, hydrochloric acid back extraction is obtained mn, ca, zn metal, finally by sulphuric acid
Copper solution pumps in vacuum evaporator, evaporating temperature≤50 DEG C, and solution evaporation terminal proportion is 1.5-1.6, solution after evaporating
Send into crystallizer and carry out crystallisation by cooling, put into horizontal centrifuge when solution temperature is down to 28-35 DEG C and carry out centrifuge dripping, obtain
Cupric sulfate crystals.
3. in the mud based on pickling according to claim 1 reclaim nickel, copper metal method it is characterised in that: described step
In rapid 1, pickling mud is utilized pulverizer to pulverize, then carry out leaching process, add ph value concentration to be 1.8- in pulverizing raw material
2.4 sulphuric acid, with steam heating, heats while stirring, and extraction time is 5-7 hour, and wherein, leached mud utilizes pressure filter pressure
Filter, filtrate enters subsequent processing step.
4. in the mud based on pickling according to claim 1 reclaim nickel, copper metal method it is characterised in that: described step
Remove ferrum filter pressing in rapid 2, be 3.0-3.5 first in ph value concentration, and by two in the oxidant hydrogen peroxide solution that temperature is 25 DEG C
Valency ferrum oxide is oxidized to ferric iron, adds the sodium sulfate for 3.3 for the ph value by the fe in oxidant hydrogen peroxide solution3+And na+'s
Complex compound sediment separates, and mother solution enters subsequent processing step through pressure filter filter pressing.
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| CN201510074381.2A CN104745821B (en) | 2015-02-12 | 2015-02-12 | Method for recovering nickel and copper metals in acid pickling sludge |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105506291A (en) * | 2015-12-11 | 2016-04-20 | 苏州华周胶带有限公司 | Method for recycling heavy metals in electroplating sludge |
| CN105567978B (en) * | 2016-01-28 | 2018-08-31 | 浙江新时代中能循环科技有限公司 | The method that copper zinc cobalt nickel is recycled from the various waste materials containing non-ferrous metal |
| CN106315731A (en) * | 2016-09-13 | 2017-01-11 | 苏州湛清环保科技有限公司 | Method for producing nickel oxide from nickel-plating wastewater |
| CN108570555A (en) * | 2018-05-03 | 2018-09-25 | 北京矿冶科技集团有限公司 | A method of directly producing LITHIUM BATTERY nickel sulfate from nickel cobalt enriched substance |
| CN110605105A (en) * | 2019-08-23 | 2019-12-24 | 北京航天国环技术有限公司 | Method for regenerating metal from waste activated carbon |
| CN113735199B (en) * | 2021-08-25 | 2022-11-15 | 广东邦普循环科技有限公司 | Method for preparing nickel sulfate from nickel iron |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912133A (en) * | 2012-09-18 | 2013-02-06 | 上海交通大学 | Method for classifying and purifying heavy metals in electroplating sludge |
| CN103695655A (en) * | 2014-01-10 | 2014-04-02 | 王洪 | Method for recycling precious metals from stainless steel acid pickling sludge |
| CN104131166A (en) * | 2014-07-08 | 2014-11-05 | 泰州明锋资源再生科技有限公司 | Pollution-free treatment and recycling method of sludge generated during stainless steel acid washing process |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912133A (en) * | 2012-09-18 | 2013-02-06 | 上海交通大学 | Method for classifying and purifying heavy metals in electroplating sludge |
| CN103695655A (en) * | 2014-01-10 | 2014-04-02 | 王洪 | Method for recycling precious metals from stainless steel acid pickling sludge |
| CN104131166A (en) * | 2014-07-08 | 2014-11-05 | 泰州明锋资源再生科技有限公司 | Pollution-free treatment and recycling method of sludge generated during stainless steel acid washing process |
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