CN102153148B - Method for preparing iron oxide red - Google Patents
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- CN102153148B CN102153148B CN2011101159825A CN201110115982A CN102153148B CN 102153148 B CN102153148 B CN 102153148B CN 2011101159825 A CN2011101159825 A CN 2011101159825A CN 201110115982 A CN201110115982 A CN 201110115982A CN 102153148 B CN102153148 B CN 102153148B
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- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 39
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 98
- 229910052742 iron Inorganic materials 0.000 claims abstract description 68
- -1 iron ions Chemical class 0.000 claims abstract description 39
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 230000001590 oxidative effect Effects 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 16
- 239000000047 product Substances 0.000 claims description 16
- 238000005406 washing Methods 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 claims description 10
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
- 239000013078 crystal Substances 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 9
- 239000011701 zinc Substances 0.000 claims description 9
- 238000002386 leaching Methods 0.000 claims description 8
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 7
- 229910052725 zinc Inorganic materials 0.000 claims description 7
- 239000012065 filter cake Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 abstract description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 2
- 229910001447 ferric ion Inorganic materials 0.000 abstract 1
- 229910001448 ferrous ion Inorganic materials 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 12
- 238000001556 precipitation Methods 0.000 description 9
- 239000002893 slag Substances 0.000 description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 229910052598 goethite Inorganic materials 0.000 description 2
- AEIXRCIKZIZYPM-UHFFFAOYSA-M hydroxy(oxo)iron Chemical compound [O][Fe]O AEIXRCIKZIZYPM-UHFFFAOYSA-M 0.000 description 2
- 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 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 2
- 229910052935 jarosite Inorganic materials 0.000 description 2
- 239000011504 laterite Substances 0.000 description 2
- 229910001710 laterite Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- UIAIMGWRADQHKY-UHFFFAOYSA-N iron vanadium Chemical compound [Fe][V][Fe] UIAIMGWRADQHKY-UHFFFAOYSA-N 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Compounds Of Iron (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a method for preparing iron oxide red by utilizing a solution containing iron ions, wherein the iron ions are at least one kind of ferrous ions and ferric ions. The method comprises the following steps of: (1) adding the solution containing iron ions into a reactor; (2) adjusting the pH value of the solution to be 0.5-3.0; (3) adjusting the temperature in the reactor to be 180-220 DEG C, maintaining the temperature for a predetermined time at oxidizing atmosphere to obtain a solid-liquid mixture containing ferric oxides; and (4) carrying out solid liquid separation on the solid-liquid mixture to obtain an iron oxide red product. By utilizing the method, iron in the solution can be effectively recycled and the iron oxide red can be prepared.
Description
Technical Field
The invention relates to the field of chemical engineering, in particular to a method for preparing iron oxide red from a solution containing iron ions.
Background
At present, when zinc, nickel, cobalt or other valuable metals are produced by a wet method, an acid leaching process is generally adopted, and when the valuable metals are leached, iron in ores is also leached. The subsequent purification step includes iron removal, and the iron removal is usually carried out by jarosite or goethite in the industry, i.e. controlling the temperature of the leached liquid at a high level, introducing sodium/potassium/ammonium ions into the leached liquid, ionizing the iron into jarosite, or reducing ferric iron in the leached liquid into bivalent iron, and removing the iron in goethite under oxidation conditions. And filtering and washing the iron slag after iron removal, and then sending the iron slag into a tailing dam for stockpiling. The method has large amount of slag after iron removal, and the slag can not be recycled as resources at present, thereby not only occupying a large amount of land for piling, but also causing environmental pollution because harmful components are slowly dissolved out.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, it is an object of the present invention to propose a method for preparing iron red from a solution containing iron ions.
According to an embodiment of the present invention, there is provided a method of preparing iron red from a solution containing iron ions, wherein the iron ions are at least one selected from the group consisting of divalent iron ions and trivalent iron ions, the method including the steps of: (1) adding the solution containing iron ions to a reactor; (2) adjusting the pH of the solution to 0.5-3.0; (3) adjusting the temperature in the reactor to 180-220 ℃, and keeping the temperature in an oxidizing atmosphere for a predetermined time to obtain a solid-liquid mixture containing ferric oxide; (4) and carrying out solid-liquid separation on the solid-liquid mixture to obtain an iron oxide red product.
By means of the method for preparing iron oxide red according to the embodiment of the invention, iron oxide red can be efficiently prepared from a solution containing iron ions.
In addition, the method for preparing iron oxide red according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the invention, the pH of the solution is adjusted using at least one selected from the group consisting of potassium hydroxide, sodium hydroxide and aqueous ammonia.
According to one embodiment of the invention, said oxidizing atmosphere is achieved by feeding an oxygen-containing gas into said reactor.
According to one embodiment of the invention, the predetermined time is 0.5-2.5 hours.
According to one embodiment of the invention, a portion of the iron red product is returned to the reactor as seed crystals.
According to one embodiment of the invention, the solid-liquid separation of the solid-liquid mixture to obtain the iron oxide red product comprises: filtering the solid-liquid mixture to obtain a filter cake containing ferric oxide; and washing the filter cake, and drying to obtain the iron oxide red product. By using the method for preparing the iron oxide red, more than 90% of iron in the solution containing the iron ions can be recovered. The iron can be recovered to the maximum extent. In addition, the method for preparing iron oxide red according to the embodiment of the invention has universality and can be applied to various solutions containing iron ions, such as leachate in the metallurgical industry and the like. For leachate, the iron removal efficiency of the method provided by the embodiment of the invention is higher than that of the existing iron-vanadium iron removal method, the iron slag stacking problem can be effectively solved, conditions are created for slag-free production, and the environmental burden is reduced. The quality of the iron oxide red obtained by the method provided by the embodiment of the invention can be directly applied to various fields.
According to one embodiment of the invention, the washing is carried out in a weight ratio of liquid to solid of 3-5: 1.
According to one embodiment of the invention, the drying is performed at a temperature of 80-120 degrees celsius.
According to one embodiment of the invention, the pH of the solution is adjusted to 2.1-2.3.
According to one embodiment of the invention, the vessel is an autoclave, the pressure inside the autoclave is between 1.0 and 1.5MPa and the partial pressure of oxygen is between 0.1 and 0.5 MPa.
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 of preparing iron oxide red according to one embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Unless otherwise defined, terms used in the description and claims of the present invention have meanings well known to those skilled in the art. The terms "iron oxide red", "iron oxide", "red iron oxide", "ferric oxide" are used interchangeably herein.
According to an embodiment of the present invention, there is provided a method of preparing iron red from a solution containing iron ions. According to an embodiment of the present invention, in the solution, the valence state that iron assumes is not particularly limited, and the iron ion may be at least one selected from a divalent iron ion and a trivalent iron ion, that is, may be a single divalent iron ion, a single trivalent iron ion, or may be a combination of a divalent iron ion and a trivalent iron ion. According to an embodiment of the present invention, referring to fig. 1, the method for preparing iron oxide red from the above solution containing iron ions comprises the steps of:
s100: the solution containing iron ions is added to the reactor. According to the embodiment of the present invention, the source of the iron ion-containing solution as a raw material that can be used for preparing iron red is not particularly limited. According to an embodiment of the present invention, the solution containing iron ions is a leachate obtained from a nickel ore, a zinc ore, a cobalt ore, or the like, which is subjected to a wet leaching treatment. The person skilled in the art has surprisingly found that the method can be applied to leachate of the above-mentioned ores, and despite the low iron content and the complex composition of the leachate, by this treatment, the iron content of the leachate can be reduced, the purpose of purifying the leachate can be achieved, and at the same time, iron red can be recovered, the application value is increased, and the industrial cost is reduced. According to embodiments of the present invention, the type of container that can be used in the practice of the present invention is not particularly limited. According to an embodiment of the present invention, a reaction vessel capable of withstanding high temperature and high pressure may be employed. Therefore, high-flux, rapid and efficient reaction can be realized in the reaction kettle, and the efficiency of preparing the iron oxide red is improved.
S200: the pH of the solution is adjusted to 0.5-3.0, preferably 2.1-2.3. According to the embodiment of the present invention, the means for adjusting the pH is not particularly limited. According to an embodiment of the present invention, the pH of the solution is adjusted using at least one selected from the group consisting of potassium hydroxide, sodium hydroxide, and ammonia water. The applicant has found that these conditioning agents are suitable for solutions containing iron ions from various sources, in particular leachate solutions common in the metallurgical field. Is especially suitable for leaching solution in the wet production of zinc and nickel.
S300: adjusting the temperature in the reactor to 180-220 ℃, and keeping the temperature in an oxidizing atmosphere for a predetermined time to obtain a solid-liquid mixture containing ferric oxide; according to an embodiment of the invention, the oxidizing atmosphere is achieved by feeding an oxygen-containing gas into said reactor. The oxygen-containing gas described herein may be air. According to a specific example of the present invention, pure oxygen may be used, thereby improving reaction efficiency. According to an embodiment of the invention, the reaction vessel, e.g. the vessel in an autoclave, is between 1.0 and 1.5MPa and the partial pressure of oxygen is between 0.1 and 0.5 MPa. The applicant found that at this pressure, an efficient preparation of iron oxide red can be achieved. According to the embodiment of the present invention, the duration of the reaction, that is, the predetermined time is not particularly limited as long as iron oxide can be successfully produced, and according to the embodiment of the present invention, the predetermined time is 0.5 to 2.5 hours, whereby the oxidation reaction can be sufficiently performed to obtain iron oxide.
S400: and carrying out solid-liquid separation on the solid-liquid mixture to obtain an iron oxide red product. The method of performing solid-liquid separation according to the embodiment of the present invention is not particularly limited, and may be an apparatus and a method known to those skilled in the art. For example, according to an embodiment of the present invention, filtering the solid-liquid mixture to obtain a filter cake containing iron oxide; and washing the filter cake, and drying to obtain the iron oxide red product. The purity of the obtained iron oxide red can be further purified by filtration and washing. The iron oxide red obtained finally can be directly used as industrial raw materials in various industries and can be used in various fields such as metallurgy, coating, building materials and the like. According to the embodiment of the invention, when washing is carried out, the weight ratio of the washing liquid to the solid is 3-5: 1, so that the washing effect can be improved. According to the embodiment of the present invention, the washing liquid used for washing is not particularly limited, and may be water. The manner of drying is not particularly limited, and drying may be performed at a temperature of 80-120 degrees celsius, preferably drying, and drying of the iron oxide red product may be achieved cost-effectively. In addition, according to the embodiment of the invention, the obtained iron oxide red product can be returned to the reaction vessel to be used as a seed crystal, thereby improving the crystallization efficiency of the iron oxide red. The final iron oxide red has a crystal size of 0.5-1 μm. The amount of the iron red product returned to the reaction vessel as the seed crystal is not particularly limited and may be 1/8 to 1/2 times the mass of the obtained iron red product, that is, 2 to 8 times the circulating amount of the seed crystal.
The method according to the embodiment of the invention has at least one of the following advantages:
1. the method is universal, can be effectively butted with the main flow of extracting other valuable metals, and has simple process.
2. The iron recovery rate is higher than that of the existing method for removing iron from iron vitriol.
3. The obtained iron oxide red product has high quality and can be directly applied to various fields.
4. Solves the long-standing problem of iron slag stockpiling for zinc hydrometallurgy, nickel and other nonferrous metals, and creates conditions for slag-free production.
5. The iron oxide red product has high purity and low content of other components, can be effectively applied to the purification and deironing of the leaching solution of the ore, and improves the recovery rate of valuable metals.
The method of the present invention is described below by way of specific examples. These examples should not be construed as limiting the scope of the invention.
Example 1
Taking 1L of nickel laterite acid leaching solution, wherein the iron content is 42g/L (98% of the solution is ferric iron). Adjusting pH to 2.1 with NaOH, adding into autoclave, controlling temperature at 200 deg.C and oxygen partial pressure at 0.2MPa, filtering after reaction, slurrying with 3 times of water, washing, and drying at 100 deg.C.
Through analysis, the iron precipitation rate is 96.6 percent, the content of iron oxide red is more than 97 percent, and the Ni precipitation rate is less than 1.9 percent.
Example 2
Taking 1L of nickel laterite acid leaching solution, wherein the iron content is 42g/L (98% of the solution is ferric iron). Adjusting the pH value to 2.3 by NaOH, adding the mixture into an autoclave, controlling the temperature to 210 ℃, circulating seed crystals by 4 times and controlling the oxygen partial pressure to 0.2MPa, filtering after reaction, slurrying and washing by 3 times of water, and drying at 100 ℃.
Through analysis, the iron precipitation rate is 98.0 percent, the iron oxide red is more than 97 percent, and the Ni precipitation rate is less than 1.2 percent.
Example 3
Taking 1L of the zinc ore iron vitriol precipitation fore-liquor, wherein the iron content is 20g/L (98% of the iron is ferric iron). Adjusting pH to 2.0 with NaOH, adding into autoclave, controlling temperature at 190 deg.C, seed crystal circulation at 4 times, oxygen partial pressure at 0.2MPa, filtering after reaction, slurrying with 3 times of water, washing, and oven drying at 100 deg.C.
Through analysis, the iron precipitation rate is 95.4 percent, the iron oxide red is more than 95 percent, and the Zn precipitation rate is less than 1.4 percent.
Example 4
Taking 1L of zinc ore, carrying out high-pressure acid leaching, reducing by sulfur dioxide, adding the solution with the iron content of 40g/L (wherein 95 percent of the solution is ferrous iron) into a high-pressure kettle, controlling the temperature at 210 ℃, circulating seed crystals by 4 times and the oxygen partial pressure at 0.5MPa, filtering after reaction, slurrying and washing by using water of 3 times, and drying at 100 ℃.
Through analysis, the iron precipitation rate is 90%, the iron oxide red is more than 95%, and the Zn precipitation rate is less than 0.4%.
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 do not necessarily 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.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. A method for preparing iron oxide red from a solution containing iron ions, wherein the iron ions are at least one selected from the group consisting of divalent iron ions and trivalent iron ions, the method comprising the steps of:
(1) adding the solution containing iron ions to a reactor;
(2) adjusting the pH of the solution to 0.5-3.0;
(3) adjusting the temperature in the reactor to 180-220 ℃, and keeping the temperature in an oxidizing atmosphere for a predetermined time to obtain a solid-liquid mixture containing ferric oxide;
(4) carrying out solid-liquid separation on the solid-liquid mixture to obtain an iron oxide red product,
wherein,
the solution containing iron ions is leachate obtained in the process of wet leaching treatment of nickel ore, zinc ore or cobalt ore;
adjusting the pH of the solution using at least one selected from the group consisting of potassium hydroxide, sodium hydroxide, and aqueous ammonia;
the reactor is an autoclave, the pressure in the autoclave is 1.0-1.5MPa, and the partial pressure of oxygen is 0.1-0.5 MPa;
the oxidizing atmosphere is achieved by feeding an oxygen-containing gas into the reactor.
2. The method for preparing iron oxide red from a solution containing iron ions according to claim 1, wherein the predetermined time is 0.5-2.5 hours.
3. The method of producing iron red from a solution containing iron ions according to claim 1, characterized in that a portion of the iron red product is returned to the reactor as seed crystals.
4. The method for preparing iron oxide red from a solution containing iron ions according to claim 1, wherein the solid-liquid separation of the solid-liquid mixture to obtain the iron oxide red product comprises:
filtering the solid-liquid mixture to obtain a filter cake containing ferric oxide;
and washing the filter cake, and drying to obtain the iron oxide red product.
5. The process for the preparation of iron oxide red from a solution containing iron ions according to claim 4, wherein the washing is carried out with a weight ratio of liquid to solid of 3-5: 1.
6. The method for preparing iron oxide red from a solution containing iron ions according to claim 4, wherein the drying is performed at a temperature of 80-120 degrees Celsius.
7. The method for preparing iron oxide red from a solution containing iron ions according to claim 1, wherein the pH of the solution is adjusted to 2.1-2.3.
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| CN102603011A (en) * | 2012-02-29 | 2012-07-25 | 中国恩菲工程技术有限公司 | Method for preparing iron oxide red by utilizing valuable metal ferrous post-leaching solution of wet metallurgy |
| CN105694539B (en) * | 2016-02-29 | 2018-05-08 | 中国科学院兰州化学物理研究所 | A kind of method that iron oxide red hybrid pigment is prepared using clay mineral |
| CN106119539A (en) * | 2016-07-26 | 2016-11-16 | 中国恩菲工程技术有限公司 | The process technique of nickel-bearing laterite |
| CN113136488B (en) * | 2021-04-22 | 2022-10-18 | 中化化工科学技术研究总院有限公司 | Wet treatment process for iron vitriol slag in zinc hydrometallurgy |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1903735A (en) * | 2006-08-10 | 2007-01-31 | 攀枝花锐龙冶化材料开发有限公司 | Method of producing iron oxide red using ferrous sulphate |
| CN101077793A (en) * | 2007-05-25 | 2007-11-28 | 宫连春 | Method for preparing iron oxide red from red mud |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1903735A (en) * | 2006-08-10 | 2007-01-31 | 攀枝花锐龙冶化材料开发有限公司 | Method of producing iron oxide red using ferrous sulphate |
| CN101077793A (en) * | 2007-05-25 | 2007-11-28 | 宫连春 | Method for preparing iron oxide red from red mud |
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