Preparation device of high-purity manganese carbonate

Abstract

The application discloses a kind of preparation devices of high-purity manganese carbonate, including the combustion device, calcining device and heat exchange device of matched combination.In the combustion device, the gas distribution pipe arranged in combustion furnace is connected with gas supply assembly, and the first waste gas collection assembly collects high-temperature waste gas generated by combustion;In the calcining device, the calcining furnace arranged above the combustion furnace is installed in the feeding mechanism of calcining furnace and transported in the calcining furnace, and the second waste gas collection assembly collects high-temperature waste gas generated by calcination;The heat exchange device includes opposite transmission mechanism and concentric combination outer sleeve, inner sleeve, and the inner sleeve is connected with the downstream end of combustion furnace and receives the material after calcination, and the outer sleeve transmits the material required for calcination, and the opposite transmission mechanism is installed in the outer sleeve and the inner sleeve.The waste heat and by-products can be efficiently utilized in each production link of high-purity manganese carbonate production, and the social demand for green and environmentally friendly production of high-purity manganese carbonate can be realized.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of industrial production of manganese carbonate, in particular to a preparation device for high-purity manganese carbonate. BACKGROUND

[0002] Manganese carbonate is an important industrial raw material, is an important raw material for synthesizing manganese dioxide and other manganese salts, and can be used as a catalyst, enamel, paint and the like. The production of high-purity manganese carbonate from pyrolusite is an important way of producing manganese carbonate.

[0003] In the industrial production of high-purity manganese carbonate, many key links such as roasting reduction and acid leaching are involved in the process. At present, in the production process, it is difficult to effectively reuse the heat source and intermediate conversion products. For example, in the roasting reduction process, the manganese monoxide produced is output and cooled to 70-90 DEG C by natural cooling, and then sulfuric acid solution is added for acid leaching treatment. In this process, since the temperature of the just output manganese monoxide product is about 280 DEG C, the heat of this part cannot be effectively utilized.

[0004] For another example, when ammonium carbonate salt is mixed with manganese sulfate solution, ammonia gas will overflow, which seriously affects the production environment. In the roasting process, the high-temperature carbon dioxide produced also has poor utilization effect, and is often directly discharged.

[0005] In summary, in the process of producing manganese carbonate from pyrolusite at present, there is a serious technical problem of resource waste, and it is difficult to meet the social demand for green and environmentally friendly production. SUMMARY

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present application is to provide a preparation device for high-purity manganese carbonate, which can effectively utilize waste heat and by-products in each production link, and can meet the social demand for green and environmentally friendly production of high-purity manganese carbonate.

[0007] The technical scheme adopted by the present application to achieve the above-mentioned purpose is as follows: a preparation method for high-purity manganese carbonate, comprising the following steps:

[0008] S1, selecting pyrolusite after crushing treatment, removing calcium, magnesium, iron and aluminum impurities in the pyrolusite after sulfuric acid pretreatment and ore washing treatment;

[0009] S2, mixing the product obtained in step S1 with coal powder and preheating, and then roasting, using methane as raw material, controlling the roasting temperature to be 300 DEG C, generating high-temperature manganese monoxide product, and preheating the product obtained in step S1 by heat exchange with the high-temperature manganese monoxide product;

[0010] S3, the product obtained in step S2 is immersed in a sulfuric acid solution, the high-temperature waste gas generated by the combustion and calcination treatment of methane is collected and heat-exchanged with the sulfuric acid solution to maintain the temperature of the sulfuric acid solution at 80°C, and a manganese sulfate solution is generated;

[0011] S4, the product obtained in step S3 is subjected to solid-liquid separation to remove the solid impurities therein;

[0012] S5, the waste gas after heat exchange in step S3 is collected, and an ammonium carbonate salt solution is generated after reaction with ammonia water;

[0013] S6, after the ammonium carbonate salt solution and the solution obtained in step S4 are fully mixed and reacted, a manganese carbonate precipitate and an ammonium sulfate salt solution are generated, the ammonium sulfate salt solution is heated to evaporate ammonia gas and generate a sulfuric acid solution, the ammonia gas is supplemented to the ammonia water required in step S5, and the sulfuric acid solution is supplemented to the sulfuric acid required in step S5;

[0014] S7, the manganese carbonate precipitate obtained in step S6 is subjected to washing and drying treatment to obtain a high-purity manganese carbonate precipitate.

[0015] A device for preparing high-purity manganese carbonate, comprising a combustion device, a calcination device, and a heat exchange device which are combined, the combustion device comprising a combustion furnace, a gas distribution pipe, and a first waste gas collection assembly, the gas distribution pipe being fixedly installed in the combustion furnace, a gas supply assembly being connected to the upstream end of the gas distribution pipe, and the first waste gas collection assembly being installed on the combustion furnace and collecting high-temperature waste gas generated by combustion.

[0016] The calcination device comprises a calcination furnace, a feeding mechanism, and a second waste gas collection assembly, the calcination furnace being arranged above the combustion furnace, the feeding mechanism being installed in the calcination furnace and being used to convey the calcined material from the upstream end to the downstream end of the calcination furnace, and the second waste gas collection assembly being installed on the top of the calcination furnace and collecting high-temperature waste gas generated by calcination.

[0017] The heat exchange device comprises a counter transmission mechanism and concentrically combined outer and inner sleeves, the inner sleeve being connected to the downstream end of the combustion furnace and receiving the material after calcination, the outer sleeve conveying the material required for calcination, and the counter transmission mechanism being installed in the outer and inner sleeves and conveying the corresponding material.

[0018] In some embodiments, to ensure that the gas supply assembly can stably supply gas to the combustion furnace for stable combustion of the combustion furnace, the following technical solutions about the gas supply assembly are provided.

[0019] The gas supply assembly comprises a gas pipe, an air pipe, and a first pressure pump, the upstream end of the gas distribution pipe is connected to the gas pipe, the air pipe is connected to the gas pipe, and the first pressure pump is installed on the air pipe; the gas distribution pipe is uniformly provided with vertically arranged gas injection ports.

[0020] In some implementations, to ensure that the first exhaust gas collection assembly effectively collects the high-temperature exhaust gas generated by the combustion of methane gas, the following technical solutions are provided for the first exhaust gas collection assembly.

[0021] The first exhaust gas collection assembly includes a first gas collection pipe, a first recovery pipe, and a second pressure pump. The first gas collection pipe includes multiple groups arranged side by side, and is connected to the top of the sidewall of the combustion furnace. Each first recovery pipe is connected to each group of first gas collection pipes. The second pressure pump is installed on the first recovery pipe.

[0022] In some implementations, to ensure that the soft manganese ore and coal mixture to be calcined can be stably input into the calcination furnace from the upstream end of the calcination furnace, and to ensure that the product after calcination can be output to the heat exchange device from the downstream end of the calcination furnace, the following technical solutions are provided.

[0023] The upstream end of the calcination furnace is fixedly connected with a first feeding hopper, and the downstream end of the calcination furnace is fixedly connected with a first discharging hopper. The bottom of the discharging hopper is connected with a connecting pipeline, which is in communication with the inner sleeve.

[0024] In some implementations, to ensure that the second exhaust gas collection assembly effectively collects the high-temperature exhaust gas generated by the calcination process, the following technical solutions are provided for the second exhaust gas collection assembly.

[0025] The second exhaust gas collection assembly includes a second gas collection pipe, a second recovery pipe, and a third pressure pump. The second gas collection pipe includes multiple groups arranged side by side, and is connected to the top of the calcination furnace. The second recovery pipe is connected to each group of second gas collection pipes. The third pressure pump is installed on the second recovery pipe.

[0026] In some implementations, to ensure that the feeding mechanism can stably transport the material input into the calcination furnace, and to assist the calcination furnace in calcining and reducing the material, the following technical solutions are provided for the feeding mechanism.

[0027] The bottom of the calcination furnace is provided with two groups of arc-shaped grooves arranged side by side. The feeding mechanism includes a first mounting shaft, a stirring shaft, and a reduction motor. The first mounting shaft includes two groups arranged side by side, and is rotatably installed in the calcination furnace and arranged concentrically with the arc-shaped grooves. The first mounting shaft is fixedly connected with a first spiral conveying blade. The stirring shaft includes multiple groups arranged side by side, each group of stirring shafts is rotatably installed in the calcination furnace and arranged above the first mounting shaft, and the stirring shaft is arranged vertically with the first mounting shaft. The stirring shaft is fixedly connected with a stirring blade. The reduction motor is connected with the first mounting shaft and the stirring shaft through a transmission mechanism.

[0028] In some implementations, to ensure that the reduction motor can drive the first mounting shaft and the stirring shaft to operate stably, the following technical solutions are provided for the transmission mechanism.

[0029] The transmission mechanism comprises a transmission sprocket, a drive sprocket, a transmission gear, a rotating gear, a first bevel gear, a second bevel gear, the same end of each of the two groups of first mounting shafts is fixedly connected with a transmission gear, and the two groups of transmission gears are in meshing connection, the speed reducer motor is in power connection with one of the first mounting shafts, the same end of each of the stirring shafts is fixedly connected with a transmission sprocket, the rotating gears comprise two groups in meshing connection, one of the groups of rotating gears is coaxially fixedly connected with the first bevel gear, and the other group is fixedly connected to the first mounting shaft, the drive sprocket is coaxially fixedly connected with the second bevel gear and is rotatably installed outside the roasting furnace, the first bevel gear is in meshing connection with the second bevel gear, and the drive sprocket and each group of transmission sprockets are in chain transmission through a chain.

[0030] In some embodiments, in order to ensure that the counter transmission mechanism can fully exchange heat with the mixture before roasting and the product after roasting, the following technical solutions are provided.

[0031] The inner sleeve is rotatably installed in the outer sleeve, the upstream end of the outer sleeve is fixedly connected with a second feeding hopper, and the downstream end of the outer sleeve is fixedly connected with a second discharging hopper; the counter transmission mechanism comprises a second mounting shaft, a second spiral conveying blade, a third spiral conveying blade, and a drive motor, the second mounting shaft is rotatably installed at the axis of the inner sleeve, the second spiral conveying blade is fixedly installed on the second mounting shaft and is attached to the inner wall of the inner sleeve, the third spiral conveying blade is fixedly installed on the outer sidewall of the inner sleeve and is attached to the inner wall of the outer sleeve, and the drive motor is linked with the second mounting shaft and the inner sleeve through a drive mechanism.

[0032] In some embodiments, in order to ensure that the drive motor can stably drive the second mounting shaft and the inner sleeve to operate through the drive mechanism, the following technical solutions are provided.

[0033] The drive mechanism comprises a first rotating sprocket, a second rotating sprocket, a first drive gear, and a second drive gear, the first rotating sprocket is fixedly connected to the rotating shaft of the drive motor, the second rotating sprocket is fixedly connected to the end of the second mounting shaft, the first rotating sprocket and the second rotating sprocket are in chain transmission through a chain, the first drive gear is fixedly connected to the periphery of the inner sleeve, the second drive gear is coaxially fixedly connected with the first rotating sprocket, and the first drive gear is in meshing connection with the second drive gear.

[0034] When the drive motor works, the first rotating sprocket and the first drive gear are driven to rotate, the first rotating sprocket drives the second rotating sprocket and the second mounting shaft to synchronously rotate, and the first drive gear drives the second drive gear and the inner sleeve to stably rotate.

[0035] The beneficial effects of the present application: the provided preparation method and preparation device of high-purity manganese carbonate are used as the basis for production, the high-temperature manganese monoxide product generated by roasting is used for heat exchange with the mixture of soft manganese ore and coal powder, the high-temperature waste gas generated during the roasting process and the combustion of methane is collected through the first and second waste gas collection assemblies, the remaining heat can provide heat for the mixing process of sulfuric acid solution and manganese monoxide, the decomposition of ammonium sulfate salt, and the drying process, the ammonia gas generated by heating the ammonium sulfate salt solution and the carbon dioxide in the waste gas can be used as the raw material for the production of ammonium carbonate salt, and the generated sulfuric acid can be used as the supply source of the required sulfuric acid solution. In each production link of high-purity manganese carbonate, the waste heat and by-products can be efficiently utilized, and the social demand for green and environmentally friendly production of high-purity manganese carbonate can be met. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is the appearance structure schematic diagram of the preparation device in the present application;

[0037] Figure 2 It is the appearance structure schematic diagram of the combination of the combustion device and the roasting device;

[0038] Figure 3 It is the appearance structure schematic diagram of the heat exchange device;

[0039] Figure 4 It is the appearance structure schematic diagram of the combustion device;

[0040] Figure 5 It is the structure schematic diagram of the gas distribution pipe (part) and the gas supply assembly;

[0041] Figure 6 It is the structure schematic diagram of the first waste gas collection assembly (part);

[0042] Figure 7 It is the structure schematic diagram of the roasting furnace after being cut;

[0043] Figure 8 It is the structure schematic diagram of the second waste gas collection assembly (part);

[0044] Figure 9 It is the structure schematic diagram of the feeding mechanism (part) and the matching transmission mechanism;

[0045] Figure 10 It is the structure schematic diagram of another view of the figure 9;

[0046] Figure 11 It is the structure schematic diagram of the heat exchange device part assembly;

[0047] Figure 12 It is the structure schematic diagram of the A part in the figure 9; Figure 11

[0048] ​Figure 13 Structure diagram of the conveying mechanism (part).

[0049] In the figure: 1 combustion device, 11 combustion furnace, 12 air distribution pipe, 121 air injection port, 13 first exhaust gas collection assembly, 131 first gas collecting pipe, 132 first recovery pipe, 133 second pressure pump, 14 gas supply assembly, 141 gas pipe, 142 air pipe, 143 first pressure pump, 2 calcination device, 21 calcination furnace, 211 first feeding hopper, 212 first discharging hopper, 213 connecting pipeline, 214 arc-shaped groove, 22 feeding mechanism, 221 first mounting shaft, 222 stirring shaft, 223 speed reducer, 224 first spiral conveying blade, 225 stirring blade, 23 second exhaust gas collection assembly, 231 second gas collecting pipe, 232 second recovery pipe, 233 third pressure pump, 241 transmission sprocket, 242 drive sprocket, 243 transmission gear, 244 rotating gear, 245 first bevel gear, 246 second bevel gear, 3 heat exchange device, 31 outer sleeve, 311 second feeding hopper, 312 second discharging hopper, 32 inner sleeve, 331 second mounting shaft, 332 second spiral conveying blade, 333 third spiral conveying blade, 334 drive motor, 341 mounting seat, 342 discharging pipeline, 351 first rotating sprocket, 352 second rotating sprocket, 353 first drive gear, 354 second drive gear. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0051] Please refer to Figures 1-13 The step design, structure design and operation principle of the present application will be described below in combination with the following embodiments.

[0052] Embodiment 1

[0053] A preparation method of high-purity manganese carbonate, comprising the following steps:

[0054] S1, selecting the crushed soft manganese ore, removing the calcium, magnesium, iron and aluminum impurities in the soft manganese ore after the sulfuric acid pretreatment and ore washing treatment;

[0055] S2, mixing the product obtained in step S1 with coal powder and then preheating, and then performing calcination treatment, using methane as raw material in the calcination treatment, controlling the calcination temperature to be 300°C, generating high-temperature manganese monoxide product, and performing heat exchange between the obtained high-temperature manganese monoxide and the product obtained in step S1, so as to realize the preheating of the product obtained in step S1;

[0056] S3, the product obtained in step S2 is immersed in a sulfuric acid solution, the high-temperature waste gas generated by the combustion and roasting of methane is collected and heat-exchanged with the sulfuric acid solution to maintain the temperature of the sulfuric acid solution at 80°C, and a manganese sulfate solution is generated;

[0057] S4, solid-liquid separation is performed on the product obtained in step S3 to remove the solid impurities therein;

[0058] S5, the waste gas after heat exchange in step S3 is collected, and an ammonium carbonate salt solution is generated after reaction with ammonia water;

[0059] S6, after the ammonium carbonate salt solution is fully mixed and reacted with the solution obtained in step S4, a manganese carbonate precipitate and an ammonium sulfate salt solution are generated, the ammonium sulfate salt solution is heated to evaporate ammonia gas and generate a sulfuric acid solution, the ammonia gas is supplemented to the ammonia water required in step S5, and the sulfuric acid solution is supplemented to the sulfuric acid required in step S5;

[0060] S7, the manganese carbonate precipitate obtained in step S6 is washed and dried to obtain a high-purity manganese carbonate precipitate.

[0061] The soft manganese ore after sulfuric acid pretreatment and ore washing treatment can effectively improve the purity of the manganese dioxide contained therein, the manganese dioxide and the coal powder are fully mixed, and after preheating treatment, roasting reduction is performed, and then the manganese dioxide (tetravalent manganese) is reduced to manganese monoxide (divalent manganese), the manganese monoxide can be fully dissolved in the sulfuric acid solution to generate manganese sulfate, so that the insoluble impurities are effectively removed, and then the ammonium carbonate salt (mainly ammonium bicarbonate and ammonium carbonate) solution is fully mixed and reacted with the manganese sulfate solution to generate a manganese carbonate precipitate, and after washing (including acid washing and water washing) and drying, a high-purity manganese carbonate product is generated.

[0062] To ensure effective utilization of the waste heat of the high-temperature waste gas generated by the combustion and roasting of methane, the high-temperature waste gas collected in step S3 can also be heated to generate the ammonium sulfate salt in step S6 to evaporate ammonia gas and generate a sulfuric acid solution, and can also provide heat for the drying process in step S7.

[0063] The sulfuric acid solution obtained in step S6 can also be supplemented to step S2 to pretreat the soft manganese ore with the sulfuric acid solution.

[0064] In step S5, the generation of ammonium carbonate salt is affected by the amount of carbon dioxide input, and the product is ammonium bicarbonate and ammonium carbonate. Correspondingly, the ammonium sulfate salt is ammonium sulfate and ammonium bisulfate.

[0065] Example 2

[0066] The application discloses a preparation device of high-purity manganese carbonate, which comprises a combustion device 1, a calcination device 2 and a heat exchange device 3 which are combined together, the combustion device 1 comprises a combustion furnace 11, a gas distribution pipe 12 and a first waste gas collecting assembly 13, the gas distribution pipe 12 is fixedly installed in the combustion furnace 11, and a gas supply assembly 14 is connected to the upstream end of the gas distribution pipe 12 in a matched mode, and the first waste gas collecting assembly 13 is installed on the combustion furnace 11 in a matched mode and collects high-temperature waste gas generated by combustion.

[0067] The calcination device 1 comprises a calcination furnace 21, a feeding mechanism 22 and a second waste gas collecting assembly 23, the calcination furnace 21 is arranged above the combustion furnace 11, the feeding mechanism 22 is installed in the calcination furnace 21 in a matched mode and is used for conveying the calcined material from the upstream end to the downstream end of the calcination furnace 21, and the second waste gas collecting assembly 23 is installed on the top of the calcination furnace 21 in a matched mode and collects high-temperature waste gas generated by calcination.

[0068] The heat exchange device 3 comprises a counter transmission mechanism and a concentrically combined outer sleeve 31 and inner sleeve 32, the inner sleeve 32 is connected with the downstream end of the combustion furnace 11 and receives the material after calcination treatment, the outer sleeve 31 conveys the material required for calcination, and the counter transmission mechanism is installed in the outer sleeve 31 and the inner sleeve 32 in a matched mode and conveys the corresponding material.

[0069] The combustion furnace 11 and the calcination furnace 21 are arranged in a strip-shaped structure, the strip-shaped structure can prolong the running time of the material in the calcination furnace 21, the combustion furnace 11 can continuously heat the calcination furnace 21, and thus the material can be fully calcined and reduced in the calcination furnace 21.

[0070] The combustion furnace 11 is used for burning methane gas to heat the calcination furnace 21, high-temperature waste gas generated by burning of the methane gas is collected by the first waste gas collecting assembly 13, the waste gas heat and the waste gas components are recycled, the calcination furnace 21 is applied to step S2, and the calcination and reduction treatment is conducted on the mixed and preheated pyrolusite and coal powder, the mixed material is conveyed from the upstream end to the downstream end of the calcination furnace 21 under the action of the feeding mechanism 22, and the calcination and reduction process is completed, high-temperature waste gas generated in the calcination process is collected by the second waste gas collecting assembly 23, and the waste gas heat and the waste gas components are recycled.

[0071] Manganese monoxide generated after the calcination treatment enters the inner sleeve 32, the mixture of the pyrolusite and the coal powder before entering the calcination furnace 21 is input into the outer sleeve 31, and the mixture of the pyrolusite and the coal powder flows in a counter direction under the action of the counter transmission mechanism, the mixture of the pyrolusite and the coal powder is fully heat-exchanged with the output high-temperature manganese monoxide product, and the preheating treatment is conducted on the mixture of the pyrolusite and the coal powder.

[0072] The high-temperature exhaust gas collected by the first exhaust gas collecting assembly 13 and the second exhaust gas collecting assembly 23 is applied in step S3 to exchange heat with the sulfuric acid solution involved therein, so that the sulfuric acid solution is maintained at 80°C. The high-temperature exhaust gas can also be applied in step S6 to heat the ammonium sulfate salt solution involved, so that ammonia gas is evaporated and the sulfuric acid solution is recycled; and the high-temperature exhaust gas can also be applied in the drying process in step S7 to dry the generated manganese carbonate.

[0073] After the high-temperature exhaust gas is cooled by heat exchange, it is applied in step S5, in which the contained carbon dioxide is mixed with ammonia gas or ammonia water as raw materials to produce ammonium carbonate and ammonium bicarbonate solution. The generated ammonium carbonate salt is applied in step S6 to be fully mixed and reacted with the manganese sulfate solution to generate manganese carbonate precipitate.

[0074] Embodiment 3

[0075] To ensure that the gas supply assembly 14 can stably supply fuel gas to the combustion furnace 11 for stable combustion of the combustion furnace 11, the following technical solutions about the gas supply assembly 14 are provided.

[0076] The gas supply assembly 14 includes a fuel gas pipe 141, an air pipe 142, and a first pressure pump 143. The upstream end of the air distribution pipe 12 is connected to the fuel gas pipe 141, the air pipe 142 is connected to the fuel gas pipe 141, and the first pressure pump 143 is installed on the air pipe 142 in a matched manner. The air distribution pipe 12 is uniformly provided with vertically arranged gas injection ports 121.

[0077] The fuel gas pipe 141 is used to transport pressurized natural gas, i.e., methane gas. A pressurizing pump is used to pressurize air and input it into the fuel gas pipe 141 through the air pipe 142, so that the natural gas is fully mixed with the air, uniformly input into the combustion furnace 11 through the air distribution pipe 12 and the gas injection ports 121 thereon, and ignited by a match igniter in the combustion furnace 11 to make the mixed gas of methane and air burn and heat, thereby ensuring stable heating of the calcination furnace 21.

[0078] To ensure that the first exhaust gas collecting assembly 13 can effectively collect the high-temperature exhaust gas generated by the combustion of methane gas, the following technical solutions about the first exhaust gas collecting assembly 13 are provided.

[0079] The first exhaust gas collecting assembly 13 includes a first gas collecting pipe 131, a first recovery pipe 132, and a second pressure pump 133. The first gas collecting pipe 131 includes multiple groups arranged side by side, and is connected to the top of the side wall of the combustion furnace 11. Each first recovery pipe 132 is connected to each group of first gas collecting pipes 131, and the second pressure pump 133 is installed on the first recovery pipe 132 in a matched manner.

[0080] The waste gas generated by the combustion of the methane gas is discharged from the combustion furnace 11 along the first gas collecting pipe 131 and the first recovery pipe 132 under the action of the second pressurizing pump 133, the first recovery pipe 132 comprises branch pipes and a main pipe, each first gas collecting pipe 131 is directly connected with a branch pipe, the branch pipes on both sides of the combustion furnace 11 are connected with the main pipe, and the second pressurizing pump 133 is installed on the main pipe of the first recovery pipe 132 in a matched mode.

[0081] The high-temperature waste gas generated by the combustion of the methane gas mainly comprises high-temperature water vapor and carbon dioxide, and the carbon dioxide is used as a main raw material for producing ammonium carbonate.

[0082] Embodiment 4

[0083] In order to ensure that the mixture of soft manganite and coal powder to be roasted can be stably input into the roasting furnace 21 from the upstream end of the roasting furnace 21 and that the product after the roasting treatment can be output to the heat exchange device 3 from the downstream end of the roasting furnace 21, the following technical scheme is provided.

[0084] The upstream end of the roasting furnace 21 is fixedly connected with a first feeding hopper 211, the downstream end of the roasting furnace 21 is fixedly connected with a first discharging hopper 212, the bottom of the discharging hopper is connected with a connecting pipeline 213, and the connecting pipeline 213 is in communication with the inner sleeve 32.

[0085] The mixture of soft manganite and coal powder is input into the roasting furnace 21 through the first feeding hopper 211, then a sealing cover can be installed at the first feeding hopper 211 to prevent the high-temperature waste gas from leaking out of the feeding hopper, the high-temperature manganese monoxide generated by the roasting treatment is output through the first discharging hopper 212 and then enters the inner sleeve 32 through the connecting pipeline 213, and the heat exchange treatment is performed by the heat exchange device 3.

[0086] In order to ensure that the second waste gas collecting assembly 23 can effectively collect the high-temperature waste gas generated by the roasting treatment, the following technical scheme about the second waste gas collecting assembly 23 is provided.

[0087] The second waste gas collecting assembly 23 comprises a second gas collecting pipe 231, a second recovery pipe 232 and a third pressurizing pump 233, the second gas collecting pipe 231 comprises multiple groups arranged side by side, the second gas collecting pipe 231 is connected to the top of the roasting furnace 21, the second recovery pipe 232 is connected with each group of the second gas collecting pipe 231, and the third pressurizing pump 233 is installed on the second recovery pipe 232 in a matched mode.

[0088] The waste gas generated by the roasting treatment is discharged from the roasting furnace 21 along the second gas collecting pipe 231 and the second recovery pipe 232 under the action of the third pressurizing pump 233, the second recovery pipe 232 comprises branch pipes and a main pipe, each second gas collecting pipe 231 is directly connected with a branch pipe, each branch pipe of the second recovery pipe 232 is connected with the main pipe, and the third pressurizing pump 233 is installed on the main pipe of the second recovery pipe 232 in a matched mode.

[0089] The high-temperature waste gas generated by the roasting treatment mainly contains high-temperature carbon monoxide and carbon dioxide. By treating the waste gas, the carbon monoxide is absorbed or converted into carbon dioxide, which is used as a main raw material for producing ammonium carbonate salt.

[0090] Embodiment 5

[0091] To ensure that the feeding mechanism 22 can stably transport the material input into the roasting furnace 21, and assist the roasting furnace 21 in roasting and reducing the material, the following technical solutions about the feeding mechanism 22 are provided.

[0092] The roasting furnace 21 is provided with two groups of arc-shaped grooves 214 arranged side by side. The feeding mechanism 22 includes a first mounting shaft 221, a stirring shaft, and a speed reducer 223. The first mounting shaft 221 includes two groups arranged side by side. The two groups of first mounting shafts 221 are rotationally installed in the roasting furnace 21 and arranged concentrically with the arc-shaped grooves 214. The first mounting shaft 221 is fixedly connected with a first spiral conveying blade 224. The stirring shaft includes multiple groups arranged side by side. Each group of stirring shafts is rotationally installed in the roasting furnace 21 and arranged above the first mounting shaft 221. The stirring shaft is arranged vertically with the first mounting shaft 221. The stirring shaft is fixedly connected with a stirring blade 225. The speed reducer 223 is connected with the first mounting shaft 221 and the stirring shaft through a transmission mechanism.

[0093] When the speed reducer 223 operates, the first mounting shaft 221 and the stirring shaft are stably rotated through the transmission mechanism. The outer edge of the first spiral conveying blade 224 is in contact with the arc-shaped groove 214, which ensures that the first spiral conveying blade 224 can stably transport the material therein. The stirring shaft drives the stirring blade 225 to rotate, which can stir the material between the two groups of spiral conveying blades to transfer the protruding material to the arc-shaped grooves 214 on both sides. At the same time, the material can be stirred to make the material therein uniformly heated.

[0094] The arrangement of the arc-shaped grooves 214 not only ensures the stable transportation of the material therein, but also increases the heating area to effectively heat the material.

[0095] To ensure that the speed reducer 223 can stably drive the first mounting shaft 221 and the stirring shaft to operate, the following technical solutions about the transmission mechanism are provided.

[0096] The transmission mechanism comprises a transmission sprocket wheel 241, a drive sprocket wheel 242, a transmission gear 243, a rotating gear 244, a first bevel gear 245, a second bevel gear 246, the same end of the two groups of first mounting shafts 221 is fixedly connected with the transmission gear 243, and the two groups of transmission gears 243 are in meshing connection, the speed reducer motor 223 is in power connection with one group of first mounting shafts 221, the same end of each group of stirring shafts is fixedly connected with the transmission sprocket wheel 241, the rotating gear 244 comprises two groups in meshing connection, one group of rotating gears 244 is coaxially fixedly connected with the first bevel gear 245, and the other group is fixedly connected to the first mounting shaft 221, the drive sprocket wheel 242 is coaxially fixedly connected with the second bevel gear 246 and is rotatably installed outside the roasting furnace 21, the first bevel gear 245 is in meshing connection with the second bevel gear 246, and the drive sprocket wheel 242 and each group of transmission sprocket wheels 241 are in chain transmission through a chain.

[0097] When the speed reducer motor 223 works, the first mounting shaft 221 directly connected with the speed reducer motor 223 is driven to stably rotate, and then another group of first mounting shafts 221 is driven to stably rotate through the combination of the transmission gear 243, since the two groups of first mounting shafts 221 are opposite in the rotating direction, the spiral directions of the two groups of first spiral conveying leaves 224 are opposite, and then the materials in the two groups of first spiral conveying leaves 224 are stably conveyed.

[0098] When the first mounting shaft 221 rotates, the rotating gear 244 and the first bevel gear 245 fixedly connected with the rotating gear 244 are driven to stably rotate, then the second bevel gear 246 and the drive sprocket wheel 242 are driven to stably rotate, and when the drive sprocket wheel 242 rotates, each transmission sprocket wheel 241, the stirring shaft and the stirring blade 225 are driven to stably rotate through the chain.

[0099] Embodiment 6

[0100] In order to ensure that the opposite conveying mechanism can fully exchange heat for the mixed materials before roasting and the products after roasting, the following technical scheme is provided.

[0101] The inner sleeve 32 is rotatably installed in the outer sleeve 31, the upstream end of the outer sleeve 31 is fixedly connected with the second feeding hopper 311, and the downstream end of the outer sleeve 31 is fixedly connected with the second discharging hopper 312; the opposite conveying mechanism comprises a second mounting shaft 331, a second spiral conveying leaf 332, a third spiral conveying leaf and a driving motor 334, the second mounting shaft 331 is rotatably installed at the axis of the inner sleeve 32, the second spiral conveying leaf 332 is fixedly installed on the second mounting shaft 331 and is in abutment with the inner wall of the inner sleeve 32, the third spiral conveying leaf is fixedly installed on the outer sidewall of the inner sleeve 32 and is in abutment with the inner wall of the outer sleeve 31, and the driving motor 334 is linked with the second mounting shaft 331 and the inner sleeve 32 through a driving mechanism.

[0102] When the driving motor 334 is running, the inner sleeve 32 and the second mounting shaft 331 are driven to rotate in opposite directions by the driving mechanism, the second mounting shaft 331 extends into the connecting pipe 213, and the calcined product (manganese monoxide) entering the connecting pipe 213 is outputted outward along the inner sleeve 32 under the action of the second spiral conveying blade 332, while the mixture (mixture of soft manganese ore and coal powder) is inputted from the second feeding hopper 311, and the mixture is outputted from the second discharging hopper 312 under the rotation of the third spiral conveying blade driven by the inner sleeve 32, so that the mixture can be effectively preheated by the calcined product, and the mixture outputted from the second discharging hopper 312 is inputted into the calcining furnace 21 from the first feeding hopper 211 for calcination treatment.

[0103] The mounting seat 341 is arranged at the downstream end of the inner sleeve 32, and the discharging pipe 342 is fixedly connected to the mounting seat 341, the discharging pipe 342 is in butt joint with the downstream end of the inner sleeve 32, and the end of the second mounting shaft 331 is rotatably mounted to the mounting seat 341.

[0104] To ensure that the driving motor 334 can stably drive the second mounting shaft 331 and the inner sleeve 32 to run through the driving mechanism, the following technical solutions are provided.

[0105] The driving mechanism comprises a first rotating sprocket 351, a second rotating sprocket 352, a first driving gear 353, and a second driving gear 354, the first rotating sprocket 351 is fixedly connected to the rotating shaft of the driving motor 334, the second rotating sprocket 352 is fixedly connected to the end of the second mounting shaft 331, the first rotating sprocket 351 and the second rotating sprocket 352 are in chain transmission through a chain, the first driving gear 353 is fixedly connected to the periphery of the inner sleeve 32, the second driving gear 354 is coaxially fixedly connected to the first rotating sprocket 351, and the first driving gear 353 is in meshing connection with the second driving gear 354.

[0106] When the driving motor 334 is working, the first rotating sprocket 351 and the second driving gear 354 are driven to rotate, the first rotating sprocket 351 drives the second rotating sprocket 352 and the second mounting shaft 331 to synchronously rotate, and the second driving gear 354 drives the first driving gear 353 and the inner sleeve 32 to stably rotate.

[0107] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced in the present application. Any reference signs in the claims should not be considered as limiting the involved claims.

[0108] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. An apparatus for preparing high-purity manganese carbonate, characterized in that: The system includes a combined combustion device, a roasting device, and a heat exchange device. Both the combustion furnace and the roasting furnace are elongated structures. The combustion device includes a combustion furnace, a gas distribution pipe, and a first waste gas collection assembly. The gas distribution pipe is fixedly installed in the combustion furnace, and a gas supply assembly is connected to its upstream end. The first waste gas collection assembly is installed on the combustion furnace and collects the high-temperature waste gas generated during combustion. The roasting device includes a roasting furnace, a feeding mechanism, and a second waste gas collection assembly. The roasting furnace is mounted above the combustion furnace. The feeding mechanism is installed in the roasting furnace and used to transport the roasted material from its upstream end to its downstream end. The second waste gas collection assembly is installed at the top of the roasting furnace and collects the high-temperature waste gas generated during roasting. The heat exchange device includes a counter-transmission mechanism and a concentrically combined outer and inner sleeve. The inner sleeve is connected to the downstream end of the combustion furnace and receives the roasted material. The outer sleeve carries the material required for roasting. The counter-transmission mechanism is installed in the outer and inner sleeves and carries the corresponding material. The gas supply assembly includes a gas pipe, an air pipe, and a first pressurizing pump. The upstream end of the gas distribution pipe is connected to the gas pipe, the air pipe is connected to the gas pipe, and the first pressurizing pump is installed on the air pipe. Vertically arranged air jets are evenly distributed on the gas distribution pipe. The first exhaust gas collection assembly includes a first gas collection pipe, a first recovery pipe, and a second pressurizing pump. The first gas collection pipe includes multiple sets arranged side by side, and the first gas collection pipe is connected to the top of the side wall of the combustion furnace. Each first recovery pipe is connected to each set of first gas collection pipes, and the second pressurizing pump is installed on the first recovery pipe. The top of the upstream end of the roasting furnace is fixedly connected to a first feed hopper, and the bottom of the roasting furnace is fixedly connected to a first discharge hopper. A connecting pipe is connected to the bottom of the discharge hopper, and the connecting pipe is connected to the inner sleeve. The second exhaust gas collection assembly includes a second gas collection pipe, a second recovery pipe, and a third pressurizing pump. The second gas collection pipe includes multiple sets arranged side by side and is connected to the top of the roasting furnace. The second recovery pipe is connected to each set of second gas collection pipes. The third pressurizing pump is installed on the second recovery pipe. The bottom of the roasting furnace is provided with two sets of arc-shaped grooves arranged side by side. The feeding mechanism includes a first mounting shaft, a stirring shaft, and a reduction motor. The first mounting shaft includes two sets arranged side by side. The two sets of first mounting shafts are rotatably installed in the roasting furnace and are arranged concentrically with the arc-shaped grooves. A first spiral conveying blade is fixedly connected to the first mounting shaft. The stirring shaft includes multiple sets arranged side by side. Each set of stirring shafts is rotatably installed in the roasting furnace and arranged above the first mounting shaft. The stirring shaft is arranged perpendicular to the first mounting shaft. A stirring blade is fixedly connected to the stirring shaft. The reduction motor is linked to the first mounting shaft and the stirring shaft through a transmission mechanism. The inner sleeve is rotatably installed in the outer sleeve. A second feed hopper is fixedly connected to the upstream end of the outer sleeve, and a second discharge hopper is fixedly connected to the downstream end of the outer sleeve. The opposing transmission mechanism includes a second mounting shaft, a second spiral conveying blade, a third spiral conveying blade, and a drive motor. The second mounting shaft is rotatably installed at the center of the inner sleeve. The second spiral conveying blade is fixedly installed on the second mounting shaft and fits against the inner wall of the inner sleeve. The third spiral conveying blade is fixedly installed on the outer wall of the inner sleeve and fits against the inner wall of the outer sleeve. The drive motor is linked to the second mounting shaft and the inner sleeve through a drive mechanism.

2. The apparatus for preparing high-purity manganese carbonate according to claim 1, characterized in that: The transmission mechanism includes a transmission sprocket, a drive sprocket, a transmission gear, a rotating gear, a first bevel gear, and a second bevel gear. Transmission gears are fixedly connected to the same end of both sets of the first mounting shafts, and the two sets of transmission gears maintain a meshing connection. The reduction motor is poweredly connected to one set of the first mounting shafts. A transmission sprocket is fixedly connected to the same end of each set of stirring shafts. The rotating gear includes two meshing sets, one set of rotating gears being coaxially fixed to the first bevel gear, and the other set being fixed to the first mounting shaft. The drive sprocket is coaxially fixed to the second bevel gear and rotatably mounted on the outside of the roasting furnace. The first bevel gear and the second bevel gear maintain a meshing connection. The drive sprocket and each set of transmission sprockets achieve chain transmission via a chain.

3. The apparatus for preparing high-purity manganese carbonate according to claim 1, characterized in that: The drive mechanism includes a first rotating sprocket, a second rotating sprocket, a first drive gear, and a second drive gear. The first rotating sprocket is fixed to the shaft of the drive motor, and the second rotating sprocket is fixed to the end of the second mounting shaft. The first rotating sprocket and the second rotating sprocket are driven by a chain. The first drive gear is fixed to the periphery of the inner sleeve, and the second drive gear is coaxially fixed to the first rotating sprocket and meshes with it.

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