A recirculating crushing and screening system
The circulating crushing and screening system solves the problem of low screening efficiency in the preparation of micron-sized particles by existing equipment, achieving uniform particle size and high yield, and is suitable for material processing with a narrow particle size range.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 江苏易初锆铪新材料有限公司
- Filing Date
- 2025-06-27
- Publication Date
- 2026-05-29
AI Technical Summary
Existing crushing and grading equipment tends to over-crush micron-sized particles, resulting in low screening efficiency, making it difficult to meet the particle size requirements of 200-800 mesh, and also resulting in low yield.
Design a circulating crushing and screening system, including a raw material silo, a crusher, a crushing silo, a screening machine, a fine material temporary storage silo, a coarse material temporary storage silo, and a packaging machine. It is equipped with multiple circulating silos and valve control. The circulating crushing and screening of materials is realized through the valve opening and closing strategy to ensure that the particle size range is 200-800 mesh.
It achieves uniform material particle size, narrow particle size range, high qualified yield, and is suitable for efficient processing of volatile materials, reducing labor costs and with a high degree of system automation.
Smart Images
Figure CN224293479U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of crushing technology with narrow crushing particle size. More specifically, this utility model relates to a circulating crushing and screening system. Background Technology
[0002] In hydrometallurgy and fine chemical engineering, coprecipitation synthesis of compounds is commonly used for purification, impurity removal, and nanomaterial preparation. Due to the fine particle size of the precursors, the macroscopic size of the prepared compounds is in the millimeter range, but it is easier to achieve submicron or nanometer particle sizes during the crushing stage. General crushing and classifying equipment has significant advantages in preparing nanopowders, but over-crushing can occur when preparing special materials such as micron-sized particles. For example, commonly used airflow crushing and classifying equipment can generally only achieve a D50 < 10 μm when crushing raw materials prepared by coprecipitation; Raymond mill crushing can generally only achieve a D50 < 20 μm. If crushing to a particle size of 200–800 mesh is required, the above equipment can only sieve out a small amount of product that meets the requirements, with an excessively fine proportion. Therefore, when crushing to a particle size of 200–800 mesh, only a weak crushing force mechanical crushing method can be used, and the sieving force for particle size classification also needs to be selected with a gentler approach. A process of crushing, sieving, crushing, and sieving again is necessary to improve the yield. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a material circulation crushing and screening system suitable for weak crushing, low screening efficiency and narrow particle size range requirements.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0005] A circulating crushing and screening system includes, in sequence according to the material processing direction, a raw material bin, a crusher, a crushing bin, a screening machine, a fine material temporary storage bin, a coarse material temporary storage bin, and a packaging machine. The packaging machine is located at the next station after the fine material temporary storage bin. The system also has multiple circulating bins, each of which is simultaneously connected to the crusher, the screening machine, and the coarse material temporary storage bin. A valve switch is installed on the connecting branch between the crushing bin and the screening machine, and a valve switch is also installed on the connecting branch of each circulating bin. Material that meets the crushing particle size requirements enters the fine material temporary storage bin from the screening machine.
[0006] This utility model discloses a circulating crushing and screening system, which has two circulating chambers, namely circulating chamber 1 and circulating chamber 2.
[0007] This utility model discloses a circulating crushing and screening system. The branches of the No. 1 and No. 2 circulating bins are respectively equipped with six valves, A, B, C, D, F and G. The branch connecting the crushing bin and the screening machine is equipped with valve E. Among them, valves A and B are set on the branch connecting the circulating bin and the crusher, valves C and D are set on the branch connecting the circulating bin and the screening machine, and valves F and G are set on the branch connecting the circulating bin and the coarse material storage bin.
[0008] This utility model discloses a circulating crushing and screening system, wherein the crushing particle size requirement is 200-800 mesh.
[0009] This utility model discloses a circulating crushing and screening system, wherein the crusher and screening machine can be a single device, multiple devices, or a combination of multiple devices.
[0010] Compared with the prior art, the present invention has the following advantages:
[0011] 1. This system is particularly suitable for processing materials with weak crushing and low screening efficiency. The processed materials have uniform particle size, narrow particle size range, and high qualified yield.
[0012] 2. This system is highly efficient and can be fully enclosed, making it particularly suitable for particle size processing of materials with high purity requirements, strict environmental requirements, and high variability.
[0013] 3. This system has a high degree of automation, which can reduce labor costs and has a higher fault tolerance rate.
[0014] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0015] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:
[0016] Figure 1 This is a flowchart illustrating the present invention. Detailed Implementation
[0017] The following description, with reference to the accompanying drawings, further details the specific implementation methods of this utility model, including the shape and structure of each component, the relative positions and connections between the parts, the function and working principle of each part, the manufacturing process, and the operation and use methods, so as to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the utility model concept and technical solution.
[0018] like Figure 1The illustrated circulating crushing and screening system includes, in sequence according to the material processing direction, a raw material silo, a crusher, a crushing silo, a screening machine, a fine material temporary storage silo, a coarse material temporary storage silo, and a packaging machine. The packaging machine is located at the next station after the fine material temporary storage silo. Material meeting the crushing particle size requirements enters the fine material temporary storage silo from the screening machine. The system has two circulating silos, namely Circulating Silo 1 and Circulating Silo 2. Six valves, A, B, C, D, F, and G, are respectively installed on the branches of Circulating Silo 1 and Circulating Silo 2. Valve E is installed on the branch connecting the crushing silo and the screening machine. Valves A and B are located on the branch connecting the circulating silo and the crusher, valves C and D are located on the branch connecting the circulating silo and the screening machine, and valves F and G are located on the branch connecting the circulating silo and the coarse material temporary storage silo. The required crushing particle size is 200–800 mesh. The crusher and screening machine can be a single unit, multiple units, or a combination of multiple units.
[0019] Working principle and method
[0020] (1) Valves A, E, and F open simultaneously, while B, C, D, and G close simultaneously; at this time, the crusher receives material from the original silo and the No. 2 circulating silo, the screening machine receives material from the crushing silo, consumes crushed material, and the coarse material temporary storage silo goes to the No. 1 circulating silo.
[0021] (2) Valves A and F remain open, B, C and G remain closed, D is open and E is closed at the same time; at this time, the crusher receives material from the original silo and the No. 2 circulating silo, the crushed material begins to accumulate in the crushing silo, the screening machine receives material from the No. 1 circulating silo, the coarse material temporary storage silo goes to the No. 1 circulating silo, and the circulating screening is performed until the material screening rate in the No. 1 circulating silo reaches the standard.
[0022] (3) Valves B, E, and G open simultaneously, while A, C, D, and F close simultaneously; at this time, the crusher receives material from the original silo and No. 1 circulating silo, the screening machine receives material from the crushing silo, consumes crushed material, and the coarse material temporary storage silo goes to No. 2 circulating silo.
[0023] (4) Valves B and G remain open, A, D and F remain closed, C is open and E is closed at the same time; at this time, the crusher receives material from the original silo and No. 1 circulating silo, the crushed material in the crushing silo begins to accumulate, the screening machine receives material from No. 2 circulating silo, the coarse material temporary storage silo goes to No. 2 circulating silo, and the circulating screening is performed until the material screening rate in No. 2 circulating silo reaches the standard.
[0024] (5) Start from step (1) again. This allows for uniform and continuous feeding and discharging of the material to be processed, resulting in more uniform product particle size;
[0025] Because this system can achieve processing with low crushing and low screening rates, the particle size range of materials can be controlled more narrowly, resulting in a higher qualified yield.
[0026] Example 1
[0027] The material to be processed is 2t / h; the crusher has a crushing capacity of 3.4t / h and a crushing rate of 60%; the screening machine has a screening capacity of 10t / h and a single screening undersize rate of 20%.
[0028] The conveying capacity is designed as follows: 2t / h from the raw material silo to the crusher, 1.4t / h from either the No. 1 or No. 2 circulating silo to the crusher, 10t / h from the crushed material silo or either the No. 1 or No. 2 circulating silo to the screening machine, and 8t / h from the coarse material temporary storage silo to either the No. 1 or No. 2 circulating silo.
[0029] The execution time of each step is designed as follows: (1):(2):(3):(4)=1:2:1:2.
[0030] Example 2:
[0031] The material to be processed is 10t / h, the crusher has a crushing capacity of 12.5t / h and a crushing rate of 80%; the screening machine has a screening capacity of 25t / h and a single screening rate of 40%.
[0032] The conveying capacity is designed as follows: 10t / h from the raw material silo to the crusher, 2.5t / h from either the No. 1 or No. 2 circulating silo to the crusher, 25t / h from the crushed material silo or either the No. 1 or No. 2 circulating silo to the screening machine, and 15t / h from the coarse material temporary storage silo to either the No. 1 or No. 2 circulating silo.
[0033] The execution time of each step is designed as follows: (1):(2):(3):(4)=1:1:1:1.
[0034] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.
Claims
1. A circulating crushing and screening system, comprising, in sequence according to the material processing direction, a raw material silo, a crusher, a crushing silo, a screening machine, a fine material temporary storage silo, a coarse material temporary storage silo, and a packaging machine, wherein the packaging machine is located at the next station after the fine material temporary storage silo, characterized in that, The system also has multiple circulation bins, each of which is connected to the crusher, the screening machine, and the coarse material storage bin. The connection between the crushing bin and the screening machine is equipped with a valve switch, and each circulation bin is also equipped with a valve switch. Material that meets the crushing particle size requirements enters the fine material storage bin from the screening machine.
2. The circulating crushing and screening system according to claim 1, characterized in that, The system has two circulation bins, namely circulation bin 1 and circulation bin 2.
3. The circulating crushing and screening system according to claim 2, characterized in that, The branch lines of the No. 1 and No. 2 circulation bins are respectively equipped with six valves: A, B, C, D, F, and G. The branch line connecting the crushing bin and the screening machine is equipped with valve E. Among them, valves A and B are installed on the branch line connecting the circulation bin and the crusher, valves C and D are installed on the branch line connecting the circulation bin and the screening machine, and valves F and G are installed on the branch line connecting the circulation bin and the coarse material storage bin.
4. The circulating crushing and screening system according to claim 1, characterized in that, The required particle size for crushing is 200–800 mesh.
5. A circulating crushing and screening system according to claim 1, characterized in that, The crusher and screening machine can be a single piece of equipment, multiple pieces of equipment, or a combination of multiple pieces of equipment.