CN218854558U - Metal slag sorting system - Google Patents

Abstract

The utility model discloses a metal slag sorting system, it relates to metal recovery processing technology field, include: the device comprises a feeding system, a primary screening, crushing and magnetic separation system, a primary grinding system, a magnetic metal slag dry processing system, a non-magnetic metal slag wet processing system and a sludge processing system; the feeding system is used for loading the metal slag and carrying out primary screening so as to screen out and crush the large metal slag and form qualified metal slag output; the primary screening, crushing and magnetic separation system is used for magnetically attracting qualified metal slag to obtain part of magnetic metal in the metal slag, screening the magnetically attracted metal slag, storing the screened metal slag into a storage bin, crushing blocky metal slag which cannot pass through screening, and storing the crushed metal slag into the storage bin; the primary grinding system comprises: wet and dry rod mills, and the like. The application can solve the problem that the existing metal slag sorting system is single and cannot take magnetic and non-magnetic metal slag into consideration.

Description

Metal slag sorting system

Technical Field

The utility model relates to a metal recovery processing technology field, in particular to metal slag sorting system.

Background

The metal content in the metal slag generally needs to be more than 10 percent, and the metal slag has the value and the economic benefit of special sorting and recycling. Typically, for example, steel slag, copper slag, vanadium slag, etc., but for example, granulated blast furnace slag has low metal content and thus does not have the value of sorting and recovering metals.

Currently, the separation of the metal slag is mostly divided into two methods: one method aims at magnetic slag, generally adopts the steps of crushing, screening, grinding, magnetic separation and the like, and the magnetic slag separation process is mature, simple, low in production cost and high in processing capacity. The methods generally differ in the number, sequence and whether the process is closed loop, of crushing, screening, grinding, magnetic separation. The other method is directed at non-magnetic slag, and the separation method of the non-magnetic slag is more, and comprises the separation of a dry method and a wet method, and also comprises the separation of gravity separation and magnetic separation. The first half of the process generally adopts the similar crushing, screening and grinding processes of the magnetic slag separation method, and the second half of the process adopts the gravity separation and strong magnetic separation processes and also adopts the metal detection process and the like because the metal slag has no magnetism or weak magnetism. The separation method of the non-magnetic slag is long, the process is complicated, the production cost is high, and the processing capacity is low.

The metal slag sorting system in the prior art does not take magnetic and non-magnetic metal slag into consideration at first, and then the process route of the non-magnetic metal slag is too simple and easy, low in processing capacity and poor in environmental protection effect, or the equipment technology adopted by the process route is immature and needs to be imported, and the yield of the other process route is low, so that part of metal resources are wasted. Therefore, there is a need for a metal slag separation system that can simultaneously achieve both magnetic and non-magnetic metal slag separation, thereby reducing cost and providing versatility to the metal slag separation system.

Interpretation of key terms

Metal slag: the slag containing a small amount of metal is remained after the metal is extracted through a smelting process.

Magnetic and non-magnetic: the method is to determine whether the metal in the metal slag can be separated by a magnetic separator.

Dry method and wet method: which means whether circulating water is used for treatment in the metal slag sorting system.

Slurry slag: which refers to a mixture of slag and water when the metal slag adopts a wet processing system.

Tailings: the method refers to the residual slag after metal is extracted from the metal slag.

Mud cake: refers to tailings after wet processing.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned defect of prior art, the embodiment of the utility model provides a technical problem that will solve provides a dross sorting system, and its unicity that can solve present dross sorting system can't compromise the condition of magnetism and non-magnetic dross.

The embodiment of the utility model provides a concrete technical scheme is:

a dross sorting system, comprising:

the device comprises a feeding system, a primary screening, crushing and magnetic separation system, a primary grinding system, a magnetic metal slag dry processing system, a non-magnetic metal slag wet processing system and a sludge processing system;

the feeding system is used for loading the metal slag and carrying out primary screening so as to screen out and crush the large metal slag and form qualified metal slag output;

the primary screening, crushing and magnetic separation system is used for magnetically attracting qualified metal slag to obtain part of magnetic metal in the metal slag, screening the magnetically attracted metal slag, storing the screened metal slag into a storage bin, crushing blocky metal slag which cannot pass through screening, and storing the crushed metal slag into the storage bin;

the primary grinding system comprises: the dry-wet rod mill can receive the metal slag output by the storage bin, and when the metal slag output by the storage bin is magnetic metal slag, the dry-wet rod mill is selected; when the metal slag output by the storage bin is non-magnetic metal slag, the wet rod mill is selected as the dry-wet rod mill;

the magnetic metal slag dry processing system comprises: the second vibrating screen is used for screening the metal slag treated by the dry and wet rod mill selected from the dry rod mill; the primary screening, crushing and magnetic separation system is used for receiving residual materials on the second vibrating screen after being separated by the second magnetic machine;

the non-magnetic metal slag wet processing system comprises: the washing vibrating screen is used for screening the metal slag treated by the wet and dry rod mill and the wet rod mill, and bulk metal is obtained from the washing vibrating screen; a spiral classifier having an inlet for receiving material under the sieve of the water-washed vibrating screen, the spiral classifier for separating the material into overflow and settled sand; the shaking table is used for processing the overflow to obtain metal powder, and tailings formed after processing are input into the sludge treatment system; the inlet of the wet ball mill receives the settled sand, and the wet ball mill is used for carrying out secondary ore grinding on the settled sand to obtain a ball-milled product; and the inlet of the cylindrical sieve is connected with the outlet of the wet ball mill, the cylindrical sieve is used for sieving ball-milled products to obtain granular metals from the sieve of the cylindrical sieve, and undersize materials of the cylindrical sieve are conveyed to the shaking table.

Preferably, the primary screening, crushing and magnetic separating system comprises: a belt conveyor for conveying the qualified metal slag; the first belt magnetic machine is positioned above the belt conveyor and is used for separating out part of magnetic metal in the metal slag on the belt conveyor; a first vibrating screen located at the belt conveyor outlet; a crusher for crushing the lumpy metallic slag that cannot pass through the first vibrating screen; and the inlet of the storage bin receives the metal slag after passing through the first vibrating screen and the metal slag after being crushed by the crusher.

Preferably, the crusher is a hydraulic jaw crusher, and the crushing performance of the hydraulic jaw crusher is to crush the massive metal slag to a particle size of 70mm.

Preferably, the magnetic metal slag dry processing system further comprises: and the dry magnetic separator is used for magnetically attracting the metal slag passing through the second vibrating screen to obtain magnetic powdery metal.

Preferably, the feeding system comprises: the front end loader can load metal slag on the tiltable grid sieve of the feeding station, and the tiltable grid sieve can sieve out large metal slag; and forming qualified metal slag from the metal slag passing through the inclinable grid sieve.

Preferably, the wet ball mill is a wet lattice ball mill, the particle size of the feed material to the wet lattice ball mill is 10mm or less, and the particle size of the discharge material from the wet lattice ball mill is 0.8mm or less.

Preferably, the particle size of the fed material of the dry-wet dual-purpose rod mill is less than or equal to 70mm, and the particle size of the discharged material of the dry-wet dual-purpose rod mill is less than or equal to 5mm.

Preferably, the sludge treatment system comprises: a cyclone for receiving the tailings after innocent treatment; and the dewatering screen is connected with the underflow outlet of the cyclone.

Preferably, the sludge treatment system further comprises: the concentration unit can be communicated with an overflow outlet of the cyclone and an undersize liquid outlet of the dewatering screen;

a sedimentation tank communicable with an overflow outlet of the concentration unit;

a compression unit in communication with the underflow outlet of the concentration unit.

Preferably, the clear water outlet of the sedimentation tank can be communicated with the non-magnetic metal slag wet processing system.

The technical scheme of the utility model following beneficial effect that is showing has:

1. this application has been taken into account and has been handled magnetic metal sediment and non-magnetic metal sediment, utilizes same processing line, through switching between magnetic metal sediment dry processing system and the non-magnetic metal sediment wet processing system can realize the adaptability to the product under the different market conditions.

2. Adopt closed loop to handle to magnetic metal sediment in this application, can make metal and sediment abundant separation through the rod mill that relapses, grinding metal sediment, improve metal purity, improve the metal yield.

3. The combined process of crushing treatment, rod milling treatment and ball milling treatment is adopted for the nonmagnetic metal slag in the application, the condition of uneven granularity can be solved in the crushing process, the metal slag can be treated by the rod milling with larger capacity, part of metal in the metal slag is extracted, the capacity pressure of subsequent ball milling is reduced, the metal and the slag can be further separated by the ball milling, and the yield and the purity are improved.

4. The spiral classifier is adopted in the roughing stage of the non-magnetic metal slag, and the advantage of high processing capacity is achieved.

5. In the application, a shaking table mode is adopted at the selection stage of the non-magnetic metal slag, so that the metal yield can be improved, and the resource is not wasted.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art with the benefit of the teachings of this invention can select various possible shapes and proportional dimensions to implement the invention depending on the specific situation.

FIG. 1 is a schematic diagram of a metal slag separation system in the embodiment of the utility model.

Reference numerals of the above figures:

Detailed Description

The details of the present invention can be more clearly understood with reference to the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of explanation only, and should not be construed as limiting the invention in any way. Given the teachings of the present invention, the skilled person can conceive of any possible variants based on the invention, which should all be considered as belonging to the scope of the invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, 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 application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The smelting enterprises have the situations of low-added-value magnetic slag and non-magnetic slag, for example, some enterprises can produce magnetic metal in a period of time and produce non-magnetic metal in another period of time according to market conditions, so that a metal slag sorting system and a sorting method are required to be suitable for different metal slags, and because the added value of part of the magnetic slag is low, if the non-magnetic metal slag production line is used for processing the magnetic slag, the production cost is high, and loss is caused.

In order to solve the unicity of present dross system of selecting separately, can't compromise the condition of magnetism and non-magnetic dross, provided a dross system of selecting separately in this application, fig. 1 is the embodiment of the utility model provides an in the embodiment of the utility model provides a dross system of selecting separately's schematic diagram, as shown in fig. 1, dross system of selecting separately can include: the device comprises a feeding system, a primary screening, crushing and magnetic separation system, a primary grinding system, a magnetic metal slag dry processing system, a non-magnetic metal slag wet processing system and a sludge processing system.

As shown in fig. 1, the feeding system is used for loading and primarily screening the metal slag, so as to screen out and crush the large metal slag and form qualified metal slag output. As a possibility, the feeding system may comprise: a front end loader, a feeding station with a tiltable grid. The front end loader can load the metal slag onto the tiltable grid sieve of the feeding station, and the tiltable grid sieve can sieve out large metal slag; and forming qualified metal slag from the metal slag passing through the inclinable grid sieve. The front end loader can also be replaced with a grab crane. The large metal slag on the tiltable grid sieve can be turned to one side of the side through the tilting of the tiltable grid sieve, then is crushed manually by using a drop hammer crushing mode, and the crushed metal slag is loaded on the tiltable grid sieve of the feeding station. The large metal blocks on the tiltable grid screen can be directly screened out. And a collecting device can be arranged below the tiltable grid sieve and used for storing the metal slag which is primarily sieved by the tiltable grid sieve. And the outlet of the collecting device is provided with a vibrating feeder to output the metal slag in the collecting device.

As shown in figure 1, the primary screening, crushing and magnetic separating system is matched with an outlet below the tiltable grid screen, such as a vibrating feeder at an outlet of the collecting device, so as to receive the output metal slag. The primary screening, crushing and magnetic separation system is used for magnetically attracting qualified metal slag to obtain partial magnetic metal in the metal slag, screening the magnetically attracted metal slag, storing the screened metal slag to a storage bin, crushing the blocky metal slag which cannot pass through screening, and storing the crushed metal slag to the storage bin.

The primary screening, crushing and magnetic separating system can comprise: the belt conveyor is used for conveying the qualified metal slag and can be positioned below an outlet of the vibrating feeder; the first belt magnetic machine is positioned above the belt conveyor and is used for separating out part of magnetic metal in the metal slag on the belt conveyor; a first vibrating screen located at the belt conveyor outlet; a crusher for crushing the lumpy metallic slag that cannot pass through the first vibrating screen; and the inlet of the storage bin receives the metal slag after passing through the first vibrating screen and the metal slag after being crushed by the crusher. The first magnetizing machine is used for selecting larger metal with magnetism from the metal slag on the belt conveyor, and the missing metal blocks can be selected manually.

Furthermore, the crusher is a hydraulic protection jaw crusher, and the crushing performance of the hydraulic protection jaw crusher can crush the blocky metal slag to a granularity of less than or equal to 70mm. Because the dry-wet rod mill in the subsequent steps has strict requirements on the granularity of the fed material, the granularity of the fed material is not more than 70mm, otherwise the grinding medium steel rod is easy to have rod disorder. Therefore, the aim of coarse crushing in a primary screening, crushing and magnetic separating system is needed. Since the metal slag contains large pieces of metal, the particle size of which may be greater than 70mm, hydraulic jaw crushing is required. When the biting force is larger than a certain degree, the hydraulic protection can automatically release the bulk metal without forcing the bulk metal to be crushed, thereby avoiding the damage of the jaw crusher.

As shown in fig. 1, the primary grinding system may include: the dry-wet rod mill can receive the metal slag output by the storage bin, and when the metal slag output by the storage bin is magnetic metal slag, the dry-wet rod mill is selected; and when the metal slag output by the storage bin is non-magnetic metal slag, the wet-dry rod mill is selected as the wet rod mill. The inlet of the dry-wet rod mill can be matched and butted with the outlet of the storage bin. The particle size of the fed material of the dry-wet dual-purpose rod mill is less than or equal to 70mm, and the particle size of the discharged material of the dry-wet dual-purpose rod mill is less than or equal to 5mm. The metal slag can be ground to the corresponding particle size by a dry-wet rod mill.

As shown in figure 1, a feeding port of the magnetic metal slag dry processing system can be matched and butted with an outlet of a dry-wet rod mill. The magnetic metal slag dry processing system can comprise: the second vibrating screen is used for screening the metal slag treated by the dry and wet rod mill selected from the dry rod mill; and the second magnetic machine is positioned above the second vibrating screen and used for separating the magnetic blocky metals on the second vibrating screen, and the primary screening, crushing and magnetic separation system receives the residual materials separated by the second magnetic machine on the second vibrating screen. The inlet of the second vibrating screen can be matched and butted with the outlet of the wet-dry dual-purpose rod mill.

As a possibility, the magnetic metal slag dry processing system may further include: and the dry magnetic separator is used for magnetically attracting the metal slag passing through the second vibrating screen to obtain magnetic powdery metal. For example, the magnetic powdered metal may include a powdered slag iron. Magnetically attracting the residual metal slag through a dry magnetic separator to form tailings.

As shown in FIG. 1, the inlet of the non-magnetic metal slag wet processing system can be matched and butted with the outlet of a dry-wet rod mill. The non-magnetic metal slag wet processing system may include: the washing vibrating screen is used for screening the metal slag treated by the wet and dry rod mill and the wet rod mill, and bulk metal is obtained from the washing vibrating screen; the inlet of the spiral classifier receives the materials screened by the washing vibrating screen, and the spiral classifier is used for separating the materials into overflow and settled sand; the shaking table is used for processing the overflow to obtain metal powder, and tailings formed after processing are input into the sludge treatment system; the inlet of the wet ball mill receives the settled sand, and the wet ball mill is used for carrying out secondary ore grinding on the settled sand to obtain a ball-milled product; and the inlet of the cylindrical sieve is connected with the outlet of the wet ball mill, the cylindrical sieve is used for sieving ball-milled products to obtain granular metals from the sieve of the cylindrical sieve, and undersize materials of the cylindrical sieve are conveyed to the shaking table. The inlet of the water washing vibrating screen can be matched and butted with the outlet of the dry-wet dual-purpose rod mill. The settled sand divided by the spiral classifier can enter a buffer bin for storage. The inlet of the shaking table can be butted with the overflow outlet of the spiral classifier and the outlet under the screen of the cylindrical screen. The inlet of the wet ball mill can be matched and butted with the outlet of the buffer bin, the wet ball mill is a wet lattice type ball mill, the feeding granularity of the wet lattice type ball mill is less than or equal to 10mm, and the discharging granularity of the wet lattice type ball mill is less than or equal to 0.8mm. The wet type lattice ball mill can achieve the purpose of fine final grinding grain size. The non-magnetic metal slag wet processing system solves the problem of low processing capacity of the non-magnetic metal slag at present, can achieve the purpose of fine selection, improves the grade of recovered metal, can fully recover useful metal in the metal slag, and avoids waste.

Aiming at the non-magnetic metal slag, the hydraulic protection crusher is adopted for coarse crushing, then the wet rod mill of the dry and wet rod mill and the wet ball mill are used for carrying out the combined process of ball milling, the hydraulic protection crusher has the largest capacity, the capacity of the dry and wet rod mill is the smallest, partial metal can be sorted out through one device, and therefore the pressure of subsequent process devices is reduced, and the capacity is improved. The mode of combining the spiral classifier and the shaking table is adopted, the spiral classifier has high capacity, is suitable for front-stage treatment and rough treatment, has low yield of the shaking table and high metal selection yield, and is suitable for rear-stage treatment and treatment after grinding. And both the two devices have the advantages of low manufacturing cost and easy maintenance.

As a feasible matter, the outlet of the wet and dry rod mill can be connected with the inlets of the magnetic metal slag dry processing system and the nonmagnetic metal slag wet processing system through the rotary feeder, and the magnetic metal slag dry processing system and the nonmagnetic metal slag wet processing system can be switched conveniently through the rotary feeder.

As a possibility, the sludge treatment system may comprise: a cyclone for receiving the tailings after innocent treatment; and the dewatering screen is connected with the underflow outlet of the cyclone. And treating the underflow output by the cyclone through a dewatering screen to obtain coarse-grained tailings, and outputting screened underflow outwards. The overflow outlet of the cyclone also outputs overflow outwards. The sludge treatment system may further include: a concentration unit capable of communicating with an overflow outlet of the cyclone and an undersize liquid outlet of the dewatering screen; a sedimentation tank communicable with an overflow outlet of the concentration unit; a compression unit in communication with the underflow outlet of the concentration unit. The concentration unit may be a concentration tank or a concentration tower in which dosing is performed for flocculation settling. The overflow of the concentration unit enters a sedimentation tank, the underflow of the concentration unit enters a compression unit for compression and filtration to produce mud cakes, the mud cakes are transported to a finished product warehouse by a forklift for piling and transporting out, and the return water generated in the compression and filtration process enters the sedimentation tank. The compression unit can adopt a plate-and-frame filter press, a vacuum belt filter press, a vacuum disc filter, a cylindrical vacuum filter and the like. And a clear water outlet of the sedimentation tank can be communicated with the non-magnetic metal slag wet processing system to supply water for the non-magnetic metal slag wet processing system. The sludge outlet of the sedimentation tank can be communicated with the inlet of the cyclone so as to reenter the sludge treatment system. By adopting the mode, an environment-friendly and industrialized treatment route is adopted for the tailings, and the pollution caused by heavy metal overflow is avoided.

The operation process of the metal slag sorting system comprises the following steps:

and (3) primarily screening the metal slag to screen out and crush the large metal slag, and forming qualified metal slag for output.

The metal slag can be divided into magnetic metal slag and non-magnetic metal slag, wherein the magnetic metal slag is mainly magnetic metal slag in the known metal slag and is mainly treated by the magnetic metal slag. The non-magnetic metal slag refers to the known metal slag with most non-magnetic metal slag, and is mainly treated by the non-magnetic metal slag.

In the steps, the metal slag can be loaded into a feeding station with a tiltable grid sieve through a front end loader or a grab crane, the tiltable grid sieve is utilized to sieve out large metal slag, and the large metal slag is manually crushed, so that qualified metal slag output is formed. In this process, large pieces of metal are sieved through the tiltable grid. The large metal slag on the tiltable grid sieve can be turned to one side of the tiltable grid sieve through the turning of the tiltable grid sieve, then the large metal slag is crushed manually by using a drop hammer crushing mode, and the crushed metal slag is loaded on the tiltable grid sieve of the feeding station. The large metal blocks on the tiltable grid screen can be directly screened out. And a collecting device can be arranged below the tiltable grid sieve, and qualified metal slag screened by the tiltable grid sieve is output to the collecting device.

And carrying out primary screening, crushing and magnetic separation treatment on the qualified metal slag. The primary screening, crushing and magnetic separation treatment can comprise the following steps: the qualified metal slag is magnetically attracted to obtain part of magnetic blocky metal in the metal slag, the magnetically attracted metal slag is screened, the screened metal slag is stored in a storage bin, the blocky metal slag which cannot pass through screening is crushed, and the crushed metal slag is stored in the storage bin.

In the above steps, the qualified metal slag can be conveyed by a belt conveyor, and during the conveying process, a part of magnetic metal in the metal slag on the belt conveyor is separated by a first belt magnet machine positioned above the belt conveyor; simultaneously, the missing blocky metal can be selected out in a manual screening mode. Preferably, the blocky metal slag which cannot pass the screening is crushed by a crusher, the crusher can be a hydraulic protective jaw crusher, and the particle size of the metal slag crushed by the crusher is less than or equal to 5mm. Because the dry-wet rod mill in the subsequent steps has strict requirements on the granularity of the fed materials, the granularity of the fed materials is not more than 70mm, otherwise the grinding medium steel rods are easy to be disordered, and the granularity of the metal slag stored in the storage bin after being crushed is basically less than or equal to 70mm.

When the metal slag stored to the storage bin is magnetic metal slag, selecting dry rod grinding for the wet and dry rod grinding machine, and processing the metal slag output by the storage bin to meet the required grade through the dry rod grinding of the wet and dry rod grinding machine. In the process, the dry-wet dual-purpose rod mill can process the discharged material to be less than or equal to 5mm in particle size.

And when the metal slag stored to the storage bin is non-magnetic metal slag, selecting a wet rod mill for the wet and dry rod mill, and processing the metal slag output by the storage bin to a required grade through the wet rod mill of the wet and dry rod mill. In the process, the dry-wet dual-purpose rod mill can process the discharged material to be less than or equal to 5mm in particle size.

And (3) carrying out dry treatment on the metal slag treated by a dry-wet rod mill selected from a dry rod mill. The dry process may include: screening the metal slag treated by the dry and wet rod mill selected from the dry rod mill by using a second vibrating screen, selecting the magnetic blocky metal on the second vibrating screen by using a second magnetic machine positioned above the second vibrating screen, and performing primary screening, crushing and magnetic separation treatment on the residual material on the second vibrating screen after being selected by the second magnetic machine.

Further, the dry processing may further include: and magnetically attracting the metal slag passing through the second vibrating screen to obtain magnetic powdery metal, wherein the magnetically attracted metal slag forms tailings.

And (3) carrying out wet treatment on the metal slag treated by a dry-wet rod mill adopting a wet rod mill. The wet processing may include: screening the metal slag treated by the wet and dry rod mill by using a washing vibrating screen to obtain blocky metal; separating the materials under the washing vibrating screen into overflow and settled sand by a spiral classifier; treating the overflow by using a shaking table to obtain metal powder, and inputting tailings formed after the treatment by using the shaking table into a sludge treatment system for treatment; performing secondary ore grinding on the settled sand by using a wet ball mill to obtain a ball-milled product; and screening the ball-milled product through a cylindrical screen, obtaining granular metal from the screen of the cylindrical screen, and conveying the undersize material of the cylindrical screen to the shaking table for further treatment. Similarly, undersize materials of the cylindrical screen are processed through the shaking table to obtain metal powder, and tailings formed after the shaking table processing are input into a sludge processing system to be processed.

In the above steps, the spiral classifier is used for separating the material into overflow and settled sand with the granularity less than or equal to 10 mm. The wet ball mill is a wet lattice ball mill, the feeding particle size of the wet lattice ball mill is less than or equal to 10mm, and the discharging particle size of the wet lattice ball mill is less than or equal to 0.8mm. The purpose of fine final grinding particle size can be achieved by a wet-type lattice ball mill.

As feasible, the sludge treatment system can carry out harmless treatment on the tailings, then dehydrate, thicken and filter-press the tailings to form mud cakes, and then sell the mud cakes to corresponding factories for recycling. The sewage is returned to the wet treatment for recycling. The tailings are input into a sludge treatment system for treatment, and the method specifically comprises the following steps:

adding chemicals into the tailings for harmless treatment. Due to the tailingsThe heavy metal which is generally toxic is Cr ⁶⁺ Optionally adding FeSO ₄ Thereby converting Cr ⁶⁺ Reducing into harmless Cr ³⁺ 。

And (4) inputting the tailings subjected to harmless treatment into a cyclone. The tailings after harmless treatment can be fed into a cyclone through a mortar pump, and underflow and overflow are formed through the cyclone.

And conveying the underflow of the cyclone to a dewatering screen for dewatering to obtain coarse-grained tailings.

The overflow of the cyclone and the undersize liquid of the dewatering screen are concentrated, for example, the overflow of the cyclone and the undersize liquid of the dewatering screen may be first input into a turbid circulating water treatment, and then input into a concentration unit such as a concentration tank or a concentration tower for chemical addition to perform flocculation and sedimentation. At the same time, the concentration unit forms an overflow and an underflow.

And compressing the underflow formed during concentration treatment to form a mud cake, conveying the produced mud cake to a finished product warehouse by a forklift for piling and transporting the mud cake, and feeding return water formed in the compression process into a sedimentation tank.

And inputting the overflow formed in the concentration treatment into a sedimentation tank for sedimentation and separating out clear water and sludge. And carrying out wet treatment on the metal slag treated by a dry-wet rod mill adopting a wet-method rod mill by using the clean water separated from the sedimentation tank. The sludge separated by the sedimentation tank can enter a sludge treatment system again for treatment. The water replenishing in the sedimentation tank can come from turbid circulating water, so that the wastewater is not discharged outside, and the existing wastewater in the plant is effectively utilized.

The application can have the following beneficial effects: 1. the application considers processing magnetic metal slag and non-magnetic metal slag, utilizes the same processing line, and can realize the adaptability to products under different market conditions by switching between the magnetic metal slag dry processing system and the non-magnetic metal slag wet processing system. 2. Adopt closed loop to handle to magnetic metal sediment in this application, can make metal and sediment abundant separation through the rod mill that relapses, grinding metal sediment, improve metal purity, improve the metal yield. 3. The combined process of crushing treatment, rod mill treatment and ball milling treatment is adopted for the non-magnetic metal slag in the application, the condition that the granularity is not uniform can be solved in the crushing process, the rod mill can treat the metal slag with larger capacity, part of metal is extracted out, the capacity pressure of subsequent ball milling is reduced, the metal and the slag can be further separated through the ball milling, and the yield and the purity are improved. 4. The spiral classifier is adopted in the roughing stage of the non-magnetic metal slag, and the advantage of high processing capacity is achieved. 5. In the application, a shaking table mode is adopted for the selection stage of the non-magnetic metal slag, so that the metal yield can be improved, and resources are not wasted. 6. The process of adopting the dewatering screen and the concentration unit and the compression unit in the application to treat the tailings can realize large-scale treatment of the tailings and ensure that sewage does not overflow and produce pollution.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of 8230comprises the elements, components or steps identified and other elements, components or steps which do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the attributes described that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (10)

1. A dross sorting system, comprising:

the device comprises a feeding system, a primary screening, crushing and magnetic separation system, a primary grinding system, a magnetic metal slag dry processing system, a non-magnetic metal slag wet processing system and a sludge processing system;

the feeding system is used for loading the metal slag and carrying out primary screening so as to screen out and crush the large metal slag and form qualified metal slag output;

the primary screening, crushing and magnetic separation system is used for magnetically attracting qualified metal slag to obtain part of magnetic metal in the metal slag, screening the magnetically attracted metal slag, storing the screened metal slag into a storage bin, crushing blocky metal slag which cannot pass through screening, and storing the crushed metal slag into the storage bin;

the primary grinding system comprises: the dry-wet rod mill can receive the metal slag output by the storage bin, and when the metal slag output by the storage bin is magnetic metal slag, the dry-wet rod mill is selected; when the metal slag output by the storage bin is non-magnetic metal slag, the wet-method rod mill is selected as the dry-method rod mill;

the magnetic metal slag dry processing system comprises: the second vibrating screen is used for screening the metal slag treated by the dry-wet rod mill selected from the dry-method rod mill; the primary screening, crushing and magnetic separation system is used for receiving residual materials on the second vibrating screen after being separated by the second magnetic machine;

the non-magnetic metal slag wet processing system comprises: the washing vibrating screen is used for screening the metal slag treated by the wet and dry rod mill and the wet rod mill to obtain blocky metal from the washing vibrating screen; a spiral classifier having an inlet for receiving material under the sieve of the water-washed vibrating screen, the spiral classifier for separating the material into overflow and settled sand; the shaking table is used for processing the overflow to obtain metal powder, and tailings formed after processing are input into the sludge treatment system; an inlet of the wet ball mill receives the settled sand, and the wet ball mill is used for carrying out secondary ore grinding on the settled sand to obtain a ball-milled product; and the inlet of the cylindrical sieve is connected with the outlet of the wet ball mill, the cylindrical sieve is used for sieving ball-milled products, granular metal is obtained from the sieve of the cylindrical sieve, and undersize materials of the cylindrical sieve are conveyed to the shaking table.

2. The dross sorting system of claim 1, wherein the primary sieving, breaking and magnetic separating system comprises: a belt conveyor for conveying the qualified metal slag; the first belt magnetic machine is positioned above the belt conveyor and is used for separating out part of magnetic metal in the metal slag on the belt conveyor; a first vibrating screen located at the belt conveyor outlet; a crusher for crushing the lumpy metallic slag that cannot pass through the first vibrating screen; and the inlet of the storage bin receives the metal slag which passes through the first vibrating screen and the metal slag which is crushed by the crusher.

3. The slag sorting system according to claim 2, wherein the crusher is a hydraulic jaw crusher having crushing performance capable of crushing the metal slag lumps to a size of 70mm.

4. The dross sorting system of claim 1, wherein the magnetic dross dry treatment system further comprises: and the dry magnetic separator is used for magnetically attracting the metal slag passing through the second vibrating screen to obtain magnetic powdery metal.

5. The dross sorting system of claim 1, wherein the feeding system comprises: the front end loader can load metal slag onto the tiltable grid sieve of the feeding station, and the tiltable grid sieve can sieve out large metal slag; and forming qualified metal slag through the metal slag passing through the inclinable grid sieve.

6. The system for sorting metal slag according to claim 1, wherein the wet ball mill is a wet lattice ball mill, a feed particle size of the wet lattice ball mill is 10mm or less, and a discharge particle size of the wet lattice ball mill is 0.8mm or less.

7. The system for sorting the metal slag according to claim 1, wherein the feed particle size of the dry-wet rod mill is less than or equal to 70mm, and the discharge particle size of the dry-wet rod mill is less than or equal to 5mm.

8. The dross sorting system of claim 1, wherein the sludge treatment system comprises: a cyclone for receiving the tailings after innocent treatment; and the dewatering screen is connected with the underflow outlet of the cyclone.

9. The dross sorting system of claim 8, wherein the sludge treatment system further comprises: the concentration unit can be communicated with an overflow outlet of the cyclone and an undersize liquid outlet of the dewatering screen;

a sedimentation tank communicable with an overflow outlet of the concentration unit;

a compression unit in communication with the underflow outlet of the concentration unit.

10. The system for sorting the metallic slag according to claim 9, wherein the clear water outlet of the sedimentation tank is capable of communicating with the non-magnetic metallic slag wet processing system.

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