A dry separation device and dry separation process for recovering metal from scrap steel crushing tailings

Abstract

The present invention relates to the field of metal recovery, and is a dry separation device for recovering metal from scrap steel crushing tailings, comprising a loader, a feeder, a first belt conveyor, a drum screen, an air separator and a leaping screen, wherein the output end of the loader is docked with the input end of the feeder, the output end of the feeder is docked with the input end of the first belt conveyor, the output end of the first belt conveyor is docked with the input end of the drum screen, and the raw materials are transported to the drum screen through the loader, the feeder and the first belt conveyor, and the drum screen is used to screen the raw materials into extra-large materials, large materials, medium materials and small materials according to the material particle size, and the drum screen has four material outlets to output and connect the large material screening line, the medium material screening line and the small material screening line respectively. This dry separation device can improve the metal recovery rate, save water at the same time, and can screen out various types of screened materials in the mixed raw materials separately, saving labor costs. The present invention also proposes a dry separation process for recovering metal from scrap steel crushing tailings.

Description

Technical Field

[0001] The invention relates to the field of metal recovery, and particularly relates to a dry separation device and a dry separation process for recovering metal from scrap steel crushing tailings. Background Art

[0002] The advancement of science and technology has led to the rapid replacement of various materials, and the elimination of various old materials, which has also given rise to various types of garbage. Among them, garbage such as scrap cars, motorcycles, and old household appliances are being valued and reused because of their material composition. The useful materials in them are recycled, creating considerable economic value and social benefits.

[0003] However, many existing production lines are manually operated, with low metal recovery rates. Often, many small-sized metals are discarded, resulting in a waste of resources and high labor costs. Some use wet selection processes, causing environmental pollution.

[0004] Existing recycling technologies are even more inadequate. Scrap steel tailings contain a lot of flocculent matter, which is very easy to entangle and hook on objects. If not removed, it will seriously affect the metal sorting, resulting in low recovery rate and poor purity of the selected metals. In addition, in the treatment of small particles, the existing technology mostly uses cylindrical screens, which have low screening efficiency. The stainless steel in the material cannot be recycled mechanically and efficiently, and most of them are sorted manually. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a dry separation device for recovering metals from scrap steel crushing tailings, which can improve the metal recovery rate, save water, and can separate various types of screened materials from mixed raw materials separately, thus saving labor costs to the greatest extent. The present invention also proposes a dry separation process for recovering metals from scrap steel crushing tailings.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] In the first technical scheme, a dry selection device for recovering metals from scrap steel crushing tailings includes a loader, a feeder, a first belt conveyor, a drum screen, an air separator and a leap screen, wherein the output end of the loader is connected to the input end of the feeder, the output end of the feeder is connected to the input end of the first belt conveyor, the output end of the first belt conveyor is connected to the input end of the drum screen, and the raw materials are transported to the drum screen through the loader, the feeder and the first belt conveyor. The drum screen is used to screen the raw materials into extra-large materials, large materials, medium materials and small materials according to the material particle size. The drum screen has four material outlets to output and connect the large material screening line, the medium material screening line and the small material screening line respectively.

[0008] In the first technical solution, as a preferred method, the large material screening line includes a first air separator, a second belt conveyor, a first permanent magnet sorting device, a first eddy current separator and a first stainless steel separator. The input end of the first air separator is connected to the cylindrical screen. The first air separator is used to separate the flocs mixed in the large material. The output end of the first air separator is connected to the input end of the second belt conveyor. The first permanent magnet sorting device, the first eddy current separator and the first stainless steel separator are arranged on the second belt conveyor in sequence. The first permanent magnet sorting device, the first eddy current separator and the first stainless steel separator are respectively used to screen out iron, non-ferrous metals and stainless steel in the large material. The unscreened materials of the large material are transported by the second belt conveyor to form a pile.

[0009] In the first technical solution, as a preferred method, the large material screening line includes a second air separator, a third belt conveyor, a second permanent magnet sorting device, a second eddy current separator and a second stainless steel separator. The input end of the second air separator is connected to the cylindrical screen, and the second air separator is used to separate the mixed flocs in the medium material. The output end of the second air separator is connected to the input end of the third belt conveyor. The second permanent magnet sorting device, the second eddy current separator and the second stainless steel separator are arranged on the third belt conveyor in sequence. The second permanent magnet sorting device, the second eddy current separator and the second stainless steel separator are respectively used to screen out iron, non-ferrous metals and stainless steel in the medium material, and the unscreened materials in the medium material are transported by the third belt conveyor to form a pile.

[0010] In the first technical solution, as a preferred method, the small material screening line includes a leaping screen, a fourth belt conveyor, a fourth permanent magnet sorting device, and a third eddy current separator, wherein the input end of the leaping screen is connected to the cylindrical screen, and the output end of the leaping screen is connected to the input end of the fourth belt conveyor, and the fourth permanent magnet sorting device and the third eddy current separator are respectively arranged on the fourth belt conveyor, and the fourth permanent magnet sorting device and the third eddy current separator respectively screen out iron and non-ferrous metals in the small materials, and the output end of the fourth belt conveyor is connected to the first re-selection device, and the screened material of the leaping screen enters the second re-selection device.

[0011] In the first technical solution, preferably, the first re-selection device is a fourth eddy current separator, wherein the fourth eddy current separator is used for re-selecting non-ferrous metals in small materials.

[0012] In the first technical solution, as a preference, the second re-selection device includes a fifth belt conveyor, a third permanent magnetic sorting device, a dry sorting machine and a wind separator, wherein the input end of the fifth belt conveyor is connected to the underside of the leaping screen, the third permanent magnetic sorting device is arranged on the fifth belt conveyor, the input ends of the dry sorting machine and the wind separator are respectively connected to the two output ends of the third permanent magnetic sorting device, the third permanent magnetic sorting device is used to select the magnetic materials entering the second re-selection device, wherein the magnetic materials enter the dry sorting machine, and the non-magnetic materials enter the wind separator, the dry sorting machine is used to separate dust and iron powder from the magnetic materials, and the wind separator is used to separate metals and sand, as well as glass and wood chips from the non-magnetic materials.

[0013] In the first technical solution, preferably, the feeder is a chain plate feeder.

[0014] In a second technical solution, a dry separation process for recovering metals from scrap steel crushing tailings uses the dry separation device for recovering metals from scrap steel crushing tailings as described in the first technical solution, feeds raw materials into a feeder, and conveys the raw materials to a drum screen through the feeder and a first belt, and the raw materials are screened by the drum screen into extra-large materials, large materials, medium materials, and small materials, and the extra-large materials are sorted by manual selection, and the large materials, medium materials, and small materials enter the large material screening line, the medium material screening line, and the small material screening line, respectively;

[0015] In the large material screening line and the medium material screening line, the floccules are first screened out by the air separator, the iron is screened out by the permanent magnetic separation equipment, the non-ferrous metals are screened out by the eddy current separator, and the stainless steel is screened out by the stainless steel separator, so as to realize the material screening of large materials and medium materials;

[0016] In the small material screening line, the small materials screened by the drum are screened again by the leaping screen, and the underscreen materials are discharged onto the belt conveyor and then sorted by the permanent magnetic equipment to select the iron parts; the overscreen materials of the leaping screen are discharged onto another belt conveyor and sorted by the permanent magnetic equipment. The selected magnetic materials are then sorted by the dry separator to select the iron powder, and the non-magnetic materials enter the wind separator to select the remaining metal objects.

[0017] The beneficial effects of using the present invention are:

[0018] 1. Compared with the prior art, the present invention adds an air separator in the process flow to remove flocs first, effectively improving the recovery rate and purity of metals; the present invention replaces the cylindrical screen with a leaping screen, greatly improving the screening efficiency; the present invention utilizes the characteristics of stainless steel and sets a stainless steel sorting machine at the end, effectively improving the recovery efficiency of stainless steel.

[0019] 2. Compared with the prior art, in the process of treating scrap steel crushing tailings, the present invention arranges mechanized equipment in an orderly and reasonable manner according to the characteristics of the metals contained therein, and separates different metals one by one through a series of screening and sorting, with high recovery efficiency, high rate of debris removal, and significant economic effect; at the same time, the treatment process belongs to a dry process, and no water is added throughout the process to avoid water pollution. The overall process has a high degree of automation, high sorting purity and efficiency, and mechanical separation is pollution-free, which greatly reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The schematic diagram of the dry separation device for recovering metals from scrap steel crushing tailings of the present invention is shown.

[0021] Reference numerals include:

[0022] 1-loader, 2-feeder, 3-first belt conveyor, 4-drum screen, 5-second air separator, 6-first air separator, 7-second belt conveyor, 8-second permanent magnet sorting equipment, 9-first permanent magnet sorting equipment, 10-second eddy current separator, 11-first eddy current separator, 12-second stainless steel separator, 13-first stainless steel separator, 14-fourth eddy current separator, 15-third eddy current separator, 16-fourth permanent magnet separator, 17-third belt conveyor, 18-fourth belt conveyor, 19-wind separator, 20-dry separator, 21-third permanent magnet separator, 22-fifth belt conveyor, 23-leap forward screen. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the technical solution more clear, the technical solution is further described in detail below in conjunction with specific implementation methods. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the technical solution.

[0024] Example 1

[0025] like Figure 1 As shown, this embodiment proposes a dry selection device for recovering metal from scrap steel crushing tailings, including a loader 1, a feeder 2, a first belt conveyor 3, a drum screen 4, an air separator and a leap screen 23, wherein the output end of the loader 1 is connected to the input end of the feeder 2, the output end of the feeder 2 is connected to the input end of the first belt conveyor 3, the output end of the first belt conveyor 3 is connected to the input end of the drum screen 4, and the raw materials are transported to the drum screen 4 through the loader 1, the feeder 2 and the first belt conveyor 3. The drum screen 4 is used to screen the raw materials into extra-large materials, large materials, medium materials and small materials according to the material particle size. The drum screen 4 has four material outlets to output the large material screening line, the medium material screening line and the small material screening line respectively.

[0026] The bulk material screening line includes a first air separator 6, a second belt conveyor 7, a first permanent magnet sorting device 9, a first eddy current separator 11 and a first stainless steel separator 13. The input end of the first air separator 6 is connected to the cylindrical screen 4. The first air separator 6 is used to separate the flocs mixed in the bulk material. The output end of the first air separator 6 is connected to the input end of the second belt conveyor 7. The first permanent magnet sorting device 9, the first eddy current separator 11 and the first stainless steel separator 13 are arranged on the second belt conveyor 7 in sequence. The first permanent magnet sorting device 9, the first eddy current separator 11 and the first stainless steel separator 13 are respectively used to screen out iron, non-ferrous metals and stainless steel in the bulk material. The unscreened materials of the bulk material are transported by the second belt conveyor 7 to form a material pile.

[0027] The large material screening line includes a second air separator 5, a third belt conveyor 17, a second permanent magnet sorting device 8, a second eddy current separator 10 and a second stainless steel separator 12. The input end of the second air separator 5 is connected to the cylindrical screen 4. The second air separator 5 is used to separate the mixed flocs in the medium material. The output end of the second air separator 5 is connected to the input end of the third belt conveyor 17. The second permanent magnet sorting device 8, the second eddy current separator 10 and the second stainless steel separator 12 are arranged on the third belt conveyor 17 in sequence. The second permanent magnet sorting device 8, the second eddy current separator 10 and the second stainless steel separator 12 are respectively used to screen out iron, non-ferrous metals and stainless steel in the medium material. The unscreened materials in the medium material are transported by the third belt conveyor 17 to form a material pile.

[0028] The small material screening line includes a leaping screen 23, a fourth belt conveyor 18, a fourth permanent magnet sorting device 16, and a third eddy current separator 15, wherein the input end of the leaping screen 23 is connected to the cylindrical screen 4, and the output end of the leaping screen 23 is connected to the input end of the fourth belt conveyor 18, the fourth permanent magnet sorting device 16 and the third eddy current separator 15 are respectively arranged on the fourth belt conveyor 18, the fourth permanent magnet sorting device 16 and the third eddy current separator 15 respectively screen out iron and non-ferrous metals in the small materials, the output end of the fourth belt conveyor 18 is connected to the first re-selection device, and the screened material of the leaping screen 23 enters the second re-selection device.

[0029] In this embodiment, the first reselection device is a fourth eddy current separator 14, wherein the fourth eddy current separator 14 is used to reselect nonferrous metals in small materials. The second reselection device includes a fifth belt conveyor 22, a third permanent magnetic separator 21, a dry separator 20 and a wind separator 19, wherein the input end of the fifth belt conveyor 22 is connected to the under-screen of the leaping screen 23, the third permanent magnetic separator 21 is arranged on the fifth belt conveyor 22, the input ends of the dry separator 20 and the wind separator 19 are connected to the two output ends of the third permanent magnetic separator 21 respectively, and the third permanent magnetic separator 21 is used to select the magnetic material entering the second reselection device, wherein the magnetic material enters the dry separator 20, and the non-magnetic material enters the wind separator 19, the dry separator 20 is used to separate dust and iron powder from the magnetic material, and the wind separator 19 is used to separate metal and sand, as well as glass and wood chips from the non-magnetic material.

[0030] The following describes in detail the use process of the dry-selection device in combination with the above technical solution.

[0031] The raw materials are sent from the loader 1 to the chain plate feeder 2, and then transferred to the first belt conveyor 3, and then sent from the first belt conveyor 3 to the drum screen 4. The drum screen 4 selects the extra-large materials, large materials, medium materials and small materials according to the particle size of the materials. The selected extra-large materials are manually sorted, and the large materials and medium materials enter the first air separator 6 and the second air separator 5 respectively to separate the mixed floccules. The tailings are then discharged to the second belt conveyor 7 and the third belt conveyor 17 respectively. The second belt conveyor 7 is provided with a first permanent magnetic separation device 9, and the third belt conveyor 17 is provided with a second permanent magnetic separation device Device 8, so far the iron in the material is sorted out; and the small material is discharged from the cylindrical screen 4 and enters the leaping screen 23, the screened material enters the fifth belt conveyor 22, the fifth belt conveyor 22 is provided with a third permanent magnetic sorting device 21, the selected magnetic material enters the dry separator 20, and the iron powder is sorted out, and the tailings of the fifth belt conveyor 22 enter the wind separator 19 to sort out metals, sand and gravel and other materials; the screened material of the leaping screen 23 enters the fourth belt conveyor 18, and the fourth belt conveyor 18 is provided with a fourth permanent magnetic sorting device 16 to sort out the iron in the material.

[0032] The recovery of non-ferrous metals is the second step of the process. The tailings of the materials on the second belt conveyor 7 and the third belt conveyor 17 after iron selection enter the first eddy current separator 11 and the second eddy current separator 10 respectively, thereby separating the non-ferrous metals; the materials on the fourth belt conveyor 18 are small particles. In order to improve the recovery rate, they need to be sorted twice. First, the tailings after iron selection enter the third eddy current separator 15 for the initial sorting of non-ferrous metals, and the sorted tailings enter the fourth eddy current separator 14 for re-selection. At this point, the recovery of non-ferrous metals is completed.

[0033] The recycling of stainless steel is the third step of the process. The tailings after sorting by the first eddy current separator 11 and the second eddy current separator 10 enter the first stainless steel separator 13 and the second stainless steel separator 12 respectively to separate the stainless steel therein.

[0034] Through the above operation, iron, non-ferrous metals and stainless steel can be classified and recycled one by one without water pollution, thus realizing the efficient recovery of metal materials in scrap steel crushing tailings.

[0035] Example 2

[0036] The present embodiment proposes a dry separation process for recovering metals from scrap steel crushing tailings. The dry separation device for recovering metals from scrap steel crushing tailings in embodiment 1 is used, raw materials are put into a feeder 2, and the raw materials are transported to a drum screen 4 through the feeder 2 and a first belt. The raw materials are screened by the drum screen 4 into extra-large materials, large materials, medium materials and small materials. The extra-large materials are sorted by manual selection, and the large materials, medium materials and small materials enter the large material screening line, the medium material screening line and the small material screening line respectively; in the large material screening line and the medium material screening line, the floccules are first screened out by an air separator, and then the floccules are screened out by the air separator. The permanent magnetic separation equipment screens out iron, the eddy current separator screens out non-ferrous metals, and the stainless steel separator screens out stainless steel, thereby realizing the screening of large and medium materials. In the small material screening line, the small material selected by the cylindrical screen 4 is screened again by the leap screen 23, and the underscreen material is discharged onto the belt conveyor, and then sorted by the permanent magnetic equipment to select the iron parts therein. The overscreen material of the leap screen 23 is discharged onto another belt conveyor, and sorted by the permanent magnetic equipment. The selected magnetic material is then sorted by the dry separator 20 to select the iron powder therein, and the non-magnetic material enters the wind separator 19 to select the remaining metal objects.

[0037] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present technical content. As long as these changes do not deviate from the concept of the present invention, they all fall within the scope of protection of this patent.

Claims

1. A dry separation device for recovering metal from scrap steel crushing tailings, characterized in that: It includes a loader, a feeder, a first belt conveyor, a drum screen, an air separator and a leaping screen, wherein the output end of the loader is connected to the input end of the feeder, the output end of the feeder is connected to the input end of the first belt conveyor, the output end of the first belt conveyor is connected to the input end of the drum screen, the raw materials are transported to the drum screen through the loader, the feeder and the first belt conveyor, the drum screen is used to screen the raw materials into extra-large materials, large materials, medium materials and small materials according to the material particle size, and the drum screen has four material outlets to output the materials to the large material screening line, the medium material screening line and the small material screening line respectively; The bulk material screening line includes a first air separator, a second belt conveyor, a first permanent magnetic separator, a first eddy current separator and a first stainless steel separator. The input end of the first air separator is connected to the cylindrical screen. The first air separator is used to separate the mixed floccules in the bulk material. The output end of the first air separator is connected to the input end of the second belt conveyor. The first permanent magnetic separator, the first eddy current separator and the first stainless steel separator are sequentially arranged on the second belt conveyor. The first permanent magnetic separator, the first eddy current separator and the first stainless steel separator are respectively used to screen out iron, non-ferrous metals and stainless steel in the bulk material. The unscreened materials of the bulk material are transported by the second belt conveyor to form a material pile. The medium material screening line includes a second air separator, a third belt conveyor, a second permanent magnet separator, a second eddy current separator and a second stainless steel separator. The input end of the second air separator is connected to the cylindrical screen. The second air separator is used to separate the mixed floccules in the medium material. The output end of the second air separator is connected to the input end of the third belt conveyor. The second permanent magnet separator, the second eddy current separator and the second stainless steel separator are sequentially arranged on the third belt conveyor. The second permanent magnet separator, the second eddy current separator and the second stainless steel separator are respectively used to screen out iron, non-ferrous metals and stainless steel in the medium material. The unscreened materials in the medium material are transported by the third belt conveyor to form a material pile. The small material screening line includes a leaping screen, a fourth belt conveyor, a fourth permanent magnet sorting device, and a third eddy current sorting machine, wherein the input end of the leaping screen is connected to the cylindrical screen, and the output end of the leaping screen is connected to the input end of the fourth belt conveyor. The fourth permanent magnet sorting device and the third eddy current sorting machine are respectively arranged on the fourth belt conveyor. The fourth permanent magnet sorting device and the third eddy current sorting machine respectively screen out iron and non-ferrous metals in the small materials. The output end of the fourth belt conveyor is connected to the first re-selection device, and the screened material of the leaping screen enters the second re-selection device.

2. The dry separation device for recovering metals from scrap steel crushing tailings according to claim 1 is characterized in that: The first re-selection device is a fourth eddy current separator, wherein the fourth eddy current separator is used for re-selecting non-ferrous metals in small materials.

3. The dry separation device for recovering metals from scrap steel crushing tailings according to claim 1 is characterized in that: The second re-selection device includes a fifth belt conveyor, a third permanent magnetic separation device, a dry separator and a wind separator, wherein the input end of the fifth belt conveyor is connected to the underside of the leaping screen, the third permanent magnetic separation device is arranged on the fifth belt conveyor, the input ends of the dry separator and the wind separator are respectively connected to the two output ends of the third permanent magnetic separation device, the third permanent magnetic separation device is used to select the magnetic materials entering the second re-selection device, wherein the magnetic materials enter the dry separator, and the non-magnetic materials enter the wind separator, the dry separator is used to separate dust and iron powder from the magnetic materials, and the wind separator is used to separate metal, sand and gravel, as well as glass and wood chips from the non-magnetic materials.

4. The dry separation device for recovering metals from scrap steel crushing tailings according to claim 1 is characterized in that: The feeder is a chain plate feeder.

5. A dry separation process for recovering metals from scrap steel crushing tailings, using the dry separation device for recovering metals from scrap steel crushing tailings as claimed in any one of claims 1 to 4, characterized in that: The raw materials are put into the feeder, and are transported to the drum screen through the feeder and the first belt. The raw materials are screened by the drum screen into extra-large materials, large materials, medium materials and small materials. The extra-large materials are sorted by hand, and the large materials, medium materials and small materials enter the large material screening line, the medium material screening line and the small material screening line respectively; In the large material screening line and the medium material screening line, the floccules are first screened out by the air separator, the iron is screened out by the permanent magnetic separation equipment, the non-ferrous metals are screened out by the eddy current separator, and the stainless steel is screened out by the stainless steel separator, so as to realize the material screening of large materials and medium materials; In the small material screening line, the small materials screened by the drum are screened again by the leaping screen, and the underscreen materials are discharged onto the belt conveyor and then sorted by the permanent magnetic equipment to select the iron parts; the overscreen materials of the leaping screen are discharged onto another belt conveyor and sorted by the permanent magnetic equipment. The selected magnetic materials are then sorted by the dry separator to select the iron powder, and the non-magnetic materials enter the wind separator to select the remaining metal objects.

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