Grinding system

Abstract

The application relates to the technical field of cement manufacturing, and discloses a grinding system which comprises a roller pressing system, a vertical mill system and a ball mill system, the discharge port of the roller pressing system and the discharge port of the vertical mill system are both connected to the feed port of the ball mill system; the roller pressing system is used for grinding first material, and the vertical mill system is used for grinding second material; the ball mill system is used for receiving the ground first material and the ground second material, and mixing the ground first material and the ground second material to obtain required third material; wherein the roller pressing system is further used for distributing a part of the ground first material to the ball mill system and returning another part of the ground first material to the roller pressing system for regrinding; and / or the vertical mill system is further used for distributing a part of the ground second material to the ball mill system and returning another part of the ground second material to the vertical mill system for regrinding, so that the appearance grading of the third material can be improved, and the energy consumption of the grinding system can be reduced.

Description

Technical Field

[0001] This invention relates to the field of cement manufacturing technology, and more specifically to a grinding system. Background Technology

[0002] Currently, grinding systems used to manufacture cement typically employ a combination of roller milling and ball milling systems. However, the resulting cement is difficult to achieve a good morphological gradation and has high energy consumption. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a grinding system that can improve the morphology and gradation of materials and reduce the energy consumption of the grinding system.

[0004] According to a first aspect of the present invention, a grinding system includes a roller pressing system, a vertical mill system, and a ball mill system. The discharge ports of the roller pressing system and the vertical mill system are both connected to the inlet of the ball mill system. The roller pressing system is used to grind a first material, and the vertical mill system is used to grind a second material. The ball mill system is used to receive the ground first material and the ground second material, and to mix and grind the first material and the second material to obtain a desired third material. The roller pressing system is also used to distribute the ground first material, distributing a portion of the ground first material to the ball mill system and returning another portion of the ground first material to the roller pressing system for further grinding. And / or, the vertical mill system is also used to distribute the ground second material, distributing a portion of the ground second material to the ball mill system and returning another portion of the ground second material to the vertical mill system for further grinding.

[0005] The grinding system according to embodiments of the present invention has at least the following beneficial effects: the first material after being ground by a roller press and the second material after being ground by a vertical mill system can enter a ball mill system for mixed grinding to obtain a third material. The third material is formulated with a variety of materials of different shapes, which helps to obtain a better morphological gradation of the third material. Furthermore, the roller press system can also distribute a portion of the ground first material to the ball mill system and return another portion of the ground first material to the roller press system for re-grinding, which helps to control the feed rate of the first material into the ball mill system, thereby controlling the proportion of the third material and further improving the morphological gradation of the third material; the first material can also be ground multiple times in the roller press system, which helps to make fuller use of the roller press system, reduce the energy consumption of the ball mill system, and reduce the energy consumption of the grinding system. And / or, the vertical mill system can also distribute a portion of the ground second material to the ball mill system, and return another portion of the ground second material to the vertical mill system for re-grinding. This helps control the feed rate of the second material into the ball mill system, thereby controlling the proportion of the third material and further improving the morphological gradation of the third material. The second material can also be ground multiple times in the vertical mill system, which helps to make fuller use of the vertical mill system, reduce the energy consumption of the ball mill system, and reduce the energy consumption of the grinding system.

[0006] According to some embodiments of the present invention, a roller pressing system includes a roller press for grinding a first material; a vertical mill system includes a vertical mill for grinding a second material; wherein the roller pressing system includes a first material distribution device, the discharge port of the roller press is connected to the inlet of the first material distribution device, and the discharge port of the first material distribution device is connected to the inlet of the ball mill system and the inlet of the roller press respectively; the first material distribution device is used to distribute a portion of the ground first material to the inlet of the ball mill system and return another portion of the ground first material to the inlet of the roller press; and / or, the vertical mill system includes a second material distribution device, the discharge port of the vertical mill is connected to the inlet of the second material distribution device, and the discharge port of the second material distribution device is connected to the inlet of the vertical mill system and the inlet of the ball mill respectively; the second material distribution device is used to distribute a portion of the ground second material to the inlet of the ball mill system and return another portion of the ground second material to the inlet of the vertical mill.

[0007] According to some embodiments of the present invention, the roller pressing system further includes a classifier for classifying the first material ground by the roller press to select first coarse powder; the discharge port of the roller press is connected to the feed port of the classifier; the classifier includes a first coarse material outlet and a second coarse material outlet, the second coarse material outlet is connected to the feed port of the roller press, the first coarse material outlet is connected to the feed port of a first material distribution device, and the discharge port of the first material distribution device is connected to the feed port of the ball mill system and the feed port of the classifier respectively; a portion of the first coarse powder enters the roller press through the second coarse material outlet; another portion of the first coarse powder enters the first material distribution device for distribution, the first material distribution device is used to convey a portion of the first coarse powder to the feed port of the ball mill system, and to convey a portion of the first coarse powder back to the classifier for classification.

[0008] According to some embodiments of the present invention, the roller pressing system further includes a first cyclone collecting system and a third material distribution device, and the powder classifier further includes a first fine material outlet; the first fine material outlet is connected to the feed inlet of the first cyclone collecting system; the powder classifier is also used to select the first fine powder of the first material after being ground by the roller press, and the first cyclone collecting system is used to collect and remove dust from the first fine powder; the discharge port of the first cyclone collecting system is connected to the feed inlet of the third material distribution device, and the third material distribution device includes a first material outlet to be ground and a first finished material outlet, the first material outlet to be ground is connected to the feed inlet of the ball mill system; the first material outlet to be ground is used to transport a portion of the first fine powder collected by the first cyclone collecting system to the feed inlet of the ball mill system, and the first finished material outlet is used to output another portion of the first fine powder as finished material.

[0009] According to some embodiments of the present invention, the first cyclone collection system includes a first collection cylinder, a first fine material outlet connected to the inlet of the first collection cylinder, the first collection cylinder being used to collect first fine powder; the outlet of the first collection cylinder being connected to the inlet of the third material distribution device; the first collection cylinder being equipped with a first circulating fan, and the first collection cylinder also including a first dust discharge port connected to the external space.

[0010] According to some embodiments of the present invention, the first cyclone collection system further includes a first dust collector, which includes a first air inlet, a second dust outlet, and a second finished product outlet; the first air inlet is connected to the first dust outlet, the second dust outlet is connected to the external space, and the second finished product outlet is used to output a portion of the first fine powder collected by the first dust collector as finished product.

[0011] According to some embodiments of the present invention, the air classifier includes a static air classifier and a dynamic air classifier. The dynamic air classifier includes a first coarse material outlet and a first fine material outlet, and the static air classifier includes a second coarse material outlet and a second fine material outlet. The discharge port of the roller press is connected to the feed port of the static air classifier, and the second fine material outlet is connected to the feed port of the dynamic air classifier.

[0012] According to some embodiments of the present invention, the vertical mill system further includes a second cyclone collection system and a fourth material distribution device; the vertical mill is used to grind the second material and select the second coarse powder and the second fine powder; the vertical mill includes a third coarse material outlet and a third fine material outlet, the third coarse material outlet being connected to the inlet of the second material distribution device to convey the second coarse powder to the second material distribution device; the third fine material outlet being connected to the inlet of the second cyclone collection system, the second cyclone collection system being used to collect and remove dust from the second fine powder; the outlet of the second cyclone collection system being connected to the inlet of the fourth material distribution device, the fourth material distribution device including a second material outlet to be ground and a third finished material outlet, the second material outlet to be ground being connected to the inlet of the ball mill system, the second material outlet to be ground being used to convey a portion of the second fine powder collected by the second cyclone collection system to the inlet of the ball mill system, and the third finished material outlet to output another portion of the second fine powder as finished material.

[0013] According to some embodiments of the present invention, the second cyclone collection system includes a second collecting cylinder and a second dust collector, a third fine material outlet connected to the inlet of the second collecting cylinder, and the second collecting cylinder is used to collect second fine powder; the outlet of the second collecting cylinder is connected to the inlet of the fourth material distribution device; the second collecting cylinder is equipped with a second circulating fan, and the second collecting cylinder also includes a third dust discharge port; the second dust collector includes a second air inlet, a fourth dust discharge port and a fourth finished product outlet; the second air inlet is connected to the third dust discharge port, the fourth dust discharge port is connected to the external space, and the fourth finished product outlet is used to output the second fine powder collected by the second dust collector as finished product.

[0014] According to some embodiments of the present invention, the grinding system further includes a first heating device connected to a roller pressing system, the first heating device being used to provide hot air to the roller pressing system to dry a first material; and / or, the grinding system further includes a second heating device connected to a vertical mill system, the second heating device being used to provide hot air to the vertical mill system to dry a second material.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 A schematic diagram of the grinding system provided in an embodiment of the present invention is shown;

[0018] Figure 2 It shows Figure 1 Schematic diagram of the intermediate roller pressing system;

[0019] Figure 3 It shows Figure 1A schematic diagram of the structure of a vertical mill system.

[0020] Figure label:

[0021] Grinding system 100;

[0022] Roller pressing system 110; Roller press 111; First material distribution device 112; First bucket elevator 114; First flow stabilizing bin 115; Air classifier 116; Static air classifier 1161; Dynamic air classifier 1162; Third material distribution device 118;

[0023] First cyclone collection system 117; first collection cylinder 1171; first circulating fan 1172; first dust collector 1173;

[0024] Vertical mill system 120; vertical mill 121; second material distribution device 122; first conveyor belt 124; second flow stabilizer 125; fourth material distribution device 127;

[0025] Second cyclone collection system 126; second collection cylinder 1261; second circulating fan 1262; second dust collector 1263;

[0026] 130 Ball mill system; 131 Ball mill; 132 Second bucket elevator; 133 Third dust collector;

[0027] First heating device 140; second heating device 150. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0030] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0031] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0032] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] Please see Figures 1 to 3 This application provides a grinding system 100, which includes a roller pressing system 110, a vertical mill system 120, and a ball mill system 130.

[0034] The discharge port of the roller pressing system 110 is connected to the feed port of the ball mill system 130, and the discharge port of the vertical mill system 120 is also connected to the feed port of the ball mill system 130. The roller pressing system 110 is used to grind the first material, and the vertical mill system 120 is used to grind the second material.

[0035] The ball mill system 130 is used to receive the first material and the second material after grinding, and to mix and grind the first material and the second material to obtain the desired third material. Thus, the roller press system 110 and the ball mill system 130 are connected in series, and the vertical mill system 120 is also connected in series with the ball mill system 130. The first material after being ground by the roller press system 110 can enter the ball mill system 130 for grinding, and the second material after being ground by the vertical mill system 120 can also enter the ball mill system 130 for grinding. The ball mill system 130 can mix and grind the first material and the second material to adjust the blending ratio of materials with different shapes, which helps the third material to obtain a better morphological gradation, and can also increase the production capacity of the grinding system 100 and reduce the energy consumption of the grinding system 100.

[0036] As an example, the first material can be raw materials such as clinker and limestone, the second material can be raw materials such as slag and limestone, and the third material can be a mixture of clinker, limestone and slag.

[0037] The roller pressing system 110 is also used to distribute the ground first material. The roller pressing system 110 distributes a portion of the ground first material to the ball mill system 130 and returns another portion of the ground first material to the roller pressing system 110 for further grinding. This helps to control the amount of the first material entering the ball mill system 130, thereby controlling the proportion of the third material and further improving the morphological gradation of the third material. In addition, the first material can be ground multiple times in the roller pressing system 110, which helps to make fuller use of the roller pressing system 110, reduce the energy consumption of the ball mill system 130, and reduce the energy consumption of the grinding system 100.

[0038] And / or, the vertical mill system 120 is also used to distribute the ground second material, distributing a portion of the ground second material to the ball mill system 130 and returning another portion of the ground second material to the vertical mill system 120 for further grinding. This helps to control the feed amount of the second material into the ball mill system 130, thereby controlling the proportion of the third material and further improving the morphological gradation of the third material. In addition, the second material can be ground multiple times in the vertical mill system 120, which helps to make fuller use of the vertical mill system 120, reduce the energy consumption of the ball mill system 130, and reduce the energy consumption of the grinding system 100.

[0039] In some embodiments, the roller pressing system 110 includes a roller press 111 for grinding a first material. The grinding system 120 includes a vertical mill 121 for grinding a second material.

[0040] The shapes of the materials after grinding by the roller press 111, the vertical mill 121, and the ball mill 131 are different. For example, the first material after being rolled by the roller press 111 is roughly in the shape of a sheet, the second material after being vertically ground by the vertical mill 121 is roughly between the shape of a sheet and a ball, and is irregular in shape. After being ground by the ball mill 131, some of the first and second materials are in the shape of a ball.

[0041] Thus, by setting up a roller pressing system 110, a vertical mill system 120, and a ball mill system 130, the grinding system 100 can obtain a third material that is mixed with flakes, spheres, and irregular shapes, so as to adjust the blending ratio of materials with different shapes, which helps the third material to obtain a better morphological gradation.

[0042] Specifically, the roller pressing system 110 includes a first material distribution device 112. The discharge port of the roller press 111 is connected to the inlet of the first material distribution device 112. The discharge port of the first material distribution device 112 is connected to the inlet of the ball mill system 130 and the inlet of the roller press 111. The first material distribution device 112 is used to distribute a portion of the ground first material to the inlet of the ball mill system 130 and return another portion of the ground first material to the inlet of the roller press 111. In this way, the first material distribution device 112 can connect the roller pressing system 110 and the ball mill system 130 in series. The first material after being ground by the roller pressing system 110 can enter the ball mill system 130 for grinding, so that the third material can be mixed with flake and spherical materials, which helps the third material to obtain a better morphological gradation. Furthermore, the first material distribution device 112 can distribute the first material after roller pressing to control the amount of material entering the ball mill system 130, which helps to reduce the energy consumption of the ball mill system 130.

[0043] The vertical mill system 120 includes a second material distribution device 122. The discharge port of the vertical mill 121 is connected to the inlet of the second material distribution device 122. The discharge port of the second material distribution device 122 is connected to both the inlet of the vertical mill 121 and the inlet of the ball mill system 130. The second material distribution device 122 is used to distribute a portion of the ground second material to the inlet of the ball mill system 130 and return another portion of the ground second material to the inlet of the vertical mill 121. In this way, the second material distribution device 122 can connect the vertical mill system 120 and the ball mill system 130 in series. The second material ground by the vertical mill system 120 can enter the ball mill system 130 for grinding, so that the third material can be mixed with spherical or irregularly shaped materials between spherical and flake shapes, which helps the third material to obtain a better morphological distribution. Furthermore, the second material distribution device 122 can distribute the second material after roller pressing to control the amount of material entering the ball mill system 130, which helps to reduce the energy consumption of the ball mill system 130.

[0044] In summary, the roller press system 110 and the vertical mill system 120 can grind different types of materials, and the grinding system 100 can fully utilize the roller press system 110 and the vertical mill system 120 to expand the application range of the grinding system 100. For example, the roller press 111 can grind brittle materials with good grindability, few large pieces, and low moisture content to improve the grinding effect and also contribute to energy saving. Meanwhile, the vertical mill 121 can grind materials with high moisture content, large pieces, poor gradation, high viscosity, poor grindability, and high abrasiveness to improve the grinding effect and also contribute to energy saving.

[0045] In addition, the roller press system 110 is equipped with a first material distribution device 112, which can convey a portion of the first material after grinding by the roller press 111 to the ball mill system 130 to control the feed rate of the first material into the ball mill system 130. The first material distribution device 112 can also re-feed another portion of the first material after grinding by the roller press 111 back to the roller press 111 for further grinding, allowing the first material to be ground multiple times in the roller press 111, thus making fuller use of the roller press 111 and reducing the energy consumption of the ball mill system 130. And / or, the vertical mill system 120 is equipped with a second material distribution device 122, which can convey a portion of the second material after grinding by the vertical mill 121 to the ball mill system 130 to control the feed rate of the second material into the ball mill system 130. The second material distribution device 122 can also transport another part of the second material that has been ground by the vertical mill 121 back to the vertical mill 121 for grinding, so that the second material can be ground multiple times in the vertical mill 121, which helps to make fuller use of the vertical mill 121 and reduces the energy consumption of the ball mill system 130.

[0046] It should be noted that the roller pressing system 110 can be connected in series with the ball mill system 130 via the first material distribution device 112. If the roller pressing system 110 is not equipped with the first material distribution device 112, the discharge port of the roller press 111 can be directly connected to the feed port of the ball mill system 130, or the discharge port of the roller press 111 can be connected to the feed port of the ball mill system 130 via a conveying device.

[0047] Similarly, the vertical mill system 120 can be connected in series with the ball mill system 130 via the second material distribution device 122. If the vertical mill system 120 is not equipped with the second material distribution device 122, the discharge port of the vertical mill 121 can be directly connected to the feed port of the ball mill system 130, or the discharge port of the vertical mill 121 can be connected to the feed port of the ball mill system 130 via a conveying device.

[0048] The conveying device can be an inclined chute, a conveyor belt, a bucket elevator, or other conveying device.

[0049] In some embodiments, the roller pressing system 110, the vertical mill system 120, and the ball mill system 130 can be used individually or in combination, so that the grinding system 100 can produce a variety of materials, which helps to achieve product diversification.

[0050] For example, the roller mill system 110 and the ball mill system 130 can be used in series to produce cement. The vertical mill system 120 can be used alone to produce stone powder.

[0051] In some embodiments, the roller pressing system 110, the vertical mill system 120, and the ball mill system 130 can be used in combination to reduce the energy consumption of the grinding system 100.

[0052] For example, the vertical mill system 120 can grind mixed materials such as slag and limestone, which are then conveyed to the ball mill system 130 after grinding. The roller press system 110 can grind raw materials such as clinker and limestone, which are then conveyed to the ball mill system 130 after grinding. The ball mill system 130 can mix and grind the ground materials of slag, limestone and clinker to obtain the finished cement product.

[0053] Please see Figures 1 to 2 In some embodiments, the roller pressing system 110 may further include a first feeding device, a first bucket elevator 114, and a first flow stabilizing chamber 115 connected in sequence. The outlet of the first flow stabilizing chamber 115 may be connected to the inlet of the roller press 111. The first material may be weighed in the first feeding device, and the weighed first material may be lifted by the first bucket elevator 114 to enter the first flow stabilizing chamber 115. The first flow stabilizing chamber 115 may be located at the inlet of the roller press 111. The first material entering the roller press 111 may first enter the first flow stabilizing chamber 115 for flow stabilization, and then the first flow stabilizing chamber 115 feeds the stabilized first material into the roller press 111 for grinding.

[0054] Understandably, the first material can be a single material or a mixture of multiple materials.

[0055] In some embodiments, the roller pressing system 110 may further include a classifier 116, which can be used to classify the first material that has been ground by the roller press 111 to select the first coarse powder.

[0056] The discharge port of the roller press 111 can be connected to the feed port of the classifier 116, so that the first material after roller pressing can enter the classifier 116 for powder selection.

[0057] The classifier 116 may include a first coarse material outlet and a second coarse material outlet.

[0058] The first coarse material outlet can be connected to the inlet of the first distribution device 112, and the outlet of the first distribution device 112 can be connected to the inlet of the ball mill system 130 and the inlet of the classifier 116. A portion of the first coarse powder selected by the classifier 116 can enter the first distribution device 112 for distribution. The first distribution device 112 is used to transport a portion of the first coarse powder entering the first distribution device 112 to the inlet of the ball mill system 130, and to transport another portion of the first coarse powder entering the first distribution device 112 back to the classifier 116 for classification. Thus, the first distribution device 112 can control the feed amount of the first coarse powder entering the ball mill system 130, which helps to better control the morphology and gradation of the third material and can also prevent the ball mill system 130 from being overloaded.

[0059] The second coarse material outlet can be connected to the feed inlet of the roller press 111. Another portion of the first coarse powder selected by the classifier 116 can enter the roller press 111 through the second coarse material outlet for re-grinding in the roller press 111. This helps to make full use of the roller press 111, reduce the energy consumption of the ball mill system 130, and thus reduce the energy consumption of the grinding system 100.

[0060] In some embodiments, the roller pressing system 110 may further include a first cyclone collection system 117 and a third material distribution device 118.

[0061] The classifier 116 may also include a first fine material outlet.

[0062] The first fine material outlet can be connected to the feed inlet of the first cyclone collection system 117. The classifier 116 can also be used to select the first fine powder of the first material after being ground by the roller press 111. The first fine powder selected by the classifier 116 can enter the first cyclone collection system 117 through the first fine material outlet. The first cyclone collection system 117 can be used to collect and remove dust from the first fine powder.

[0063] The discharge port of the first cyclone collection system 117 can be connected to the inlet of the third material distribution device 118, which may include a first material outlet and a first finished material outlet.

[0064] The first grinding material outlet can be connected to the feed inlet of the ball mill system 130. This outlet can be used to transport a portion of the first fine powder collected by the first cyclone collection system 117 to the feed inlet of the ball mill system 130. The first finished product outlet is used to output another portion of the first fine powder as finished product. Thus, the third material distribution device 118 can distribute the first fine powder collected by the first cyclone collection system 117, directly outputting a portion as finished product and transporting the other portion to the ball mill system 130 for grinding. This helps prevent all the first fine powder collected by the first cyclone system from entering the ball mill system 130, thus avoiding over-grinding and affecting the energy consumption of the ball mill system 130. It also helps prevent over-grinding from affecting the morphology and gradation of the third material. For example, the first finished product outlet can be connected to a warehouse or finished product storage area.

[0065] In some embodiments, the first cyclone collection system 117 may include a first collection cylinder 1171, with a first fine material outlet connected to the inlet of the first collection cylinder 1171. The first collection cylinder 1171 is used to collect the first fine powder, so that the first fine powder selected by the powder classifier 116 can enter the first collection cylinder 1171 for collection through the first fine material outlet.

[0066] The discharge port of the first collecting cylinder 1171 can be connected to the inlet of the third distributing device 118. The third distributing device 118 can distribute the first fine powder collected in the first collecting cylinder 1171, so that a portion of the first fine powder is transported to the ball mill system 130 for grinding, and the other portion of the first fine powder is output as finished product.

[0067] The first collecting cylinder 1171 may be equipped with a first circulating fan 1172. The first collecting cylinder 1171 also includes a first dust discharge port, which is connected to the external space. The first circulating fan 1172 can agitate the airflow inside the first collecting cylinder 1171 to agitate the first fine powder, thereby separating the first fine powder and dust. The dust can be discharged to the external space through the first dust discharge port with the airflow, which helps to improve the quality of the first fine powder.

[0068] In some embodiments, the first cyclone collection system 117 may further include a first dust collector 1173, which can collect the first fine powder discharged through the first dust outlet, thereby helping to reduce the waste of the first fine powder and increase production capacity.

[0069] Specifically, the first dust collector 1173 may include a first air inlet, a second dust outlet, and a second finished product outlet. The first air inlet can be connected to the first dust outlet, and the second dust outlet can be connected to an external space. The second finished product outlet is used to output a portion of the first fine powder collected by the first dust collector 1173 as finished product. In this way, the first dust collector 1173 can collect the dust and first fine powder discharged through the first dust outlet. When the airflow flows within the first dust collector 1173, the dust collected within the first dust collector 1173 is discharged to retain the first fine powder, which helps reduce the waste of the first fine powder and improve production capacity. The first fine powder collected within the first dust collector 1173 can be directly output as finished product of the first material. For example, the second finished product outlet can be connected to a warehouse or finished product storage area.

[0070] The first dust collector 1173 can receive the airflow from the first circulating fan 1172 to discharge the dust inside the first dust collector 1173, or the first dust collector 1173 can be equipped with a first exhaust fan, which can discharge the dust inside the first dust collector.

[0071] In some embodiments, the classifier 116 can also be used to disperse and dry the first material. Specifically, the classifier 116 may include a dynamic classifier 1162 and a static classifier 1161. The static classifier 1161 can disperse, dry and classify the first material, while the dynamic classifier 1162 can perform secondary classification on the first material after it has been classified by the static classifier 1161.

[0072] The dynamic classifier 1162 may include a first coarse material outlet and a first fine material outlet, while the static classifier 1161 may include a second coarse material outlet and a second fine material outlet. The discharge port of the roller press 111 can be connected to the feed port of the static classifier 1161, and the second fine material outlet can be connected to the feed port of the dynamic classifier 1162. In this way, the static classifier 1161 and the dynamic classifier 1162 can cooperate to perform secondary classification on the first material, which helps to more fully mix the first material after grinding by the roller press 111, and can also better control the size of the first material entering the ball mill system 130, which helps to obtain a better morphological gradation of the third material.

[0073] Specifically, the discharge port of the roller press 111 can be connected to the feed port of the static classifier 1161, and the second coarse material outlet of the static classifier 1161 can be connected to the feed port of the roller press 111, or the second coarse material outlet of the static classifier 1161 can be connected to the feed port of the first stabilizing chamber 115. The second fine material outlet of the static classifier 1161 can be connected to the feed port of the dynamic classifier 1162. In this way, the static classifier 1161 can separate the coarse and fine powders of the first material after grinding by the roller press system 110, and the coarse powder can re-enter the roller press 111 for grinding through the second coarse material outlet.

[0074] The dynamic classifier 1162 can receive the fine powder of the first material selected by the static classifier 1161, and further classify the fine powder of the first material to separate the first coarse powder and the first fine powder. The first coarse powder outlet of the dynamic classifier 1162 can be connected to the first distribution device 112, which can receive the first coarse powder after being classified by the static classifier 1161, and send a portion of the first coarse powder to the ball mill system 130 for grinding, and send another portion of the first coarse powder to the static classifier 1161 for re-classification. The first fine powder outlet of the dynamic classifier 1162 can be connected to the feed inlet of the first cyclone collection system 117 to send the first fine powder to the first cyclone collection system 117 for collection.

[0075] Among them, the static air classifier 1161 can be a V-type air classifier 116, and one of the discharge ports of the first material distribution device 112 can be connected to the conical bottom of the static air classifier 1161.

[0076] Please see Figure 1 and Figure 3In some embodiments, the vertical mill system 120 may further include a second batching device, a first conveyor belt 124, and a second flow stabilizing chamber 125 connected in sequence. The outlet of the second flow stabilizing chamber 125 may be connected to the inlet of the vertical mill 121. The second material may be weighed in the second batching device, and the weighed second material may be conveyed to the second flow stabilizing chamber 125 via the first conveyor belt 124. The second flow stabilizing chamber 125 may be located at the inlet of the vertical mill 121. The second material entering the vertical mill 121 may first enter the second flow stabilizing chamber 125 for flow stabilization, and then the second flow stabilizing chamber 125 feeds the stabilized second material into the vertical mill 121 for grinding.

[0077] Understandably, the second material can be a single material or a mixture of multiple materials.

[0078] In some embodiments, the vertical mill 121 can be used to grind a second material and separate a second coarse powder and a second fine powder. For example, the vertical mill 121 can be a vertical mill 121 with a powder selection function, and the specific structure can be referred to the prior art, which will not be described in detail here.

[0079] The vertical mill system 120 may also include a second cyclone collection system 126 and a fourth material distribution device 127.

[0080] The vertical mill 121 may include a third coarse material outlet and a third fine material outlet. The third coarse material outlet may be connected to the feed inlet of the second distribution device 122 to convey the second coarse powder to the second distribution device 122. The second distribution device 122 may distribute the second coarse powder. The second distribution device 122 may convey a portion of the second coarse powder to the feed inlet of the ball mill system 130 and convey another portion of the second coarse powder back to the feed inlet of the vertical mill 121. Thus, the second distribution device 122 may control the feed amount of the second coarse powder entering the ball mill system 130, which helps the third material to obtain a better morphological gradation.

[0081] The third fine material outlet can be connected to the inlet of the second cyclone collection system 126, which can be used to collect and remove dust from the second fine powder.

[0082] The outlet of the second cyclone collecting system 126 can be connected to the inlet of the fourth material distribution device 127, which may include a second grinding material outlet and a third finished material outlet.

[0083] The second grinding material outlet can be connected to the feed inlet of the ball mill system 130. This outlet is used to transport a portion of the second fine powder collected by the second cyclone collection system 126 to the feed inlet of the ball mill system 130. The third finished material outlet is used to output another portion of the second fine powder as finished material. Thus, the fourth material distribution device 127 can distribute the second fine powder collected by the second cyclone collection system 126, allowing a portion of the qualified second fine powder to be directly output as the finished product of the second material, while the other portion is transported to the ball mill system 130 for grinding. This helps prevent all the second fine powder collected by the second cyclone system from entering the ball mill system 130, thus avoiding over-grinding and affecting the energy consumption of the ball mill system 130. It also helps prevent over-grinding from affecting the morphology and gradation of the third material. For example, the third finished material outlet can be connected to a warehouse or finished product storage area.

[0084] In some embodiments, the second cyclone collection system 126 includes a second collection cylinder 1261, and a third fine material outlet is connected to the feed inlet of the second collection cylinder 1261. The second collection cylinder 1261 is used to collect the second fine powder. Thus, the second fine powder selected by the vertical mill 121 can enter the second collection cylinder 1261 for collection through the third fine material outlet.

[0085] The outlet of the second collecting cylinder 1261 can be connected to the inlet of the fourth distributing device 127. The fourth distributing device 127 can distribute the second fine powder collected in the first collecting cylinder 1171, so that a portion of the second fine powder is transported to the ball mill system 130 for grinding, and the other portion of the second fine powder is output as finished product.

[0086] The second collection cylinder 1261 may be equipped with a second circulating fan 1262. The second collection cylinder 1261 also includes a third dust discharge port, which can be connected to an external space. The second circulating fan 1262 can agitate the airflow inside the second collection cylinder 1261 to agitate the second fine powder, thereby separating the second fine powder and dust. The dust can be discharged to the external space through the second dust discharge port with the airflow, which helps to improve the quality of the second fine powder.

[0087] In some embodiments, the second cyclone collection system 126 further includes a second dust collector 1263, which can collect the second fine powder discharged through the second dust outlet, helping to reduce the waste of the second fine powder and increase production capacity.

[0088] Specifically, the second dust collector 1263 may include a second air inlet, a fourth dust outlet, and a fourth finished product outlet. The second air inlet can be connected to a third dust outlet, the fourth dust outlet can be connected to an external space, and the fourth finished product outlet is used to output the second fine powder collected by the second dust collector 1263 as finished product. Thus, the second dust collector 1263 can collect the dust and second fine powder discharged through the second dust outlet. When the airflow flows within the second dust collector 1263, the dust collected inside is discharged, retaining the second fine powder, which helps reduce waste and increase production capacity. The second fine powder collected within the second dust collector 1263 can be directly output as finished product of the second material. For example, the fourth finished product outlet can be connected to a warehouse or finished product storage area.

[0089] The second dust collector 1263 can receive the airflow from the second circulating fan 1262 to discharge the dust inside the second dust collector 1263, or the second dust collector 1263 can be equipped with a second exhaust fan, which can discharge the dust inside the second dust collector.

[0090] In some embodiments, the grinding system 100 may further include a first heating device 140, which may be connected to the roller pressing system 110. The first heating device 140 is used to provide hot air to the roller pressing system 110 to dry the first material, thereby expanding the application range of the roller pressing system 110 and enabling the roller pressing system 110 to better grind materials with high moisture and high viscosity.

[0091] The first heating device 140 can be a combustion furnace, kiln tail, or other device that provides hot air.

[0092] For example, the first heating device 140 can be connected to one or more of the first batching system, the first bucket elevator 114, the first flow stabilizing bin 115, the roller press 111, the classifier 116, the first collecting cylinder 1171, and the first dust collector 1173 to dry the first material in the first batching system, the first bucket elevator 114, the first flow stabilizing bin 115, the roller press 111, the classifier 116, and the first cyclone collecting system 117.

[0093] In some embodiments, the grinding system 100 may further include a second heating device 150, which may be connected to the vertical mill system 120. The second heating device 150 is used to provide hot air to the vertical mill system 120 to dry the second material, thereby expanding the application range of the vertical mill system 120 and enabling the vertical mill system 120 to better grind materials with high moisture and high viscosity.

[0094] The second heating device 150 can be a combustion furnace, kiln tail, or other device that provides hot air.

[0095] For example, the first heating device 140 can be connected to one or more of the vertical mill 121, the second collection cylinder 1261, and the second dust collector 1263 to dry the second material in the vertical mill 121, the second collection cylinder 1261, and the second dust collector 1263.

[0096] Please see Figure 1 In some embodiments, the ball mill system 130 may include a ball mill 131, and one of the discharge ports of the first material distribution device 112 (e.g., Figure 2 (as shown) and one of the discharge ports of the second material distribution device 122 (e.g. Figure 3 (As shown) can be connected to the feed inlet of ball mill 131. The first and second grinding material outlets can both be connected to the feed inlet of ball mill 131. The discharge outlet of ball mill 131 can be used to output the third material as finished product.

[0097] The third material produced after grinding by the ball mill 131 can be output via a conveying device. For example, the ball mill system 130 may also include a second bucket elevator 132, the discharge port of the ball mill 131 may be connected to the second bucket elevator 132, or the discharge port of the ball mill 131 may be connected to the bucket elevator via a conveying device to convey the third material to the second bucket elevator 132, and the second bucket elevator 132 lifts the third material to output it to a warehouse or finished product warehouse.

[0098] In some embodiments, the ball mill system 130 may include a third dust collector 133, which may be connected to the ball mill 131 to collect dust generated during the operation of the ball mill 131. The third dust collector 133 may be equipped with a third exhaust fan, which can discharge the dust in the third dust collector 133 to the outside space.

[0099] The grinding system 100 provided in this application embodiment allows the first material ground by the roller pressing system 110 and the second material ground by the vertical mill system 120 to enter the ball mill system 130 for mixed grinding to obtain a third material. The third material is formulated with a variety of materials of different shapes, which helps to obtain a better morphological gradation. Furthermore, the roller pressing system 110 can also distribute a portion of the ground first material to the ball mill system 130 and return another portion of the ground first material to the roller pressing system 110 for re-grinding, which helps to control the feed amount of the first material into the ball mill system 130, thereby controlling the proportion of the third material and further improving the morphological gradation of the third material. The first material can also be ground multiple times in the roller pressing system 110, which helps to make fuller use of the roller pressing system 110, reduce the energy consumption of the ball mill system 130, and reduce the energy consumption of the grinding system 100. And / or, the vertical mill system 120 can also distribute a portion of the ground second material to the ball mill system 130, and return another portion of the ground second material to the vertical mill system 120 for further grinding. This helps to control the feed amount of the second material into the ball mill system 130, thereby controlling the proportion of the third material and further improving the morphological gradation of the third material. The second material can also be ground multiple times in the vertical mill system 120, which helps to make fuller use of the vertical mill system 120, reduce the energy consumption of the ball mill system 130, and reduce the energy consumption of the grinding system 100.

[0100] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A grinding system, characterized in that, It includes a roller pressing system, a vertical mill system, and a ball mill system, wherein the discharge port of the roller pressing system and the discharge port of the vertical mill system are both connected to the inlet of the ball mill system; The roller pressing system is used to grind the first material, and the vertical mill system is used to grind the second material; the ball mill system is used to receive the ground first material and the ground second material, and to mix and grind the first material and the second material to obtain the desired third material; The roller pressing system is further used to distribute the ground first material, sending a portion of the ground first material to the ball mill system and returning another portion of the ground first material to the roller pressing system for further grinding; and / or, the vertical mill system is further used to distribute the ground second material, sending a portion of the ground second material to the ball mill system and returning another portion of the ground second material to the vertical mill system for further grinding.

2. The grinding system according to claim 1, characterized in that, The roller pressing system includes a roller press for grinding the first material; the vertical mill system includes a vertical mill for grinding the second material. The roller pressing system further includes a first material distribution device. The discharge port of the roller press is connected to the inlet of the first material distribution device. The discharge port of the first material distribution device is connected to the inlet of the ball mill system and the inlet of the roller press. The first material distribution device is used to distribute a portion of the ground first material to the inlet of the ball mill system and return another portion of the ground first material to the inlet of the roller press. And / or, the vertical mill system further includes a second material distribution device, wherein the discharge port of the vertical mill is connected to the inlet of the second material distribution device, and the discharge port of the second material distribution device is connected to the inlet of the vertical mill and the inlet of the ball mill system respectively; the second material distribution device is used to distribute a portion of the ground second material to the inlet of the ball mill system, and to return another portion of the ground second material to the inlet of the vertical mill.

3. The grinding system according to claim 2, characterized in that, The roller pressing system also includes a classifier, which is used to classify the first material after it has been ground by the roller press, so as to select the first coarse powder. The discharge port of the roller press is connected to the inlet of the classifier; the classifier includes a first coarse material outlet and a second coarse material outlet, the second coarse material outlet is connected to the inlet of the roller press, the first coarse material outlet is connected to the inlet of the first material distribution device, and the discharge port of the first material distribution device is connected to the inlet of the ball mill system and the inlet of the classifier respectively. A portion of the first coarse powder enters the roller press through the second coarse material outlet; another portion of the first coarse powder enters the first material distribution device for distribution. The first material distribution device is used to transport a portion of the first coarse powder to the feed inlet of the ball mill system and to transport a portion of the first coarse powder back to the classifier for powder selection.

4. The grinding system according to claim 3, characterized in that, The roller pressing system also includes a first cyclone collection system and a third material distribution device, and the powder classifier also includes a first fine material outlet; The first fine material outlet is connected to the feed inlet of the first cyclone collection system; the powder classifier is also used to select the first fine powder of the first material after it has been ground by the roller press, and the first cyclone collection system is used to collect and remove dust from the first fine powder; The discharge port of the first cyclone collecting system is connected to the inlet of the third material distribution device. The third material distribution device includes a first grinding material outlet and a first finished material outlet. The first grinding material outlet is connected to the inlet of the ball mill system. The first grinding material outlet is used to transport a portion of the first fine powder collected by the first cyclone collecting system to the inlet of the ball mill system. The first finished material outlet is used to output another portion of the first fine powder as finished material.

5. The grinding system according to claim 4, characterized in that, The first cyclone collection system includes a first collection cylinder, and the first fine material outlet is connected to the inlet of the first collection cylinder. The first collection cylinder is used to collect the first fine powder. The discharge port of the first collecting cylinder is connected to the inlet of the third distributing device; the first collecting cylinder is equipped with a first circulating fan, and the first collecting cylinder also includes a first dust discharge port, which is connected to the external space.

6. The grinding system according to claim 5, characterized in that, The first cyclone collection system further includes a first dust collector, which includes a first air inlet, a second dust outlet, and a second finished product outlet. The first air inlet is connected to the first dust outlet, the second dust outlet is connected to the external space, and the second finished product outlet is used to output a portion of the first fine powder collected by the first dust collector as finished product.

7. The grinding system according to claim 3, characterized in that, The air classifier includes a static air classifier and a dynamic air classifier. The dynamic air classifier includes a first coarse material outlet and a first fine material outlet. The static air classifier includes a second coarse material outlet and a second fine material outlet. The discharge port of the roller press is connected to the inlet of the static classifier, and the second fine material outlet is connected to the inlet of the dynamic classifier.

8. The grinding system according to claim 2, characterized in that, The vertical mill system further includes a second cyclone collection system and a fourth material distribution device; the vertical mill is used to grind the second material and select the second coarse powder and the second fine powder; the vertical mill includes a third coarse material outlet and a third fine material outlet, the third coarse material outlet being connected to the inlet of the second material distribution device to convey the second coarse powder to the second material distribution device; the third fine material outlet being connected to the inlet of the second cyclone collection system, the second cyclone collection system being used to collect and remove dust from the second fine powder; The outlet of the second cyclone collecting system is connected to the inlet of the fourth material distribution device. The fourth material distribution device includes a second grinding material outlet and a third finished material outlet. The second grinding material outlet is connected to the inlet of the ball mill system. The second grinding material outlet is used to transport a portion of the second fine powder collected by the second cyclone collecting system to the inlet of the ball mill system. The third finished material outlet is used to output another portion of the second fine powder as finished material.

9. The grinding system according to claim 8, characterized in that, The second cyclone collection system includes a second collection cylinder and a second dust collector. The third fine material outlet is connected to the inlet of the second collection cylinder, which is used to collect the second fine powder. The outlet of the second collection cylinder is connected to the inlet of the fourth material distribution device. The second collection cylinder is equipped with a second circulating fan and also includes a third dust discharge port. The second dust collector includes a second air inlet, a fourth dust outlet, and a fourth finished product outlet; the second air inlet is connected to the third dust outlet, the fourth dust outlet is connected to the external space, and the fourth finished product outlet is used to output the second fine powder collected by the second dust collector as finished product.

10. The grinding system according to claim 1, characterized in that, The grinding system further includes a first heating device, which is connected to the roller pressing system and is used to provide hot air to the roller pressing system to dry the first material. And / or, the grinding system further includes a second heating device connected to the vertical mill system, the second heating device being used to provide hot air to the vertical mill system to dry the second material.

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