CN101862810A - A kind of foundry old sand, slag recovery processing equipment - Google Patents

Abstract

The invention discloses a casting used sand and slag recycling and processing equipment, which is provided with a feeding device (1), a screening device (2), a recycled sand recycling device (13), a slag and iron material recycling device (11), and a dust removal device ( 3); the described screening device (2), regenerated sand recovery device (13), and slag iron material recovery device (11) are closed by the same cover body, and the described cover body is connected with the dust removal air duct (9) The dust removal device (3) is connected. By adopting the above technical scheme, the automation of waste sand and slag treatment is realized, the labor intensity of workers is reduced, and the production efficiency is high; various waste sand and slag are fully recovered and reused, costs are reduced, energy is saved, and resources are fully utilized. Reducing or avoiding the discharge of dust pollutants can fully ensure the reduction or control of dust pollution to the atmospheric environment.

Description

A kind of foundry old sand, slag recovery processing equipment

technical field

The invention belongs to the technical field of thermal processing of engineering materials, and relates to metal material casting process equipment. More specifically, the invention relates to a recycling and processing equipment for casting old sand and slag.

Background technique

At present, the foundry industry is developing rapidly, and related resources such as molding sand are becoming more and more tense or in short supply; human awareness of environmental protection has generally increased, and the working environment of used sand or slag treatment in the foundry industry has serious dust pollution.

At present, the main problems in the treatment of waste sand in the foundry industry are:

A considerable part of the old sand and slag produced by foundry enterprises are only manually sorted. The slag iron content in the slag is generally about 5% to 20%, and the shape and size are different. The slag is mixed with sulfide, slag iron, etc., and the shape is irregular and full of thorns and burrs. Only large pieces or burrs can be cleaned manually. Small pieces on the surface of the slag body that cannot be cleaned thoroughly. After manual cleaning, there are still 3% to nearly 20% (a few or even more than 20%) of the slag and iron in the slag lost to landfill; and although the old sand has been manually cleaned, 2% to nearly 10% of the slag and iron are still lost. It directly leads to resource loss and waste. Manual processing has a lot of dust and serious environmental pollution. The efficiency of artificial daily cleaning is not high, and the daily processing capacity is about 2 tons. Moreover, the ash content of the regenerated sand obtained in this way has not been effectively treated, and its quality is difficult to guarantee.

In order to reduce the waste of resources, some enterprises adopt semi-automatic equipment to process waste sand and slag. Although slag and iron can be recovered well, the labor intensity of workers is high, and the dust generated at the same time is greater, which leads to aggravated environmental pollution.

According to the search of patents and technical literature, there is currently no relevant special equipment in China, which can not only realize the efficient separation of iron slag and old sand, but also reduce or reduce the emission of dust pollutants.

Contents of the invention

The problem to be solved by the present invention is to provide a recycling and processing equipment for used foundry sand and slag, the purpose of which is to realize the full recovery and reuse of used foundry sand and slag, and reduce the pollution to the environment.

In order to achieve the above object, the technical scheme that the present invention takes is:

The used foundry sand and slag recovery treatment equipment provided by the present invention, the recovery treatment equipment is equipped with a feeding device, a screening device, a recycled sand recovery device, a slag iron material recovery device, and a dust removal device; the screening The device, regenerated sand recovery device, and iron slag recovery device are closed by the same cover body, and the cover body communicates with the dust removal device through the dust removal air duct.

In order to better realize the purpose of the invention, the present invention further provides the following detailed technical solutions, which fully embodies the novelty and creativity of the present invention.

1. The structure of the above-mentioned foundry old sand and slag recovery and treatment equipment is as follows:

The feeding device is a bucket elevator, and the bucket elevator inlet and the bucket elevator outlet are respectively located below and above the bucket elevator;

The sieve body of the screening device is a polygonal pyramid with a polygonal cross section, and the side of the pyramid is a screen structure; the pyramid is arranged horizontally, and the generatrices at the bottom are arranged horizontally;

The discharge port of the bucket elevator communicates with the large end opening of the pyramid;

The regenerated sand recovery device is located below the screening device, and the reclaimed sand recovery device is provided with a sand storehouse. The sand storehouse is in the shape of a bucket with a large upper part and a smaller lower part, and its lower opening is the outlet of the stocked sand;

The inclined conduit structure of the slag iron recycling device, the upper port of the conduit structure communicates with the small end opening of the pyramid.

2. Technical measures to improve the crushing effect of old sand and slag:

A crushing hammer head is set inside the sieve body of the screening device; or a crushing grinding body is set inside the sieve body of the sieving device.

3. The structure of the dust removal device:

The dust removal device is a negative pressure bag dust collector driven by the induced draft fan of the dust collector.

4. The structure of the bucket elevator:

The upper and lower ends of the bucket elevator are respectively equipped with rotating shafts. The upper rotating shaft drives the conveying belt through the bucket elevator motor and the reduction mechanism, and the conveying belt is driven by the pulleys on the upper and lower rotating shafts. A plurality of small hoppers are fixedly installed, and the conveying belt realizes fast upward and vertical conveying of materials through the small hoppers during uninterrupted operation.

5. Anti-dust pollution structure of bucket elevator:

The outside of the bucket elevator is a closed cover.

6. Screen body structure of screening device:

The screening device is a hexagonal screen, that is, the cross section of the screen body of the screening device is a regular hexagon.

The present invention adopts above-mentioned technical scheme, compares with prior art, has following advantage:

The automation of waste sand and slag treatment is realized, which not only reduces the labor intensity of workers, improves the working environment, protects the health of workers, but also has high production efficiency; realizes the full recovery and reuse of various waste sand and slag, so as to reduce costs and save Energy and resources are fully utilized; the regenerated sand after dust removal treatment has uniform particle size, low ash content, and low cohesiveness, which fully guarantees the quality of reclaimed sand; and the uniformly crushed slag is an ideal raw material for building materials, broken iron The material is also recycled and reused, which makes full use of resources, and will not affect the environment due to the stacking of slag, which further protects the environment; the dust removal device is used to fully absorb and collect the dust generated during the waste sand treatment process, reducing or Avoiding the discharge of dust pollutants can fully ensure the reduction or control of dust pollution to the atmospheric environment. Therefore, the technical solution of the present invention has outstanding substantive features, and has achieved remarkable technical progress, and has the value of promotion and application in the industry.

Description of drawings

The following is a brief description of the content expressed in the drawings of this manual and the marks in the drawings:

Fig. 1 is a structural representation of the present invention;

FIG. 2 is a schematic side view of the structure shown in FIG. 1 .

Labeled in the figure:

1. Feeding device, 2. Screening device, 3. Dust removal device, 4. Bucket elevator inlet, 5. Bucket elevator outlet, 6. Bucket elevator motor, 7. Hexagonal screen motor , 8, Dust collector induced fan, 9, Dust removal duct, 10, Dust collector dust outlet, 11, Slag iron recovery device, 12, Stock sand outlet, 13, Reclaimed sand recovery device, 14, Dust collector vent.

Detailed ways

Referring to the accompanying drawings, through the description of the embodiments, the specific implementation of the present invention, such as the shape, structure, mutual position and connection relationship between the various parts, the function and working principle of each part, and the manufacturing process And the method of operation and use, etc., are described in further detail to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

The structure of the present invention as shown in Fig. 1 and Fig. 2, the present invention is a kind of foundry old sand, slag recovery processing equipment, widely applicable to the production of ordinary gray iron, cast steel casting and wear-resistant medium products, is the casting produced Special equipment for recycling and reusing old sand and slag.

In order to solve the problems existing in the current known technology described in the background technology section of this specification and overcome its defects, realize the full recovery and reuse of foundry old sand and slag, and reduce the pollution to the environment, the technical solution adopted by the present invention for:

As shown in Fig. 1 and Fig. 2, the foundry used sand and slag recovery treatment equipment provided by the present invention, the recovery treatment equipment is provided with a feeding device 1, a screening device 2, a recycled sand recovery device 13, iron slag material recovery device 11, dust removal device 3; the screening device 2, regenerated sand recovery device 13, and slag iron material recovery device 11 are closed by the same cover, and the cover body is connected to the The dust removal device 3 is connected.

The function of the feeding device 1 is to realize the feeding of old sand and slag to the screening device 2; the function of the screening device 2 is to separate the sand from the lumps, and pass through the recycled sand recovery device 13 and the slag iron Material recycling device 11 recovers them respectively; The effect of described dedusting device 3 is to absorb the dust in old sand and slag.

In order to solve the problem of dust removal and dust diffusion prevention in the whole production process, the above-mentioned equipment of the present invention adopts a fully enclosed structure, that is, under the action of the suction fan 8 of the dust collector and the air circulation of the vent 14 of the dust collector, the dust passes through the dust collector respectively. The air-inducing duct 9 enters the dust removal device 3 and is absorbed and concentrated by the bag in the dust removal device 3 for processing.

The invention realizes the treatment, sorting and reuse of old sand and slag, so as to reduce costs and save resources. The reclaimed sand after dust removal treatment has uniform particle size, low ash content and low cohesiveness, which fully guarantees the quality of the regenerated sand. The evenly broken slag is an ideal material for building bricks, which can make full use of precious resources and will not cause trouble due to the stacking of slag, which is further conducive to environmental protection.

The present invention adopts the above-mentioned technical scheme, has high production efficiency, avoids environmental pollution, and protects workers' health; resources are fully utilized and production costs are reduced.

The following is a detailed description of the structure of the used foundry sand and slag recycling equipment:

As shown in Figures 1 and 2, the feeding device 1 of the present invention is a bucket elevator, and the bucket elevator inlet 4 and the bucket elevator outlet 5 are respectively located in the bucket elevator. below and above the machine;

The sieve body of the sieving device 2 is a polygonal pyramid in cross section, and the side of the pyramid is a screen structure;

The pyramid is arranged horizontally, and the generatrices at the bottom of it are arranged horizontally;

The discharge port 5 of the bucket elevator communicates with the large end opening of the pyramid;

The regenerated sand recovery device 13 is located below the screening device, and the regenerated sand recovery device 13 is provided with a sand storehouse. The sand storehouse is bucket-shaped with a large top and a small bottom, and its lower opening is a stock sand outlet 12;

The slag and iron recovery device 11 has an inclined conduit structure, and the upper port of the conduit structure communicates with the small end opening of the pyramid.

The functions of the above components are:

The old sand enters the small hopper through the bucket elevator inlet 4 in the bucket elevator, and is transported to the bucket elevator outlet 5 for transfer to the screening device 2. Use the bucket elevator to achieve uniform and rapid feeding, and realize the continuous entry of old sand and slag into the sieve body of the screening device 2; the mouth of the bucket elevator feed port 4 is set to be roughly equal to the height of the ground, which is convenient for operators or transportation The machine feeds the old foundry sand or slag used in foundry production into the bucket elevator.

The sieve body of the screening device 2 is constantly rotating, and since the sieve body of the screening device 2 has a multi-ribbed structure, it is more conducive to the crushing of massive objects.

The old sand and slag are evenly crushed, and then enter the regenerated sand recovery device 13 after passing through the screen, that is, the top of the sand warehouse, and effectively separate the iron material from the sand and dust through the sand warehouse screen. The screen of the sand storehouse should also be arranged at an inclination, and its inclination direction is to make the block-shaped material screened out be discharged from the slag iron recovery device 11.

The function of the sand bank is to store the processed raw sand which is used for production again. The overall shape of the sand storehouse is according to requirements, the upper end can be regular polygon, cylindrical, etc., and the lower end of the sand storehouse is funnel-shaped to facilitate shipment by transport vehicles.

The dust generated in the above working process is sucked away by the dust removal device 3, which achieves the effect of sorting and dust removal, and greatly improves the working efficiency. Therefore, this equipment of the present invention is also applicable to the sorting treatment of slag and the like. The production capacity of the processing equipment of the present invention is as follows: the processing capacity of the slag reaches more than 3 tons/hour; the processing capacity of the old sand reaches more than 5 tons/hour.

The above-mentioned dedusting device 3 fully absorbs and collects the dust in the whole process of feeding, crushing, sorting, storing and processing the waste sand, and avoids the dust generated in the production process from polluting the environment.

In order to strengthen the crushing ability of blocky old sand and slag and improve the crushing effect, the present invention sets a crushing hammer inside the sieve body of the above-mentioned screening device 2; Broken abrasive.

The structure and function of dust removal device 3:

The dust removal device 3 of the present invention is a negative pressure bag type dust collector driven by a dust collector induced fan 8 . The negative pressure bag filter draws the dust-containing gas from the dust removal duct 9 to the dust suction bag, and the filtered clean gas is discharged into the atmosphere from the dust collector vent 14; after a period of dust collection, the dust from the dust collector The outlet 10 is discharged collectively.

The overall shape of the above-mentioned negative pressure bag filter can be in the shape of a regular polygon, a cylinder, etc. according to requirements, and the dust outlet 10 of the dust collector at the lower end of the negative pressure bag filter is funnel-shaped to facilitate Shipment of transport vehicles.

The structure of the bucket elevator of the present invention is:

The upper and lower ends of the above-mentioned bucket elevator are respectively equipped with rotating shafts. The upper rotating shaft drives the conveying belt through the bucket elevator motor 6 and the reduction mechanism, and the conveying belt is driven by the pulleys on the upper and lower rotating shafts. A plurality of small hoppers are fixedly installed on the belt, and during the uninterrupted operation of the conveying belt, materials can be quickly and vertically conveyed upward through the small hoppers.

In order to strengthen the protection of the environment and prevent the diffusion of dust, the outside of the bucket elevator described in the present invention is a closed cover.

The bucket elevator used for feeding has an overall shape of a vertical structure with a square cross-section, the upper end is side-mounted with the outlet 5 of the bucket elevator, and the lower end and the upper end are corresponding to the side-mounted bucket elevator Feeding port 4 realizes automatic feeding. The feeding method of the bucket elevator is vertical feeding;

The screening device 2 of the present invention is a hexagonal screen, that is, the cross section of the screen body of the screening device 2 is a regular hexagon. That is, the overall shape of the hexagonal sieve is a hexagonal cone barrel. The hexagonal sieve is driven to rotate by the hexagonal sieve motor 7 .

When the old sand enters the rotating hexagonal sieve from the outlet 5 of the bucket elevator, the rotating sieve body drives the old sand to move, and with the appropriate crushing hammer or crushing grinding body, the crushing of the blocky old sand is realized. And because the hexagonal sieve wall is attached with a sieve, the old sand is crushed and sieved through the sieve before entering the sand storage. The hexagonal sieve as a whole independently realizes complete and uniform crushing; realizes sorting and separation of slag and iron.

In addition, the shape of the hexagonal sieve is a hexagonal cone barrel, and the feed port is at the large end. The rotating iron material and other lumps are guided to the discharge port at the small end along with the screen wall in the sieve cavity, so that the iron material is recovered intensively.

During the rotation process of the hexagonal sieve, the old sand is broken by rolling and colliding, and the broken products enter the sand warehouse through the screen holes of the hexagonal sieve for centralized storage, and the sand is manually unloaded from the storage sand outlet 12 for reuse; The slag and iron material is sent to the slag and iron material outlet of the slag and iron material recovery device 11 through the discharge port of the hexagonal sieve, and finally recovered and reused.

The present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods, as long as various insubstantial improvements are adopted in the method concept and technical solutions of the present invention, or there is no improvement Directly applying the conception and technical solutions of the present invention to other occasions falls within the protection scope of the present invention.

Claims (7)

1. A foundry old sand, slag recovery treatment equipment, it is characterized in that: described recovery treatment equipment is provided with feeding device (1), screening device (2), recycled sand recovery device (13), slag iron material recovery device (11), dedusting device (3); the described screening device (2), recycled sand recovery device (13), and slag iron material recovery device (11) are closed by the same cover body, and the described cover body passes through The dust removal air duct (9) communicates with the dust removal device (3). 2. The casting old sand and slag recycling and processing equipment according to claim 1, characterized in that: the feeding device (1) is a bucket elevator, the bucket elevator feeding port (4) and the bucket elevator Elevator outlet (5) is located at the below and above of described bucket elevator respectively; The sieve body of described screening device (2) is the pyramid that cross section is polygonal, and the side of described pyramid It is a screen structure; the pyramid is horizontally arranged, and the bus bar at the bottom is horizontally arranged; the discharge port (5) of the bucket elevator is communicated with the large end opening of the pyramid; the The reclaimed sand recovery device (13) is located below the screening device, and the regenerated sand recovery device (13) is provided with a sand storehouse. The sand storehouse is bucket-shaped with a large upper part and a smaller lower part. Outlet (12); the inclined conduit structure of the iron slag recovery device (11), the upper port of the conduit structure communicates with the small end opening of the pyramid. 3. according to claim 2 described foundry old sand, slag recovery treatment equipment, it is characterized in that: the sieve body inside of described screening device (2) is provided with crushing hammer head; Or in described screening device ( 2) The inside of the sieve body is equipped with a broken grinding body. 4. The used foundry sand and slag recycling and processing equipment according to claim 1, 2 or 3, characterized in that: the dust removal device (3) is a negative pressure bag dust removal device driven by a dust collector induced fan (8) device. 5. The used foundry sand and slag recovery treatment equipment according to claim 2 or 3, characterized in that: the structure of the bucket elevator is: the upper and lower ends of the bucket elevator are respectively provided with rotating shafts, and the upper end of the rotating shaft The conveyor belt is driven by the bucket elevator motor (6) and the deceleration mechanism, and the conveyor belt is driven by the pulleys on the upper and lower shafts. A plurality of small hoppers are fixedly installed on the conveyor belt. During the intermittent operation, the rapid upward vertical conveying of materials is realized through the small hopper. 6. The used foundry sand and slag recycling and processing equipment according to claim 5, characterized in that: the outside of the bucket elevator is a closed cover. 7. The used foundry sand and slag recovery treatment equipment according to claim 2 or 3, characterized in that: the screening device (2) is a hexagonal screen, that is, the screen body of the screening device (2) The cross-section is a regular hexagon.

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