An ultrafine powder production system and production process flow

Abstract

The application relates to the technical field of powder processing, and particularly discloses a superfine powder production system and a production process flow, which comprises a superfine powder microbead sorting system and a superfine grinding sorting system which are communicated, the superfine powder microbead sorting system comprises a raw material feeding device, a first-stage grading device, a second-stage grading device and a microbead powder sub-packaging device which are arranged in series, and the superfine grinding sorting system comprises a superfine grinding and batching device and a superfine grinding grading device which are arranged in series. The superfine powder microbead sorting system controls the selection of microbead products with different mesh numbers through two-stage sorting, and the microbead products can be used for grinding sorting or can be used as filling materials such as talc powder, silicon powder and heavy calcium carbonate in the coating industry. The superfine grinding sorting system sorts superfine grinding powder products with different mesh numbers after grinding by a superfine powder ball mill, the superfine powder has small particle size and wide distribution range, and superfine powder with different particle sizes can be used as building materials or as reinforcing materials to replace carbon black in the rubber industry and plastic products.

Description

Technical Field

[0001] This invention relates to the field of powder processing technology, and in particular to an ultrafine powder production system and production process. Background Technology

[0002] Fly ash is a finely dispersed solid waste, composed of aluminosilicates and containing elements such as iron and calcium. It mainly exists in the form of oxides and unburned carbon. Fly ash is characterized by its porosity, large specific surface area, and active groups such as SiO2 and Al2O3, making it a multifunctional powdery mineral resource with significant market value. Currently, fly ash, especially its fine powder, is obtained through sorting. Sorted fly ash can be used in various fields: it can be used to make fly ash blocks as filler in high-rise buildings, fly ash wall panels for interior walls, and load-bearing wall materials. It can also be used to make fly ash concrete and fly ash cement. However, existing fly ash processing systems have poor grading effects between coarse and fine fly ash, leading to resource waste and low sorting efficiency, hindering widespread adoption. Therefore, it is necessary to propose an improved ultrafine powder production system and process flow to fully realize the high added value of fly ash. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art and provide an ultrafine powder production system and production process.

[0004] The technical solution of this invention is: An ultrafine powder production system includes an ultrafine powder bead sorting system and an ultrafine grinding and sorting system, which are connected by pipelines. The ultrafine powder bead sorting system includes a raw material feeding device, a primary grading device, a secondary grading device, and a bead powder dispensing device, which are connected in series. The ultrafine grinding and sorting system includes an ultrafine grinding batching device and an ultrafine grinding grading device, which are connected in series.

[0005] Preferably, the raw material feeding device includes a raw material silo and a primary grading buffer silo arranged in series, with an inclined chute between the raw material silo and the primary grading buffer silo, and a rotor scale feeder installed at the bottom of the raw material silo.

[0006] Preferably, the primary grading device includes a primary vertical single rotor classifier and a primary coarse powder bin, which are connected in series.

[0007] Preferably, the secondary grading device includes a bag filter dust collector, a secondary vertical single-rotor classifier, and an ultrafine classification coarse powder bin, which are connected in series.

[0008] Preferably, the outlet ends of the primary powder coarse powder bin and the ultrafine powder coarse powder bin are connected to a second inclined chute, which is connected to the first inclined chute via a pipeline.

[0009] Preferably, the microsphere powder dispensing device includes a cyclone collector, a second bag dust collector, and an ultrafine powder silo. The cyclone collector, the second bag dust collector, and the ultrafine powder silo are connected in series. The cyclone collector is also equipped with a secondary fine powder silo. Both the ultrafine powder silo and the secondary fine powder silo are connected to the first ton bag packaging machine.

[0010] Preferably, the ultrafine grinding and batching device includes a slag feeder, a pre-grinding ball mill dust collector, a slag pre-grinding ball mill, and an ultrafine powder ball mill. The pre-grinding ball mill dust collector and the slag pre-grinding ball mill are connected in parallel and are connected in series with the slag feeder and the ultrafine powder ball mill, respectively. Two inclined troughs are connected in series on the ultrafine powder ball mill, and a mill tail dust collector is installed at the outlet end of the ultrafine powder ball mill.

[0011] Preferably, the ultrafine grinding and grading device includes an ultrafine powder classifier and a bag collector I connected in series. The mill tail dust collector is connected in series at the inlet end of the ultrafine powder classifier. The powder at the outlet end of the bag collector I is divided into two paths: one path is conveyed to the building material silo, and the other path is conveyed to the ultrafine grading buffer silo. The ultrafine grading buffer silo is equipped with a vertical multi-rotor ultrafine classifier, a bag collector II, and a product silo connected in series. The product silo is configured in two groups, and the two groups of product silos are connected in parallel to a ton bag packaging machine II.

[0012] Preferably, the vertical multi-rotor ultrafine classifier is connected to the ultrafine coarse powder bin via pipeline.

[0013] A process flow for producing ultrafine powder includes the following steps: S1, Ultrafine Powder Bead Sorting S1.1 The powder in the raw material warehouse is conveyed to the primary classification buffer silo via the inclined chute; S1.2 The powder in the primary grading buffer bin is sent to the primary vertical single rotor classifier for primary grading; S1.2.1 Powder with a particle size greater than 180 mesh is temporarily stored in the primary classifier coarse powder silo. S1.2.2 Powder with a particle size of less than 180 mesh is collected by a bag dust collector and then sent to a two-stage vertical single rotor classifier for secondary classification. S1.2.2.1 Powder with a particle size of 250-300 mesh is temporarily stored in the ultrafine grade coarse powder silo. S1.2.2.2 Powder with a particle size greater than 4000 mesh enters the cyclone collector, is classified by the cyclone collector, is collected by the second bag dust collector, and is transported to the ultrafine powder silo. S1.2.2.3 Microsphere powder with a particle size of 800-1400 mesh is conveyed to the secondary fine powder silo; S1.2.2.4 The powder in the ultrafine powder silo and the secondary fine powder silo is packaged into small bag finished products or ton bag finished products by the ton bag packaging machine; S1.2.3 The powder in the primary coarse powder bin and the ultrafine coarse powder bin is conveyed to the ultrafine ball mill via the inclined chute; S2, Ultrafine Grinding and Sorting S2.1, Ultrafine Grinding S2.1.1 After being metered, the lumpy raw materials are fed into the slag pre-grinding ball mill via the slag feeder for pre-grinding, and then conveyed to the ultrafine powder ball mill. S2.1.2 Powders that do not require pre-grinding are conveyed by a slag feeder to the dust collector of the pre-grinding ball mill and then sent to the ultrafine powder ball mill. S2.1.3 The coarse powder in the raw material warehouse is transferred to the ultrafine powder ball mill through the first inclined chute and then enters the ultrafine powder ball mill. The powder in the primary powder coarse powder bin and the ultrafine powder coarse powder bin both enter the ultrafine powder ball mill through the second inclined chute. S2.2, Ultrafine powder ultrafine grinding and classification S2.2.1 The material after being ground by the ultrafine powder ball mill is collected by the mill tail dust collector and then enters the ultrafine powder special classifier; S2.2.1.1 Powder with a particle size of less than 800 mesh shall be returned to the ultrafine ball mill; S2.2.1.2 Powder with a particle size greater than 800 mesh is collected by a bag collector and transported in two separate paths; S2.2.1.2.1 The powder collected by the bag collector is transported to the building material silo. S2.2.1.2.2 The powder collected by the bag collector is transported to the ultrafine grading buffer bin and then sent to the vertical multi-rotor ultrafine grading machine for grading; S2.2.1.2.2.1 Powder with a particle size of less than 600 mesh shall be returned to the ultrafine classification coarse powder silo. S2.2.1.2.2.2 Powder with a particle size greater than 1200 mesh is used to obtain ultrafine powder with different high mesh sizes by setting the parameters of the classifier. After being collected by the second bag collector, it enters the product silo and is packaged into small bags or ton bags of finished products by the second ton bag packaging machine.

[0014] The present invention, employing the above-described structure, has the following advantages: 1. The ultrafine powder microbead sorting system can control the selection of microbead products with different mesh sizes through a two-stage sorting device. The sorted coarse powder is transported to the ultrafine powder grinding and sorting system for grinding and sorting. The sorted fine powder is collected and packaged as finished products, which can be used as a substitute for fillers such as talc, silica powder and heavy calcium carbonate in the coating industry. 2. After the material is ground by the ultrafine powder ball mill, it is sorted by the ultrafine powder classifier to separate ultrafine powder products of different mesh sizes. The particles are small in size and have a wide distribution range. The ultrafine powders of different particle sizes are used as building materials or as reinforcing materials to replace carbon black in the rubber industry and plastic products. 3. It has broadened the application industries of fly ash, improved the reuse of fly ash, reduced energy consumption, and reduced environmental pollution caused by mining. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the process flow of the ultrafine powder microsphere sorting system of the present invention; Figure 2 This is a schematic diagram of the process flow of the ultrafine grinding and sorting system of the present invention.

[0016] In the diagram, 101 is the raw material warehouse; 102 is the rotor scale feeder; 103 is the inclined chute one; 104 is the primary classification buffer bin; 105 is the primary vertical single rotor classifier; 106 is the primary powder coarse powder bin; 107 is the baghouse dust collector one; 108 is the secondary vertical single rotor classifier; 109 is the ultrafine classification coarse powder bin; 110 is the inclined chute two; 111 is the cyclone collector; 112 is the baghouse dust collector two; 113 is the ultrafine powder bin; 114 is the secondary fine powder bin; 1 15. Ton bag packaging machine I; 201. Slag feeder; 202. Pre-grinding ball mill dust collector; 203. Slag pre-grinding ball mill; 204. Ultrafine powder ball mill; 205. Mill tail dust collector; 206. Ultrafine powder special classifier; 207. Bag collector I; 208. Building material silo; 209. Ultrafine classification buffer silo; 210. Vertical multi-rotor ultrafine classifier; 211. Bag collector II; 212. Product silo; 213. Ton bag packaging machine II. Detailed Implementation

[0017] To make the technical means, technical features, inventive purpose and technical effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0018] Example 1 like Figure 1 and Figure 2As shown, an ultrafine powder production system includes an ultrafine powder bead sorting system and an ultrafine grinding sorting system. The ultrafine powder bead sorting system and the ultrafine grinding sorting system are interconnected. After the raw material is sorted by the ultrafine powder bead sorting system, a portion of the sorted powder is transported to the ultrafine grinding sorting system to participate in ultrafine grinding sorting.

[0019] like Figure 1 As shown, the ultrafine powder microsphere sorting system includes a raw material feeding device, a primary grading device, a secondary grading device, and a microsphere powder dispensing device. The raw material feeding device, the primary grading device, the secondary grading device, and the microsphere powder dispensing device are connected in series. In this embodiment, the connection between the raw material feeding device, the primary grading device, the secondary grading device, and the microsphere powder dispensing device is achieved through an air conveying chute and / or a bucket elevator. The air conveying chute and the bucket elevator adopt existing technology, and their structure will not be described in detail in this embodiment. The raw material feeding device includes a raw material silo 101 and a primary grading buffer silo 104, which are connected in series. In this embodiment, the capacity of the raw material silo 101 is set to 1500m³. An air box (not shown in the figure) is installed in the raw material silo 101, which can activate the raw materials in the raw material silo 101 at any time. A rotor scale feeder 102 is installed at the bottom of the raw material silo 101 for weighing and measuring the raw materials. The raw material silo 101 and the primary grading buffer silo 104 are connected by a chute 103. After being measured by the rotor scale feeder 102, the raw materials in the raw material silo 101 are transported to the primary grading buffer silo 104 through the chute 103. The primary grading device includes a primary vertical single rotor classifier 105 and a primary coarse powder bin 106. The primary vertical single rotor classifier 105 and the primary coarse powder bin 106 are connected in series. The material in the primary grading buffer bin 104 is sent to the primary vertical single rotor classifier 105 for primary grading. The powder with a particle size greater than 180 mesh separated by the primary vertical single rotor classifier 105 is transported to the primary coarse powder bin. The secondary classification device includes a bag dust collector 107, a secondary vertical single rotor classifier 108, and an ultrafine classification coarse powder bin 109. The bag dust collector 107, the secondary vertical single rotor classifier 108, and the ultrafine classification coarse powder bin 109 are connected in series. The powder with a particle size of less than 180 mesh separated by the primary vertical single rotor classifier 105 is collected by the bag dust collector 107 and then transported to the secondary vertical single rotor classifier 108 for secondary classification. The powder with a particle size of 250-300 mesh from the secondary classification is transported to the ultrafine classification coarse powder bin 109. Other powders from the secondary classification enter the microsphere powder packaging device. The microsphere powder packaging device includes a cyclone collector 111, a bag dust collector 112, and an ultrafine powder silo 113. The cyclone collector 111, the bag dust collector 112, and the ultrafine powder silo 113 are connected in series. A secondary fine powder silo 114 is also connected to the cyclone collector 111. The secondary fine powder silo 114 and the ultrafine powder silo 113 are connected in parallel and are both connected to the ton bag packaging machine 115. The powder enters the cyclone collector 111 for further classification. Powder with a particle size greater than 4000 mesh is collected by the bag dust collector 112 and sent to the ultrafine powder silo 113. Powder with a particle size of 800-1400 mesh is sent to the secondary fine powder silo 114. The powder in the ultrafine powder silo 113 and the secondary fine powder silo 114 is packaged into small bags or ton bags by the ton bag packaging machine 115. The outlet ends of the primary coarse powder bin 106 and the ultrafine coarse powder bin 109 are connected to the inclined chute 110. The inclined chute 103 and the inclined chute 110 are connected by a pipeline. The coarse powder in the raw material bin 101 is transferred to the inclined chute 110 through the inclined chute 103. The powder with a particle size greater than 180 mesh in the primary coarse powder bin 106 and the powder with a particle size of 250-300 mesh in the ultrafine coarse powder bin 109 can be transferred to the ultrafine grinding and sorting system through the inclined chute 110 to participate in the ultrafine grinding and sorting.

[0020] like Figure 2 As shown, the ultrafine grinding and sorting system includes an ultrafine grinding and feeding device and an ultrafine grinding and grading device, which are connected in series. The ultrafine grinding and batching device includes a slag feeder 201, a pre-grinding ball mill dust collector 202, a slag pre-grinding ball mill 203, and an ultrafine powder ball mill 204. The pre-grinding ball mill dust collector 202 and the slag pre-grinding ball mill 203 are connected in parallel and then in series between the slag feeder 201 and the ultrafine powder ball mill 204. The inclined chute 110 is connected in series with the ultrafine powder ball mill 204. A mill tail dust collector 205 is connected to the outlet end of the ultrafine powder ball mill 204. The raw materials fed into the ultrafine powder ball mill 204 come from the following sources: 1. The lumpy raw material is fed into the feeder by the loader. After being weighed and measured by the belt scale of the feeder, it is fed into the slag pre-grinding ball mill 203 by the slag feeder 201 for pre-grinding. The pre-grinding powder enters the ultrafine powder ball mill 204. 2. The raw materials are fed into the feeder by the loader. The belt scale of the feeder weighs and measures the raw materials. After weighing, the powder that does not need to be pre-ground is sent to the dust collector 202 of the pre-grinding ball mill via the slag feeder 201 and can be directly sent to the ultrafine powder ball mill 204. 3. The coarse powder in the raw material warehouse 101 is transferred to the inclined chute 103 to the inclined chute 210, and then conveyed to the ultrafine powder ball mill 204 by the inclined chute 210. The powder is ultra-finely ground in an ultra-fine ball mill 204; The ultrafine grinding and grading device includes an ultrafine powder classifier 206 and a bag collector 207, which are connected in series. A mill tail dust collector 205 is connected in series at the inlet end of the ultrafine powder classifier 206. The material after being ground by the ultrafine powder ball mill 204 is collected by the mill tail dust collector 205 and then enters the ultrafine powder classifier 206 for sorting. Powder with a particle size of less than 800 mesh is returned to the ultrafine powder ball mill 204 for further grinding, while powder with a particle size of more than 800 mesh is collected by the bag collector 207 and then conveyed. According to production needs, the powder collected by the bag collector 207 is divided into two paths during conveying: one path is conveyed to the building material silo 208 and transported by tanker truck, and the other path is conveyed to the ultrafine grading buffer. The ultrafine grading buffer 209 is connected in series with a vertical multi-rotor ultrafine grader 210, a bag collector 211, and a product hopper 212. The vertical multi-rotor ultrafine grader 210 is connected to the ultrafine coarse powder hopper 109 through a pipeline. The powder in the ultrafine grading buffer 209 is sent to the vertical multi-rotor ultrafine grader 210 for grading. Powder with a particle size of less than 600 mesh is transported to the ultrafine coarse powder hopper 109. Powder with a particle size of more than 1200 mesh is collected by the bag collector 211 and enters the product hopper 212. There are two sets of product hoppers 212, which are distributed in parallel and are both connected to the ton bag packaging machine 213. The powder in the product hopper 212 can be packaged into small bags or ton bags by the ton bag packaging machine 213.

[0021] Example 2 A process flow for producing ultrafine powder includes the following steps: S1, Ultrafine Powder Bead Sorting S1.1 The powder in the raw material warehouse 101 is conveyed to the primary classification buffer warehouse 104 via the inclined chute 103. A rotor scale feeder 102 is provided at the outlet end of the raw material warehouse 101. After being metered by the rotor scale feeder 102, the powder is conveyed to the primary classification buffer warehouse 104. S1.2 The powder in the primary grading buffer bin 104 is sent to the primary vertical single rotor classifier 105 for primary grading. S1.2.1 Powder with a particle size greater than 180 mesh is temporarily stored in the primary coarse powder bin 106; S1.2.2 Powder with a particle size of less than 180 mesh is collected by bag dust collector 107 and sent to two-stage vertical single rotor classifier 108 for two-stage classification. In this embodiment, the two-stage classification is divided into three levels. S1.2.2.1 Powder with a particle size of 250-300 mesh is temporarily stored in the ultrafine classification coarse powder silo 109; S1.2.2.2 Powder with a particle size greater than 4000 mesh enters the cyclone collector 111. After being classified by the cyclone collector 111, it is collected by the bag dust collector 112 and transported to the ultrafine powder silo 113. The ultrafine powder silo 113 is connected to the ton bag packaging machine 115. S1.2.2.3 Microbead powder with a particle size of 800-1400 mesh is conveyed to the secondary fine powder silo 114, and the secondary fine powder silo 114 is connected to the ton bag packaging machine 115; S1.2.2.4 The powder in the ultrafine powder hopper 113 and the secondary fine powder hopper 114 is packaged into small bags or ton bags by the ton bag packaging machine 115. S1.2.3 The powder in the primary coarse powder bin 106 and the ultrafine coarse powder bin 109 can be conveyed to the ultrafine powder ball mill 204 via the inclined chute 103, and participate in ultrafine grinding and sorting in the ultrafine powder ball mill 204. S2, Ultrafine Grinding and Sorting S2.1, Ultrafine grinding ingredients: The powders used in ultrafine grinding come from multiple sources: S2.1.1. The lumpy raw material is fed into the slag pre-grinding ball mill 203 through the slag feeder 201 for pre-grinding. After pre-grinding, it is conveyed to the ultrafine powder ball mill 204. The lumpy raw material is transported by a loader and measured by a belt scale. S2.1.2 Powders that do not require pre-grinding are conveyed by slag feeder 201 to dust collector 202 of pre-grinding ball mill and then directly sent to ultrafine powder ball mill 204. S2.1.3 The coarse powder in the raw material warehouse 101 is transferred to the inclined chute 110 via the inclined chute 103 and then enters the ultrafine powder ball mill 204. The powder in the primary powder coarse powder bin 106 and the ultrafine classification coarse powder bin 109 both enter the ultrafine powder ball mill 204 via the inclined chute 110. S2.2, Ultrafine powder ultrafine grinding and classification S2.2.1. Powders transported by multiple routes are ground in the ultrafine powder ball mill 204. The material after grinding in the ultrafine powder ball mill 204 is collected by the mill tail dust collector 205 and then enters the ultrafine powder special classifier 206. S2.2.1.1 Powder with a particle size of less than 800 mesh is returned to the ultrafine ball mill 204 for further grinding to improve resource utilization. S2.2.1.2 Powder with a particle size greater than 800 mesh is collected by bag collector 207. According to production needs, the powder collected by bag collector 207 is transported in two ways. S2.2.1.2.1 The powder collected by the bag collector is transported to the building materials silo 208 and then transported by tanker truck; S2.2.1.2.2 The powder collected by the bag collector is transported to the ultrafine grading buffer 209 and then sent to the vertical multi-rotor ultrafine grading machine 210 for grading; S2.2.1.2.2.1 Powder with a particle size of less than 600 mesh shall be returned to the ultrafine classification coarse powder silo 109 for storage. S2.2.1.2.2.2 Powder with a particle size greater than 1200 mesh is obtained by setting the parameters of the classifier to obtain ultrafine powder with different high mesh sizes. After being collected by bag collector 211, it enters the product silo 212 and is packaged into small bag finished products or ton bag finished products by ton bag packaging machine 213.

[0022] During the process, a high-precision laser force analyzer is used, and on-site inspection is conducted throughout the entire process to ensure product quality.

[0023] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. All equivalent changes and modifications made in accordance with the scope of the claims of this invention should fall within the technical scope of this invention.

Claims

1. An ultrafine powder production system, characterized in that: The system includes an ultrafine powder microsphere sorting system and an ultrafine grinding sorting system, which are connected by a pipeline. The ultrafine powder microsphere sorting system includes a raw material feeding device, a primary grading device, a secondary grading device, and a microsphere powder dispensing device, which are arranged in series. The ultrafine grinding sorting system includes an ultrafine grinding batching device and an ultrafine grinding grading device, which are arranged in series. The primary grading device includes a primary vertical single rotor classifier (105) and a primary coarse powder bin (106), which are connected in series. The secondary classification device includes a bag dust collector (107), a secondary vertical single rotor classifier (108), and an ultrafine classification coarse powder bin (109), which are connected in series. The outlet ends of the primary powder coarse powder bin (106) and the ultrafine powder coarse powder bin (109) are connected to the second inclined chute (110), and the second inclined chute (110) is connected to the first inclined chute (103) through a pipeline; The microsphere powder dispensing device includes a cyclone collector (111), a second bag dust collector (112), and an ultrafine powder silo (113). The cyclone collector (111), the second bag dust collector (112), and the ultrafine powder silo (113) are connected in series. The cyclone collector (111) is also equipped with a secondary fine powder silo (114). Both the ultrafine powder silo (113) and the secondary fine powder silo (114) are connected to the first ton bag packaging machine (115). The ultrafine grinding and batching device includes a slag feeder (201), a pre-grinding ball mill dust collector (202), a slag pre-grinding ball mill (203), and an ultrafine powder ball mill (204). The pre-grinding ball mill dust collector (202) and the slag pre-grinding ball mill (203) are connected in parallel and are connected in series with the slag feeder (201) and the ultrafine powder ball mill (204) respectively. The second inclined trough (110) is connected in series on the ultrafine powder ball mill (204). A mill tail dust collector (205) is provided at the outlet end of the ultrafine powder ball mill (204). The ultrafine grinding and grading device includes an ultrafine powder classifier (206) and a bag collector (207) connected in series. The mill tail dust collector (205) is connected in series at the inlet end of the ultrafine powder classifier (206). The powder at the outlet end of the bag collector (207) is divided into two paths: one path is transported to the building material silo (208), and the other path is transported to the ultrafine grading buffer silo (209). The ultrafine grading buffer silo (209) is connected in series with a vertical multi-rotor ultrafine classifier (210), a bag collector (211), and a product silo (212). The product silo (212) is set in two groups, and the two groups of product silos (212) are connected in parallel with a ton bag packaging machine (213). The vertical multi-rotor ultrafine classifier (210) is connected to the ultrafine coarse powder bin (109) via a pipeline.

2. The ultrafine powder production system according to claim 1, characterized in that: The raw material feeding device includes a raw material silo (101) and a primary grade buffer silo (104) arranged in series. A chute (103) is provided between the raw material silo (101) and the primary grade buffer silo (104). A rotor scale feeder (102) is provided at the bottom of the raw material silo (101).

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