Ore drying and screening integrated machine

Abstract

The utility model belongs to ore processing field relates to a kind of ore drying and screening integrated machine, including dryer, the feeding end of dryer one end, the other end is discharge end, dryer includes cover, the rotary screen mesh of rotation being located in cover inside drum, and base and rotary drive device;Drum is supported on the base by the rotary drive device of bottom, rotary drive device and drum rolling contact, drive drum rotary screen mesh rotation;Cover is fixed on the base, and cover bottom is equipped with under-screen system;Under-screen system includes under-screen chute located below base and under-screen material output device being arranged in under-screen chute;The upside of feeding end is equipped with feeding port, side is equipped with air inlet, and discharge end is equipped with screen chute and air outlet on;Screen material of drum is collected by the screen chute, and under-screen material is collected by the under-screen chute. Compared with existing ore dryer, the utility model has screening function, effectively improves ore processing efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of ore processing technology, specifically relating to an integrated ore drying and screening machine, which is suitable for simultaneous drying and screening of high moisture content blocky ores. Background Technology

[0002] During ore processing, ores often contain high moisture content, especially in humid environments or those imported by sea, where the moisture content can reach 15% to 30%. High moisture content not only increases transport load and costs, but also negatively impacts subsequent processing steps such as crushing, grinding, and sorting. For example, high moisture content ores are prone to agglomeration in crushing equipment, leading to blockages and reduced crushing efficiency. Currently, the industry typically employs a two-step processing model for high-moisture-content ores: drying followed by screening. This involves first drying the ore in specialized drying equipment (such as a rotary dryer) until the moisture content reaches a preset level, then transferring the dried ore to screening equipment (such as a vibrating screen or drum screen) for grading. This two-step processing model has the following significant drawbacks: 1. High equipment investment costs: Drying equipment and screening equipment need to be purchased separately, and a transfer and transportation device to connect the two types of equipment is also required, which leads to a significant increase in the overall equipment investment. This is especially true for small and medium-sized ore processing enterprises, which face greater pressure in purchasing equipment.

[0003] 2. Low processing efficiency: The transfer of ore between drying and screening equipment requires additional time, and problems such as ore accumulation and blockage are prone to occur during the transfer process, which can lead to interruption of the overall processing flow and make it difficult to achieve continuous production.

[0004] 3. Large footprint: Drying equipment, screening equipment and transfer and transportation devices all require independent installation space, resulting in a large overall footprint of the equipment. For ore processing sites with limited space resources, it is difficult to lay out the equipment reasonably.

[0005] To address these issues, while some companies in the industry have attempted to improve existing equipment, most have only focused on simple equipment assembly, failing to fundamentally integrate drying and screening functions. Therefore, developing an ore processing equipment capable of simultaneous drying and screening with high efficiency and energy saving has become a pressing technical challenge in the ore processing field. Utility Model Content

[0006] In view of this, the purpose of this utility model is to solve the above problems. This utility model provides an integrated ore drying and screening machine.

[0007] To achieve the above objectives, this utility model provides the following technical solution: An integrated ore drying and screening machine includes a dryer with a feed end and a discharge end. The dryer includes an outer cover, a rotatable drum-shaped screen inside the outer cover, a base, and a rotary drive device. The drum-shaped screen is supported on the base by the rotary drive device at the bottom, and the rotary drive device rolls in contact with the drum-shaped screen, driving the drum-shaped screen to rotate. The outer cover is fixedly mounted on the base, and a screening system is provided at the bottom of the outer cover. The screening system includes a screening chute located below the base and a screening material output device disposed within the screening chute. The feed end has a feed inlet on its upper side and an air inlet on its side, while the discharge end has an over-screen chute and an air outlet. The over-screen material and under-screen material of the drum-shaped screen are collected through the over-screen chute.

[0008] Furthermore, the drum-shaped screen is a multi-layered screen arranged coaxially, and the diameter of the screen holes in each layer is different, with the screen hole diameter decreasing sequentially from the inside to the outside; the number of chutes on the screen is the same as the number of layers of the drum-shaped screen, and they correspond one-to-one.

[0009] Furthermore, the feed inlet is funnel-shaped and extends into the interior of the drum-shaped screen.

[0010] Furthermore, the screened material output device is a screw conveyor or a scraper conveyor.

[0011] Furthermore, the air inlet and outlet are connected to a hot air circulation system to provide circulating hot air.

[0012] Furthermore, the hot air circulation system includes a hot air generator, an induced draft fan, a hot air duct, and a dust removal device connected in series.

[0013] Furthermore, the rotary drive device includes a drive motor, a reduction mechanism, a connecting shaft, and a drive wheel. The drive motor is connected to the connecting shaft via the reduction mechanism, and the connecting shaft is rotatably mounted on the base. The drive wheel is fitted onto the connecting shaft and makes rolling contact with the drum-shaped screen.

[0014] Furthermore, the drive motor is equipped with a frequency converter to adjust the rotation speed of the drum-shaped screen.

[0015] Furthermore, the dryer also integrates a humidity sensor, which is linked with the frequency converter to automatically adjust the hot air temperature and the rotation speed of the drum-shaped screen according to the moisture content of the ore.

[0016] The beneficial effects of this utility model are as follows: 1. This utility model truly integrates drying and screening functions into one. After the ore enters the inside of the drum-shaped screen directly from the funnel-shaped feed inlet, the moisture evaporation and particle size classification are completed simultaneously during the rotation of the screen. No intermediate transportation equipment is required, which completely eliminates the belt conveyor, elevator or truck transfer links in the traditional "dry first, then screen" process. The processing flow is greatly simplified and the continuity and stability of production are significantly improved.

[0017] 2. This utility model requires only one piece of equipment to completely replace the original rotary dryer, screening machine and tens of meters of transfer system. The number of equipment purchased is reduced, the direct investment cost is reduced, and the floor space is greatly reduced.

[0018] 3. The drum-shaped screen can be flexibly set as a single-layer or multi-layer coaxial screen, and the same number of screen chutes are set at the discharge end to realize multi-level particle size classification such as coarse, medium and fine in one go.

[0019] 4. The rotary drive device adopts a reliable transmission form of drive motor + reduction mechanism + drive wheel, and is equipped with frequency converter. It can flexibly adjust the screen speed according to the ore particle size, moisture content and processing volume to further optimize the drying and screening effect; a humidity sensor can be selected to realize automatic feedback adjustment of moisture content and achieve intelligent constant humidity discharge.

[0020] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a front and side view of the integrated ore drying and screening machine of this utility model.

[0022] Figure 2 This is an internal sectional view of the ore drying and screening integrated machine of this utility model.

[0023] Figure 3 The right side view shows the integrated ore drying and screening machine of this utility model.

[0024] Figure 4 This is a perspective view of the integrated ore drying and screening machine of this utility model.

[0025] Attached reference numerals: 1-Feed inlet; 2-Air inlet; 3-Outer cover; 4-Rotary drive device; 5-Underscreen chute; 6-Base; 7-Screen; 8-Primary screen chute; 9-Secondary screen chute; 10-Air outlet. Detailed Implementation

[0026] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0028] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0029] Example 1 like Figures 1-4 The image shows an integrated ore drying and screening machine, comprising a dryer with a feed end at one end and a discharge end at the other. The dryer includes an outer cover 3, a drum-shaped screen 7 rotatably disposed within the outer cover 3, a base 6, and a rotary drive device 4.

[0030] The drum-shaped screen 7 is supported on the base 6 by the rotary drive device 4 at the bottom. The rotary drive device 4 rolls and contacts the outer wall of the drum-shaped screen 7 and drives it to rotate. The outer cover 3 is fixed on the base 6. The bottom of the outer cover 3 is provided with a screening system. The screening system includes a screening chute 5 located below the base 6 and a screening material output device set in the screening chute 5. The screening material output device can be a screw conveyor or a scraper conveyor.

[0031] A funnel-shaped feed inlet 1 is provided on the upper side of the feed end, extending into the interior of the drum-shaped screen 7; an air inlet 2 is provided on the side of the feed end; and a screen chute and an air outlet 10 are provided at the discharge end. The air inlet 2 and the air outlet 10 are connected to a hot air circulation system to provide circulating hot air. The hot air circulation system includes a hot air generator, an induced draft fan, a hot air duct, and a dust removal device connected in series.

[0032] In this embodiment, the drum-shaped screen 7 adopts a single-layer structure. Wet ore falls directly into the screen 7 from the feed inlet 1, and hot air enters the outer casing 3 from the air inlet 2, making full contact with the ore. The rotary drive device 4 drives the screen 7 to rotate at a low speed, causing the ore to be repeatedly lifted and scattered as the screen rotates, simultaneously completing drying and screening. Fine material meeting the particle size requirements passes through the screen holes and falls into the undersize chute 5 below the outer casing 3, and is continuously output by the undersize output device; coarse material rotates with the screen 7 to the discharge end and falls into the oversize chute 8 for discharge; exhaust gas carrying moisture and a small amount of dust is discharged from the air outlet 10 and then enters the dust removal device. The entire process achieves simultaneous drying and screening, eliminating the need for intermediate transportation.

[0033] Example 2 This embodiment is a further optimization based on embodiment 1. The difference is that the drum-shaped screen 7 is a double-layer screen arranged coaxially, with the inner screen having a larger aperture and the outer screen having a smaller aperture; the discharge end is provided with two-stage chute, namely the first-stage chute 8 and the second-stage chute 9. The first-stage chute 8 corresponds to the coarse material on the inner screen and the second-stage chute 9 corresponds to the medium-sized material on the outer screen.

[0034] During operation, wet ore enters the innermost screen through the feed inlet 1, where it rotates and tumbles, undergoing initial drying and screening. Coarse material with a particle size larger than the outer screen openings is discharged from the primary screen chute 8. Medium-sized material with a particle size between the inner and outer screen openings passes through the inner screen openings but is retained by the outer screen, and is finally discharged from the secondary screen chute 9. Fine powder passes through the double-layer screens and falls into the undersize chute 5, where it is output by the undersize output device. The rotary drive device 4 is equipped with a frequency converter, which can adjust the screen rotation speed according to the ore particle size distribution to optimize the multi-stage screening effect.

[0035] This embodiment completes the coarse, medium, and fine grading in one step, and is suitable for ore processing enterprises that need to produce products of multiple specifications.

[0036] Example 3 This embodiment, based on embodiment 2, further integrates a humidity sensor (not shown in the figure) into the dryer. The humidity sensor is located near the discharge end and is linked to the frequency converter of the rotary drive device 4. When the moisture content of the discharged ore is detected to be higher than the set value, the system automatically reduces the screen rotation speed, increases the residence time of the ore in the drum, and simultaneously links the hot air generator to increase the hot air temperature, thereby achieving automatic adjustment of the moisture content.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An integrated ore drying and screening machine, comprising a dryer, wherein one end of the dryer is a feeding end and the other end is a discharging end, characterized in that, The dryer includes an outer cover, a drum-shaped screen rotatably disposed within the outer cover, a base, and a rotary drive device. The drum-shaped screen is supported on the base by the rotary drive device at its bottom, and the rotary drive device rolls in contact with the drum-shaped screen, driving the drum-shaped screen to rotate. The outer cover is fixedly disposed on the base, and a screening system is provided at the bottom of the outer cover. The screening system includes a screening chute located below the base and a screening material output device disposed within the screening chute. The upper side of the feed end is provided with a feed inlet, and the side is provided with an air inlet. The discharge end is provided with an over-screen chute and an air outlet. The over-screen material of the drum-shaped screen is collected through the over-screen chute, and the under-screen material is collected through the under-screen chute.

2. The ore drying and screening integrated machine according to claim 1, characterized in that, The drum-shaped screen is a multi-layered screen arranged coaxially, and the diameter of the screen holes in each layer is different, decreasing from the inside to the outside; the number of chutes on the screen is the same as the number of layers of the drum-shaped screen, and they correspond one-to-one.

3. The ore drying and screening integrated machine according to claim 1, characterized in that, The feed inlet is funnel-shaped and extends into the interior of the drum-shaped screen.

4. The ore drying and screening integrated machine according to claim 1, characterized in that, The screened material output device is a screw conveyor or a submerged scraper conveyor.

5. The ore drying and screening integrated machine according to claim 1, characterized in that, The air inlet and outlet are connected to a hot air circulation system to provide circulating hot air.

6. The ore drying and screening integrated machine according to claim 5, characterized in that, The hot air circulation system includes a hot air generator, an induced draft fan, a hot air duct, and a dust removal device connected in series.

7. The ore drying and screening integrated machine according to claim 1, characterized in that, The rotary drive device includes a drive motor, a reduction mechanism, a connecting shaft, and a drive wheel. The drive motor is connected to the connecting shaft via the reduction mechanism, and the connecting shaft is rotatably mounted on the base. The drive wheel is fitted onto the connecting shaft and makes rolling contact with the drum-shaped screen.

8. The ore drying and screening integrated machine according to claim 7, characterized in that, The drive motor is equipped with a frequency converter to adjust the rotation speed of the drum-shaped screen.

9. The ore drying and screening integrated machine according to claim 8, characterized in that, The dryer also integrates a humidity sensor, which is linked to the frequency converter to automatically adjust the hot air temperature and the rotation speed of the drum-shaped screen according to the moisture content of the ore.

Images