Blast furnace slag powder grinding and selecting device

Abstract

The utility model discloses a blast furnace slag powder grinding and selecting device, which belongs to the technical field of blast furnace slag processing and comprises a grinding mechanism connected with a powder selecting mechanism. The grinding mechanism comprises a powder feeding part, a grinding part and a separating part which are sequentially connected, a grinding shaft, a first screen and a second screen are arranged in the grinding part, the first screen and the second screen are both connected to the outer side of the grinding shaft in a sleeving mode, a plurality of first mesh holes are formed in the first screen, and a plurality of second mesh holes are formed in the second screen; the powder selecting mechanism comprises a coarse powder separating part and a fine powder separating part, the coarse powder separating part is connected to the bottom end of the fine powder separating part, a baffling cone is arranged in the coarse powder separating part, a rotating mechanism is arranged in the fine powder separating part, and a cyclone impeller is arranged in the rotating mechanism; guide vanes are arranged on the periphery of the slewing mechanism. The circular grinding and powder selecting device can circularly grind and select powder and realize efficient coarse and fine separation.

Description

Technical Field

[0001] This utility model belongs to the field of blast furnace slag processing technology, specifically relating to a blast furnace slag powder grinding and classifying device. Background Technology

[0002] Blast furnace slag powder is a byproduct of iron and steel smelting. It possesses excellent physical and chemical properties and is widely used in cement, concrete, and other fields. With increasingly stringent environmental regulations and growing awareness of resource recycling, the reprocessing and utilization of slag powder has become increasingly important.

[0003] Currently, most slag powder grinding and classifying equipment on the market uses traditional grinding and separation methods, which have several shortcomings. These include low grinding efficiency, high energy consumption, uneven fineness distribution, and poor environmental performance. Furthermore, existing equipment often struggles to achieve efficient separation of coarse and fine powders, increasing the complexity of subsequent processing and impacting the overall market competitiveness of slag powder. Therefore, developing a highly efficient, energy-saving, and environmentally friendly slag powder grinding and classifying device is of paramount importance.

[0004] The existing Chinese patent with publication number CN221046641U discloses an integrated air classifier for coarse powder separation and fine powder classification, including a coarse powder separation section and a fine powder classification section. The coarse powder separation section is located below the fine powder classification section. The coarse powder separation section has no power source and is equipped with an adjustable guide plate for preliminary sorting of coarse powder. The fine powder classification section is equipped with a rotating part inside, and stationary blades are provided on the periphery of the rotating part.

[0005] In summary, in the existing technology, the powder selection device and the grinding device are set up separately, which makes it impossible to circulate grinding and powder selection, and makes it impossible to separate coarse powder into fine powder sufficiently. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a blast furnace slag powder grinding and classifying device that can circulate grinding and classifying powder to achieve efficient coarse and fine separation.

[0007] The technical solution adopted by this utility model is a blast furnace slag powder grinding and classifying device, including a grinding mechanism and a classifying mechanism connected to the grinding mechanism;

[0008] The grinding mechanism includes a powder feeding section, a grinding section and a separation section connected in sequence. The grinding section is equipped with a grinding shaft, a first screen and a second screen. Both the first screen and the second screen are sleeved on the outside of the grinding shaft. The first screen has multiple first mesh holes and the second screen has multiple second mesh holes. The diameter of the first mesh holes is larger than the diameter of the second mesh holes.

[0009] The top of the separation section is connected to a powder outlet pipe, and the bottom of the separation section is connected to a discharge port.

[0010] The powder feeding section is connected to an air inlet pipe, and the top of the air inlet pipe is connected to the first feed port.

[0011] The powder separation mechanism includes a coarse powder separation section and a fine powder separation section. The coarse powder separation section is connected to the bottom of the fine powder separation section. A baffle cone is installed inside the coarse powder separation section, and a rotary mechanism is installed inside the fine powder separation section. A cyclone impeller is installed inside the rotary mechanism, and guide vanes are installed around the rotary mechanism.

[0012] The bottom of the coarse powder separation section is equipped with a powder inlet pipe and a powder return pipe, respectively.

[0013] The fine powder separation section is equipped with a third feed port at the top;

[0014] The return powder pipe is connected to the first feed port via a pipeline, the discharge powder pipe is connected to the feed powder pipe via a pipeline, and the discharge port is connected to the third feed port via a pipeline.

[0015] The present invention is further characterized in that,

[0016] The powder feeding section includes an inlet plate, one end of which is connected to the grinding section, and the other end of which is connected to the air inlet pipe. The air inlet pipe is connected to the grinding section, and a second feed port is provided inside the air inlet pipe.

[0017] The grinding section includes a cylinder, which is connected to an inlet plate and an air inlet pipe. A grinding shaft is located at the center inside the cylinder. One end of the grinding shaft is inserted into the inlet plate, and a first drive motor is connected to the end of the grinding shaft inserted into the inlet plate. The other end of the grinding shaft is inserted into a separation section. A first screen is fitted around the center of the grinding shaft, and the edge of the first screen is connected to the inner wall of the cylinder.

[0018] The separation section includes a discharge box, a cylinder connected to the discharge box, a second screen at the connection between the cylinder and the discharge box, a grinding shaft inserted into the second screen, a dividing component and grinding beads on the grinding shaft, the dividing component being located between the inlet plate and the first screen, the grinding beads being located between the first screen and the second screen, a powder outlet pipe connected to the top of the discharge box, a support connected to the bottom of the discharge box, a discharge port opened on the support, and the discharge port being connected to the discharge box.

[0019] The coarse powder separation section includes an air chamber, with a powder inlet pipe connected to one side of the air chamber. A lower shell is inserted into the top of the air chamber, and a coarse powder collection shell is installed inside the lower shell. A baffle cone is connected to the bottom of the coarse powder collection shell, which is connected to an upper shell. A return powder pipe is connected to one side of the bottom of the lower shell. The return powder pipe and the powder inlet pipe are located on different sides. A coarse powder separation pipe is connected to one side of the bottom of the coarse powder collection shell. The coarse powder separation pipe and the return powder pipe are located on the same side.

[0020] The fine powder separation section includes an upper shell, which is connected to the top of the lower shell. The top of the upper shell is connected to an air outlet, a third inlet, and a shaft housing. A second drive motor is installed at the top of the shaft housing.

[0021] The beneficial effects of this utility model are:

[0022] This utility model discloses a blast furnace slag powder grinding and classifying device. Through the design of the grinding mechanism, combined with the cooperation of the grinding shaft and multi-stage screens, it can efficiently refine slag powder and significantly improve grinding efficiency. The separation mechanism includes a dual design of coarse powder separation and fine powder separation, which can achieve efficient separation of slag powder with different particle sizes, ensuring that the fineness of the final product is uniform and reasonably distributed to meet different market demands. The device has a reasonable design for the connection between the air inlet pipe and the powder inlet section, optimizes the airflow path, reduces energy loss, and adopts a mechanized separation method to reduce dependence on chemical additives and reduce environmental pollution. The grinding mechanism and the separation mechanism are connected by a circulation pipeline, which allows the slag powder to be circulated for grinding and classification, achieving efficient coarse and fine separation. Attached Figure Description

[0023] Figure 1 This is an overall structural diagram of a blast furnace slag powder grinding and classifying device according to this utility model;

[0024] Figure 2 This is a structural diagram of the grinding mechanism in this utility model;

[0025] Figure 3 This is a structural diagram of the separation mechanism in this utility model;

[0026] Figure 4 This is a structural diagram of the cyclone impeller in this utility model.

[0027] In the figure, 1. Grinding mechanism, 101. Inlet plate, 102. Cylinder, 1021. First screen, 1022. Second screen, 1023. First mesh size, 1024. Second mesh size, 103. Discharge box, 104. Powder outlet pipe, 105. Support, 106. Discharge port, 107. Grinding shaft, 1071. Dividing component, 1072. Grinding beads, 108. First drive motor, 109. Air inlet pipe, 1091. First feed inlet. 1092. Second feed inlet, 2. Powder classifier, 201. Air chamber, 202. Lower shell, 2021. Baffle cone, 2022. Powder inlet pipe, 203. Upper shell, 2031. Rotary mechanism, 2032. Cyclone impeller, 2033. Guide vane, 204. Air outlet, 205. Third feed inlet, 206. Shaft shell, 207. Second drive motor, 208. Powder return pipe, 209. Coarse powder collection shell, 210. Coarse powder separation pipe. Detailed Implementation

[0028] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. Example 1:

[0029] like Figure 1-4 As shown, the present invention discloses a blast furnace slag powder grinding and classifying device, which includes a grinding mechanism 1 and a classifying mechanism 2 connected to the grinding mechanism 1.

[0030] The grinding mechanism 1 includes a powder feeding section, a grinding section, and a separation section connected in sequence. The grinding section is provided with a grinding shaft 107, a first screen 1021, and a second screen 1022. The first screen 1021 and the second screen 1022 are both sleeved on the outside of the grinding shaft 107. The first screen 1021 has a plurality of first mesh holes 1023, and the second screen 1022 has a plurality of second mesh holes 1024. The diameter of the first mesh holes 1023 is larger than the diameter of the second mesh holes 1024, which is used for finer grinding of blast furnace slag powder.

[0031] The top of the separation section is connected to a powder outlet pipe 104, and the bottom of the separation section is connected to a discharge port 106.

[0032] The powder feeding section is connected to an air inlet pipe 109, and the top end of the air inlet pipe 109 is connected to a first feed inlet 1091;

[0033] The powder separation mechanism 2 includes a coarse powder separation section and a fine powder separation section. The coarse powder separation section is connected to the bottom of the fine powder separation section. A baffle cone 2021 is provided inside the coarse powder separation section, and a rotary mechanism 2031 is provided inside the fine powder separation section. A cyclone impeller 2032 is provided inside the rotary mechanism 2031, and guide vanes 2033 are provided around the rotary mechanism 2031. By adjusting the angle of the guide vanes 2033 and the rotation speed of the rotary mechanism 2031, the medium and coarse powders of the material can be separated.

[0034] The bottom end of the coarse powder separation section is respectively provided with a powder inlet pipe 2022 and a powder return pipe 208;

[0035] The fine powder separation section is provided with a third inlet 205 at its top;

[0036] The powder return pipe 208 is connected to the first feed inlet 1091 via a pipe, the powder outlet pipe 104 is connected to the powder inlet pipe 2022 via a pipe, and the discharge port 106 is connected to the third feed inlet 205 via a pipe.

[0037] The powder feeding section includes an inlet plate 101, one end of which is connected to a grinding section, and the other end of which is connected to an air inlet pipe 109. The air inlet pipe 109 is connected to the grinding section, and a second feed port 1092 is provided inside the air inlet pipe 109.

[0038] The grinding section includes a cylinder 102, which is connected to the inlet plate 101 and communicates with the air inlet pipe 109. The grinding shaft 107 is located at the center inside the cylinder 102. One end of the grinding shaft 107 is inserted into the inlet plate 101, and a first drive motor 108 is connected to the end of the grinding shaft 107 inserted into the inlet plate 101. The other end of the grinding shaft 107 is inserted into the separation section. A first screen 1021 is sleeved at the center of the grinding shaft 107, and the edge of the first screen 1021 is connected to the inner wall of the cylinder 102.

[0039] The separation section includes a discharge box 103, with the cylinder 102 connected to it. The connection between the cylinder 102 and the discharge box 103 is a second screen 1022. A grinding shaft 107 is inserted into the second screen 1022. A dividing component 1071 and grinding beads 1072 are provided on the grinding shaft 107. The dividing component 1071 is located between the inlet plate 101 and the first screen 1021 for the first grinding of the material. The grinding beads 1072 are located between the first screen 1021 and the second screen 1022 for the second grinding of the material. A powder outlet pipe 104 is connected to the top of the discharge box 103, and a support 105 is connected to the bottom of the discharge box 103. The support 105 has a discharge port 106, which is connected to the discharge box 103. The ground material enters the discharge box 103 through the second screen 1022 and falls into the discharge port 106.

[0040] The coarse powder separation section includes an air chamber 201, with a powder inlet pipe 2022 connected to one side of the air chamber 201. A lower housing 202 is inserted into the top of the air chamber 201, and a coarse powder collection shell 209 is disposed inside the lower housing 202. A baffle cone 2021 is connected to the bottom end of the coarse powder collection shell 209, and an upper housing 203 is connected to the coarse powder collection shell 209. A return powder pipe 208 is connected to one side of the bottom end of the lower housing 202. The return powder pipe 208 and the powder inlet pipe 2022 are located on different sides. A coarse powder separation pipe 210 is connected to one side of the bottom end of the coarse powder collection shell 209, and the coarse powder separation pipe 210 and the return powder pipe 208 are located on the same side.

[0041] The fine powder separation section includes an upper shell 203, which is connected to the top of the lower shell 202. The top of the upper shell 203 is connected to an air outlet 204, a third inlet 205, and a shaft shell 206. A second drive motor 207 is provided at the top of the shaft shell 206 to drive the operation of the rotary mechanism 2031 and control the speed of the rotary mechanism 2031 and the cyclone impeller 2032 to screen coarse and fine powders.

[0042] Working principle: Blast furnace slag powder is placed into the cylinder 102 through the second feed port 1092. Airflow is introduced from the air inlet pipe 109, and the first drive motor 108 is started at the same time. The dividing component 1071 on the grinding shaft 107 performs the first grinding of the blast furnace slag powder. The blast furnace slag powder particles after the first grinding pass through the first screen and are finally ground a second time through the grinding beads 1072 set on the grinding shaft 107. Then, they pass through the second screen 1022 and enter the unloading box 103. On the one hand, the airflow carrying blast furnace slag powder enters the air chamber 201 through the powder outlet pipe 104 and the powder inlet pipe 2022. The airflow carrying blast furnace slag powder impacts the baffle cone 2021. Through the side wall effect, some coarse powder enters the return powder pipe 208 and then exits through the first feed port 109. 091 enters the cylinder 102 for further grinding. The remaining blast furnace slag powder enters the upper shell 203, where the guide vanes 2033 and the rotary mechanism 2031 work together to separate coarse and fine powder. The coarse powder falls into the coarse powder collection shell 209 and enters the return powder pipe 208 through the coarse powder separation pipe 210. The fine powder enters the exhaust duct 204 and is collected. On the other hand, the blast furnace slag powder that has finished grinding enters the upper shell 203 through the discharge port 106 and the third inlet 205. The upper shell 203 separates the coarse and fine powder through the rotary mechanism 2031, the guide vanes 2033 and the cyclone impeller 2032. The coarse powder enters the coarse powder collection shell 209 and the fine powder enters the exhaust duct 204. The rotary mechanism 2031 is controlled by the second drive motor 207.

Claims

1. A grinding and classifying device for blast furnace slag powder, characterized in that, It includes a grinding mechanism (1), which is connected to a powder selection mechanism (2); The grinding mechanism (1) includes a powder feeding part, a grinding part and a separation part connected in sequence. The grinding part is provided with a grinding shaft (107), a first screen (1021) and a second screen (1022). The first screen (1021) and the second screen (1022) are both sleeved on the outside of the grinding shaft (107). The first screen (1021) has a plurality of first mesh holes (1023) and the second screen (1022) has a plurality of second mesh holes (1024). The diameter of the first mesh hole (1023) is larger than the diameter of the second mesh hole (1024). The top of the separation section is connected to a powder outlet pipe (104), and the bottom of the separation section is connected to a discharge port (106). The powder feeding section is connected to an air inlet pipe (109), and the top end of the air inlet pipe (109) is connected to a first feed inlet (1091). The powder separation mechanism (2) includes a coarse powder separation section and a fine powder separation section. The coarse powder separation section is connected to the bottom end of the fine powder separation section. A baffle cone (2021) is provided inside the coarse powder separation section. A rotary mechanism (2031) is provided inside the fine powder separation section. A cyclone impeller (2032) is provided inside the rotary mechanism (2031). Guide vanes (2033) are provided around the rotary mechanism (2031). The bottom end of the coarse powder separation section is respectively provided with a powder inlet pipe (2022) and a powder return pipe (208). The fine powder separation section is provided with a third inlet (205) at the top. The return powder pipe (208) is connected to the first feed inlet (1091) via a pipe, the discharge powder pipe (104) is connected to the feed powder pipe (2022) via a pipe, and the discharge port (106) is connected to the third feed inlet (205) via a pipe.

2. The blast furnace slag powder grinding and classifying device according to claim 1, characterized in that, The powder feeding section includes an inlet plate (101), one end of which is connected to a grinding section, and the other end of which is connected to an air inlet pipe (109). The air inlet pipe (109) is connected to the grinding section, and a second feed port (1092) is provided inside the air inlet pipe (109).

3. The blast furnace slag powder grinding and classifying device according to claim 2, characterized in that, The grinding section includes a cylinder (102), which is connected to the inlet plate (101) and communicates with the air inlet pipe (109). The grinding shaft (107) is located at the center inside the cylinder (102). One end of the grinding shaft (107) is inserted into the inlet plate (101), and a first drive motor (108) is connected to the end of the grinding shaft (107) inserted into the inlet plate (101). The other end of the grinding shaft (107) is inserted into the separation section. The first screen (1021) is sleeved at the center of the grinding shaft (107), and the edge of the first screen (1021) is connected to the inner wall of the cylinder (102).

4. The blast furnace slag powder grinding and classifying device according to claim 3, characterized in that, The separation section includes a discharge box (103), the cylinder (102) is connected to the discharge box (103), the connection between the cylinder (102) and the discharge box (103) is the second screen (1022), the grinding shaft (107) is inserted into the second screen (1022), and the grinding shaft (107) is provided with a dividing component (1071) and grinding beads (1072). The dividing component (1071) is positioned... Between the inlet plate (101) and the first screen (1021), the grinding beads (1072) are located between the first screen (1021) and the second screen (1022). The top of the unloading box (103) is connected to the powder outlet pipe (104), and the bottom of the unloading box (103) is connected to the support (105). The support (105) has an unloading port (106), and the unloading port (106) is connected to the unloading box (103).

5. The blast furnace slag powder grinding and classifying device according to claim 4, characterized in that, The coarse powder separation section includes a blower (201), one side of which is connected to a powder inlet pipe (2022). A lower housing (202) is inserted into the top of the blower (201). A coarse powder collection shell (209) is provided inside the lower housing (202). A baffle cone (2021) is connected to the bottom of the coarse powder collection shell (209). An upper housing (203) is connected to the coarse powder collection shell (209). A return powder pipe (208) is connected to one side of the bottom of the lower housing (202). The return powder pipe (208) and the powder inlet pipe (2022) are located on different sides. A coarse powder separation pipe (210) is connected to one side of the bottom of the coarse powder collection shell (209). The coarse powder separation pipe (210) and the return powder pipe (208) are located on the same side.

6. The blast furnace slag powder grinding and classifying device according to claim 5, characterized in that, The fine powder separation section includes an upper shell (203), which is connected to the top of the lower shell (202). The top of the upper shell (203) is connected to an air outlet (204), a third inlet (205), and a shaft shell (206). The top of the shaft shell (206) is provided with a second drive motor (207).

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