Double flash copper smelting intermediate material handling system and process

Abstract

The application provides a double-flash copper smelting intermediate material processing system and process, which comprises a coarse crushing device for coarsely crushing the intermediate material generated by double-flash copper smelting and a fine crushing device for finely crushing the coarsely crushed intermediate material, the fine crushing device is connected with the discharge end of the coarse crushing device, and the intermediate material processing system further comprises at least two transmission devices, the two transmission devices are connected with each other, and the two transmission devices are respectively connected with the discharge end of the fine crushing device and the settling tank of a flash smelting furnace. The coarse crushing device and the fine crushing device are combined, the step of grinding the intermediate material in the prior art is reduced under the premise of reducing the equipment cost and the maintenance cost, and the cost of the overall process is further reduced.

Description

Technical Field

[0001] This invention relates to the field of copper smelting material processing technology, and particularly to an intermediate material processing system and process for double flash copper smelting. Background Technology

[0002] Currently, in domestic copper smelters using the double flash process, the method for processing intermediate materials is generally to use crushing and fine grinding. The intermediate materials need to be ground until the particle size is below 1mm or even -200 mesh before being pneumatically conveyed to the concentrate silo or batching workshop. After being mixed with copper concentrate, the mixture is added to the flash furnace reaction tower through the concentrate nozzle.

[0003] The above method is the conventional approach for adding materials to a flash furnace. For intermediate materials of varying sizes, the process is cumbersome, involves many pieces of equipment, requires a large area, and involves high investment. Furthermore, the fine grinding equipment experiences significant wear and requires frequent maintenance, and the pneumatic conveying process consumes a large amount of compressed air, all of which increase production costs. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide an intermediate material processing system and process for double flash copper smelting, so as to at least solve the shortcomings of the above-mentioned technology.

[0005] This invention proposes an intermediate material handling system for double flash copper smelting, comprising:

[0006] The system includes a coarse crushing device for coarsely crushing intermediate materials produced by double flash copper smelting and a fine crushing device for finely crushing the intermediate materials after coarse crushing. The fine crushing device is connected to the discharge end of the coarse crushing device. The intermediate material processing system also includes at least two conveying devices that are interconnected. The two conveying devices are respectively connected to the discharge end of the fine crushing device and the sedimentation tank of the flash smelting furnace.

[0007] Furthermore, the coarse crushing equipment includes a jaw crusher for crushing the intermediate material to a first particle size value, and the fine crushing equipment includes a cone crusher for crushing the intermediate material after coarse crushing to a second particle size value. The discharge end of the jaw crusher is connected to the feed end of the cone crusher, and the second particle size value is smaller than the first particle size value.

[0008] Furthermore, a large-angle conveying device is provided between the jaw crusher and the cone crusher. One end of the large-angle conveying device is located directly below the discharge end of the jaw crusher, and the other end is located directly above the feed end of the cone crusher.

[0009] Furthermore, the at least two conveying devices include a vertical conveying device for vertically conveying materials and a feeding conveying device connected to the discharge end of the vertical conveying device, wherein the feeding conveying device is connected to the settling tank of the flash melting furnace.

[0010] Furthermore, the coarse crushing equipment is provided with a feeding hopper at the feed end, and the feeding and conveying equipment includes a pool top hopper and a feeder, with the feed end of the pool top hopper connected to the discharge end of the vertical conveying equipment.

[0011] Furthermore, both the feeding hopper and the top hopper are equipped with weighing devices, and the feeder is equipped with a variable frequency speed control device. The weighing devices and the feeder are interlocked in speed.

[0012] This invention also proposes an intermediate material processing technology for double flash copper smelting, using the aforementioned intermediate material processing system, comprising the following steps:

[0013] The intermediate materials produced by double flash copper smelting are coarsely crushed using coarse crushing equipment so that the particle size of the intermediate materials is crushed to the first particle size value.

[0014] The intermediate material after coarse crushing is further crushed by fine crushing equipment so that the particle size of the intermediate material is crushed to a second particle size value, which is smaller than the first particle size value.

[0015] The finely crushed intermediate material is vertically transported to another conveying device using any one of the conveying devices, so that the intermediate material is transported to the settling tank of the flash smelting furnace;

[0016] The finely crushed intermediate material is melted at high temperature in the settling tank of the flash smelting furnace. The copper-containing material in the finely crushed intermediate material is then fed into copper matte, and the remaining other materials are fed into slag to complete the recycling process.

[0017] Furthermore, the first particle size value ranges from 50mm to 100mm, and the second particle size value ranges from 5mm to 20mm.

[0018] The intermediate material processing system and process for double flash copper smelting in this invention combines coarse crushing and fine crushing equipment, thereby reducing equipment and maintenance costs and eliminating the grinding steps of intermediate materials in existing technologies, further reducing the overall process cost. By utilizing the size of the sedimentation tank feed port and the high-temperature melt and high-temperature flue gas in the furnace, the separation of copper-containing valuable materials from other materials can be achieved even when lumpy materials are fed into the furnace. Attached Figure Description

[0019] Figure 1This is a structural block diagram of the intermediate material processing system for double flash copper smelting in the first embodiment of the present invention;

[0020] Figure 2 This is a structural block diagram of another embodiment of the intermediate material processing system for double flash copper smelting in the first embodiment of the present invention;

[0021] Figure 3 This is a flowchart of the intermediate material processing technology in the second embodiment of the present invention.

[0022] illustrate:

[0023] 1. Feeding bin; 2. Jaw crusher; 3. Cone crusher; 4. Belt conveyor; 5. Vertical conveying equipment; 6. Pool top silo; 7. Feeder; 8. Flash smelting furnace; 9. Inclined conveying equipment; 10. Crane.

[0024] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0025] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] Example 1

[0028] Please see Figure 1 The figure shows an intermediate material processing system for double flash copper smelting according to the first embodiment of the present invention. It includes a coarse crushing device for coarse crushing of the intermediate material produced by double flash copper smelting and a fine crushing device for fine crushing of the intermediate material after coarse crushing. The fine crushing device is connected to the discharge end of the coarse crushing device. The intermediate material processing system also includes at least two conveying devices, which are interconnected. The two conveying devices are respectively connected to the discharge end of the fine crushing device and the sedimentation tank of the flash smelting furnace 8.

[0029] Specifically, the coarse crushing equipment is a jaw crusher 2, and the fine crushing equipment is a cone crusher 3. The jaw crusher 2 is used to crush the intermediate material to a first particle size value, and the cone crusher 3 is used to crush the intermediate material crushed by the jaw crusher 2 to a second particle size value. The discharge end of the jaw crusher 2 is connected to the feed end of the cone crusher 3. The first particle size value is greater than the second particle size value. After the jaw crusher 2 completes the crushing of the intermediate material, the crushed intermediate material is conveyed to the cone crusher 3 for further crushing, thereby improving the crushing effect of the intermediate material. By directly connecting the jaw crusher 2 and the cone crusher 3, the number of equipment is reduced and the operating cost of the equipment is saved. At the same time, it can also avoid the phenomenon of material falling during transfer.

[0030] In this embodiment, the intermediate material produced by double flash copper smelting has a particle size range of 300mm-500mm, a first particle size range of 50mm-100mm, and a second particle size range of 5mm-20mm.

[0031] In some alternative embodiments, due to plant height limitations, such as Figure 2 As shown, a large-angle conveying device 9 is provided between the jaw crusher 2 and the cone crusher 3. One end of the large-angle conveying device 9 is located directly below the discharge end of the jaw crusher 2, and the other end is located directly above the feed end of the cone crusher 3.

[0032] Furthermore, the at least two conveying devices include a vertical conveying device 5 for vertically conveying materials and a feeding conveying device connected to the discharge end of the vertical conveying device 5. The feeding conveying device is connected to the settling tank of the flash furnace 8, and a belt conveyor 4 is provided between the vertical conveying device 5 and the cone crusher 3.

[0033] Specifically, the vertical transmission device 5 adopts a bucket elevator, which can save the transmission distance between devices, thereby reducing the overall plant usage cost of the process; in some optional embodiments, the vertical transmission device 5 can also adopt a crane 10 and belt conveyor, and the belt conveyor method can realize fully mechanized transportation.

[0034] In this embodiment, the feed end of the coarse crushing equipment is provided with a feeding bin 1, and the feeding and conveying equipment includes a pool top hopper 6 and a feeder 7. The feed end of the pool top hopper 6 is connected to the discharge end of the vertical conveying equipment 5. Both the feeding bin 1 and the pool top hopper 6 are equipped with weighing devices, and the feeder 7 is equipped with a variable frequency speed control device. The speeds of the weighing devices and the feeder 7 are interlocked.

[0035] It should be noted that the intermediate material after fine crushing is sent to the top of the settling tank by a feeder and added into the settling tank through the feed port via a chute; the weighing device in the silo and the feeder are preset with variable frequency speed control, and the operating speed of the feeder and the weighing device are interlocked, so as to accurately measure the amount of material added into the furnace and minimize furnace condition fluctuations; after the intermediate material is melted by the high-temperature melt in the settling tank, the copper-containing material is captured by the copper matte and enters the copper matte, while other materials enter the slag, thus completing the recycling and processing of the intermediate material.

[0036] In summary, the intermediate material processing system for double flash copper smelting in the above embodiments of the present invention, by combining coarse crushing and fine crushing equipment, reduces the grinding steps of intermediate materials in the prior art while reducing equipment costs and maintenance costs, thereby further reducing the overall process cost; by utilizing the size of the feed port of the sedimentation tank and the high-temperature melt and high-temperature flue gas in the furnace, the separation of copper-containing valuable materials from other materials can be achieved even when lumpy materials are fed into the furnace.

[0037] Example 2

[0038] In another aspect, this invention also proposes an intermediate material processing technology, please refer to [link / reference needed]. Figure 3 The diagram illustrates the intermediate material processing technology for double flash copper smelting in a second embodiment of the present invention. Using the aforementioned intermediate material processing system, the process includes:

[0039] The intermediate materials produced by double flash copper smelting are coarsely crushed using coarse crushing equipment so that the particle size of the intermediate materials is crushed to the first particle size value.

[0040] The intermediate material after coarse crushing is further crushed by fine crushing equipment so that the particle size of the intermediate material is crushed to a second particle size value, which is smaller than the first particle size value.

[0041] The finely crushed intermediate material is vertically transported to another conveying device using any one of the conveying devices, so that the intermediate material is transported to the settling tank of the flash smelting furnace;

[0042] The finely crushed intermediate material is melted at high temperature in the settling tank of the flash smelting furnace. The copper-containing material in the finely crushed intermediate material is then fed into copper matte, and the remaining other materials are fed into slag to complete the recycling process.

[0043] In practice, intermediate materials collected from the furnace workshop are transported together by conveyor equipment for regular centralized processing. The intermediate materials are then hoisted to the feed hopper above the jaw crusher using a front-end loader or grab bucket. If the plant height is limited, a front-end loader can be used to add the intermediate materials to the feed hopper; if the plant height is not limited, a grab bucket can be used to add the intermediate materials to the feed hopper. The size of the intermediate materials should be controlled below 500mm; materials exceeding this size need to be manually crushed before being added to the feed hopper.

[0044] Furthermore, the intermediate material enters the jaw crusher below from the hopper. After coarse crushing in the jaw crusher, the particle size is reduced to 100mm (in this embodiment, the particle size range is 50-100mm). The coarsely crushed material is then fed into a cone crusher for further fine crushing, yielding material with a particle size of 15mm (in this embodiment, the particle size range is 10-20mm). If the plant height is limited, the jaw crusher and cone crusher can be connected by a steep-angle belt conveyor, and the coarsely crushed material can be transported to the cone crusher via the steep-angle belt conveyor. If the plant height is not limited, the two crushers can be directly connected, and the coarsely crushed material can directly enter the cone crusher for fine crushing.

[0045] Specifically, the finely crushed intermediate materials are transported by loading vehicles to the flash smelting furnace section, where they are lifted by cranes or bucket elevators and added to the top silo at the top of the settling tank of the smelting furnace. If the crushing plant is close to the smelting plant, belt conveyors can also be used to achieve fully mechanized transportation.

[0046] In some alternative embodiments, a mobile belt conveyor is installed below the discharge port of the cone crusher to unload the material into a ground-level feed hopper, which is then transported by truck to the smelting plant. Inside the plant, a crane lifts the feed hopper and adds it to a silo atop the settling tank of the flash smelting furnace.

[0047] The settling tank is equipped with a feeding port at the top. The material is fed to the top of the settling tank by a feeder and then added into the settling tank through the feeding port via a chute. The silo is equipped with a weighing device, and the feeder is equipped with a variable frequency speed control. The operating speed of the feeder is interlocked with the weighing device, so as to accurately measure the amount of material added to the furnace and minimize furnace condition fluctuations. After the intermediate material is melted by the high-temperature melt in the settling tank, the copper-containing material is captured by the copper matte and enters the copper matte, while other materials enter the slag, thus completing the recycling and processing of the intermediate material.

[0048] In summary, the intermediate material processing technology in the above embodiments of the present invention uses the aforementioned intermediate material processing system for double flash copper smelting. By combining coarse crushing and fine crushing equipment, it reduces equipment and maintenance costs while minimizing the grinding steps of intermediate materials in the prior art, further reducing the overall process cost. By utilizing the size of the sedimentation tank feed port and the high-temperature melt and flue gas in the furnace, the separation of copper-containing valuable materials from other materials can be achieved even when lumpy materials are fed into the furnace.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A system for handling intermediate material produced in a double flash copper smelting process, comprising a coarse crushing device for coarse crushing of the intermediate material produced in the double flash copper smelting process and a fine crushing device for fine crushing of the intermediate material after the coarse crushing, the fine crushing device being connected to the discharge end of the coarse crushing device, the system for handling intermediate material further comprising at least one conveying device, characterized in that The transmission device is connected to the discharge end of the fine crushing equipment and the top of the settling tank in the flash smelting furnace, so that the intermediate material after fine crushing is transmitted to the settling tank of the flash smelting furnace. The coarse crushing equipment includes a jaw crusher for crushing the intermediate material to a first particle size value, and the fine crushing equipment includes a cone crusher for crushing the intermediate material after coarse crushing to a second particle size value. The discharge end of the jaw crusher is connected to the feed end of the cone crusher. The first particle size value ranges from 50mm to 100mm, and the second particle size value ranges from 5mm to 20mm.

2. The intermediate material handling system for double flash copper smelting according to claim 1, characterized in that, A large-angle conveyor is provided between the jaw crusher and the cone crusher. One end of the large-angle conveyor is located directly below the discharge end of the jaw crusher, and the other end is located directly above the feed end of the cone crusher.

3. The intermediate material handling system for double flash copper smelting according to claim 2, characterized in that, The transmission equipment includes a feeding transmission device, which includes a top silo and a feeder connected to the discharge end of the top silo. The discharge end of the feeder is connected to the top of the sedimentation tank.

4. The intermediate material handling system for double flash copper smelting according to claim 3, characterized in that, A vertical conveying device is provided between the feeding and conveying device and the fine crushing device, and the vertical conveying device is used for vertically conveying materials.

5. The intermediate material handling system for double flash copper smelting according to claim 4, characterized in that, A belt conveyor is provided between the vertical conveying equipment and the cone crusher, and a feeding hopper is provided at the feed end of the coarse crushing equipment.

6. The intermediate material handling system for double flash copper smelting according to claim 5, characterized in that, Weighing devices are installed in both the feeding hopper and the top hopper of the pool, and the feeder is equipped with a variable frequency speed control device. The weighing devices and the feeder are interlocked in speed.

7. An intermediate material handling process for double flash copper smelting, using the intermediate material handling system as described in any one of claims 1 to 6, characterized in that, Includes the following steps: The intermediate materials produced by double flash copper smelting are coarsely crushed using coarse crushing equipment so that the particle size of the intermediate materials is crushed to the first particle size value. The intermediate material after coarse crushing is further crushed by fine crushing equipment so that the particle size of the intermediate material is crushed to a second particle size value, which is smaller than the first particle size value. The finely crushed intermediate material is vertically transported to another conveying device using any one of the conveying devices, so that the intermediate material is transported to the settling tank of the flash smelting furnace; The finely crushed intermediate material is melted at high temperature in the settling tank of the flash smelting furnace. The copper-containing material in the finely crushed intermediate material is then fed into the copper matte, and the remaining other materials are fed into the slag to complete the recycling process.

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