Air suction type homogenizing mixer and use method thereof

Abstract

The invention discloses an air suction type homogenizing mixer and a use method thereof, and belongs to the technical field of powder mixing. The air suction type homogeneous mixer comprises a rack, a material mixing box is fixedly arranged on the rack, the material mixing box comprises an air suction and distribution chamber on the upper portion and a particle separation chamber on the lower portion, and a particle separation device used for preventing particles from entering the air suction and distribution chamber is arranged between the air suction and distribution chamber and the particle separation chamber; the air suction and distribution chamber is connected with a suction fan, and a discharging device is arranged at the bottom of the particle separation chamber. A material suction pipe is arranged on the chamber wall of the particle separation chamber, and the end part of the material suction pipe is open; two raw material feeding ports are formed in the material suction pipe, and a raw material feeding device is arranged at each raw material feeding port; and at least two mixing guide vanes are arranged between the raw material feeding port and the particle separation chamber in the material suction pipe. According to the invention, zinc oxide adhesion and caking are reduced, the influence of non-uniform zinc oxide impurity content is reduced, continuous and efficient mixing is realized, the influence on benefits is small, and the final product quality is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of powder mixing, and in particular to an air suction type homogenizing mixer and a use method thereof. Background Art

[0002] Indirect zinc oxidation is to evaporate zinc liquid into zinc vapor at high temperature continuously, and then collect the zinc vapor into zinc oxide particles through cloth bags. The diameter of zinc oxide particles is 0.1 to 10 microns, which is a very fine material. After collection, they are uniformly filled into turnover bags for turnover transportation or secondary processing. The capacity of turnover bags is generally 300 to 500 kg. Since zinc oxide itself has a certain viscosity, it is easy to form blocks after external force extrusion, so it is necessary to reduce or even avoid extrusion after output to ensure product quality.

[0003] At present, in order to control the cost of raw materials, zinc slag is mostly used to replace zinc ingots for zinc oxide production. Zinc slag contains a large amount of impurities such as iron, lead, and hydrochloric acid insolubles, and the impurity content of zinc slag raw materials varies. These impurities will inevitably enter the zinc oxide products in trace amounts during the production process. Affected by this, the impurity content of zinc oxide produced at different stages will be different. For example, zinc oxide with lead content of 1000ppm and 300ppm may be produced in two stages. In addition, affected by factors such as production process parameter control, even if zinc oxide produced from the same batch of zinc slag raw materials is filled into turnover bags, the impurity content of zinc oxide in different areas of the turnover bags will also have some differences, but the difference in impurity content in different areas of the same turnover bag is relatively small.

[0004] In the downstream application industries of zinc oxide, except for a few industries with extremely high requirements for impurity content, most industries only have general requirements for impurity content, such as a lead content of less than 500ppm. For this demand, zinc oxide with a lead content of 1000ppm obviously does not meet it, and providing zinc oxide with a lead content of 300ppm will cause quality overflow problems. Therefore, in actual production, the method of mixing the above-mentioned high-quality zinc oxide that exceeds the target requirement with the above-mentioned low-quality zinc oxide that is lower than the target requirement in proportion to obtain zinc oxide that basically meets the target requirements will be adopted to increase product revenue. To a certain extent, this type of zinc oxide product is an internal special product with obvious timeliness characteristics in terms of product delivery period, and the number of special products has shown a significant growth trend in recent years.

[0005] The inventor has been committed to the research and development of the above zinc oxide mixing technology and has adopted Figure 4The screw belt machine scheme shown in the figure is used for the above-mentioned mixed production; specifically, low-quality zinc oxide and high-quality zinc oxide are input into the cabin in an approximate proportion, and after being stirred evenly by the screw belt, samples are taken to detect whether the target requirements are met. If not, the high-quality zinc oxide input ratio is increased, and the stirring is continued and then tested. After the target requirements are met, the output is packaged. The advantage of this screw belt machine mixing technology is that it eliminates the influence of uneven impurities in the zinc oxide in the turnover bag, and can extract samples that can represent the quality of the final mixed zinc oxide under the condition of full mixing, and obtain accurate test data. The disadvantage is that it is an intermittent production, that is, it takes a certain amount of time to mix the two zinc oxide raw materials, and it also takes a certain amount of time to wait for the test after mixing. When the test results do not meet the target requirements, repeated mixing is required, and the overall efficiency is extremely low, and the timeliness requirements of zinc oxide mixed production are often not met; in addition, the spiral blades in the screw belt machine squeeze the zinc oxide, and the zinc oxide wall agglomeration phenomenon is obvious. This agglomeration will fall off during the mixing process and mix into the final mixed zinc oxide to form hard particles. The hard particles will be output to the packaging bag with the zinc oxide, affecting the product quality.

[0006] Therefore, it is necessary to comprehensively consider the adhesion characteristics of zinc oxide and the uneven content of zinc oxide impurities in turnover bags to provide an efficient and high-quality mixing method to solve the above problems. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a wind suction homogenizing mixer and a method for using the same, which can reduce the adhesion and agglomeration of zinc oxide, reduce the influence of uneven impurity content of zinc oxide, achieve continuous and efficient mixing, have little impact on revenue, and help ensure the quality of the final product.

[0008] In order to solve the above technical problems, the technical solution of the present invention is: an air suction homogenizing mixer, comprising a frame, a mixing box is fixedly arranged on the frame, the mixing box comprises an upper air suction and air distribution chamber and a lower particle separation chamber, a particle separation device for preventing particles from entering the air suction and air distribution chamber is arranged between the air suction and air distribution chamber and the particle separation chamber; the air suction and air distribution chamber is connected to a suction fan, and a discharging device is arranged at the bottom of the particle separation chamber; A suction pipe is provided on the wall of the particle separation chamber, and the end of the suction pipe is open; two raw material feeding ports are provided on the suction pipe, and a raw material feeding device is provided at each of the raw material feeding ports; at least two mixing guide blades are provided in the suction pipe between the raw material feeding ports and the particle separation chamber; The mixing guide blade comprises a windward end and a leeward end, the windward end and the leeward end are cross-arranged at 90°, and the mixing guide blade is arranged in a spiral shape twisted 90° from the windward end to the leeward end; the spiral directions of the mixing guide blades are the same.

[0009] As a preferred technical solution, the windward end of the downstream mixing guide blade and the leeward end of the upstream adjacent mixing guide blade are cross-arranged at 90°.

[0010] As a preferred technical solution, a buffer space is provided between two adjacent mixing guide blades.

[0011] As a preferred technical solution, the suction pipe includes a mixing section fixedly connected to the wall of the particle separation chamber, and the end of the mixing section is integrally provided with a suction section bent obliquely downward; the suction section is provided with two raw material feeding ports, and the mixing guide blade is provided in the mixing section.

[0012] As a preferred technical solution, a material receiving box is provided on the frame at the lower end of the suction section, and an isolation cage covering the lower port of the suction section is fixedly provided at the top opening of the material receiving box.

[0013] As a preferred technical solution, the raw material feeding device includes a raw material hopper arranged on the frame and higher than the corresponding raw material feeding port, a star-shaped feeder is provided at the lower part of the raw material hopper, and a feeding guide pipe is provided between the discharge port of the star-shaped feeder and the corresponding raw material feeding port.

[0014] As a preferred technical solution, the particle separation device includes a partition fixedly arranged in the mixing box, and the partition is provided with a plurality of separation mounting holes extending vertically therethrough, and each of the separation mounting holes is respectively installed with a filter bag assembly hanging downward into the particle separation chamber.

[0015] As a preferred technical solution, the discharging device includes a discharging trough arranged at the bottom of the particle separation chamber, a discharging auger is installed in the discharging trough, a discharging port is provided at the lower part of one end of the discharging trough, and a star-shaped discharging device is installed at the discharging port.

[0016] The method of using the air suction homogenizing mixer includes the following steps: Step 1: Select two portions of raw materials to be supplied to the two raw material delivery devices, the two portions of raw materials being respectively a high-quality raw material having a value higher than the target index and a low-quality raw material having a value lower than the target index; Step 2: Samples are taken from at least three different positions in the high-quality raw material and the low-quality raw material, and index data are detected; the index data detected from each sample in the low-quality raw material are respectively recorded as a1, a2...an, and the data with the lowest index is taken as the index data a of the low-quality raw material; the index data detected from each sample in the high-quality raw material are respectively recorded as b1, b2...bn, and the data with the lowest index is taken as the index data b of the high-quality raw material; the target index of the material to be mixed is c; Step 3: Based on the delivery speed of the low-quality raw materials at the corresponding raw material delivery device, the delivery speed of the high-quality raw materials at the corresponding raw material delivery device is fed at a speed of k (ca) / (bc); wherein k is the guarantee coefficient, and its value is 1.05 to 1.1.

[0017] Due to the adoption of the above technical solution, the present invention achieves the following beneficial effects: (1) High-quality raw materials and low-quality raw materials are simultaneously put into the suction pipe, and the two raw materials are mixed in a dusty state in the suction pipe under negative pressure, and are more evenly mixed after being forced to rotate by the mixing guide blades; the mixed materials are retained in the particle separation chamber under the action of their own weight and the blocking of the particle separation device, and gradually deposited at the bottom of the particle separation chamber, and are discharged by the discharging device; the whole process realizes continuous operation, and the efficiency is improved by 3 to 4 times compared with the screw conveyor; (2) The raw materials are mixed in the form of dust, without external force extrusion, and are not easy to stick to the wall, so the adhesion and agglomeration of zinc oxide are significantly reduced, and there are no hard particles in the final product, which is conducive to ensuring the quality of the final product; (3) The input ratio is determined based on the minimum indicators of high-quality raw materials and low-quality raw materials, so that the final product can meet the target product indicator requirements, reducing the impact of uneven zinc oxide impurity content, and further helping to ensure the quality of the final product; and compared with the mixing of the screw conveyor, the final product indicators are not much different, and the consumption of high-quality raw materials is not much different, which has little impact on the revenue. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention. Figure 1 is a front view structural schematic diagram of an embodiment of the present invention; Figure 2 yes Figure 1 Schematic diagram of AA structure in; Figure 3 is a three-dimensional enlarged structural schematic diagram of a mixing guide vane according to an embodiment of the present invention; Figure 4 It is a structural schematic diagram of an existing screw belt machine.

[0019] In the figure: 1-frame; 2-mixing box; 21-suction air distribution chamber; 22-particle separation chamber; 3-suction fan; 4-particle separation device; 41-partition; 42-filter bag assembly; 5-backblowing device; 51-backblowing air distribution pipe; 52-backblowing nozzle; 53-pulse valve; 54-air bag; 6-discharging device; 61-discharging trough; 62-discharging auger; 63-discharging port; 64-star-shaped discharging device; 7-suction pipe; 71-suction section; 72-raw material feeding port; 73-mixing section; 74-mixing guide vane; 75-windward end; 76-leeward end; 77-buffer interval; 8-raw material feeding device; 81-raw material hopper; 82-star-shaped feeder; 83-feeding guide pipe; 9-receiving box; 91-isolation cage. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention are described only by way of illustration. Needless to say, those of ordinary skill in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0021] like Figure 2 As shown, the air suction type homogenizing mixer includes a frame 1. The structure of the frame 1 is easily obtained by those skilled in the art according to conventional technical means, so it is not illustrated in detail in the drawings. A mixing box 2 is fixedly arranged on the frame 1. The mixing box 2 includes an upper suction air distribution chamber 21 and a lower particle separation chamber 22. A particle separation device 4 for preventing particles from entering the suction air distribution chamber 21 is arranged between the suction air distribution chamber 21 and the particle separation chamber 22; the suction air distribution chamber 21 is connected to a suction fan 3. The suction force of the suction fan 3 causes an airflow from the particle separation chamber 22 to the suction air distribution chamber 21 to be generated in the mixing box 2, and the particles in the airflow are blocked by the particle separation device 4 and retained in the particle separation chamber 22.

[0022] The particle separation device 4 of this embodiment includes a partition 41 fixedly arranged in the mixing box 2, and the partition 41 divides the mixing box 2 into the suction and air distribution chamber 21 and the particle separation chamber 22; the partition 41 is provided with a plurality of separation installation holes extending vertically, and each of the separation installation holes is respectively provided with a filter bag assembly 42 hanging down into the particle separation chamber 22. The filter bag assembly 42 is used to allow airflow to pass through, while particles are blocked. The filter bag assembly 42 includes an inner support cage and an outer filter bag. The support cage supports the filter bag without hindering the passage of airflow, so as to prevent the filter bag from losing its filtering function due to suction.

[0023] Preferably, a back-blowing device 5 is provided in the air suction and distribution chamber 21 to periodically blow back into the filter bag assembly 42 to shake off particles adsorbed on the outer surface of the filter bag assembly 42, thereby ensuring the long-term filtering performance of the filter bag assembly 42. Figure 1 and Figure 2 As shown, the back-blowing device 5 includes a back-blowing air distribution pipe 51 transversely arranged in the air suction distribution chamber 21, and a back-blowing nozzle 52 arranged toward the filter bag assembly 42 is arranged on the back-blowing air distribution pipe 51; the back-blowing air distribution pipe 51 extends out of the wall of the air suction distribution chamber 21 and is connected to a pulse valve 53, and the pulse valve 53 is connected to an air bag 54. The pulse valve 53 is opened regularly so that the high-pressure gas in the air bag 54 can enter the filter bag assembly 42 through the back-blowing air distribution pipe 51 and the back-blowing nozzle 52. In actual arrangement, several filter bag assemblies 42 can be grouped together, and one group shares a set of back-blowing devices 5, and each back-blowing device 5 is started at different times to reduce the impact of back-blowing on the overall suction wind force in the mixing box 2.

[0024] like Figure 1 and Figure 2 As shown, a discharging device 6 is provided at the bottom of the particle separation chamber 22 to discharge the materials retained and finally deposited at the bottom of the particle separation chamber 22. The discharging device 6 in this embodiment includes a discharging trough 61 provided at the bottom of the particle separation chamber 22, and a discharging auger 62 is installed in the discharging trough 61. Of course, the discharging auger 62 is connected to a discharging power; a discharging port 63 is provided at the lower part of one end of the discharging trough 61, and a star-shaped discharging device 64 is installed at the discharging port 63. The discharging auger 62 pushes the deposited materials to the discharging port 63, and the materials are finally discharged by the star-shaped discharging device 64. The self-sealing feature of the star-shaped discharging device 64 can form a blocking effect at the discharging port 63 to prevent it from affecting the negative pressure environment in the mixing box 2.

[0025] like Figure 1 and Figure 2 As shown, a suction pipe 7 is provided on the wall of the particle separation chamber 22, and the end of the suction pipe 7 is open, so that the suction force of the suction fan 3 can form a strong airflow between the suction pipe 7 and the suction air distribution chamber 21. The suction pipe 7 is provided with two raw material feeding ports 72, and each of the raw material feeding ports 72 is provided with a raw material delivery device 8. Of course, the two raw material delivery devices 8 are used to deliver high-quality raw materials with indicators higher than the target requirements and low-quality raw materials with indicators lower than the target requirements. The high-quality raw materials and low-quality raw materials delivered into the suction pipe 7 can form a dust-like mixture under the action of the strong airflow and enter the particle separation chamber 22.

[0026] like Figure 1As shown, the raw material feeding device 8 of this embodiment includes a raw material hopper 81 arranged on the frame 1 and higher than the corresponding raw material feeding port 72, a star-shaped feeder 82 is arranged at the lower part of the raw material hopper 81, and a feeding guide pipe 83 is arranged between the discharge port 63 of the star-shaped feeder 82 and the corresponding raw material feeding port 72. The star-shaped feeder 82 is used to control the feeding speed, and the output raw materials are introduced into the suction pipe 7 through the feeding guide pipe 83.

[0027] Preferably, if Figure 2 As shown, the suction pipe 7 includes a mixing section 73 fixedly connected to the wall of the particle separation chamber 22, and the end of the mixing section 73 is integrally provided with a suction section 71 bent obliquely downward; the suction section 71 is provided with two raw material feeding ports 72. The use of the obliquely downward suction section 71 can promote the two raw materials fed into the suction section 71 to form a better free-falling state, and this free-falling state is easy to form a dust storm that quickly diffuses the space in the pipe under the suction force, and the initial mixing effect in the pipe is better.

[0028] Preferably, if Figure 1 and Figure 2 As shown, a material receiving box 9 is provided at the lower end of the suction section 71 on the frame 1 to collect a small amount of material that may fall out from the lower end of the suction section 71 to avoid material waste. An isolation cage 91 covering the lower end of the suction section 71 is fixedly provided at the top opening of the material receiving box 9. The isolation cage 91 can prevent external impurities from being sucked into the suction pipe 7 while ensuring that the pipe opening of the suction pipe 7 is open, which is conducive to ensuring the cleanliness of the product.

[0029] like Figure 2 and Figure 3 As shown, at least two mixing guide vanes 74 are provided in the suction pipe 7 between the raw material feeding port 72 and the particle separation chamber 22. The mixing guide vanes 74 promote swirl flow in the suction pipe 7. The swirl flow can further evenly mix the dusty materials in the pipe, and finally the two raw materials enter the particle separation chamber 22 in an evenly mixed state. In this embodiment, the suction pipe 7 includes a mixing section 73 and a suction section 71, and the mixing guide vanes 74 are provided in the mixing section 73.

[0030] More specifically, the mixing guide blade 74 includes a windward end 75 and a leeward end 76, the windward end 75 and the leeward end 76 are arranged crosswise at 90 degrees, and the mixing guide blade 74 is arranged in a spiral shape twisted 90 degrees from the windward end 75 to the leeward end 76; through this shorter spiral guide, a swirl is formed in the tube, and through the guide of multiple stages of the mixing guide blades 74, the uniform mixing effect is further improved. The spiral directions of the mixing guide blades 74 are arranged in the same direction to reduce the wind resistance generated by the mixing guide blades 74, so as to maintain strong wind flow and uniform mixing in the tube at the same time.

[0031] Preferably, the windward end 75 of the downstream mixing guide blade 74 and the leeward end 76 of the upstream adjacent mixing guide blade 74 are arranged at 90° to cross each other. The swirl mixing principle of the mixing guide blade 74 is as follows: the airflow is divided into two streams when passing through the windward end 75 of the mixing guide blade 74, and the two streams are prompted to form spiral flows in the same direction through the blade curved surface. When the two swirls leave the mixing guide blade 74, they will produce the effect of mutual impact due to the spiral flow, that is, a mixing effect is produced. In this embodiment, the windward end 75 of the downstream mixing guide blade 74 is arranged to cross each other at 90°, so that the windward end 75 of the downstream mixing guide blade 74 is prompted to divide the airflow into two airflows containing different materials from before, and then perform swirl guided mixing, which can further improve the mixing effect.

[0032] Preferably, a buffer gap 77 is provided between two adjacent mixing guide blades 74. The buffer gap 77 forms a buffer space after the swirl mixing of the mixing guide blade 74. The airflow guided by the swirl can form an obvious mixing in the buffer space, and then be introduced into the next mixing guide blade 74 for further swirl mixing, thereby further improving the mixing effect.

[0033] In this embodiment, the two raw material delivery devices 8 are used to deliver high-quality raw materials and low-quality raw materials into the suction pipe 7 in proportion. The two raw materials form a dust-like mixture in the suction pipe 7 under negative pressure suction, and after the forced swirl action of the mixing guide blade 74, a more uniform mixture is formed; the mixed materials are retained in the particle separation chamber 22 under the action of their own weight and the blocking of the particle separation device 4, and gradually deposited to the bottom of the particle separation chamber 22, and finally output by the discharging device 6. The entire mixing process realizes continuous operation, and the efficiency is improved by 3 to 4 times compared with the screw belt machine. The raw materials are mixed in the form of dust, without external force extrusion, and are not easy to hang on the wall, so the adhesion and agglomeration of zinc oxide are significantly reduced, and there are no hard particles in the final product, which is conducive to ensuring the quality of the final product.

[0034] This embodiment also provides a method for using the air suction homogenizing mixer, comprising the following steps.

[0035] Step 1: Select two portions of raw materials to be supplied to the two raw material delivery devices 8, the two portions of raw materials being high-quality raw materials that are higher than the target index and low-quality raw materials that are lower than the target index. In actual production, for zinc oxide to be transferred in turnover bags, it is preferred to use one turnover bag of zinc oxide as one portion of raw material.

[0036] Step 2: Samples are taken from at least three different positions in the high-quality raw material and the low-quality raw material, and the index data are detected. The index data detected from each sample in the low-quality raw material are recorded as a1, a2...an, and the data with the lowest index is taken as the index data a of the low-quality raw material; the index data detected from each sample in the high-quality raw material are recorded as b1, b2...bn, and the data with the lowest index is taken as the index data b of the high-quality raw material; the target index of the material to be mixed is c.

[0037] Step 3: Based on the delivery speed of the low-quality raw materials at the corresponding raw material delivery device 8, the delivery speed of the high-quality raw materials at the corresponding raw material delivery device 8 is fed at a speed of k (ca) / (bc); wherein k is a guarantee coefficient, and its value is 1.05 to 1.1.

[0038] By using the above method, no matter what kind of high-quality raw materials or low-quality raw materials are used, any part of the obtained mixed zinc oxide can not be lower than the target index. The following examples are listed for further explanation.

[0039] For example, the target index c of the lead content of zinc oxide is 500ppm, and the two selected zinc oxides are low-quality raw materials with a lead content of approximately 1000ppm and high-quality raw materials with a lead content of approximately 300ppm. Sampling is performed at three height positions, high, medium, and low, in the low-quality raw materials and high-quality raw materials. After sample testing, the index data of the three samples of low-quality raw materials are 1020ppm, 980ppm, and 970ppm, respectively, and the index data of the three samples of high-quality raw materials are 310ppm, 300ppm, and 280ppm, respectively. Therefore, the index data a of the low-quality raw materials is determined to be 1020ppm, and the index data b of the high-quality raw materials is determined to be 310ppm, and the guarantee coefficient k is 1.05. Then the multiple of the delivery speed of high-quality raw materials compared to low-quality raw materials is 1.05*(500-1020) / (310-500)≈2.87, that is, the delivery ratio of high-quality raw materials to low-quality raw materials is 2.87:1.

[0040] When the low-quality raw materials and high-quality raw materials put in at a certain moment are just the lowest indicators, that is, 1020ppm and 310ppm respectively, the index of the mixed zinc oxide is approximately (1020+310*2.87) / (1+2.87)≈493ppm. When the index data of the low-quality raw materials and high-quality raw materials put in at a certain moment are 980ppm and 300ppm respectively, the index of the mixed zinc oxide is approximately (980+300*2.87) / (1+2.87)≈475ppm. When the index data of the low-quality raw materials and high-quality raw materials put in at a certain moment are 970ppm and 280ppm respectively, the index of the mixed zinc oxide is approximately (970+280*2.87) / (1+2.87)≈458ppm. The indicators are all above the target indicators, reducing the impact of uneven impurity content of zinc oxide, and further helping to ensure the quality of the final product.

[0041] When the same two raw materials are mixed using a ribbon machine, the actual sample test data that can represent the index of the final mixed material is mostly around 470ppm. The index of the mixed zinc oxide obtained in this embodiment fluctuates around this index. Therefore, the amount of high-quality raw materials consumed to produce the same amount of mixed zinc oxide is not much different, and thus the impact on the profit is not significant. That is, this embodiment can generate profits similar to those of the ribbon machine while significantly improving the mixing efficiency.

[0042] The above sample testing of each portion of raw material can be carried out in advance before the mixing operation. After the index data is determined, the turnover bag of the corresponding raw material is marked. When it is put into use, the feeding ratio can be easily calculated according to the index data, and then the feeding speed of the corresponding raw material feeding device 8 can be adjusted. Based on this, the driving motor of the star-shaped feeder 82 in the raw material feeding device 8 is preferably a variable frequency motor to facilitate the control of the feeding speed.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An air suction homogenizing mixer, comprising a frame, on which a mixing box is fixedly provided, characterized in that: The mixing box comprises an upper air suction and air distribution chamber and a lower particle separation chamber, a particle separation device for preventing particles from entering the air suction and air distribution chamber is provided between the air suction and air distribution chamber and the particle separation chamber; the air suction and air distribution chamber is connected to a suction fan, and a discharging device is provided at the bottom of the particle separation chamber; A suction pipe is provided on the wall of the particle separation chamber, and the end of the suction pipe is open; two raw material feeding ports are provided on the suction pipe, and a raw material feeding device is provided at each of the raw material feeding ports; at least two mixing guide blades are provided in the suction pipe between the raw material feeding ports and the particle separation chamber; The mixing guide blade comprises a windward end and a leeward end, the windward end and the leeward end are cross-arranged at 90°, and the mixing guide blade is arranged in a spiral shape twisted 90° from the windward end to the leeward end; the spiral directions of the mixing guide blades are the same.

2. The air suction type homogenizing mixer according to claim 1, characterized in that: The windward end of the downstream mixing guide blade and the leeward end of the upstream adjacent mixing guide blade are cross-arranged at 90 degrees.

3. The air suction homogenizing mixer according to claim 1, characterized in that: A buffer interval is provided between two adjacent mixing guide blades.

4. The air suction type homogenizing mixer according to claim 1, characterized in that: The suction pipe comprises a mixing section fixedly connected to the wall of the particle separation chamber, and the end of the mixing section is integrally provided with a suction section bent obliquely downward; the suction section is provided with two raw material feeding ports, and the mixing guide blade is provided in the mixing section.

5. The air suction homogenizing mixer according to claim 4, characterized in that: A material receiving box is arranged on the frame at the lower end of the suction section, and an isolation cage covering the lower port of the suction section is fixedly arranged at the top opening of the material receiving box.

6. The air suction type homogenizing mixer according to claim 1, characterized in that: The raw material feeding device includes a raw material hopper arranged on the frame and higher than the corresponding raw material feeding port, a star-shaped feeder is arranged at the lower part of the raw material hopper, and a feeding guide pipe is arranged between the discharge port of the star-shaped feeder and the corresponding raw material feeding port.

7. The air suction homogenizing mixer according to claim 1, characterized in that: The particle separation device comprises a partition fixedly arranged in the mixing box, wherein the partition is provided with a plurality of separation installation holes penetrating vertically, and each of the separation installation holes is respectively provided with a filter bag assembly hanging downward into the particle separation chamber.

8. The air suction homogenizing mixer according to claim 1, characterized in that: The discharging device comprises a discharging trough arranged at the bottom of the particle separation chamber, a discharging auger is installed in the discharging trough, a discharging port is arranged at the lower part of one end of the discharging trough, and a star-shaped discharging device is installed at the discharging port.

9. The method for using the air suction homogenizing mixer according to any one of claims 1 to 8, characterized in that: The steps include: Step 1: Select two portions of raw materials to be supplied to the two raw material delivery devices, the two portions of raw materials being respectively a high-quality raw material having a value higher than the target index and a low-quality raw material having a value lower than the target index; Step 2: Samples are taken from at least three different positions in the high-quality raw material and the low-quality raw material, and index data are detected; the index data detected from each sample in the low-quality raw material are respectively recorded as a1, a2...an, and the data with the lowest index is taken as the index data a of the low-quality raw material; the index data detected from each sample in the high-quality raw material are respectively recorded as b1, b2...bn, and the data with the lowest index is taken as the index data b of the high-quality raw material; the target index of the material to be mixed is c; Step 3: Based on the delivery speed of the low-quality raw materials at the corresponding raw material delivery device, the delivery speed of the high-quality raw materials at the corresponding raw material delivery device is fed at a speed of k (ca) / (bc); wherein k is the guarantee coefficient, and its value is 1.05 to 1.1.

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