CN102605186A - Method for producing manganese sulfate from manganese-rich slag through atmospheric pressure leaching - Google Patents
Method for producing manganese sulfate from manganese-rich slag through atmospheric pressure leaching Download PDFInfo
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- CN102605186A CN102605186A CN2012101183566A CN201210118356A CN102605186A CN 102605186 A CN102605186 A CN 102605186A CN 2012101183566 A CN2012101183566 A CN 2012101183566A CN 201210118356 A CN201210118356 A CN 201210118356A CN 102605186 A CN102605186 A CN 102605186A
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- manganese slag
- manganese
- manganous sulfate
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- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 title claims abstract 22
- 229910052748 manganese Inorganic materials 0.000 title claims abstract 22
- 239000011572 manganese Substances 0.000 title claims abstract 22
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 title claims abstract 20
- 239000002893 slag Substances 0.000 title claims abstract 20
- 238000004519 manufacturing process Methods 0.000 title claims abstract 17
- 229940099596 manganese sulfate Drugs 0.000 title claims abstract 6
- 235000007079 manganese sulphate Nutrition 0.000 title claims abstract 6
- 239000011702 manganese sulphate Substances 0.000 title claims abstract 6
- 238000002386 leaching Methods 0.000 title abstract 10
- 238000006243 chemical reaction Methods 0.000 claims abstract 7
- 238000000034 method Methods 0.000 claims abstract 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract 5
- 239000002253 acid Substances 0.000 claims abstract 5
- 239000011268 mixed slurry Substances 0.000 claims abstract 5
- 239000000203 mixture Substances 0.000 claims abstract 4
- 238000001914 filtration Methods 0.000 claims abstract 3
- 238000007599 discharging Methods 0.000 claims abstract 2
- 239000007788 liquid Substances 0.000 claims abstract 2
- 238000002156 mixing Methods 0.000 claims abstract 2
- 238000000926 separation method Methods 0.000 claims abstract 2
- 239000001117 sulphuric acid Substances 0.000 claims 3
- 235000011149 sulphuric acid Nutrition 0.000 claims 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims 2
- 239000002516 radical scavenger Substances 0.000 claims 2
- GSFSVEDCYBDIGW-UHFFFAOYSA-N 2-(1,3-benzothiazol-2-yl)-6-chlorophenol Chemical group OC1=C(Cl)C=CC=C1C1=NC2=CC=CC=C2S1 GSFSVEDCYBDIGW-UHFFFAOYSA-N 0.000 claims 1
- 239000000292 calcium oxide Substances 0.000 claims 1
- 235000012255 calcium oxide Nutrition 0.000 claims 1
- 238000000605 extraction Methods 0.000 claims 1
- 229910001385 heavy metal Inorganic materials 0.000 claims 1
- 150000002500 ions Chemical class 0.000 claims 1
- KNLQKHUBPCXPQD-UHFFFAOYSA-N manganese;sulfuric acid Chemical compound [Mn].OS(O)(=O)=O KNLQKHUBPCXPQD-UHFFFAOYSA-N 0.000 claims 1
- 239000002808 molecular sieve Substances 0.000 claims 1
- 238000006386 neutralization reaction Methods 0.000 claims 1
- 230000003472 neutralizing effect Effects 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 238000003828 vacuum filtration Methods 0.000 claims 1
- 238000005406 washing Methods 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000000741 silica gel Substances 0.000 abstract 1
- 229910002027 silica gel Inorganic materials 0.000 abstract 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Manufacture And Refinement Of Metals (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention discloses a method for producing manganese sulfate from manganese-rich slag through atmospheric pressure leaching. The method comprises the following steps of: a) carrying out size mixing on the manganese-rich slag by using a sulfuric acid solution to obtain mixed slurry; b) putting the mixed slurry into a reaction container; c) in the reaction process, controlling the pH value of the solution, discharging after atmospheric pressure acid leaching to obtain an acid leaching mixture; and d) carrying out solid-liquid separation on the obtained acid leaching mixture to obtain a manganese sulfate solution. According to the method for producing manganese sulfate from manganese-rich slag through atmospheric pressure leaching in the embodiment of the invention, the method of leaching by controlling pH value is adopted, so that the leaching rate of manganese is high, the problem that the filtering performance is influenced by a great deal of silica gel generated in the original leaching process can be solved, and the manganese can be selectively and efficiently dissolved out. In addition, the method for producing the manganese sulfate from the manganese-rich slag through atmospheric pressure leaching has the advantages of simple process flow, low material price and production cost, short processing time and environment-friendly natural environment.
Description
Technical field
The present invention relates to technical field of wet metallurgy, particularly the technical field of wet metallurgy of manganese.
Background technology
Rich manganese slag method is a kind of pyrogenic process beneficiation method; Its ultimate principle is selective reduction; I.e. carrying out property reduction in blast furnace or electric furnace, under elements such as guaranteeing iron, phosphorus fully reduced entering pig iron prerequisite, the high oxide with manganese was reduced to suboxide simultaneously; And suppress MnO further be reduced to manganese metal, thereby reach the enrichment of manganese.
Rich manganese slag derives from The ferroalloy industry usually, and its chemical ingredients mainly contains MnO, SiO
2, Al
2O
3, CaO, MgO, FeO, MnS etc.The mineralogical composition of rich manganese slag mainly is made up of tephroite, manganese rhodonite, manganese garnet and the vitreous etc., and under different smelting conditions, the mineralogical composition of formation is also different.
In the rich manganese slag manganese content minimum be 30.5wt%, be up to 50.8wt%, usually between 33～42wt%.Rich manganese slag mainly is intended for the raw material of producing manganese metal and manganese-silicon, as the batching of batching of producing electric furnace ferromanganese and medium-low carbon ferromanganese and production blast furnace ferromanganese.Also useful rich manganese slag is produced manganese salt such as Manganous chloride tetrahydrate.According to its character and composition, be suitable for producing silicomanganese most.At present, the smelting mode of rich manganese slag has: blast-furnace smelting, electrosmelting and normal pressure acidleach.But the rich manganese slag of blast furnace and electrosmelting process energy consumption is big in the prior art, and production operational availability is low, and the labor operation condition is poor, and labour productivity and security are low, have waste and environmental pollution problems.And existing normal pressure acid leaching process, the extraction yield that exists manganese is low, the quantity of slag is big, in the leaching process owing to generate a large amount of H
2SiO
3And H
3AlO
3The problems such as filtration difficulty that colloid causes.
Summary of the invention
The present invention is intended to one of solve the problems of the technologies described above at least.
For this reason; One object of the present invention is to propose the rich manganese slag normal pressure that a kind of flow process is simple, supplies consumption is few, production cost is low, the treatment time is short, the manganese leaching yield is high and leaches the method for producing manganous sulfate; This method can solve the pollution problem of rich in the past manganese slag technology to environment; Solved the influence to strainability of a large amount of silica gel of generating in the leaching process in the past, made manganese resource in the rich manganese slag obtain the utilization of economical rationality, the manganese ore that improves dilution day by day produces resource utilization.
Rich manganese slag normal pressure according to the embodiment of the invention leaches the method for producing manganous sulfate, may further comprise the steps: a) said rich manganese slag is sized mixing with sulphuric acid soln, obtain mixed slurry; B) said mixed slurry is added in the reaction vessel; C) the pH value of control solution in reaction process, and discharging after the normal pressure acidleach obtains acidleach and goes out mixture; And d) said acidleach is gone out mixture and carry out solid-liquid separation, obtain manganese sulfate solution.
Rich manganese slag normal pressure according to the embodiment of the invention leaches the method for producing manganous sulfate, because the method that adopts control pH value to leach, the leaching yield of manganese is high, has realized the stripping of manganese selectivity efficient.In addition, it is simple that the method that manganous sulfate is produced in this richness manganese slag normal pressure leaching has technical process, the material low price, and production cost is low, and the treatment time is short, the advantage friendly to physical environment.
In addition, the method for rich manganese slag normal pressure leaching production manganous sulfate according to the above embodiment of the present invention can also have following additional technical characterictic:
Wherein, improve the leaching yield of manganese in the rich manganese slag and accelerate leaching velocity, in the said step a), the granularity of said rich manganese slag is controlled at below 100 orders.Advantageously, in the said step b), the liquid-solid ratio in the said mixed slurry is 3: 1～16: 1.
Wherein, in order further to improve the speed of response that normal pressure leaches, in said step c), the temperature in the said reaction vessel is controlled at 50 ℃～98 ℃.
Advantageously, in the said step c), the pH value of said solution is controlled at 1～6.
Advantageously, acid is 30%～98% sulphuric acid soln in the said step c), keeps the interior acidity of reaction vessel at 10～200g/L.
Consider the balance of production cost and leaching yield, in the said step d), the extraction time of said normal pressure acidleach is 60～120min.
According to some embodiments of the present invention, in order to improve the purity of manganese sulfate solution, may further comprise the steps in the said step d): d-1) add rich manganese slag and quicklime in the slip after going out reaction vessel, making its pH value is in 6.5～7 scopes so that neutralization acid wherein; And d-2) slip after neutralizing treatment once filters, washs, and obtains manganous sulfate filtrating and leached mud.
Wherein, can be with the raw material of said leached mud as the preparation molecular sieve.
In addition, in order to improve the quality of manganous sulfate filtrating, step d) further comprises: d-3) in said manganous sulfate filtrating, add scavenging agent with after removing heavy metal ion wherein, carry out secondary filtration, washing, obtain the high-purity sulphuric acid manganese solution.Said scavenging agent can be Sodium Dimethyldithiocarbamate ((CH
3)
2NCS
2Na), be called for short SDD).
Wherein, in order to improve filtration velocity, can adopt vacuum filtration method or filter press technique.
Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, or recognize through practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage obviously with are easily understood becoming the description of embodiment from combining figs, wherein:
Fig. 1 is the process flow sheet that leaches the method for producing manganous sulfate according to the rich manganese slag normal pressure of the embodiment of the invention.
Embodiment
Describe embodiments of the invention below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the present invention, and can not be interpreted as limitation of the present invention.
The rich manganese slag normal pressure that is described with reference to the drawings below according to the embodiment of the invention leaches the method for producing manganous sulfate.
As shown in the figure, the method for producing manganous sulfate according to the rich manganese slag normal pressure leaching of the embodiment of the invention may further comprise the steps.
A) said rich manganese slag is sized mixing with sulphuric acid soln, obtain mixed slurry.
Because the leaching raw material of present method is rich manganese slag, considers that rich manganese mud is resulting via method of reducing, manganese nearly all exists with the form of bivalent manganese, needn't consider the reduction problem so normal pressure leaches in the process that rich manganese slag prepares manganous sulfate.
The leaching agent that is adopted is a sulfuric acid, and the purpose of leaching is to make the manganese in the rich manganese slag obtain higher leaching yield as far as possible, and from slag, being dissolved out becomes water miscible manganous sulfate.
Consider that from viewpoints such as cost and speed of response the granularity of said rich manganese slag is controlled at below 100 orders.
Said sulphuric acid soln does not have particular restriction, but from leaching efficiency, to viewpoints such as the corrosion consideration of reaction vessel, the initial acidity of preferred said sulphuric acid soln is 1g/L～100g/L.In addition, can set according to the content of effective constituent separately about the ratio of rich manganese slag and sulphuric acid soln.Liquid-solid ratio in the said mixed slurry is 3: 1～16: 1.
B) said mixed slurry is added in the reaction vessel.
Temperature in the said reaction vessel is controlled at 50 ℃～98 ℃.
C) the pH value of control solution in reaction process, and discharging after the normal pressure acidleach obtains acidleach and goes out mixture.
Time about the normal pressure acidleach can and combine leaching efficiency, cost suitably to regulate according to conditions such as raw material, temperature, and for example, the extraction time of said normal pressure acidleach can be controlled at 60～120min.
In the acidleach process, reactions mainly takes place:
MnO+H
2SO
4→MnSO
4+H
2O (1)
Al
2O
3(amorphous)+H
2SO
4→ Al
2(SO
4)
3+ H+H
2O (2)
MnSiO
3+H
2SO
4→MnSO
4+H
2SiO
3+H2O (3)
Mn(AlO
2)
2+H
2SO
4→MnSO
4+H
3AlO
3+H2O (4)
Fe+H
2SO
4→FeSO
4+H
2↑ (5)
FeO+H
2SO
4→FeSO
4+H
2O (6)
FeS+H
2SO
4→FeSO
4+H
2S↑ (7)
CaO+H
2SO
4→CaSO
4+H
2O (8)
Can know that by above-mentioned reaction formula after acidleach went out through normal pressure, the manganese in the rich manganese slag was converted into water miscible manganous sulfate and is dissolved in the leach liquor, and impurity such as Fe, Si, Al are cured into slag, thereby can realize the high efficiency separation of Mn and impurity such as Fe, Si.
D) said acidleach is gone out mixture and carry out solid-liquid separation, obtain manganese sulfate solution.
The concrete solid-liquid separating method that is adopted comprises filtration, sedimentation etc.Wherein, from considerations such as raising filtration velocity, can adopt vacuum filtration or press filtration.
In examples more of the present invention, in order to improve the purity of gained manganese sulfate solution, this step specifically can may further comprise the steps:
D-1) add rich manganese slag and quicklime in the slip after going out reaction vessel to make its pH value be in 6.5～7 scopes so that neutralize wherein acid.
In the acidleach process, in order to improve leaching efficiency, total acid content is far above the acid of chemical theory amount; Therefore also remaining in the slip after the acidleach have a certain amount of acid; For this reason, in following examples of the present invention, through adding rich manganese slag and the quicklime spent acid wherein that neutralizes.Mainly utilize the wherein most acid that neutralizes of rich manganese slag, and utilize in the quicklime and remaining small amount of acid.In the time of in pH value of slurry is 6.5～7 scopes, can think that spent acid is wherein neutralized by the overwhelming majority.
Can wait aptly according to the manganese content in employed vitriolic acidity in the acidleach process, liquid-solid ratio and the rich manganese slag about the concrete amount of rich manganese slag and quicklime and set.
D-2) slip after neutralizing treatment once filters, washs, and obtains manganous sulfate filtrating and leached mud.
Wherein, because leached mud contains SiO
2And Al
2O
3More, can be with the raw material of said leached mud as the preparation molecular sieve.
In addition, in order further to improve the quality of manganous sulfate filtrating, can further include following steps:
D-3) in said manganous sulfate filtrating, add scavenging agent, carry out secondary filtration, washing, obtain the high-purity sulphuric acid manganese solution with after removing heavy metal ion wherein.
Wherein, said scavenging agent can adopt Sodium Dimethyldithiocarbamate (SDD).
Leach the method for producing manganese sulfate below by specific embodiment explanation rich manganese slag normal pressure according to the present invention.
Embodiment one:
Rich manganese slag ore deposit is finely ground to the breeze of mean particle size below 100 orders, gets 100g; Use and initially contain acid concentration and size mixing liquid-solid ratio 6: 1 as the sulphuric acid soln of 80g/L; Slip after sizing mixing adds in the reaction vessel, and controlled temperature is at 80 ℃; The pH value of control solution is in certain scope in leaching process, and the reaction times is discharging behind 120min; Add a small amount of rich manganese slag in the slip after leaching, neutralize most spent acid, add again among the proper C aO and remaining a small amount of spent acid, until the pH value between 6.5 to 7; Filter washing then; The leached mud that obtains behind the filtration washing is as the raw material of sub products such as preparation molecular sieve; After first-time filtrate added scavenging agent SDD degree of depth removing heavy metals ion, carry out secondary filtration, washing; At last, the manganese sulfate solution that obtains is sent to the potroom preparing electrolyte.
Embodiment two:
Rich manganese slag ore deposit is finely ground to the breeze of mean particle size below 100 orders, gets 100g; Use and initially contain acid concentration and size mixing liquid-solid ratio 8: 1 as the sulphuric acid soln of 50g/L; Slip after sizing mixing adds in the reaction vessel, and controlled temperature is at 95 ℃; The pH value of control solution is in certain scope in leaching process, and the reaction times is discharging behind 90min; Add a small amount of rich manganese slag in the slip after leaching, neutralize most spent acid, add among the proper C aO again and remaining a small amount of spent acid, regulate the pH value between 6.5 to 7; Filter washing then; The leached mud that obtains behind the filtration washing is as the raw material of sub products such as preparation molecular sieve; After first-time filtrate added scavenging agent SDD degree of depth removing heavy metals ion, carry out secondary filtration, washing; At last, the manganese sulfate solution that obtains is sent to the potroom preparing electrolyte.
Embodiment three:
Rich manganese slag ore deposit is finely ground to the breeze of mean particle size below 100 orders, gets 100g; Use and initially contain acid concentration and size mixing liquid-solid ratio 15: 1 as the sulphuric acid soln of 30/L; Slip after sizing mixing adds in the reaction vessel, and controlled temperature is at 60 ℃; The pH value of control solution is in certain scope in leaching process, and the reaction times is discharging behind 60min; Add a small amount of rich manganese slag in the slip after leaching, neutralize most spent acid, add among the proper C aO again and remaining a small amount of spent acid, regulate the pH value between 6.5 to 7; Filter washing then; The leached mud that obtains behind the filtration washing is as the raw material of sub products such as preparation molecular sieve; After first-time filtrate added scavenging agent SDD degree of depth removing heavy metals ion, carry out secondary filtration, washing; At last, the manganese sulfate solution that obtains is sent to the potroom preparing electrolyte.
Embodiment four:
Rich manganese slag ore deposit is finely ground to the breeze of mean particle size below 100 orders, gets 100g; Use and initially contain acid concentration and size mixing liquid-solid ratio 5: 1 as the sulphuric acid soln of 10g/L; Slip after sizing mixing adds in the reaction vessel, and controlled temperature is at 85 ℃; The pH value of control solution is in certain scope in leaching process, and the reaction times is discharging behind 120min; Add a small amount of rich manganese slag in the slip after leaching, neutralize most spent acid, add among the proper C aO again and remaining a small amount of spent acid, regulate the pH value between 6.5 to 7; Filter washing then; The leached mud that obtains behind the filtration washing is as the raw material of sub products such as preparation molecular sieve; After first-time filtrate added scavenging agent SDD degree of depth removing heavy metals ion, carry out secondary filtration, washing; At last, the manganese sulfate solution that obtains is sent to the potroom preparing electrolyte.
Estimate for rich manganese slag normal pressure of the present invention is leached the method effect of producing manganous sulfate, resulting manganese sulfate solution of above-mentioned each embodiment and leached mud have been carried out following analysis, analytical results is as shown in table 1.
Manganese leaching yield=(1-C
1M
1/ M) * 100%
Wherein: M---manganese element total mass in the raw material; The g of unit;
C
1---the quality percentage composition of manganese element in the filter residue, the wt% of unit;
M
1---the quality of filter residue, the g of unit;
Slag rate=(M
1/ M
0) * 100%
Wherein: M
0---raw material ore deposit total mass; The g of unit;
M
1---the quality of filter residue, the g of unit;
Contain manganese=C in the leached mud
1M
1
Wherein: C
1---the quality percentage composition of manganese element in the filter residue, the wt% of unit;
M
1---the quality of filter residue, the g of unit;
Table 1
Can find out by table 1; Adopt method of the present invention that rich manganese slag is carried out normal pressure and leach, the leaching yield of manganese preferably can reach more than 91%, and the leaching yield of manganese is high; Realized the selectivity efficient stripping of Mn, laid a good foundation for the clean and effective of various valuable elements in the rich manganese slag of final realization reclaims.In addition, it is simple that the method that manganous sulfate is produced in this richness manganese slag normal pressure leaching has technical process, the material low price, and production cost is low, and the treatment time is short, the advantage friendly to physical environment.
In the description of this specification sheets, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means the concrete characteristic, structure, material or the characteristics that combine this embodiment or example to describe and is contained at least one embodiment of the present invention or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete characteristic, structure, material or the characteristics of description can combine with suitable manner in any one or more embodiment or example.
Although illustrated and described embodiments of the invention; Those having ordinary skill in the art will appreciate that: under the situation that does not break away from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited claim and equivalent thereof.
Claims (12)
1. a rich manganese slag normal pressure leaches the method for producing manganous sulfate, it is characterized in that, may further comprise the steps:
A) said rich manganese slag is sized mixing with sulphuric acid soln, obtain mixed slurry;
B) said mixed slurry is added in the reaction vessel;
C), the pH value of control solution in reaction process, and discharging after the normal pressure acidleach obtain acidleach and go out mixture; With
D) said acidleach is gone out mixture and carry out solid-liquid separation, obtain manganese sulfate solution.
2. rich manganese slag normal pressure according to claim 1 leaches the method for producing manganous sulfate, it is characterized in that in the said step a), the granularity of said rich manganese slag is controlled at below 100 orders.
3. rich manganese slag normal pressure according to claim 1 leaches the method for producing manganous sulfate, it is characterized in that in the said step a), the acidity of said sulphuric acid soln is 1g/L～100g/L, the liquid-solid ratio in the said mixed slurry 3: 1～16: 1.
4. rich manganese slag normal pressure according to claim 1 leaches the method for producing manganous sulfate, it is characterized in that, in said step b), the temperature in the said reaction vessel is controlled at 50 ℃～98 ℃.
5. rich manganese slag normal pressure according to claim 1 leaches the method for producing manganous sulfate, it is characterized in that in the said step c), the pH value of solution value is controlled at 1～6.
6. rich manganese slag normal pressure according to claim 1 leaches the method for producing manganous sulfate, it is characterized in that acid is 30%～98% sulphuric acid soln in the said step c), keeps the interior acidity of reaction vessel at 10～200g/L.
7. rich manganese slag normal pressure according to claim 1 leaches the method for producing manganous sulfate, it is characterized in that in the said step c), the extraction time of said normal pressure acidleach is 60～120min.
8. rich manganese slag normal pressure according to claim 1 leaches the method for producing manganous sulfate, it is characterized in that, may further comprise the steps in the said step d):
D-1) add rich manganese slag and quicklime in the slip after going out reaction vessel, making its pH value is in 6.5～7 scopes so that neutralization acid wherein; With
D-2) slip after neutralizing treatment once filters, washs, and obtains manganous sulfate filtrating and leached mud.
9. rich manganese slag normal pressure according to claim 8 leaches the method for producing manganous sulfate, it is characterized in that, with the raw material of said leached mud as the preparation molecular sieve.
10. rich manganese slag normal pressure according to claim 8 leaches the method for producing manganous sulfate, it is characterized in that said step d) further comprises:
D-3) in said manganous sulfate filtrating, add scavenging agent, carry out secondary filtration, washing, obtain the high-purity sulphuric acid manganese solution with after removing heavy metal ion wherein.
11. rich manganese slag normal pressure according to claim 10 leaches the method for producing manganous sulfate, it is characterized in that said scavenging agent is a Sodium Dimethyldithiocarbamate.
12. each described rich manganese slag normal pressure leaches the method for producing manganous sulfate according to Claim 8～11, it is characterized in that vacuum filtration method or filter press technique are adopted in said filtration.
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| CN2012101183566A CN102605186A (en) | 2011-10-10 | 2012-04-20 | Method for producing manganese sulfate from manganese-rich slag through atmospheric pressure leaching |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110305135.5 | 2011-10-10 | ||
| CN201110306177 | 2011-10-10 | ||
| CN2011103051355A CN102367515A (en) | 2011-10-10 | 2011-10-10 | Pressurizing and reductive leaching method of pyrolusite powder |
| CN2011103050757A CN102367521A (en) | 2011-10-10 | 2011-10-10 | Method for leaching of manganese from manganese-containing smelt flue dust |
| CN201110305075.7 | 2011-10-10 | ||
| CN201110305124 | 2011-10-10 | ||
| CN201110305124.7 | 2011-10-10 | ||
| CN201110306177.0 | 2011-10-10 | ||
| CN2012101183566A CN102605186A (en) | 2011-10-10 | 2012-04-20 | Method for producing manganese sulfate from manganese-rich slag through atmospheric pressure leaching |
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| CN201210118398XA Pending CN102605188A (en) | 2011-10-10 | 2012-04-20 | Method for producing manganese sulfate by manganese alloy slag through pressure leaching |
| CN2012101184287A Pending CN102618728A (en) | 2011-10-10 | 2012-04-20 | Method for producing manganese sulfate by leaching manganese alloy slag under normal pressure |
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| CN201210118398XA Pending CN102605188A (en) | 2011-10-10 | 2012-04-20 | Method for producing manganese sulfate by manganese alloy slag through pressure leaching |
| CN2012101184287A Pending CN102618728A (en) | 2011-10-10 | 2012-04-20 | Method for producing manganese sulfate by leaching manganese alloy slag under normal pressure |
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| CN102605188A (en) | 2012-07-25 |
| CN102605187A (en) | 2012-07-25 |
| CN102618728A (en) | 2012-08-01 |
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