CN103184472A - Method for preparing high-purity zinc by electrolysis - Google Patents
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Abstract
The invention provides a method for preparing high-purity zinc by electrolysis. The method comprises the following steps: leaching a zinc-containing material using an ammonium chloride solution to obtain a zinc-ammonia complex solution; performing impurity removal on the zinc-ammonia complex solution through constant-voltage electrolysis to remove most of impurity ions which are more electropositive than zinc from the solution; after impurity removal through constant-voltage electrolysis, allowing the zinc-ammonia complex solution to flow through a zinc particle vibration purifier to replace the residual impurity metal ions in the solution and thus to achieve the effect of deep purification of the solution; adding carbon-ammonium into the zinc-ammonia complex solution after deep purification to perform ammonia treatment and remove a part of calcium and magnesium ions from the solution; and performing electrolysis on the ammonia-treated solution to obtain high-purity metal zinc. Compared with the prior art of zinc preparation through electrolysis of a zinc-ammonia complex compound, the method provided by the invention adopts carbon-ammonium to replace liquid ammonia, so as to reduce the consumption cost of ammonia and avoid the enrichment of calcium and magnesium in the solution; and performs deep purification by impurity removal through constant-voltage electrolysis and treatment of the solution with the zinc particle vibration purifier after electrolysis impurity removal, so as to completely eliminate the use of zinc powder in the purification link, greatly reduce the purification cost and produce the purified solution which is higher in quality than purification with zinc powder. Therefore, the method stably produces No.0 metal zinc.
Description
Technical field
The present invention relates to the hydrometallurgy field, relate in particular to a kind of method of electrolytic preparation high-purity Zn.
Background technology
Zinc secondary resource and the zinc oxide ore of iron content height, fluorine-containing chlorine height or the high magnesium of high calcium, its resource is very abundant, but because it contains high ferro, high fluorine chlorine or high calcium, high magnesium, can not produce electric zinc with conventional acid system art breading, cause a large amount of zinc resources not obtain due application.Domestic many research institutions and enterprise have done a large amount of research and development work in succession in this respect, the different methods of using complex compound electrolysis zinc processed is disclosed as Chinese patent CN1034231C, CN101289706A and CN1125883C, preferably resolve the disadvantageous effect of elements such as iron and chlorine to producing, but still have many deficiencies:
1, above-mentioned patent all will add use liquefied ammonia or ammoniacal liquor replenishing as leaching agent or electrolysis consumption ammonia.1), liquefied ammonia is industrial goods as use liquefied ammonia that two unfavorable factors are arranged:, the price height makes production cost higher; 2), liquefied ammonia is volatile dangerous product, in transportation and use, extremely danger will be used withstand voltage container and pipeline, complicated operation is dangerous.1), ammoniacal liquor is low levels liquefied ammonia liquid use ammoniacal liquor that two unfavorable factors are also arranged:, transportation is inconvenient, and trucking costs is higher; 2), add ammoniacal liquor, in the process of preparation zinc, certainly will bring a large amount of water into, cause system bulk to expand.
2, the above-mentioned patented method enrichment of calcium-magnesium removing of all considering how to disappear, and calcium ions and magnesium ions concentration can hinder the galvanic deposit of zine ion as being higher than 20g/L in the electrolytic solution, forms crystallization simultaneously easily and blocks pipeline valve.
3, above-mentioned patented method all relies on the zinc powder purification and impurity removal, causes the zinc powder consumption excessive, and cost is too high, and the removal effect of lead, cadmium and copper is not ideal enough simultaneously, influences product quality, all can't produce the high purity zinc ingot metal.
4, CN101289706A, CN1125883C whole process adopt ammonium-ammonia-aqueous systems, and whole flow process ammonia volatilization is serious, and the ammonia flavor is excessive, the environmental aspect very severe.
Summary of the invention
The method that the purpose of this invention is to provide a kind of electrolytic preparation high-purity Zn can low cost prepare the 0# metallic zinc.
In order to solve the problems of the technologies described above, the method for electrolytic preparation high-purity Zn provided by the invention is achieved in that
A kind of method of electrolytic preparation high-purity Zn is characterized in that, comprising: use ammonium chloride solution leaching material containing zinc, obtain zinc ammonia complex solution;
Described zinc ammonia complex solution by the constant-potential electrolysis removal of impurities, is removed the major part than the more electropositive foreign ion of zinc in solution;
Described zinc ammonia complex solution stream after the constant-potential electrolysis removal of impurities is vibrated cleaner through zinc granule, and remaining foreign metal ion is displaced in the solution, realizes the deep purifying of solution;
Add the carbon ammonium in the zinc ammonia complex solution behind described deep purifying, join ammonia and remove part calcium ions and magnesium ions in the solution;
The described ammonia solution of joining is carried out electrolysis, obtain high purity metal zinc.
Optionally, in the described use ammonium chloride solution leaching material containing zinc, the concentration of described ammonium chloride solution is 5～7mol/l, the liquid-solid ratio of described ammonium chloride solution and described material containing zinc is 5～10: 1, the temperature of described leaching is 75～80 ℃, the time of described leaching is 90～120min, and the thing of the zinc in the described material containing zinc is zinc oxide, zinc hydroxide, zinc carbonate and metallic zinc etc. mutually.
Optionally, the voltage of described constant-potential electrolysis removal of impurities is 1.5～2.2V, electrolysis temperature 70-75 degree, and electrolysis time is for being reduced to 30-130A/m when cathode current density
2
Optionally, the cathode-anode plate of described constant-potential electrolysis removal of impurities is graphite cake, the electrolyzer volume: the negative plate total area is 0.7～1.5L/dm
2, heteropole is apart from being 45～55mm, monolithic positive plate area is 0.4～0.8 times of monolithic negative plate area.
Optionally, the solution temperature in the described zinc granule vibration cleaner is 75-95 ℃, and amplitude is 2-4mm, and solution residence time in the vibration cleaner is 2-5 minute, and the zinc granule dynamics is 2-10mm, and the zinc granule volume is the 60-80% of reactor volume.
Optionally, described when joining ammonia the addition of carbon ammonium be 15～50g/L, solution temperature is 65～85 ℃, joining the ammonia time is 20～40min.
Optionally, the electrolyte temperature during described electrolysis is 65～75 ℃, and pH value is 5.5～7.2, and the electrolysis waste solution zinc concentration is 10～15g/L, and current density is 350～700A/m
2, bath voltage is 2.5～3.0V.
The present invention uses agricultural carbon ammonium to replace industrial liquefied ammonia or ammoniacal liquor, and cost reduces, and stores and convenient transportation safety simple to operate.And use agricultural carbon ammonium to replace industrial liquefied ammonia or ammoniacal liquor, in compensation electrolysis consumption ammonia, the part calcium ions and magnesium ions forms CaCO
3, MgCO
3Precipitation has been avoided the enrichment of calcium ions and magnesium ions in solution.By the Combination application that constant-potential electrolysis removal of impurities and zinc granule vibration purify, thoroughly avoided the zinc powder purification process, save the treating plant investment, purified required zinc consumption, reached human cost; And the solution after the constant-potential electrolysis removal of impurities, general cadmium content want several times or number to decuple the content of other impurity, and feasible higher by cadmium content in the purification slag behind the zinc granule vibration purification utensil, recovery value is higher.
Description of drawings
Fig. 1 is the method flow diagram of electrolytic preparation high-purity Zn provided by the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
As shown in Figure 1, the method flow of electrolytic preparation high-purity Zn provided by the invention comprises:
Leach:
Specifically: use ammonium chloride solution leaching material containing zinc, obtain containing zinc ammonia complex solution;
Material containing zinc is: the useless by product of high fluorine, chlorine, iron, calcium, magnesia zinc mineral or industry that contains zinc oxide, zinc hydroxide, zinc carbonate and metallic zinc etc.; Zinc and other heavy metal all form ammonia complex and enter solution.The leaching chemical equation is:
Mn/2+nNH
4Cl → M (NH
3)
nCl
n+ n/2H
2O (M=Zn
2+, Cd
2+, Cu
2+, Cu
+, Pb
2+Fe
2+, As
2+, Sb
2+On metal)
This step obtains leaching liquid and leaching slag, and leaching liquid is for containing zinc ammonia complex.
The electrolysis removal of impurities:
Specifically: will contain zinc ammonia complex solution and carry out the constant-potential electrolysis removal of impurities, and remove the major part that contains foreign metal ion more electropositive than zinc in the zinc ammonia complex solution;
The constant-potential electrolysis removal of impurities, voltage range 1.5～2.2V, heteropole pole span are 45～55 millimeters, and temperature is 70～75 ℃, and electrolysis time is for being reduced to 30～130A/m when cathode current density
2, positive plate is graphite cake, negative plate is graphite cake.Impurity such as As, Sb, Co, Ni, Cu, Pb, Cd all form sponge attitude metal simple-substance at negative electrode; Part ferrous ion in the solution is oxidized to ferric ion and forms the ferric hydroxide colloid precipitation rapidly at anode.
Liquid is after the removal of impurities: contain zinc ammonia complex solution, the removal of impurities slag is the part metals ion of removing.
Vibration purifies:
Specifically: will vibrate cleaner through zinc granule through the zinc ammonia complex solution stream that contains of constant-potential electrolysis, foreign metal ion remaining in the zinc ammonia complex solution after the electrolysis removal of impurities is removed by displacement;
Solution after the electrolysis removal of impurities continuously flows in the vibrator and stopped 2～5 minutes, solution temperature is the 75-95 degree in the vibrator, and the zinc granule granularity is 2-10mm, and the zinc granule volume is the 60-80% of vibrator volume, amplitude is 2-4mm, purifies back liquid and realizes that by fine filter continuous slag liquid separates.Institute's removal of impurity mainly is lead, copper, cadmium.
The zinc casting type slag that the cathode zinc that the zinc granule that uses in this step adopts method provided by the invention to produce produces when the casting zinc ingot metal forms through Mechanical Crushing.
Join the ammonia calcium-magnesium removing:
Adding the carbon ammonium through zinc granule vibration cleaner in the zinc ammonia complex after finishing deep purifying, join ammonia and remove part calcium ions and magnesium ions in the solution;
Carbon ammonium dosage adds by 15～50g/l, and temperature is 65～85 ℃, and the time is 20～40min.
The reaction mechanism of zinc ammino zoarium when electrolysis is:
1) the electrochemical cathode reaction is: Zn (NH
3) 2Cl
2+ 2e
-→ Zn+2NH
3+ 2Cl
-
2) the anode electrochemical reaction is: 2Cl
-→ Cl
2+ 2e
-
For avoiding Cl
2Generation, need to make the electrochemical reaction of anode follow hard on following chemical reaction by in electrolytic solution, adding ammonia:
Cl
2+2/3NH
3→2HCl+1/2N
2
Thereby the total reaction of anode is:
2Cl
-+2/3NH
3→2HCl+1/3N
2+2e
-
3) the electrolysis net reaction is:
Zn(NH
3)
2Cl
2+2/3NH
3→Zn+1/3N
2+2NH
4Cl
From above-mentioned reaction mechanism as seen, when electrolysis, make electrolytic reaction continue not produce chlorine, will constantly replenish ammonia.The present invention replenishes ammonia with the form of carbon ammonium, and part calcium ions and magnesium ions and carbonate form CaCO in the solution
3, MgCO
3Flocculent deposit, all the other bicarbonate of ammonia are in the solution of 70-80 degree, and decomposes is emitted carbon dioxide and ammonia, and ammonia is dissolved in the solution, have reached the purpose of mending ammonia, have avoided the enrichment of calcium magnesium in the solution simultaneously.Chemical equation is:
NH
4HCO
3+ heat → NH
3+ H
2O+CO
2 ↑
NH
4HCO
3+M
2+→MCO
3+NH
3+2H
+
Electrolysis:
Specifically: carry out electrolysis to joining ammonia solution, obtain high-purity Zn.
Electrolyte temperature is 65～75 ℃, and pH value is 5.5～7.2, and the electrolysis waste solution zinc concentration is 10～15g/L, and current density is 350～700A/m
2, bath voltage is 2.5～3.0V.
Electrolysis waste solution can reclaim as leaching liquid, produces zinc ammonia complex solution, realizes recycling of ammonium chloride solution.The zinc metal sheet founding that electrolysis obtains, founding slag are reclaimed as the zinc granule in the vibration purification and are continued to use, and the electrolysis zinc ingot metal is preserved.
Use the method for electrolytic preparation high-purity Zn provided by the present invention, can stablize output 0# metallic zinc.
The present invention and existing zinc ammonia complex electrolysis zinc technology processed relatively utilizes the carbon ammonium to replace liquefied ammonia, has reduced ammonia consumption cost and has avoided the enrichment of calcium magnesium in solution; By using the constant-potential electrolysis removal of impurities and using zinc granule vibration cleaner to carry out deep purifying to the solution after the electrolysis removal of impurities, completely abolished the use of zinc powder in the purge segment, greatly reduced the purification cost, and obtain purifying higher-quality scavenging solution than the use zinc powder, thereby stably produce the 0# metallic zinc.
In order to illustrate further the method for electrolytic preparation high-purity Zn provided by the invention, followingly provide detailed embodiment:
Embodiment one
1, leach a kind of material containing zinc with ammonium chloride solution, concrete content is Zn 31.3%, Pb 3.89%, Cd 1.75%, and Cu 0.07%, Cl 6%, Fe9%, As1.25%, Sb 0.34%; 80 ℃ of temperature, time 90min obtains zinc ammonia complex solution, after testing: Zn 68.54g/L, Pb 3.92g/L, Cu 0.06g/L, Cd1.58g/L, Cl 5.6M/L, Fe 0.0046g/L, As 0.003g/L, Sb 0.005g/L;
2, get above-mentioned 10 cubic metres zinc ammonia complex solution and carry out the preliminary removal of impurities of electrolysis, electrolytic condition is: anode is graphite cake, total area 50m
2, negative electrode also is graphite cake, the total area is 100m
2, the heteropole pole span is 40 millimeters; Constant voltage 2.1V electrolysis, temperature 75 degree, electrolysis time after 120 minutes cathode current density drop to 130A/m
2, the electrolysis removal of impurities finishes, actual measurement power consumption 124 degree, and the solution after the electrolysis filters and detects chemical examination, and each constituent content is respectively: Zn67.51g/L, Pb0.009g/L, Cu0.001g/L, Cd 0.56g/L, Fe0.002g/L, As0.0003g/L and Sb 0.0003g/L.
3, solution after the above-mentioned filtration is carried out zinc granule vibration deep purifying, vibration cleaner volume is 0.05 cube, in adorn 300 kilograms of zinc granules, the zinc granule volume is about 78% of cleaner volume, solution residence time in the vibration cleaner is 3 minutes, amplitude 3mm, temperature is 80 degree, filters back solution result of laboratory test to be: Zn 68.23g/L, Pb 0.0001g/L, Cu 0.00002g/L, Cd 0.0001g/L, Fe 0.0017g/L.Cross the heavy 10.34Kg of filter residue, moisture 21.9%, Pb0.76%, Cd53.15%, Cu0.09%, Zn20.95%.Contain the zinc meter that enters in the solution, total zinc granule consumption is about 0.95g/L, needs 20m by electrolytic zinc per ton
3Solution calculates, and amounts to purify zinc consumption 18kg/TZn.
4, with the filtrate behind the above-mentioned deep impurity-removing, per 10 cubic metres add 300～500 kilograms of carbon ammoniums, and temperature 72 degree after 25 minutes reaction times, precipitate calcium carbonate and magnesiumcarbonate and solution separating by press filtration.
5, above-mentioned solution is evenly squeezed into electrolyzer, control electrolysis tail washings contains Zn10g/L, and current density 400A/ square metre, total current 17.4KA, 35 millimeters of heteropole distances, bath voltage 2.85V, electrolysis went out zinc metal sheet in 27 hours, the heavy 561Kg of actual measurement zinc metal sheet, current efficiency is 97.9%.
6, solution turns back to the first step leaching material containing zinc after the electrolysis, recycles.
7, survey zinc metal sheet: Pb 0.0003%, Cu＜0.0001%, Cd 0.0002%, and Al 0.0003%, Sn0.0001%, Fe 0.0003% impurity summation 0.0013%, Zn 99.9987%.
8, by method of the present invention, industrialization was produced 3 months continuously, facts have proved that tooling cost and raw materials cost are low, and product purity is high and stable, and flow process is simple, operational safety.
9, this experimental example one is to use the carbon ammonium, with compare with liquefied ammonia or ammoniacal liquor before, reduce expenses: 1. the ton zinc consumption ammonia cost with liquefied ammonia or ammoniacal liquor is: liquefied ammonia or ammoniacal liquor present price are 3400 yuan/ton, and the consumption of ton zinc is 175 kilograms, and then expense is: 3400 * 0.175=595 unit.2. this example one is to use the carbon ammonium, and its ton zinc consuming cost is: the existing valency of agricultural carbon ammonium is 650 yuan/ton, and it is 833 kilograms that ton zinc consumes the carbon ammonium, and then expense is 650 * 0.833=541 unit.3. ton zinc is reduced expenses: 595-541=54 unit/ton zinc, and as 100,000 tons of zinc meters per year, then a year saving expense is 5,400,000 yuan, it is considerable to reduce expenses.
10, this experimental example one uses electrolysis removal of impurities and zinc granule vibration to purify and obtained the new liquid of high-quality electrolysis, and the electricity charge of its electrolysis removal of impurities are: 124KwH * 0.75 yuan/KwH=93 unit, the zinc granule consumption costs is: 0.95Kg/m
3* 10m
3* 17 yuan/Kg=161.5 unit, the gross decontamination cost is 254.5 yuan, amounts to a ton zinc cost and is about 500 yuan.As use the zinc powder multistage to purify, and adding up to zinc powder to throw in concentration minimum is 3g/L-6g/L, the zinc consumption expense is: 3-6Kg/m
3* 10m
3* 17 yuan/Kg=510～1020 yuan, amount to a ton zinc cost and be about 1000-2000 unit.Present method purifies 500～1500 yuan of/ton zinc of cost savings expense, as 100,000 tons of zinc meters per year, 5,000 ten thousand to 1.5 hundred million yuan of year saving expenses, as taking into account than minimum cheap 2000 yuan/ton factor of zinc powder price with the zinc granule price of zinc casting type slag manufacturing, the expense of saving is considerable especially.
Embodiment two
1, leaches a kind of material containing zinc Zn 36.64%, Pb 0.83%, Cu2.2%, Cd4.19% with ammonium chloride solution; Temperature 80 degree, obtain containing zinc ammonia complex solution, after testing: Zn68.7g/L, Pb 1.06g/L, Cu 2.66g/L, Cd 4.31g/L, Cl 5.6M/L, Fe 0.003g/L, As 0.0003g/L, Sb 0.0005g/L at 90 minutes time;
2, get the above-mentioned 10 cubic metres zinc ammonia complex solution that contains and carry out the preliminary removal of impurities of electrolysis, electrolytic condition is: anode is graphite cake, total area 50m
2, negative electrode also is graphite cake, the total area is 100m
2, the heteropole pole span is 40 millimeters; Constant voltage 2.2V electrolysis, temperature 75 degree, electrolysis time after 180 minutes cathode current density drop to 75A/m
2, electrolysis finishes, actual measurement power consumption 254 degree, and the solution after the electrolysis filters and detects chemical examination, and each constituent content is respectively: Zn67.23g/L, Pb0.003g/L, Cu0.002g/L, Cd 0.032g/L, Fe0.002g/L, As 0.0003g/L, Sb 0.0003g/L.
3, solution after the above-mentioned filtration is carried out zinc granule vibration deep purifying, vibration cleaner volume is 0.05 cube, in adorn 300 kilograms of zinc granules, the zinc granule volume is about 78% of cleaner volume, solution residence time in the vibration cleaner is 4 minutes, amplitude 3mm, temperature is 85 degree, filtering back solution result of laboratory test (g/L) is Zn 67.91, Pb 0.00004, Cu 0.00001, and Cd 0.00007, and Fe 0.002.Cross the heavy 0.81Kg of filter residue, moisture 22.3%, Pb4.1%, Cd43.4.3%, Cu2.5%, Zn20.3%.Contain the total zinc granule consumption of the zinc that enters solution and be about 0.7g/L, need 20m by electrolytic zinc per ton
3Solution calculates, and amounts to purify zinc consumption 1.4kg/TZn.
4, with the filtrate behind the above-mentioned deep impurity-removing, per 10 cubic metres add 300～500 kilograms of carbon ammoniums, and temperature 75 degree after 25 minutes reaction times, precipitate calcium carbonate and magnesiumcarbonate and solution separating by press filtration.
5, above-mentioned solution is evenly squeezed into electrolyzer, it is 15g/L that control electrolysis tail washings contains Zn, current density 500A/ square metre, total current 21.7KA, 35 millimeters of heteropole distances, bath voltage 3.0V, electrolysis went out zinc metal sheet in 20.5 hours, the heavy 517Kg of actual measurement zinc metal sheet, and current efficiency is 95.3%.
6, solution turns back to the first step leaching zinc material after the electrolysis, recycles.
7, survey the zinc metal sheet of preparation: Pb 0.0002%, Cu＜0.0001%, and Cd 0.0002%, and Al 0.0003%, Sn＜0.0001%, Fe 0.0003% impurity summation＜0.0012%, Zn＞99.9988%.
8, by method of the present invention, industrialization was produced 3 months continuously, facts have proved, production cost and original cost are low, and product purity is high and stable, and flow process is simple, operational safety.
9, this experimental example two is to use the carbon ammonium, with compare with liquefied ammonia or ammoniacal liquor before, reduce expenses: 1. the ton zinc consumption ammonia cost with liquefied ammonia or ammoniacal liquor is: liquefied ammonia or ammoniacal liquor present price are 3400 yuan/ton, and the consumption of ton zinc is 175 kilograms, and then expense is: 3400 * 0.175=595 unit.2. this example two is to use the carbon ammonium, and its ton zinc consuming cost is: the existing valency of agricultural carbon ammonium is 650 yuan/ton, and it is 833 kilograms that ton zinc consumes the carbon ammonium, and then expense is 650 * 0.833=541 unit.3. ton zinc is reduced expenses: 595-541=54 unit/ton zinc, and as by 100,000 tons of zinc, then a year saving expense is 5,400,000 yuan, it is considerable to reduce expenses.
10. this experimental example two uses electrolysis removal of impurities and zinc granule vibration to purify and obtained the new liquid of high-quality electrolysis, and the electricity charge of its electrolysis removal of impurities are: 254KwH * 0.75 yuan/KwH=190.5 unit, the zinc granule consumption costs is: 0.7Kg/m
3* 10m
3* 17 yuan/Kg=119 unit, the gross decontamination cost is 309.5 yuan, amounts to a ton zinc cost and is about 620 yuan.As use the zinc powder multistage to purify, and adding up to zinc powder to throw in concentration minimum is 3g/L～6g/L, the zinc consumption expense is: 3～6Kg/m
3* 10m
3* 17 yuan/Kg=510～1020 yuan, amount to a ton zinc cost and be about 1000～2000 yuan.Present method purifies 380～1380 yuan of/ton zinc of cost savings expense, as 100,000 tons of zinc meters per year, 3,800 ten thousand to 1.38 hundred million yuan of year saving expenses, as taking into account than minimum cheap 2000 yuan/ton factor of zinc powder price with the zinc granule price of zinc casting type slag manufacturing, the expense of saving is considerable especially.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. the method for an electrolytic preparation high-purity Zn is characterized in that, comprising: use ammonium chloride solution leaching material containing zinc, obtain zinc ammonia complex solution;
Described zinc ammonia complex solution by the constant-potential electrolysis removal of impurities, is removed the major part than the more electropositive foreign ion of zinc in solution;
Described zinc ammonia complex solution stream after the constant-potential electrolysis removal of impurities is vibrated cleaner through zinc granule, and remaining foreign metal ion is displaced in the solution, realizes the deep purifying of solution;
Add the carbon ammonium in the zinc ammonia complex solution behind described deep purifying, join ammonia and remove part calcium ions and magnesium ions in the solution;
The described ammonia solution of joining is carried out electrolysis, obtain high purity metal zinc.
2. the method for electrolytic preparation high-purity Zn according to claim 1, it is characterized in that, in the described use ammonium chloride solution leaching material containing zinc, the concentration of described ammonium chloride solution is 5～7mol/l, the liquid-solid ratio of described ammonium chloride solution and described material containing zinc is 5～10: 1, the temperature of described leaching is 75～80 ℃, and the time of described leaching is 90～120min, and the thing of the zinc in the described material containing zinc is zinc oxide, zinc hydroxide, zinc carbonate and metallic zinc etc. mutually.
3. the method for electrolytic preparation high-purity Zn according to claim 1 is characterized in that, the voltage of described constant-potential electrolysis removal of impurities is 1.5～2.2V, electrolysis temperature 70-75 degree, and electrolysis time is for being reduced to 30-130A/m when cathode current density
2
4. the method for electrolytic preparation high-purity Zn according to claim 3 is characterized in that, the cathode-anode plate of described constant-potential electrolysis removal of impurities is graphite cake, the electrolyzer volume: the negative plate total area is 0.7～1.5L/dm
2, heteropole is apart from being 45～55mm, monolithic positive plate area is 0.4～0.8 times of monolithic negative plate area.
5. the method for electrolytic preparation high-purity Zn according to claim 1, it is characterized in that, solution temperature in the described zinc granule vibration cleaner is 75-95 ℃, amplitude is 2-4mm, solution residence time in the vibration cleaner is 2-5 minute, the zinc granule dynamics is 2-10mm, and the zinc granule volume is the 60-80% of reactor volume.
6. the method for electrolytic preparation high-purity Zn according to claim 1 is characterized in that, described when joining ammonia the addition of carbon ammonium be 15～50g/L, solution temperature is 65～85 ℃, joining the ammonia time is 20～40min.
7. the method for electrolytic preparation high-purity Zn according to claim 1 is characterized in that, electrolyte temperature is 65～75 ℃ during electrolysis, and pH value is 5.5～7.2, and the electrolysis waste solution zinc concentration is 10～15g/L, and current density is 350～700A/m
2, bath voltage is 2.5～3.0V.
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| CN105586496A (en) * | 2016-03-29 | 2016-05-18 | 河南国玺超纯金属材料有限公司 | Process for industrial production of high-purity zinc |
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| US4292147A (en) * | 1979-06-22 | 1981-09-29 | National Research Development Corporation | Zinc chloride electrolysis |
| CN101054686A (en) * | 2007-02-14 | 2007-10-17 | 浙江工业大学 | Process for purifying zinc from casting zinc residue |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105586496A (en) * | 2016-03-29 | 2016-05-18 | 河南国玺超纯金属材料有限公司 | Process for industrial production of high-purity zinc |
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