CN100554165C - A kind of method of trimanganese tetroxide preparation - Google Patents
A kind of method of trimanganese tetroxide preparation Download PDFInfo
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- CN100554165C CN100554165C CNB2007101795792A CN200710179579A CN100554165C CN 100554165 C CN100554165 C CN 100554165C CN B2007101795792 A CNB2007101795792 A CN B2007101795792A CN 200710179579 A CN200710179579 A CN 200710179579A CN 100554165 C CN100554165 C CN 100554165C
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- manganese
- trimanganese tetroxide
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- manganous carbonate
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Abstract
A kind of method of trimanganese tetroxide preparation belongs to field of inorganic nonmetallic material.Present method is with the scavenging solution of manganese ore leach liquor---manganese sulfate solution is a raw material, make precipitation agent with carbonic acid (hydrogen) salt, the mn ion of solution in the manganous sulfate is precipitated as the manganous carbonate throw out, again under 120～800 ℃, with air or oxygen manganous carbonate being decomposed into the mixture of the manganese that contains Manganse Dioxide, manganese monoxide and manganous carbonate etc. through thermooxidizing, is trimanganese tetroxide with the mixture roasting of manganese under 800～1200 ℃ then.Almost there is not the dust raising phenomenon of manganic compound to take place in the preparation process, the manganese recovery ratio height, the trimanganese tetroxide activity of acquisition is good, and cost is low.
Description
Technical field
The invention belongs to field of inorganic nonmetallic material, particularly a kind of method for preparing trimanganese tetroxide with manganous carbonate through the mixture of the manganese of extreme heat decomposition acquisition.
Background technology
Trimanganese tetroxide (Mn
3O
4) be one of main raw material(s) of preparation soft magnetic manganese-zinc ferrite, other starting material are Fe
2O
3And ZnO.
Mn-Zn ferrite is a kind of high performance magneticsubstance, be widely used in electrical equipment, communication, the contour technology industry of information, be used for war products such as air defense missile system, polarization Phased Array Radar Antenna, prior-warning plane antenna, solid-state phased array assembly, monopulse precision tracking instrumentation radar.Be used to make various magnetic cores, information storage material, magnetic head etc.The Mn-Zn ferrite performance is good, and then core volume dwindles, and the required coil turn of inducer reduces.Along with developing rapidly of these industry technologies, require electronics miniaturization, lightweight, tackle Mn-Zn ferrite mutually and proposed light, thin, short and small requirement, the demand of high-performance soft magnetic manganese-zinc ferrite is also grown with each passing day, annual growth rate is greater than 10%.
About 70,000 tons of the throughput of present domestic trimanganese tetroxide, market demand surpasses 50,000 tons, mainly satisfies domestic demand.METHODS OF MAKING MANGANIC MANGANOUS OXIDE has manganese powder suspension catalytic oxidation, roasting method, reduction method and manganese salt solution thermal oxidation method etc.At present the main method of preparation trimanganese tetroxide is an electrolytic metal manganese powder suspension catalytic oxidation, this method technical maturity, but insufficiently have: the one, the production cost height; The 2nd, foreign matter content is generally higher; The 3rd, specific surface area is less.Also can prepare trimanganese tetroxide with the oxidation of manganous carbonate direct roasting, but the oxidising process complexity, poor product quality, even more serious is at high temperature emits great amount of carbon dioxide rapidly because of manganous carbonate and is easy to dust and causes a large amount of manganic compounds losses.
Summary of the invention
The present invention seeks to improve manganous carbonate sinter process process and prepare trimanganese tetroxide, solve manganous carbonate and at high temperature emit great amount of carbon dioxide rapidly and be easy to dust and cause a large amount of manganic compounds loss problems.
A kind of method for preparing trimanganese tetroxide is characterized in that the method that adopts heated oxide to decompose manganous carbonate earlier prepares the mixture of manganese.The preparation condition of the mixture of manganese is the scavenging solution with the manganese ore leach liquor---manganese sulfate solution is a raw material, make precipitation agent with carbonate or supercarbonate, the mn ion of solution in the manganous sulfate is precipitated as the manganous carbonate throw out, with air or oxygen as oxygenant, under 120～800 ℃ and thermal decomposition time are 0.1～30 hour condition, obtain the mixture of manganese by oxidation.It is 800～1200 ℃ of maturing temperatures that the mixture of manganese is carried out the condition that roasting prepares trimanganese tetroxide, roasting time 0.01～10 hour.
In the presence of air or oxygen, the slow portion of hot of manganous carbonate is decomposed into the mix products of manganese, contains Manganse Dioxide, manganese monoxide and manganous carbonate etc. in the mixture of manganese.The content of manganous carbonate reduces significantly in the mixture of manganese, causes the loss of manganese mixture airborne dust to lay a good foundation for avoiding high-temperature roasting.The manganous carbonate thermal decomposition product that obtains can be prepared high-quality trimanganese tetroxide through calcination process.
Present method with manganous carbonate slowly partial oxidation decomposition under relatively lower temp, makes its mixture that becomes manganese, again the mixture system trimanganese tetroxide of roasting manganese earlier.This method is slower because of manganous carbonate decomposing oxidation speed, almost do not have the manganic compound dust, and product quality is good.
Embodiment
Embodiment 1
In manganese sulfate solution, add basic metal carbonic acid (hydrogen) salt or carbonic acid (hydrogen) ammonium, the manganous carbonate of acquisition under 300 ℃ of conditions, blowing air oxidation 10 hours, the mixture product of manganese.At 900 ℃ of following mixtures 10 minutes of calcining manganese, trimanganese tetroxide.
Embodiment 2
In manganese sulfate solution, add basic metal carbonic acid (hydrogen) salt or carbonic acid (hydrogen) ammonium, the manganous carbonate of acquisition under 380 ℃ of conditions, blowing air oxidation 5 hours, the mixture product of manganese.At 980 ℃ of following mixtures 1 minute of calcining manganese, trimanganese tetroxide.
Embodiment 3
In manganese sulfate solution, add basic metal carbonic acid (hydrogen) salt or carbonic acid (hydrogen) ammonium, the manganous carbonate of acquisition under 450 ℃ of conditions, blowing air oxidation 7 hours, the mixture product of manganese.At 1100 ℃ of following mixtures 60 minutes of calcining manganese, trimanganese tetroxide.
Embodiment 4
In manganese sulfate solution, add basic metal carbonic acid (hydrogen) salt or carbonic acid (hydrogen) ammonium, the manganous carbonate of acquisition under 650 ℃ of conditions, blowing air oxidation 4 hours, the mixture product of manganese.At 950 ℃ of following mixtures 0.5 minute of calcining manganese, trimanganese tetroxide.
Claims (2)
1. method for preparing trimanganese tetroxide, it is characterized in that the method that adopts heated oxide to decompose manganous carbonate earlier prepares the mixture of manganese, preparation condition is the scavenging solution with the manganese ore leach liquor---manganese sulfate solution is a raw material, make precipitation agent with carbonate or supercarbonate, the mn ion of solution in the manganous sulfate is precipitated as the manganous carbonate throw out, with air or oxygen as oxygenant, under 120～800 ℃ and thermal decomposition time are 0.1～30 hour condition, get the mixture of manganese by oxidation, then the mixture of manganese is carried out roasting and obtain trimanganese tetroxide, roasting condition is 800～1200 ℃ of maturing temperatures, roasting time 0.01～10 hour.
2. a kind of according to claim 1 method for preparing trimanganese tetroxide is characterized in that containing Manganse Dioxide in the mixture of manganese is 20～90%, and other are manganese monoxide and manganous carbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101795792A CN100554165C (en) | 2007-12-14 | 2007-12-14 | A kind of method of trimanganese tetroxide preparation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101795792A CN100554165C (en) | 2007-12-14 | 2007-12-14 | A kind of method of trimanganese tetroxide preparation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101177304A CN101177304A (en) | 2008-05-14 |
| CN100554165C true CN100554165C (en) | 2009-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101795792A Expired - Fee Related CN100554165C (en) | 2007-12-14 | 2007-12-14 | A kind of method of trimanganese tetroxide preparation |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560156A (en) * | 2012-02-23 | 2012-07-11 | 中国恩菲工程技术有限公司 | Method for recycling manganese from P204 manganese back extraction solution in nickel laterite hydrometallurgical process |
| JP6194618B2 (en) * | 2012-04-20 | 2017-09-13 | 東ソー株式会社 | Trimanganese tetraoxide and method for producing the same |
| CN102765760B (en) * | 2012-08-16 | 2014-03-19 | 深圳市新昊青科技有限公司 | Preparation method of manganous-manganic oxide and manganous-manganic oxide |
| CN103771523B (en) * | 2014-01-15 | 2015-01-28 | 北京科技大学 | Method for preparing micro-fine spherical Mn3O4 powder by using MnCO3 as raw material |
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2007
- 2007-12-14 CN CNB2007101795792A patent/CN100554165C/en not_active Expired - Fee Related
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| CN101177304A (en) | 2008-05-14 |
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Effective date of registration: 20140807 Address after: 875 box 30, Metallurgy College, 100083, Beijing, Xueyuan Road Patentee after: Li Hongliang Address before: 100083 Haidian District, Xueyuan Road, No. 30, Patentee before: University of Science and Technology Beijing |
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