CN106319565A - Method for preparing zinc electrodeposit under ammoniac system - Google Patents

Method for preparing zinc electrodeposit under ammoniac system Download PDF

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CN106319565A
CN106319565A CN201610839562.4A CN201610839562A CN106319565A CN 106319565 A CN106319565 A CN 106319565A CN 201610839562 A CN201610839562 A CN 201610839562A CN 106319565 A CN106319565 A CN 106319565A
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zinc
ammonia
lead
under
powder
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王文庆
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Dongguan Lianzhou Intellectual Property Operation and Management Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
    • C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/03—Making non-ferrous alloys by melting using master alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C11/00—Alloys based on lead
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C25C7/02—Electrodes; Connections thereof
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

The invention discloses a method for preparing zinc electrodeposit under an ammoniac system. The method comprises steps as follows: ground zinc oxide ore powder is added to pure ammonia water, the mixture is contained in a closed container at the normal temperature and under the normal pressure for leaching of zinc, a leached zinc ammonia complex aqueous solution is reduced with zinc powder, impurities in the leached solution are removed, and a purified zinc ammonia complex solution is obtained; the zinc ammonia complex solution is heated and then subjected to flashing for ammonia removal, zinc-containing slurry is obtained, flashing gas is recovered, and ammonia water is obtained; concentrated sulfuric acid is added to the zinc-containing slurry, and the zinc-containing slurry is changed into a zinc sulfate solution; the zinc sulfate solution is added to an electrolytic bath, a mixture of gelatin, tetramethyl ammonium chloride, benzyl trimethyl ammonium chloride and benzyl triethyl ammonium chloride is added as an additive, an aluminium alloy plate is used as a cathode, a lead alloy plate is used as an anode, electrodeposition is performed, and zinc electrodeposit is obtained. The zinc electrodeposit obtained with the method is high in quality, the efficiency is good, and the energy consumption is low.

Description

A kind of method preparing electrowinning zinc under ammonia gonosome system
Technical field:
The present invention relates to electrification field of metallurgy, the method being specifically related to prepare electrowinning zinc under a kind of ammonia gonosome system.
Background technology:
Along with zinc abstraction industrial expansion, zinc sulfide ore resource is the most exhausted, low-grade zinc oxide ore resource and zinc two The development and utilization of secondary resource is increasingly subject to people's attention.At present, ammonia process processes zinc oxide ore technique, has purification process Simply, leachate can be recycled, the advantages such as environmental pollution is little, be widely used in preparing in electrowinning zinc, but electrowinning zinc Process is difficult to control to, and is especially not added with effective additive, the surface porosity multiple cracks of negative electrode electrowinning zinc, and border is dendrite Shape, easily comes off from negative electrode, it is difficult to peel off into plate, is unfavorable for commercial production.On the other hand, the positive plate machinery that electrowinning zinc uses Performance and decay resistance are not very good, cause its service life short, considerably increase the production cost of electrowinning zinc, and electrowinning zinc During tank voltage and energy consumption higher, greatly limit the application of the method.
Summary of the invention:
It is an object of the invention to provide the method preparing electrowinning zinc under a kind of ammonia gonosome system, the electrowinning zinc matter that the method prepares Amount height, energy consumption is low, and the positive plate used has mechanical performance and the corrosion resistance of excellence, can significantly improve anode and use the longevity Life, is substantially reduced electro-deposition cost.
For achieving the above object, the present invention is by the following technical solutions:
The method preparing electrowinning zinc under a kind of ammonia gonosome system, comprises the following steps:
(1) the zinc oxide ore powder after grinding adds pure ammonia, loads and leach zinc in hermetic container under normal temperature and pressure, leaching Go out zinc ammonia complex aqueous solution impurity in zinc powder reduction, removing leachate, the zinc ammonia complexing liquid after being purified；
(2) flash evaporation deamination after the zinc ammonia complexing liquid preparing step (1) heats, obtains containing zinc serosity, and to flash distillation Gas carries out reclaiming to obtain ammonia；
(3) to step (2) gained containing in zinc serosity add concentrated sulphuric acid carry out acid decomposition so that it is be converted into zinc sulfate molten Liquid；
(4) add the solution of zinc sulfate of step (3) gained in a cell, and add gelatin, tetramethyl ammonium chloride, benzyl Trimethyl ammonium chloride, benzyltriethylammoinium chloride mixing as additive, using aluminium alloy plate as negative electrode, make with lead alloy plate For anode, electrodeposition, obtain electrowinning zinc；
Wherein, when described metal is as positive plate, its composition by weight percentage, including following components: silver 0.2- 1.1wt%, calcium 0-0.15wt%, strontium and aluminum 0-0.05wt%, remaining is lead；When described aluminium alloy is as minus plate, its composition By weight percentage, including following components: chromium 1-2wt%, nickel 1.5-3wt%, remaining is aluminum；Described gelatin, tetramethyl chlorine Change ammonium, benzyltrimethylammonium chloride, benzyltriethylammoinium chloride addition are respectively as follows: 0.075g, 3mg, 2.85mg, 1.09mg.
Preferred as technique scheme, in step (3), in described solution of zinc sulfate, zinc concentration is 80- 270g/L。
Preferred as technique scheme, in step (2), the condition of described flash distillation is: flash temperature: 90-180 DEG C, Flashing pressure: 0.005-0.15MPa.
Preferred as technique scheme, the preparation method of described lead alloy plate, specifically include following steps:
A) in smelting furnace by lead 370-410 DEG C of fusing, add argentum powder, start stirring, be warming up to 600 DEG C, be incubated 20- 30min, is subsequently adding aluminium powder, starts stirring, is cooled to 540-550 DEG C, adds lead calcium foundry alloy and lead strontium foundry alloy, stirring 10-20min, is cooled to 500-510 DEG C, stands 5-10min, obtains aluminium alloy；
B) aluminium alloy obtained by step a) injects in water-cooled irony mould, treats the aluminium alloy top layer in water-cooled irony mould Demoulding during solidification, obtains half solidification state metal ingot completely；
C) the half solidification state metal ingot using double-roll rolling mill to obtain step b) carries out pressing under multi-pass, and overall reduction >= 70%, obtain alloy lead anode plate.
Preferred as technique scheme, in step a), purity >=99.9% of described lead, the purity of argentum powder >= 99.8%, purity >=99.5% of calcium, purity >=99.5% of aluminium powder, purity >=99.5% of strontium.
Preferred as technique scheme, in step b), the top layer of described half solidification state metal ingot solidifies completely, in Heart part is microstructure of semisolid, and central area, top layer temperature is 150-230 DEG C.
Preferred as technique scheme, in step (4), the condition of described electrodeposition is: temperature: 20-40 DEG C, electric current is close Degree: 380-410A/m2, electrodeposition time: 3-5h, heteropole is away from 3cm.
The method have the advantages that
The present invention adds gelatin, tetramethyl ammonium chloride, benzyltrimethylammonium chloride, benzyl triethyl ammonium chlorination in the electrolytic solution Ammonium is as compound additive, and the consumption of each component of conservative control, can effectively control formation speed and the speed of growth of nucleus Balance, the deposition layer obtained is fine and close, smooth, smooth；
On the other hand, the present invention during preparing alloy lead anode plate, the consumption of each component in conservative control alloy, And in the rolling starting stage, use semi-solid metal ingot, its top layer solidifies the most completely, and core is microstructure of semisolid, And reasonable adjusting rolling mill practice so that the crystal orientation randomization on prepared alloy lead anode plate surface also adds special grain boundary Quantity, it is thus achieved that equally distributed spherical non-dendritic structure, the present invention prepares positive plate when being used for preparing electrowinning zinc, can be notable Reduce the corrosion rate of positive plate, significantly extend the service life of positive plate thus reduce the preparation cost of electrowinning zinc.
Detailed description of the invention:
In order to be better understood from the present invention, below by embodiment, the present invention is further described, and embodiment is served only for solving Release the present invention, the present invention will not be constituted any restriction.
Embodiment 1
The method preparing electrowinning zinc under a kind of ammonia gonosome system, comprises the following steps:
(1) preparation of alloy lead anode plate:
A) in smelting furnace by lead 370 DEG C of fusings, add argentum powder, start stirring, be warming up to 600 DEG C, be incubated 20- 30min, is subsequently adding aluminium powder, starts stirring, is cooled to 540 DEG C, adds lead calcium foundry alloy and lead strontium foundry alloy, stirs 10- 20min, is cooled to 500 DEG C, stands 5min, obtains aluminium alloy；
B) aluminium alloy obtained by step a) injects in water-cooled irony mould, treats the aluminium alloy top layer in water-cooled irony mould Demoulding during solidification, obtains half solidification state metal ingot completely, and its top layer solidifies completely, and core is microstructure of semisolid, top layer Central area temperature is 150-230 DEG C；
C) the half solidification state metal ingot using double-roll rolling mill to obtain step b) carries out pressing under multi-pass, and overall reduction >= 70%, obtain alloy lead anode plate；
(2) the zinc oxide ore powder after grinding adds pure ammonia, loads and leach zinc in hermetic container under normal temperature and pressure, leaching Go out zinc ammonia complex aqueous solution impurity in zinc powder reduction, removing leachate, the zinc ammonia complexing liquid after being purified；
(3) flash evaporation deamination after the zinc ammonia complexing liquid preparing step (2) heats, obtains containing zinc serosity, and to flash distillation Gas carries out reclaiming to obtain ammonia, and wherein, flash conditions is: flash temperature: 90 DEG C, flashing pressure: 0.005MPa；
(4) to step (3) gained containing in zinc serosity add concentrated sulphuric acid carry out acid decomposition so that it is be converted into zinc sulfate molten Liquid；
(5) add the solution of zinc sulfate of step (4) gained in a cell, and add gelatin, tetramethyl ammonium chloride, benzyl Trimethyl ammonium chloride, benzyltriethylammoinium chloride mixing as additive, using aluminium alloy plate as negative electrode, make with lead alloy plate For anode, temperature: 20 DEG C, electric current density: 380A/m2, electrodeposition time: 3h, heteropole, away from electrodeposition under conditions of 3cm, obtains electrodeposition Zinc；
Wherein, when described metal is as positive plate, its composition by weight percentage, including following components: silver 0.2wt%, calcium 0.1wt%, strontium and aluminum 0.01wt%, remaining is lead；When described aluminium alloy is as minus plate, its composition is with weight Percentages, including following components: chromium 1wt%, nickel 1.5wt%, remaining is aluminum；Described gelatin, tetramethyl ammonium chloride, benzyl three Ammonio methacrylate, benzyltriethylammoinium chloride addition are respectively as follows: 0.075g, 3mg, 2.85mg, 1.09mg.
Embodiment 2
The method preparing electrowinning zinc under a kind of ammonia gonosome system, comprises the following steps:
(1) preparation of alloy lead anode plate:
A) in smelting furnace by lead 410 DEG C of fusings, add argentum powder, start stirring, be warming up to 600 DEG C, be incubated 20- 30min, is subsequently adding aluminium powder, starts stirring, is cooled to 550 DEG C, adds lead calcium foundry alloy and lead strontium foundry alloy, stirs 10- 20min, is cooled to 510 DEG C, stands 10min, obtains aluminium alloy；
B) aluminium alloy obtained by step a) injects in water-cooled irony mould, treats the aluminium alloy top layer in water-cooled irony mould Demoulding during solidification, obtains half solidification state metal ingot completely, and its top layer solidifies completely, and core is microstructure of semisolid, top layer Central area temperature is 150-230 DEG C；
C) the half solidification state metal ingot using double-roll rolling mill to obtain step b) carries out pressing under multi-pass, and overall reduction >= 70%, obtain alloy lead anode plate；
(2) the zinc oxide ore powder after grinding adds pure ammonia, loads and leach zinc in hermetic container under normal temperature and pressure, leaching Go out zinc ammonia complex aqueous solution impurity in zinc powder reduction, removing leachate, the zinc ammonia complexing liquid after being purified；
(3) flash evaporation deamination after the zinc ammonia complexing liquid preparing step (2) heats, obtains containing zinc serosity, and to flash distillation Gas carries out reclaiming to obtain ammonia, and wherein, flash conditions is: flash temperature: 180 DEG C, flashing pressure: 0.15MPa；
(4) to step (3) gained containing in zinc serosity add concentrated sulphuric acid carry out acid decomposition so that it is be converted into zinc sulfate molten Liquid；
(5) add the solution of zinc sulfate of step (4) gained in a cell, and add gelatin, tetramethyl ammonium chloride, benzyl Trimethyl ammonium chloride, benzyltriethylammoinium chloride mixing as additive, using aluminium alloy plate as negative electrode, make with lead alloy plate For anode, temperature: 40 DEG C, electric current density: 410A/m2, electrodeposition time: 5h, heteropole, away from electrodeposition under conditions of 3cm, obtains electrodeposition Zinc；
Wherein, when described metal is as positive plate, its composition by weight percentage, including following components: silver 1.1wt%, calcium 0.15wt%, strontium and aluminum 0.05wt%, remaining is lead；When described aluminium alloy is as minus plate, its composition is with weight Amount percentages, including following components: chromium 2wt%, nickel 3wt%, remaining is aluminum；Described gelatin, tetramethyl ammonium chloride, benzyl three Ammonio methacrylate, benzyltriethylammoinium chloride addition are respectively as follows: 0.075g, 3mg, 2.85mg, 1.09mg.
Embodiment 3
The method preparing electrowinning zinc under a kind of ammonia gonosome system, comprises the following steps:
(1) preparation of alloy lead anode plate:
A) in smelting furnace by lead 380 DEG C of fusings, add argentum powder, start stirring, be warming up to 600 DEG C, be incubated 20- 30min, is subsequently adding aluminium powder, starts stirring, is cooled to 542 DEG C, adds lead calcium foundry alloy and lead strontium foundry alloy, stirs 10- 20min, is cooled to 505 DEG C, stands 6min, obtains aluminium alloy；
B) aluminium alloy obtained by step a) injects in water-cooled irony mould, treats the aluminium alloy top layer in water-cooled irony mould Demoulding during solidification, obtains half solidification state metal ingot completely, and its top layer solidifies completely, and core is microstructure of semisolid, top layer Central area temperature is 150-230 DEG C；
C) the half solidification state metal ingot using double-roll rolling mill to obtain step b) carries out pressing under multi-pass, and overall reduction >= 70%, obtain alloy lead anode plate；
(2) the zinc oxide ore powder after grinding adds pure ammonia, loads and leach zinc in hermetic container under normal temperature and pressure, leaching Go out zinc ammonia complex aqueous solution impurity in zinc powder reduction, removing leachate, the zinc ammonia complexing liquid after being purified；
(3) flash evaporation deamination after the zinc ammonia complexing liquid preparing step (2) heats, obtains containing zinc serosity, and to flash distillation Gas carries out reclaiming to obtain ammonia, and wherein, flash conditions is: flash temperature: 110 DEG C, flashing pressure: 0.01MPa；
(4) to step (3) gained containing in zinc serosity add concentrated sulphuric acid carry out acid decomposition so that it is be converted into zinc sulfate molten Liquid；
(5) add the solution of zinc sulfate of step (4) gained in a cell, and add gelatin, tetramethyl ammonium chloride, benzyl Trimethyl ammonium chloride, benzyltriethylammoinium chloride mixing as additive, using aluminium alloy plate as negative electrode, make with lead alloy plate For anode, temperature: 25 DEG C, electric current density: 390A/m2, electrodeposition time: 3.5h, heteropole, away from electrodeposition under conditions of 3cm, obtains electrodeposition Zinc；
Wherein, when described metal is as positive plate, its composition by weight percentage, including following components: silver 0.4wt%, calcium 0.05wt%, strontium and aluminum 0.02wt%, remaining is lead；When described aluminium alloy is as minus plate, its composition is with weight Amount percentages, including following components: chromium 1.2wt%, nickel 1.8wt%, remaining is aluminum；Described gelatin, tetramethyl ammonium chloride, benzyl Base trimethyl ammonium chloride, benzyltriethylammoinium chloride addition are respectively as follows: 0.075g, 3mg, 2.85mg, 1.09mg.
Embodiment 4
The method preparing electrowinning zinc under a kind of ammonia gonosome system, comprises the following steps:
(1) preparation of alloy lead anode plate:
A) in smelting furnace by lead 390 DEG C of fusings, add argentum powder, start stirring, be warming up to 600 DEG C, be incubated 20- 30min, is subsequently adding aluminium powder, starts stirring, is cooled to 544 DEG C, adds lead calcium foundry alloy and lead strontium foundry alloy, stirs 10- 20min, is cooled to 510 DEG C, stands 7min, obtains aluminium alloy；
B) aluminium alloy obtained by step a) injects in water-cooled irony mould, treats the aluminium alloy top layer in water-cooled irony mould Demoulding during solidification, obtains half solidification state metal ingot completely, and its top layer solidifies completely, and core is microstructure of semisolid, top layer Central area temperature is 150-230 DEG C；
C) the half solidification state metal ingot using double-roll rolling mill to obtain step b) carries out pressing under multi-pass, and overall reduction >= 70%, obtain alloy lead anode plate；
(2) the zinc oxide ore powder after grinding adds pure ammonia, loads and leach zinc in hermetic container under normal temperature and pressure, leaching Go out zinc ammonia complex aqueous solution impurity in zinc powder reduction, removing leachate, the zinc ammonia complexing liquid after being purified；
(3) flash evaporation deamination after the zinc ammonia complexing liquid preparing step (2) heats, obtains containing zinc serosity, and to flash distillation Gas carries out reclaiming to obtain ammonia, and wherein, flash conditions is: flash temperature: 130 DEG C, flashing pressure: 0.08MPa；
(4) to step (3) gained containing in zinc serosity add concentrated sulphuric acid carry out acid decomposition so that it is be converted into zinc sulfate molten Liquid；
(5) add the solution of zinc sulfate of step (4) gained in a cell, and add gelatin, tetramethyl ammonium chloride, benzyl Trimethyl ammonium chloride, benzyltriethylammoinium chloride mixing as additive, using aluminium alloy plate as negative electrode, make with lead alloy plate For anode, temperature: 30 DEG C, electric current density: 100A/m2, electrodeposition time: 4h, heteropole, away from electrodeposition under conditions of 3cm, obtains electrodeposition Zinc；
Wherein, when described metal is as positive plate, its composition by weight percentage, including following components: silver 0.6wt%, calcium 0.07wt%, strontium and aluminum 0.03wt%, remaining is lead；When described aluminium alloy is as minus plate, its composition is with weight Amount percentages, including following components: chromium 1.4wt%, nickel 2.3wt%, remaining is aluminum；Described gelatin, tetramethyl ammonium chloride, benzyl Base trimethyl ammonium chloride, benzyltriethylammoinium chloride addition are respectively as follows: 0.075g, 3mg, 2.85mg, 1.09mg.
Embodiment 5
The method preparing electrowinning zinc under a kind of ammonia gonosome system, comprises the following steps:
(1) preparation of alloy lead anode plate:
A) in smelting furnace by lead 400 DEG C of fusings, add argentum powder, start stirring, be warming up to 600 DEG C, be incubated 20- 30min, is subsequently adding aluminium powder, starts stirring, is cooled to 550 DEG C, adds lead calcium foundry alloy and lead strontium foundry alloy, stirs 10- 20min, is cooled to 500 DEG C, stands 8min, obtains aluminium alloy；
B) aluminium alloy obtained by step a) injects in water-cooled irony mould, treats the aluminium alloy top layer in water-cooled irony mould Demoulding during solidification, obtains half solidification state metal ingot completely, and its top layer solidifies completely, and core is microstructure of semisolid, top layer Central area temperature is 150-230 DEG C；
C) the half solidification state metal ingot using double-roll rolling mill to obtain step b) carries out pressing under multi-pass, and overall reduction >= 70%, obtain alloy lead anode plate；
(2) the zinc oxide ore powder after grinding adds pure ammonia, loads and leach zinc in hermetic container under normal temperature and pressure, leaching Go out zinc ammonia complex aqueous solution impurity in zinc powder reduction, removing leachate, the zinc ammonia complexing liquid after being purified；
(3) flash evaporation deamination after the zinc ammonia complexing liquid preparing step (2) heats, obtains containing zinc serosity, and to flash distillation Gas carries out reclaiming to obtain ammonia, and wherein, flash conditions is: flash temperature: 160 DEG C, flashing pressure: 0.12MPa；
(4) to step (3) gained containing in zinc serosity add concentrated sulphuric acid carry out acid decomposition so that it is be converted into zinc sulfate molten Liquid；
(5) add the solution of zinc sulfate of step (4) gained in a cell, and add gelatin, tetramethyl ammonium chloride, benzyl Trimethyl ammonium chloride, benzyltriethylammoinium chloride mixing as additive, using aluminium alloy plate as negative electrode, make with lead alloy plate For anode, temperature: 35 DEG C, electric current density: 400A/m2, electrodeposition time: 4.5h, heteropole, away from electrodeposition under conditions of 3cm, obtains electrodeposition Zinc；
Wherein, when described metal is as positive plate, its composition by weight percentage, including following components: silver 0.8wt%, calcium 0.11wt%, strontium and aluminum 0.04wt%, remaining is lead；When described aluminium alloy is as minus plate, its composition is with weight Amount percentages, including following components: chromium 1.6wt%, nickel 2.6wt%, remaining is aluminum；Described gelatin, tetramethyl ammonium chloride, benzyl Base trimethyl ammonium chloride, benzyltriethylammoinium chloride addition are respectively as follows: 0.075g, 3mg, 2.85mg, 1.09mg.

Claims (7)

1. the method preparing electrowinning zinc under an ammonia gonosome system, it is characterised in that comprise the following steps:
(1) the zinc oxide ore powder after grinding adds pure ammonia, loads and leach zinc, Leaching Zinc in hermetic container under normal temperature and pressure Ammino-complex aqueous solution, through zinc powder reduction, removes the impurity in leachate, the zinc ammonia complexing liquid after being purified；
(2) flash evaporation deamination after the zinc ammonia complexing liquid preparing step (1) heats, obtains containing zinc serosity, and enters flashed vapour Row reclaims to obtain ammonia；
(3) to step (2) gained containing in zinc serosity add concentrated sulphuric acid carry out acid decomposition so that it is be converted into solution of zinc sulfate；
(4) add the solution of zinc sulfate of step (3) gained in a cell, and add gelatin, tetramethyl ammonium chloride, benzyl front three Ammonium chloride, benzyltriethylammoinium chloride mixing as additive, using aluminium alloy plate as negative electrode, using lead alloy plate as sun Pole, electrodeposition, obtain electrowinning zinc；
Wherein, when described metal is as positive plate, its composition by weight percentage, including following components: silver 0.2- 1.1wt%, calcium 0-0.15wt%, strontium and aluminum 0-0.05wt%, remaining is lead；When described aluminium alloy is as minus plate, its composition By weight percentage, including following components: chromium 1-2wt%, nickel 1.5-3wt%, remaining is aluminum；Described gelatin, tetramethyl chlorine Change ammonium, benzyltrimethylammonium chloride, benzyltriethylammoinium chloride addition are respectively as follows: 0.075g, 3mg, 2.85mg, 1.09mg.
The method preparing electrowinning zinc under a kind of ammonia the most as claimed in claim 1 gonosome system, it is characterised in that: in step (3), institute In the solution of zinc sulfate stated, zinc concentration is 80-270g/L.
The method preparing electrowinning zinc under a kind of ammonia the most as claimed in claim 1 gonosome system, it is characterised in that: in step (2), institute The condition stating flash distillation is: flash temperature: 90-180 DEG C, flashing pressure: 0.005-0.15MPa.
The method preparing electrowinning zinc under a kind of ammonia the most as claimed in claim 1 gonosome system, it is characterised in that described lead alloy plate Preparation method, specifically include following steps:
A) in smelting furnace by lead 370-410 DEG C of fusing, add argentum powder, start stirring, be warming up to 600 DEG C, be incubated 20- 30min, is subsequently adding aluminium powder, starts stirring, is cooled to 540-550 DEG C, adds lead calcium foundry alloy and lead strontium foundry alloy, stirring 10-20min, is cooled to 500-510 DEG C, stands 5-10min, obtains aluminium alloy；
B) aluminium alloy obtained by step a) injects in water-cooled irony mould, treats that the aluminium alloy top layer in water-cooled irony mould is complete Demoulding during solidification, obtains half solidification state metal ingot；
C) the half solidification state metal ingot using double-roll rolling mill to obtain step b) carries out pressing under multi-pass, and overall reduction >= 70%, obtain lead alloy plate.
The method preparing electrowinning zinc under a kind of ammonia the most as claimed in claim 4 gonosome system, it is characterised in that: in step a), institute State purity >=99.9% of lead, purity >=99.8% of argentum powder, purity >=99.5% of calcium, purity >=99.5% of aluminium powder, strontium Purity >=99.5%.
The method preparing electrowinning zinc under a kind of ammonia the most as claimed in claim 4 gonosome system, it is characterised in that: in step b), institute The top layer stating half solidification state metal ingot solidifies completely, and core is microstructure of semisolid, and central area, top layer temperature is 150- 230℃。
The method preparing electrowinning zinc under a kind of ammonia the most as claimed in claim 1 gonosome system, it is characterised in that: in step (4), institute The condition stating electrodeposition is: temperature: 20-40 DEG C, electric current density: 380-410A/m2, electrodeposition time: 3-5h, heteropole is away from 3cm.
CN201610839562.4A 2016-09-21 2016-09-21 Method for preparing zinc electrodeposit under ammoniac system Withdrawn CN106319565A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108360018A (en) * 2018-03-20 2018-08-03 中南大学 Electrolytic manganese composite anode and preparation method thereof
CN110408790A (en) * 2018-04-27 2019-11-05 中国科学院过程工程研究所 A kind of method that pressure leaching v-bearing steel slag produces vanadium product
CN110616442A (en) * 2018-06-20 2019-12-27 云南远大金业有限公司 Ammonia process electrolytic recovery of zinc

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