CN105349800B - A kind of method and its purification tank of solution of zinc sulfate displacement removal of impurities - Google Patents
A kind of method and its purification tank of solution of zinc sulfate displacement removal of impurities Download PDFInfo
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- CN105349800B CN105349800B CN201510796081.5A CN201510796081A CN105349800B CN 105349800 B CN105349800 B CN 105349800B CN 201510796081 A CN201510796081 A CN 201510796081A CN 105349800 B CN105349800 B CN 105349800B
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Abstract
The invention discloses the method and its purification tank of a kind of solution of zinc sulfate displacement removal of impurities, belong to Zinc Hydrometallurgy Technology field.The purification tank includes feed tube, purification tank cell wall, purification tank bottom land, purification tank cover plate, mixer, exhaust column, drain pipe, also include filter plate, the filter plate is located at the lower section of internal, the described agitating paddle of the purification tank cell body, the top of the drain pipe, the filter plate is provided with filter opening, and zinc metal sheet is housed on the filter plate.The method of the solution of zinc sulfate displacement removal of impurities, is to be realized by above-mentioned purification tank, i.e., by pending solution of zinc sulfate, after line replacement copper removal cadmium cobalt is entered in the purification tank, obtains treated solution of zinc sulfate and impurity.The present invention can not only effectively replace the copper cadmium cobalt foreign ion in solution of zinc sulfate, and the zinc metal sheet amount of displacement copper cadmium cobalt impurity consumption can be greatly lowered, and reduce displacement removal of impurities cost, can also obtain the copper cadmium cobalt residue of higher degree, moreover it is possible to improve production on-site environment.
Description
Technical field
The present invention relates to the method and its purification tank of a kind of solution of zinc sulfate displacement removal of impurities, belongs to Zinc Hydrometallurgy Technology neck
Domain.
Background technology
In the production process of metal zinc ingot product, the zinc ingot metal product for having 85% or so is to use zinc hydrometallurgy production technology
Flow.Traditional zinc hydrometallurgy production technology trunk flow has five main processes, i.e. Fluidized Bed Roast of Zinc Concentrates and flue gas
Relieving haperacidity, zinc oxide leaching, Purification of zinc sulfate solution, the electrolysis of sulfuric acid zinc purification fluid and zinc metal sheet founding, leached mud volatilization are handled.In zinc
During concentrate fluidized bed roasting and flue gas acid preparing, the zinc sulphide in concentrate is oxidized to zinc oxide and sulfur dioxide, sulfur dioxide
The concentrated sulfuric acid is obtained into flue gas and after gas cleaning, Sulphur Dioxide, sulfur trioxide absorption；Oxidized zinc products are commonly called as zinc
Calcining, it is sent into leaching process.In leaching process, leaching agent is electrolysis waste solution, and supplements a small amount of sulfuric acid, after leaching,
Zinc oxide and sulfuric acid reaction in calcining, generate soluble zinc sulfate, enter solution, in order to ensure the leaching rate of zinc, leaching
Going out process often has two sections, has plenty of three sections or four sections leachings, while in order to ensure the quality of leachate, neutrality leaching is must not
Can be less, the leached mud for leaching to obtain send Slag treatment process, and solution of zinc sulfate is sent in the neutral leachate that neutral leaching obtains
Purification process.For neutral leachate in purification process, cleanser is mainly industrial zinc power, and after being purified by zinc powder, zinc sulfate is molten
The major impurities such as copper, cadmium, arsenic, antimony, cobalt, nickel in liquid are removed.Remove the sulfuric acid of the major impurities such as copper, cadmium, arsenic, antimony, cobalt, nickel
Zinc purification fluid, electrolytic process is sent to, in the presence of direct current, the zinc ion in solution of zinc sulfate is changed into zinc metal from solution
Middle precipitation, electrolytic zinc plate is obtained, zinc ingot metal product is obtained after electrolytic zinc plate founding.The slag that leaching process obtains, it is incorporated coal or coke
Afterwards, it is sent to the vaporization at high temperature equipment such as equipment such as rotary kiln, fuming furnace to handle, reclaims zinc metal therein.
In leaching process, obtained middle supernatant solution, generally containing Cu0.2~2.0g/L, Cd0.2~2.0g/L,
Co0.005~0.05g/L, Zn120~180g/L, pH5.0~5.4.Being presently used for Purification of zinc sulfate solution, (purification is substantially
Displacement reaction, therefore purification process, also referred to as replacement process) capital equipment of copper removal cadmium cobalt is conventional purge groove.
Conventional purge groove is typically cylinder type, and outside is reinforced concrete structure or steel construction, and inside is lined with anti-corrosion material,
Some purification trench bottoms are tapered, and purification tank is furnished with mixer, and feed tube is arranged at the top of purification tank, and drain pipe is arranged at bottom, some
Purification tank goes out liquid from bottom liquid inlet from upper lateral part.When conventional purge groove is used for solution of zinc sulfate displacement copper removal cadmium cobalt, displacer is
Industrial zinc power, effective zinc of zinc powder is 80~93%, and 0.025~0.150mm of granularity, zinc powder is added in groove from top, is being stirred
Under machine effect, industrial zinc power enters line replacement with the copper ion in solution, cadmium ion, cobalt ions and reacted, and the zinc metal in zinc powder turns
Turn to zinc ion and enter solution, copper ion, cadmium ion, cobalt ions are replaced, and it is small to be separately converted to the small solid of metallic copper, cadmium metal
The small solid of solid, metallic cobalt, is separated out from solution, after filter press carries out separation of solid and liquid, realizes that solution removes the mesh of copper cadmium
's.
When conventional purge groove is used for solution of zinc sulfate displacement copper removal cadmium cobalt, there is the advantages of production efficiency is high, 60~80
Under conditions of DEG C, the time of copper removal cadmium is 60~90min.Because production efficiency is high, therefore, low equipment investment, take up an area small.
But when purification tank is used for solution of zinc sulfate displacement copper removal cadmium cobalt, the consumption of industrial zinc power is very big, causes to be produced into
This height, reduce economic benefit.In the copper removal stage, the consumption of industrial zinc power is at least the 110% of theoretical requirement, and except
Cadmium stage, the consumption of industrial zinc power are at least the 200% of theoretical requirement.If the cadmium displacement of solution is very thorough,
The superfluous value of zinc powder is very big, usually more than the 300% of theoretical requirement, bigger during except cobalt, reaches more than 30 times of theoretical value, leads
The reason for causing actual consumption amount significantly to exceed theoretical requirement has three, first, effective zinc of industrial zinc power is relatively low, generally only
Have 85%, zinc powder activity is relatively low, and two be due to the copper-cadmium slag granularity difference very little that industrial zinc power obtains with displacement, it is impossible in time will be anti-
The copper-cadmium slag solid matter that should be generated is separated, and copper-cadmium slag solid matter forms local parcel to zinc powder, further reduces
The reactivity of zinc powder, third, after displacement reaction terminates, the defects of due to equipment itself, it can not will be not engaged in the surplus of reaction
Remaining zinc powder is separated with copper-cadmium slag, and the remaining zinc powder for making to be not engaged in reaction is also entered in copper-cadmium slag, ultimately results in disappearing for zinc powder
Consumption is very big, generally reaches 3~10kg/m3Solution.
The content of the invention
The purpose of the present invention is to make up the deficiencies in the prior art, there is provided a kind of method of solution of zinc sulfate displacement removal of impurities and its
Purification tank.The present invention is adapted to processing solution of zinc sulfate, using zinc metal sheet as cleanser, zinc can be realized to the copper in solution of zinc sulfate
Cadmium cobalt foreign ion displacement, there is zinc metal sheet to consume, and small, production cost is low, the displacement of copper cadmium cobalt impurity is thorough, site environment is good
The advantages of.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of purification tank of solution of zinc sulfate displacement removal of impurities,
Including feed tube, purification tank cell wall, purification tank bottom land, purification tank cover plate, mixer, exhaust column and drain pipe, the purification tank
Cell wall, purification tank bottom land and purification tank cover plate composition purification tank cell body, the mixer include motor, support, agitating shaft and stirred
Oar is mixed, described motor and support are centrally placed in purification tank cover plate, and the agitating shaft and agitating paddle are centrally placed in purification
The inside of groove cell body, the feed tube positioned at purification tank cover plate side, the exhaust column positioned at purification tank cover plate with it is described enter
The relative side of liquid pipe, the drain pipe are located at the bottom of purification tank cell wall, in addition to filter plate, the filter plate are located at the purification
Inside groove cell body, and filter opening, the filter are provided with positioned at lower section, the top of the drain pipe of the agitating paddle, the filter plate
Zinc metal sheet is housed on plate.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, the filter opening on the filter plate is uniformly distributed, and filter opening quantity is 10000~50000, and filter opening aperture is 4
~20mm, the spacing between adjacent filter opening is 5~20mm.
Further, the length of the zinc metal sheet is 20~200mm, width is 10~50mm, thickness is 1~3mm.
A kind of method of solution of zinc sulfate displacement removal of impurities, this method is realized by the purification tank described in as above any one, is wrapped
Include following steps：It is respectively 0.2~2.0g/L, 0.2~2.0g/L, 0.005~0.050g/ by copper, cadmium, cobalt, zinc mass concentration
L, 120~180g/L, the pending solution of zinc sulfate that pH value is 5.0~5.4, enter line replacement removal of impurities in the purification tank
Afterwards, treated solution of zinc sulfate and impurity are obtained.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, in treated solution of zinc sulfate copper, cadmium, cobalt, the mass concentration of zinc be respectively 0.00005~
0.0002g/L, 0.0002~0.0005g/L, 0.0003~0.0005g/L, 120.4~184.2g/L, pH value are 5.2~5.4,
The impurity is copper, cadmium, cobalt.
Further, concretely comprising the following steps for line replacement copper removal cadmium cobalt impurity is entered in the purification tank：Pending zinc sulfate
Solution is flowed into the purification tank cell body from the feed tube, starts the motor of mixer, and agitating shaft and agitating paddle start running,
The pending solution of zinc sulfate occurs displacement with the zinc metal sheet on the filter plate and reacted, in the pending solution of zinc sulfate
Impurity separated out from solution, and by the filter opening pass in and out filter plate, displacement reaction terminate after, treated solution of zinc sulfate and
The mixture of impurity is flowed out outside purification tank by the drain pipe, and the zinc metal sheet residue for having neither part nor lot in reaction is retained by filter plate, is continued
Rest on filter plate and participate in next dedoping step, gas is taken out by the exhaust column caused by the steam of solution of zinc sulfate and reaction
Walk, the mixture is finally subjected to separation of solid and liquid, that is, respectively obtains treated solution of zinc sulfate and impurity.
Further, the time of the displacement reaction is 1~3 hour.
Further, the removal of impurities cleans for step removal of impurities or substep.
Further, the step removal of impurities is to remove copper, cadmium, cobalt simultaneously；The substep removal of impurities is first step copper removal, second step
Except cadmium, the 3rd step remove cobalt, or first step copper removal, cadmium, second step removes cobalt.
Further, gas caused by the reaction is hydrogen.
Further, gas caused by the reaction is hydrogen.
Above-mentioned course of reaction is：
Zn+2H+=Zn2++H2↑
The purification tank of the present invention, its operation principle are as follows：Containing impurity copper, cadmium, cobalt metal ion solution of zinc sulfate from
After feed tube flows into purification cell body, solution moves in the presence of mixer in groove, is contacted with the zinc metal sheet in purification tank, in zinc
There occurs replacing to react, copper, cadmium, the cobalt foreign ion in solution are replaced by metallic zinc, take part in the gold of displacement reaction on piece surface
Category zinc be changed into solubility zinc ion enter solution, copper, cadmium, cobalt foreign ion separate out from solution, generate metallic copper, cadmium,
The small solid of cobalt, is commonly called as copper cadmium cobalt residue；The small solid of metallic copper, cadmium, cobalt, in the agitation of mixer and the dual-impingement of motion solution
Under, depart from zinc metal sheet surface and with solution motion, with the continuous progress of stirring, displacement is reacted also in continuous carry out, solution
In copper cadmium cobalt foreign ion constantly replaced by zinc granule or zinc metal sheet, concentration impurity ion is more and more lower, reacts the copper cadmium cobalt of generation
Slag solid matter is more and more；After 1~3 hour, after displacement reaction is compared fully, the copper cadmium cobalt foreign ion in solution is
Through seldom, copper cadmium cobalt concentration impurity ion is very low, has reached the purpose for sloughing impurity copper cadmium ion, purification and impurity removal process knot
Beam；Finally, it is saturating to complete the copper cadmium cobalt residue that displacement is reacted the solution for sloughing impurity copper cadmium cobalt ions and generated in displacement course of reaction
Filter bores are flowed to outside purification tank from drain pipe, and the residual zinc metal sheet for being not engaged in reaction is retained by filter plate, remains in purification tank
It is interior, participate in the displacement removal of impurities reaction of next cycle；The solution and copper cadmium cobalt residue mixture flowed to outside purification tank, enters through filter press
After row separation of solid and liquid, obtain copper cadmium cobalt residue and slough the solution of zinc sulfate of impurity, the copper cadmium cobalt impurity in solution is thorough
Separation, has reached the purpose for sloughing impurity copper cadmium.The zinc metal sheet amount consumed according to displacement copper removal cadmium cobalt, is periodically supplemented into purification tank
Zinc metal sheet.
The beneficial effects of the invention are as follows：
1. zinc metal wastage is small.The displacer that the present invention uses is zinc metal sheet, and zinc metal sheet is the very high metallic zinc of purity, effectively
Zn content is close to 100%；In course of reaction is replaced, the small solid of metallic copper, cadmium, cobalt of generation is reacted, in the agitation of mixer
Under the dual-impingement effect of motion solution, it can be separated in time from zinc metal sheet surface, because the granularity of zinc metal sheet is more than the filter of filter plate
Hole, retained, remained in purification tank by filter plate, so there was only metal as solution is flow in the substitute outside purification tank
The small solid of copper, cadmium, cobalt, does not take away zinc metal sheet metal, does not cause zinc metal sheet to waste, and the consumption of metal zinc metal sheet is completely used for displacement instead
Should, therefore the consumption very little of zinc metal sheet, almost close to theoretical consumption, only 0.4~4kg/m3Solution.Further, since metal
Zinc metal sheet is not entered into replacement slag, and therefore, obtained replacement slag purity is very high, after simple process, it is possible to form crude product.
2. copper removal cadmium cobalt is thorough.In replacement process, the small solid of metallic copper, cadmium, cobalt of generation is reacted, in stirring for mixer
Under dynamic and motion solution dual-impingement effect, it can be separated in time from zinc metal sheet surface, the surface of zinc metal sheet is not generated by reaction
Copper cadmium cobalt residue solid matter parcel, there is larger surface area to be contacted with solution all the time, it is ensured that the chemism of zinc metal sheet, effectively
Diadochy of the zinc metal sheet to copper cadmium cobalt is ensure that, with the continuous progress of displacement reaction, the final copper cadmium thoroughly removed in solution
Cobalt foreign ion.
3. the ability of being applicable is strong.The purification tank of the present invention, it can be used for step purification while remove copper cadmium cobalt foreign ion,
It can be used for step-by-step replacement, first remove copper foreign ion, then remove cadmium foreign ion, finally remove cobalt foreign ion, or first remove
Copper cadmium foreign ion is removed, then removes cobalt foreign ion.During copper removal cadmium cobalt foreign ion is reacted in displacement, control can be passed through
The parameters such as the temperature of solution processed, liquid inventory, the surface area of zinc metal sheet, reaction time, realize and copper cadmium cobalt ions is removed to solution
Accurate control；Because when replacing copper removal cadmium foreign ion, the oxidizing potential of copper ion is higher than cadmium ion, the oxidation electricity of cobalt ions
Position, therefore, copper ion is replaced prior to cadmium ion and cobalt ions, and is reduced to the small solid of metallic copper, when by accurately controlling
During the parameters such as the temperature of solution, liquid inventory, the surface area of zinc metal sheet, reaction time, it can realize in purification tank, only displacement removes
Copper foreign ion is removed, does not replace and removes cadmium, cobalt foreign ion, cadmium foreign ion can be set under conditions of temperature is less than 80 DEG C
Change, removed again in follow-up second step purification process, and cobalt ions must can be just replaced in temperature higher than more than 85 DEG C, most
Cobalt foreign ion is removed again afterwards, so as to reach the purpose of step-by-step replacement copper removal cadmium cobalt.
4. site environment is good.Traditional purification tank, using industrial zinc power as cleanser, the granularity of zinc powder is small, in zinc powder
Transportation and add cell body when, all more or less occur dust from flying, both caused zinc metal loss, and polluted scene again
Environment.The purification tank of the present invention, using zinc metal sheet as cleanser, particle diameter is big, will not be caused in transportation and addition cell body
Dust from flying, therefore, operating environment are friendly.
Brief description of the drawings
Fig. 1 is the front view of the purification tank of the present invention.
In accompanying drawing, the list of parts representated by each label is as follows：
1st, feed tube, 2, purification tank cell wall, 3, purification tank bottom land, 4, purification tank cover plate, 5, mixer, 6, filter plate, 7, take out
Airduct, 8, drain pipe.
Embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
Embodiment 1
As shown in figure 1, including feed tube 1, purification tank cell wall 2, purification tank bottom land 3, purification tank cover plate 4, mixer 5, take out
Airduct 7 and drain pipe 8, the purification tank cell wall 2, purification tank bottom land 3 and purification tank cover plate 4 form purification tank cell body, described net
Change groove cell wall 2, purification tank bottom land 3 and purification tank cover plate 4 and form purification tank cell body, cell body is the thick armored concrete knots of 300mm
Structure, thickness of inner lining 50mm have anticorrosive tile, and cell body inside dimension is Φ 3.6m × H4.0m, total measurement (volume) 40.7m3, dischargeable capacity
For 35m3。
The mixer 5 includes motor, support, agitating shaft and agitating paddle, and described motor and support are centrally placed in only
Change in tank cover plate 4, the agitating shaft and agitating paddle are centrally placed in the inside of purification tank cell body, and the power of motor of mixer 5 is
30kW, motor speed 1470n/min, mixer rotating speed are 85n/min.
The feed tube 1 is positioned at the side of purification tank cover plate 4, and the exhaust column 7 is positioned at purification tank cover plate 4 and the feed liquor
The relative side of pipe 1, the drain pipe 8 are located at the bottom of purification tank cell wall 2, and the caliber of feed tube 1 is 150mm, drain pipe 2
Caliber is 200mm.
Also including filter plate 6, the filter plate 6 is located inside the purification tank cell body, and positioned at the lower section of the agitating paddle, institute
The top of drain pipe 8 is stated, filter plate 6 is thickness 8mm titanium plate.
The filter plate 6 is provided with filter opening, and the filter opening on filter plate 6 is uniformly distributed, and the number of filter opening is 50000, and aperture is
4mm, the spacing between adjacent filter opening is 5mm.
4t zinc metal sheets are housed, the length of the zinc metal sheet is 20mm, width 10mm, thickness on the filter plate 6 in the purification tank
For 1mm.
A kind of solution of zinc sulfate replaces the method to clean, and this method is realized by purification tank as described above, including following
Step：It is respectively that 0.2g/L, 0.2g/L, 0.005g/L, 120g/L, pH value are 5.0 to wait to locate by copper, cadmium, cobalt, zinc mass concentration
The 30m of reason3Solution of zinc sulfate, the purification tank cell body is flowed into from the feed tube 1, starts the motor of mixer 5, agitating shaft
Started running with agitating paddle, with the zinc metal sheet on the filter plate 6 displacement reaction occurs for the pending solution of zinc sulfate, described to treat
Impurity in the solution of zinc sulfate of processing separates out from solution, and passes in and out filter plate displacement reaction in 6,1~3 hour by the filter opening
After end, the mixture of treated solution of zinc sulfate and impurity is flowed out outside purification tank by the drain pipe 8, has neither part nor lot in reaction
Zinc metal sheet residue retained by filter plate 6, remain on filter plate 6 and participate in next dedoping step, the steam of solution of zinc sulfate
With reaction caused by hydrogen taken away by the exhaust column 7, finally by the mixture carry out separation of solid and liquid, that is, respectively obtain cupric
0.0001g/L, cadmium 0.0005g/L, cobalt 0.0003g/L, zinc 120.3g/L, pH5.2 treated solution of zinc sulfate 29.9m3
With containing zinc 9.2%, copper 40.1%, cadmium 39.8%, cobalt 1.1% copper cadmium cobalt residue 15kg.
The present embodiment can realize a step while remove three kinds of foreign ions of copper cadmium cobalt.After completing separation of solid and liquid every time, toward only
Change and zinc metal sheet 12kg is added in groove.
Embodiment 2
As shown in figure 1, including feed tube 1, purification tank cell wall 2, purification tank bottom land 3, purification tank cover plate 4, mixer 5, take out
Airduct 7 and drain pipe 8, the purification tank cell wall 2, purification tank bottom land 3 and purification tank cover plate 4 form purification tank cell body, described net
Change groove cell wall 2, purification tank bottom land 3 and purification tank cover plate 4 and form purification tank cell body, cell body is the thick armored concrete knots of 300mm
Structure, thickness of inner lining 50mm have anticorrosive tile, and cell body inside dimension is Φ 4.6m × H5.0m, total measurement (volume) 83.0m3, dischargeable capacity
For 70m3。
The mixer 5 includes motor, support, agitating shaft and agitating paddle, and described motor and support are centrally placed in only
Change in tank cover plate 4, the agitating shaft and agitating paddle are centrally placed in the inside of purification tank cell body, and the power of motor of mixer 5 is
55kW, motor speed 1470n/min, mixer rotating speed are 85n/min.
The feed tube 1 is positioned at the side of purification tank cover plate 4, and the exhaust column 7 is positioned at purification tank cover plate 4 and the feed liquor
The relative side of pipe 1, the drain pipe 8 are located at the bottom of purification tank cell wall 2, and the caliber of feed tube 1 is 150mm, drain pipe 2
Caliber is 200mm.
Also including filter plate 6, the filter plate 6 is located inside the purification tank cell body, and positioned at the lower section of the agitating paddle, institute
The top of drain pipe 8 is stated, filter plate 6 is thickness 12mm stainless steel plate.
The filter plate 6 is provided with filter opening, and the filter opening on filter plate 6 is uniformly distributed, and the number of filter opening is 30000, and aperture is
10mm, the spacing between adjacent filter opening is 10mm.
15t zinc metal sheets are housed, the length of the zinc metal sheet is 100mm, width is on the filter plate 6 in every purification tank
30mm, thickness 2.0mm.
A kind of solution of zinc sulfate replaces the method to clean, and this method is realized by purification tank as described above, including following
Step：
(1) it is respectively 1.0g/L, 1.0g/L, 0.02g/L, 150g/L, pH value 5.2 by copper, cadmium, cobalt, zinc mass concentration
Pending 70m3Solution of zinc sulfate, first purification tank cell body is flowed into from the feed tube 1, in the bar that temperature is 75 DEG C
Under part, the motor of mixer 5 is started, agitating shaft and agitating paddle start running, the pending solution of zinc sulfate and the filter
Zinc metal sheet on plate 6 occurs displacement and reacted, and the impurity in the pending solution of zinc sulfate separates out from solution, and by described
Filter opening passes in and out filter plate 6, and after 1h displacement reactions terminate, the mixture of treated solution of zinc sulfate and impurity passes through the drain pipe
Outside 8 first purification tank of outflow, the zinc metal sheet residue for having neither part nor lot in reaction is retained by filter plate 6, remains on filter plate 6 under participating in
One dedoping step, hydrogen caused by the steam of solution of zinc sulfate and reaction are taken away by the exhaust column 7, finally by the mixing
Thing 100m2Chamber-type press filter carry out separation of solid and liquid after, obtain cupric 0.0006g/L, cadmium 0.99g/L, cobalt 0.02g/L, zinc
151.0/L, pH5.4 solution of zinc sulfate 69.9m3With containing zinc 18.7%, copper 75.7%, cadmium 0.4%, cobalt 0.11% copper ashes
92kg.This step realizes only copper removal ionic impurity, does not remove cadmium, cobalt foreign ion.After completing separation of solid and liquid every time, toward first
Zinc metal sheet 76kg is added in purification tank.
(2) it is respectively 0.0006g/L, 0.99g/L, 0.02g/L, 151.0g/L, pH value by copper, cadmium, cobalt, zinc mass concentration
For 5.4 pending 69.9m3Solution of zinc sulfate, it is pumped up being flowed into second purification tank cell body from the feed tube 1,
Under conditions of temperature is 75 DEG C, the motor of mixer 5 is started, agitating shaft and agitating paddle start running, the pending sulfuric acid
Zinc solution occurs displacement with the zinc metal sheet on the filter plate 6 and reacted, and the impurity in the pending solution of zinc sulfate is from solution
Separate out, and filter plate 6 is passed in and out by the filter opening, after 1h displacement reactions terminate, the mixing of treated solution of zinc sulfate and impurity
Thing is flowed out outside second purification tank by the drain pipe 8, and the zinc metal sheet residue for having neither part nor lot in reaction is retained by filter plate 6, continues to stop
Stay on filter plate 6 and participate in next dedoping step, hydrogen caused by the steam of solution of zinc sulfate and reaction is taken out by the exhaust column 7
Walk, finally by the mixture 100m2Chamber-type press filter carry out separation of solid and liquid after, obtain cupric 0.0002g/L, cadmium
0.0006g/L, cobalt 0.02g/L, zinc 151.6/L, pH5.4 solution of zinc sulfate 69.8m3With containing zinc 19.6%, copper 0.2%, cadmium
69.4%th, the cadmium slag 99kg of cobalt 0.06%.This step realizes that second step removes cadmium ion impurity, does not remove cobalt foreign ion.Every time
After completing separation of solid and liquid, zinc metal sheet 57kg is added into second purification tank.
(3) it is respectively 0.0002g/L, 0.0006g/L, 0.02g/L, 151.0g/L, pH by copper, cadmium, cobalt, zinc mass concentration
It is worth the pending 69.8m for 5.43Solution of zinc sulfate, it is pumped up being flowed into the 3rd purification tank cell body from the feed tube 1,
Add 1.2kg antimony oxide powder simultaneously, under conditions of temperature is 90 DEG C, start the motor of mixer 5, agitating shaft and
Agitating paddle starts running, and with the zinc metal sheet on the filter plate 6 displacement reaction occurs for the pending solution of zinc sulfate, described to wait to locate
Impurity in the solution of zinc sulfate of reason separates out from solution, and passes in and out filter plate 6 by the filter opening, after 1h displacement reactions terminate,
Treated solution of zinc sulfate and the mixture of impurity is flowed out outside the 3rd purification tank by the drain pipe 8, has neither part nor lot in reaction
Zinc metal sheet residue retained by filter plate 6, remain on filter plate 6 and participate in next dedoping step, the steam of solution of zinc sulfate
With reaction caused by hydrogen taken away by the exhaust column 7, finally by the mixture 100m2Chamber-type press filter carry out solid-liquid
After separation, cupric 0.00005g/L, cadmium 0.0002g/L, cobalt 0.0004g/L, zinc 151.6/L, pH5.4 solution of zinc sulfate are obtained
69.8m3With containing zinc 48.7%, copper 0.15%, cadmium 0.5%, cobalt 19.1% cobalt slag 3kg.This step realizes that the 3rd step removes cobalt
Foreign ion.After completing separation of solid and liquid every time, zinc metal sheet 2kg is added into the 3rd purification tank.
Embodiment 3
As shown in figure 1, including feed tube 1, purification tank cell wall 2, purification tank bottom land 3, purification tank cover plate 4, mixer 5, take out
Airduct 7 and drain pipe 8, the purification tank cell wall 2, purification tank bottom land 3 and purification tank cover plate 4 form purification tank cell body, described net
Change groove cell wall 2, purification tank bottom land 3 and purification tank cover plate 4 and form purification tank cell body, cell body is the thick armored concrete knots of 300mm
Structure, thickness of inner lining 50mm have anticorrosive tile, and cell body inside dimension is Φ 4.6m × H5.0m, total measurement (volume) 83.0m3, dischargeable capacity
For 70m3。
The mixer 5 includes motor, support, agitating shaft and agitating paddle, and described motor and support are centrally placed in only
Change in tank cover plate 4, the agitating shaft and agitating paddle are centrally placed in the inside of purification tank cell body, and the power of motor of mixer 5 is
55kW, motor speed 1470n/min, mixer rotating speed are 85n/min.
The feed tube 1 is positioned at the side of purification tank cover plate 4, and the exhaust column 7 is positioned at purification tank cover plate 4 and the feed liquor
The relative side of pipe 1, the drain pipe 8 are located at the bottom of purification tank cell wall 2, and the caliber of feed tube 1 is 150mm, drain pipe 2
Caliber is 200mm.
Also including filter plate 6, the filter plate 6 is located inside the purification tank cell body, and positioned at the lower section of the agitating paddle, institute
The top of drain pipe 8 is stated, filter plate 6 is thickness 14mm stainless steel plate.
The filter plate 6 is provided with filter opening, and the filter opening on filter plate 6 is uniformly distributed, and the number of filter opening is 10000, and aperture is
20mm, the spacing between adjacent filter opening is 20mm.
26t zinc metal sheets are housed, the length of the zinc metal sheet is 200mm, width is on the filter plate 6 in every purification tank
50mm, thickness 3.0mm.
A kind of solution of zinc sulfate replaces the method to clean, and this method is realized by purification tank as described above, including following
Step：
(1) it is respectively treating for 2.0g/L, 2.0g/L, 0.050g/L, 180g/L, pH5.4 by copper, cadmium, cobalt, zinc mass concentration
The 70m of processing3Solution of zinc sulfate, first purification tank cell body is flowed into from the feed tube 1, in the condition that temperature is 65 DEG C
Under, the motor of mixer 5 is started, agitating shaft and agitating paddle start running, the pending solution of zinc sulfate and the filter plate 6
On zinc metal sheet displacement reaction occurs, the impurity in the pending solution of zinc sulfate separates out from solution, and passes through the filter
Hole passes in and out filter plate 6, and after 1h displacement reactions terminate, the mixture of treated solution of zinc sulfate and impurity passes through the drain pipe 8
Flow out outside first purification tank, the zinc metal sheet residue for having neither part nor lot in reaction is retained by filter plate 6, remains on filter plate 6 under participating in
One dedoping step, hydrogen caused by the steam of solution of zinc sulfate and reaction are taken away by the exhaust column 7, finally by the mixing
Thing 100m2Chamber-type press filter carry out separation of solid and liquid after, obtain cupric 0.0005g/L, cadmium 0.0008g/L, cobalt 0.05g/L,
Zinc 183.2g/L, pH5.3 solution of zinc sulfate 69.7m3With containing zinc 11.8%, copper 39.6%, cadmium 39.5%, cobalt 0.02% copper ashes
349kg.This step realizes that the first step removes copper, cadmium ion impurity from solution, does not remove cobalt ions impurity.Solid-liquid is completed every time
After separation, zinc metal sheet 289kg is added into first purification tank.
(2) it is respectively 0.0005g/L, 0.0008g/L, 0.05g/L, 183.2g/L, pH by copper, cadmium, cobalt, zinc mass concentration
It is worth the pending 69.7m for 5.33Solution of zinc sulfate, it is pumped up being flowed into second purification tank cell body from the feed tube 1,
3kg antimony oxide powder is added simultaneously, under conditions of temperature is 95 DEG C, starts the motor of mixer 5, agitating shaft and is stirred
Mix oar to start running, with the zinc metal sheet on the filter plate 6 displacement reaction occurs for the pending solution of zinc sulfate, described pending
Solution of zinc sulfate in impurity separated out from solution, and pass through the filter opening pass in and out filter plate 6,2h displacement reaction terminate after, place
The solution of zinc sulfate and the mixture of impurity managed are flowed out outside second purification tank by the drain pipe 8, have neither part nor lot in reaction
Zinc metal sheet residue is retained by filter plate 6, remains on filter plate 6 and participates in next dedoping step, the steam of solution of zinc sulfate and
Hydrogen caused by reaction is taken away by the exhaust column 7, finally by the mixture 100m2Chamber-type press filter carry out solid-liquid point
From rear, cupric 0.0002g/L, cadmium 0.0004g/L, cobalt 0.0005g/L, zinc 183.2/L, pH5.4 solution of zinc sulfate are obtained
69.6m3With containing zinc 41.68%, copper 0.18%, cadmium 0.24%, cobalt 25.12% cobalt slag 14kg.This step realizes that second step removes
Remove cobalt ions impurity.After completing separation of solid and liquid every time, zinc metal sheet 10kg is added into second purification tank.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (7)
1. a kind of purification tank of solution of zinc sulfate displacement removal of impurities, including feed tube (1), purification tank cell wall (2), purification tank bottom land
(3) tank cover plate (4), mixer (5), exhaust column (7) and drain pipe (8), the purification tank cell wall (2), purification tank bottom land, are purified
(3) and purification tank cover plate (4) composition purification tank cell body, the mixer (5) include motor, support, agitating shaft and agitating paddle, institute
The motor and support stated are centrally placed in purification tank cover plate (4), and the agitating shaft and agitating paddle are centrally placed in purification tank groove
The inside of body, the feed tube (1) is positioned at the side of purification tank cover plate (4), and the exhaust column (7) is positioned at purification tank cover plate (4)
The relative side with the feed tube (1), the drain pipe (8) are located at the bottom of purification tank cell wall (2), it is characterised in that also
Including filter plate (6), the filter plate (6) is located inside the purification tank cell body, and positioned at the agitating paddle lower section, it is described go out liquid
The top of (8) is managed, the filter plate (6) is provided with filter opening, and zinc metal sheet is housed on the filter plate (6), and the filter opening on the filter plate (6) is equal
Even distribution, filter opening quantity are 10000~50000, and filter opening aperture be 4~20mm, the spacing between adjacent filter opening is 5~
20mm, the length of the zinc metal sheet is 20~200mm, width is 10~50mm, thickness is 1~3mm.
A kind of 2. method of solution of zinc sulfate displacement removal of impurities, it is characterised in that this method by purifying as claimed in claim 1
Groove is realized, is comprised the following steps：It is respectively 0.2~2.0g/L, 0.2~2.0g/L, 0.005 by copper, cadmium, cobalt, zinc mass concentration
~0.050g/L, 120~180g/L, the pending solution of zinc sulfate that pH value is 5.0~5.4, are carried out in the purification tank
After displacement removal of impurities, treated solution of zinc sulfate and impurity is obtained, line replacement copper removal cadmium cobalt impurity is entered in the purification tank
Concretely comprise the following steps：Pending solution of zinc sulfate is flowed into the purification tank cell body from the feed tube (1), starts mixer
(5) motor, agitating shaft and agitating paddle start running, the pending solution of zinc sulfate and the zinc metal sheet on the filter plate (6)
Generation displacement is reacted, and the impurity in the pending solution of zinc sulfate separates out from solution,
And filter plate (6) is passed in and out by the filter opening, and after displacement reaction terminates, the mixture of treated solution of zinc sulfate and impurity
Flowed out by the drain pipe (8) outside purification tank, the zinc metal sheet residue for having neither part nor lot in reaction is retained by filter plate (6), remains in
Next dedoping step is participated on filter plate (6), gas caused by the steam of solution of zinc sulfate and reaction is taken out by the exhaust column (7)
Walk, the mixture is finally subjected to separation of solid and liquid, that is, respectively obtains treated solution of zinc sulfate and impurity.
3. the method for a kind of solution of zinc sulfate displacement removal of impurities according to claim 2, it is characterised in that treated
In solution of zinc sulfate copper, cadmium, cobalt, the mass concentration of zinc be respectively 0.00005~0.0002g/L, 0.0002~0.0005g/L,
0.0003~0.0005g/L, 120.4~184.2g/L, pH value are 5.2~5.4, and the impurity is copper, cadmium, cobalt.
A kind of 4. method of solution of zinc sulfate displacement removal of impurities according to claim 2, it is characterised in that the displacement reaction
Time be 1~3 hour.
5. the method for a kind of solution of zinc sulfate displacement removal of impurities according to claim 2, it is characterised in that the removal of impurities is one
Step removal of impurities or substep clean.
A kind of 6. method of solution of zinc sulfate displacement removal of impurities according to claim 5, it is characterised in that the step removal of impurities
To remove copper, cadmium, cobalt simultaneously；The substep removal of impurities is first step copper removal, second step removes cadmium, the 3rd step removes cobalt, or the first step is removed
Copper, cadmium, second step remove cobalt.
7. the method for a kind of solution of zinc sulfate displacement removal of impurities according to claim 2, it is characterised in that the reaction produces
Gas be hydrogen.
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