Molybdenum ore pyrometallurgy device

Abstract

The invention relates to the field of molybdenum and rhenium extraction metallurgy and molybdenum and rhenium chemical preparation, in particular to a molybdenum ore pyrometallurgy device. The molybdenum ore pyrometallurgy device comprises a drying furnace, a preheating furnace, a roasting furnace and a trolley system. Wherein the drying furnace, the preheating furnace and the roasting furnace are connected in series to form a roasting system. According to the invention, a furnace and cover split-assembly design mode is adopted, a multi-stage material storage treatment system is adopted, and efficient butt joint of a multi-stage starting furnace is adopted, so that efficient treatment of product collection, segregation and purification is realized. The device can isolate the influence of external gas, impurities and other adverse factors, is suitable for drying, deoiling, impurity removal and high-temperature roasting of various molybdenum ores such as molybdenum sulfide ores, molybdenum oxide ores / molybdenum calcine and the like in various atmospheres, and solves the problems of equipment corrosion, steam leakage, product pollution, continuous production, product collection, tail gas treatment and the like.

Description

Technical Field

[0001] The present invention relates to the fields of molybdenum and rhenium extraction metallurgy and molybdenum and rhenium chemical product preparation, and in particular to a molybdenum ore pyrometallurgical device. Background Art

[0002] Existing processes such as oxidation roasting-ammonia leaching, calcification roasting-ammonia leaching, oxidation roasting-sublimation and flash roasting-sublimation have problems such as complex procedures, low efficiency, high cost and high equipment requirements. Patents CN201710203567.2 and CN201910490887.X disclose a new short-process method for processing (rhenium-containing) molybdenum concentrate, which reduces the number of steps and significantly improves efficiency and recovery rate. If the existing chain grate machine, rotary hearth furnace, roller hearth furnace and other equipment are used to implement the method, there are problems such as equipment corrosion, poor sealing and product contamination. At the same time, patent CN202011369638.4 specifically discloses a corresponding equipment device, which has advantages such as corrosion resistance and pure products, but is complex to operate, has high consumables costs, and does not solve problems such as continuous production, molybdenum-rhenium product collection and tail gas treatment. Therefore, it is urgent to develop a device that can continuously produce molybdenum-rhenium products suitable for molybdenum ore production to further promote the industrial application of this technology. Summary of the Invention

[0003] In view of this, the object of the present invention is to provide a molybdenum ore pyrometallurgical device so as to efficiently and reliably complete the tasks of molybdenum ore pellet drying, deoiling, high-temperature roasting, molybdenum (rhenium) volatilization, molybdenum (rhenium) vapor purification, and product collection, while solving the problems of equipment corrosion, steam leakage, product contamination, complex equipment operation, high consumables cost, continuous production, molybdenum-rhenium product collection, and tail gas treatment.

[0004] The present invention solves the above problems through the following technical means:

[0005] The present invention provides a molybdenum ore pyrometallurgical device, comprising a drying furnace 20, a preheating furnace 22, a roasting furnace 24, and a trolley system;

[0006] A drying furnace 20, a preheating furnace 22, and a roasting furnace 24 are connected in series to form a roasting system. Each of the drying furnace 20, the preheating furnace 22, and the roasting furnace 24 comprises a furnace frame 1, a heating furnace body 2, an inner furnace cover 3, and a heating element 4. The heating furnace body 2 is located on the furnace frame 1, which has an opening in contact with the outer wall of the inner furnace cover 3. The inner furnace cover 3 and the heating element 4 are located within the heating furnace body 2. The top of the inner furnace cover 3 has an opening that leads out as an exhaust port 5.

[0007] Any trolley in the trolley system includes a steel structure base 6, a lifting mechanism 7, a load-bearing base 8, and a material carrying container 11; the lifting mechanism 7 is located on the steel structure base 6, the load-bearing base 8 is arranged on the lifting mechanism 7, and the material carrying container 11 is arranged on the top of the load-bearing base 8; a gas channel 9 that can be connected to the outside world is provided in the load-bearing base 8; the input gas enters the bottom of the material carrying container 11 along the gas channel 9.

[0008] The exhaust interface 5 of the roasting furnace 24 is connected to the air inlet end of the filter 12, and the discharge end of the filter 12 is connected to the feed pipe of the No. 1 open furnace 12 through a pipeline. The outlet of the discharge pipe of the No. 1 open furnace 12 is communicated with the lower part of the No. 1 storage tank 14, and the upper part of the No. 1 storage tank 14 is connected to the feed pipe of the No. 2 open furnace 16 through a conduit 15 made of ceramic or quartz material. The discharge pipe of the No. 2 open furnace 16 is connected to the lower part of the No. 2 storage tank 17, and the upper part of the No. 2 storage tank 17 is connected to the lower part of the No. 3 discharge tank 18 through a pipeline. The upper part of the No. 3 discharge tank 18 is connected to the tail gas treatment device 19 through a pipeline. The reason why the present invention adopts such a connection relationship for the output of the roasting furnace is that the volatile vapor can be prevented from contacting the outside world, and continuous production enrichment is achieved, thereby ensuring the purity and production efficiency of subsequent products. With the above design, not only can the separation and purification of the volatile vapors of multiple products be achieved, but also multi-stage purification of products can be achieved, and products of different purity levels can be obtained in stages.

[0009] When the trolley loaded with materials is passively sent to the bottom of any one of the drying furnace 20, preheating furnace 22, and roasting furnace 24, the lifting mechanism 7 starts the ascending function, and raises the material carrying container 11 to the outer edge of the load-bearing base 8 to contact the inner furnace cover 3, and then the corresponding furnace starts to work. When the corresponding work is completed, the lifting mechanism 7 starts the descending function, descending to the outer edge of the load-bearing base 8 to break away from the inner furnace cover 3, and the material carrying container 11 can be smoothly detached from the corresponding furnace and sent to the designated position by the trolley.

[0010] The inner furnace cover used in the present invention is preferably a high temperature resistant and corrosion resistant inner furnace cover.

[0011] The furnace chamber can be sealed after the furnace cover and the load-bearing base are connected.

[0012] In the present invention, the distances from the horizontal plane of the No. 1 storage tank 14, the No. 2 storage tank 17, and the No. 3 discharge tank 17 are successively increased. The advantage of this design is that the volatile vapor rises to the next storage tank under sufficient pressure, increasing the residence time of the vapor in the tank, allowing the vapor to fully condense and ensure the purity of the next product.

[0013] In the present invention, the furnace, the storage tank and the tail gas treatment device are used in combination to realize the functions of steam collection, condensation and purification.

[0014] The present invention provides a molybdenum ore pyrometallurgical device, wherein a drying furnace 20 is used to dry raw materials; a preheating furnace 22 is used to preheat and remove oil from the dried raw materials; an exhaust port 5 of the preheating furnace 22 is connected to an exhaust gas treatment system, and the exhaust gas is discharged into the atmosphere after waste heat recovery and purification;

[0015] The calcining furnace 24 performs high-temperature calcination.

[0016] The present invention discloses a molybdenum ore pyrometallurgical device. Projected parallel to a horizontal plane, the upper end of a load-bearing base 8 is V-shaped or an isosceles trapezoid, with the upper base facing upward and the lower base facing downward, and the lower base being shorter than the upper base. A material carrying container 11 is mounted on the upper end of the load-bearing base 8. Ventilation holes, preferably in the form of racks, are provided at the bottom of the container. This design prevents material accumulation and blockage of the air port, ensuring that the incoming air reacts fully and evenly with the material.

[0017] The present invention provides a molybdenum ore pyrometallurgical device, wherein the load-bearing base 8 is in the shape of "┴", wherein the horizontally arranged part is the bottom of the load-bearing base 8, and when the lifting mechanism 7 rises to the designated working position, the outer edge of the upper end of the bottom of the load-bearing base 8 contacts the bottom of the inner furnace cover 3.

[0018] In industrial applications, the outer edge of the upper end of the bottom of the load-bearing base 8 is designed with a groove so that it can better contact with the inner furnace cover 3.

[0019] In industrial applications, a layer of heat-insulating material is provided on the inner side of the bottom section of the inner furnace cover 3. The present invention provides a molybdenum ore pyrometallurgical device, wherein the load-bearing base 8 is filled with heat-insulating material and a base heating element 10.

[0020] The present invention provides a molybdenum ore pyrometallurgical device, wherein the passages of the drying furnace 20 and the preheating furnace 22 are sealed with high-temperature corrosion-resistant plates 21 , and a high-temperature and corrosion-resistant sealing gate 23 is provided between the preheating furnace 22 and the roasting furnace 24 .

[0021] In the present invention, the material carrying container 11 is a crucible or a quartz boat, or other material carrying containers suitable for ceramic materials.

[0022] The present invention provides a molybdenum ore pyrometallurgical device, wherein the roasting furnace adopts an electric heating method, and the inner furnace cover is made of a high-temperature corrosion-resistant material.

[0023] The invention discloses a molybdenum ore pyrometallurgy device. The open furnace consists of a furnace shell, a heating chamber, a heating element and a heat insulation layer.

[0024] The present invention provides a molybdenum ore pyrometallurgical device. The feed inlet pipe of the storage tank 14 is tilted downward by 30 to 45 degrees. The discharge port of the storage tank 14 is connected to the No. 2 open furnace 16 by an upwardly inclined pipe. The upwardly inclined pipe forms an angle of 30 to 45 degrees with the horizontal plane. This design can prevent material accumulation.

[0025] The trolley lifting mechanism of the present invention is controlled by a servo motor. The load-bearing base supports the crucible above and is connected to the air intake duct below. Tracks are laid on the bottom of the furnace frame to facilitate continuous operation. The present invention provides a molybdenum ore pyrometallurgical device, which also includes tracks for controlling the trajectory of the trolley. The tracks can be straight or circular, preferably circular.

[0026] Furthermore, the open furnace includes a heating furnace body and a heating chamber. The heating chamber and the furnace shell are provided with a thermal insulation layer made of thermal insulation materials such as alumina bricks and ceramic fiber wool masonry, and the heating elements are pre-buried in the inner lining of the furnace body.

[0027] Furthermore, the opening furnace is closely connected to the front end of the storage tank to control the inlet temperature of the storage tank.

[0028] Furthermore, the storage tank is connected to an alkaline water spray tower to treat SO2 tail gas to prepare sulfuric acid or to introduce lime for absorption to prepare gypsum.

[0029] Beneficial effects of the present invention:

[0030] The present invention discloses a molybdenum ore pyrometallurgical device that can produce high-purity products while ensuring continuous production. The flue gas treatment system of the present invention is composed of an open furnace, at least two levels of storage tanks at different heights, and an exhaust gas treatment device. This system not only achieves product collection, condensation, and purification, but also maximizes production and processing efficiency. The present invention also designs a multi-stage open furnace that not only provides and controls heat to the material in the pipeline, but also, in conjunction with the multi-stage storage tanks, achieves a graded increase in product purity.

[0031] The molybdenum ore pyrometallurgical device designed in the present invention can isolate the influence of adverse factors such as external gases and impurities. It is suitable for drying, deoiling, removing impurities and high-temperature roasting of various molybdenum ores such as sulfide molybdenum ore, oxide molybdenum ore / molybdenum roasted sand under various atmospheres, and solves problems such as equipment corrosion, steam leakage, product contamination, continuous production, product collection and tail gas treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below with reference to the accompanying drawings and examples.

[0033] Figure 1 Schematic diagram of the structure of the reactor of the present invention;

[0034] Figure 2 Schematic diagram of the collection system;

[0035] Figure 3 It is a top view schematic diagram of continuous production;

[0036] Figure 4 This is a schematic diagram of the main view of continuous production.

[0037] In the figure, 1 is the furnace frame, 2 is the heating furnace body, 3 is the inner furnace cover, 4 is the heating element, 5 is the exhaust interface, 6 is the steel structure base, 7 is the lifting mechanism, 8 is the load-bearing base, 9 is the gas channel, and 10 is the bearing base heating element; 11 is the material carrying container, 12 is the filter, 13 is the No. 1 open furnace, 14 is the No. 1 storage tank, 15 is the ceramic or quartz material conduit, 16 is the No. 2 open furnace, 17 is the No. 2 storage tank, 18 is the No. 3 storage tank, 19 is the exhaust gas treatment device, 20 is the drying furnace, 21 is the high temperature and corrosion resistant plate, 21 is the preheating furnace, 23 is the high temperature and corrosion resistant sealing gate, 24 is the roasting furnace, and 25 is the track laid at the bottom of the furnace frame. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below through the examples. Through these descriptions, the characteristics and advantages of the present invention will become more clear and distinct. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments.

[0039] The molybdenum ore pyrometallurgical device used in the embodiment of the present invention includes a drying furnace 20, a preheating furnace 22, a roasting furnace 24, and a trolley system;

[0040] The roasting system is composed of a drying furnace 20, a preheating furnace 22, and a roasting furnace 24 connected in series. The drying furnace 20, the preheating furnace 22, and the roasting furnace 24 each include a furnace frame 1, a heating furnace body 2, an inner furnace cover 3, and a heating element 4. The heating furnace body 2 is located on the furnace frame 1, and an opening is provided on the furnace frame 1. The opening contacts the outer wall of the inner furnace cover 3. The inner furnace cover 3 and the heating element 4 are arranged in the heating furnace body 2.

[0041] The top of the inner furnace cover 3 is opened to serve as an exhaust port 5;

[0042] Each trolley in the trolley system consists of a steel base 6, a lifting mechanism 7, a load-bearing base 8, and a material container 11. The lifting mechanism 7 is located on the steel base 6, the load-bearing base 8 is placed on the lifting mechanism 7, and the material container 11 is placed on top of the load-bearing base 8. A gas channel 9 is provided within the load-bearing base 8, which is connected to the outside world. The input gas enters the bottom of the material container 11 along the gas channel 9. The material container is a quartz boat. The material of the load-bearing base 8 is also quartz.

[0043] The exhaust interface 5 of the roasting furnace 24 is connected to the air inlet end of the filter 12, and the discharge end of the filter 12 is connected to the feed pipe of the No. 1 start furnace 12 through a pipe. The outlet of the discharge pipe of the No. 1 start furnace 12 is connected to the lower part of the No. 1 storage tank 14. The upper part of the No. 1 storage tank 14 is connected to the feed pipe of the No. 2 start furnace 16 through a ceramic or quartz material conduit 15. The discharge pipe of the No. 2 start furnace 16 is connected to the lower part of the No. 2 storage tank 17. The upper part of the No. 2 storage tank 17 is connected to the lower part of the No. 3 discharge tank 18 through a pipe, and the upper part of the No. 3 discharge tank 18 is connected to the exhaust gas treatment device 19 through a pipe.

[0044] When the trolley loaded with materials is passively sent to the bottom of any one of the drying furnace 20, preheating furnace 22, and roasting furnace 24, the lifting mechanism 7 starts the ascending function, and raises the material carrying container 11 to the outer edge of the load-bearing base 8 to contact the inner furnace cover 3, and then the corresponding furnace starts to work. When the corresponding work is completed, the lifting mechanism 7 starts the descending function, descending to the outer edge of the load-bearing base 8 to break away from the inner furnace cover 3, and the material carrying container 11 can be smoothly detached from the corresponding furnace and sent to the designated position by the trolley.

[0045] The inner furnace cover used in the present invention is preferably a high temperature resistant and corrosion resistant inner furnace cover.

[0046] The furnace chamber can be sealed after the furnace cover and the load-bearing base are connected.

[0047] In the present invention, the distances between the No. 1 storage tank 13, the No. 2 storage tank 17, and the No. 3 discharge tank 17 and the horizontal plane increase sequentially.

[0048] In the present invention, the furnace, the storage tank and the tail gas treatment device are used in combination to realize the functions of steam collection, condensation and purification.

[0049] The present invention provides a molybdenum ore pyrometallurgical device, wherein a drying furnace 20 is used to dry raw materials; a preheating furnace 22 is used to preheat and remove oil from the dried raw materials; an exhaust port 5 of the preheating furnace 22 is connected to an exhaust gas treatment system, and the exhaust gas is discharged into the atmosphere after waste heat recovery and purification;

[0050] The calcining furnace 24 performs high-temperature calcination.

[0051] The present invention provides a molybdenum ore pyrometallurgical device, which is projected parallel to the horizontal plane, and the upper end of the load-bearing base 8 is in the shape of a "V" or an isosceles trapezoid, with the upper base of the trapezoid facing upward and the lower base facing downward, and the length of the lower base is smaller than the length of the upper base; the material carrying container 11 is mounted on the upper end of the load-bearing base 8; the bottom of the material carrying container 11 is provided with air vents, and the air vents are preferably rack-shaped air vents. This design can prevent material accumulation and blockage of the air port, allowing the intake air to react fully and evenly with the material. The present invention provides a molybdenum ore pyrometallurgical device, and the load-bearing base 8 is in the shape of a "┴", wherein the horizontally arranged portion is the bottom of the load-bearing base 8. When the lifting mechanism 7 rises to the designated workstation, the outer edge of the bottom upper end of the load-bearing base 8 contacts the bottom of the inner furnace cover 3.

[0052] The outer edge of the upper end of the bottom of the load-bearing base 8 is designed with a groove so that it can better contact with the inner furnace cover 3.

[0053] In industrial applications, a layer of heat-insulating material is provided on the inner side of the bottom section of the inner furnace cover 3. The present invention provides a molybdenum ore pyrometallurgical device, wherein the load-bearing base 8 is filled with heat-insulating material and a heating element 10.

[0054] The passages of the drying furnace 20 and the preheating furnace 22 are sealed with high-temperature corrosion-resistant plates 21 . A high-temperature and corrosion-resistant sealing gate 23 is provided between the preheating furnace 22 and the roasting furnace 24 .

[0055] The feed port pipe of the storage tank 13 is tilted downward at 45°, and the discharge port of the storage tank 13 is connected to the No. 2 open furnace 16 through an upward oblique pipe, which forms an angle of 45° with the horizontal plane.

[0056] A track 25 is laid on the bottom of the furnace frame for continuous operation.

[0057] Example 1

[0058] A molybdenum ore pyrometallurgical apparatus comprises a drying furnace 20, a preheating furnace 22, a roasting furnace 24, and an atmosphere collection system. The drying, preheating, and roasting furnaces consist of a grate 1, a heating furnace body 2, an inner furnace cover 3, heating elements 4, and a lifting trolley system. Tracks 25 are laid at the bottom of the grate to facilitate continuous operation. The inner furnace cover 3 is connected to a quartz base 8. The inner furnace covers of the drying and preheating furnaces are made of high-temperature, corrosion-resistant stainless steel, while the inner furnace cover of the roasting furnace is made of a silicon-based material such as quartz. The exhaust duct 5, formed by an opening at the top of the inner furnace cover, is connected to a ceramic filter to filter dust and impurities and then to a smoke treatment system. The trolley system consists of a steel base 6, a lifting mechanism 7, a quartz base 8, an air inlet duct 9, and a quartz boat 11. The trolley lifting mechanism is controlled by a servo motor. The quartz boat is supported on a quartz load-bearing base, and the air inlet duct is connected below. The quartz base is inverted on the trolley's steel platform and filled with insulation material. The roasting furnace is connected to the collection system via a quartz pipe. The collection system comprises a No. 1 starter furnace 13, a No. 2 starter furnace 16, a quartz pipe 15, a No. 1 storage tank 14, a No. 2 storage tank 17, a No. 3 storage tank 18, and an exhaust gas treatment device 19. The starter furnace consists of a furnace shell, a heating chamber, heating elements, and an insulation layer. The storage tank is connected to the starter furnace via a quartz pipe. Molybdenum concentrate pellets are placed in a quartz boat and transported by a trolley to a drying furnace under nitrogen protection at 200°C for drying. After drying, the trolley transports the molybdenum concentrate to a preheating furnace under nitrogen protection at 600°C for deoiling. The molybdenum concentrate is then transported to the roasting furnace under an oxygen atmosphere at a controlled temperature of 1050-1150°C for oxidative roasting. The roasting generates molybdenum-rhenium vapor, which enters the collection system from the roasting furnace to collect MoO3 and rhenium oxide products. The front end of the storage tank is tightly connected to the starter furnace to ensure that the temperature of the gas entering the storage tank is above 800°C. The steam temperature of the No. 1 start-up furnace is controlled at 800°C and then enters the No. 1 storage tank to collect MoO3. The uncondensed molybdenum-rhenium vapor enters the No. 2 start-up furnace, where the steam temperature is controlled at 800°C, and then enters the No. 2 storage tank to further collect MoO3. The uncondensed rhenium-rich vapor enters the No. 3 storage tank to collect rhenium oxide. The SO2 exhaust gas enters the exhaust gas treatment device for treatment in an alkaline water spray tower connected to produce sulfate or absorbed by lime to produce gypsum.

[0059] like Figure 3 As shown, the specific continuous production process is as follows: the first charge, a quartz boat filled with molybdenum concentrate pellets, first enters the drying furnace 20 for pellet drying. After drying, it is transported by a trolley to the preheating furnace 22 for deoiling. After this, it is transported by a trolley to the roasting furnace 24 for oxidative roasting. While the first charge is being deoiled, the second charge can be loaded into the drying furnace and then into the preheating furnace. At this point, the first charge is roasted and removed for reloading. Simultaneously, the second charge enters the roasting furnace for roasting, completing a single cycle that repeats itself to achieve continuous production.

[0060] As shown in Figure 2, the specific purification steps are as follows: the molybdenum-rhenium vapor flowing out of the roasting furnace passes through a filter to filter out dust and impurities, then enters the No. 1 open furnace. The vapor is maintained at a temperature above 800°C and enters the No. 1 storage tank. The temperature of the No. 1 storage tank is controlled at approximately 500°C to collect the main MoO3 product. The uncondensed molybdenum-rhenium vapor enters the No. 2 open furnace and controls the vapor temperature to 800°C before entering the No. 2 storage tank. The No. 2 storage tank is controlled at 500°C. The remaining small amount of MoO3 product is condensed and enriched at this stage. The rhenium-rich vapor that flows out then enters the No. 3 storage tank to collect the rhenium product. After the above treatment, the molybdenum recovery rate is as high as 96.44%, and the rhenium recovery rate is 99.9%. The purity of the MoO3 product reaches 99.95% or above, meeting the requirements of industrial-grade molybdenum trioxide.

[0061] In summary, the molybdenum concentrate pyrometallurgical smelting device of this embodiment can efficiently and reliably complete the tasks of molybdenum concentrate pellet drying, molybdenum concentrate pellet deoiling, molybdenum concentrate pellet oxidative roasting, molybdenum-rhenium volatilization, molybdenum-rhenium vapor purification, and molybdenum-rhenium oxide product collection. At the same time, it solves the problems of equipment corrosion, steam leakage, product contamination, complex equipment operation, high consumables cost, continuous production and molybdenum-rhenium product collection.

[0062] Example 2

[0063] Compared with the above embodiment, this embodiment differs in that the raw material is changed to molybdenum roasted sand pellets. No oxygen is required in the roasting furnace, and the molybdenum roasted sand directly sublimates to generate MoO3 vapor, which enters the collection system for product collection. The molybdenum recovery rate is greater than or equal to 96%, and the MoO3 product purity reaches 99.95% or higher.

[0064] Comparative Example 1

[0065] Compared with Example 1, the difference is that: the drying furnace 20 and the preheating furnace 22 are not used, and only the roasting furnace 24 is used; the experiment found that: a single furnace cannot achieve continuous production, and the temperature needs to be continuously raised and lowered, which consumes time and is inefficient; and the gas atmosphere needs to be continuously changed, resulting in low efficiency.

[0066] Comparative Example 2

[0067] For the device of the present invention, if the furnace is not designed to be opened for heating and heat preservation (>800°C), MoO3 will condense in the pipeline, resulting in pipeline blockage and the purity of the product cannot reach 99.9%.

[0068] Comparative Example 3

[0069] Other conditions are consistent with Example 1, except that: the feed port pipe of the storage tank 14 is horizontal, and the discharge port of the storage tank 14 is connected to the No. 2 start-up furnace 16 through a horizontal pipe, which causes the feed port of the storage tank 14 to be easily blocked after a period of use.

[0070] Comparative Example 4

[0071] Other conditions were the same as those in Example 1, except that the No. 1, No. 2, and No. 3 storage tanks were located at the same level. This caused the vapor to flow into the next storage tank along with the airflow, resulting in insufficient condensation time, resulting in product loss, low recovery rate, and decreased product purity. Specifically, the purity of the materials in No. 1, No. 2, and No. 3 storage tanks was less than 98%.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A molybdenum ore pyrometallurgical device, characterized in that: It includes a drying furnace (20), a preheating furnace (22), a roasting furnace (24), and a trolley system; A drying furnace (20), a preheating furnace (22), and a roasting furnace (24) are connected in series to form a roasting system, wherein the drying furnace (20), the preheating furnace (22), and the roasting furnace (24) each comprise a furnace frame (1), a heating furnace body (2), an inner furnace cover (3), and a heating element (4); wherein the heating furnace body (2) is located on the furnace frame (1), an opening is provided on the furnace frame (1), and the opening contacts the outer wall of the inner furnace cover (3); and the inner furnace cover (3) and the heating element (4) are arranged in the heating furnace body (2); The top of the inner furnace cover (3) is opened to serve as an exhaust port (5); Any trolley in the trolley system comprises a steel structure base (6), a lifting mechanism (7), a load-bearing base (8), and a material carrying container (11); wherein the lifting mechanism (7) is located on the steel structure base (6), the load-bearing base (8) is arranged on the lifting mechanism (7), and the material carrying container (11) is arranged on the top of the load-bearing base (8); a gas channel (9) that can be connected to the outside is provided in the load-bearing base (8); the input gas enters the bottom of the material carrying container (11) along the gas channel (9); The exhaust interface (5) of the roasting furnace (24) is connected to the air inlet end of the filter (12), the discharge end of the filter (12) is connected to the feed pipe of the No. 1 start furnace (13) through a pipeline, the outlet of the discharge pipe of the No. 1 start furnace (13) is connected to the lower part of the No. 1 storage tank (14), the upper part of the No. 1 storage tank (14) is connected to the feed pipe of the No. 2 start furnace (16) through a ceramic or quartz material conduit (15), the air outlet pipe of the No. 2 start furnace (16) is connected to the lower part of the No. 2 storage tank (17), the upper part of the No. 2 storage tank (17) is connected to the lower part of the No. 3 discharge tank (18) through a pipeline, and the upper part of the No. 3 discharge tank (18) is connected to the tail gas treatment device (19) through a pipeline; When the trolley loaded with materials is transported to the position directly below any one of the drying furnace (20), preheating furnace (22), and roasting furnace (24), the lifting mechanism (7) starts the lifting function, and lifts the material carrying container (11) to the outer edge of the load-bearing base (8) and contacts the inner furnace cover (3), and then the corresponding furnace starts to work. When the corresponding work is completed, the lifting mechanism (7) starts the descending function, and descends to the outer edge of the load-bearing base (8) and breaks away from the inner furnace cover (3), and the material carrying container (11) can be smoothly detached from the corresponding furnace and sent to the designated position by the trolley.

2. The molybdenum ore pyrometallurgical device according to claim 1, characterized in that: The drying furnace (20) is used to dry the raw materials; the preheating furnace (22) is used to preheat and remove oil from the dried raw materials; the exhaust interfaces (5) of the drying furnace (20) and the preheating furnace (22) are connected to the tail gas treatment system, and the exhaust gas is discharged into the atmosphere after waste heat recovery and purification; the roasting furnace (24) performs high-temperature roasting.

3. The molybdenum ore pyrometallurgical device according to claim 1, characterized in that: When projected parallel to the horizontal plane, the upper end of the load-bearing base (8) is in a "V" shape or an isosceles trapezoid, with the upper base of the trapezoid facing upward and the lower base facing downward, and the length of the lower base being smaller than the length of the upper base; the material carrying container (11) is mounted on the upper end of the load-bearing base (8); and a vent hole is provided at the bottom of the material carrying container (11).

4. The molybdenum ore pyrometallurgical device according to claim 1, characterized in that: The load-bearing base (8) is in the shape of a "┴", wherein the horizontally arranged portion is the bottom of the load-bearing base (8). When the lifting mechanism (7) rises to the designated position, the outer edge of the bottom upper end of the load-bearing base (8) contacts the bottom of the inner furnace cover (3).

5. The molybdenum ore pyrometallurgical device according to claim 4, characterized in that: The load-bearing base (8) is filled with heat-insulating material and a base heating element (10).

6. The molybdenum ore pyrometallurgical device according to claim 1, characterized in that: The molybdenum ore pyrometallurgical device also includes a track, which is used to regulate the running track of the trolley; the track is a straight track or a circular track; preferably, it is a circular track.

7. The molybdenum ore pyrometallurgical device according to claim 1, characterized in that: The passages of the drying furnace (20) and the preheating furnace (22) are sealed with high-temperature corrosion-resistant plates (21) on all sides, and a high-temperature corrosion-resistant sealing gate (23) is provided between the preheating furnace (22) and the roasting furnace (24).

8. The molybdenum ore pyrometallurgical device according to claim 1, characterized in that: The roasting furnace adopts electric heating, and the inner furnace cover is made of high-temperature corrosion-resistant material.

9. The molybdenum ore pyrometallurgical device according to claim 1, characterized in that: The open furnace consists of a furnace shell, a heating chamber, heating elements and an insulation layer.

10. The molybdenum ore pyrometallurgical device according to claim 1, characterized in that: The feed port pipe of the storage tank (14) is tilted downward by 30 to 45 degrees, and the discharge port of the storage tank (14) is connected to the No. 2 start furnace (16) through an upwardly inclined pipe, and the upwardly inclined pipe forms an angle of 30 to 45 degrees with the horizontal plane; The front and rear ends use pipes with an inclination of 30 to 45 degrees to prevent material accumulation.

Images