Continuous circulation grinding production line

Abstract

The utility model provides a continuous circulating grinding production line. The continuous circulating grinding production line comprises a primary grinding machine, a secondary grinding machine, a finished product bin and a screening device, the sifter comprises a primary grinding sifter, a secondary grinding sifter and a tertiary grinding sifter; the screened qualified product discharging end of the primary grinding and screening device is communicated with the feeding end of the secondary grinding and screening device; the screened qualified product discharging end of the secondary grinding and screening device is communicated with the feeding end of the third-stage grinding and screening device; a feeding hole of the first-stage grinding machine is communicated with a feeding device, and a discharging hole of the first-stage grinding machine is communicated with a feeding hole of the primary grinding screener; the discharging ends of unqualified screened products of the primary grinding and screening device and the secondary grinding and screening device are communicated with a feeding hole of the secondary grinding machine; and a discharge port of the third-stage grinding sifter and a discharge port of the second-stage grinding machine are jointly communicated with a finished product bin. According to the utility model, the continuous grinding and screening of materials are realized through the two-stage grinding machine and the screening device.

Description

Technical Field

[0001] This utility model relates to the field of crushing and grinding, and in particular to a continuous circulating grinding production line. Background Technology

[0002] As a crucial part of industrial production, the crushing and grinding of raw materials is an indispensable step in the current production process. To ensure the quality of the finished product after crushing, continuous circulating grinding production lines are often used to repeatedly grind the materials until the product meets the standards. Existing continuous circulating grinding production lines may consist of a single grinder and multiple classifiers, which then repeatedly grind the graded and sieved powder, or multiple grinders and multiple circulating tanks may be used for circulating grinding.

[0003] For example, a utility model invention patent with application number 200920140946.2 and titled "Micronized and Segmented Powder Processing System for Grinding Mills" discloses a grading facility located between a grinding mill and a collector. This grading facility is a multi-stage grading unit composed of multiple classifiers connected in sequence. The first-stage classifier is installed at the powder outlet of the Raymond mill, and the powder outlet of the last-stage classifier is connected to the collector. Each secondary classifier has a receiving port at its bottom hopper, which can connect to the grinding zone of the grinding mill. The grading accuracy of each classifier in the multi-stage grading unit is the same or the grading accuracy increases sequentially. This utility model micronized and segmented powder processing system for grinding mills not only realizes the function of producing superfine powder from grinding mills but also has the function of producing segmented micronized powder.

[0004] However, this patent addresses materials that do not meet requirements by adding the screened-out substandard materials back into the initial grinding mill for further crushing. While this method can sort and further crush the product during the grinding process, increasing the output of the finished product, it still involves adding the screened-out substandard materials back into the initial grinding mill along with the initially crushed material. Since the internal capacity of the grinding mill is limited, the grinding process can become clogged by substandard materials, preventing the continuous processing of newly added materials and reducing grinding efficiency. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a continuous circulating grinding production line to realize the continuous grinding of input materials and improve the output rate of finished products.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A continuous circulating grinding production line includes a primary grinding mill, a secondary grinding mill, a finished product silo, and a screening device;

[0008] The sieve includes a primary grinding sieve, a secondary grinding sieve, and a tertiary grinding sieve;

[0009] The discharge end of the primary grinding sieve that filters out qualified products is connected to the feed end of the secondary grinding sieve.

[0010] The discharge end of the secondary grinding sieve that filters out qualified products is connected to the feed end of the tertiary grinding sieve.

[0011] The feed inlet of the primary grinding mill is connected to the feeding device, and the discharge outlet of the primary grinding mill is connected to the feed inlet of the primary grinding sieve.

[0012] The discharge end of the primary grinding sieve and the secondary grinding sieve for screening out defective products is connected to the feed inlet of the secondary grinding mill;

[0013] The discharge ports of the three-stage grinding and screening device and the two-stage grinding machine are connected to a finished product silo.

[0014] Furthermore, a discharge hopper is provided between the primary grinder and the screener to temporarily store the discharge from the primary grinder before it enters the screener.

[0015] Furthermore, the feed inlets of the primary and secondary grinding mills are equipped with vacuum feeders for conveying materials into the grinding mills.

[0016] Furthermore, the primary grinding mill includes a primary grinding chamber and a dry grinding mill;

[0017] The primary grinding chamber is installed above the dry grinding mill and is used to temporarily store unground materials.

[0018] Furthermore, the grinding particle size of the secondary grinding mill is smaller than that of the primary grinding mill.

[0019] Furthermore, the particle size of the material screened by the primary grinding screener, the secondary grinding screener, and the tertiary grinding screener decreases sequentially.

[0020] The beneficial effects of this utility model are:

[0021] This invention incorporates a two-stage grinding mill. After the product from the first-stage grinding mill is screened by a sieving machine, the unqualified product is fed into the second-stage grinding mill for further grinding. This prevents unqualified screened products from entering the first-stage grinding mill and blocking the entry of new material into the grinding process, thus avoiding a decrease in grinding efficiency. Furthermore, using the finer second-stage grinding mill to grind the unqualified material from the first-stage grinding mill results in better product quality and faster production speed compared to directly grinding unqualified material using the first-stage grinding mill, while reducing the number of cycles required. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a continuous circulating grinding production line according to the present invention.

[0023] In the diagram: 1. Primary grinding mill; 2. Secondary grinding mill; 3. Screening device; 4. Primary grinding screen; 5. Secondary grinding screen; 6. Tertiary grinding screen; 7. Grinding chamber; 8. Dry grinding mill; 9. Discharge hopper; 10. Finished product hopper; 11. Vacuum feeder Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1 As shown in the figure, this utility model embodiment proposes a continuous circulating grinding production line, including a primary grinding mill 1, a secondary grinding mill 2, a finished product bin 10, and a sieve 3.

[0026] The sieve 3 includes a primary grinding sieve 4, a secondary grinding sieve 5, and a tertiary grinding sieve 6.

[0027] The discharge end of the primary grinding sieve 4, which screens out qualified products, is connected to the feed end of the secondary grinding sieve 5.

[0028] The discharge end of the secondary grinding sieve 5, which screens out qualified products, is connected to the feed end of the tertiary grinding sieve 6.

[0029] The feed inlet of the primary grinding mill 1 is connected to the feeding device, and the discharge outlet of the primary grinding mill 1 is connected to the feed inlet of the primary grinding sieve 4.

[0030] The discharge end of the primary grinding screen 4 and the secondary grinding screen 5, which are used to screen out unqualified products, is connected to the feed inlet of the secondary grinding mill 2.

[0031] The discharge ports of the three-stage grinding and screening device 6 and the two-stage grinding machine 2 are connected to the finished product hopper 10.

[0032] In this embodiment, a batch of materials needs to be crushed and ground to meet certain crushing standards. Therefore, the materials are fed into a primary grinding mill 1, and the ground products enter a sieve 3 through the discharge port of the primary grinding mill 1. During sieving, the materials first enter a primary grinding sieve 4 through the feed port. The primary grinding sieve 4 has two discharge ports, one for outputting qualified products and the other for outputting unqualified products. Qualified products are fed into a secondary grinding sieve 5, while unqualified products are fed into a secondary grinding mill 2. The materials entering the secondary grinding sieve 5 undergo further finer sieving. The secondary grinding sieve 5 also has two discharge ports. Qualified products, after sieving, enter a tertiary grinding sieve 6 through the qualified product discharge port on the secondary grinding sieve 5, while unqualified products are fed into the secondary grinding mill 2 for further grinding. The tertiary grinding sieve 6 then filters out qualified products according to mesh size and sends them to the finished product bin 10, while unqualified products are sent to the secondary grinding mill 2. The defective products that are screened out and sent to the secondary grinding mill 2 will be finely ground by the secondary grinding mill 2 before being fed into the finished product bin 10. Once the material is fed into the finished product bin, the screening and grinding of a batch of material is completed. During this process, the primary grinding mill 1 remains operational, continuously processing the input material. The specific process is as follows:

[0033] Furthermore, the primary grinding mill 1 includes a grinding chamber 7 and a dry grinding mill 8.

[0034] The grinding chamber 7 is installed above the dry grinding mill 8 and is used to temporarily store unground materials.

[0035] Specifically, the input material is first temporarily stored in the grinding chamber of the primary grinder 1, and then sequentially fed into the dry grinder 8 for crushing and grinding. The material to be processed in the grinding chamber will be filled into the dry grinder 8 under the action of gravity, realizing automatic feeding and grinding.

[0036] Furthermore, a discharge hopper 9 is provided between the primary grinding mill 1 and the screen 3 to temporarily store the discharge from the primary grinding mill 1 before it enters the screen 3.

[0037] In addition, if the product of the primary grinding mill 1 directly enters the screening device 3, the screening effect will be poor due to the impact of the crushed material. Therefore, a discharge hopper 9 is required to temporarily store the discharge of the primary grinding mill 1 to avoid direct impact on the screening effect.

[0038] Furthermore, the feed inlets of the primary grinding mill 1 and the secondary grinding mill 2 are equipped with vacuum feeders 11 for conveying materials into the grinding mills.

[0039] When inputting materials, considering efficiency and the state of the materials, the vacuum feeder 11 can use atmospheric pressure to pump the materials into the grinder with high efficiency, while also effectively preventing the materials from being impacted and scattered, thus avoiding unnecessary material processing losses.

[0040] Furthermore, the grinding particle size of the secondary grinding mill 2 is smaller than that of the primary grinding mill 1.

[0041] Furthermore, the particle size of the material screened by the primary grinding screener 4, the secondary grinding screener 5, and the tertiary grinding screener 6 decreases sequentially.

[0042] In another embodiment, the unqualified materials after screening need to be further crushed and ground. To shorten the screening process, a secondary grinder 2 with a higher processing capacity can be used to crush and grind the screened products. Firstly, because the product particles after being crushed by the primary grinder 1 are small, using a grinder with higher processing fineness as the secondary grinder 2 for reprocessing is less costly. Secondly, using higher processing fineness can prevent the products after secondary grinding from re-entering the screening step, thus avoiding blockage of the screening rate. Furthermore, when multiple specifications of products are needed, unqualified products can be reprocessed to another specification as required, avoiding material waste.

[0043] Compared with the prior art, the present invention has at least the following beneficial effects:

[0044] This invention incorporates a two-stage grinding mill. After the product from the first-stage grinding mill is screened by a sieving machine, the unqualified product is fed into the second-stage grinding mill for further grinding. This prevents unqualified screened products from entering the first-stage grinding mill and blocking the entry of new material into the grinding process. Furthermore, using the finer second-stage grinding mill to grind the unqualified material already ground by the first-stage mill is more effective than directly grinding the unqualified material using the first-stage mill, resulting in faster production speeds and fewer required cycles.

[0045] The changes in the above technical features can be understood and implemented by those skilled in the art through textual description, therefore no further drawings are required.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is used only to illustrate the technical solution of this utility model, and is not intended to limit the protection scope of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the protection scope of this utility model.

Claims

1. A continuous circulating grinding production line, characterized in that, include: A primary grinding mill (1), a secondary grinding mill (2), and a sieve (3); The sieve (3) includes a primary grinding sieve (4), a secondary grinding sieve (5) and a tertiary grinding sieve (6). The discharge end of the primary grinding sieve (4) that filters out qualified products is connected to the feed end of the secondary grinding sieve (5); The discharge end of the secondary grinding sieve (5) that filters out qualified products is connected to the feed end of the tertiary grinding sieve (6); The feed inlet of the primary grinding mill (1) is connected to the feeding device, and the discharge outlet of the primary grinding mill (1) is connected to the feed inlet of the primary grinding screen (4). The discharge end of the primary grinding screen (4) and the secondary grinding screen (5) for screening out unqualified products is connected to the feed inlet of the secondary grinding mill (2); The discharge ports of the three-stage grinding and screening device (6) and the two-stage grinding machine (2) are connected to the finished product silo (10).

2. The continuous circulating grinding production line as described in claim 1, characterized in that, A discharge hopper (9) is provided between the primary grinding mill (1) and the screen (3) to temporarily store the discharge of the primary grinding mill (1) before it enters the screen (3).

3. The continuous circulating grinding production line as described in claim 1, characterized in that, Vacuum feeders (11) are provided at the feed inlets of the primary grinding mill (1) and the secondary grinding mill (2) for conveying materials into the grinding mill.

4. The continuous circulating grinding production line as described in claim 1, characterized in that, The primary grinding mill (1) includes a primary grinding chamber (7) and a dry grinding mill (8); The primary grinding chamber (7) is installed above the dry grinding mill (8) and is used to temporarily store materials to be processed.

5. A continuous circulating grinding production line as described in claim 1, characterized in that, The grinding particle size of the secondary grinding mill (2) is smaller than that of the primary grinding mill (1).

6. The continuous circulating grinding production line as described in claim 1, characterized in that, The particle size of the material screened by the primary grinding screen (4), the secondary grinding screen (5), and the tertiary grinding screen (6) decreases sequentially.

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