CN209716373U - A kind of device for precoated sand recycling - Google Patents

Abstract

The utility model provides a kind of device for precoated sand recycling, including disintegrating mechanism, electromagnetism screening mechanism, thermal reclamation mechanism, electromagnetism screening mechanism discharge gate is connected with grinding mechanism through pipeline, it grinds mechanism lower part and is equipped with storage bin, storage bin is equipped with the first auger, first auger is equipped with first discharge port and the second discharge gate, and is respectively equipped with valve on first discharge port and the second discharge gate.First discharge port is connect with reactor tank feed inlet, and reactor tank connects the first charging aperture of thermal reclamation mechanism by the second auger, forms the first closed processing mechanism.Second discharge gate is connect with the second charging aperture of thermal reclamation mechanism, forms closed second processing mechanism.By the present apparatus efficiency of processing can be improved, the usage amount of the energy and reaction solution is reduced, reduces costs by increasing the active area of resin film for the resin UF membrane on roughing sand and its surface according to the different selection process circuits of precoated sand.

Description

A kind of device for precoated sand recycling

Technical field

The utility model relates to precoated sand recycling field more particularly to a kind of devices for precoated sand recycling.

Background technique

Precoated sand is the abbreviation of coated sand (Resin Coated Sand), is invented with the moulding of shell mould method A kind of novel modeling material, and with the development of external machinery industry especially automobile industry, casting quality is required more and more It is high.Precoated sand be by being covered with the molding sand of one layer of resin in sand grain surface or core sand is formed, the shell mould that is formed through precoated sand and Core pattern is after use just at waste, and discarded precoated sand causes environmental pollution, the waste of resource, production cost mention It is high.

Through studying, the old sand in precoated sand after use makes sand grains more because heating temperature has been more than the phase transition temperature of roughing sand Add rounding, even particle size distribution, tensile strength to increase, gas forming amount reduction, thermally expand small feature, performance with roughing sand than having There is more advantage, so that the rejection rate of casting substantially reduces, ensure that product quality.Therefore, either to the recycling of old sand It is from social benefit or all very great from economic benefit meaning.

With the continuous development of precoated sand production technology, the technology of preparing of precoated sand also constantly develops, different to adapt to The quality requirement of casting also tends to diversification in the selection of precoated sand roughing sand, precoated sand preparation when be added ferrous sulfate, The additives such as curing agent are to improve the characteristic of precoated sand.Therefore, there are two types of the recyclable device tools of precoated sand, one is recycling to fill Set be to after using precoated sand crush and Screening Treatment, reusable heat method regenerating unit carry out high temperature sintering, remove on its surface Adhensive membrane obtain that treated recycling sand recycled；Another recyclable device be to after using precoated sand crush and Screening Treatment, then through carrying out immersion treatment in sodium hydroxide solution, high temperature sintering is finally carried out, remove the binder on its surface Film obtains that treated, and recycling sand is recycled.Both the above method processing recycling precoated sand needs different processing equipments, Being significantly increased for processing cost is caused, and can there is a problem of that energy consumption is big, production efficiency is low during processing, therefore, How the regeneration of precoated sand is more preferably realized, solving the above problems just becomes crux.

In view of this, it is necessary to the recycling and processing device of precoated sand in the prior art is improved, it is above-mentioned to solve Problem.

Summary of the invention

It is used for what precoated sand recycled the purpose of this utility model is to provide applied widely, high-efficient, good leak tightness Device.The utility model is to recycle the precoated sand after use by the processing of the device of a set of sealing, by by precoated sand Shell, core carry out coarse crushing, then the iron charge in the discarded precoated sand after coarse crushing are screened away, through that will discard in grinder Precoated sand in roughing sand and roughing sand surface resin UF membrane.The device of the sealing of the utility model is divided into two processing pipes Road, first pipeline is used to handle the precoated sand in resin film containing ferrous sulfate, because containing ferrous sulfate, sulfuric acid in resin film Ferrous iron has reproducibility, the toxic gas of sulfur-bearing is decomposed to give off when by high fever, and ferrous sulfate melts under high temperature, when calcining Will lead to roughing sand agglomeration influences calcining effect and later period overlay film effect, it is therefore desirable to shift to an earlier date in advance to the ferrous sulfate in resin film Processing；Article 2 pipeline is SiO for handling roughing sand₂Precoated sand, contain SiO₂If precoated sand using first pipeline at Reason, will lead to SiO₂Roughing sand is destroyed, it is therefore desirable to which another Article 2 pipeline carries out the recycling of precoated sand.

Realize that the technical solution of the utility model aim is as follows: a kind of device for precoated sand recycling, including pulverizer Structure, electromagnetism screening mechanism, thermal reclamation mechanism, electromagnetism screening mechanism is located at the lower part of disintegrating mechanism, and electromagnetism screening mechanism is logical Piping is connect with disintegrating mechanism.Electromagnetism screening mechanism discharge gate is connected with grinding mechanism through pipeline, and grinding mechanism will be for that will sieve The resin UF membrane of roughing sand and roughing sand surface in the discarded precoated sand of coarse crushing after choosing, by carrying out roughing sand and resin film Separation, improves the treatment effeciency of thermal reclamation mechanism, reduces the consumption of the energy.It grinds mechanism lower part and is equipped with storage bin, storing Storehouse is equipped with the first auger, and the first auger is equipped with first discharge port and the second discharge gate, and first discharge port and the second discharge Valve is respectively equipped on mouthful.

First discharge port is connect with reactor tank feed inlet, and reactor tank connects the first of thermal reclamation mechanism by the second auger Feed inlet forms the first closed processing mechanism.First processing mechanism is for handling the precoated sand containing ferrous sulfate, and first When discharge gate is connected to, the second discharge gate is closed.

Second discharge gate is connect with the second charging aperture of thermal reclamation mechanism, forms closed second processing mechanism.Second Processing mechanism is SiO for handling roughing sand₂Precoated sand, and the second discharge gate be connected to when, first discharge port close.

When grinding mechanism grinding, the first auger stops working, and the valve in first discharge port and the second discharge gate is turned off.

Wherein, grinding mechanism is rod mill, and several rod irons are equipped in rod mill.When work, between rod iron Precoated sand is under the crush and grind effect of rod iron, and roughing sand surface resin film is separated with roughing sand in precoated sand.Coarse powder after screening Discarded precoated sand is between rod iron, when operation, on the one hand since the mutual extrusion friction between rod iron makes precoated sand surface Resin film be detached to form resin film fragment；On the other hand the precoated sand under rod iron is carried out since the gravity of rod iron is fallen It hits, so that bulky grain overlay film sand lump is separated into small precoated sand particle.The disengaging of resin film, so that the acting surface of resin film fragment Product increases, and improves in reactor tank or thermal reclamation treatment effeciency within the organization.

Further, the discharge gate of rod mill is additionally provided with vibrating screen, and used by oscillating screen is in the bulky grain that will be fallen off in precoated sand Resin membrane choosing collect, to reduce the amount of the resin film handled in reacted tank or thermal reclamation mechanism.The tree isolated Adipose membrane fragment has irregular shape, and roughing sand is circle or similar round, is revolved after shaking by the sieve of vibrating screen, largely Resin film fragment is trapped within sieve top, and a small amount of resin film fragments sifts with roughing sand, by the resin film fragment after retention Otherwise processed after collection thus greatly reduces the treating capacity of reactor tank or thermal reclamation mechanism, reduces reaction solution and thermal energy Loss.

Wherein, equipped in sodium hydroxide solution, the mixed solution of potassium permanganate and sulfuric acid, hydrogenperoxide steam generator in reactor tank One kind, the ferrous sulfate in resin film fragment can chemically react with the above reaction solution, and ferrous iron is reduced to trivalent Iron or will make ferrous iron reaction generate it is insoluble sink to the bottom object, what separation released sulfur-bearing when avoiding ferrous sulfate high temperature has poison gas Body.

Further, reactor tank inner top side is equipped with reactor tank feed inlet, and center of inside is equipped with blender, passes through stirring The stirring of device improves the contact area of reaction solution in resin film fragment and tank, accelerates reaction efficiency.The bottom of reactor tank is cone Shape structure is equipped with centrifuge at the discharge gate of pyramidal structure bottom, and the slag-drip opening of centrifuge is connect with the second auger, centrifuge Leakage fluid dram is connected to reactor tank top inlet, and on the pipeline that the leakage fluid dram of centrifuge is connect with reactor tank top inlet Equipped with sampling valve.The reaction solution concentration in the liquid of centrifugation is detected by sampling valve sampling, replaces reaction solution in time.

Wherein, the material of the first auger and the second auger is one of PEC or stainless steel, PEC or stainless steel material When first auger and the second auger can prevent from transporting precoated sand, the first auger and the second auger are worn or corrode, and improve The airtightness and service life of first auger and the second auger.

Wherein, in order to improve the airtightness of recyclable device, the usage amount of the first auger and the second auger is reduced, and avoid increasing Add the increase for promoting the devices such as hopper, guarantee the simple of device structure, by disintegrating mechanism, electromagnetism screening mechanism, grinding mechanism, storage Feed bin is arranged in from top to bottom on moveable support frame, and support frame is made for thickness is stainless steel welded.

Wherein, thermal reclamation mechanism be vertical shaft furnace, along vertical shaft furnace short transverse and be located at vertical shaft furnace Two sides be equipped with several burners, in vertical shaft furnace be equipped with two layers of heat-resisting Bauer circular layer, Bauer circular layer be located at it is vertical Between the burner of combustion furnace two sides.Make isolated resin film fragment and roughing sand surface by Bauer circular layer combination burner in tower On the one hand a small amount of duplicate roasting ashing of unsegregated resin film, the presence of Bauer circular layer can reduce the pressure drop in combustion furnace, On the other hand can be certain to the resin film fragment and roughing sand that fall from top to bottom in combustion furnace blocking buffer function, extend The action time of resin film fragment and roughing sand in combustion furnace keeps resin film fragment and roughing sand adequately grey in combustion furnace Change.

Further, burner has 6, and 6 burners are arranged on vertical shaft furnace, can guarantee in resin film fragment And it can be adequately ashed when roughing sand whereabouts.

Compared with prior art, the utility model has the beneficial effects that

1. the grinding mechanism by rod mill separates the discarded precoated sand after coarse crushing, so that resin film and original Sand carries out separation and forms resin film fragment, and the separation of resin film increases the active area of resin film fragment, improves reactor tank Or the treatment effeciency of thermal reclamation mechanism, the consumption of the energy is reduced, production processing cost is reduced.

2. the setting of two processing pipelines, enables recyclable device to cover suitable for what different process was produced in recyclable device The recycling of film sand, and by the way that entire recyclable device is sealed processing, prevents when equipment is run, discard precoated sand, roughing sand, The exposing of resin film etc. or the generation for causing fugitive dust, improve the tidiness in processing workshop, and avoid in operation precoated sand, Roughing sand, resin film etc. cause healthy hidden danger because fugitive dust etc. is sucked by operating personnel.

3. the setting of vibrating screen on grinder, otherwise processed after the retention of most of resin film fragment is collected, reduce into The resin film amount of debris for entering reactor tank or thermal reclamation mechanism improves the treatment effeciency of reactor tank or thermal reclamation mechanism, drop The low loss of reaction solution and thermal energy.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the recyclable device of the utility model；

Fig. 2 is the schematic diagram of thermal reclamation mechanism in the utility model；

Wherein: 1. disintegrating mechanisms；2. electromagnetism screening mechanism；3. grinding mechanism；4. thermal reclamation mechanism；5. reactor tank；6. Storage bin；7. support frame；8. storing up ash-pit；31. first discharge port；32. the second discharge gate；33. the first auger；34. the second auger； 41. burner；42. Bauer circular layer；43. first charging aperture；44. second charging aperture.

Specific embodiment

The utility model is described in detail in each embodiment shown in reference to the accompanying drawing, but it should be stated that, These embodiments are not limitation of the utility model, those of ordinary skill in the art according to these embodiments made by function Energy, method or equivalent transformation or substitution in structure, belong within the protection scope of the utility model.

In the description of the present embodiment, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower", The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description the invention and simplifies description, rather than indicate Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand For the limitation to the invention.

In addition, term " first ", " second ", " third " etc. are used for description purposes only, it is not understood to indicate or imply Relative importance or the quantity for implicitly indicating indicated technical characteristic.The feature of " first ", " second " etc. is defined as a result, It can explicitly or implicitly include one or more of the features.In the description of the invention, unless otherwise indicated, The meaning of " plurality " is two or more.

Term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to removable Connection is unloaded, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be in Between medium be indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, can pass through Concrete condition understands concrete meaning of the above-mentioned term in the invention.

Embodiment 1:

It please join shown in Fig. 1 ~ 2, a kind of device for precoated sand recycling provided in this embodiment, in the present embodiment, The device of precoated sand recycling, including disintegrating mechanism 1,1 lower part of disintegrating mechanism are connected with electromagnetism screening mechanism 2, electromagnetism by pipeline 2 discharge gate of screening mechanism is connected with grinding mechanism 3 by pipeline.

Wherein, disintegrating mechanism 1 is used to overlay film arenaceous shell, core carrying out coarse crushing, removes wherein by electromagnetism screening mechanism 2 The raw materials such as iron charge.

Wherein, the tree of roughing sand and roughing sand surface in the discarded precoated sand of the coarse crushing after grinding mechanism 3 is used to screen Adipose membrane separation.It grinds 3 lower part of mechanism and is equipped with storage bin 6, storage bin 6 is equipped with the first auger 33, and the first auger 33 is equipped with the Precoated sand is divided into two processing pipelines by one discharge gate 31 and the second discharge gate 32, first discharge port 31 and the second discharge gate 32, And valve is respectively equipped on first discharge port 31 and the second discharge gate 32.

First pipeline are as follows: first discharge port 31 is connected with reactor tank 5, and reactor tank 5 is connected by the second auger of stainless steel 34 The first charging aperture 43 for meeting thermal reclamation mechanism 4 forms the first closed processing mechanism.First processing mechanism contains for handling The precoated sand of ferrous sulfate, and when the connection of first discharge port 31, the second discharge gate 32 is closed.

Article 2 pipeline are as follows: the second discharge gate 32 is connect with the second charging aperture 44 of thermal reclamation mechanism 4, is formed closed Second processing mechanism.Second processing mechanism is SiO for handling roughing sand₂Precoated sand, and the second discharge gate 32 be connected to when, first Discharge gate 31 is closed.

When grinding the grinding of mechanism 3, the first auger 33 stops working, the valve in first discharge port 31 and the second discharge gate 32 It is turned off.

Wherein, grinding mechanism 3 is rod mill, and several rod irons are equipped in rod mill.When work, between rod iron Precoated sand is under the crush and grind effect of rod iron, and roughing sand surface resin film is separated with roughing sand in precoated sand.

Wherein, sodium hydroxide solution, the ferrous sulfate in resin film fragment are equipped in the reactor tank 5 in the first processing mechanism It is insoluble heavy to chemically react with the above reaction solution, ferrous iron is reduced to ferric iron or ferrous iron reaction will be made to generate Substrate, separation releases the toxic gas of sulfur-bearing when avoiding ferrous sulfate high temperature.

Further, 5 inner top side of reactor tank is equipped with reactor tank feed inlet, and center of inside is equipped with blender, by stirring The stirring for mixing device improves the contact area quickening reaction efficiency of reaction solution in resin film fragment and tank, and avoids resin film fragment And roughing sand is deposited on 5 bottom of reactor tank.The bottom of reactor tank 5 is pyramidal structure, be equipped at the discharge gate of pyramidal structure bottom from Scheming (does not show) that the slag-drip opening of centrifuge is connect with the second auger of stainless steel 34 in attached drawing, the leakage fluid dram of centrifuge with react The connection of tank inlet.

Wherein, thermal reclamation mechanism 4 be vertical shaft furnace, along vertical shaft furnace short transverse and be located at vertical shaft furnace Two sides be equipped with multiple burners 41, two layers of heat-resisting Bauer circular layer 42 is equipped in vertical shaft furnace, Bauer circular layer 42 is located at Between the burner 41 of vertical shaft furnace two sides.Make isolated resin film fragment and original in conjunction with burner 41 for 42 layers of Pall ring in tower On a small quantity on the one hand the duplicate roasting ashing of unsegregated resin film, the presence of Bauer circular layer 42 can reduce in combustion furnace on sand surface Pressure drop, blocking that on the other hand can be certain to the resin film fragment and roughing sand that fall from top to bottom in combustion furnace, which buffers, to be made With extending the action time of resin film fragment and roughing sand in combustion furnace, enable resin film fragment and roughing sand in combustion furnace Interior sufficient ashing.

Embodiment 2:

It please join shown in Fig. 1 ~ 2, a kind of device for precoated sand recycling provided in this embodiment, in the present embodiment, The device of precoated sand recycling,

Including disintegrating mechanism 1,1 lower part of disintegrating mechanism is connected with electromagnetism screening mechanism 2, electromagnetism screening mechanism 2 by pipeline Discharge gate is connected with grinding mechanism 3 by pipeline.And in order to improve the airtightness of recyclable device, the usage amount of auger is reduced, and It avoids increasing the increase for promoting the devices such as hopper, guarantees the simple of device structure, by disintegrating mechanism 1, electromagnetism screening mechanism 2, grind Grinding machine structure 3, storage bin 6 are arranged in from top to bottom 7 on moveable thick stainless steel welded manufactured support frame.

Wherein, disintegrating mechanism 1 is used to overlay film arenaceous shell, core carrying out coarse crushing, removes wherein by electromagnetism screening mechanism 2 The raw materials such as iron charge.

Wherein, the tree of roughing sand and roughing sand surface in the discarded precoated sand of the coarse crushing after grinding mechanism 3 is used to screen Adipose membrane separation.Lower part is equipped with storage bin 6, and storage bin 6 is equipped with the first auger 33, and the first auger 33 is equipped with first discharge port 31 And precoated sand is divided into two processing pipelines, and the first discharge by second discharge gate 32, first discharge port 31 and the second discharge gate 32 Valve is respectively equipped on mouth 31 and the second discharge gate 32.

First pipeline are as follows: first discharge port 31 is connected with reactor tank 5, and reactor tank 5 connects heat by the second auger of PEC 34 The first charging aperture 43 of method regeneration sector 4 forms the first closed processing mechanism.First processing mechanism contains sulfuric acid for handling Ferrous precoated sand, and when the connection of first discharge port 31, the second discharge gate 32 is closed.

Article 2 pipeline are as follows: the second discharge gate 32 is connect with the second charging aperture 44 of thermal reclamation mechanism 4, is formed closed Second processing mechanism.Second processing mechanism is SiO for handling roughing sand₂Precoated sand, and the second discharge gate 32 be connected to when, first Discharge gate 31 is closed.

When grinding the grinding of mechanism 3, the first auger 33 stops working, the valve in first discharge port 31 and the second discharge gate 32 It is turned off.

Wherein, grinding mechanism 3 is rod mill, and several rod irons are equipped in rod mill.When work, between rod iron Precoated sand is under the crush and grind effect of rod iron, and roughing sand surface resin film is separated with roughing sand in precoated sand.

Further, it in order to reduce the amount of resin film fragment in precoated sand, reduces in reactor tank 5 or thermal reclamation mechanism 4 The consumption of reaction solution and thermal energy, the discharge gate of rod mill are additionally provided with vibrating screen (in attached drawing for display), and used by oscillating screen is in by overlay film The resin membrane choosing of the bulky grain to fall off in sand is collected, to reduce the resin film handled in reacted tank or thermal reclamation mechanism Amount.Because the resin film fragment isolated has irregular shape, roughing sand is circle or similar round, is acted in vibrating screen When, round or similar round roughing sand can by the sieve of vibrating screen, particle is big and resin film fragment in irregular shape not It can be retained by the sieve of vibrating screen, and the resin film amount filtered down with roughing sand greatly reduces.

Wherein, sodium hydroxide solution, the ferrous sulfate in resin film fragment are equipped in the reactor tank 5 in the first processing mechanism It is insoluble heavy to chemically react with the above reaction solution, ferrous iron is reduced to ferric iron or ferrous iron reaction will be made to generate Substrate, separation releases the toxic gas of sulfur-bearing when avoiding ferrous sulfate high temperature.

Further, 5 inner top side of reactor tank is equipped with reactor tank feed inlet, and center of inside is equipped with blender, by stirring The stirring for mixing device improves the contact area quickening reaction efficiency of reaction solution in resin film fragment and tank, and avoids resin film fragment And roughing sand is deposited on 5 bottom of reactor tank.The bottom of reactor tank 5 is pyramidal structure, be equipped at the discharge gate of pyramidal structure bottom from Scheming (does not show) that the slag-drip opening of centrifuge is connect with the second auger of PEC 34 in attached drawing, the leakage fluid dram of centrifuge and reactor tank into The connection of liquid mouth.And sampling valve is equipped on the pipeline that the leakage fluid dram of centrifuge is connect with 5 top inlet of reactor tank.By taking The sampling of sample valve detects the reaction solution concentration in the liquid of centrifugation, replaces reaction solution in time.

Wherein, thermal reclamation mechanism 4 be vertical shaft furnace, along vertical shaft furnace short transverse and be located at vertical shaft furnace Two sides be equipped with 6 burners 41, two layers of heat-resisting Bauer circular layer 42 is equipped in vertical shaft furnace, Bauer circular layer 42 is located at vertical Between the burner 41 of formula combustion furnace two sides.Make isolated resin film fragment and roughing sand in conjunction with burner 41 for 42 layers of Pall ring in tower On a small quantity on the one hand the duplicate roasting ashing of unsegregated resin film, the presence of Bauer circular layer 42 can reduce in combustion furnace on surface Pressure drop, blocking buffer function that on the other hand can be certain to the resin film fragment and roughing sand that fall from top to bottom in combustion furnace, The action time of resin film fragment and roughing sand in combustion furnace is extended, resin film fragment and roughing sand is enable to fill in combustion furnace The ashing divided.

Further, for the cigarette ash discharge that will be ashed in vertical shaft furnace, in the middle and upper part of vertical shaft furnace and separate The position of burner 41 and vertical shaft furnace charging is equipped with smoke outlet, and is connected with cooling device in smoke outlet, under cooling device Portion is equipped with storage ash-pit 8, and cooling device is connected with air blower, and the cigarette ash under the swabbing action of air blower in vertical shaft furnace is taken out Out, cooling device is for cooling down to the cigarette ash of extraction and being fallen in the storage ash-pit 8 of vertical shaft furnace lower part, by air blower It is located in the rear end of cooling device, the cigarette ash that can place high fever causes high temperature to air blower.

Further, there is cooler pan in 8 outer disk of storage ash-pit of Vertical Burn furnace bottom sand removing hole connection.

Tool of the series of detailed descriptions listed above only for the feasible embodiment of the utility model Body explanation, they are all without departing from made by the utility model skill spirit not to limit the protection scope of the utility model Equivalent implementations or change should be included within the scope of protection of this utility model.

It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting Related claim.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.

Claims (9)

1. a kind of device for precoated sand recycling, including disintegrating mechanism, electromagnetism screening mechanism, thermal reclamation mechanism, electromagnetic sieve Sub-agencies are located at the lower part of disintegrating mechanism, and electromagnetism screening mechanism is connect by pipeline with disintegrating mechanism, it is characterised in that: described Electromagnetism screening mechanism discharge gate is connected with grinding mechanism through pipeline, and the grinding mechanism is for the discarded of the coarse crushing after screening The resin UF membrane of roughing sand and roughing sand surface in precoated sand；The grinding mechanism lower part is equipped with storage bin, on the storage bin Equipped with the first auger, first auger is equipped with first discharge port and the second discharge gate, and first discharge port and the second discharge Valve is respectively equipped on mouthful；

The first discharge port is connect with reactor tank feed inlet, and the reactor tank connects the thermal reclamation machine by the second auger The first charging aperture of structure forms the first closed processing mechanism；First processing mechanism contains ferrous sulfate for handling Precoated sand, and when first discharge port connection, second discharge gate is closed；

Second discharge gate is connect with the second charging aperture of the thermal reclamation mechanism, forms closed second processing mechanism； The second processing mechanism is SiO for handling roughing sand₂Precoated sand, and second discharge gate be connected to when, the first row Material mouth is closed；

When the grinding mechanism is ground, first auger stops working, in the first discharge port and second discharge gate Valve be turned off.

2. the device according to claim 1 for precoated sand recycling, it is characterised in that: the grinding mechanism is rod milling Machine, and several rod irons are equipped in rod mill；When work, the precoated sand between rod iron is made in the crush and grind of the rod iron Under, roughing sand surface resin film is separated with roughing sand in precoated sand.

3. the device according to claim 2 for precoated sand recycling, it is characterised in that: the discharge gate of the rod mill is also Equipped with vibrating screen, the used by oscillating screen is collected in by the resin membrane choosing of the bulky grain to fall off in precoated sand, to reduce through institute State the amount of the resin film handled in reactor tank or the thermal reclamation mechanism.

4. the device according to claim 1 for precoated sand recycling, it is characterised in that: be equipped with hydrogen-oxygen in the reactor tank Change one of mixed solution, the hydrogenperoxide steam generator of sodium solution, potassium permanganate and sulfuric acid.

5. the device according to claim 4 for precoated sand recycling, it is characterised in that: reactor tank inner top side Equipped with the reactor tank feed inlet, center of inside is equipped with blender；The bottom of the reactor tank is pyramidal structure, the taper knot Centrifuge is equipped at the discharge gate of structure bottom, the slag-drip opening of the centrifuge is connect with second auger, the centrifuge Leakage fluid dram is connected to reactor tank top inlet, and in the leakage fluid dram of the centrifuge and reactor tank top inlet The pipeline of connection is equipped with sampling valve.

6. the device according to claim 1 for precoated sand recycling, it is characterised in that: first auger and described the The material of two augers is one of PEC or stainless steel.

7. the device according to claim 1 for precoated sand recycling, it is characterised in that: the disintegrating mechanism, electromagnetic sieve Sub-agencies, grinding mechanism, storage bin are arranged in from top to bottom on moveable support frame, and support frame as described above is thick stainless steel weldering It connects and is made.

8. the device according to claim 1 for precoated sand recycling, it is characterised in that: the thermal reclamation mechanism is vertical Formula combustion furnace, the short transverse along the vertical shaft furnace and the two sides positioned at the vertical shaft furnace are equipped with several burnings Device, is equipped with two layers of heat-resisting Bauer circular layer in the vertical shaft furnace, and the Bauer circular layer is located at the vertical shaft furnace two Between the burner of side.

9. the device according to claim 8 for precoated sand recycling, it is characterised in that: the burner has 6.