CN103757252A - Method for leaching pyrolusite - Google Patents
Method for leaching pyrolusite Download PDFInfo
- Publication number
- CN103757252A CN103757252A CN201310736473.3A CN201310736473A CN103757252A CN 103757252 A CN103757252 A CN 103757252A CN 201310736473 A CN201310736473 A CN 201310736473A CN 103757252 A CN103757252 A CN 103757252A
- Authority
- CN
- China
- Prior art keywords
- pyrolusite
- leaching
- add
- manganese
- sulfuric acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- Inorganic Compounds Of Heavy Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for leaching pyrolusite. The method comprises the steps of adding pyrolusite powder into a reaction kettle which is resistant to pressure and the corrosion of sulfuric acid, adding a sulfuric acid solution and sodium sulfite, and leaching under closed conditions.
Description
Technical field
The present invention relates to a kind of leaching method of pyrolusite.
Background technology
Pyrolusite is the important source material of producing the materials such as manganese metal, manganous sulfate, Manganse Dioxide, manganous nitrate.Wet processing is the main technique of producing above-mentioned materials, leaches the operation operation that is absolutely necessary in this technique.In producing the wet processing of manganese metal, manganous sulfate, Manganse Dioxide, substantially adopt sulfuric acid leaching system.Due to the MnO in pyrolusite
2be insoluble to sulfuric acid, need to be by reducing roasting by MnO
2be converted into MnO ability sulfuric acid leaching, but the transformation efficiency of roasting only has 85% left and right, while causing the pyrolusite of sulfuric acid leaching reducing roasting, the leaching yield of metal target manganese is not high, causes the wasting of resources.Although add Fe in Leaching Systems
2+deng reductive agent, can directly leach pyrolusite with sulfuric acid, but add Fe
2+can increase the weight of the burden that subsequent solution purifies.High, the leaching velocity of exploitation leaching yield soon, the direct leaching method that substantially do not increase the pyrolusite of subsequent process burden has larger practical value.
Summary of the invention
The problem leaching for current pyrolusite, the object of the invention is to find that a kind of leaching yield is high, leaching velocity is fast, energy consumption is low, substantially do not increase the leaching method of the pyrolusite of subsequent process burden, it is characterized in that granularity≤180 object pyrolusite powder to add in the reactor of withstand voltage, sulfuric acid corrosion resistant, add sulphuric acid soln and S-WAT, and leach in confined conditions.After leaching finishes, the slurry of emitting in reactor carries out solid-liquid separation, obtains required infusion solution.The starting point concentration of the sulphuric acid soln of leaching process is 1mol/L～4mol/L.The add-on of sulfuric acid is that in pyrolusite, whole manganese leaches 105%～115% of required theoretical amount.The add-on of S-WAT is for being reduced to 103%～110% of the required theoretical amount of valency manganese by whole tetravalence manganese in pyrolusite.The temperature of whole leaching process is 50 ℃～90 ℃, and stirring velocity is 50 r/min～130 r/min.Extraction time is 3h～5h.
The object of the present invention is achieved like this: airtight and (Na)
2sO
3under the condition existing, mainly there is following chemical reaction in sulfuric acid leaching pyrolusite:
MnO
2?+?(Na)
2SO
3?+?H
2SO
4?=?MnSO
4?+?(Na)
2SO
4?+?H
2O
Fe
2O
3?+?(Na)
2SO
3?+?2H
2SO
4?=?2FeSO
4?+?(Na)
2SO
4?+?2H
2O
2FeSO
4?+?MnO
2?+?2H
2SO
4?=?Fe
2(SO
4)
3?+?MnSO
4?+?2H
2O
Fe
2(SO
4)
3?+?3H
2O?=?Fe
2O
3?+?3H
2SO
4
Due to (Na)
2sO
3reductibility stronger, MnO
2oxidisability also stronger, both are easy to occur chemical reaction, realize thus MnO
2leach more completely.Due to Fe
3+hydrolysis pH value more much lower than the pH value of Mn2+ hydrolysis, enter the Fe of solution
2+will be by MnO
2be oxidized to Fe
3+, and then there is hydrolysis reaction, therefore, as long as control the consumption of sulfuric acid well, just can restrain the leaching of Fe, can not bring large difficulty to follow-up scavenging process.(Na)
2sO
3the SO decompositing under acidic conditions
2by stirring, enter solution (SO
2in solution, have certain solubleness) and MO
2reaction is consumed, and whole system is carried out under pressure-fired.
Outstanding advantages of the present invention is: through above-mentioned series reaction, finally make the Mn in pyrolusite substantially leach completely, improved the leaching yield of Mn, reduce the wasting of resources, also to subsequent solution, do not purify and bring difficulty; Whole leaching process is thermopositive reaction, and energy consumption is low; Due to (Na)
2sO
3be easy to and MnO
2reaction, so reduction leaching process speed is fast, process is carried out in confined conditions, has avoided SO
2the environmental pollution that produces of effusion.
specific implementation method
embodiment 1: 1000g pyrolusite powder (is contained to manganese 55.5%, Fe
2o
36.7%, particle diameter 180 orders) adding volume is in the lining titanium pressure reaction still of 20L, and adding starting point concentration is 1mol/L sulphuric acid soln 11L, adds (Na)
2sO
31304g, at 60 ℃～70 ℃, 3h is leached in airtight stirring (stirring velocity 80r/min).According to the assay result of the leached mud after cleaning, the leaching yield of manganese is 98.9%.
Embodiment 2: 10kg pyrolusite powder (is contained to manganese 55.5%, Fe
2o
36.7%, particle diameter 180 orders) adding volume is in the lining titanium pressure reaction still of 50L, and adding starting point concentration is 3mol/L sulphuric acid soln 38L, adds (Na)
2sO
313kg, at 70 ℃～80 ℃, 4h is leached in airtight stirring (stirring velocity 70r/min).According to the assay result of the leached mud after cleaning, the leaching yield of manganese is 99.1%.
Claims (1)
1. the leaching method of a pyrolusite, it is characterized in that object pyrolusite ore deposit, granularity≤180 to add withstand voltage, in the reactor of sulfuric acid corrosion resistant, add sulphuric acid soln and S-WAT, and leach in confined conditions, after leaching finishes, the slurry of emitting in reactor carries out solid-liquid separation, obtain required infusion solution, the starting point concentration of the sulphuric acid soln of leaching process is 1mol/L～4mol/L, the add-on of sulfuric acid is that in pyrolusite, whole manganese leaches 105%～115% of required theoretical amount, the add-on of S-WAT is for being reduced to 103%～110% of the required theoretical amount of valency manganese by whole tetravalence manganese in pyrolusite, the temperature of whole leaching process is 50 ℃～90 ℃, stirring velocity is 50 r/min～130 r/min, extraction time is 3h～5h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310736473.3A CN103757252A (en) | 2013-12-29 | 2013-12-29 | Method for leaching pyrolusite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310736473.3A CN103757252A (en) | 2013-12-29 | 2013-12-29 | Method for leaching pyrolusite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103757252A true CN103757252A (en) | 2014-04-30 |
Family
ID=50524566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310736473.3A Pending CN103757252A (en) | 2013-12-29 | 2013-12-29 | Method for leaching pyrolusite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103757252A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113528814A (en) * | 2021-06-18 | 2021-10-22 | 武汉理工大学 | Method for reducing and leaching manganese in manganese oxide ore by two-stage mechanical force ball milling |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1382813A (en) * | 2002-03-12 | 2002-12-04 | 四川川投峨眉铁合金（集团）有限责任公司 | Fully wet technology for extracting Mg from Mg contained dust |
| CN101956069A (en) * | 2010-09-15 | 2011-01-26 | 长沙达华污泥处理科技有限公司 | Method for reducing and leaching manganese from pyrolusite in sulfuric acid solution by using sludge |
-
2013
- 2013-12-29 CN CN201310736473.3A patent/CN103757252A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1382813A (en) * | 2002-03-12 | 2002-12-04 | 四川川投峨眉铁合金（集团）有限责任公司 | Fully wet technology for extracting Mg from Mg contained dust |
| CN101956069A (en) * | 2010-09-15 | 2011-01-26 | 长沙达华污泥处理科技有限公司 | Method for reducing and leaching manganese from pyrolusite in sulfuric acid solution by using sludge |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113528814A (en) * | 2021-06-18 | 2021-10-22 | 武汉理工大学 | Method for reducing and leaching manganese in manganese oxide ore by two-stage mechanical force ball milling |
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Application publication date: 20140430 |