CN107790740A - A kind of application method of nickel slag - Google Patents
A kind of application method of nickel slag Download PDFInfo
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- CN107790740A CN107790740A CN201710888945.5A CN201710888945A CN107790740A CN 107790740 A CN107790740 A CN 107790740A CN 201710888945 A CN201710888945 A CN 201710888945A CN 107790740 A CN107790740 A CN 107790740A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/054—Nanosized particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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Abstract
The invention discloses a kind of application method of nickel slag, nickel slag, reducing agent, additive are mixed according to a certain percentage, ferronickel powder is obtained by reduction roasting, mill ore magnetic selection process；Ferronickel powder is obtained into pure nickel hydroxide precipitate by the step such as wet-leaching and hydrolysis removal of impurities afterwards；Then, its dissolving is made to form solution with addition of certain ethanol, watery hydrochloric acid and distilled water pure nickel hydroxide precipitate；Then solution is heated, while adds sodium hydroxide adjustment pH value；After to be adjusted, a certain amount of hydrazine hydrate will be wherein instilled, will then be incubated at a certain temperature, insulation separates drying after terminating, obtain nano nickel particles.By handling Industrial Solid Waste nickel slag the recovery of extraction respectively of iron and nickel can be achieved, and obtain the nano nickel particles of high added value in the present invention.
Description
Technical field
The invention belongs to field of metallurgy, and in particular to a kind of method that nano nickel particles are prepared using nickel slag solid waste as raw material.
Background technology
The research of transition metal nanoparticles (such as iron, cobalt, nickel) synthesis, is widely paid close attention to for nearly 20 years by people.Because
They have some special properties, and have widely in fields such as optics, electronics, catalyst, magnetic material and superconductions
Application prospect.
Nickel slag is as tailings caused by pyrometallurgical smelting metallic nickel, wherein containing about 40% iron and a small amount of nickel.Nickel at present
For residues processing technique based on storing up, fill, small part is used for building material industry, and this is not only polluted to soil, environment, is even more pair
The wasting of resources of valuable element.
The content of the invention
The technical problems to be solved by the invention are that Industrial Solid Waste nickel slag is handled, and iron, nickel is separately recovered, and are obtained high
Value-added product.
Therefore, the invention discloses a kind of application method of nickel slag, comprise the following steps：
S1, by nickel slag, reducing agent, additive mix, by reduction roasting, mill ore magnetic selection process obtain ferronickel powder；
S2, the ferronickel powder is carried out to wet-leaching and hydrolysis removal of impurities, obtain nickel hydroxide precipitate；
S3, by the nickel hydroxide precipitate with addition of absolute ethyl alcohol, watery hydrochloric acid and distilled water, its dissolving is formed solution；
S4, the solution heated, while add the pH value that sodium hydroxide adjusts the solution；
S5, instill hydrazine hydrate in the solution after adjusting pH and be incubated；
S6, insulation separate drying after terminating, obtain nano nickel particles.
Further, the nickel slag is solid waste caused by pyrometallurgical smelting metallic nickel, wherein nickel grade 0.5%~
6%.
Further, the reducing agent is carbonaceous material, such as anthracite, coke, biomass, semi-coke, coal tar etc..Institute
State 20%~37% that reducing agent dosage is the nickel slag amount.
Further, the additive types are calcium salt or sodium salt, and additive can be lime stone, dolomite, magnesite
Ore deposit, sodium carbonate, sodium sulphate etc..The additive amount is the 0.5%~1.5% of the nickel slag amount.
Because the iron in nickel slag and the embedding cloth of silicon are close, be difficult to separate, reduce that difficulty is big, the addition of additive can promote iron
With the separation of silicon, while promote growing up for reducing metal particle.If being added without additive or additive amount being very few, rank is reduced
Duan Wufa is fully dissociated iron and silicon, so as to influence reduction effect；If additive amount is excessive, reduction phase metallic particles
It is excessive, subsequent wet leaching effect can be influenceed.
Further, the reducing condition in step S1 is 1232~1276 DEG C, 17~28min of recovery time of reduction temperature,
Under the conditions of being somebody's turn to do, it is ensured that the reduction effect of nickel slag, while produce the suitable metallic particles of size.
Further, ferronickel powder Iron grade more than 90% in step S1, in ferronickel powder the size of metallic particles for 5~
30 μm, if nickel grade is too low, concentration is too low in the nickel leachate of acquisition.If metal particle size is too small, illustrate that metallic particles gathers
Collect insufficient, be unfavorable for being sorted in the mill ore magnetic selection stage, influence metal recovery effect；If metallic particles is excessive, follow-up wet
Leaching effect can be influenceed in method processing procedure.
Further, for wet method leaching process described in step S2 using sulfuric acid as leachate, the sulfuric acid concentration is 15
~50%.Because Fe, a small amount of Al can be dissolved into leachate together with Ni, if sulfuric acid concentration is too low, leaching efficiency is poor；With
Sulfuric acid concentration increase, sulfuric acid increase with the catalytic probability of nickel, and leaching ability strengthens, but the too high meeting of sulfuric acid content in system
Cause the quantity of alkali consumption of subsequent process excessive, or even passivation reaction occurs.
Further, described in step S2 in wet method leaching process, in mass the liquid-solid ratio of the wet-leaching be 2~
8,40~70 DEG C of extraction temperature, 100~150min of time.If liquid-solid ratio is too low, metallic nickel can not be fully dissolved into solution, leaching
It is insufficient to go out effect；If liquid-solid ratio is too high, it can be only that system brings more sulfuric acid into, increase the consumption of sulfuric acid and follow-up alkali lye；Together
When under said temperature time conditions, it is possible to achieve nickel ion fully leaches, and can realize its leaching rate 98.64% with
On.
Contain a large amount of nickel ions, also a small amount of impurity, then in leachate in the leachate obtained by wet-leaching
Add sodium hydroxide.Ion in solution can generate hydroxide with hydroxyl, completely heavy according to different types of hydroxide
PH value during shallow lake is different, reaches the purpose (referring to following table) of purifying nickel.
Further, dedoping step is hydrolyzed described in step S2 is：It is 7~8.5 that sodium hydroxide to system pH, which is added dropwise, instead
It is 20~40min between seasonable so that the material such as Fe, Al generation precipitation；After the contamination precipitation is filtered, continue to drip into filtrate
Hydrogenation sodium oxide molybdena to system pH reaches 9.3~10, and the reaction time is 8~12min, obtains pure nickel hydroxide precipitate.
Above-mentioned dropwise addition process is divided into two stages, and the contamination precipitation reaction time is 20~40min, and this is due to Fe, Al
Hydroxide precipitation be the larger colloidal of volume, easily adsorb a number of Ni2+, in order to avoid reaction speed mistake
It hurry up, cause entrainment of the impurity to nickel ion in precipitation process, so as to cause the loss of nickel, while the contamination precipitation obtained needs to use
Warm water washing 2~4 times, avoid precipitating attachment nickel ion.The precipitation reaction time of nickel hydroxide is 8~12min.If generation is heavy
The reaction speed in shallow lake is too fast, then can influence the sedimentation effect of nickel ion.
Pure nickel hydroxide after precipitation adds a certain amount of watery hydrochloric acid, absolute ethyl alcohol and distilled water, and it is molten to obtain nickel chloride
Liquid, its reclaimed water have been mainly solvent action, ensure that nickel is completely dissolved, and form solution.Carried out after solution is heated into certain temperature
Insulation, the pH value of sodium hydroxide solution regulation system is then added to certain limit, hydrazine hydrate is then added and is reacted.Its with
The reaction equation of hydrazine hydrate is:
2Ni2++N2H4+4OH-→2Ni+N2+4H2O
Further, absolute ethyl alcohol, watery hydrochloric acid addition according to the molal quantity rate-determining steps S3 of nickel hydroxide, make
The mol ratio of the absolute ethyl alcohol and the nickel hydroxide is (6~10):1, the mol ratio of the hydrochloric acid and the nickel hydroxide
For (2~2.5):1.
Nickel chloride dissolving can form complex ion solution in ethanol, because the coordination ability of ethanol molecule is not strong, institute's shape
Into complex and unstable, after hydrazine hydrate is added, the ethanol molecule in complex ion will be substituted, until reaction generation nickel
Nano particle.In addition, after nickel ion reduces generation metal, because nano particle diameter is small, surface energy is big, easily reunite
Phenomenon；Simultaneously because nickel is magnetic metal, mutual sucking action is easier to reunite.Due to the presence of ethanol, nano nickel
Surface easily adsorb hydroxyl, so as to prevent the reunion of nano particle.If the addition of absolute ethyl alcohol is very few, can not fully hinder
The only agglomeration of particle, i.e. ethanol are herein as reaction intermediary and dispersant.
Further, solution described in step S4 is heated to 35~60 DEG C of temperature, under this condition, reduction can be promoted anti-
The progress answered；The pH value of the solution is adjusted to 12~14, if pH value is too low, the hydroxyl concentration in system is too small, unfavorable
In the progress of reduction reaction.Meanwhile reducing power is weaker in acid condition for reducing agent hydrazine hydrate, and NaOH addition can increase
Its strong reducing power, is more beneficial for the progress of reduction reaction.
Further, the addition of the hydrazine hydrate according to the molal quantity rate-determining steps S5 of the nickel hydroxide, makes institute
The mol ratio for stating hydrazine hydrate and nickel ion is (0.8~1.2):1, the time of the insulation is 62~80min.It is anti-with hydrazine hydrate
During answering, nickel ion not only is reduced, while constantly produce inert gas N2.During the course of the reaction, caused gas
Stirring action can be formed in system, so as to promote reaction to carry out, while nano particle caused by prevention is reunited；In addition,
Inert gas can also play a part of isolated environment, avoid the metal nickel particle of reduction from aoxidizing.
The invention also discloses a kind of nano nickel particles prepared using the above method, the granularity of the nano nickel particles is
22~67nm.
The beneficial effects of the present invention are：
1st, by handling Industrial Solid Waste nickel slag, the recovery of extraction respectively of iron and nickel can be achieved；
2nd, by handling Industrial Solid Waste nickel slag, 22~67nm nano nickel particles are obtained.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, wherein：
Fig. 1 is the schematic flow sheet of the application method of nickel slag in the present invention.
Embodiment
Embodiments of the invention are described below in detail, the example of embodiment is shown in the drawings, wherein identical from beginning to end
Or similar label represents same or similar element or the element with same or like function.Retouched below with reference to accompanying drawing
The embodiment stated is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
According to the accompanying drawing 1 of the present invention, the application method of nickel slag, comprise the following steps：
S1, by nickel slag, reducing agent, additive mix, by reduction roasting, mill ore magnetic selection process obtain ferronickel powder；
S2, the ferronickel powder is carried out to wet-leaching and hydrolysis removal of impurities, obtain nickel hydroxide precipitate；
S3, by the nickel hydroxide precipitate with addition of absolute ethyl alcohol, watery hydrochloric acid and distilled water, its dissolving is formed solution；
S4, the solution heated, while add the pH value that sodium hydroxide adjusts the solution；
S5, instill hydrazine hydrate in the solution after adjusting pH and be incubated；
S6, insulation separate drying after terminating, obtain nano nickel particles.
Specifically, the nickel slag is solid waste caused by pyrometallurgical smelting metallic nickel, wherein nickel grade 0.5%~
6%.
Specifically, the reducing agent is carbonaceous material, such as anthracite, coke, biomass, semi-coke, coal tar etc..It is described
Reducing agent dosage is the 20%~37% of the nickel slag amount.
Specifically, the additive types are calcium salt or sodium salt, additive can be lime stone, dolomite, magnesite,
Sodium carbonate, sodium sulphate etc..The additive amount is the 0.5%~1.5% of the nickel slag amount.
Specifically, the reducing condition in step S1 is 1232~1276 DEG C of reduction temperature, 17~28min of recovery time.
Specifically, ferronickel powder Iron grade more than 90% in step S1, the size of metallic particles is 5~30 in ferronickel powder
μm。
Specifically, wet method leaching process described in step S2 is used as leachate using sulfuric acid, the sulfuric acid concentration for 15~
50%.
Specifically, described in step S2 in wet method leaching process, the liquid-solid ratio of the wet-leaching is 2~8 in mass,
40~70 DEG C of extraction temperature, 100~150min of time.
Specifically, dedoping step is hydrolyzed described in step S2 is：It is 7~8.5 that sodium hydroxide to system pH, which is added dropwise, reaction
Time is 20~40min so that the material such as Fe, Al generation precipitation；After the contamination precipitation is filtered, continue to be added dropwise into filtrate
Sodium hydroxide to system pH reaches 9.3~10, and the reaction time is 8~12min, obtains pure nickel hydroxide precipitate.
Above-mentioned dropwise addition process is divided into two stages, and the contamination precipitation reaction time is 20~40min, and this is due to Fe, Al
Hydroxide precipitation be the larger colloidal of volume, easily adsorb a number of Ni2+, in order to avoid reaction speed mistake
It hurry up, cause entrainment of the impurity to nickel ion in precipitation process, so as to cause the loss of nickel, while the contamination precipitation obtained needs to use
Warm water washing 2~4 times, avoid precipitating attachment nickel ion.The precipitation reaction time of nickel hydroxide is 8~12min.If generation is heavy
The reaction speed in shallow lake is too fast, then can influence the sedimentation effect of nickel ion.
Pure nickel hydroxide after precipitation adds a certain amount of watery hydrochloric acid, absolute ethyl alcohol and distilled water, and it is molten to obtain nickel chloride
Liquid, its reclaimed water have been mainly solvent action, ensure that nickel is completely dissolved, and form solution.Carried out after solution is heated into certain temperature
Insulation, the pH value of sodium hydroxide solution regulation system is then added to certain limit, hydrazine hydrate is then added and is reacted.Its with
The reaction equation of hydrazine hydrate is：
2Ni2++N2H4+4OH-→2Ni+N2+4H2O
Specifically, absolute ethyl alcohol, watery hydrochloric acid addition according to the molal quantity rate-determining steps S3 of nickel hydroxide, make institute
The mol ratio for stating absolute ethyl alcohol and the nickel hydroxide is (6~10):1, the mol ratio of the hydrochloric acid and the nickel hydroxide is
(2~2.5):1.
Nickel chloride dissolving can form complex ion solution in ethanol, because the coordination ability of ethanol molecule is not strong, institute's shape
Into complex and unstable, after hydrazine hydrate is added, the ethanol molecule in complex ion will be substituted, until reaction generation nickel
Nano particle.In addition, after nickel ion reduces generation metal, because nano particle diameter is small, surface energy is big, easily reunite
Phenomenon；Simultaneously because nickel is magnetic metal, mutual sucking action is easier to reunite.Due to the presence of ethanol, nano nickel
Surface easily adsorb hydroxyl, so as to prevent the reunion of nano particle.If the addition of absolute ethyl alcohol is very few, can not fully hinder
The only agglomeration of particle, i.e. ethanol are herein as reaction intermediary and dispersant.
Specifically, solution described in step S4 is heated to 35~60 DEG C of temperature, under this condition, can promote reduction reaction
Progress；The pH value of the solution is adjusted to 12~14, if pH value is too low, the hydroxyl concentration in system is too small, is unfavorable for
The progress of reduction reaction.Meanwhile reducing power is weaker in acid condition for reducing agent hydrazine hydrate, and NaOH addition can strengthen
Its reducing power, it is more beneficial for the progress of reduction reaction.
Specifically, the addition of the hydrazine hydrate according to the molal quantity rate-determining steps S5 of the nickel hydroxide, make described
The mol ratio of hydrazine hydrate and nickel ion is (0.8~1.2):1, the time of the insulation is 62~80min.With the reaction of hydrazine hydrate
During, not only reduced nickel ion, while constantly produce inert gas N2.During the course of the reaction, caused gas meeting
Stirring action is formed in system, so as to promote reaction to carry out, while nano particle caused by prevention is reunited；It is in addition, lazy
Property gas can also play a part of isolated environment, avoid reduction metal nickel particle aoxidize.
A kind of nano nickel particles prepared using the above method, the grain of the nano nickel particles are also disclosed in the present embodiment
Spend for 22~67nm.
Specific embodiment
Embodiment 1
Certain nickel slag, Iron grade 38.17%, nickel grade 0.54%.Reducing agent selects certain semi-coke, and its carbon content is 83%.Add
Adding agent, the two is according to weight 1 from sodium carbonate and the mixture of magnesite:3 ratio mixing.
First, by nickel slag, reducing agent, additive according to mass ratio 100:20:0.5 ratio mixing, is roasted at 1232 DEG C
Mill ore magnetic selection is carried out after burning 28min, it is final to obtain Iron grade 91.47%, the ferronickel powder of nickel grade 0.77%, its particle size
Between 8~18 μm.
Secondly, ferronickel powder is used to the sulfuric acid leaching of concentration 15%, liquid-solid ratio (mass ratio) is 8,40 DEG C of extraction temperature,
Time 150min, leaching rate 98.78%；Sodium hydroxide is added dropwise in the leachate obtained through wet-leaching, when the first stage reacts
Between 20min, system pH reaches 7, obtains the contamination precipitations such as Fe, Al, and by precipitation warm water washing 2 times, sediment can be used for carrying
Take ferro element；Second stage reaction time 12min, system pH reach 10, obtain nickel hydroxide precipitate.
Then, by pure nickel hydroxide precipitate with addition of certain ethanol, watery hydrochloric acid and distilled water, wherein ethanol and nickel
Mol ratio is 6:1, the mol ratio of hydrochloric acid and nickel is 2.5:1, its dissolving is formed solution；Solution is then heated to 35 DEG C, together
When add sodium hydroxide；System pH to be adjusted instills a certain amount of hydrazine hydrate thereto to after 12, makes rubbing for hydrazine hydrate and nickel
You are than being 0.8:1, solid-liquor separation is carried out after 50min is incubated and dries solid, obtains the nano nickel particles that granularity is 22nm.
Embodiment 2
Certain nickel slag, Iron grade 36.83%, nickel grade 0.62%.Reducing agent selects certain reduction coal, and its carbon content is 68%.
For additive from lime stone and the mixture of sodium sulphate, the two weight ratio is 2:1.
First, by nickel slag, reducing agent, additive according to mass ratio 100:29:1.0 ratio mixing, is roasted at 1254 DEG C
Mill ore magnetic selection is carried out after burning 23min, it is final to obtain Iron grade 90.08%, the ferronickel powder of nickel grade 0.82%, its particle size
Between 12~25 μm.
Secondly, ferronickel powder is used to the sulfuric acid leaching of concentration 33%, liquid-solid ratio (mass ratio) is 5,55 DEG C of extraction temperature,
Time 120min, leaching rate 98.86%；Sodium hydroxide is added dropwise in the leachate obtained through wet-leaching, when the first stage reacts
Between 30min, system pH reaches 7.8, obtains the contamination precipitations such as Fe, Al, and by precipitation warm water washing 3 times, sediment can be used for
Extract ferro element；Second stage reaction time 10min, system pH reach 9.6, obtain nickel hydroxide precipitate.
Then, by pure nickel hydroxide precipitate with addition of certain ethanol, watery hydrochloric acid and distilled water, wherein ethanol and nickel
Mol ratio is 8:1, the mol ratio of hydrochloric acid and nickel is 2.2:1, its dissolving is formed solution；Solution is then heated to 48 DEG C, together
When add sodium hydroxide；System pH to be adjusted instills a certain amount of hydrazine hydrate thereto to after 13, makes rubbing for hydrazine hydrate and nickel
You are than being 1:1, solid-liquor separation is carried out after 40min is incubated and dries solid, obtains the nano nickel particles that granularity is 45nm.
Embodiment 3
Certain nickel slag, Iron grade 37.13%, nickel grade 0.69%.Reducing agent selects certain biomass, and its carbon content is 40%,
Additive selects dolomite.
First, by nickel slag, reducing agent, additive according to mass ratio 100:37:1.5 ratio mixing, is roasted at 1276 DEG C
Mill ore magnetic selection is carried out after burning 17min, it is final to obtain Iron grade 90.08%, the ferronickel powder of nickel grade 0.95%, its particle size
Between 16~30 μm.
Secondly, ferronickel powder is used to the sulfuric acid leaching of concentration 50%, liquid-solid ratio (mass ratio) is 2,70 DEG C of extraction temperature,
Time 100min, leaching rate 98.81%；Sodium hydroxide is added dropwise in the leachate obtained through wet-leaching, when the first stage reacts
Between 40min, system pH reaches 8.5, obtains the contamination precipitations such as Fe, Al, and by precipitation warm water washing 3 times, sediment can be used for
Extract ferro element；Second stage reaction time 8min, system pH reach 9.3, obtain nickel hydroxide precipitate.
Then, by pure nickel hydroxide precipitate with addition of certain ethanol, watery hydrochloric acid and distilled water, wherein ethanol and nickel
Mol ratio is 10:1, the mol ratio of hydrochloric acid and nickel is 2:1, its dissolving is formed solution；Solution is then heated to 60 DEG C, simultaneously
Add sodium hydroxide；System pH to be adjusted instills a certain amount of hydrazine hydrate, makes mole of hydrazine hydrate and nickel thereto to after 13
Than for 1.2:1, solid-liquor separation is carried out after 45min is incubated and dries solid, obtains the nano nickel particles that granularity is 67nm.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is limited by claim and its equivalent.
Claims (10)
1. a kind of application method of nickel slag, it is characterised in that comprise the following steps：
S1, by nickel slag, reducing agent, additive mix, by reduction roasting, mill ore magnetic selection process obtain ferronickel powder；
S2, the ferronickel powder is carried out to wet-leaching and hydrolysis removal of impurities, obtain nickel hydroxide precipitate；
S3, by the nickel hydroxide precipitate with addition of absolute ethyl alcohol, watery hydrochloric acid and distilled water, its dissolving is formed solution；
S4, the solution heated, while add the pH value that sodium hydroxide adjusts the solution；
S5, instill hydrazine hydrate in the solution after adjusting pH and be incubated；
S6, insulation separate drying after terminating, obtain nano nickel particles.
2. the method as described in claim 1, it is characterised in that the nickel slag is solid waste caused by pyrometallurgical smelting metallic nickel
Thing, wherein nickel grade are 0.5%~6%.
3. the method as described in claim 1, it is characterised in that the reducing condition in step S1 is reduction temperature 1232~1276
DEG C, 17~28min of recovery time.
4. the method as described in claim 1, it is characterised in that ferronickel powder Iron grade more than 90%, ferronickel powder in step S1
The size of metallic particles is 5~30 μm in end.
5. the method as described in claim 1, it is characterised in that wet method leaching process described in step S2 is using sulfuric acid as leaching
Go out liquid, the sulfuric acid concentration is 15~50%.
6. the method as described in claim 1, it is characterised in that dedoping step is hydrolyzed described in step S2 is：Hydroxide is added dropwise
Sodium to system pH is 7~8.5, and the reaction time is 20~40min, generates contamination precipitation；After the contamination precipitation is filtered, to
Continue dropwise addition sodium hydroxide to system pH in filtrate and reach 9.3~10, the reaction time is 8~12min, obtains nickel hydroxide and sinks
Form sediment.
7. the method as described in claim 1, it is characterised in that absolute ethyl alcohol described in step S3 rubs with the nickel hydroxide
Your ratio is (6~10):1, the mol ratio of the hydrochloric acid and the nickel hydroxide is (2~2.5):1.
8. the method as described in claim 1, it is characterised in that solution described in step S4 is heated to 35~60 DEG C of temperature, institute
The pH value for stating solution is adjusted to 12~14.
9. the method as described in claim 1, it is characterised in that according to institute in the molal quantity rate-determining steps S5 of the nickel hydroxide
The addition of hydrazine hydrate is stated, the mol ratio for making the hydrazine hydrate and nickel ion is (0.8~1.2):1, the time of the insulation is
62~80min.
10. the method as described in claim 1, it is characterised in that the granularity of the nano nickel particles is 22~67nm.
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| CN201710888945.5A CN107790740A (en) | 2017-09-27 | 2017-09-27 | A kind of application method of nickel slag |
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| CN201710888945.5A CN107790740A (en) | 2017-09-27 | 2017-09-27 | A kind of application method of nickel slag |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113549767A (en) * | 2021-07-22 | 2021-10-26 | 安徽焓谷工程技术有限公司 | Extraction method of smelting slag of activated secondary lead |
| CN114941075A (en) * | 2022-05-30 | 2022-08-26 | 金川镍钴研究设计院有限责任公司 | Method for removing impurities from nickel slag |
| WO2023005406A1 (en) * | 2021-07-29 | 2023-02-02 | 广东邦普循环科技有限公司 | Method for directly preparing nickel sulfate from low nickel matte, nickel sulfate and application thereof |
-
2017
- 2017-09-27 CN CN201710888945.5A patent/CN107790740A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113549767A (en) * | 2021-07-22 | 2021-10-26 | 安徽焓谷工程技术有限公司 | Extraction method of smelting slag of activated secondary lead |
| WO2023005406A1 (en) * | 2021-07-29 | 2023-02-02 | 广东邦普循环科技有限公司 | Method for directly preparing nickel sulfate from low nickel matte, nickel sulfate and application thereof |
| CN114941075A (en) * | 2022-05-30 | 2022-08-26 | 金川镍钴研究设计院有限责任公司 | Method for removing impurities from nickel slag |
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