Ball mill convenient for pre-drying fine iron powder
By using an electric heating element and a fan in conjunction with a water pump in the ball mill, the problems of uneven drying and low efficiency in the ball mill were solved, achieving uniform drying and efficient grinding of iron concentrate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-03-17
AI Technical Summary
Existing ball mills suffer from uneven drying quality and low efficiency when drying iron concentrate.
An electric heating element is used to heat the outside of the grinding barrel, and a fan is used to evenly distribute hot air inside the grinding barrel. At the same time, a fan and a water pump are used to add liquid during the grinding process, and the amount of liquid is controlled to improve dispersibility and particle fineness.
This method achieves uniform drying of iron concentrate, improves drying efficiency and grinding quality, reduces particle aggregation, and increases the particle size of iron concentrate.
Smart Images
Figure CN223996208U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of iron concentrate processing technology, specifically to a ball mill that facilitates the pre-drying of iron concentrate. Background Technology
[0002] Iron concentrate is the main raw material for iron ore pellets. It is a mineral powder produced by crushing, grinding, and beneficiation of iron ore. Fluctuations in the iron content directly affect the quality of the finished iron ore pellets. Iron ore is first subjected to preliminary crushing by crushing equipment, then fed evenly into grinding equipment by a feeder for grinding, and finally screened to remove impurities. The grinding stage is generally carried out using a ball mill.
[0003] Existing ball mills typically employ wet grinding when grinding iron ore. Adding water not only improves grinding efficiency but also enhances the operating environment. After grinding, the iron concentrate needs to be dried to remove moisture and ensure the quality of subsequent processing. Current equipment generally incorporates heating plates for drying the iron concentrate. However, drying solely through heating plates can lead to uneven drying, with the iron concentrate closer to the heat source drying faster than that further away, resulting in inconsistent drying quality and low drying efficiency. Utility Model Content
[0004] (I) Technical problems to be solved
[0005] The technical problem to be solved by this invention is to overcome the defects of uneven drying quality and low drying efficiency of the above-mentioned devices, and to provide a ball mill that facilitates the pre-drying of iron concentrate.
[0006] (II) Technical Solution
[0007] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a ball mill for pre-drying iron concentrate, comprising a support base, a protective cover fixedly mounted on the support base, a grinding barrel connected inside the protective cover, the grinding barrel being rotatably mounted inside the protective cover, a plurality of electric heating tubes arrayed inside the protective cover, the electric heating tubes being sleeved on the outside of the grinding barrel, a power component for driving the grinding barrel to rotate being provided on the side away from the opening of the grinding barrel, the power component being connected to the rotating shaft of the grinding barrel, a wind box being provided on one side of the grinding barrel, a fan being provided inside the wind box, a guide pipe being connected to the top of the wind box, a through hole being provided at the center of the rotating shaft of the grinding barrel, the guide pipe being connected to the through hole through a rotary joint, and a water supply component being provided on the side near the opening of the grinding barrel.
[0008] As an improvement: the power component includes a motor, the output end of which is connected to a drive pulley, and the grinding barrel shaft is provided with a driven pulley. The drive pulley and the driven pulley are connected by a synchronous belt.
[0009] As an improvement: a cover plate is provided at the opening of the grinding barrel by means of bolts and nuts, and a sealing ring is fitted on the cover plate at the position where it connects with the opening of the grinding barrel. A through hole is provided in the center of the cover plate.
[0010] As an improvement: the cover plate has several heat dissipation holes arranged in a circular array of through holes, and a dustproof mesh is bolted to the cover plate.
[0011] As an improvement: the water filling assembly includes a water tank, the water tank is equipped with a water pump, the water pump is connected to a water suction pipe and a water delivery pipe respectively, the water suction pipe is connected to the bottom of the water tank, and the water delivery pipe is inserted into the through hole.
[0012] As an improvement: the protective cover is provided with a support ring that rotates via a connecting rod. The support ring is sleeved on the water supply pipe, and the diameter of the through hole is larger than the diameter of the water supply pipe.
[0013] As an improvement: an observation window is provided on one side of the water tank, and a capacity scale is provided on the outer wall of the water tank on the side of the observation window.
[0014] (III) Beneficial Effects
[0015] The advantages of this utility model compared with the prior art are as follows:
[0016] 1. The air inside the grinding barrel is heated by an electric heating tube fitted on the outside of the grinding barrel. At the same time, the fan is responsible for drawing in the air and pushing the hot air through the electric heating tube, so that the hot air is evenly distributed inside the grinding barrel. As the grinding barrel rotates, the hot air comes into full contact with the grinding material, thereby improving drying efficiency and ensuring uniform drying quality.
[0017] 2. The water pump is set up to draw liquid from the water tank at a constant speed and deliver it to the grinding barrel during the grinding operation. At the same time, the volume of liquid can be controlled by the capacity scale. The addition of liquid can improve the dispersibility of the ore, reduce the aggregation between particles, help achieve a finer particle size, and improve the grinding quality of iron concentrate. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of a ball mill that facilitates the pre-drying of iron concentrate according to this utility model.
[0019] Figure 2 yes Figure 1 A magnified structural diagram of part A in the image.
[0020] Figure 3 yes Figure 1 A schematic diagram of the left rear side view structure.
[0021] Figure 4 yes Figure 1 A schematic diagram of the front partial cross-sectional structure.
[0022] Figure 5 yes Figure 1 A schematic diagram of the cover plate structure.
[0023] [Explanation of Labels in the Attached Image]
[0024] 1. Support base; 2. Protective cover; 3. Grinding barrel; 4. Electric heating element; 5. Air box; 6. Fan; 7. Air duct; 8. Motor; 9. Driving pulley; 10. Driven pulley; 11. Synchronous belt; 12. Cover plate; 13. Sealing ring; 14. Through hole; 15. Water tank; 16. Water pump; 17. Pumping pipe; 18. Water supply pipe; 19. Support ring; 20. Observation window; 21. Capacity scale; 22. Heat dissipation hole; 23. Dustproof net. Detailed Implementation
[0025] The present invention will now be described in further detail with reference to the accompanying drawings. Identical components are indicated by the same reference numerals.
[0026] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.
[0027] To make the content of this utility model easier to understand, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.
[0028] Example 1
[0029] Combined with appendix Figure 1 , Figure 3 and Figure 4 As shown, a ball mill for pre-drying iron concentrate includes a support base 1, on which a protective cover 2 is fixedly mounted. A grinding barrel 3 is connected inside the protective cover 2 and is rotatably mounted inside the protective cover 2. Multiple electric heating tubes 4 are arranged in an array inside the protective cover 2 and are sleeved on the outside of the grinding barrel 3. The protective cover 2 prevents the electric heating tubes 4 from being exposed to the air, thus improving the safety of the device. A wind box 5 is provided on one side of the grinding barrel 3, and a fan 6 is provided inside the wind box 5. An air guide pipe 7 is connected to the top of the wind box 5. A through hole is provided at the center of the rotating shaft of the grinding barrel 3, and the air guide pipe 7 is connected to the through hole through a rotary joint.
[0030] To prevent material from splashing out during the grinding process, combined with the attached Figure 1 , Figure 5As shown, a cover plate 12 is connected to the opening of the grinding barrel 3 by bolts and nuts. A sealing ring 13 is fitted on the cover plate 12 at the position where it connects with the opening of the grinding barrel 3. A through hole 14 is opened in the center of the cover plate 12. Several heat dissipation holes 22 are arranged around the through hole 14 on the cover plate 12. A dustproof net 23 is connected to the cover plate 12 by bolts. The cover plate 12 seals the grinding barrel 3, effectively preventing material leakage. At the same time, the design of the heat dissipation holes 22 can prevent the air pressure inside the grinding barrel 3 from being too high, which could cause safety hazards. The dustproof net 23 can prevent iron concentrate dust from overflowing from the grinding barrel 3 during the drying process.
[0031] Combined with appendix Figure 3 and Figure 4 As shown, a power assembly for driving the grinding barrel 3 to rotate is located on the side away from the opening of the grinding barrel 3. The power assembly is connected to the rotating shaft of the grinding barrel 3. The power assembly includes a motor 8, and a drive pulley 9 is connected to the output end of the motor 8. A driven pulley 10 is provided on the rotating shaft of the grinding barrel 3. The drive pulley 9 and the driven pulley 10 are connected by a synchronous belt 11. Through the transmission of the synchronous belt 11, the grinding barrel 3 is driven by the motor 8 to rotate, thereby performing a grinding operation on the iron ore inside.
[0032] During processing, iron ore and grinding balls are placed inside the grinding barrel 3. The grinding barrel 3 is sealed with a cover plate 12. Driven by the power unit, the grinding barrel 3 rotates to grind the iron ore into iron concentrate. In the later stage of grinding, the electric heating tube 4 is activated to heat the barrel wall and the internal gas of the grinding barrel 3. The grinding barrel 3 is heated evenly during rotation. At the same time, the fan 6 distributes the hot air evenly inside the grinding barrel 3. The through hole 14 can exhaust the hot air to achieve heat circulation. During the drying process, the material tumbles and comes into full contact with the hot air, which improves the drying efficiency and quality.
[0033] Example 2
[0034] Based on Example 1, to improve grinding efficiency and reduce dust generation during the grinding process, the following structure is adopted, combined with the attached... Figures 1 to 3 As shown, a water supply assembly is located near the opening of the grinding barrel 3. This assembly includes a water tank 15, on which a water pump 16 is mounted. The water pump 16 is connected to a suction pipe 17 and a delivery pipe 18. The suction pipe 17 connects to the bottom of the water tank 15, and the delivery pipe 18 is inserted into the through hole 14. An observation window 20 is located on one side of the water tank 15, and a capacity scale 21 is located on the outer wall of the water tank 15 next to the observation window 20. During grinding, the water pump 16 pumps the liquid from the water tank 15 into the grinding barrel 3. The operator observes the capacity scale 21 and the water level to control the amount of water supplied. The addition of water reduces friction between materials, improving grinding quality. Furthermore, the water suppresses dust dispersion, reducing environmental pollution during use.
[0035] Among them, combined with the appendix Figure 1 As shown, the protective cover 2 is provided with a support ring 19 that rotates via a connecting rod. The inner diameter of the support ring 19 is the same as the outer diameter of the water pipe, and the diameter of the through hole 14 is larger than the diameter of the water pipe. The water supply pipe 18 is made of flexible hose and can move flexibly. The water supply pipe 18 is inserted into the support ring 19. The support ring 19 firmly fixes the water supply pipe 18 to the outside of the cover plate 12 to prevent the water pipe from being affected by the rotation of the cover plate 12, so as to ensure that the cover plate 12 rotates with the grinding barrel 3.
[0036] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A ball mill for facilitating pre-drying of iron concentrate powder, comprising a support base (1), a protective shell (2) fixed on the support base (1), and a grinding barrel (3) connected in the protective shell (2), characterized in that: the grinding barrel (3) is rotatably arranged in the protective shell (2), a plurality of electric heating pipes (4) are arranged in an array in the protective shell (2), the electric heating pipes (4) are sleeved on the outer side of the grinding barrel (3), a power assembly for driving the grinding barrel (3) to rotate is arranged on the side away from the opening of the grinding barrel (3), and the power assembly is connected with the rotating shaft of the grinding barrel (3); an air bellow (5) is arranged on one side of the grinding barrel (3), a fan (6) is arranged in the air bellow (5), a wind guide pipe (7) is connected to the top of the air bellow (5), a perforation is arranged in the center of the rotating shaft of the grinding barrel (3), the wind guide pipe (7) is connected to the perforation through a rotary joint, and a water adding assembly is arranged close to the opening side of the grinding barrel (3).
2. A ball mill for facilitating pre-drying of iron concentrate fines as claimed in claim 1 wherein: the power assembly comprises a motor (8), a driving pulley (9) is connected to the output end of the motor (8), a driven pulley (10) is arranged on the rotating shaft of the grinding barrel (3), and the driving pulley (9) and the driven pulley (10) are connected through a synchronous belt (11).
3. A ball mill for facilitating pre-drying of iron concentrate fines as claimed in claim 1 wherein: a cover plate (12) is connected to the opening of the grinding barrel (3) through cooperation of a bolt and a nut, a sealing ring (13) is sleeved on the cover plate (12) at the position corresponding to the opening of the grinding barrel (3), and a through hole (14) is arranged in the center of the cover plate (12).
4. A ball mill for facilitating pre-drying of iron concentrate fines as claimed in claim 3 wherein: a plurality of heat dissipation holes (22) are arranged in an array around the through hole (14) on the cover plate (12), and a dust screen (23) is connected to the cover plate (12) through a bolt.
5. A ball mill for facilitating pre-drying of iron concentrate fines as claimed in claim 3 wherein: the water adding assembly comprises a water tank (15), a water pump (16) is arranged on the water tank (15), a water suction pipe (17) and a water supply pipe (18) are respectively connected to the water pump (16), the water suction pipe (17) is connected to the bottom of the water tank (15), and the water supply pipe (18) is inserted into the through hole (14).
6. A ball mill for facilitating pre-drying of iron concentrate fines as claimed in claim 4 wherein: a support ring (19) is rotatably arranged on the protective shell (2) through a connecting rod, the support ring (19) is sleeved on the water supply pipe (18), and the diameter of the through hole (14) is greater than the diameter of the water supply pipe (18).
7. A ball mill for facilitating pre-drying of iron concentrate fines as claimed in claim 5 wherein: an observation window (20) is arranged on one side of the water tank (15), and a capacity scale (21) is arranged on the outer wall of the water tank (15) at the side of the observation window (20).