CN101382384B - Molybdenum oxide roasting kiln - Google Patents
Molybdenum oxide roasting kiln Download PDFInfo
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- CN101382384B CN101382384B CN200810013018XA CN200810013018A CN101382384B CN 101382384 B CN101382384 B CN 101382384B CN 200810013018X A CN200810013018X A CN 200810013018XA CN 200810013018 A CN200810013018 A CN 200810013018A CN 101382384 B CN101382384 B CN 101382384B
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Abstract
The invention provides a kiln for roasting molybdenum oxide. One end of a kiln barrel is provided with a guiding barrel and a guiding sleeve; the outside of a combustion cavity of the kiln barrel is sleeved with a combustion cavity barrel; the front of the combustion cavity is provided with a flow distribution plate; a flow distribution port is respectively arranged at the ends of the flow distribution plate and the combustion cavity barrel; a backflow cavity is arranged at the flow distribution plate and the outside of the inner wall of the kiln barrel combustion cavity; a turning port and a turning plate are arranged between the backflow cavity and a reflow cavity; the reflow cavity is arranged between the kiln barrel and a backflow cavity barrel; and a roasting cavity is arranged at one end of the kiln barrel of the outside of the reflow cavity. All the barrel walls and the plates of the kiln are made of heat-resistant steel plates. The kiln has turning and reflow structure and forms a plurality of cavities, thus being characterized by high heat utilization ratio and light, short and hard ring-forming of the kiln, having good energy saving and environment protection and being applicable to the application of roasting the molybdenum oxide.
Description
Technical field
The present invention is to provide the device of the roasting of molybdenum oxide, specifically molybdenum oxide roasting kiln.
Background technology
Molybdenum concntrate becomes molybdenum oxide through after the roasting, could further extract the molybdenum salt of solubility, and then smelting becomes molybdenum or its alloy.Since nearly 50 years, the calcining kiln of home and abroad molybdenum oxide adopts two kinds of structures basically.The one, pass the traditional reflective kiln come from the former Soviet Union, directly use coal to be fuel, it is low to adopt this kiln to carry out the roasting yield of molybdenum oxide, and labor strength is big, high-temperature operation, smoke contamination is serious, is the kiln form of cancellation restriction on present China policy.The 2nd, the straight barrel type rotary kiln that adopted in recent years, though more progressive to some extent than reflecting kiln, its kiln body weight (adopting fire-brick lined in the thorax), body of heater length, floor space are greatly, coordinative composition of equipments power is big, yield is low.Because this kiln adopts refractory brick as inner lining material, thereby easy sintering of furnace lining or fusing, and forms the slag circle easily on furnace lining.Behind the ring formation, need stop kiln cooling, artificial clear kiln on the furnace lining, cause about the stopping production first quarter moon, waste time and energy, influence is produced.This all has a strong impact on guaranteeing production capacity and raising yield.Simultaneously because that refractory brick takies furnace volume is big and increase the weight of body of heater, thereby equipment dynamic need big, the power consumption height.And the straight barrel type rotary kiln adopts the straight barrel type structure, and frontal drag is little, and heat insulation effect is bad, and fuel consumption is high relatively, and molybdenum concentrate dust easily flies upward.
Summary of the invention
In order to overcome the shortcoming of existing molybdenum oxide calcining kiln, the present invention proposes molybdenum oxide roasting kiln.This kiln body solves the technical problem of efficient, yield and the raising feature of environmental protection and energy saving by the multiple hearth and the mode of revolution roasting.
The scheme that technical solution problem of the present invention is adopted is: an end of kiln body tube is provided with guiding tube, on guiding tube, be provided with the guiding cover, the inwall of guiding tube and combustion barrel inwall are the tubular construction of one, wherein, the combustion barrel inwall that stretches into kiln body tube part constitutes the combustion chamber tube, be placed at the outside of kiln body tube combustion chamber, be provided with flow distribution plate in the combustion chamber front portion, end at flow distribution plate and combustion chamber tube is provided with diffluence pass, in the flow distribution plate and the chamber of backflowing in the arranged outside of kiln body tube combustion chamber inwall, anti-stream chamber portion is made of anti-stream chamber tube, and between anti-stream chamber and back cavity, be provided with the mouth of turning back, in mouthful outside of turning back the plate of turning back is installed, is provided with back cavity at kiln body tube and anti-stream between the tube of chamber, kiln body tube one end in the back cavity outside is provided with baking cavity.
Kiln body tube, guiding tube, guiding cover, combustion chamber tube, flow distribution plate, instead flow the chamber tube, the plate of turning back is made by heat-resisting steel sheet and plate.
Thermal source adopts coal gas or other combustible gas.
Good effect: because kiln body of the present invention has the return-flow structure of turning back, form a plurality of cavitys, have the advantages that heat utilization efficiency height, kiln body are light, short, be difficult for ring formation.Environmental protection and energy saving is good.Suit in the molybdenum oxide roasting, to use.
Description of drawings
Fig. 1 is kiln body barrel structure figure of the present invention
Among the figure, 1. kiln body tube, 2. guiding tube, 2.1. guides cover, 3. combustion chamber, 3.1. combustion chamber tube, 3.2. diffluence pass, 4. flow distribution plate, the chamber of 5. backflowing, the anti-chamber tube that flows of 5.1., the 5.2. mouth of turning back, the plate of 6. turning back, 7. back cavity, 8. baking cavity.
The specific embodiment
Kiln body tube two ends are installed on kiln head box and the kiln boot, and are the power rotation with the driving machine, constitute rotary kiln.In rotary kiln, add molybdenum concntrate and introduce fuel gas, heat molybdenum concntrate by fuel gas at rotary kiln internal combustion generation heat and make molybdenum transform into molybdenum oxide, realize oven dry, desulfurization and oxidation.Molybdenum oxide through roasting is convenient to molybdenum element is separated, and forms soluble molybdenum element, extracts molybdenum salt and molybdenum compound thereof through processing again, thereby isolates molybdenum.But the kiln body tube multistage of rotary kiln.
Because the conversion ratio and the recovery rate of the degree of molybdenum oxide roasting decision molybdenum are again because kiln structure determines its energy-saving and environmental protection performance.So the kiln structure and the method for operation are vital.
The present invention has designed molybdenum oxide rotary kiln body according to the conditional request of molybdenum oxide roasting and from the energy-saving and environmental protection angle.
According to shown in Figure 1, one end of kiln body tube 1 is provided with guiding tube 2, on guiding tube, be provided with guiding cover 2.1, the inwall of guiding tube and combustion barrel inwall are the tubular construction of one, wherein, the combustion barrel inwall that stretches into kiln body tube part constitutes combustion chamber tube 3.1, be placed at the outside of kiln body tube combustion chamber 3, be provided with flow distribution plate 4 in the combustion chamber front portion, end at flow distribution plate and combustion chamber tube is provided with diffluence pass 3.2, in the flow distribution plate and the chamber 5 of backflowing in the arranged outside of kiln body tube combustion chamber inwall, anti-stream chamber portion is made of anti-stream chamber tube 5.1, and is provided with the mouth of turning back between anti-stream chamber and back cavity, and a mouthful outside is equipped with the plate 6 of turning back turning back, be provided with back cavity 7 between the tube of chamber at kiln body tube and anti-stream, kiln body tube one end in the back cavity outside is provided with baking cavity 8.
Kiln body tube, guiding tube, guiding cover, combustion chamber tube, flow distribution plate, instead flow the chamber tube, the plate of turning back is made by heat-resisting steel sheet and plate.
Thermal source adopts coal gas.
Because fuel gas is moving by backflowing in multi-cavity body invagination, reach the effect of abundant burning and raising furnace temperature, improved the utilization ratio of fuel, also reduced the heat-loading capacity of each cylindrical shell simultaneously, increase the service life.Owing to adopt many coincident configurationses, improved the structural strength of kiln body tube, dwindled volume and length, reduced the consumption of manufactured materials, saved manufacturing cost.Owing to make kiln body tube with steel plate, volume is little, in light weight, compares with the rotary kiln of refractory brick liner, is difficult for ring formation, has reduced the number of times of clear kiln, has improved effect.
The course of work of the present invention and characteristics.
Install: kiln head box and kiln boot are fixed on the kiln seat, and kiln head box is connected with corollary equipment gas generator appendix.The kiln boot is connected with corollary equipment drying oven feeding pipe.
Kiln body tube is installed between kiln head box and the kiln boot, and the transmission device that the outer set gear ring of kiln body tube is made up of gearbox, variable-speed motor provides power for gear ring and drives the running of kiln body.
Use: in the kiln body, the molybdenum concntrate (MoS after the dehydration
2) put in the kiln body tube by the spiral boxhole and further to dewater, the molybdenum concntrate powder after the dehydration rotates by cylindrical shell, enters cylindrical shell and carries out the initial stage desulfurization, by screw propulsion material is sent into and is carried out desulfurization in mid-term and desulfurization in latter stage in the cylindrical shell.The molybdenum oxide that roasting is good enters the broken stage by the kiln hood boxhole.
The present invention adopts heat-resisting steels to make kiln body tube and deflector and each chamber wall liner, and is more in light weight than refractory brick liner, volume is little and be difficult for ring formation on kiln body liner, reduces maintenance and blowing out number of times.The Zigzag type multiple hearth furnace body structure that is adopted prolongs heated time than straight barrel type kiln, has improved fuel availability and yield.
Be characterized in through facts have proved:
1, because the kiln body is light, reduce the kiln body and rotated power consumption, driving power is little.Many thoraxes of Zigzag type structure has shortened the kiln body, and kiln hood heat energy is fully used, and has reduced fuel consumption.
2, the kiln body is short, reduces floor space, can be convenient utilize the soil and reduce the infrastructure project cost.
3, heat-resisting steels kiln body has solved sintering and ring formation problem, the rate of recovery height of molybdenum oxide.Have economy, environmental protection, energy-saving advantages.Reduce the roasting cost simultaneously, alleviated labor strength, reduced the post personnel.
Claims (1)
1. molybdenum oxide roasting kiln, it is characterized in that: an end of kiln body tube (1) is provided with guiding tube (2), on guiding tube, be provided with guiding cover (2.1), the inwall of guiding tube and combustion barrel inwall are the tubular construction of one, wherein, the combustion barrel inwall that stretches into kiln body tube part constitutes combustion chamber tube (3.1), be placed at the outside of kiln body tube combustion chamber (3), be provided with flow distribution plate (4) in the combustion chamber front portion, be provided with diffluence pass (3.2) in the end of flow distribution plate and combustion chamber tube, in the flow distribution plate and the chamber (5) of backflowing in the arranged outside of kiln body tube combustion chamber inwall, anti-stream chamber portion is made of anti-stream chamber tube (5.1), and is provided with the mouth of turning back between anti-stream chamber and back cavity, and a mouthful outside is equipped with the plate of turning back (6) turning back, be provided with back cavity (7) between the tube of chamber at kiln body tube and anti-stream, kiln body tube one end in the back cavity outside is provided with baking cavity (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810013018XA CN101382384B (en) | 2008-08-29 | 2008-08-29 | Molybdenum oxide roasting kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810013018XA CN101382384B (en) | 2008-08-29 | 2008-08-29 | Molybdenum oxide roasting kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101382384A CN101382384A (en) | 2009-03-11 |
| CN101382384B true CN101382384B (en) | 2011-10-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810013018XA Expired - Fee Related CN101382384B (en) | 2008-08-29 | 2008-08-29 | Molybdenum oxide roasting kiln |
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| Country | Link |
|---|---|
| CN (1) | CN101382384B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818449B (en) * | 2012-09-13 | 2014-05-21 | 伍耀明 | Vacuum rotary kiln and application process thereof |
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2008
- 2008-08-29 CN CN200810013018XA patent/CN101382384B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101382384A (en) | 2009-03-11 |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20130829 |