CN101914676A - Manganese oxide mineral sulfur-based fire reduction method - Google Patents
Manganese oxide mineral sulfur-based fire reduction method Download PDFInfo
- Publication number
- CN101914676A CN101914676A CN 201010275493 CN201010275493A CN101914676A CN 101914676 A CN101914676 A CN 101914676A CN 201010275493 CN201010275493 CN 201010275493 CN 201010275493 A CN201010275493 A CN 201010275493A CN 101914676 A CN101914676 A CN 101914676A
- Authority
- CN
- China
- Prior art keywords
- manganese oxide
- roasting
- oxide mineral
- manganese
- sulfur
- 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.)
- Granted
Links
Abstract
The invention discloses a manganese oxide mineral sulfur-based fire reduction method, which comprises: crushing a manganese oxide mineral and a sulfur-based reducer respectively till the mass percentage content of 1.0-millimeter particles is over 80 percent, and uniformly mixing the crushed manganese oxide mineral and the crushed sulfur-based reducer in a mass ratio of 1:(0.05-0.5); and placing in a closed environment and heating for roasting, wherein the obtained product of the roasting is a mixture of MnO and MnSO4. The method can realize the reduction of the manganese oxide mineral at a lower temperature and has the advantages of low energy consumption, high conversion efficiency, simple process and the like. The method overcomes the drawbacks of high temperature, low efficiency and high energy consumption of the conventional reduction roasting with the carbon-based reducer, and is suitable for processing manganese oxide minerals including pyrolusite, psilomelane, hausmannite, braunite, manganite, metamanganate and the like. In the invention, the process is simple, the operation is convenient, the roasting temperature is low, the energy consumption is low, the rate of the conversion from high-valence manganese to divalent manganese is high; the reduction roasting cost of the manganese oxide minerals can be reduced obviously; and the method is suitable for industrial application. Particularly, the method is suitable for preparing manganese sulfate and electrolytic manganese high-quality materials.
Description
Technical field
The present invention relates to a kind of method of reducing of manganese oxide mineral, be meant a kind of sulfur-based fire reduction method of manganese oxide mineral especially, belong to metallurgy and chemical field.
Background technology
China's manganese resource mainly is divided into manganese oxide ore and manganese carbonate ore two classes.Manganese carbonate ore is mainly used in the production electrolytic manganese, and technology maturation, at home and abroad is used widely.Along with the manganese industrial expansion, the supply of high-quality carbonic acid manganese resource is more and more nervous, has limited the electrolytic manganese industrial expansion to a certain extent.High-grade high price manganese oxide ore is less owing to foreign matter content, the industrial high-quality raw material that can be used as preparation manganous sulfate and electrolytic manganese.But manganese oxide mineral generally all is insoluble to or is slightly soluble in diluted acid, producing manganous sulfate and electrolytic manganese requires at first the Mn oxide in the manganese oxide ore to be reduced to acid soluble MnO, this reduction process is that technical process, production cost and the product quality of product all has significant effects to manganese, so the reduction of manganese oxide ore comprises that wet method and fire reduction are the important subject of domestic and international manganese secondary industry always.
The carbon back fire reduction is to study and use at present maximum fire reduction technology both at home and abroad, according to reduction main equipment difference, can be divided into methods such as rotary kiln, reverberatory furnace, fluidizing furnace/fluidized bed furnace, microwave reduction.
1) kiln process
External electrolytic metal Mn, electrolysis MnO
2Nearly all being to use rotary kiln technology with the production of other manganese salt series products, is raw material with the higher-grade pyrolusite, carries out obtaining the MnO intermediates after the reducing roasting.
The seventies in 20th century, Nanjing Qixia Mountain manganese ore adopts the rotary kiln reducing pyrolusite to be used for the production of nitrate method chemical manganese bioxide.Ground such as the eighties in 20th century domestic Yunnan, Hunan, Guangdong etc. also once built up the reducing roasting that rotary kiln is used for pyrolusite; Yu Zhichun etc. have reported the industrial test result that the Beijing Mine and Metallurgy General Inst transformed Yunnan manganese ore rotary kiln in 1985; Tan Liqun has reported the manganous sulfate production electric heating rotary type reduction kiln of national manganese Technical Committee's exploitation already; The large-sized rotary kiln that Chongzuo, Guangxi Kang Milao chemical company adopts Lanzhou to make carries out the reducing roasting of import higher-grade pyrolusite (manganese content is greater than 45%); Big new branch office of the big manganese of middle letter company used the electrothermic type rotary kiln that low-grade pyrolusite is carried out reducing roasting in 2002; It is thermal source that the western Hunan, Hunan moral nation of autonomous prefecture chemical industry has been carried out with the semi-water gas, uses the test of many thoraxes formula rotary kiln baking reduction-oxidation manganese ore; University Of Chongqing has carried out fundamental research at the manganese oxide ore kiln process in recent years, has obtained reduction effect preferably, but still exists cost than problems such as height.
Kiln process reductive agent hard coal consumption is greater than 100kg/t, and roasting consumes 220～230 cubic metres of coal gas, and the reaction zone temperature is more than 900 ℃.In general, shortcoming such as the rotary kiln reduction roasting method exists that temperature height, energy consumption height, environmental issue are serious, easily scab in the kiln, production cost can be in any more always.
2) reflection oven process
" two ore deposit roasting methods " adopted in elegant chemical plant, Mei County, Guangdong, promptly pyrolusite and pyrite baking mixed-research of water logging explained hereafter manganous sulfate, on the basis of small-scale test, adopt reverberatory furnace to carry out the extension test and obtained test index preferably.Yet, though reverberatory furnace is simple in structure, less investment, the energy consumption height, yield per unit is little, labour intensity is big, stopping property is poor, seriously polluted.Overall heat consumption is 7732～7751MJ/t raw ore, produces but country has now prohibited this method of employing.
3) fluidizing furnace/fluidization oven process
Fluidizing furnace and fluidized bed furnace adopt the combustion gases of coal gas or reductibility to heat reducing pyrolusite as fluidizing medium.Guangxi Aug. 1st manganese ore once in the individual layer fluidizing furnace of the experiment seventies in 20th century day processing 100t oxidized ore, used producer gas or coal dust as reductive agent and fuel.The Sheng Tana factory of Brazil ICOMI mining company has adopted the large-scale reduction roaster of two form fluidised form layers of Dao Er-Laurence Olivier company, day processing 1000t fine ore.But because heating and reduction ore are finished in same burner hearth, make furnace atmosphere be difficult to reasonable control, cause the hear rate height, thermo-efficiency is low, and dust rate is big, the carbon residue height, thereby production cost is also high.
Manganese product company and Wuhan University of Technology's cooperation development " the pyrolusite fluidization fast restore roasting technology " research of newly shaking of Daxin County, Guangxi; Tsing-Hua University and the cooperation development of chemical plant, Quanzhou the basis and the technical study of fluidized reduction of manganese oxide ore, reduction effect is better, but through engineering approaches not as yet.
Changsha Mining ﹠ Metallurgy Inst has applied for patent " a kind of reduction calcination method and equipment that is used for the high price manganese oxide mineral " (application number: 200910303854.6), this method produces reduction required atmosphere and temperature by the coefficient of excess air in the control hotblast stove, and manganese oxide powder is reduced to the MnO of solubility in fluidized roaster.This method is not seen below continuous report.
Generally speaking, fluidizing furnace and fluidized bed furnace reducing roasting are still located to explore and development in China at present, and technology is prematurity also, also exist that system energy consumption is big, heat can not reclaim, support equipment is than shortcomings such as complexity.
4) microwave reduction method
Microwave reducing roasting can be realized the automatization control of serialization production and whole process, and does not have dust, noise, waste heat pollution, has fundamentally improved working condition.In order to make the microwave calcining reducing pyrolusite can realize commercial application, domestic in recent years relevant research institution has carried out many researchs, will be through the test of production practice but still need.
In addition to the above methods, the western Hunan, Hunan gold rising sun smelting group adopts gas-based shaft kiln to carry out the reduction commerical test of higher-grade pyrolusite, has obtained certain progress, but has still in producing that production capacity is low, energy consumption is higher, produces problem such as not direct motion.
In a word, existing employing coke, hard coal, water-gas, CO etc. are the carbon back reduction method of reductive agent, ubiquity maturing temperature height (greater than 850 ℃), facility investment is big, energy consumption is high (the anthracitic consumption of coal base reduction is greater than 100kg/t), the cost height (is generally problems such as 380 yuan/t～450 yuan/t), causes the carbon back fire reduction method in industrial less application.
The manganese oxide ore sulfenyl method of reducing of research and development new type low temperature, less energy-consumption is of great practical significance to the shortage problem that solves manganous sulfate and electrolytic manganese high quality raw material.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art and provide a kind of technology simple, easy to operate, maturing temperature is low, energy consumption is low, high price manganese is to the transformation efficiency height of bivalent manganese, can significantly reduce the sulfur-based fire reduction method of the manganese oxide mineral of manganese oxide ore reducing roasting cost.
The sulfur-based fire reduction method of a kind of manganese oxide mineral of the present invention comprises the steps:
The first step: manganese oxide mineral and sulfenyl reductive agent be crushed to respectively-the shared mass percent of 1.0mm grade is greater than 80%, then with both by mass ratio 1: (0.05～0.5) mixes;
Second step: the first step gained mixture inserted add thermal bake-out in the closed environment, maturing temperature is 400 ℃～800 ℃, and roasting time is 5min～120min; The gained product of roasting is MnO and MnSO
4Mixture.
Among the present invention, described manganese oxide mineral is selected from least a in pyrolusite, psilomelane, hausmannite, brunite, manganite, the meta-manganic acid ore.
Among the present invention, the second step gained product of roasting adopts method of chemical phase analysis to detect, and its main ingredient is MnO and MnSO
4
Among the present invention, be 10%～40% dilute sulphuric acid stripping with the second step gained product of roasting mass percentage concentration, the solubility rate that records Mn is greater than 85%.
Sulfenyl reductive agent of the present invention source is wide, comprises industrial sulphur and sulfureted industry byproduct, and wherein the mass percent of sulphur is greater than 75%.
Know-why of the present invention is sketched in following: add thermal bake-out under certain temperature and atmospheric condition, sulphur and Mn oxide react, and are converted into MnO and MnSO
4
To pyrolusite, its reaction formula is: 3MnO
2+ S=2MnO+MnSO
4
To hausmannite, its reaction is: 3Mn
3O
4+ S=8MnO+MnSO
4
To brunite, its reaction is: 3Mn
2O
3+ S=5MnO+MnSO
4
Psilomelane, manganite, the meta-manganic acid ore that contains crystal water removes crystal water in roasting process after, also be reduced to MnO and MnSO by above-mentioned reaction
4
Adopt the present invention, be applicable to and handle the manganese oxide mineral that comprises pyrolusite, psilomelane, hausmannite, brunite, manganite, meta-manganic acid ore etc.The method of being developed just can realize the reduction of manganese oxide ore under lower temperature, it is low to have energy consumption, the transformation efficiency height, advantages such as technology is simple, the shortcoming that temperature height, efficient are low, energy consumption is high that has existed when having overcome present employing carbon based reductive reducing roasting can be reduced to the cost of manganese oxide ore reducing roasting below 300 yuan/ton.
The present invention is applicable to and handles the manganese oxide ore that comprises pyrolusite, psilomelane, hausmannite, brunite, manganite, meta-manganic acid ore etc.
In sum, technology of the present invention is simple, and is easy to operate, maturing temperature is low, energy consumption is low, high price manganese is to the transformation efficiency height of bivalent manganese, can significantly reduce manganese oxide ore reducing roasting cost, is suitable for industrial applications.Be particularly suitable for preparing manganous sulfate and electrolytic manganese high quality raw material.
Embodiment
Embodiment 1
With the Mn grade be in advance 53.3% pyrolusite stone be crushed to-the shared mass percent of 1.0mm grade is 80%, sulfureted industry byproduct (the S grade is 85%) is crushed to-the shared mass percent 84% of 1.0mm grade, then both is mixed by mass ratio at 1: 0.22; Again both mixtures are inserted and add thermal bake-out in the reactor, 750 ℃ of maturing temperatures, roasting time is 20min; Product of roasting employing mass percent is 20% dilute sulphuric acid stripping, and the leaching yield of Mn is 94.6%.
Embodiment 2
With the Mn grade be in advance 43.5% manganese oxide ore (for the mixture of pyrolusite and hausmannite) be crushed to-the shared mass percent of 1.0mm grade is 85%, industrial sulphur (the S grade is 99%) is finely ground to-the shared mass percent 80% of 1.0mm grade, then both is mixed by mass ratio at 1: 0.15; Again both mixtures are inserted and add thermal bake-out in the reactor, 700 ℃ of maturing temperatures, roasting time is 30min; Product of roasting employing mass percent is 10% dilute sulphuric acid stripping, and the leaching yield of Mn is 93.8%.
Embodiment 3
With the Mn grade be in advance 36.4% psilomelane be crushed to-the shared mass percent of 1.0mm grade is 95%, industrial sulphur (the S grade is 94%) is crushed to-the shared mass percent 90% of 1.0mm grade, then both is mixed by mass ratio at 1: 0.3; Again both mixtures are inserted and add thermal bake-out in the reactor, 600 ℃ of maturing temperatures, roasting time is 55min; Product of roasting employing mass percent is 20% dilute sulphuric acid stripping, and the leaching yield of Mn is 92.6%.
Embodiment 4
With the Mn grade be in advance 28.6% manganese oxide ore (mixture of pyrolusite, psilomelane, hausmannite, brunite) be crushed to-the shared mass percent of 1.0mm grade is 90%, sulfureted industry byproduct (the S grade is 90%) is crushed to-the shared mass percent 80% of 1.0mm grade, then both is mixed by mass ratio at 1: 0.05; Again both mixtures are inserted and add thermal bake-out in the reactor, 800 ℃ of maturing temperatures, roasting time is 5min; Product of roasting employing mass percent is 40% dilute sulphuric acid stripping, and the leaching yield of Mn is 91.5%.
Embodiment 5
With the Mn grade be in advance 21.7% brunite stone be crushed to-the shared mass percent of 1.0mm grade is 80%, sulfureted industry byproduct (the S grade is 75%) is crushed to-the shared mass percent 80% of 1.0mm grade, then both is mixed by mass ratio at 1: 0.5; Again both mixtures are inserted and add thermal bake-out in the reactor, 550 ℃ of maturing temperatures, roasting time is 90min; Product of roasting employing mass percent is 20% dilute sulphuric acid stripping, and the leaching yield of Mn is 88.4%.
Embodiment 6
With the Mn grade be in advance 33.7% manganese oxide ore (for the mixture of pyrolusite, psilomelane, hausmannite, brunite, manganite, meta-manganic acid ore) be crushed to-the shared mass percent of 1.0mm grade is 95%, industrial sulphur (the S grade is 96%) is crushed to-the shared mass percent 90% of 1.0mm grade, then both is mixed by mass ratio at 1: 0.15; Again both mixtures are inserted and add thermal bake-out in the reactor, 400 ℃ of maturing temperatures, roasting time is 120min; Product of roasting employing mass percent is 30% dilute sulphuric acid stripping, and the leaching yield of Mn is 85.2%.
Claims (6)
1. the sulfur-based fire reduction method of a manganese oxide mineral comprises the steps:
The first step: manganese oxide mineral and sulfenyl reductive agent be crushed to respectively-the shared mass percent of 1.0mm grade is greater than 80%, then with both by mass ratio 1: (0.05～0.5) mixes;
Second step: the first step gained mixture inserted add thermal bake-out in the closed environment, maturing temperature is 400 ℃～800 ℃, and roasting time is 5min～120min; The gained product of roasting is MnO and MnSO
4Mixture.
2. the sulfur-based fire reduction method of a kind of manganese oxide mineral according to claim 1 comprises the steps:
The first step: manganese oxide mineral and sulfenyl reductive agent be crushed to respectively-the shared mass percent of 1.0mm grade is greater than 80%, then with both by mass ratio 1: (0.1～0.4) mixes;
Second step: the first step gained mixture inserted add thermal bake-out in the closed environment, maturing temperature is 500 ℃～700 ℃, and roasting time is 25min～100min; The gained product of roasting is MnO and MnSO
4Mixture.
3. the sulfur-based fire reduction method of a kind of manganese oxide mineral according to claim 1 comprises the steps:
The first step: manganese oxide mineral and sulfenyl reductive agent be crushed to respectively-and the shared mass percent of 1.0mm grade is greater than 80%, then both mixed by mass ratio at 1: 0.25;
Second step: the first step gained mixture inserted add thermal bake-out in the closed environment, maturing temperature is 600 ℃, and roasting time is 60min; The gained product of roasting is MnO and MnSO
4Mixture.
4. according to the sulfur-based fire reduction method of claim 1,2 or 3 any described a kind of manganese oxide minerals, it is characterized in that: described manganese oxide mineral is selected from least a in pyrolusite, psilomelane, hausmannite, brunite, manganite, the meta-manganic acid ore.
5. the sulfur-based fire reduction method of a kind of manganese oxide mineral according to claim 4, it is characterized in that: described sulfenyl reductive agent is selected from industrial sulphur or sulfureted industry byproduct, and wherein the mass percent of sulphur is greater than 75%.
6. the sulfur-based fire reduction method of a kind of manganese oxide mineral according to claim 5 is characterized in that: with the second step gained product of roasting mass percentage concentration is 10%～40% dilute sulphuric acid stripping, and the solubility rate that records Mn is greater than 85%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102754931A CN101914676B (en) | 2010-09-08 | 2010-09-08 | Manganese oxide mineral sulfur-based fire reduction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102754931A CN101914676B (en) | 2010-09-08 | 2010-09-08 | Manganese oxide mineral sulfur-based fire reduction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101914676A true CN101914676A (en) | 2010-12-15 |
| CN101914676B CN101914676B (en) | 2011-10-26 |
Family
ID=43322311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102754931A Active CN101914676B (en) | 2010-09-08 | 2010-09-08 | Manganese oxide mineral sulfur-based fire reduction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101914676B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011018A (en) * | 2010-12-20 | 2011-04-13 | 陈德根 | Method for reducing manganese oxide by internal-heat rotary kiln |
| CN102320665A (en) * | 2011-07-27 | 2012-01-18 | 姚茂君 | Application of secondary air to process for reducing pyrolusite and producing sulfuric acid in fluidized bed furnace |
| CN102766760A (en) * | 2012-07-31 | 2012-11-07 | 中南大学 | Tunnel kiln reduction roasting method of high-valence manganese oxide ores |
| CN102815751A (en) * | 2012-09-20 | 2012-12-12 | 长沙矿冶研究院有限责任公司 | Method for smelting and preparing manganese sulfate from braunite |
| CN103194767A (en) * | 2013-04-16 | 2013-07-10 | 中南大学 | Method for preparing manganese sulfate electrolyte by using high-iron and high-phosphor manganese ores |
| CN103740929A (en) * | 2014-01-26 | 2014-04-23 | 中南大学 | Additive and method for reinforcing separation of manganese and iron through magnetic roasting-magnetic separation of high-iron manganese oxide ore |
| CN107937710A (en) * | 2017-10-19 | 2018-04-20 | 四川大学 | A kind of pyrolusite fire reduction method |
| CN112551589A (en) * | 2020-11-24 | 2021-03-26 | 湘西蒙成科技有限责任公司 | Energy-saving reduction method of manganese dioxide, manganese dioxide and application |
| CN113564344A (en) * | 2021-07-28 | 2021-10-29 | 广西锰华新能源科技发展有限公司 | Method for reducing pyrolusite by gas |
| CN114959314A (en) * | 2022-05-27 | 2022-08-30 | 广西科学院 | Method for reducing manganese oxide ore powder by using microwave roasting charcoal waste |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3348912A (en) * | 1963-09-23 | 1967-10-24 | Utah Construction & Mining Co | Method of preparing manganese sulfate from pyrite reduced manganese dioxide ores |
| CN1161936A (en) * | 1997-02-18 | 1997-10-15 | 周保强 | Method for direct production of manganese sulfate by sulfur dioxide gas |
| JP2002037628A (en) * | 2000-05-19 | 2002-02-06 | Tosoh Corp | Manganese ore-reduced substance and method of producing it |
-
2010
- 2010-09-08 CN CN2010102754931A patent/CN101914676B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3348912A (en) * | 1963-09-23 | 1967-10-24 | Utah Construction & Mining Co | Method of preparing manganese sulfate from pyrite reduced manganese dioxide ores |
| CN1161936A (en) * | 1997-02-18 | 1997-10-15 | 周保强 | Method for direct production of manganese sulfate by sulfur dioxide gas |
| JP2002037628A (en) * | 2000-05-19 | 2002-02-06 | Tosoh Corp | Manganese ore-reduced substance and method of producing it |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011018A (en) * | 2010-12-20 | 2011-04-13 | 陈德根 | Method for reducing manganese oxide by internal-heat rotary kiln |
| CN102320665A (en) * | 2011-07-27 | 2012-01-18 | 姚茂君 | Application of secondary air to process for reducing pyrolusite and producing sulfuric acid in fluidized bed furnace |
| CN102766760A (en) * | 2012-07-31 | 2012-11-07 | 中南大学 | Tunnel kiln reduction roasting method of high-valence manganese oxide ores |
| CN102815751B (en) * | 2012-09-20 | 2014-07-23 | 长沙矿冶研究院有限责任公司 | Method for smelting and preparing manganese sulfate from braunite |
| CN102815751A (en) * | 2012-09-20 | 2012-12-12 | 长沙矿冶研究院有限责任公司 | Method for smelting and preparing manganese sulfate from braunite |
| CN103194767A (en) * | 2013-04-16 | 2013-07-10 | 中南大学 | Method for preparing manganese sulfate electrolyte by using high-iron and high-phosphor manganese ores |
| CN103194767B (en) * | 2013-04-16 | 2016-06-01 | 中南大学 | High ferro high-phosphorus manganese is utilized to prepare the method for manganese sulfate electrolyte |
| CN103740929A (en) * | 2014-01-26 | 2014-04-23 | 中南大学 | Additive and method for reinforcing separation of manganese and iron through magnetic roasting-magnetic separation of high-iron manganese oxide ore |
| CN103740929B (en) * | 2014-01-26 | 2015-05-13 | 中南大学 | Additive and method for reinforcing separation of manganese and iron through magnetic roasting-magnetic separation of high-iron manganese oxide ore |
| CN107937710A (en) * | 2017-10-19 | 2018-04-20 | 四川大学 | A kind of pyrolusite fire reduction method |
| CN107937710B (en) * | 2017-10-19 | 2020-06-02 | 四川大学 | Pyrolusite pyrogenic reduction method |
| CN112551589A (en) * | 2020-11-24 | 2021-03-26 | 湘西蒙成科技有限责任公司 | Energy-saving reduction method of manganese dioxide, manganese dioxide and application |
| CN113564344A (en) * | 2021-07-28 | 2021-10-29 | 广西锰华新能源科技发展有限公司 | Method for reducing pyrolusite by gas |
| CN114959314A (en) * | 2022-05-27 | 2022-08-30 | 广西科学院 | Method for reducing manganese oxide ore powder by using microwave roasting charcoal waste |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101914676B (en) | 2011-10-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101914676B (en) | Manganese oxide mineral sulfur-based fire reduction method | |
| Li et al. | Pilot-scale study on enhanced carbothermal reduction of low-grade pyrolusite using microwave heating | |
| CN101386921B (en) | Method for separating V-Ti-Fe fine powder | |
| CN102676796B (en) | Method for processing vanadium titano-magnetite | |
| CN101586172B (en) | Method for preparing metallized pellet and reduced iron powder | |
| CN105907948B (en) | The method of the low-grade magnetic separation of metallized pellet containing chromic vanadium-titanium ferroferrite separation | |
| CN104164526B (en) | A kind of iron ore short route direct-reduction produces molten iron technique | |
| CN101787407B (en) | Method for reducing and extracting copper smelting waste slag through microwave carbon heating | |
| CN101575654B (en) | Process and device for preparing iron alloy containing nickel and nickel-chromium | |
| CN108165730A (en) | The method for producing manganese monoxide using sawdust reduction roasting manganese oxide ore | |
| CN102417976B (en) | Method for preparing oxidated pellets from pure hematite concentrate | |
| CN103667572A (en) | Gas-based shaft-furnace direct-reduction smelting method for high-chromium-content vanadium-titanium magnetite | |
| CN103233114A (en) | Method for producing nickel/ferrum from nickel laterite ores | |
| Chen et al. | Investigation on microwave carbothermal reduction behavior of low-grade pyrolusite | |
| Durmaz et al. | Evaluation of performance of copper converter slag as oxygen carrier in chemical-looping combustion (CLC) | |
| CN107082429A (en) | A kind of method that utilization Dust of Iron And Steel Works prepares cementite | |
| CN103509936A (en) | Gas base selective reduction method for preparing high-grade nickel ore concentrate from laterite nickel ores | |
| CN111733330A (en) | Method for enriching and recovering zinc by using rotary kiln | |
| CN102766171B (en) | Modified humic acid and application thereof in reducing roasting by manganese oxide ore pyrogenic method | |
| CN105907949A (en) | Novel process for comprehensively recovering nickel, cobalt and iron from laterite-nickel ore through low-temperature acidification and acidolysis | |
| CN113736940A (en) | Method for treating copper slag by rotary hearth furnace | |
| CN111910036B (en) | Method for co-producing high-quality synthesis gas by reducing vanadium titano-magnetite with biomass | |
| CN111850216B (en) | Method for co-producing synthesis gas by reducing vanadium-titanium magnetite through biomass | |
| CN104046879B (en) | Black ceramic material and preparation method thereof | |
| CN203238312U (en) | Continuous reducing and roasting device for manganese oxide ore |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |