Aluminum metal extraction system from waste incinerator slag

Abstract

The application provides an aluminum metal extraction system of waste incineration slag, and relates to the field of waste incineration slag recycling. The aluminum metal extraction system of waste incineration slag comprises a first dehydration screen and a second dehydration screen. After the 32-75 mu m water-sand mixture is separated by the first dehydration screen, the remaining slag is transferred to the second dehydration screen. Then, the second dehydration screen divides the slag into 75-3 mm sand, 3-40 mm sand and sand larger than 40 mm. The aluminum metal extraction system of waste incineration slag can divide the slag with different diameters into different eddy current separators for processing. The drying and dispersing vibration equipment can dry the slag. The water-containing slag can be dispersed by using the scraping teeth and vibration. When the water content and particle diameter of the dispersed slag are high, the discharge plate vibrates and hits the scraping teeth, so that the slag can be better dispersed. The particle diameter is large, and the water content is low, so the scraping teeth can be directly used to disperse the slag. After the slag is dispersed and dried, the subsequent sorting equipment can more completely pick out the aluminum slag inside.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of slag waste recycling, in particular to an aluminum metal extraction system for waste incineration slag. BACKGROUND

[0002] Slag is a general solid waste that can be resourceized, if it is treated as a general solid waste in a landfill, it will increase the pressure of the landfill capacity, and the resource utilization of slag is a new topic of waste incineration slag treatment research at present. After processing, the slag can be used as a building material to make high-strength baking-free bricks, which is a new way of slag resource utilization. The slag comprehensive treatment resource utilization project achieves the purpose of turning waste into treasure. The slag after waste incineration is mainly composed of molten slag, ceramic fragments, glass, sand and other non-combustible substances and unburned organic matter. After technical treatment, the slag is suitable for making baking-free bricks or other building materials, and has certain recycling value. The aluminum contained in the slag can be sorted by an eddy current separator. Waste aluminum is a valuable resource, and effective recycling and utilization of waste aluminum is of great significance to the development of circular economy, resource and energy saving, and reduction of greenhouse gas and harmful substance emissions. The renewable aluminum industry is an essential part of the world's aluminum industry, and is an indispensable part of the sustainable development of the world's aluminum industry, with great market potential and development prospects. Waste aluminum can also be sold to smelting plants for resource recycling.

[0003] Because the density of aluminum material is only slightly larger than that of non-metallic slag sand material, it is difficult to separate aluminum material from sand material by buoyancy selection. When the aluminum material passes through the non-ferrous metal eddy current separator, an eddy current is generated, which generates a reverse magnetic field force, which repels the magnetic field of the eddy current separator itself, so that the aluminum material flows out of the slag. If the aluminum sorting system process is not processed, the purified sand material will cause brick body explosion due to the oxidation reaction of aluminum material when making bricks.

[0004] However, the current aluminum removal system generally directly processes the slag after water washing, at this time the slag has a certain water content, and the aluminum sheet, filter residue, particles and powder are concentrated together. If a eddy current separator is used directly in the later stage, many filter residues are still difficult to separate. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides an aluminum metal extraction system for waste incineration slag, which solves the problems raised in the above background art.

[0006] In order to achieve the above object, the present application is realized by the following technical scheme: the aluminum metal extraction system of the garbage incineration slag, comprising a first dehydration screen and a second dehydration screen, after the 32-75 mu m water sand mixture is separated by the first dehydration screen, the remaining slag is transmitted to the second dehydration screen, and then the second dehydration screen divides the slag into 75-3 mm sand, 3-40 mm sand and sand larger than 40 mm; it also comprises three groups of eddy current sorting machines for processing three different specifications of sand.

[0007] Preferably, the eddy current sorting machine comprises a sorting device and a drying and dispersing vibration device, the drying and dispersing vibration device is installed at the feeding end of the sorting device, used for receiving the discharge of the second dehydration screen, and used for separating and dehydrating the received sand.

[0008] Preferably, the drying and dispersing vibration device comprises a discharging plate, a top plate and a drying assembly, the discharging plate is inclinedly arranged and divided into a high end and a low end, the top plate is horizontally arranged above the discharging plate and is suspendedly fixed with the discharging plate, the drying assembly is provided with two groups and is respectively installed on the upper surface of the top plate and the bottom surface of the discharging plate, and is used for transmitting dry hot air between the discharging plate and the top plate.

[0009] The drying and dispersing vibration device further comprises a vibrating member and a separating member, the vibrating member is used for installing and vibrating the discharging plate and the top plate, and the separating member is arranged between the top plate and the discharging plate.

[0010] Preferably, the vibrating member comprises a bottom beam and two groups of longitudinal beams, the bottom beam is provided with two groups of longitudinal beams, the bottom of one group of longitudinal beams is fixedly provided with a spring, the spring is fixed with the bottom beam, and the group of longitudinal beams is fixed on the high end of the discharging plate.

[0011] The bottom of the other group of longitudinal beams is fixedly provided with a rubber column and a sliding block, a square sleeve and a vibrating machine are fixedly arranged on the corresponding bottom beam, the sliding block is arranged in the square sleeve and is slidably connected with the square sleeve, the vibrating machine is installed at the bottom of the square sleeve and is used for vibrating the sliding block, and the group of longitudinal beams is fixed with the low end of the discharging plate.

[0012] The top plate is fixedly arranged by four longitudinal beams.

[0013] Preferably, the separating member comprises two groups of scraping teeth and a balance frame fixedly connected with the two groups of scraping teeth.

[0014] Preferably, one of the eddy current sorting machines, the balance frame of which is fixedly installed on the longitudinal beam, and the discharging plate corresponds to the sand outlet larger than 40 mm.

[0015] Preferably, the balance frames of the other two eddy current sorting machines are fixedly installed on the bottom beam, and the discharging plates correspond to the 75-3 mm sand and the 3-40 mm sand respectively.

[0016] Preferably, the blanking plate and the top plate are provided with a plurality of air holes, the drying assembly comprises a closed cover and a dry hot air pipe, the closed cover covers the air holes, and the dry hot air pipe is in communication with the inside of the closed cover.

[0017] Preferably, the scraping teeth are pointed at one end towards the high end of the blanking plate, each group of scraping teeth is a plurality of equidistantly distributed scraping teeth, and the two groups of scraping teeth are staggered.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] 1. The aluminum metal extraction system of the waste incineration slag can process different diameter slags in different eddy current sorting machines, the drying and dispersing vibration equipment can dry the slag, the scraping teeth and vibration can disperse the slag containing water, when the slag containing water and having a small particle diameter is dispersed, the blanking plate vibrates and hits the scraping teeth, the slag can be better dispersed, the particle diameter is large and the water content is low, the scraping teeth can be directly used to disperse, and after the dispersion and drying, the subsequent sorting equipment can more completely pick out the aluminum slag inside.

[0020] 2. The aluminum metal extraction system of the waste incineration slag can cover all diameter sand particles by using three groups of eddy current sorting machines, so that the efficiency of extracting aluminum is higher than that of the traditional aluminum sorting system, and secondary repeated sorting is not needed. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the extraction system of the present application;

[0022] Figure 2 It is a structure diagram of the eddy current sorting machine of the present application;

[0023] Figure 3 It is a structure diagram of the eddy current sorting machine of the present application;

[0024] Figure 4 It is a front view of the eddy current sorting machine of the present application;

[0025] Figure 5 It is a structure diagram of the drying and dispersing vibration equipment of the present application;

[0026] Figure 6 It is a structure diagram of the drying and dispersing vibration equipment of the present application;

[0027] Figure 7 It is a structure diagram of the drying assembly of the present application;

[0028] Figure 8 It is a structure diagram of the separation piece of the present application;

[0029] Figure 9 It is a structure diagram of the vibration piece of the present application.

[0030] In the figure: 1, sorting device; 2, drying and dispersing vibration device; 201, discharging plate; 202, top plate; 203, drying assembly; 2031, closed cover; 2032, dry hot air pipe; 204, vibration piece; 2041, bottom beam; 2042, longitudinal beam; 2043, spring; 2044, rubber column; 2045, sliding block; 2046, square sleeve; 2047, vibration machine; 205, separating piece; 2051, scraping tooth; 2052, balance frame; 206, air hole. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement condition and the like between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0033] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that the technical solutions can be realized by those skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection claimed by the present application.

[0035] As Figures 1-9As shown, the aluminum metal extraction system of the waste incineration slag includes a first dehydration screen and a second dehydration screen. After the 32 μm-75 μm water-sand mixture is separated by the first dehydration screen, the remaining slag is transferred to the second dehydration screen, and then the second dehydration screen separates the slag into 75 μm-3 mm sand, 3 mm-40 mm sand, and sand larger than 40 mm.

[0036] It also includes three sets of eddy current sorting machines for processing three different sizes of sand.

[0037] Since the density of aluminum is only slightly larger than that of non-metallic slag sand, it is difficult to separate aluminum from sand by buoyancy selection. If the aluminum is not processed by the aluminum sorting system, the purified sand will cause the brick to burst due to the oxidation reaction of aluminum when making bricks. Therefore, the 32 µm~75 µm, 75 µm~3 mm, 3 mm~40 mm particle size sand and >40 mm slag head (skeletal material) of the sand particle size classification and dehydration system process are respectively recovered by the aluminum sorting equipment eddy current sorting machine.

[0038] When aluminum passes through the non-ferrous eddy current sorting machine, it will generate an eddy current and produce a reverse magnetic field force, which repels the inherent magnetic field of the eddy current sorting machine, and thus flows out of the slag. Port 1: clean sand is separated into 32 µm~75 µm, 75 µm~3 mm, 3 mm~40 mm sand of three different particle sizes and >40 mm slag head by four-stage aluminum sorting system process.

[0039] 1>40mm slag head (skeletal material) is transported back to the slag yard by a loader for repeated crushing process to break the slag head to a particle diameter of less than 15 mm (i.e. product: coarse aggregate 3mm-40mm), which is used as a main additive for brick making.

[0040] 32 µm~75 µm, 75 µm~3 mm, 3 mm~40 mm three different particle size product sand (i.e. finished product fine material: 32 µm~2 mm, sand: 2 mm~6 mm coarse aggregate: 3 mm~40 mm) can be used as follows:

[0041] ;

[0042] In an optional embodiment, the eddy current sorting machine includes a sorting device 1 and a drying and dispersing vibration device 2 installed at the feed end of the sorting device 1 for receiving the discharge of the second dehydration screen, for separating and dehydrating the received sand.

[0043] In this embodiment, the sorting device 1 is a subsequent device of the existing eddy current sorting machine, including a feeding system and a permanent magnet system. When the high-speed rotating permanent magnet roller generates an alternating magnetic field, the aluminum metal generates eddy currents through the magnetic field. These eddy currents generate a magnetic field opposite to the original magnetic field, thereby generating a repulsive force on the metal particles. Non-metal materials fall freely, while non-ferrous metals are thrown further away due to the repulsive force, achieving separation.

[0044] Unlike the prior art, the existing vibrating feeder is replaced by the drying and dispersing vibrating device 2.

[0045] In an optional embodiment, the drying and dispersing vibrating device 2 includes a feeding plate 201, a top plate 202, and a drying assembly 203. The feeding plate 201 is inclined and divided into a high end and a low end. The top plate 202 is horizontally arranged above the feeding plate 201 and is suspendedly fixed to the feeding plate 201. The drying assembly 203 is provided with two groups, which are respectively installed on the upper surface of the top plate 202 and the bottom surface of the feeding plate 201, for transmitting dry hot air between the feeding plate 201 and the top plate 202.

[0046] The drying and dispersing vibrating device 2 further includes a vibrating member 204 and a separating member 205. The vibrating member 204 is used to install and vibrate the feeding plate 201 and the top plate 202. The separating member 205 is arranged between the top plate 202 and the feeding plate 201.

[0047] In this embodiment, the feeding plate 201 has a U-shaped structure, and the high end is provided with a feeding port for receiving sand materials from the dewatering screen. The drying assembly 203 is connected to a heating device in the factory area or uses an external ceramic heater to provide heat. The dry hot air brought by the two groups of drying assemblies 203 acts together between the top plate 202 and the feeding plate 201, so that the sand materials passing between them can be further dewatered. In this process, in order to save energy, it is not necessary to completely dry the sand materials, but only to remove the moisture on the surface of the sand materials, which is convenient for subsequent turning over of the sand materials.

[0048] In an optional embodiment, the vibrating member 204 includes a bottom beam 2041 and two groups of longitudinal beams 2042. The bottom beam 2041 is provided with two groups of longitudinal beams 2042. The bottom of one group of longitudinal beams 2042 is fixed with a spring 2043, and the spring 2043 is fixed to the bottom beam 2041. This group of longitudinal beams 2042 is fixed to the high end of the feeding plate 201.

[0049] The bottom of the other group of longitudinal beams 2042 is fixed with a rubber column 2044 and a sliding block 2045. The corresponding bottom beam 2041 is fixed with a square sleeve 2046 and a vibrating machine 2047. The sliding block 2045 is arranged in the square sleeve 2046 and is in sliding connection with the square sleeve 2046. The vibrating machine 2047 is installed at the bottom of the square sleeve 2046 for vibrating the sliding block 2045. This group of longitudinal beams 2042 is fixed to the low end of the feeding plate 201.

[0050] The top plate 202 is fixed by four longitudinal beams 2042.

[0051] In this embodiment, the rubber column 2044 is a rubber pad, which can reduce the noise generated by the device during vibration. By limiting the use of the sliding block 2045 and the square sleeve 2046, the device can operate for a longer period of time, and the vibration machine 2047 can be protected, thereby prolonging the service life of the vibration machine 2047.

[0052] In an alternative embodiment, the separating member 205 includes two groups of scraping teeth 2051 and a balance frame 2052 fixedly connected to the two groups of scraping teeth 2051.

[0053] In this embodiment, the balance frame 2052 is used to fixedly connect the two groups of scraping teeth 2051, so that the two groups of scraping teeth 2051 are distributed according to the inclination angle of the blanking plate 201.

[0054] In an alternative embodiment, one of the eddy current sorting machines has a balance frame 2052 fixedly installed on the longitudinal beam 2042, and the blanking plate 201 corresponds to an outlet for sand material greater than 40 mm.

[0055] In this embodiment, when the balance frame 2052 is installed on the longitudinal beam 2042, the vibration machine 2047 vibrates with the blanking plate 201 and the longitudinal beam 2042, and the scraping teeth 2051 and the balance frame 2052 can vibrate simultaneously. In this process, sand material greater than 40 mm is dispersed by vibration, and the dispersed sand material hits the scraping teeth 2051, so that the aluminum metal wrapped therein can be better separated from the sand material.

[0056] In an alternative embodiment, the other two eddy current sorting machines have balance frames 2052 fixedly installed on the bottom beam 2041, and the blanking plate 201 corresponds to 75 μm-3 mm sand material and 3 mm-40 mm sand material, respectively.

[0057] In this embodiment, small-diameter sand material generally has a high water content, and the water content is not easy to remove. Therefore, during vibration, the blanking plate 201 frequently moves away from and approaches the scraping teeth 2051, so that the scraping teeth 2051 can disperse the agglomerated small-particle sand material, and the dispersed sand material can be better dried by hot air. The hot air can act on the small-particle sand material, and the removal rate is also higher during subsequent aluminum metal removal.

[0058] In an alternative embodiment, the blanking plate 201 and the top plate 202 are each provided with a plurality of air holes 206, the drying assembly 203 includes a closed cover 2031 and a dry hot air pipe 2032, the closed cover 2031 covers the air holes 206, and the dry hot air pipe 2032 is in communication with the inside of the closed cover 2031.

[0059] In this embodiment, the external wind is blown into the dry hot air pipe 2032, and the wind is concentrated in the closed cover 2031, and then acts on the sand from the air hole 206 in the closed cover 2031. The diameter of the air hole 206 is small, generally smaller than the diameter of the sand, and does not affect the outflow of the wind.

[0060] In an optional embodiment, the scraping teeth 2051 are pointed at one end of the high end of the discharging plate 201, and each group of scraping teeth 2051 is a plurality of equidistantly distributed groups, and the two groups of scraping teeth 2051 are staggered.

[0061] In this embodiment, the scraping teeth 2051 are covered with alloy wear-resistant materials, and are not easy to wear in a large area when in contact with sand for a long time. The staggered scraping teeth 2051 can better scatter the materials.

[0062] In use, different diameters of the slag can be divided into different eddy current sorting machines for processing. The drying and dispersing vibration equipment 2 can dry the slag, and use the scraping teeth 2051 and vibration to disperse the slag containing water. When the slag containing water and having a small particle diameter is dispersed, the discharging plate 201 vibrates and impacts the scraping teeth 2051, which can better disperse the slag. When the particle diameter is large and the water content is low, the scraping teeth 2051 can be directly used to disperse. After the dispersion and drying, the subsequent sorting equipment 1 can more completely pick out the aluminum slag inside.

[0063] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification.

[0064] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, also not within the scope of protection required by the present application.

[0065] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An aluminum metal extraction system for waste incineration slag, characterized in that: It includes a primary dewatering screen and a secondary dewatering screen. After the primary dewatering screen separates the 32μm-75μm water-sand mixture, the remaining slag is transferred to the secondary dewatering screen, which then separates the slag into 75μm-3mm sand, 3mm-40mm sand and sand larger than 40mm. It also includes three sets of eddy current separators, which are used to process three different sizes of sand. The eddy current separators all include a separation device (1) and a drying and dispersing vibration device (2). The drying and dispersing vibration device (2) is installed at the feed end of the separation device (1) and is used to receive the discharge from the secondary dewatering screen and to separate and dewater the received sand. The drying and dispersing vibration device (2) includes a feeding plate (201), a top plate (202), and a drying assembly (203). The feeding plate (201) is inclined and divided into a high end and a low end. The top plate (202) is horizontally set and located above the feeding plate (201). The top plate (202) and the feeding plate (201) are suspended and fixed. The drying assembly (203) has two sets, which are respectively installed on the upper surface of the top plate (202) and the bottom surface of the feeding plate (201) to transfer hot dry air between the feeding plate (201) and the top plate (202). The drying and dispersing vibration device (2) further includes a vibrating element (204) and a separating element (205). The vibrating element (204) is used to install the feeding plate (201) and the top plate (202) and cause them to vibrate. The separating element (205) is located between the top plate (202) and the feeding plate (201). The vibrating component (204) includes a bottom beam (2041) and two sets of longitudinal beams (2042). There are two bottom beams (2041). A spring (2043) is fixed to the bottom of one set of longitudinal beams (2042). The spring (2043) is fixed to the bottom beam (2041). The set of longitudinal beams (2042) is fixed to the high end of the feed plate (201). Another set of longitudinal beams (2042) has a rubber column (2044) and a slider (2045) fixed at the bottom. A square sleeve (2046) and a vibrator (2047) are fixed on the corresponding bottom beam (2041). The slider (2045) is located inside the square sleeve (2046) and is slidably connected to it. The vibrator (2047) is installed at the bottom of the square sleeve (2046) to vibrate the slider (2045). This set of longitudinal beams (2042) is fixed to the bottom of the feed plate (201). The top plate (202) is fixed together by four longitudinal beams (2042); The separating component (205) includes two sets of scraping teeth (2051) and a balance frame (2052) that is fixedly connected to the two sets of scraping teeth (2051). One of the eddy current separators has its balance frame (2052) fixedly installed on the longitudinal beam (2042), and the feed plate (201) corresponds to the sand outlet with a diameter greater than 40mm; The other two eddy current separators have their balance frames (2052) fixedly installed on the bottom beam (2041), and the feed plates (201) correspond to 75μm-3mm sand and 3mm-40mm sand, respectively.

2. The aluminum metal extraction system for waste incineration slag according to claim 1, characterized in that: The feeding plate (201) and the top plate (202) are provided with a number of air holes (206). The drying component (203) includes a closed cover (2031) and a hot dry air pipe (2032). The closed cover (2031) covers the air holes (206), and the hot dry air pipe (2032) is connected to the inside of the closed cover (2031).

3. The aluminum metal extraction system for waste incineration slag according to claim 2, characterized in that: The scraper teeth (2051) have a pointed end facing the high end of the feed plate (201). Each set of scraper teeth (2051) consists of multiple teeth that are evenly distributed, and the two sets of scraper teeth (2051) are staggered.

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