CN103757250A - Method for leaching pyrolusite - Google Patents
Method for leaching pyrolusite Download PDFInfo
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- CN103757250A CN103757250A CN201310736454.0A CN201310736454A CN103757250A CN 103757250 A CN103757250 A CN 103757250A CN 201310736454 A CN201310736454 A CN 201310736454A CN 103757250 A CN103757250 A CN 103757250A
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- CN
- China
- Prior art keywords
- leaching
- sulfuric acid
- pyrolusite
- organic wastewater
- add
- 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.)
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- Manufacture And Refinement Of Metals (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a method for leaching pyrolusite. The method comprises the steps of adding pyrolusite powder with the particle size being not greater than 180 meshes, high-concentration organic wastewater which does not contain benzene-ring substances, and sulfuric acid into a reaction kettle which is resistant to the corrosion of sulfuric acid, and leaching while stirring.
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 FeS in Leaching Systems
2deng reductive agent, can directly leach pyrolusite with sulfuric acid, but leaching velocity is slow, extraction temperature is high, and leaching yield is lower.Exploitation leaching yield direct leaching method high, the fast pyrolusite of leaching velocity has larger practical value.
Summary of the invention
The problem leaching for current pyrolusite, the object of the invention is to find the direct leaching method of pyrolusite that a kind of leaching yield is high, leaching velocity is fast, energy consumption is low, it is characterized in that, by≤180 order pyrolusite powders, containing in the high concentrated organic wastewater of benzene ring substance and reactor that sulfuric acid adds sulfuric acid corrosion resistant, carrying out agitation leach.After leaching finishes, the slurry of emitting in reactor carries out solid-liquid separation, obtains required infusion solution.For the sulfuric acid starting point concentration that leaches, be 1mol/L～4mol/L, for the COD of the high concentrated organic wastewater that leaches
crconcentration>=30000mg/L.The add-on of sulfuric acid is by 103%～110% of the theoretical amount that in pyrolusite, all manganese leaches.The add-on of high concentrated organic wastewater is with per kilogram MnO
2add COD
cr0.20 kilogram～0.25 kilogram calculating adds.The temperature of whole leaching process is 80 ℃～95 ℃, and stirring velocity is 50 r/min～130 r/min.Extraction time is 2h～4h.
The object of the present invention is achieved like this: under the condition existing at high concentrated organic wastewater, the redox reaction of sulfuric acid leaching pyrolusite can represent with general formula below:
(C-H
xO
y)
m?+?2mMnO
2?+?2mH
+?=?2mMn
2+?+?mCO
2?+?zH
2O
Containing the organism in the high concentrated organic wastewater of benzene ring substance, do not there is stronger reducing power, and be dissolved state, be easy to contact and react with pyrolusite, realize MnO
2leach more completely.
Outstanding advantages of the present invention is: through above-mentioned reaction, finally make the Mn in pyrolusite substantially leach completely, improved the leaching yield of Mn, reduce the wasting of resources; Utilize high concentrated organic wastewater to make oxygenant, not only for the improvement of high concentrated organic wastewater opens up a new way, and can reduce the leaching cost of pyrolusite, there is obvious economic benefit and environmental benefit.
specific implementation method
embodiment 1: 1000g pyrolusite powder (is contained to manganese 55.5%, Fe
2o
36.7%, particle diameter 180 orders) and 3.52L brewing wastewater (containing COD
cr50000mg/L) with the sulfuric acid concentration of sulfuric acid preparation be 1mol/L solution 6600ml to add volume be in the stainless steel cauldron of 10L, at 80 ℃～85 ℃, stir (stirring velocity 70r/min) and leach 4h.According to the assay result of the leached mud after cleaning, the leaching yield of manganese is 99.2%.
Embodiment 2: 10kg pyrolusite powder (is contained to manganese 55.5%, Fe
2o
36.7%, particle diameter 180 orders) and the concentrated waste water of 18L Starch Production (containing COD
cr120000mg/L) with the sulfuric acid concentration of sulfuric acid preparation be 3mol/L solution 23L to add volume be in the enamel reaction still of 50L, at 85 ℃～90 ℃, stir (stirring velocity 60r/min) and leach 2h.According to the assay result of the leached mud after cleaning, the leaching yield of manganese is 99.5%.
Claims (1)
1. the leaching method of a pyrolusite, it is characterized in that by≤180 order pyrolusite powders, containing in the high concentrated organic wastewater of benzene ring substance and reactor that sulfuric acid adds sulfuric acid corrosion resistant, carry out agitation leach, after leaching finishes, the slurry of emitting in reactor carries out solid-liquid separation, obtaining required infusion solution, is 1mol/L～4mol/L for the sulfuric acid starting point concentration leaching, for the COD of the high concentrated organic wastewater that leaches
crconcentration>=30000mg/L, the add-on of sulfuric acid is that the add-on of high concentrated organic wastewater is with per kilogram MnO by 103%～110% of the theoretical amount that in pyrolusite, all manganese leaches
2add COD
cr0.2 kilogram～0.25 kilogram calculating adds, and the temperature of whole leaching process is 80 ℃～95 ℃, and stirring velocity is 50 r/min～130 r/min, and extraction time is 2h～4h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310736454.0A CN103757250A (en) | 2013-12-29 | 2013-12-29 | Method for leaching pyrolusite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310736454.0A CN103757250A (en) | 2013-12-29 | 2013-12-29 | Method for leaching pyrolusite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103757250A true CN103757250A (en) | 2014-04-30 |
Family
ID=50524564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310736454.0A Pending CN103757250A (en) | 2013-12-29 | 2013-12-29 | Method for leaching pyrolusite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103757250A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1940098A (en) * | 2006-09-21 | 2007-04-04 | 广西大学 | Gray manganese ore leaching out process |
| CN101886168A (en) * | 2010-07-14 | 2010-11-17 | 广西大学 | Extract technology of semi-manganese oxide ore |
-
2013
- 2013-12-29 CN CN201310736454.0A patent/CN103757250A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1940098A (en) * | 2006-09-21 | 2007-04-04 | 广西大学 | Gray manganese ore leaching out process |
| CN101886168A (en) * | 2010-07-14 | 2010-11-17 | 广西大学 | Extract technology of semi-manganese oxide ore |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140430 |