CN101880767A - Process for reducing leached pyrolusite ore by iron powder - Google Patents
Process for reducing leached pyrolusite ore by iron powder Download PDFInfo
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- CN101880767A CN101880767A CN 201010195565 CN201010195565A CN101880767A CN 101880767 A CN101880767 A CN 101880767A CN 201010195565 CN201010195565 CN 201010195565 CN 201010195565 A CN201010195565 A CN 201010195565A CN 101880767 A CN101880767 A CN 101880767A
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- pyrolusite
- iron powder
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- manganese
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Abstract
The invention discloses a process for reducing leached pyrolusite ore by iron powder, which comprises: crushing pyrolusite ore to 40 to 400 meshes, and preparing ore pulp by using water or anode solution of electrolytic manganese in an amount which is 2 to 10 times the mass of the pyrolusite ore; adding 93 to 98 percent sulfuric acid in an amount which is 0.2 to 1.0 time the mass of the pyrolusite ore into the ore pulp; adding iron powder in an amount of 5 to 30 percent based on the mass of the pyrolusite ore into the ore pulp, stirring the mixture at 40 to 100 DEG C to perform an reaction for more than 0.5 hour, and performing filter pressing to obtain solution of reduced manganese sulfate, wherein the leaching rate of the manganese is over 95 percent. In the invention, the production process uses the conventional manganese sulfate or electrolytic manganese compound leaching equipment and production operation process without increasing equipment investment and changing operation process; the reaction conditions are mild; the reduction and leaching are performed at the same time; the reaction speed is high; the leaching rate is high; and no environment pollution is produced.
Description
Technical field
The present invention relates to a kind of extract technology of pyrolusite, especially relate to a kind of technology of reducing leached pyrolusite ore by iron powder.
Background technology
The pyrolusite of occurring in nature tetravalence manganese (mainly being Manganse Dioxide) ore deposit amount is more, manganese content height, and price is low.But the Manganse Dioxide in the pyrolusite is insoluble to sulfuric acid, must be reduced into bivalent manganese ability and sulfuric acid reaction generation manganous sulfate to it by reduction reaction.
At present, the existing pyrolusite reduction method for preparing manganous sulfate mainly contains reduction roasting method and sulfuric acid leaching.Patent ZL91192845.5 discloses and has a kind ofly added sulphuric acid soln with poor, bad, useless the manganese ore powder and the troilite powder that contain MnO2, generates manganese sulfate solution after the reacting by heating, removes iron ion in the solution with the compressed-air actuated method of feeding again.This method production technology maturation, production cost is lower, but exists the quantity of slag big in producing, and it is many to bring impurity into, the filtering and impurity removing problem of difficult.Patent ZL200310110442.3 discloses a kind of employing biogas as reductive agent, generates the intermediate product that mainly contains MnO by reduction reaction, adds a certain amount of sulfuric acid then, obtains manganese sulfate solution by extract technology.This method does not exist solid impurity to pollute because of not containing inorganics in the biogas, and the easily more purified manganous sulfate of acquisition, and waste water is easy to handle, but but has the difficult problem that the biogas reducing power is poor, leaching yield is low.Patent ZL200810058946.8 discloses a kind of smelting process of producing manganous sulfate under the condition of pressurization with the pyrite reducing pyrolusite, and the leaching yield of its manganese reaches more than 95%.But this reaction needs to carry out in autoclave, and is higher to equipment requirements.
Summary of the invention
The object of the present invention is to provide a kind of energy consumption low, pollute little, raw material sources easily, the lower technology of utilizing reducing leached pyrolusite ore by iron powder of manufacturing requirements.
The purpose of this project is achieved in that it comprises the steps:
(1) pyrolusite is pulverized the 40-400 order, with pyrolusite quality 2-10 water or electrolytic manganese anolyte modulation ore pulp doubly;
(2) sulfuric acid that to add 0.2-1.0 times of concentration of pyrolusite quality in the ore pulp be 93-98%;
(3) follow the iron powder that in ore pulp, adds pyrolusite quality 5-30%, stirring reaction is more than 0.5 hour under 40-100 ℃ of temperature, press filtration obtains reduction and leaches manganese sulfate solution, carry out removal of impurities by the chemical subtraction method of routine then, filtration obtains the purified manganese sulfate solution, and the leaching yield of manganese can reach more than 95%.
Mn content is greater than 10% in the described pyrolusite.
In the oxidation scum processing reduced iron powder that described iron powder can produce for various reduced iron powders, industrial scrap iron powder or gas washing in SA production one or more.
Beneficial effect of the present invention is:
(1) the existing manganous sulfate of production technique utilization of the present invention or electrolytic manganese chemical combination leaching plant and production operation technology need not increase facility investment and change operating procedure, economize on the use of funds, and reduce cost.
(2) compare with adopting molasses, starch, saw dust, husk or the like plant origin reductive agent, the reaction conditions gentleness does not need heat equipment, and speed of response is fast, and manganese leaching yield height can reach more than 95%.
(3) compare with reduction calcination method, technological reaction mild condition of the present invention, reduction, leaching are carried out simultaneously, and operational condition is good, can not produce a large amount of SO
2, CO
2With contaminate environment such as dust.
(4) compare as reductive agent with adopting sulfurous iron ore, it is less that technology of the present invention is introduced inorganic impurity, reduced follow-up purification of leaching liquor operation, and the Fe that forms in the iron removal (OH)
3Colloid also can absorbed portion impurity, helps to purify.
Embodiment
Embodiment 1:
Pyrolusite (containing Mn18.6%, Fe8.2%) is crushed to 200 orders, accurately take by weighing 100g, be modulated into ore pulp with 0.6L water, add 60g concentration in the ore pulp and be 98% sulfuric acid, and then add the reduced iron powder of 11.1g in the ore pulp, stirring reaction is 1 hour under 95 ℃ of temperature, and press filtration obtains reduction and leaches manganese sulfate solution, and the leaching yield of its manganese can reach 97%.
Embodiment 2:
Pyrolusite (containing Mn22.4%, Fe 6.7%) is crushed to 100 orders, accurately takes by weighing 100g, (contain Mn14.2g/L, H with 0.7L electrolytic manganese anolyte
2SO
429.7g/L) be modulated into ore pulp, add 30g concentration in the ore pulp and be 98% sulfuric acid, and then in the ore pulp the industrial waste iron filing of adding 13.5g, stirring reaction is 2 hours under 70 ℃ of temperature, press filtration obtains reduction and leaches manganese sulfate solution, and the leaching yield of its manganese can reach 96%.
Embodiment 3:
Pyrolusite (containing Mn14.6%, Fe11.2%) is crushed to 50 orders, accurately take by weighing 300g, be modulated into ore pulp with 0.5L water, add 80g concentration in the ore pulp and be 95% sulfuric acid, and then add the industrial scrap iron powder of 8.6g in the ore pulp, stirring reaction is 2 hours under 70 ℃ of temperature, and press filtration obtains reduction and leaches manganese sulfate solution, and the leaching yield of manganese can reach 95%.
Embodiment 4:
Pyrolusite (containing Mn18.6%, Fe8.2%) is crushed to 200 orders, accurately takes by weighing 100g, (contain Mn14.2g/L, H with 0.6L electrolytic manganese anolyte
2SO
429.7g/L) be modulated into ore pulp, add 60g concentration in the ore pulp and be 98% sulfuric acid, and then in the ore pulp reduced iron powder of adding 11.1g, stirring reaction is 1 hour under 95 ℃ of temperature, press filtration obtains reduction and leaches manganese sulfate solution, and the leaching yield of its manganese can reach 96%.
Embodiment 5:
Pyrolusite (containing Mn14.6%, Fe 11.2%) is crushed to 100 orders, accurately take by weighing 100g, be modulated into ore pulp with 0.4L water, add 60g concentration in the ore pulp and be 98% sulfuric acid, and then add the iron filings (powder) of 8.6g in the ore pulp, stirring reaction is 2 hours under 95 ℃ of temperature, and press filtration obtains reduction and leaches manganese sulfate solution, and the leaching yield of manganese can reach 96%.
Claims (5)
1. the technology of a reducing leached pyrolusite ore by iron powder is characterized in that:
(1) pyrolusite is pulverized the 40-400 order, with pyrolusite quality 2-10 water or electrolytic manganese anolyte modulation ore pulp doubly;
(2) sulfuric acid that to add 0.2-1.0 times of concentration of pyrolusite quality in the ore pulp be 93-98%;
(3) follow the iron powder that adds pyrolusite quality 5-30% in ore pulp, stirring reaction is more than 0.5 hour under 40-100 ℃ of temperature, and press filtration obtains reduction and leaches manganese sulfate solution, and the leaching yield of manganese can reach more than 95%.
2. the technology of a kind of reducing leached pyrolusite ore by iron powder according to claim 1, it is characterized in that: Mn content is greater than 10% in the described pyrolusite.
3. the technology of a kind of reducing leached pyrolusite ore by iron powder according to claim 1, it is characterized in that: described iron powder is various reduced iron powders.
4. the technology of a kind of reducing leached pyrolusite ore by iron powder according to claim 1, it is characterized in that: described iron powder is industrial scrap iron powder.
5. the technology of a kind of reducing leached pyrolusite ore by iron powder according to claim 1 is characterized in that: described iron powder is the oxidation scum processing reduced iron powder that gas washing in SA production produces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010195565 CN101880767A (en) | 2010-06-07 | 2010-06-07 | Process for reducing leached pyrolusite ore by iron powder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010195565 CN101880767A (en) | 2010-06-07 | 2010-06-07 | Process for reducing leached pyrolusite ore by iron powder |
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| CN101880767A true CN101880767A (en) | 2010-11-10 |
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| CN 201010195565 Pending CN101880767A (en) | 2010-06-07 | 2010-06-07 | Process for reducing leached pyrolusite ore by iron powder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070198A (en) * | 2011-02-28 | 2011-05-25 | 湖南科技大学 | Method for preparing high-purity manganese sulfate and high-purity manganese carbonate by reduction leaching of pyrolusite through scrap iron |
| CN102094119A (en) * | 2011-01-21 | 2011-06-15 | 吉首大学 | Method for preparing electrolytic manganese metal with low-grade pyrolusite wet leaching |
| CN104016417A (en) * | 2014-06-10 | 2014-09-03 | 吉首大学 | Process for preparing electronic grade manganous-manganic oxide and byproduct nano-iron oxide red from pyrolusite |
| CN110616317A (en) * | 2019-10-31 | 2019-12-27 | 云南江南锰业股份有限公司 | Manganese ore reduction equipment and reduction method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1210893A (en) * | 1997-09-09 | 1999-03-17 | 邓建成 | Process for extracting manganese ore with sulfuric acid at ordinary temperature |
| CN101717956A (en) * | 2009-12-21 | 2010-06-02 | 潘国武 | Method for preparing electrolytic manganese metal electrolytic solution by pyrolusite water law |
-
2010
- 2010-06-07 CN CN 201010195565 patent/CN101880767A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1210893A (en) * | 1997-09-09 | 1999-03-17 | 邓建成 | Process for extracting manganese ore with sulfuric acid at ordinary temperature |
| CN101717956A (en) * | 2009-12-21 | 2010-06-02 | 潘国武 | Method for preparing electrolytic manganese metal electrolytic solution by pyrolusite water law |
Non-Patent Citations (1)
| Title |
|---|
| 《Hydrometallurgy》 20080718 Mohammad Sh.Bafghi,et al "Reductive dissolution of manganese ore in sulfuric acid in the presence of iron metal" 208-209 1-5 第90卷, 2 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094119A (en) * | 2011-01-21 | 2011-06-15 | 吉首大学 | Method for preparing electrolytic manganese metal with low-grade pyrolusite wet leaching |
| CN102070198A (en) * | 2011-02-28 | 2011-05-25 | 湖南科技大学 | Method for preparing high-purity manganese sulfate and high-purity manganese carbonate by reduction leaching of pyrolusite through scrap iron |
| CN102070198B (en) * | 2011-02-28 | 2012-09-05 | 湖南科技大学 | Method for preparing high-purity manganese sulfate and high-purity manganese carbonate by reduction leaching of pyrolusite through scrap iron |
| CN104016417A (en) * | 2014-06-10 | 2014-09-03 | 吉首大学 | Process for preparing electronic grade manganous-manganic oxide and byproduct nano-iron oxide red from pyrolusite |
| CN104016417B (en) * | 2014-06-10 | 2016-02-03 | 吉首大学 | The nanometer iron oxide red technique of electronic-grade trimanganese tetroxide by-product prepared by pyrolusite |
| CN110616317A (en) * | 2019-10-31 | 2019-12-27 | 云南江南锰业股份有限公司 | Manganese ore reduction equipment and reduction method |
| CN110616317B (en) * | 2019-10-31 | 2021-08-10 | 云南江南锰业股份有限公司 | Manganese ore reduction equipment and reduction method |
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Application publication date: 20101110 |