CN115043470A - Method for removing aluminum from aluminum-containing zinc sulfate solution - Google Patents
Method for removing aluminum from aluminum-containing zinc sulfate solution Download PDFInfo
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- CN115043470A CN115043470A CN202210645401.7A CN202210645401A CN115043470A CN 115043470 A CN115043470 A CN 115043470A CN 202210645401 A CN202210645401 A CN 202210645401A CN 115043470 A CN115043470 A CN 115043470A
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- aluminum
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 123
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 41
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 title claims abstract description 31
- 229960001763 zinc sulfate Drugs 0.000 title claims abstract description 31
- 229910000368 zinc sulfate Inorganic materials 0.000 title claims abstract description 31
- 239000000243 solution Substances 0.000 claims abstract description 84
- 239000000084 colloidal system Substances 0.000 claims abstract description 47
- 239000000706 filtrate Substances 0.000 claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 238000000926 separation method Methods 0.000 claims abstract description 27
- 239000012266 salt solution Substances 0.000 claims abstract description 21
- 239000003463 adsorbent Substances 0.000 claims abstract description 20
- 239000007787 solid Substances 0.000 claims abstract description 19
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 24
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 16
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 9
- 229920002401 polyacrylamide Polymers 0.000 claims description 9
- 239000000292 calcium oxide Substances 0.000 claims description 8
- 235000012255 calcium oxide Nutrition 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 5
- 239000002639 bone cement Substances 0.000 claims description 4
- UOURRHZRLGCVDA-UHFFFAOYSA-D pentazinc;dicarbonate;hexahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[O-]C([O-])=O.[O-]C([O-])=O UOURRHZRLGCVDA-UHFFFAOYSA-D 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 19
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 17
- 239000011701 zinc Substances 0.000 abstract description 17
- 229910052725 zinc Inorganic materials 0.000 abstract description 17
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000009854 hydrometallurgy Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 6
- 239000006228 supernatant Substances 0.000 abstract description 5
- -1 aluminum ion Chemical class 0.000 abstract description 2
- 230000008719 thickening Effects 0.000 abstract description 2
- WDYMMLFNWBOKFO-UHFFFAOYSA-L aluminum;zinc;sulfate Chemical compound [Al+3].[Zn+2].[O-]S([O-])(=O)=O WDYMMLFNWBOKFO-UHFFFAOYSA-L 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 10
- 238000003756 stirring Methods 0.000 description 9
- 238000003723 Smelting Methods 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 239000002562 thickening agent Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 3
- 239000008394 flocculating agent Substances 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052598 goethite Inorganic materials 0.000 description 1
- AEIXRCIKZIZYPM-UHFFFAOYSA-M hydroxy(oxo)iron Chemical compound [O][Fe]O AEIXRCIKZIZYPM-UHFFFAOYSA-M 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a method for removing aluminum from an aluminum-containing zinc sulfate solution, which comprises the following steps: (1) mixing the weak base salt solution and the aluminum-containing zinc sulfate solution, and then carrying out solid-liquid separation to obtain a filtrate containing aluminum colloid; (2) mixing the filtrate containing the aluminum colloid with a flocculant solution; (3) and (3) mixing the flocculated liquid obtained in the step (2) with an adsorbent, and then carrying out solid-liquid separation. Therefore, the method can effectively solve the problems of poor ore pulp settleability and production interruption caused by high solid content of supernatant in the zinc hydrometallurgy solution removed by an iron oxide method in the prior art due to aluminum ion enrichment, ensures continuous and stable operation of production, obviously reduces the failure rate of thickening equipment, increases the economic benefit of enterprises, has small loss of zinc in the solution, and simultaneously ensures the effect of removing aluminum.
Description
Technical Field
The invention belongs to the field of zinc hydrometallurgy, and particularly relates to a method for removing aluminum from an aluminum-containing zinc sulfate solution.
Background
Aluminum usually enters a solution in the form of impurities in the wet zinc smelting process, most of aluminum is removed along with the precipitation of iron in the smelting process, and iron in the wet zinc smelting solution is removed by a neutralization method, a goethite method, an iron vitriol method and an iron oxide method, wherein the iron oxide method has poor aluminum removal effect, the aluminum gradually circularly concentrates and increases in concentration in the smelting process, the sedimentation performance of ore pulp in each section is easily influenced in the acidity reduction process, the torque of a thickener is increased and even stopped, the solid content of supernatant is high, the continuous fluctuation of production is caused, the normal operation is not realized, and the adverse influence on technical and economic indexes is caused.
Therefore, the existing iron oxide method for removing aluminum in the zinc hydrometallurgy solution needs to be improved.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, one object of the present invention is to provide a method for removing aluminum from an aluminum-containing zinc sulfate solution, which can effectively solve the problems of poor ore pulp settleability and production interruption caused by high solid content in a supernatant fluid due to aluminum ion enrichment in a zinc hydrometallurgy solution removed by an iron oxide method in the prior art, ensure continuous and stable operation of production, significantly reduce the failure rate of a concentration device, increase the economic benefit of an enterprise, and ensure the aluminum removal effect while reducing the zinc loss in the solution.
In one aspect of the invention, the invention provides a method for removing aluminum from an aluminum-containing zinc sulfate solution. According to an embodiment of the invention, the method comprises:
(1) mixing the weak base salt solution and the aluminum-containing zinc sulfate solution, and then carrying out solid-liquid separation to obtain a filtrate containing aluminum colloid;
(2) mixing the filtrate containing the aluminum colloid with a flocculant solution;
(3) and (3) mixing the flocculated liquid obtained in the step (2) with an adsorbent, and then carrying out solid-liquid separation.
According to the method for removing aluminum in the aluminum-zinc sulfate-containing solution, the weak base salt solution is mixed with the aluminum-zinc sulfate-containing solution, wherein the weak base salt solution is used as a pH regulator to enable free Al in the aluminum-zinc sulfate-containing solution 3+ Converting into aluminum-containing colloid, and performing solid-liquid separation to obtain filtrate containing aluminum colloid; mixing the filtrate containing the aluminum colloid with a flocculant solution, wherein the flocculant can aggregate the aluminum colloid in the filtrate containing the aluminum colloid, so that the aggregate containing the aluminum colloid is settled from the filtrate; and finally, mixing the flocculated liquid obtained in the previous step with an adsorbent, adsorbing aluminum-containing colloid in the flocculated liquid by using the adsorbent, carrying out solid-liquid separation after adsorption is finished, and allowing aluminum to enter slag, thereby achieving the effect of removing aluminum. Therefore, the method can effectively solve the problems of poor ore pulp settleability and production interruption caused by high solid content of supernatant in the zinc hydrometallurgy solution removed by an iron oxide method in the prior art, ensures continuous and stable operation of production, remarkably reduces the failure rate of thickening equipment, increases the economic benefit of enterprises, and has small loss of zinc in the solution and the effect of removing aluminum.
In addition, the method for removing aluminum from the aluminum-containing zinc sulfate solution according to the embodiment of the invention may further have the following additional technical features:
in some embodiments of the invention, the aluminum-containing zinc sulfate solution is heated to 60-80 ℃ in advance before the weak base salt solution is mixed with the aluminum-containing zinc sulfate solution. Therefore, the solid-liquid separation performance of the neutralized ore pulp after the weak base salt solution and the aluminum-containing zinc sulfate solution are mixed can be improved.
In some embodiments of the invention, in the step (1), the weak base salt solution is added in an amount to adjust the acidity of the aluminum-containing zinc sulfate solution to 25-50 g/L. Thereby, the free in the aluminum-containing zinc sulfate solution can be controlledAl 3+ And then the aluminum-containing colloid is converted.
In some embodiments of the invention, in step (1), the weak base salt solution has a solid content of 10 to 30 wt%. This can improve the effect of removing aluminum.
In some embodiments of the invention, in the step (1), the final acid concentration in the filtrate containing aluminum colloid is 20-50 g/L. This can improve the effect of removing aluminum.
In some embodiments of the invention, in step (1), the weak base salt comprises at least one of calcium carbonate, quicklime and basic zinc carbonate. This can improve the effect of removing aluminum.
In some embodiments of the invention, in step (2), the volume ratio of the flocculant solution to the filtrate containing aluminum colloid is 1: (600-1500). This can improve the effect of removing aluminum.
In some embodiments of the invention, in the step (2), the concentration of the flocculant solution is 2-3 wt%. This can improve the effect of removing aluminum.
In some embodiments of the invention, in step (2), the flocculant solution comprises at least one of polyacrylamide and bone glue. This can improve the effect of removing aluminum.
In some embodiments of the present invention, in the step (3), the adsorbent is added in an amount of 2 to 5g based on 1L of the post-flocculation solution.
In some embodiments of the invention, in step (3), the adsorbent comprises at least one of activated carbon and porous fibrous particles.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic flow diagram of a method for removing aluminum from an aluminum-containing zinc sulfate solution according to one embodiment of the invention.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, and the embodiments described below with reference to the accompanying drawings are exemplary and intended to be illustrative of the present invention and should not be construed as limiting the present invention.
In one aspect of the invention, the invention provides a method for removing aluminum from an aluminum-containing zinc sulfate solution. According to an embodiment of the invention, with reference to fig. 1, the method comprises:
s100: mixing weak base salt solution and aluminum-containing zinc sulfate solution, and performing solid-liquid separation
In the step, the weak base salt solution and the aluminum-containing zinc sulfate solution are mixed and then subjected to solid-liquid separation, and the filtrate containing aluminum colloid is obtained. Specifically, the weak base salt solution is used as a pH regulator, and the addition amount of the weak base salt solution is based on the adjustment of the acidity of the aluminum-containing zinc sulfate solution to 25-50 g/L, so that free Al in the aluminum-containing zinc sulfate solution is obtained 3+ And (3) converting the aluminum-containing colloid into an aluminum-containing colloid, and performing solid-liquid separation to obtain a filtrate containing the aluminum-containing colloid, wherein the final acid concentration in the filtrate containing the aluminum-containing colloid is 25-50 g/L. The inventors have found that if the final acid concentration is too high, the effect of removing aluminum is deteriorated, and if the final acid concentration is too low, hydrolysis of zinc is likely to occur. Therefore, by adopting the final acid concentration of the method, the aluminum removal effect is good, and the hydrolysis of zinc can be avoided.
Further, the solid content of the weak base salt solution is 10-30 wt%. The inventor finds that if the solid content is too high, the reaction is violent and is not easy to control; if the solid content is too low, a large amount of water is brought in, and the volume expansion is large, so that the subsequent solid-liquid separation is not facilitated.
It should be noted that the specific type of the weak base salt is not particularly limited, and may be selected by those skilled in the art according to the need, for example, at least one of calcium carbonate, quicklime and basic zinc carbonate is included, and calcium carbonate and quicklime are preferable, because calcium carbonate and quicklime can react with aluminum-containing zinc sulfate solution to form CaSO 4 ·2H 2 O，CaSO 4 ·2H 2 O can further adsorb free Al in the system 3+ Thereby improving the effect of removing aluminum.
Further, before mixing the weak base salt solution and the aluminum-zinc sulfate-containing solution, the aluminum-zinc sulfate-containing solution is heated to 60-80 ℃. Therefore, the solid-liquid separation performance of the neutralized ore pulp after the weak base salt solution and the aluminum-containing zinc sulfate solution are mixed can be improved.
S200: mixing the filtrate containing aluminum colloid with flocculant solution
In this step, the filtrate containing the aluminum colloid is mixed with a flocculant solution. Specifically, the flocculant may aggregate the aluminum-containing colloid in the filtrate containing the aluminum-containing colloid, thereby causing the aggregate containing the aluminum-containing colloid to settle out of the filtrate.
Further, the volume ratio of the flocculant solution to the filtrate containing aluminum colloid is 1: (600-1500), wherein the concentration of the flocculant solution is 2-3 wt per mill. The inventor finds that if the concentration of the flocculating agent is too high, waste is caused, and solid-liquid separation is easy to cause difficulty; if the concentration of the flocculant is too low, the aluminum-containing colloid is insufficiently captured and agglomerated. Therefore, the flocculant concentration is favorable for achieving the best sedimentation effect and facilitating subsequent solid-liquid separation.
It should be noted that the specific type of the above-mentioned flocculating agent is not particularly limited, and may be selected by those skilled in the art as needed, for example, including at least one of polyacrylamide and bone glue.
S300: mixing the flocculated solution obtained in the step S200 with an adsorbent, and then carrying out solid-liquid separation
In this step, the flocculated liquid obtained in step S200 is mixed with an adsorbent and then subjected to solid-liquid separation. Specifically, the adsorbent adsorbs aluminum-containing colloid in the flocculated liquid, solid-liquid separation is performed after adsorption is finished, and aluminum enters slag, so that the effect of removing aluminum is achieved.
Further, the amount of the adsorbent added is 2 to 5g based on 1L of the flocculated solution. The inventors found that too high an amount of the adsorbent is wasted, and that too low an amount of the adsorbent is deteriorated. From this, adopt the adsorbent addition of this application can reach the best adsorption effect, and avoid the adsorbent extravagant.
It should be noted that the specific type of the above adsorbent is not particularly limited, and may be selected by those skilled in the art as needed, for example, including at least one of activated carbon and bone glue.
According to the method for removing aluminum in the aluminum-zinc sulfate-containing solution, the weak base salt solution is mixed with the aluminum-zinc sulfate-containing solution, wherein the weak base salt solution is used as a pH regulator to enable free Al in the aluminum-zinc sulfate-containing solution 3+ Converting into aluminum-containing colloid, and performing solid-liquid separation to obtain filtrate containing aluminum colloid; mixing the filtrate containing the aluminum colloid with a flocculant solution, wherein the flocculant can aggregate the aluminum colloid in the filtrate containing the aluminum colloid, so that the aggregate containing the aluminum colloid is settled from the filtrate; and finally, mixing the flocculated liquid obtained in the previous step with an adsorbent, adsorbing aluminum-containing colloid in the flocculated liquid by using the adsorbent, carrying out solid-liquid separation after adsorption is finished, and allowing aluminum to enter slag, thereby achieving the effect of removing aluminum. Therefore, the method can effectively solve the problems of poor ore pulp settleability and production interruption caused by high solid content of supernatant in the process of removing aluminum in the zinc hydrometallurgy solution by an iron oxide method in the prior art, ensures continuous and stable operation of production, obviously reduces the failure rate of concentration equipment, increases the economic benefit of enterprises, and has small loss of zinc in the solution and simultaneously ensures the effect of removing aluminum.
The invention will now be described with reference to specific examples, which are intended to be illustrative only and not to be limiting in any way.
Example 1
Preparing the required calcium carbonate ore pulp, wherein the solid content is 25 wt%; pumping the aluminum-zinc sulfate-containing solution into a reaction tank, and opening a steam valve to heat the aluminum-zinc sulfate-containing solution to 60 ℃; adding prepared calcium carbonate ore pulp, wherein the adding amount of the calcium carbonate ore pulp is based on the adjustment of the acidity of the aluminum-containing zinc sulfate solution to 35g/L, fully stirring, and performing liquid-solid separation through a filter press after the reaction is finished to obtain an aluminum-containing colloid filtrate with proper acidity, wherein the final acid concentration in the aluminum-containing colloid filtrate is 38 g/L; and then adding 2 wt% polyacrylamide solution, wherein the volume ratio of the polyacrylamide solution to the filtrate containing the aluminum colloid is 1: 900, stirring for reaction for 30 minutes, adding 5g/L of activated carbon, continuously stirring for 30 minutes, performing liquid-solid separation by a filter press, allowing aluminum to enter slag, reducing the aluminum content of the solution from 30g/L to 5-9 g/L, and preventing the aluminum-zinc sulfate-containing solution from causing ore pulp settling performance in each thickener after entering a zinc hydrometallurgy system.
Example 2
Preparing required quicklime pulp with solid content of 30 wt%; pumping the aluminum-zinc sulfate-containing solution into a reaction tank, and opening a steam valve to heat the aluminum-zinc sulfate-containing solution to 65 ℃; adding the prepared quicklime pulp, wherein the adding amount of the quicklime pulp is based on the adjustment of the acidity of the aluminum-zinc sulfate-containing solution to 45g/L, fully stirring, and performing liquid-solid separation through a filter press after the reaction is finished to obtain an aluminum-containing colloid filtrate with proper acidity, wherein the final acid concentration of the aluminum-containing colloid filtrate is 47 g/L; and adding 3 wt% of polyacrylamide solution, wherein the volume ratio of the polyacrylamide solution to the filtrate containing aluminum colloid is 1:1200, stirring for reaction for 30 minutes, adding activated carbon powder, the adding amount is 3g/L, continuously stirring for 30 minutes, performing liquid-solid separation through a filter press, allowing aluminum to enter slag, reducing the aluminum content of the solution from 28g/L to 3-5 g/L, and preventing ore pulp settling performance in each thickener after the aluminum-containing zinc sulfate solution enters a wet zinc smelting system.
Example 3
Preparing the required calcium carbonate ore pulp, wherein the solid content of the calcium carbonate ore pulp is 20 wt%; pumping the aluminum-zinc sulfate-containing solution into a reaction tank, and opening a steam valve to heat the aluminum-zinc sulfate-containing solution to 75 ℃; adding prepared calcium carbonate ore pulp, wherein the adding amount of the calcium carbonate ore pulp is based on the adjustment of the acidity of the aluminum-containing zinc sulfate solution to 25g/L, fully stirring, and performing liquid-solid separation through a filter press after the reaction is finished to obtain an aluminum-containing colloid filtrate with proper acidity, wherein the final acid concentration of the aluminum-containing colloid filtrate is 25 g/L; and adding 3 wt% of polyacrylamide solution, wherein the volume ratio of the polyacrylamide solution to the filtrate containing aluminum colloid is 1:1500, stirring for reaction for 30 minutes, adding activated carbon powder, the adding amount is 4g/L, continuously stirring for 30 minutes, performing liquid-solid separation through a filter press, allowing aluminum to enter slag, reducing the aluminum content of the solution from 32g/L to 2-3 g/L, and preventing ore pulp settling performance in each thickener after the aluminum-containing zinc sulfate solution enters a wet zinc smelting system.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The method for removing aluminum from the aluminum-containing zinc sulfate solution is characterized by comprising the following steps:
(1) mixing the weak base salt solution and the aluminum-containing zinc sulfate solution, and then carrying out solid-liquid separation to obtain a filtrate containing aluminum colloid;
(2) mixing the filtrate containing the aluminum colloid with a flocculant solution;
(3) and (3) mixing the flocculated liquid obtained in the step (2) with an adsorbent, and then carrying out solid-liquid separation.
2. The method of claim 1, wherein the aluminum-containing zinc sulfate solution is heated to 60-80 ℃ in advance before the weak base salt solution is mixed with the aluminum-containing zinc sulfate solution.
3. The method according to claim 1 or 2, wherein the weak base salt solution is added in step (1) in an amount to adjust the acidity of the aluminum-containing zinc sulfate solution to 25 to 50 g/L.
4. The process of claim 3, wherein in step (1), the weak base salt solution has a solid content of 10 to 30 wt%.
5. The method according to claim 3, wherein in the step (1), the final acid concentration in the filtrate containing aluminum colloid is 20-50 g/L.
6. The method of claim 3, wherein in step (1), the weak base salt comprises at least one of calcium carbonate, quicklime and basic zinc carbonate.
7. The method according to claim 1 or 2, wherein in step (2), the volume ratio of the flocculant solution to the filtrate containing aluminum colloids is 1: (600-1500).
8. The method as claimed in claim 6, wherein in the step (2), the concentration of the flocculant solution is 2-3 wt%.
9. The method of claim 6, wherein in step (2), the flocculant comprises at least one of polyacrylamide and bone glue.
10. The method according to claim 1 or 2, wherein in the step (3), the addition amount of the adsorbent is 2 to 5g based on 1L of the flocculated solution;
in the step (3), the adsorbent includes at least one of activated carbon and porous fiber particles.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111235407A (en) * | 2020-03-04 | 2020-06-05 | 济源市鲁泰纳米材料有限公司 | Method for purifying aluminum-containing secondary zinc oxide leaching solution and aluminum removal method |
| CN111235387A (en) * | 2020-01-14 | 2020-06-05 | 眉山顺应动力电池材料有限公司 | Method for removing aluminum ions from pickle liquor containing aluminum minerals |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111235387A (en) * | 2020-01-14 | 2020-06-05 | 眉山顺应动力电池材料有限公司 | Method for removing aluminum ions from pickle liquor containing aluminum minerals |
| CN111235407A (en) * | 2020-03-04 | 2020-06-05 | 济源市鲁泰纳米材料有限公司 | Method for purifying aluminum-containing secondary zinc oxide leaching solution and aluminum removal method |
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| Title |
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| 王亚: "湿法炼锌铝离子的脱除", 《冶金与材料》, vol. 41, no. 6, pages 127 - 128 * |
| 范跃: "《分析化学》", 31 January 2006, 中国计量出版社, pages: 227 * |
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