Dust treatment device and lepidolite mixed roasting treatment method

Abstract

The invention provides a dust treatment device and a lepidolite mixed roasting treatment method. Relates to the field of dust treatment, in particular to a dust treatment device which comprises a treatment box, and a first air inducing opening, a first sewage draining opening, a second air inducing opening and a second sewage draining opening are formed in the bottom of the treatment box. According to the dust treatment device and the lepidolite mixed roasting treatment method, three air pressure sensors are arranged to detect the pressure difference, an air cylinder is started to switch a filter plate to filter dusty gas, and a push plate is arranged to drive an opening and closing plate to gradually close an air inlet till the air inlet is completely closed and then is opened again in the filter plate switching process; the problem that unfiltered dust-containing gas directly escapes from an open waste discharge port to cause cleaning failure is avoided, a first baffle and a second baffle are arranged to control two first switches to automatically start a cleaning motor to clean a blocked filter plate, and the cleaning efficiency is improved while the mixing continuity is guaranteed. Dust is prevented from escaping and the environment is protected while dust treatment is achieved and the polluted environment is controlled.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of dust control, and in particular to a dust control device and a mixed roasting treatment method of lepidolite. BACKGROUND

[0002] Lithium is an important strategic metal resource, which is widely used in lithium-ion batteries, glass ceramics, lubricating grease, nuclear industry, aerospace and other fields. Lepidolite is one of the important mineral raw materials for extracting lithium. The content of lithium is usually between 1.5-3.5wt%, and it is associated with valuable elements such as potassium, rubidium and cesium, which has high comprehensive utilization value. In the crystal structure of lepidolite, lithium mainly exists in the aluminum silicate layer, while potassium, rubidium and cesium exist in the form of interlayer cations. At present, the main processes for extracting lithium from lepidolite include limestone roasting, sulfuric acid method, pressure cooking method, sulfate roasting method and chlorination roasting method. The limestone roasting method has the problems of large amount of waste residue and complex impurity removal. The sulfuric acid method faces the challenges of high environmental pressure and high acid and alkali consumption. The pressure cooking method consumes a large amount of carbon dioxide and has harsh reaction conditions. The sulfate roasting method is currently more widely used in industry, which can obtain high lithium leaching rate, but its main problem is that the large amount of sulfate additive leads to high cost and large amount of residue, and the recovery efficiency of associated valuable elements such as rubidium and cesium is low. Compared with the above methods, the chlorination roasting method can effectively extract lithium and rubidium and cesium, and the amount of waste residue is small, so it is considered to be a method with development potential. The existing chlorination roasting process mainly uses single chlorination salt (such as calcium chloride) as a roasting additive, but it cannot effectively solve the problems of large amount of chlorination agent and recovery of associated elements. Therefore, it is necessary to mix lepidolite concentrate with calcium chloride, potassium chloride and calcium hydroxide in proportion. During the mechanical mixing (such as using V-type mixer, three-dimensional mixer, etc.), dust is inevitably generated, especially the dust of calcium hydroxide and lepidolite concentrate, which is irritating to the respiratory system of human body and needs to be controlled. The existing dust control device drives the partition plate and the filter plate to move left and right in the guide shell through an electric push rod, switches the path of the incoming airflow and the filter plate of the filtered airflow, so that one of the filter plates filters the dust, and the other filter plate is cleaned by the vibration assembly, so that the filter plate for filtering dust remains clean and efficient.

[0003] However, during the process of moving the partition plate to switch the filter plate to filter the dust, the dust-containing airflow continues to enter through the open inlet during the movement of the partition plate, resulting in the direct escape of unfiltered dust-containing gas from the open waste outlet, which leads to cleaning failure.

[0004] Therefore, it is necessary to provide a dust control device and a mixed roasting treatment method of lepidolite to solve the above technical problems.

[0005] SUMMARY DETAILED DESCRIPTION

[0006] The dust treatment device and the mixed calcination treatment method of lepidolite can solve the problem of cleaning failure caused by the unfiltered dust-containing gas directly escaping from the open exhaust port.

[0007] To solve the above technical problems, the dust treatment device provided by the application comprises a treatment box, a first air inlet, a first exhaust port, a second air inlet and a second exhaust port are arranged on the bottom of the treatment box, a first air bellow and a second air bellow are fixedly installed on the bottom of the first air inlet and the second air inlet respectively, a wind inlet is communicated with one side of the treatment box, and the dust treatment device further comprises: three wind pressure sensors, which are arranged on the inner wall of the wind inlet and one side of the inner wall of the first air bellow and the second air bellow respectively.

[0008] A sliding groove is arranged on the top of the treatment box.

[0009] An opening and closing mechanism is rotatably installed on the inner wall of the wind inlet, the opening and closing mechanism comprises an opening and closing column, the opening and closing column is rotatably installed on the inner wall of the wind inlet, the top end of the opening and closing column penetrates the inner wall of the wind inlet and extends to the outside, an opening and closing plate is arranged on the surface of the opening and closing column inside the wind inlet, a disc is fixedly installed on the top end of the opening and closing column, and an opening and closing connecting rod is rotatably installed on the top of the disc through a convex shaft.

[0010] A driving mechanism is fixedly installed on the top of the treatment box, the driving mechanism comprises a cylinder, the cylinder is fixedly installed on the top of the treatment box, a push plate is fixedly installed on the output end of the cylinder, the two sides of the push plate are slidably connected with the inside of the sliding groove, a connecting plate is fixedly installed on the bottom of the push plate, and the convex shaft and the push plate are rotatably connected through the opening and closing connecting rod.

[0011] A filtering mechanism is arranged for filtering dust-containing gas.

[0012] A cleaning mechanism is arranged for cleaning the filtering mechanism.

[0013] An air inlet mechanism is arranged for inhaling dust-containing gas into the inside of the treatment box.

[0014] Two first switches are fixedly installed on the two sides of the inner wall of the treatment box.

[0015] Preferably, the filtering mechanism is fixedly installed on one side of the connecting plate, the filtering mechanism comprises a driving plate, the driving plate is fixedly installed on one side of the connecting plate, four connecting rods are fixedly installed inside the driving plate, first and second filter plates are fixedly installed at two ends of the four connecting rods respectively, a first baffle is fixedly installed on one side of the first filter plate, the first baffle is installed in matched mode with the first air inlet and the first pollution outlet, a second baffle is fixedly installed on one side of the second filter plate, and the second baffle is installed in matched mode with the second air inlet and the second pollution outlet.

[0016] Preferably, two cleaning mechanisms are symmetrically rotatably installed on two sides of the inner wall of the treatment box, the cleaning mechanism comprises a rotating column, the rotating column is rotatably installed on two sides of the inner wall of the treatment box, one end of the rotating column penetrates through the inner wall of the treatment box and extends to the outside, a cleaning motor is fixedly connected to one end of the rotating column outside the treatment box, the cleaning motor is fixedly installed on one side of the treatment box through a support, a fixing sleeve is fixedly installed on the surface of the rotating column, a cleaning shaft is rotatably installed at the bottom of the fixing sleeve, and three cleaning hammers are fixedly installed on the surface of the cleaning shaft through three rotating sleeves respectively.

[0017] Preferably, an air inlet mechanism is communicated with one side of the first and second air boxes, the air inlet mechanism comprises an air inlet pipe and an air inlet motor, two ends of the air inlet pipe are communicated with one side of the first and second air boxes respectively, an air outlet pipe is communicated with the middle portion of the air inlet pipe, the air inlet motor is arranged on the ground through a support, an output shaft of the air inlet motor penetrates through the outer wall of the air inlet pipe and extends to the inside of the air outlet pipe, and a fan blade is fixedly installed on the output shaft of the air inlet motor.

[0018] Preferably, four horizontal grooves are symmetrically formed on two sides of the inner wall of the treatment box, two back-blowing mechanisms are symmetrically and slidably installed inside the four horizontal grooves, the back-blowing mechanism comprises a back-blowing column, the back-blowing column is slidably installed at two ends inside the two horizontal grooves, the back-blowing column is rotatably installed on the surface of the cleaning shaft through two back-blowing connecting rods, the back-blowing column is fixedly connected with the two back-blowing connecting rods, two air pressure nozzles are fixedly installed inside the back-blowing column, air supply pipes are communicated with the input ends of the two air pressure nozzles, and the air supply pipes penetrate through the inner wall of the treatment box and extend to the outside.

[0019] Preferably, two recovery mechanisms are communicated with the air inlet pipe, the recovery mechanism comprises a negative pressure pipe, one end of the negative pressure pipe is communicated with the outer wall of the air inlet pipe, the other end of the negative pressure pipe is communicated with a recovery box, the recovery box is arranged on the ground, a filter screen is arranged inside the negative pressure pipe, and a discharge pipe is communicated with one side of the recovery box.

[0020] Preferably, two second switches are fixedly installed on two sides of the inner wall of the treatment box, and the two second switches are used for controlling the start and stop of the four air pressure nozzles respectively.

[0021] Preferably, the output end of the air outlet pipe is communicated with a gas storage mechanism, the gas storage mechanism comprises a gas storage tank, the top of the gas storage tank is communicated with a pressure relief valve, and the two sides of the gas storage tank are respectively communicated with a first gas conveying pipe and a second gas conveying pipe.

[0022] A lithium mica mixed roasting treatment method, comprising the following steps:

[0023] S1: mechanically mixing lithium mica concentrate with calcium chloride, potassium chloride and calcium hydroxide to obtain a mixture; wherein, based on the mass of the lithium mica concentrate, the addition amount of calcium chloride is 10-30wt%, the addition amount of potassium chloride is 5-20wt%, and the addition amount of calcium hydroxide is 20-40wt%;

[0024] S2: placing the mixture obtained in S1 in a roasting device to perform roasting treatment under an air atmosphere, the roasting temperature is 700-900 DEG C, the roasting time is 1-6h, and the heating rate is 10-20 DEG C / min;

[0025] S3: after the roasting is completed, the product is cooled to room temperature to obtain a roasting clinker.

[0026] Preferably, in S1, based on the mass of the lithium mica concentrate, the addition amount of calcium chloride is 15-25wt%, the addition amount of potassium chloride is 8-15wt%, and the addition amount of calcium hydroxide is 25-35wt%, the calcium chloride and the potassium chloride constitute a chlorinating agent component, the total addition amount of which is 20-50wt%, and the addition amount of the calcium hydroxide is 25-35wt%, and in S2, the roasting device is a muffle furnace.

[0027] Compared with the related art, the dust treatment device provided by the application has the following beneficial effects:

[0028] The dust treatment device provided by the application has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 Structure diagram of a preferred embodiment of a dust control device according to the present application;

[0030] Figure 2 Structure diagram of another preferred embodiment of a dust control device according to the present application;

[0031] Figure 3 Structure diagram of a preferred embodiment of a dust control device according to the present application; Figure 2 Position diagram of the first air inlet shown in the figure;

[0032] Figure 4 Structure diagram of a preferred embodiment of a dust control device according to the present application; Figure 2 Installation diagram of the air pressure sensor shown in the figure;

[0033] Figure 5 Structure diagram of a preferred embodiment of a dust control device according to the present application; Figure 4 Structure diagram of the opening and closing mechanism shown in the figure;

[0034] Figure 6 Structure diagram of a preferred embodiment of a dust control device according to the present application; Figure 4 Structure diagram of the driving mechanism shown in the figure;

[0035] Figure 7 Structure diagram of a preferred embodiment of a dust control device according to the present application; Figure 4 Structure diagram of the filtering mechanism shown in the figure;

[0036] Figure 8 Structure diagram of a preferred embodiment of a dust control device according to the present application; Figure 1 Position diagram of the transverse groove shown in the figure;

[0037] Figure 9 Structure diagram of a preferred embodiment of a dust control device according to the present application; Figure 1 Structure diagram of the cleaning mechanism shown in the figure;

[0038] Figure 10 Structure diagram of a preferred embodiment of a dust control device according to the present application; Figure 1 Structure diagram of the air inlet mechanism shown in the figure;

[0039] Figure 11 Structure diagram of a preferred embodiment of a dust control device according to the present application;

[0040] Figure 12 Structure diagram of a preferred embodiment of a dust control device according to the present application; Figure 11 Installation diagram of the second switch shown in the figure;

[0041] Figure 13 Installation diagram of the recycling mechanism shown in the figure; Figure 12 Installation diagram of the back flushing mechanism and the cleaning mechanism shown in the figure;

[0042] Figure 14 Installation diagram of the back flushing mechanism and the cleaning mechanism shown in the figure; Figure 12 Installation diagram of the back flushing mechanism and the cleaning mechanism shown in the figure;

[0043] Figure 15 Installation diagram of the back flushing mechanism and the cleaning mechanism shown in the figure; Figure 14Structure schematic view of the back flushing mechanism shown;

[0044] Figure 16 For Figure 12 Structure schematic view of the gas storage mechanism shown;

[0045] Figure 17 For Figure 12 Structure schematic view of the recycling mechanism shown.

[0046] In the figure, the label: 1, treatment box, 2, air inlet, 3, opening and closing mechanism, 301, opening and closing column, 302, opening and closing plate, 303, disc, 304, convex shaft, 305, opening and closing connecting rod, 4, driving mechanism, 401, air cylinder, 402, push plate, 403, connecting plate, 5, filtering mechanism, 501, driving plate, 502, connecting rod, 503, first filter plate, 504, first baffle, 505, second filter plate, 506, second baffle, 6, cleaning mechanism, 601, rotating column, 602, cleaning motor, 603, fixed sleeve, 604, cleaning shaft, 605, rotating sleeve, 606, cleaning hammer, 7, back flushing mechanism, 701, back flushing column, 702, back flushing connecting rod, 703, air pressure nozzle, 704, air supply pipe, 8, air guide mechanism, 801, air inlet pipe, 802, air outlet pipe, 803, air guide motor, 804, fan blade, 9, recycling mechanism, 901, recycling box, 902, negative pressure pipe, 903, filter screen, 904, discharge pipe, 10, chute, 11, first air inlet, 12, first sewage outlet, 13, second air inlet, 14, second sewage outlet, 15, air pressure sensor, 16, first switch, 17, second switch, 18, gas storage mechanism, 1801, gas storage tank, 1802, pressure relief valve, 1803, first gas supply pipe, 1804, second gas supply pipe, 19, first air box, 20, second air box, 21, horizontal groove. DETAILED DESCRIPTION

[0047] The application will be further described below in conjunction with the drawings and embodiments.

[0048] First embodiment

[0049] Please refer to the drawings- Figure 10 A dust treatment device, comprising a treatment box 1, the bottom of the treatment box 1 is provided with a first air inlet 11, a first sewage outlet 12, a second air inlet 13 and a second sewage outlet 14, the bottom of the first air inlet 11 and the second air inlet 13 is respectively fixedly installed with a first air box 19 and a second air box 20, one side of the treatment box 1 is communicated with an air inlet 2, further comprising: an air pressure sensor 15, three air pressure sensors 15 are respectively arranged on the inner wall of the air inlet 2 and one side of the inner wall of the first air box 19 and the second air box 20;

[0050] A sliding groove 10 is formed in the top of the treatment box 1.

[0051] An opening and closing mechanism 3 is rotatably installed on the inner wall of the air inlet 2. The opening and closing mechanism 3 comprises an opening and closing column 301 rotatably installed on the inner wall of the air inlet 2. The top end of the opening and closing column 301 penetrates the inner wall of the air inlet 2 and extends to the outside. The surface of the opening and closing column 301 inside the air inlet 2 is provided with an opening and closing plate 302. The top of the opening and closing plate 302 is rotatably installed with an opening and closing connecting rod 305 through a convex shaft 304.

[0052] A driving mechanism 4 is fixedly installed on the top of the treatment box 1. The driving mechanism 4 comprises a cylinder 401 fixedly installed on the top of the treatment box 1. The output end of the cylinder 401 is fixedly installed with a push plate 402. The two sides of the push plate 402 are slidably connected with the inside of the sliding groove 10. The bottom of the push plate 402 is fixedly installed with a connecting plate 403. The convex shaft 304 and the push plate 402 are rotatably connected through the opening and closing connecting rod 305.

[0053] A filtering mechanism 5 is used for filtering dust-containing gas.

[0054] A cleaning mechanism 6 is used for cleaning the filtering mechanism 5.

[0055] An air induction mechanism 8 is used for sucking dust-containing gas into the inside of the treatment box 1.

[0056] Two first switches 16 are fixedly installed on the two sides of the inner wall of the treatment box 1.

[0057] The filtering mechanism 5 is fixedly installed on one side of the connecting plate 403. The filtering mechanism 5 comprises a driving plate 501 fixedly installed on one side of the connecting plate 403. The inside of the driving plate 501 is fixedly installed with four connecting rods 502. The two ends of the four connecting rods 502 are fixedly installed with a first filter plate 503 and a second filter plate 505, respectively. One side of the first filter plate 503 is fixedly installed with a first baffle 504. The first baffle 504 is installed in adaptation with the first air inlet 11 and the first pollution outlet 12. One side of the second filter plate 505 is fixedly installed with a second baffle 506. The second baffle 506 is installed in adaptation with the second air inlet 13 and the second pollution outlet 14.

[0058] Two said cleaning mechanism 6 symmetrical rotation is installed in the two sides of the treatment box 1 inner wall, the cleaning mechanism 6 includes rotating column 601, the rotating column 601 rotation is installed in the two sides of the treatment box 1 inner wall, the rotating column 601 one end penetrates the inner wall of the treatment box 1 and extends to the outside, the rotating column 601 located at the outside of the treatment box 1 one end fixedly connected with cleaning motor 602, the cleaning motor 602 is fixedly installed on the one side of the treatment box 1 through the support, the surface of the rotating column 601 is fixedly installed with fixed sleeve 603, the bottom of the fixed sleeve 603 is rotatably installed with cleaning shaft 604, the surface of the cleaning shaft 604 is respectively fixedly installed with three cleaning hammers 606 through three rotating sleeves 605.

[0059] One side of the first wind box 19 and the second wind box 20 is communicated with the air induction mechanism 8, the air induction mechanism 8 includes air inlet pipe 801, air induction motor 803, both ends of the air inlet pipe 801 are communicated with one side of the first wind box 19 and the second wind box 20 respectively, the middle part of the air inlet pipe 801 is communicated with air outlet pipe 802, the air induction motor 803 is arranged on the ground through the support, the output shaft of the air induction motor 803 penetrates the outer wall of the air inlet pipe 801 and extends to the inside of the air outlet pipe 802, the output shaft of the air induction motor 803 is fixedly installed with fan blade 804.

[0060] In actual use, two said first switch 16 is used for controlling left and right two said cleaning motor 602 work respectively;The first air inlet 11 is right side;The opening and closing plate 302 is installed with the air inlet 2;The drive plate 501, the first filter plate 503, the second filter plate 505 are sealed with the treatment box 1.

[0061] The working principle of the dust treatment device provided by the application is as follows:

[0062] First, when mixing lithium mica concentrate with calcium chloride, potassium chloride and calcium hydroxide, the air inlet 2 is connected with the mixer, the air induction motor 803 is started to drive the fan blade 804 to work, at this time, the dust-containing gas generated during mixing in the mixer is subjected to negative pressure, and is blocked from the first filter plate 503 by the drive plate 501, after the dust-containing gas is filtered by the first filter plate 503, the clean gas flows from the first air inlet 11 to the first wind box 19, and then is discharged from the air inlet pipe 801 to the air outlet pipe 802.

[0063] Then, with the dust accumulation, the resistance of the airflow through the first filter plate 503 increases, and the pressure at the air inlet 2 increases relatively, causing the pressure difference to increase. When the pressure difference reaches the preset threshold, the air pressure sensor 15 sends a signal to start the air cylinder 401 to push the push plate 402. The push plate 402 drives the drive plate 501 to move to switch the second filter plate 505 to filter the dust-containing gas. At the same time, the push plate 402 drives the disc 303 to rotate through the opening and closing connecting rod 305, and the disc 303 drives the opening and closing plate 302 to rotate through the opening and closing column 301. In the process of moving the drive plate 501 to the right, the opening and closing plate 302 gradually closes the air inlet 2 to reduce the air intake. When the drive plate 501 reaches the air inlet 2, the opening and closing plate 302 is completely closed. When the drive plate 501 continues to move beyond the air inlet 2, the opening and closing plate 302 is reversed again to gradually open the air inlet 2. At this time, the second filter plate 505 filters the dust-containing gas. The drive plate 501 moves to the right side of the air inlet 2, and the second baffle 506 closes the second blowdown port 14. The clean gas is discharged from the second air inlet 13.

[0064] Then, when the first baffle 504 moves to the end of the stroke, the air cylinder 401 stops working, and the first baffle 504 contacts the first switch 16 to close the first air inlet 11 and open the first blowdown port 12. At this time, the right cleaning motor 602 is started. The cleaning motor 602 drives the rotating column 601 to rotate counterclockwise. After the rotating column 601 drives the cleaning shaft 604 to rise upward through the fixed sleeve 603, the cleaning motor 602 is reversed to drive the three cleaning hammers 606 to uniformly knock the first filter plate 503. The solid dust falls into the first blowdown port 12 and is discharged. After cleaning, the cleaning motor 602 is closed.

[0065] Finally, the above process is repeated to complete the continuous dust control.

[0066] Compared with the related art, the dust control device provided by the application has the following beneficial effects:

[0067] By setting three air pressure sensors 15 to detect the pressure difference and automatically start the air cylinder 401 to switch the filter plate to filter the dust-containing gas, the opening and closing plate 302 is gradually closed to the air inlet 2 and is opened again after being completely closed in the process of switching the filter plate. This avoids the problem of unfiltered dust-containing gas escaping directly from the open blowdown port, causing cleaning failure. By setting the first baffle 504 and the second baffle 506 to control the two first switches 16 to automatically start the cleaning motor 602 to clean the blocked filter plate, the mixed continuity is ensured, and the dust control reaches the pollution environment control while avoiding dust dispersion to protect the environment.

[0068] Second embodiment

[0069] Please refer to Figures 11-17, based on the first embodiment of the application provides a dust control device, the second embodiment of the application proposes another dust control device. The second embodiment is only the preferred mode of the first embodiment, the implementation of the second embodiment does not affect the implementation of the first embodiment alone.

[0070] Specifically, the second embodiment of the application provides a dust control device, wherein the two sides of the inner wall of the treatment box 1 are symmetrically provided with four horizontal grooves 21, two anti-blowing mechanisms 7 are symmetrically and slidably installed in the four horizontal grooves 21, the anti-blowing mechanism 7 comprises an anti-blowing column 701, both ends of the anti-blowing column 701 are slidably installed in the two horizontal grooves 21, the anti-blowing column 701 is rotatably installed on the surface of the cleaning shaft 604 through two anti-blowing connecting rods 702, the anti-blowing column 701 is fixedly connected with the two anti-blowing connecting rods 702, two air pressure nozzles 703 are fixedly installed in the anti-blowing column 701, the input ends of the two air pressure nozzles 703 are communicated with two air supply pipes 704, and the two air supply pipes 704 penetrate the inner wall of the treatment box 1 and extend to the outside.

[0071] The air inlet pipe 801 is communicated with two recovery mechanisms 9, the recovery mechanism 9 comprises a negative pressure pipe 902, one end of the negative pressure pipe 902 is communicated with the outer wall of the air inlet pipe 801, the other end of the negative pressure pipe 902 is communicated with a recovery box 901, the recovery box 901 is arranged on the ground, a filter screen 903 is arranged in the negative pressure pipe 902, and one side of the recovery box 901 is communicated with a discharge pipe 904.

[0072] Two second switches 17 are fixedly installed on the two sides of the inner wall of the treatment box 1, and the two second switches 17 are respectively used for controlling the start and stop of the four air pressure nozzles 703.

[0073] The output end of the air outlet pipe 802 is communicated with a gas storage mechanism 18, the gas storage mechanism 18 comprises a gas storage tank 1801, the top of the gas storage tank 1801 is communicated with a pressure relief valve 1802, the two sides of the gas storage tank 1801 are respectively communicated with a first gas conveying pipe 1803 and a second gas conveying pipe 1804, the surface of the first gas conveying pipe 1803 is communicated with the ends of the two right air supply pipes 704, and the surface of the second gas conveying pipe 1804 is communicated with the ends of the two left air supply pipes 704.

[0074] In actual use, the two second switches 17 are respectively used for controlling the work of the left and right air pressure nozzles 703; the filter screen 902 is replaced regularly; and the discharge pipe 904 is provided with a shut-off valve.

[0075] The working principle of the dust control device provided by the embodiment is as follows:

[0076] Firstly, the clean gas discharged by the gas outlet pipe 802 enters the inside of the gas storage tank 1801, and is discharged by the pressure relief valve 1802 after reaching the maximum capacity,

[0077] When the first baffle 504 moves to trigger the first switch 16 and closes the first air inlet 11, the first baffle 504 also triggers the second switch 17, at this time, the right side cleaning mechanism 6 and the back flushing mechanism 7 work simultaneously, the two air pressure nozzles 703 on the right side are connected through the air supply pipe 704 and the first gas supply pipe 1803, the gas used by the air pressure nozzle 703 is the clean gas after filtering dust, at this time, when the cleaning shaft 604 is raised upward counterclockwise, the back flushing column 701 is rotated clockwise, after the cleaning shaft 604 falls back, the back flushing column 701 is also rotated counterclockwise, so as to realize the reciprocating swing of the two air pressure nozzles 703, and the first filter plate 503 is fully back flushed by the clean gas to avoid the dust falling into the cleaning area when the cleaning hammer 606 cleans, at the same time, the back flushing airflow assists the cleaning of the filter plate and makes the dust enter the first dust outlet 12 during the working process of the cleaning hammer 606.

[0078] Then, the first baffle 504 opens the first dust outlet 12, and the dust falls into the inside of the recovery box 901 on the right side after being knocked and fully back flushed, at this time, the channel is opened, the air inlet mechanism 8 also generates a small negative pressure in the inside of the recovery box 901, and the dust is sucked into the inside of the recovery box 901, so as to avoid the escaped dust and the dust adhered to the inner wall of the treatment box 1, and the dust is avoided to be sucked in through the filter screen 903.

[0079] Finally, after cleaning, the first baffle 504 is reset to close the first dust outlet 12, the discharge pipe 904 is manually opened to recover the dust and clean the filter screen 903.

[0080] Compared with the related art, the dust treatment device provided by the embodiment has the following beneficial effects:

[0081] By setting the second switch 17 to synchronously start the back blowing mechanism 7, the air pressure nozzle 703 reciprocates to blow back the filter plate comprehensively during the cleaning of the cleaning hammer 606, so that dust does not fall into the cleaning area during cleaning, the back blowing airflow can clean more thoroughly by penetrating into the inside of the filter material, and the cleaning hammer 606 is assisted to clean the filter plate, so that dust enters the first blowdown port 12 to avoid secondary pollution. The back blowing gas source is directly taken from the filtered clean gas and stored in the gas storage tank 1801, so that the closed loop utilization of energy is realized, an external compressed air source is not needed, the external energy consumption demand and equipment complexity of the system are reduced, the secondary pollution to the filter plate is avoided by back blowing with clean gas, the dust falling and swept is sucked into the recovery box by setting the recovery box 901 and the air induction mechanism 8 to generate micro negative pressure in the recovery box, dust is effectively prevented from flying or adhering to the inner wall in the treatment box 1, the inside of the equipment is kept clean, and the concentration of the collected dust is ensured. From filtration, switching, back blowing and dust removal to dust negative pressure recovery, the whole process is automatically completed in a closed system, the operator only recovers dust through the discharge pipe 904 in the final treatment stage, the contact opportunity with dust is minimized, the health and safety of the operator are greatly guaranteed, and the high standard requirement of modern industry for occupational health is met.

[0082] A mixed roasting treatment method of lepidolite

[0083] A mixed roasting treatment method of lepidolite, comprising the following steps:

[0084] S1: mechanically mixing lepidolite concentrate with calcium chloride, potassium chloride and calcium hydroxide to obtain a mixture; wherein, based on the mass of the lepidolite concentrate, the addition amount of calcium chloride is 10-30wt%, the addition amount of potassium chloride is 5-20wt%, and the addition amount of calcium hydroxide is 20-40wt%;

[0085] S2: placing the mixture obtained in S1 in a roasting device to perform roasting treatment under an air atmosphere, the roasting temperature is 700-900℃, the roasting time is 1-6h, and the heating rate is 10-20℃ / min;

[0086] S3: after the roasting is completed, cooling the product to room temperature to obtain a roasting clinker.

[0087] In S1, based on the mass of the lepidolite concentrate, the addition amount of calcium chloride is 15-25wt%, the addition amount of potassium chloride is 8-15wt%, and the addition amount of calcium hydroxide is 25-35wt%, the calcium chloride and the potassium chloride constitute a chlorinating agent component, the total addition amount of which is 20-50wt%, and the addition amount of the calcium hydroxide is 25-35wt%, and the roasting device in S2 is a muffle furnace.

[0088] First embodiment

[0089] A certain amount of lithium mica concentrate (based on the mass of lithium mica concentrate) is weighed, 15wt% of calcium chloride, 8wt% of potassium chloride and 25wt% of calcium hydroxide are added, and the mixture is thoroughly mixed to obtain a mixed material;

[0090] The mixed material is placed in a muffle furnace, and the temperature is raised to 900℃ at a rate of 10-20℃ / min under an air atmosphere, and the temperature is maintained for 2 hours.

[0091] After the roasting is completed, the furnace door is closed and the roasting clinker is naturally cooled or removed and cooled to room temperature in a dry environment.

[0092] The leaching rate of lithium in this example can reach more than 80.00% by water immersion and inductively coupled plasma optical emission spectrometry (ICP-OES) determination.

[0093] Compared with the related art, the lithium mica mixed roasting treatment method provided by the present application has the following beneficial effects:

[0094] High lithium leaching rate: The present application utilizes the synergistic mechanism of calcium chloride , potassium chloride and calcium hydroxide . Effective destruction of the lithium mica silicate lattice; Significant reduction in the melting point and viscosity of the roasting system, promoting ion diffusion and reaction; Providing an alkaline environment to facilitate the conversion of lithium into easily soluble lithium salts (such as or subsequent conversion into . The three synergistically increase the lithium leaching rate to more than 80%, which is much higher than that of single salt roasting. Significant reduction in roasting temperature: The optimized composite additive system reduces the effective roasting temperature range to 700-900℃, which is 50-200℃ lower than that of traditional single calcium chloride roasting (usually >900℃) or sulfate roasting (>950℃), significantly reducing energy consumption and production cost. Reduction in total amount of chlorinating agent: The introduction of calcium hydroxide partially replaces the function of the chlorinating agent (such as providing and maintaining alkalinity), while its synergistic effect with the chlorinating agent improves the chlorination efficiency. Compared with a process that relies solely on a chlorinating agent, the total amount of chlorinating agent + in the present application can be reduced by 10-20%, reducing raw material cost and the burden of subsequent chlorine-containing waste gas treatment. Easy handling of roasting products: In the obtained roasting clinker, lithium is mainly in the form of water-soluble or acid-soluble (such as , , or its precursor) exists, greatly facilitates the subsequent water leaching or acid leaching lithium extraction process, and improves the separation and purification efficiency of lithium. The method efficiently extracts lithium while having good activation effect on valuable elements such as potassium ( ), rubidium ( ), cesium ( ) and the like in lepidolite, so that they are more easily recovered in the subsequent leaching step, significantly improving the overall utilization value and economy of lepidolite resources.

[0095] The environmental friendliness is improved. By reducing the amount of chlorinating agent and optimizing the roasting conditions, the generation amount and emission pressure of harmful gases containing chlorine (especially ) in the roasting process are effectively reduced, and the corrosion of equipment and the risk of environmental pollution are reduced.

[0096] The above only describes the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A dust treatment device, comprising a treatment box, a first air inlet, a first dust outlet, a second air inlet and a second dust outlet are arranged on the bottom of the treatment box, the bottom of the first air inlet and the second air inlet is respectively fixedly installed with a first bellows and a second bellows, a side of the treatment box is communicated with an air inlet, characterized in that, Also include: The wind pressure sensor, three said wind pressure sensor is respectively arranged in the inner wall of the air inlet and the first wind box, the second wind box inner wall on one side; The chute, the chute is opened in the top of the treatment box; The opening and closing mechanism, the opening and closing mechanism is rotatably installed on the inner wall of the air inlet, the opening and closing mechanism includes opening and closing column, the opening and closing column is rotatably installed on the inner wall of the air inlet, the top of the opening and closing column penetrates the inner wall of the air inlet and extends to the outside, the surface of the opening and closing column located in the air inlet is provided with opening and closing plate, the top of the opening and closing column is fixedly installed with disc, the disc is rotatably installed with opening and closing connecting rod through the convex shaft on the top; The drive mechanism, the drive mechanism is fixedly installed on the top of the treatment box, the drive mechanism includes cylinder, the cylinder is fixedly installed on the top of the treatment box, the output end of the cylinder is fixedly installed with push plate, the both sides of the push plate are slidably connected with the inside of the chute, the bottom of the push plate is fixedly installed with connecting plate, the convex shaft and the push plate are rotatably connected through the opening and closing connecting rod; Filtering mechanism, the filtering mechanism is used for filtering dust-containing gas; Cleaning mechanism, the cleaning mechanism is used for cleaning the filtering mechanism; Air induction mechanism, the air induction mechanism is used for sucking dust-containing gas into the inside of the treatment box; The first switch, two said first switch is respectively fixedly installed on the both sides of the treatment box inner wall.

2. A dust management device according to claim 1, wherein, The filtering mechanism is fixedly installed on one side of the connecting plate, the filtering mechanism includes drive plate, the drive plate is fixedly installed on one side of the connecting plate, the inside of the drive plate is fixedly installed with four connecting rods, the both ends of four said connecting rods are respectively fixedly installed with first filter plate and second filter plate, one side of the first filter plate is fixedly installed with first baffle, the first baffle is installed with the first air inlet, the first pollution outlet, one side of the second filter plate is fixedly installed with second baffle, the second baffle is installed with the second air inlet, the second pollution outlet.

3. A dust management device according to claim 1, wherein, Two said cleaning mechanism is rotatably installed on the both sides of the treatment box inner wall, the cleaning mechanism includes rotating column, the rotating column is rotatably installed on the both sides of the treatment box inner wall, one end of the rotating column penetrates the inner wall of the treatment box and extends to the outside, one end of the rotating column located outside the treatment box is fixedly connected with cleaning motor, the cleaning motor is fixedly installed on one side of the treatment box through support, the surface of the rotating column is fixedly installed with fixed sleeve, the bottom of the fixed sleeve is rotatably installed with cleaning shaft, the surface of the cleaning shaft is respectively fixedly installed with three cleaning hammers through three rotating sleeves.

4. A dust management device according to claim 3, wherein, The first wind box and the second wind box on one side are communicated with air induction mechanism, the air induction mechanism includes air inlet pipe, air induction motor, the both ends of the air inlet pipe are respectively communicated with the first wind box and the second wind box on one side, the middle part of the air inlet pipe is communicated with air outlet pipe, the air induction motor is arranged on the ground through support, the output shaft of the air induction motor penetrates the outer wall of the air inlet pipe and extends to the inside of the air outlet pipe, the output shaft of the air induction motor is fixedly installed with fan blade.

5. A dust management device according to claim 4, wherein, Four horizontal grooves are symmetrically arranged on the two sides of the inner wall of the treatment box, two reverse blowing mechanisms are symmetrically and slidably installed in the four horizontal grooves, the reverse blowing mechanism comprises a reverse blowing column, the two ends of the reverse blowing column are slidably installed in the two horizontal grooves, the reverse blowing column is rotatably installed on the surface of the cleaning shaft through two reverse blowing connecting rods, the reverse blowing column is fixedly connected with the two reverse blowing connecting rods, two air pressure nozzles are fixedly installed in the reverse blowing column, the input ends of the two air pressure nozzles are both communicated with air supply pipes, and the air supply pipes penetrate through the inner wall of the treatment box and extend to the outside.

6. A dust management device according to claim 4, wherein, The air inlet pipe is communicated with two recovery mechanisms, the recovery mechanism comprises a negative pressure pipe, one end of the negative pressure pipe is communicated with the outer wall of the air inlet pipe, the other end of the negative pressure pipe is communicated with a recovery box, the recovery box is arranged on the ground, a filter screen is arranged in the negative pressure pipe, and a discharge pipe is communicated with one side of the recovery box.

7. A dust management device according to claim 5, wherein, Two second switches are fixedly installed on the two sides of the inner wall of the treatment box, and the two second switches are respectively used for controlling the start and stop of the four air pressure nozzles.

8. A dust management device according to claim 5, wherein, The output end of the air outlet pipe is communicated with a gas storage mechanism, the gas storage mechanism comprises a gas storage tank, a pressure relief valve is communicated with the top of the gas storage tank, first and second gas conveying pipes are respectively communicated with the two sides of the gas storage tank, the surface of the first gas conveying pipe is communicated with the ends of the two right air supply pipes, and the surface of the second gas conveying pipe is communicated with the ends of the two left air supply pipes.

9. A method of lithium mica mixed roasting treatment, characterized in that a dust control device according to any one of claims 1 to 8 is used. The method comprises the following steps: S1: mechanically mixing lithium mica concentrate, calcium chloride, potassium chloride and calcium hydroxide to obtain a mixture; wherein, based on the mass of lithium mica concentrate, the addition amount of calcium chloride is 10-30wt%, the addition amount of potassium chloride is 5-20wt%, and the addition amount of calcium hydroxide is 20-40wt%; S2: placing the mixture obtained in S1 in a roasting device, and performing roasting treatment under an air atmosphere, the roasting temperature is 700-900℃, the roasting time is 1-6h, and the heating rate is 10-20℃ / min; S3: after roasting, the product is cooled to room temperature to obtain a roasting clinker.

10. The method of claim 9, wherein the lithium mica is mixed and calcined. In S1, based on the mass of lithium mica concentrate, the addition amount of calcium chloride is 15-25wt%, the addition amount of potassium chloride is 8-15wt%, and the addition amount of calcium hydroxide is 25-35wt%, the calcium chloride and the potassium chloride constitute a chlorinating agent component, the total addition amount of which is 20-50wt%, and the addition amount of the calcium hydroxide is 25-35wt%, and the roasting device in S2 is a muffle furnace.

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