A material handling system for copper-containing slag

Abstract

The utility model provides a material processing system for copper-containing slag, the system includes a hard crushing device for hard crushing of materials, a coarse crushing device for coarse crushing of hard crushed materials, and a fine crushing device for fine crushing of coarse crushed materials, the coarse crushing device is connected to the discharge end of the hard crushing device, the fine crushing device is connected to the discharge end of the coarse crushing device, and the material processing system also includes at least one particle separation device, the particle separation device is connected to the discharge end of the fine crushing device. The utility model uses the particle separation device to screen the finely crushed materials to reduce the return rate and easily obtain materials of qualified particle size, so as to facilitate the complete reaction of the refined slag in the smelting furnace and efficiently recover the valuable metals therein, thereby avoiding a series of problems such as high frequency of equipment maintenance caused by the wear of the slag on the steam dryer, resulting in low factory operation rate.

Description

Technical Field

[0001] The utility model relates to the technical field of copper smelting material processing, in particular to a material processing system for copper-containing slag. Background Art

[0002] In the process of copper smelting, crude copper is oxidized and reduced to be refined into anode copper. After the oxidation period, the refined slag is discharged from the mouth of the refining furnace and stored in a slag bag or slag pan. After cooling, it forms large blocks with a slag block size of >1500mm. This part of the slag contains about 40% copper and needs to be recycled. In existing factory practices, a separate blast furnace is usually used to reduce the refined slag and separate the copper from it, and the black copper is returned to the system for refining, or a jaw crusher and a cone crusher are used to crush the refined slag to 15mm before returning it to the smelting furnace batching system.

[0003] The current material handling system for copper-containing slag, due to environmental issues of blast furnaces, new projects no longer build blast furnaces for processing anode refined slag. The method of cooling and crushing the refined slag to ~15mm and returning it to the smelting furnace batching system has problems such as increased wear on the steam dryer, incomplete reaction when added to the smelting furnace, and worsening furnace conditions due to the large product particles. A large amount of copper in the refined slag exists in the form of metallic copper and cuprous oxide. The good ductility of copper metal makes it very difficult to further crush the refined slag, which has always been a problem that plagues various copper smelters. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide a material processing system for copper-containing slag to at least solve the deficiencies in the above-mentioned technology.

[0005] The utility model proposes a material processing system for copper-containing slag, comprising a hard crushing device for hard crushing of materials, a coarse crushing device for coarsely crushing the hard crushed materials, and a fine crushing device for finely crushing the coarsely crushed materials, the coarse crushing device is connected to the discharge end of the hard crushing device, the fine crushing device is connected to the discharge end of the coarse crushing device, and the material processing system also includes at least one particle separation device, and the particle separation device is connected to the discharge end of the fine crushing device.

[0006] Furthermore, the hard crushing equipment includes a rock drill for crushing the particle size of the material to a first particle size value, the coarse crushing equipment includes a jaw crusher for crushing the particle size of the hard crushed material to a second particle size value, the fine crushing equipment includes a cone crusher for crushing the particle size of the intermediate material after coarse crushing to a third particle size value and a vertical mill for crushing the particle size of the finely crushed material to a qualified product particle size value, the qualified product particle size value is smaller than the third particle size value, the third particle size value is smaller than the second particle size value, and the second particle size value is smaller than the first particle size value.

[0007] Furthermore, a transport device is provided between the rock drill and the jaw crusher, and the transport device is used to transfer the material crushed by the rock drill to the jaw crusher.

[0008] Furthermore, the particle separation equipment includes a first vibrating screen, which is arranged at the outlet of the cone crusher, and is used to screen out materials with particle size values ​​within a first particle size range.

[0009] Furthermore, a buffer bin is provided between the first vibrating screen and the vertical mill, and a discharge end of the buffer bin is connected to a feed end of the vertical mill.

[0010] Furthermore, the material processing system also includes a specific gravity screen, and a second vibrating screen is provided between the specific gravity screen and the vertical mill, and the second vibrating screen is used to screen out materials with particle size values ​​in a second particle size range, and the second particle size range is smaller than the first particle size range.

[0011] Furthermore, a transfer bin is provided between the specific gravity screen and the second vibrating screen, and a discharge end of the transfer bin is connected to a feed end of the specific gravity screen.

[0012] The material processing system of copper-containing slag in the utility model reduces the step of grinding intermediate materials in the prior art on the premise of reducing equipment cost and maintenance cost by arranging a combination of hard crushing, coarse crushing and fine crushing equipment, thereby further reducing the cost of the overall process; the material after fine crushing is screened by particle separation equipment to reduce the return rate and easily obtain materials of qualified particle size, so as to facilitate the complete reaction of refined slag in the smelting furnace and efficiently recover the valuable metals therein, thereby avoiding a series of problems such as high frequency of equipment maintenance and low factory operation rate caused by the wear of slag on the steam dryer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural block diagram of the material processing system of copper-containing slag in the first embodiment of the utility model. Description of the drawings:

[0015] 1. Rock drill; 2. Jaw crusher; 3. Cone crusher; 4. First vibrating screen; 5. Buffer bin; 6. Vertical mill; 7. Second vibrating screen; 8. Transfer bin; 9. Specific gravity screen; 10. Front loader.

[0016] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0017] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0019] Embodiment 1

[0020] See also Figure 1 , shown is a material processing system for copper-containing slag in the first embodiment of the utility model, including hard crushing equipment for hard crushing of materials, coarse crushing equipment for coarsely crushing the hard crushed materials, and fine crushing equipment for finely crushing the coarsely crushed materials, the coarse crushing equipment is connected to the discharge end of the hard crushing equipment, the fine crushing equipment is connected to the discharge end of the coarse crushing equipment, and the material processing system also includes at least one particle separation equipment, and the particle separation equipment is connected to the discharge end of the fine crushing equipment.

[0021] In this embodiment, the hard crushing equipment includes a rock drill 1 for crushing the particle size of the material to a first particle size value, the coarse crushing equipment includes a jaw crusher 2 for crushing the particle size of the hard crushed material to a second particle size value, and the fine crushing equipment includes a cone crusher 3 for crushing the particle size of the intermediate material after coarse crushing to a third particle size value and a vertical mill 6 for crushing the particle size of the finely crushed material to a qualified product particle size value, the third particle size value is smaller than the second particle size value, and the second particle size value is smaller than the first particle size value.

[0022] Specifically, the material (slag) is first cooled to room temperature and then crushed to a first particle size value (in the present embodiment, the first particle size value is less than 200 mm) by the rock drill 1. When the rock drill 1 is crushing, the copper deposited at the bottom is initially separated from the slag at the top, and the large pieces of copper that are difficult to crush can be easily separated out. The large pieces of copper metal are returned to the refining process for processing. The rock drill 1 crushes the slag into blocks of less than 200 mm, which are then sent to the jaw crusher 2 for further crushing through transportation equipment (in the present embodiment, the transportation equipment adopts the front loader 10).

[0023] It should be noted that, depending on the difficulty of crushing copper and slag, large pieces of copper can be sorted manually after being crushed by the rock drill 1 .

[0024] Furthermore, the slag transmitted by the front loader 10 is coarsely crushed to a second particle size value (in the present embodiment, the second particle size value is less than 80 mm) by a jaw crusher. During the jaw crushing process, some copper wrapped in the slag will be exposed, which is easy to sort and inspect. After the coarse crushing is completed, the slag less than 80 mm will be sent to the cone crusher 3 for fine crushing, and a first vibrating screen 4 is arranged at the discharge end of the cone crusher 3. The particle size diameter of the first vibrating screen 4 is 15 mm. The screened materials larger than 15 mm are mostly copper and are returned to the anode refining. The screened materials smaller than 15 mm are sent to the next process.

[0025] It should be noted that a buffer bin 5 is provided between the first vibrating screen 4 and the vertical mill 6, and the discharge end of the buffer bin 5 is connected to the feed end of the vertical mill 6. During the jaw crushing discharge and belt transfer process, the belt speed is set to a low speed.

[0026] Furthermore, the particle separation equipment includes a vertical mill 6 that crushes the particle size of the finely crushed material to a qualified product particle size value, and the vertical mill 6 further crushes the slag <15mm, and connects a second vibrating screen 7 at the discharge end of the vertical mill 6, the particle size of the second vibrating screen 7 is 2mm, and the underscreen material <2mm meets the crushing requirements, and is sent to the concentrate warehouse for batching and then returned to the smelting system. The 2-15mm overscreen material contains copper and slag, which needs further processing. Since copper is not easy to crush, if all the 2-15mm overscreen materials are returned to the vertical mill 6, it will cause the difficult-to-grind copper to continuously circulate and accumulate in the system, causing the crushing system to be paralyzed. Therefore, the difference in specific gravity between copper and slag is used to connect a specific gravity screen 9 at the discharge end of the second vibrating screen 7, and the specific gravity screen 9 is used to separate copper from the slag, and the copper with a larger specific gravity is returned to the anode furnace, while the slag with a smaller specific gravity is returned to the vertical mill 6 for crushing again until it is <2mm.

[0027] During the crushing process, the material is transferred mainly through automatic transmission by belt conveyors, which reduces labor intensity and labor quotas; a transfer bin 8 is set in front of the vertical mill 6 and the specific gravity screen 9 to ensure continuous and stable feeding; negative pressure ventilation and dust removal measures are set in the crushing and each transfer process to prevent dust from escaping and improve the working environment.

[0028] By using the above multi-stage crushing and multiple copper slag sorting methods to crush the anode refining slag, the copper can be separated and returned to the anode refining, and the separated slag can be crushed to a particle size of less than 2mm and returned to the smelting system to meet the use requirements of the downstream process.

[0029] In summary, the material processing system for copper-containing slag in the above-mentioned embodiment of the utility model reduces the equipment cost and maintenance cost by setting a combination of hard crushing, coarse crushing and fine crushing equipment, reduces the step of grinding the intermediate material in the prior art, and further reduces the cost of the overall process; the particle separation equipment is used to screen the finely crushed material, so as to facilitate the complete reaction of the refined slag in the smelting furnace and efficiently recover the valuable metals therein, thereby avoiding a series of problems such as high frequency of equipment maintenance and low factory operating rate caused by the wear of the slag on the steam dryer.

[0030] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0031] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A material processing system for copper-containing slag, characterized in that: The invention comprises a hard crushing device for hard crushing of materials, a coarse crushing device for coarsely crushing the hard crushed materials and a fine crushing device for finely crushing the coarsely crushed materials, wherein the coarse crushing device is connected to the discharge end of the hard crushing device, and the fine crushing device is connected to the discharge end of the coarse crushing device. The material processing system further comprises at least one particle separation device, and the particle separation device is connected to the discharge end of the fine crushing device.

2. The material processing system for copper-containing slag according to claim 1, characterized in that: The hard crushing equipment includes a rock drill for crushing the particle size of the material to a first particle size value, the coarse crushing equipment includes a jaw crusher for crushing the particle size of the hard crushed material to a second particle size value, the fine crushing equipment includes a cone crusher for crushing the particle size of the intermediate material after coarse crushing to a third particle size value and a vertical mill for crushing the particle size of the finely crushed material to a qualified product particle size value, the qualified product particle size value is smaller than the third particle size value, the third particle size value is smaller than the second particle size value, and the second particle size value is smaller than the first particle size value.

3. The material processing system for copper-containing slag according to claim 2, characterized in that: A transport device is provided between the rock drill and the jaw crusher, and the transport device is used to transfer the material crushed by the rock drill to the jaw crusher.

4. The material processing system for copper-containing slag according to claim 3, characterized in that: The particle separation equipment comprises a first vibrating screen, which is arranged at the outlet of the cone crusher and is used to screen out materials with particle size values ​​within a first particle size range.

5. The material processing system for copper-containing slag according to claim 4, characterized in that: A buffer bin is provided between the first vibrating screen and the vertical mill, and a discharge end of the buffer bin is connected to a feed end of the vertical mill.

6. The material processing system for copper-containing slag according to claim 5, characterized in that: The material processing system also includes a specific gravity screen. A second vibrating screen is provided between the specific gravity screen and the vertical mill. The second vibrating screen is used to screen out materials with particle size values ​​in a second particle size range, and the second particle size range is smaller than the first particle size range.

7. The material processing system for copper-containing slag according to claim 6, characterized in that: A transfer bin is provided between the specific gravity screen and the second vibrating screen, and a discharge end of the transfer bin is connected to a feed end of the specific gravity screen.

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