CN214620594U - Molybdenum oxide roasting system - Google Patents
Molybdenum oxide roasting system Download PDFInfo
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- CN214620594U CN214620594U CN202120368504.4U CN202120368504U CN214620594U CN 214620594 U CN214620594 U CN 214620594U CN 202120368504 U CN202120368504 U CN 202120368504U CN 214620594 U CN214620594 U CN 214620594U
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Abstract
The utility model belongs to the technical field of the molybdenum is smelted, the utility model discloses a molybdenum oxide roasting system, including first rotary kiln, first heat exchanger, hot air distributor, the second rotary kiln, second heat exchanger and dry bed, first rotary kiln one end links to each other with the second heat exchanger, the first rotary kiln other end links to each other with the second rotary kiln, first heat exchanger is established on first rotary kiln, hot air distributor's one end links to each other with first heat exchanger, hot air distributor's the other end links to each other in first rotary kiln and second rotary kiln respectively, the one end of second heat exchanger links to each other with first rotary kiln, the second heat exchanger other end links to each other with the dry bed. The utility model discloses a molybdenum oxide roasting system can be with the whole cyclic utilization of heat, reduce the energy consumption and reduce, improve the high and molybdenum oxide's of degree of automation solubility rate.
Description
Technical Field
The utility model relates to a molybdenum smelting technical field, concretely relates to molybdenum oxide roasting system.
Background
At present, a flash dryer and an internal heating rotary kiln are generally adopted for roasting molybdenum concentrate, the molybdenum concentrate is added into the flash dryer through a feeder, the flash dryer is provided with an independent heat source, an indirect heat exchange hot blast stove is generally adopted to provide heat energy required by drying, and the defects that the energy consumption is high, the coal consumption of the hot blast stove is large, the roasting cost of the molybdenum concentrate is greatly increased, and the energy is wasted are overcome.
In the related technology, the rotary kiln is subjected to energy-saving transformation, and heat generated in a high-temperature area of the rotary kiln is used for a low-temperature area, so that part of heat is saved. For example, in the related art, a molybdenum concentrate self-heating roasting device is provided, a heat exchanger is arranged on a rotary kiln, the heat of the outer part of the middle section of the rotary kiln body is conducted to a desulfurization low-temperature region of the kiln head of the rotary kiln, the temperature field of the rotary kiln is changed, and energy is saved.
In the related technology, a rotary kiln with a waste heat utilization system for roasting molybdenum oxide is also provided, and the kiln type that hot air returns to the rotary kiln after heat exchange of roasting tail gas is utilized. However, the research of the inventor of the present application finds that the recovery of only partial heat of the roasting of the molybdenum concentrate cannot realize the complete recycling of energy, and the related technology does not form continuous production, has low automation level and efficiency, and produces molybdenum oxide with low solubility rate in the related technology.
Disclosure of Invention
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the embodiment of the utility model provides a heat is whole cyclic utilization, energy consumption reduction, high molybdenum oxide baking system of degree of automation, can still improve molybdenum oxide's solubility.
According to the utility model discloses molybdenum oxide baking system, include: the first rotary kiln is provided with a first feeding hole, a first flue gas outlet, a first hot air inlet, a first flue gas inlet and a first discharging hole; the first heat exchanger is arranged on the first rotary kiln and is provided with a first heat exchange air inlet and a first heat exchange hot air outlet; the hot air distributor is provided with a hot air distribution air inlet, a first hot air distribution outlet and a second hot air distribution outlet, the hot air distribution air inlet is connected with the first heat exchange hot air outlet, and the first hot air distribution outlet is connected with the first hot air inlet; the second rotary kiln is provided with a second feeding hole, a second flue gas outlet, a second hot air inlet and a second discharge hole, the second feeding hole is connected with the first discharge hole, the second flue gas outlet is connected with the first flue gas inlet, and the second hot air inlet is connected with the second hot air distribution outlet; the second heat exchanger is provided with a second heat exchange smoke inlet, a second heat exchange smoke outlet, a second heat exchange air inlet and a second heat exchange air outlet, and the second heat exchange smoke inlet is connected with the first smoke outlet; and the drying bed is provided with a drying feed inlet, a drying hot air inlet and a drying discharge port, the drying hot air inlet is connected with the second heat exchange air outlet, and the drying discharge port is connected with the first feed inlet.
According to the utility model discloses molybdenum oxide baking system can be with the whole cyclic utilization of heat, reduce the energy consumption, improve degree of automation, can still improve molybdenum oxide's soluble rate.
In some embodiments, the molybdenum oxide roasting system further comprises a first dust collector, the first dust collector is provided with a first dust collecting inlet, a dry tail gas outlet and a first dust collecting outlet, the first dust collecting inlet is connected with the dry discharge hole, and the first dust collecting outlet is connected with the first feed inlet.
In some embodiments, the molybdenum oxide roasting system further comprises a second dust collector, the second dust collector is provided with a second dust collection inlet, a third flue gas outlet and a second dust collection outlet, the second dust collection inlet is connected with the second heat exchange flue gas outlet, and the second dust collection outlet is connected with the first dust collection inlet.
In some embodiments, the first dust collector and the second dust collector are both bag collectors.
In some embodiments, the first feed port and the first flue gas outlet are adjacent a first end of the rotary kiln, and the first discharge port, the first hot air inlet, and the first flue gas inlet are adjacent a second end of the rotary kiln.
In some embodiments, the second feed inlet, the second flue gas outlet are adjacent to a first end of the second rotary kiln, and the second hot air inlet and the second discharge outlet are adjacent to a second end of the second rotary kiln.
In some embodiments, the first heat exchanger includes a plurality of heat exchange tubes, and the heat exchange tubes are attached to an outer wall of the first rotary kiln in a circumferential direction of the first rotary kiln and located in the middle of the first rotary kiln in an axial direction of the first rotary kiln.
In some embodiments, the molybdenum oxide roasting system further comprises a first fan and a second fan, an air outlet of the first fan is connected with the first heat exchange air inlet, and an air outlet of the second fan is connected with the second heat exchange air inlet.
In some embodiments, the molybdenum oxide roasting system further comprises an acid making subsystem, and the acid making subsystem is connected with the third flue gas outlet.
In some embodiments, the molybdenum oxide solubility discharged from the second discharge outlet is greater than 90%.
Drawings
Fig. 1 is a schematic structural diagram of a molybdenum oxide roasting system according to an embodiment of the present invention.
Reference numerals:
first rotary kiln 1
A first feeding hole 101, a first flue gas outlet 102, a first hot air inlet 103, a first flue gas inlet 104, a first discharging hole 105,
the first heat exchanger (2) is provided with a heat exchanger,
a first heat exchange air inlet 201, a first heat exchange hot air outlet 202,
the hot air distributor 3 is provided with a hot air distributor,
a hot air distribution inlet 301, a first hot air distribution outlet 302, a second hot air distribution outlet 303,
a second rotary kiln 4 is provided, which,
a second feed port 401, a second flue gas outlet 402, a second hot air inlet 403, a second discharge port 404,
the second heat exchanger (5) is provided with a heat exchanger,
a second heat exchange flue gas inlet 501, a second heat exchange flue gas outlet 502, a second heat exchange air inlet 503, a second heat exchange air outlet 504,
the bed (6) is dried and,
a drying inlet 601, a drying hot air inlet 602, a drying outlet 603,
the first dust collector 7 is a dust collector,
a first dust collection inlet 701, a dry tail gas outlet 702, a first dust collection outlet 703, a third dust collection inlet 704,
the second dust collector 8 is a second dust collector,
a second dust-collecting inlet 801, a third flue gas outlet 802, a second dust-collecting outlet 803,
a first fan 9, a second fan 10, an acid making subsystem 11,
the high temperature crusher 12, the first crushing inlet 121, the first crushing outlet 122,
the cooler 13, the first cooling inlet 131, the first cooling outlet 132,
a conveyor 14, a hoist 15, a silo 16, a packer 17, a first feeder 18, a second feeder 19, and a bin pump 20.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
As shown in fig. 1, a molybdenum oxide roasting system according to an embodiment of the present invention includes a first rotary kiln 1, a first heat exchanger 2, a hot air distributor 3, a second rotary kiln 4, a second heat exchanger 5, and a drying bed 6.
The first rotary kiln 1 has a first feed port 101, a first flue gas outlet 102, a first hot air inlet 103, a first flue gas inlet 104 and a first discharge port 105. As shown in fig. 1, a first feeder 18 is further provided at the first feeding port 101. The first feeder 18 is capable of quantitatively feeding the material into the first rotary kiln 1.
The first heat exchanger 2 is arranged on the first rotary kiln 1, and the first heat exchanger 2 is provided with a first heat exchange air inlet 201 and a first heat exchange hot air outlet 202. It should be noted that the first heat exchanger 2 rotates along with the first rotary kiln 1, and the first heat exchanger 2 is disposed in the high-temperature zone of the first rotary kiln 1.
As shown in fig. 1, specifically, the first heat exchange air inlet 201 is arranged at the left end of the first heat exchanger 2, and the first heat exchange hot air outlet 202 is arranged at the right end of the first heat exchanger 2.
The hot air distributor 3 has a hot air distributing inlet 301, a first hot air distributing outlet 302 and a second hot air distributing outlet 303, the hot air distributing inlet 301 is connected to the first heat exchange hot air outlet 202, and the first hot air distributing outlet 302 is connected to the first hot air inlet 103.
The second rotary kiln 4 has a second feed port 401, a second flue gas outlet 402, a second hot air inlet 403 and a second discharge port 404, the second feed port 401 is connected to the first discharge port 105, the second flue gas outlet 402 is connected to the first flue gas inlet 104, and the second hot air inlet 403 is connected to the second hot air distribution outlet 303. As shown in fig. 1, a second feeder 19 is provided at the second feed port 401.
The second heat exchanger 5 is provided with a second heat exchange flue gas inlet 501, a second heat exchange flue gas outlet 502, a second heat exchange air inlet 503 and a second heat exchange air outlet 504, and the second heat exchange flue gas inlet 501 is connected with the first flue gas outlet 102.
The drying bed 6 is provided with a drying inlet 601, a drying hot air inlet 602 and a drying outlet 603, the drying hot air inlet 602 is connected with the second heat exchange outlet 504, and the drying outlet 603 is connected with the first inlet 101.
According to the utility model discloses molybdenum oxide roasting system, the heat conversion that first heat exchanger 2 produced first rotary kiln 1 is high temperature hot-blast, and divide into two the tunnel with high temperature hot-blast, get into again in first rotary kiln 1 and drive in the sulphur flue gas gets into second heat exchanger 5 after hot air distributor 3's distribution all the way, second heat exchanger 5 will contain hot-blast row that produces behind the sulphur flue gas heat transfer to drying bed 6 and be used for carrying out the drying to the molybdenum concentrate, another way gets into the degree of depth oxidation that is used for second rotary kiln 4 in the second rotary kiln 4 and maintains the heat balance in the second rotary kiln 4 after hot air distributor 3's distribution. Through the roasting of the first rotary kiln 1 and the second rotary kiln 4, the molybdenum oxide can be deeply oxidized, and the solubility of the molybdenum oxide is improved.
In some embodiments, the molybdenum oxide calcination system further comprises a first dust collector 7, the first dust collector 7 has a first dust collecting inlet 701, a dried tail gas outlet 702 and a first dust collecting outlet 703, the first dust collecting inlet 701 is connected with the dried discharge port 603, and the first dust collecting outlet 703 is connected with the first feed port 101.
As shown in fig. 1, specifically, the first dust outlet 703 is connected to the first feeder 18. The first feeder 18 can quantitatively convey the materials in the first dust collector 7 to the first rotary kiln 1, so that the roasting efficiency of the first rotary kiln 1 and the production quality of molybdenum oxide are improved.
In some embodiments, the molybdenum oxide calcination system further comprises a second dust collector 8, the second dust collector 8 has a second dust collection inlet 801, a third flue gas outlet 802, and a second dust collection outlet 803, the second dust collection inlet 801 is connected to the second heat exchange flue gas outlet 502, and the second dust collection outlet 803 is connected to the first dust collection inlet 701.
As shown in fig. 1, specifically, the first dust collector 7 may be further provided with a third dust collecting inlet 704, and the second dust collecting outlet 803 may be further connected to the third dust collecting inlet 704.
In some embodiments, the molybdenum oxide calcination system further includes a bin pump 20, a feed inlet of the bin pump 20 is connected to the second dust collecting outlet 803, a discharge outlet of the bin pump 20 is connected to the first dust collecting inlet 701, and of course, a discharge outlet of the bin pump 20 may also be connected to a third dust collecting inlet.
The utility model discloses molybdenum oxide baking system through setting up second dust collector 8, can handle the dust in the flue gas, reduces the pollution, through setting up storehouse pump 20, improves the conveying efficiency of dust in the flue gas, improves baking system's production efficiency.
In some embodiments, first dust collector 7 and second dust collector 8 are both bag collectors. It is to be understood that the kind of dust collector in the embodiment of the present application is not limited thereto, and may also be, for example, an electric dust collector, a wet dust collector, an electric bag dust collector, or a cyclone dust collector.
In some embodiments, the first feed port 101 and the first flue gas outlet 102 are adjacent to a first end of the first rotary kiln 1 (e.g., the left end of the first rotary kiln 1 shown in fig. 1), and the first discharge port 105, the first hot air inlet 103 and the first flue gas inlet 104 are adjacent to a second end of the rotary kiln (e.g., the right end of the first rotary kiln 1 shown in fig. 1).
In some embodiments, the second feed inlet 401, the second flue gas outlet 402 are adjacent to a first end of the second rotary kiln 4 (e.g., the left end of the second rotary kiln 4 shown in fig. 1), and the second hot air inlet 403 and the second discharge outlet 404 are adjacent to a second end of the second rotary kiln 4 (e.g., the right end of the second rotary kiln 4 shown in fig. 1).
In some embodiments, the first heat exchanger 2 comprises a plurality of heat exchange tubes, and the plurality of heat exchange tubes are attached to the outer wall of the first rotary kiln 1 along the circumferential direction of the first rotary kiln 1 and are located in the middle of the first rotary kiln 1 along the axial direction of the first rotary kiln 1.
As shown in fig. 1, a plurality of heat exchange pipes are arranged in parallel with each other, and the heat exchange pipes are arranged coaxially with the first rotary kiln 1, and the plurality of heat exchange pipes have the same size in the axial direction of the first rotary kiln 1.
The utility model discloses molybdenum oxide roasting system through setting up a plurality of heat exchange tubes, can improve heat exchange efficiency.
In some embodiments, the molybdenum oxide calcination system further includes a first fan 9 and a second fan 10, an air outlet of the first fan 9 is connected to the first heat exchanging air inlet 201, and an air outlet of the second fan 10 is connected to the second heat exchanging air inlet 503.
It should be noted that the first fan 9 is a variable frequency fan and generates an adjustable air volume, and it should be understood that the second fan 10 may also be a variable frequency fan and generates an adjustable air volume.
As shown in fig. 1, in particular, the first fan 9 may be directly connected to the first rotary kiln 1 and rotate together with the first rotary kiln 1, or may be provided on the ground and connected to the first rotary kiln 1 through a sliding seal ring.
It should be noted that, in order to maintain the heat balance of the roasting system and reduce the air entering the first rotary kiln 1, the air inlet end of the first fan 9 may be connected to an oxygen pipeline to increase the oxygen content in the hot air generated by the first rotary kiln 1 to 25% -30%.
In some embodiments, the molybdenum oxide calcination system further comprises an acid making subsystem 11, and the acid making subsystem 11 is connected to the third flue gas outlet 802.
The utility model discloses roasting system through establishing at system acid subsystem 11, can take off SO2 in the flue gas, reduces environmental pollution.
In some embodiments, the molybdenum oxide solubles discharged from second outlet 404 are greater than 90%.
In some embodiments, the molybdenum oxide calcination system further comprises a high temperature crusher 12, the high temperature crusher 12 is disposed between the first rotary kiln 1 and the second rotary kiln 4, and the high temperature crusher 12 comprises a first crushing inlet 121 and a first crushing outlet 122, the first crushing inlet 121 is connected to the first discharge port 105, and the first crushing outlet 122 is connected to the second feed port 401.
It should be noted that the high-temperature crusher 12 is disposed right below the first discharge port 105 and right above the second feed port 401, so as to realize the lowest conveying stroke and reduce the heat loss of the molybdenum oxide.
The utility model discloses molybdenum oxide roasting system through set up high temperature breaker 12 between first rotary kiln 1 and second rotary kiln 4, can open the parcel of molybdenum oxide granule, refines the particle diameter, is favorable to the degree of depth oxidation of second rotary kiln 4 to molybdenum oxide.
In some embodiments, the molybdenum oxide calcination system further comprises a cooler 13, the cooler 13 is disposed right below the second discharge port 404, and the cooler 13 cools the molybdenum oxide generated in the second rotary kiln 4.
As shown in fig. 1, the cooler 13 has a first cooling inlet 131 and a first cooling outlet 132, and the first cooling inlet 131 is connected to the second discharge port 404. Specifically, the cooler 13 is a water-cooled screw cooler 13. It is to be understood that the cooler 13 in the embodiment of the present invention is not shown here.
In some embodiments, the molybdenum oxide roasting system further comprises a packaging subsystem, the packaging subsystem is connected to the second discharge port 404, the packaging subsystem comprises a conveyor 14, an elevator 15, a bin 16 and a packaging machine 17, the conveyor 14 is arranged right below the first cooling outlet 132 and used for conveying molybdenum oxide discharged from the second rotary kiln 4, the elevator 15 is used for lifting molybdenum oxide discharged from the conveyor 14, an inlet of the bin 16 is connected to a discharge port of the elevator 15, the bin 16 is used for storing molybdenum oxide, the packaging machine 17 is arranged right below the bin 16, and the packaging machine 17 is used for packaging molybdenum oxide.
It should be noted that the conveyor 14 may be connected to multiple sets of roasting systems, so as to implement parallel production of multiple sets of roasting systems, and improve the production efficiency of molybdenum oxide.
The utility model discloses molybdenum oxide baking system through establishing at the packing subsystem, can carry out automatic transport, storage and packing with the molybdenum oxide that baking system produced, improves the degree of automation of molybdenum oxide production.
The operation of the molybdenum oxide calcination system of an embodiment of the present invention is described below with reference to fig. 1.
The molybdenum concentrate continuously enters a drying bed 6, hot air generated by the second heat exchanger 5 enters the drying bed 6 to continuously dry the molybdenum concentrate, the hot air carrying the molybdenum concentrate enters a first dust collector 7, and dried tail gas is directly discharged out of the first dust collector 7 to be discharged.
It is noted that the range of the molybdenum concentrate is 38% -60% of the taste of the molybdenum-containing product, and the water content is less than 15%. The device for continuously feeding the molybdenum concentrate to the drying bed 6 may be a screw feeder or a rigid impeller. The moisture content of the molybdenum concentrate dried by the drying bed 6 is less than 6 percent.
The air volume and the temperature of the hot air generated by the second heat exchanger 5 and used for the drying bed 6 can be adjusted according to the water content and the feeding amount of the molybdenum concentrate, and specifically, the temperature of the hot drying air is 200-350 ℃.
The molybdenum concentrate in the first dust collector 7 quantitatively enters the first rotary kiln 1 through the first feeder 18, the molybdenum concentrate is subjected to oxidation reaction in the first rotary kiln 1 to produce industrial molybdenum oxide, and the proportion of MoO3 in the industrial molybdenum oxide in the first rotary kiln 1 is 60-70%.
Industrial molybdenum oxide in the first rotary kiln 1 enters the high-temperature crusher 12 to be crushed, the crushed industrial molybdenum oxide enters the second rotary kiln 4 to be deeply oxidized, is discharged into the cooler 13 through the second discharge port 404, and is discharged into the packaging subsystem to be stored and packaged after passing through the cold zone of the cooler 13. The solubility of the industrial molybdenum oxide discharged from the second discharge port 404 is more than 90%, that is, the proportion of MoO3 in the industrial molybdenum oxide is more than 90%.
The first fan 9 blows cold air into the first heat exchanger 2, heat generated by the first rotary kiln 1 is converted into high-temperature hot air after heat exchange, the high-temperature hot air is divided into two paths through the hot air distributor 3, one path of the high-temperature hot air enters the first rotary kiln 1 again after being distributed by the hot air distributor 3 and drives sulfur-containing flue gas to enter the second heat exchanger 5, the hot air generated after heat exchange of the sulfur-containing flue gas is discharged to the drying bed 6 by the second heat exchanger 5 and used for drying molybdenum concentrate, and the other path of the high-temperature hot air enters the second rotary kiln 4 after being distributed by the hot air distributor 3 and is used for deep oxidation of the second rotary kiln 4 and heat balance in the second rotary kiln 4.
Sulfur-containing flue gas generated in the first rotary kiln 1 is discharged into the second heat exchanger 5 through the first flue gas outlet 102, hot air generated after heat exchange of the sulfur-containing flue gas is used for drying molybdenum concentrate by the second heat exchanger 5 through the drying bed 6, the cooled sulfur-containing flue gas enters the second dust collector 8 for dust collection, smoke and dust collected in the second dust collector 8 are discharged into the first dust collector 7 again, and flue gas in the second dust collector 8 enters the acid making subsystem 11 for making acid or preparing sodium sulfite.
It should be noted that the sulfur content in the sulfur-containing flue gas generated by the first rotary kiln 1 is 2% -4.5%.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A molybdenum oxide calcination system, comprising:
the first rotary kiln is provided with a first feeding hole, a first flue gas outlet, a first hot air inlet, a first flue gas inlet and a first discharging hole;
the first heat exchanger is arranged on the first rotary kiln and is provided with a first heat exchange air inlet and a first heat exchange hot air outlet;
the hot air distributor is provided with a hot air distribution air inlet, a first hot air distribution outlet and a second hot air distribution outlet, the hot air distribution air inlet is connected with the first heat exchange hot air outlet, and the first hot air distribution outlet is connected with the first hot air inlet;
the second rotary kiln is provided with a second feeding hole, a second flue gas outlet, a second hot air inlet and a second discharge hole, the second feeding hole is connected with the first discharge hole, the second flue gas outlet is connected with the first flue gas inlet, and the second hot air inlet is connected with the second hot air distribution outlet;
the second heat exchanger is provided with a second heat exchange smoke inlet, a second heat exchange smoke outlet, a second heat exchange air inlet and a second heat exchange air outlet, and the second heat exchange smoke inlet is connected with the first smoke outlet;
and the drying bed is provided with a drying feed inlet, a drying hot air inlet and a drying discharge port, the drying hot air inlet is connected with the second heat exchange air outlet, and the drying discharge port is connected with the first feed inlet.
2. The molybdenum oxide roasting system of claim 1, further comprising a first dust collector, wherein the first dust collector is provided with a first dust collecting inlet, a dry tail gas outlet and a first dust collecting outlet, the first dust collecting inlet is connected with the dry discharge port, and the first dust collecting outlet is connected with the first feed port.
3. The molybdenum oxide roasting system of claim 2, further comprising a second dust collector having a second dust collection inlet, a third flue gas outlet, and a second dust collection outlet, wherein the second dust collection inlet is connected to the second heat exchange flue gas outlet, and the second dust collection outlet is connected to the first dust collection inlet.
4. The molybdenum oxide roasting system of claim 3, wherein the first dust collector and the second dust collector are both bag collectors.
5. The molybdenum oxide roasting system of claim 1, wherein the first feed port and the first flue gas outlet are adjacent a first end of the rotary kiln, and the first discharge port, the first hot air inlet, and the first flue gas inlet are adjacent a second end of the rotary kiln.
6. The molybdenum oxide roasting system of claim 5, wherein the second feed inlet, the second flue gas outlet are adjacent a first end of the second rotary kiln, and the second hot air inlet and the second discharge outlet are adjacent a second end of the second rotary kiln.
7. The molybdenum oxide roasting system of claim 1, wherein the first heat exchanger comprises a plurality of heat exchange tubes, and the heat exchange tubes are attached to the outer wall of the first rotary kiln along the circumferential direction of the first rotary kiln and are positioned in the middle of the first rotary kiln along the axial direction of the first rotary kiln.
8. The molybdenum oxide roasting system of claim 1, further comprising a first fan and a second fan, wherein an air outlet of the first fan is connected to the first heat exchange air inlet, and an air outlet of the second fan is connected to the second heat exchange air inlet.
9. The molybdenum oxide roasting system of claim 3, further comprising an acid making subsystem, wherein the acid making subsystem is connected to the third flue gas outlet.
10. The molybdenum oxide roasting system of any one of claims 1-9, wherein the second discharge outlet discharges a molybdenum oxide solubles greater than 90%.
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| CN202120368504.4U CN214620594U (en) | 2021-02-07 | 2021-02-07 | Molybdenum oxide roasting system |
| PCT/CN2022/075191 WO2022166925A1 (en) | 2021-02-07 | 2022-01-30 | Molybdenum oxide roasting system |
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| CN202120368504.4U CN214620594U (en) | 2021-02-07 | 2021-02-07 | Molybdenum oxide roasting system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112902657A (en) * | 2021-02-07 | 2021-06-04 | 中国恩菲工程技术有限公司 | Molybdenum oxide roasting system |
| WO2022166925A1 (en) * | 2021-02-07 | 2022-08-11 | 中国恩菲工程技术有限公司 | Molybdenum oxide roasting system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112902657A (en) * | 2021-02-07 | 2021-06-04 | 中国恩菲工程技术有限公司 | Molybdenum oxide roasting system |
| WO2022166925A1 (en) * | 2021-02-07 | 2022-08-11 | 中国恩菲工程技术有限公司 | Molybdenum oxide roasting system |
| CN112902657B (en) * | 2021-02-07 | 2023-02-28 | 中国恩菲工程技术有限公司 | Molybdenum oxide roasting system |
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