CN203021626U - Manganese oxide reduction system for internal-heating type rotary kiln - Google Patents
Manganese oxide reduction system for internal-heating type rotary kiln Download PDFInfo
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- CN203021626U CN203021626U CN 201220744867 CN201220744867U CN203021626U CN 203021626 U CN203021626 U CN 203021626U CN 201220744867 CN201220744867 CN 201220744867 CN 201220744867 U CN201220744867 U CN 201220744867U CN 203021626 U CN203021626 U CN 203021626U
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Abstract
The utility model discloses a manganese oxide reduction system for an internal-heating type rotary kiln. The manganese oxide reduction system comprises a preheating-drying kiln, the internal-heating type rotary kiln, a powder-spraying type combustor, a water-cooling conveyer, and a desulfuration and dust removal tower, wherein the preheating-drying kiln, the internal-heating type rotary kiln, the powder-spraying type combustor and the water-cooling conveyer are slantwise connected in sequence, the preheating-drying kiln is the charge end of the system, and the water-cooling conveyer is the discharge end of the system; and the desulfuration and dust removal tower is connected to the charge end of the preheating-drying kiln via a fan and a pipeline. The waste residues generated by reducing manganese oxide ores by virtue of the method disclosed by the utility model to produce electrolytic manganese metal are greatly reduced, thus laying the foundation for energy conservation and emission reduction in the industry; and with the adoption of a novel internal-heating type roasting reduction technology, energy consumption is reduced, process control indexes are accurate, production is stable, reduction rate is up to more than 95%, mechanization degree is high, capacity is high, the requirement of mass production is adapted, process continuity is strong, and special requirements on reducing agent coal and combustion coal are avoided.
Description
Technical field
The utility model relates to a kind of internally heated type rotary kiln reduction-oxidation manganese system,
Background technology
Because natural manganese oxide ore (MnO
2, Mn
2O
3, Mn
3O
4Mixing) it can not be directly and the sulfuric acid generation manganous sulfate that reacts, therefore, all can not directly use in the industries such as electrolytic metal Mn, electrolytic manganese dioxide, chemical manganese bioxide and sulfuric acid acid manganese.If must being reduced into MnO with it with a kind of method, the words of use can use.Simultaneously again because the manganese in the epigeosphere earth's crust is to exist with the oxidation state situation more than 60%.The Manganese Ore Grade of this oxidation state is higher, and whole world steel industry is all to reenter steel melting furnace after producing the work in-process such as ferromanganese, silicomanganese with the method that this ore reduces by blast-furnace smelting.
Also there have been a lot of people's researchs and test to want manganese oxide ore is used in the production of highly purified electrolytic manganese and electrolytic manganese dioxide, chemical manganese bioxide and high purity manganese sulfate since nearly half world.All methods are summed up following two large classes:
The first kind is pyrogenic process: its reduction principle is: 2MnO
2+ C====2MnO+CO
2↑ Mn
2O
3+ C====2MnO+CO
2↑ Mn
3O
4+ CO====3MnO+CO
2↑
1, heap roasting, burnt in a heap lighting a fire after manganese ore and coal mixing exactly, this method reduction ratio is low again, and labour intensity is large, and is seriously polluted, is eliminated already; 2, reflection oven process, this method is also prohibited at present and has been used; 3, blast furnace process, electric furnace process, this is the present normally used method of manganese alloy; 4, Microwave reduction method, present this method also in test also have a lot of technological difficulties to overcome; 5, shaft furnace burning reduction method, this method kind is a lot, and the vertical furnace of similar calcined lime is arranged, and the tower type rotary grate formula stove of similar producer gas generator is arranged; The standpipe stove is arranged; Also has the boiling roaster method.6, the horizontal stove that is different from reverberatory furnace.Here also have a variety of: sliding type ladder step kiln, chain type roasting kiln, rotary kiln; Rotary kiln divides again external-heating revolving kiln, internal heat type rotary kiln, single thorax and many thoraxes formula rotary kiln etc.
Equations of The Second Kind is exactly wet method: the gordian technique of wet reducing is exactly the selection of reductive agent, the technology controlling and process in reduction process.For manganese oxide is reduced into bivalent manganese with the value Mn of manganese oxide ore in leaching process, just just must add reductive agent can reach the purpose of reduction under certain reductive condition.
At present the most frequently used is exactly to use MnO
2The ore deposit adds sulfurous iron ore leaches with steam heating in sulphuric acid soln, so-called one, two ore deposit method that Here it is, and this method is applied on a manganous sulfate production line on emerging farm, Guangxi the seventies in last century, and its reaction principle is:
3MnO
2+FeS
2+2SO
4 --==>2MnSO
4+MnS
2O
6+Fe
+++
The method is used more successfully at electrolysis plant of Yunnan mountain of papers at present.
In addition, the somebody uses SO
2As reductive agent with MnO
2Ore reduces produces manganese sulfate solution, reaction principle: MnO
2+ SO
2=MnSO
4Also useful glucose adds that reductase enzyme reduces MnO as reductive agent
2The ore deposit generates manganous sulfate with sulfuric acid leaching again.This is also to be used to produce manganous sulfate.Only had for two one steps of ore deposits beyond the large-scale production line of electrolytic manganese is applied but up to the present produce electrolytic manganese with wet reducing, additive method is all groped in process in test.Wet reducing has the problem of several keys to can not get solving: 1. SO
2It is exactly that the problem of acid balance can't resolve that method is produced electrolytic manganese.2. reduction rate is slow, efficient is low can't produce greatly.3. the reductive agent that uses due to wet method sees in impurity and reductive agent itself impact and the negative interaction that electrolysis workshop section brings is difficult to solution, treatment and finishing section technical process more complicated, and processing requirement is higher.Comprising two ore deposit single stage method, these problems are also arranged, so the wet reducing method does not also have spread at present.Wet method also has an important problem to be difficult to solve simultaneously, can only use exactly the MnO of oxygenizement
2, and to Mn
2O
3And Mn
3O
4Just dying.
Therefore, pass through also best method or the pyrogenic process of original production electrolytic metal Mn, electrolytic manganese dioxide and manganese salt with manganese oxide ore.Because pyrogenic process possesses: reductive agent is both cheap, originates extensive again; Reduction rate is fast; Reduction ratio is high; Can streamline operration and be convenient to the many merits of scale operation.
Since 2005, we analyzed and researched to the shaft furnace in pyrometallurgical smelting and horizontal revolving kiln: the result of study 1. advantage of shaft furnace is simple in structure, and is easy and simple to handle.Shortcoming is the kiln external heat, and heat utilization rate is low, the granularity that in kiln, ore must be certain, otherwise be unfavorable for CO
2Gas discharging; The single tube diameter is unfavorable for too greatly heat transmission, and the centre reduction ratio reduces; Ore grain size is unfavorable reduction too greatly also.The single device production capacity is low, can not serialization be not suitable with large production requirement.Waste gas and the dirt of reduction tube top are difficult for collection and treatment.2. the advantage of rotary kiln is apparent in view: reductive agent is cheap, wide material sources; Reduction rate is fast, and reduction ratio is high; The streamline operration automatic production can reduce labour intensity again, is adapted to large requirement of producing.But its existing problems are also many: heating in kiln, and the more difficult control of temperature, furnace charge is easily stammered, and in kiln, oxygen reduction part being difficult to guarantees.Therefore, do not use the rotary kiln of heating in kiln both at home and abroad, all adopt the method for kiln external heat.Yet the consumption of the kiln external heat energy is higher.The reduction cost is higher.Equipment at high temperature moves fragile for a long time.
The utility model content
The internally heated type rotary kiln reduction-oxidation manganese system that provides a kind of production cost low is provided the purpose of this utility model.
This reducing manganese oxide by internal-heat rotary kiln system that the utility model provides, it comprises pre-heating drying kiln, internal heat type rotary kiln, spraying type burner, water-cooled transfer roller, desulfurized dust collection column; Pre-heating drying kiln, internal heat type rotary kiln, spraying type burner, water-cooled transfer roller tilt to connect successively, and the pre-heating drying kiln is the feed end of this system, and the water-cooled transfer roller is the discharge end of this system; Desulfurized dust collection column is connected in the feed end of pre-heating drying kiln by blower fan and pipeline.
Described spraying type burner is multiple wind duct combusting device, comprise whirlwind-type burner, oil gas spray chamber, spraying of ruel chamber, high pressure air compartment, pre-hot air chamber, track, described each chamber is communicated in respectively described whirlwind-type burner by interior arrangement, rear end separate, each chamber outward successively, and coaxial to medullary ray with the whirlwind-type burner; Described whirlwind-type burner is connected with described track by pulley with the integral body that each chamber forms.
The length of described oil gas spray chamber, spraying of ruel chamber, high pressure air compartment, pre-hot air chamber shortens successively, and the downside front end of each chamber has respectively gas inlet, fuel and pressurized air mixture inlet, compressed air inlet, pre-hot blast entrance; The front end of described oil gas spray chamber is useful on the spray bar of igniting.
The axial centre of described whirlwind-type burner has the convergent taper hole that is communicated with described oil gas spray chamber; Be evenly equipped with S shape rib in the zone that corresponding described oil gas spray chamber and spraying of ruel chamber surround, in the zone that corresponding described other each chamber surrounds, dislocation is evenly equipped with straight rib.
Described water-cooled transfer roller is the internal screw transfer roller, comprises cooling tank, metallic cylinder, and the inwall of metallic cylinder has screw-blade, and cooling tank is positioned at the top of metallic cylinder.
Described cooling tank is the U-lag of opening, and there is jagged bleeder its parallel upper end, two side; The front and rear part of described metallic cylinder outer wall has support roller, interposition to be equipped with transmitting gear; The front end of described metallic cylinder has opening for feed, rear end that the discharging card is arranged.
Described desulfurized dust collection column is the rotary moisture film desulfurized dust collection column of adverse current, comprise the tower body that adopts plastic production, the bottom of tower body has inlet plenum, upper end that vent stack is arranged, top in tower body has spray equipment, multilayer to divide water sieve plate and tilting spiral board, the below of dividing the water sieve plate to be positioned at spray equipment, the tilting spiral board is between minute water sieve plate and inlet plenum.
The diameter of the corresponding described spray equipment of described tower body and minute water sieve section is greater than the diameter of its hypomere, and the tilting spiral board of tower body inwall is lined with acid-proof ceramic tile with hypomere, and described inlet plenum tangentially is connected in this section along tower body; The axial centre of described tower body is useful on the pillar stiffener of fixing described tilting spiral board.
The water sieve plate was evenly equipped with tapping hole in described minute.
The shell of described internal heat type rotary kiln is jacket type structure, and its downside has adapter to be connected with the pre-hot blast entrance of described spraying type burner.
The utility model is compared with prior art, has the following advantages:
Adopt drying kiln and the conjuncted form of rotary kiln, the waste heat that takes full advantage of rotary kiln is dried also preheating with manganese oxide ore and reductive agent, has not only saved the energy, has also increased the production capacity of rotary kiln.
Four air channels of multi-air channel pulverized coal burner and pulley matching track structure for igniting, adjust the coal dust feeding coal with effective control kiln temperature, adjust the heating position, guarantee that the reducing atmosphere in kiln plays a key effect, also provide assurance for the utilization of low grade coal simultaneously.
Water-cooled internal screw transfer roller is carried the raw material after high temperature reduction in the cylinder of sealing, guarantee that not only it obtains cooling fast under closed state, guarantees that also it is no longer sent into next workshop section by oxidation again and carry out ball milling.
The rotary moisture film desulfurized dust collection column of adverse current is in the situation that there is water vapor, can dedusting, again can desulfurization.The manganese dioxide powder that contains in this equipment utilization dust and SO
2Redox reaction occurs and generates MnSO in gas in moisture film
4And MnS
2O
6, MnS
2O
6May generate MnSO again at higher temperature
4And SO
2, SO
2Again and MnO
2Reaction is in the situation that repeatedly circulation just only has MnSO
4Exist.Regularly with after circulation fluid filtration, contain MnSO
4Liquid enter liquid circulation in the electrolytic manganese production process, filter residue enters chemical combination workshop section and participates in chemical combination.
With the utility model method reduction-oxidation manganese ore, not only replace manganese carbonate ore and produce electrolytic manganese, and make China the Sustainable development of electrolytic manganese industry, because, the manganese content of manganese oxide ore is all higher than manganese carbonate ore, obtained significantly reducing with producing the waste residue that electrolytic metal Mn produces after the manganese oxide ore roasting reduction, institute thinks that the energy-saving and emission-reduction of solution industry lay a good foundation.And owing to adopting internal heat type roasting reduction new technology Energy Intensity Reduction, technology controlling and process index accurate, produce stable, reduction ratio is up to more than 95%, and mechanization degree is high, production capacity is high, adapt to large requirement of producing, the technique continuity is strong, reductive agent coal and coal combustion are not had special requirement.
Description of drawings
Fig. 1 is each equipment connection schematic diagram of the utility model.
Fig. 2 is the structural representation of spraying type burner in Fig. 1.
Fig. 3 is that schematic diagram is looked on the left side of Fig. 2.
Fig. 4 is the structural representation of water-cooled transfer roller in Fig. 1.
Fig. 5 is that A in Fig. 4 is to schematic diagram.
Fig. 6 is the structural representation of desulfurized dust collection column in Fig. 1.
Fig. 7 is the A-A cross-sectional schematic in Fig. 6.
Fig. 8 is the B-B cross-sectional schematic in Fig. 6.
Fig. 9 is the schematic top plan view of tilting spiral board.
Embodiment
As shown in Figure 1, this reducing manganese oxide by internal-heat rotary kiln system that the utility model provides, it comprises screw feeder 1, kiln hood kitchen range 2, pre-heating drying kiln 3, internal heat type rotary kiln 4, kiln tail kitchen range 5, spraying type burner 6, water-cooled transfer roller 7, the ball mill 8 that tilts to connect successively.Desulfurized dust collection column 9 is connected in the feed end of pre-heating drying kiln 3 by vacuum fan 10 and pipeline.The mounting height of screw feeder 1 is greater than the mounting height of ball mill 8, and the mounting height of desulfurized dust collection column 9 is higher than the mounting height of screw feeder 1.Pre-heating drying kiln 3 and internal heat type rotary kiln 4 be end to end joining together when mounted, the middle sliding sealing device that adopts.
Be multiple wind duct combusting device as Fig. 2, Fig. 3 spraying type burner 6, comprise whirlwind-type burner 61, oil gas spray chamber 62, spraying of ruel chamber 63, high pressure air compartment 64, pre-hot air chamber 65, track 66, each chamber is welded by interior arrangement outward, rear end difference whirlwind-type burner 61 separate, each chamber successively, and coaxial to medullary ray with whirlwind-type burner 61; Whirlwind-type burner 1 is connected with track 66 by pulley 67, suspension rod 68 with the integral body that each chamber forms.The length of oil gas spray chamber 62, spraying of ruel chamber 63, high pressure air compartment 64, pre-hot air chamber 65 shortens successively, and the downside front end of each chamber has respectively gas inlet 621, fuel and pressurized air mixture inlet 631, compressed air inlet 641, pre-hot blast entrance 651; The front end of oil gas spray chamber 62 is useful on the spray bar 622 of igniting.The axial centre of whirlwind-type burner 61 has the convergent taper hole 611 that is communicated with oil gas spray chamber 62; Be evenly equipped with S shape rib 612 in the zone that corresponding oil gas spray chamber 62 and spraying of ruel chamber 63 surround, in the zone that corresponding other each chamber surrounds, dislocation is evenly equipped with straight rib 613.S shape rib 612 can make air-flow evenly and produce spiral, and straight rib 613 can make air-flow more even, makes fuel combustion efficiency better.The shell of internal heat type rotary kiln 4 is jacket type structure, and its downside has adapter 41 to be connected with the pre-hot blast entrance 651 of spraying type burner 6.
As shown in Figure 4, water-cooled transfer roller 7 is the internal screw transfer roller, comprises cooling tank 71, metallic cylinder 72, and the inwall of metallic cylinder 72 has screw-blade 73, and cooling tank 71 is fixed in the top of metallic cylinder 72 by support 76.Cooling tank 71 is the U-lag of opening, and there is jagged bleeder 711 its parallel upper end, two side; The front and rear part of metallic cylinder 72 outer walls has support roller 74, interposition to be equipped with transmitting gear 75; The front end of metallic cylinder 72 has opening for feed 721, rear end that discharge port 722 is arranged.Metallic cylinder 72 the below water leg 77 is arranged.
As extremely shown in Figure 7 in Fig. 5, desulfurized dust collection column 9 is the rotary moisture film desulfurized dust collection column of adverse current, comprise the tower body 91 that adopts plastic production, the bottom of tower body 91 has inlet plenum 95, upper end that vent stack 96 is arranged, top in tower body 91 has spray equipment 94, multilayer to divide water sieve plate 93 and tilting spiral board 92, the below of dividing water sieve plate 93 to be positioned at spray equipment 94, tilting spiral board 92 is between minute water sieve plate 93 and inlet plenum 95.The diameter that the corresponding spray equipment of tower body 91 94 and minute water sieve plate are 93 sections is greater than the diameter of its hypomere, and the tilting spiral board 92 of tower body 91 inwalls is lined with acid-proof ceramic tile 97 with hypomere, and inlet plenum 95 tangentially is connected in this section along tower body 91; The axial centre of tower body 91 is useful on the pillar stiffener 98 of constant tilt formula spiral board 92.Tilting spiral board 2 adopts acidproof numb stone cutting to form.Divide water sieve plate 93 to be evenly equipped with tapping hole 931; The pitch angle of tilting spiral board 92 and horizontal plane is between the 20-25 degree.
Principle of work is as follows: manganese oxide with after the coal dust of suitable proportion mixes, send into pre-heating drying kiln 3 by worm conveyor 1, automatically flow in internal heat type rotary kiln 4 after oven dry and preheating, recycling spraying type burner 6 reaches heat temperature raising in its kiln the temperature of manganese oxide ore reduction and keeps certain reductive condition from the discharge end of internal heat type rotary kiln 4 is reverse, make manganese oxide ore continuously reduce manganese oxide ore cooling after interior will the reduction of rear automatic inflow water-cooled transfer roller 7, and after flowing directly into ball mill 8 polishings, electrolytic solution is produced in the productions of electrolysis manganese.Be furnished with vacuum fan 10 at the feed end of pre-heating drying kiln 3, take waste gas and the dust in it away and send in desulfurized dust collection column 9, remove dust and SO
2Gas, rear discharging up to standard, whole flow process is accomplished without any letup.
The utility model goes for granularity less than the discarded ore deposit of the manganese oxide below 5mm, goes back raw coal or fuel coal dust without particular requirement to what the fuel agent was adopted.
Claims (10)
1. internally heated type rotary kiln reduction-oxidation manganese system, it is characterized in that: it comprises pre-heating drying kiln, internal heat type rotary kiln, spraying type burner, water-cooled transfer roller, desulfurized dust collection column; Drying kiln, internal heat type rotary kiln, spraying type burner, water-cooled transfer roller tilt to connect successively, and the pre-heating drying kiln is the feed end of this system, and the water-cooled transfer roller is the discharge end of this system; Desulfurized dust collection column is connected in the feed end of pre-heating drying kiln by blower fan and pipeline.
2. internally heated type rotary kiln reduction-oxidation manganese as claimed in claim 1 system, it is characterized in that: described spraying type burner is multiple wind duct combusting device, comprise whirlwind-type burner, oil gas spray chamber, spraying of ruel chamber, high pressure air compartment, pre-hot air chamber, track, described each chamber is communicated in respectively described whirlwind-type burner by interior arrangement, rear end separate, each chamber outward successively, and coaxial to medullary ray with the whirlwind-type burner; Described whirlwind-type burner is connected with described track by pulley with the integral body that each chamber forms.
3. internally heated type rotary kiln reduction-oxidation manganese as claimed in claim 2 system, it is characterized in that: the length of described oil gas spray chamber, spraying of ruel chamber, high pressure air compartment, pre-hot air chamber shortens successively, and the downside front end of each chamber has respectively gas inlet, fuel and pressurized air mixture inlet, compressed air inlet, pre-hot blast entrance; The front end of described oil gas spray chamber is useful on the spray bar of igniting.
4. internally heated type rotary kiln reduction-oxidation manganese as claimed in claim 2 system, it is characterized in that: the axial centre of described whirlwind-type burner has the convergent taper hole that is communicated with described oil gas spray chamber; Be evenly equipped with S shape rib in the zone that corresponding described oil gas spray chamber and spraying of ruel chamber surround, in the zone that corresponding described other each chamber surrounds, dislocation is evenly equipped with straight rib.
5. internally heated type rotary kiln reduction-oxidation manganese as claimed in claim 1 system, it is characterized in that: described water-cooled transfer roller is the internal screw transfer roller, comprise cooling tank, metallic cylinder, the inwall of metallic cylinder has screw-blade, and cooling tank is positioned at the top of metallic cylinder.
6. internally heated type rotary kiln reduction-oxidation manganese as claimed in claim 5 system, it is characterized in that: described cooling tank is the U-lag of opening, there is jagged bleeder its parallel upper end, two side; The front and rear part of described metallic cylinder outer wall has support roller, interposition to be equipped with transmitting gear; The front end of described metallic cylinder has opening for feed, rear end that the discharging card is arranged.
7. heating revolving kiln reduction-oxidation manganese system of internally heated type rotary kiln reduction-oxidation manganese as claimed in claim 1 system, it is characterized in that: described desulfurized dust collection column is the rotary moisture film desulfurized dust collection column of adverse current, comprise the tower body that adopts plastic production, the bottom of tower body has inlet plenum, upper end that vent stack is arranged, top in tower body has spray equipment, multilayer to divide water sieve plate and tilting spiral board, the below of dividing the water sieve plate to be positioned at spray equipment, the tilting spiral board is between minute water sieve plate and inlet plenum.
8. internally heated type rotary kiln reduction-oxidation manganese as claimed in claim 7 system, it is characterized in that: the diameter of the corresponding described spray equipment of described tower body and minute water sieve section is greater than the diameter of its hypomere, the tilting spiral board of tower body inwall is lined with acid-proof ceramic tile with hypomere, and described inlet plenum tangentially is connected in this section along tower body; The axial centre of described tower body is useful on the pillar stiffener of fixing described tilting spiral board.
9. internally heated type rotary kiln reduction-oxidation manganese as claimed in claim 7 system, it is characterized in that: the water sieve plate was evenly equipped with tapping hole in described minute.
10. internally heated type rotary kiln reduction-oxidation manganese as claimed in claim 4 system, it is characterized in that: the shell of described internally heated type rotary kiln is jacket type structure, its downside has to take over and is connected with the pre-hot blast entrance of described spraying type burner.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220744867 CN203021626U (en) | 2012-12-31 | 2012-12-31 | Manganese oxide reduction system for internal-heating type rotary kiln |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220744867 CN203021626U (en) | 2012-12-31 | 2012-12-31 | Manganese oxide reduction system for internal-heating type rotary kiln |
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|---|---|
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|---|---|---|---|
| CN 201220744867 Expired - Fee Related CN203021626U (en) | 2012-12-31 | 2012-12-31 | Manganese oxide reduction system for internal-heating type rotary kiln |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102978382A (en) * | 2012-12-31 | 2013-03-20 | 湘西自治州德邦锰业有限责任公司 | Manganese oxide reduction system of internal heating type rotary kiln |
| CN105333727A (en) * | 2015-11-16 | 2016-02-17 | 刘兴良 | Continuous efficient rotary kiln |
| CN106524139A (en) * | 2016-12-26 | 2017-03-22 | 冯军 | Burner of boiler and boiler |
| CN108373173A (en) * | 2018-04-17 | 2018-08-07 | 广西锰华新能源科技发展有限公司 | A kind of dry oxidation manganese production technology |
-
2012
- 2012-12-31 CN CN 201220744867 patent/CN203021626U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102978382A (en) * | 2012-12-31 | 2013-03-20 | 湘西自治州德邦锰业有限责任公司 | Manganese oxide reduction system of internal heating type rotary kiln |
| CN102978382B (en) * | 2012-12-31 | 2014-04-02 | 湘西自治州德邦锰业有限责任公司 | Manganese oxide reduction system of internal heating type rotary kiln |
| CN105333727A (en) * | 2015-11-16 | 2016-02-17 | 刘兴良 | Continuous efficient rotary kiln |
| CN106524139A (en) * | 2016-12-26 | 2017-03-22 | 冯军 | Burner of boiler and boiler |
| CN108373173A (en) * | 2018-04-17 | 2018-08-07 | 广西锰华新能源科技发展有限公司 | A kind of dry oxidation manganese production technology |
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