CN102615243B - Foundry used sand wet intermittent regeneration method and equipment thereof - Google Patents

Foundry used sand wet intermittent regeneration method and equipment thereof Download PDF

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Publication number
CN102615243B
CN102615243B CN 201210084186 CN201210084186A CN102615243B CN 102615243 B CN102615243 B CN 102615243B CN 201210084186 CN201210084186 CN 201210084186 CN 201210084186 A CN201210084186 A CN 201210084186A CN 102615243 B CN102615243 B CN 102615243B
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sand
cylinder
regeneration
equipment
main shaft
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CN 201210084186
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Chinese (zh)
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CN102615243A (en
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樊自田
龙威
刘富初
李雪洁
宗晓明
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华中科技大学
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Abstract

A foundry used sand wet intermittent regeneration method and equipment thereof belong to a foundry used sand regeneration method and equipment thereof, aim to solve the problem of complicated process and narrow application scope of the conventional foundry used sand wet regeneration method, and further solve the problem of relatively complicated structure of the conventional regeneration equipment. The regeneration method comprises a scrubbing step, a second scrubbing step, a third scrubbing step and a checking step. The regeneration equipment comprises a stirrer and a sand-water separation device, wherein the stirrer comprises a support frame, a scrubbing cylinder, a drive cylinder, a motor and a main shaft, and the scrubbing cylinder is provided with a sand inlet and a water inlet and further provided with a water drainage valve and a sand discharge valve. By integrating the combined actions of mechanical stirring, water washing and acid cleaning, the regeneration method provided bythe invention has the advantages of convenience in control, low water consumption, high residual adhesive removal ratio and good sand regeneration quality; the regeneration equipment has the advantages of simple structure, low energy consumption, convenience in control and good sand regeneration quality; and the regeneration method and equipment are suitable for large-scale wet regeneration of used clay sand, used water glass sand and used alkaline phenolic resin sand.

Description

A kind of cast used sand wet method batch (-type) renovation process and equipment thereof
Technical field
The invention belongs to casting old-sand regeneration method and equipment thereof, be specifically related to a kind of cast used sand wet method batch (-type) renovation process and equipment thereof.
Background technology
Casting old-sand regeneration refer to with the old sand piece of crossing through broken and remove residual adhensive membrane and the foreign material that are wrapped on the waste and old sand grains, recover to be bordering on the physics and chemistry performance of fresh sand, use to replace fresh sand.
At present, casting old-sand regeneration method commonly used mainly contains three kinds:
First method is dry reclamation.The form of Used Sand Dry Reclamation Methods is varied, and mechanical type, air-flowing type, oscillatory type etc. are arranged, but sees all it is " collision friction " process with regard to regeneration mechanism.When the active force that produces in the collision friction during greater than the bond strength of the yield strength of the residual adhesive film on the old sand grain or former sand grains and residual adhesive film, residual adhesive film on the old sand grain is destroyed and break away from former sand grains, and residual adhesive film is removed from sand after selection by winnowing; And the number of times of collision friction is more, intensity is larger, and residual adhesive film is removed totallyer, and the effect of dry reclamation is better.But excessive collision friction active force and too much collision friction effect number of times not only can increase the wearing and tearing of element of installation, also can aggravate the fragmentation of sand grains self.Therefore, improving active force and the effect number of times of collision friction in the dry reclamation, is not the best approach that improves the dry reclamation effect.
Device structure and the system layout of Used Sand Dry Reclamation Methods are simple than wet reclamation, invest also less slightlyly, and the secondary pollution problem of dust more easily solves, but its reclaimed sand is of low quality, usually only do floor sand and use.
Second method is thermal reclamation, and old sand through heating, high-temperature roasting, is got rid of the residual binding agent in the old sand, and the thermal reclamation method is multiplex in resin sand regenerating used reuse, and the reclaimed sand quality after the processing is better, and residual binding agent clearance is high.But thermal reclamation exists the shortcomings such as the volatile matter of large, the residual binding agent burning of high temperature energy consumption generation is seriously polluted, cost is high, less economical.
The third method is wet reclamation.Because the water-soluble feature of the residual binding agent of old sand is so that the effect of wet reclamation is good especially.The quality of washed sand is high, and the key property index is close to fresh sand, can 100% make facing sand or system sand uses, the rate of recovery of reclaimed sand is very high (can reach more than 95%) also.But China wet reclamation system in the past adopts the continous way regenerative system more, and structure is more complicated huge, and mechanization degree is lower, and water consumption is large, and the cost of washed sand is higher, and sewage handling problem solves undesirable.
In recent years, the chemical regeneration method of cast used sand is gradually development also, chemical regeneration typically refers in old sand and adds some chemical reagent (or solvent), old sand and chemical reagent (or solvent) are stirred, remove residual binding agent in the old sand and harmful components are recovered old sand or near the physical and chemical performance of fresh sand by chemical reaction.As normally in used sodium silicate sand, adding the solution such as HCl, NH4C1 with neutralization residual Na2O wherein with chemical method recycled water glass sand.The quality of chemical regeneration sand is good, can replace fresh sand to use, but because production cost is high, seldom adopts in practice.
Publication number CN101780521A patent of invention has proposed a kind of process for regenerating forced scrubbing water glass used sand through wet, at first the old sand input jaw crusher of collecting is carried out fragmentation, then is transported to magnetic separator and carries out magnetic separation; Sand grains after the magnetic separation through one-level spiral grit water separator, one-level mixer and deuterostrophies grit water separator to old sand carry out sand moisture from; Through the neutralization precipitation pond sand after separating is neutralized again again; Again through secondary mixer, three grades of spiral grit water separators carry out secondary sand moisture from, guarantee that the waterglass that exists in the old sand can thoroughly remove totally; Be finished product and send into sand storage finally by the sand grains after excessively dedusting, the oven dry.The method adopts multistage wet reclamation system, and regeneration technology and regenerative system structure are relatively complicated, and the method and regenerating used system be only limited to the regeneration of used sodium silicate sand, then can not realize for the clay regenerating used.
200710159803.1 patent of invention has proposed a kind of regenerating used method and regenerating used system thereof, place used sodium silicate sand the used sand regenerating machine heating to clean, dissolve the inert coating on old sand surface, then allow sewage see through the regeneration layer of sand, fine powder in the sewage is trapped within the reclaimed sand, and waterglass flows into storage tank with water.Reclaimed sand sent in the dryer to send into after the oven dry again remove dust in the dry reclamation machine and namely obtain clean reclaimed sand.Liquid in the storage tank can repeatedly repeat to be back to the scouring old sand.In the method and the regenerative system owing to having adopted heating system, whole regenerative system structure is relatively complicated, and the regenerating used cost is higher, and the method and regenerating used system also are only limited to the regeneration of used sodium silicate sand, then can not realize for the clay regenerating used, use the face relative narrower.
201010170597.6 patent of invention proposes a kind of sodium silicate waste sand rotary vibration grinding wet-type regenerator, is used for the regeneration of old sand.Regenerating device comprises the steel helical combined rubber spring, frame, outer cylinder body, inner barrel, barrel lateral plate, ceramic grinding ball and vibrating motor, the steel helical combined rubber spring of regenerating device has many, the outer rim of outer cylinder body is held on middle one group of steel helical combined rubber spring, the inner barrel crown center is provided with the grid sieve plate, ceramic grinding ball places in the cavity that forms between outer cylinder body and the inner barrel, frame is horizontally disposed about described on two groups of steel helical combined rubber springs, and be fixedly connected with regenerating device two barrel lateral plates, vibrating motor has two, two vibrating motor one the first from left right sides are fixedly connected on the frame of outer cylinder body the right and left, and the centerline of its center line and described inner barrel and outer cylinder body is on same straight line.On the whole, this regenerating device adopts the rotary vibration Ginding process that used sodium silicate sand is carried out wet reclamation, and parts are more, the structure relative complex, and the method and regenerating used system also are only limited to the regeneration of used sodium silicate sand, then can not realize for the clay regenerating used.
Summary of the invention
The present invention proposes a kind of cast used sand wet method batch (-type) renovation process, solves existing cast used sand wet reclamation method technique complicated, the problem that use face is narrower; Be provided for simultaneously the equipment of the method, solve the complicated problem of existing reclaim equiment structure, be used for the wet reclamation of clay old sand, used sodium silicate sand and alkali phenolic resins old sand.
A kind of cast used sand wet method batch (-type) renovation process of the present invention is applicable to clay old sand, used sodium silicate sand and alkali phenolic resins old sand, comprises the steps:
(1) once clean step: 1: 0.5 in mass ratio~1: 3, old sand and clear water added respectively to clean in the cylinder stir, then mixing time 30 seconds~300 seconds discharges the sewage of cleaning cylinder;
(2) secondary is cleaned step: again inject a clear water to the scouring cylinder, cleaning the interior old sand of cylinder is 1: 0.5~1: 3 with the clear water quality ratio, stirs, and then mixing time 30 seconds~300 seconds discharges the sewage of cleaning cylinder;
When sand sample is alkalescence, add hydrochloric acid or sulfuric acid during stirring, when concentration of hydrochloric acid was mass percent 37.5%, addition was every kg old sand 0.8~1.5ml hydrochloric acid; When sulfuric acid concentration was mass percent 98.3%, addition was every kg old sand 0.15~0.25ml sulfuric acid;
Clean step (3) three times: inject clear water to cleaning cylinder for the third time, cleaning the cylinder old sand is 1: 0.5~1: 3 with the clear water quality ratio, stir, and mixing time 30 seconds~300 seconds, the sand aqueous mixtures that then will clean cylinder enters the sand water separation equipment to be separated;
(4) checking procedure: the damp sand after the sand water separation equipment separates, after dehydration, oven dry, check its quality whether to meet the requirements again, be then to finish, otherwise turn step (2).
A kind of cast used sand wet reclamation equipment of the present invention comprises mixer and sand water separation device, it is characterized in that:
Described mixer, by bracing frame, clean cylinder, drive cylinder, motor and main shaft and consist of, support frame as described above is frame shape, and its bottom is equipped with and is cleaned cylinder, and the driving cylinder is equipped with in the bracing frame upper surface, and motor is equipped with in the bracing frame side; A described scouring cylinder upper surface has sand inlet and water inlet, cleans a cylinder bottom and has water discharging valve and sediment outflow valve, and water discharging valve is connected with the sediment outflow valve with drainpipe and is connected with the sediment outflow pipe;
Described main shaft top is connected with drive motors by belt drive unit, and the main shaft upper end is connected with the air cylinder tie rod that drives cylinder by the interlock bearing, and described scouring cylinder upper surface is passed in the main shaft bottom, and stirring vane is equipped with in the main shaft bottom;
Described sediment outflow pipe is communicated with the sand water separation device.
Described cast used sand wet reclamation equipment is characterized in that:
Described interlock bearing is made of ball bearing and link, and ball bearing is fixed in link upper surface central authorities; Described belt drive unit is made of large belt wheel, feed belt and small pulley, and feed belt connects large belt wheel and small pulley, and large belt wheel and wheeled pallet are dynamically connected by bearing rotary, and the wheeled pallet bottom is fixed on cleans the cylinder upper surface;
Described drive motors rotating shaft is connected by key pin with described small pulley, and described main axis cross section is rectangle, and main shaft top penetrates described wheeled pallet centre bore and large belt wheel centre bore, is slidingly matched with wheeled pallet centre bore and large belt wheel centre bore; Described main shaft upper end is connected with the link lower end of described interlock bearing, and described air cylinder tie rod lower end embeds the ball bearing of described interlock bearing.
Described cast used sand wet reclamation equipment is characterized in that:
Described driving cylinder is hydraulic cylinder or pneumatic cylinder;
Described sand water separation device is centrifugal separating device or vibration separate equipment.
The course of work of described cast used sand wet reclamation equipment is:
(1) old sand and clear water are added in the scouring cylinder 12 from sand inlet 11 and water inlet 6 respectively by a certain percentage, descend to entering in the sand aqueous mixtures and stir driving cylinder 1 effect lower main axis 10 bottom stirring vanes 13, after stirring end, the sand aqueous mixtures is left in stirring vane 13 risings under 1 effect of driving cylinder, open the water discharging valve 8 of cleaning cylinder 12, effluent sewerage;
(2) sewer complete after, again inject clear water from water inlet 6, and add hydrochloric acid or sulfuric acid, stirring vane 13 enters again cleans cylinder 12 interior stirrings, after stirring finishes, drives cylinder 1 and promotes stirring vane 13, open the water discharging valve 8 of cleaning cylinder 12, effluent sewerage;
(3) inject for the third time clear water, stirring vane 13 enters for the third time to clean in the cylinder 12 and stirs, and behind the stirring certain hour, opens sediment outflow valve 16, the sand aqueous mixtures is discharged together under the effect of stirring vane 13 and is cleaned cylindrical shell, enters sand water separation equipment 18 and separates.
Renovation process of the present invention combines dry reclamation, wet reclamation and chemical regeneration mode, combines the acting in conjunction of mechanical agitation, clear water washing and pickling, and control is convenient, water consumption is little, the residual binding agent clearance of old sand is high, the reclaimed sand quality is good.Reclaim equiment of the present invention is simple in structure, energy consumption is low, be convenient to control, easily realizes the automation of regenerative process, can obtain high-quality reclaimed sand; Be applicable to the extensive wet reclamation of clay old sand, used sodium silicate sand.
Description of drawings
Fig. 1 is cast used sand wet method batch (-type) renovation process schematic flow sheet of the present invention;
Fig. 2 is cast used sand wet reclamation equipment schematic diagram of the present invention;
Fig. 3 is that main shaft, interlock bearing and large belt wheel cooperate schematic diagram.
The specific embodiment
Cast used sand wet method batch (-type) renovation process of the present invention as shown in Figure 1.
Embodiment 1: be used for neutral clay regenerating used, comprise the steps:
(1) once clean step: 1: 0.5 in mass ratio, old sand and clear water added respectively to clean in the cylinder stir scouring, stir 30 seconds scouring time, then discharge the sewage of cleaning cylinder;
(2) secondary is cleaned step: again inject clear water to cleaning cylinder, old sand is 1: 0.5 with the clear water quality ratio in the scouring cylinder, stirs scouring, stirs 30 seconds scouring time, then discharges the sewage of scouring cylinder;
Clean step (3) three times: inject clear water to cleaning cylinder for the third time, cleaning the cylinder old sand is 1: 0.5 with the clear water quality ratio, stirs scouring, stirs 30 seconds scouring time, and the sand aqueous mixtures that then will clean cylinder enters the sand water separation equipment to be separated;
(4) checking procedure: the damp sand after the sand water separation equipment separates, after dehydration, oven dry, check its quality to meet the requirements again, finish.
Record by test, the clay-bonded sand clay content after the regeneration is that 0.2%, 1h tensile strength is 1MPa, and 24h tensile strength is 2.1MPa, near the performance of fresh sand.
Embodiment 2: be used for neutral clay regenerating used, comprise the steps:
(1) once clean step: 1: 3 in mass ratio, old sand and clear water added respectively to clean in the cylinder stir scouring, stir 300 seconds scouring time, then discharge the sewage of cleaning cylinder;
(2) secondary is cleaned step: again inject clear water to cleaning cylinder, old sand is 1: 3 with the clear water quality ratio in the scouring cylinder, stirs scouring, stirs 300 seconds scouring time, then discharges the sewage of scouring cylinder;
Clean step (3) three times: inject clear water to cleaning cylinder for the third time, cleaning the cylinder old sand is 1: 3 with the clear water quality ratio, stirs scouring, stirs 300 seconds scouring time, and the sand aqueous mixtures that then will clean cylinder enters the sand water separation equipment to be separated;
(4) checking procedure: the damp sand after the sand water separation equipment separates, after dehydration, oven dry, check its quality to meet the requirements again, finish.
Record by test, the clay-bonded sand clay content after the regeneration is that 0.18%, 1h tensile strength is 1.05MPa, and 24h tensile strength is 2.2MPa, near the performance of fresh sand.
Embodiment 3: be used for alkaline regenerating water-glass old sand, comprise the steps:
(1) once clean step: 1: 0.5 in mass ratio, old sand and clear water added respectively to clean in the cylinder stir, then mixing time 30 seconds discharges the sewage of cleaning cylinder;
(2) secondary is cleaned step: to cleaning cylinder injection clear water, old sand is 1: 0.5 with the clear water quality ratio in the scouring cylinder, and adds hydrochloric acid again, stirs mixing time 30 seconds, the then sewage of discharge scouring cylinder; When described concentration of hydrochloric acid was mass percent 37.5%, addition was every kg old sand 0.8ml hydrochloric acid;
Clean step (3) three times: inject clear water to cleaning cylinder for the third time, cleaning the cylinder old sand is 1: 0.5 with the clear water quality ratio, stir, and mixing time 30 seconds, the sand aqueous mixtures that then will clean cylinder enters the sand water separation equipment to be separated;
(4) checking procedure: the damp sand after the sand water separation equipment separates, after dehydration, oven dry, check its quality to meet the requirements again, finish.
Record by test, the clay-bonded sand clay content after the regeneration is that 0.21%, 1h tensile strength is 0.95MPa, and 24h tensile strength is 2.0MPa, near the performance of fresh sand.
Embodiment 4: be used for alkaline regenerating water-glass old sand, comprise the steps:
(1) once clean step: 1: 3 in mass ratio, old sand and clear water added respectively to clean in the cylinder stir, then mixing time 300 seconds discharges the sewage of cleaning cylinder;
(2) secondary is cleaned step: to cleaning cylinder injection clear water, old sand is 1: 3 with the clear water quality ratio in the scouring cylinder, and adds hydrochloric acid again, stirs mixing time 300 seconds, the then sewage of discharge scouring cylinder; When described concentration of hydrochloric acid was mass percent 37.5%, addition was every kg old sand 1.5ml hydrochloric acid;
Clean step (3) three times: inject clear water to cleaning cylinder for the third time, cleaning the cylinder old sand is 1: 3 with the clear water quality ratio, stir, and mixing time 300 seconds, the sand aqueous mixtures that then will clean cylinder enters the sand water separation equipment to be separated;
(4) checking procedure: the damp sand after the sand water separation equipment separates, after dehydration, oven dry, check its quality to meet the requirements again, finish.
Record by test, the clay-bonded sand clay content after the regeneration is that 0.19%, 1h tensile strength is 1.05MPa, and 24h tensile strength is 2.0MPa, near the performance of fresh sand.
Embodiment 5: be used for the regenerating used of alkali base phenolic resins, comprise the steps:
(1) once clean step: 1: 0.5 in mass ratio, old sand and clear water added respectively to clean in the cylinder stir, then mixing time 30 seconds discharges the sewage of cleaning cylinder;
(2) secondary is cleaned step: to cleaning cylinder injection clear water, old sand is 1: 0.5 with the clear water quality ratio in the scouring cylinder, and adds sulfuric acid again, stirs mixing time 30 seconds, the then sewage of discharge scouring cylinder; When described sulfuric acid concentration was mass percent 98.3%, addition was every kg old sand 0.15ml sulfuric acid;
Clean step (3) three times: inject clear water to cleaning cylinder for the third time, cleaning the cylinder old sand is 1: 0.5 with the clear water quality ratio, stir, and mixing time 30 seconds, the sand aqueous mixtures that then will clean cylinder enters the sand water separation equipment to be separated;
(4) checking procedure: the damp sand after the sand water separation equipment separates, after dehydration, oven dry, check its quality to meet the requirements again, finish.
Record by test, the clay-bonded sand clay content after the regeneration is that 0.19%, 1h tensile strength is 1.05MPa, and 24h tensile strength is 2.0MPa, near the performance of fresh sand.
Embodiment 6: be used for the regenerating used of alkali base phenolic resins, comprise the steps:
(1) once clean step: 1: 3 in mass ratio, old sand and clear water added respectively to clean in the cylinder stir, then mixing time 30 seconds discharges the sewage of cleaning cylinder;
(2) secondary is cleaned step: to cleaning cylinder injection clear water, old sand is 1: 3 with the clear water quality ratio in the scouring cylinder, and adds sulfuric acid again, stirs mixing time 300 seconds, the then sewage of discharge scouring cylinder; When described sulfuric acid concentration was mass percent 98.3%, addition was every kg old sand 0.25ml sulfuric acid;
Clean step (3) three times: inject clear water to cleaning cylinder for the third time, cleaning the cylinder old sand is 1: 3 with the clear water quality ratio, stir, and mixing time 300 seconds, the sand aqueous mixtures that then will clean cylinder enters the sand water separation equipment to be separated;
(4) checking procedure: the damp sand after the sand water separation equipment separates, after dehydration, oven dry, check its quality to meet the requirements again, finish.
Record by test, the clay-bonded sand clay content after the regeneration is that 0.19%, 1h tensile strength is 1.05MPa, and 24h tensile strength is 2.1MPa, near the performance of fresh sand.
Such as Fig. 2, shown in Figure 3, cast used sand wet reclamation equipment of the present invention, comprise mixer and sand water separation device, mixer is made of bracing frame 7, scouring cylinder 12, driving cylinder 1, motor 5 and main shaft 10, bracing frame 7 is frame shape, its bottom is equipped with and is cleaned cylinder 12, and the bracing frame upper surface is equipped with and is driven cylinder 1, and motor 5 is equipped with in the bracing frame side; Described scouring cylinder 12 upper surfaces have sand inlet 11 and water inlet 6, clean cylinder 12 bottoms and have water discharging valve 8 and sediment outflow valve 16, and water discharging valve 8 is connected with the sediment outflow valve to be connected with the sediment outflow pipe with drainpipe 9 respectively and is connected; Among Fig. 2, clean cylinder 12 interior splendid attire water 14 and sand 15;
Described main shaft 10 tops are connected with drive motors 5 by belt drive unit, and main shaft 10 upper ends are connected with the air cylinder tie rod 20 that drives cylinder 1 by interlock bearing 19, and described scouring cylinder 12 upper surfaces are passed in main shaft 10 bottoms, and stirring vane 13 is equipped with in main shaft 10 bottoms;
Described sediment outflow pipe 17 is communicated with sand water separation device 18.
Described interlock bearing 19 is made of ball bearing and link, and ball bearing is fixed in link upper surface central authorities; Described belt drive unit is made of large belt wheel 2, feed belt 3 and small pulley 4, and feed belt 3 connects large belt wheel 2 and small pulleys 4, and large belt wheel 2 and wheeled pallet 21 are dynamically connected by bearing rotary, and wheeled pallet 21 bottoms are fixed on cleans cylinder 12 upper surfaces;
Drive motors 5 rotating shafts and described small pulley 4 are connected by key pin, and described main shaft 10 cross sections are rectangle, and main shaft 10 tops penetrate described wheeled pallet 21 centre bores and large belt wheel 2 centre bores, are slidingly matched with wheeled pallet 21 centre bores and large belt wheel 2 centre bores; Described main shaft 10 upper ends are connected with the link lower end of described interlock bearing 19, and described air cylinder tie rod 20 lower ends embed the ball bearing of described interlock bearing 19.

Claims (2)

1. a cast used sand wet reclamation equipment comprises mixer and sand water separation device,
Described mixer comprises bracing frame, cleans cylinder, drives cylinder, drive motors and main shaft, and support frame as described above is frame shape, and its bottom is equipped with and is cleaned cylinder, and the driving cylinder is equipped with in the bracing frame upper surface, and drive motors is equipped with in the bracing frame side; A described scouring cylinder upper surface has sand inlet and water inlet, cleans a cylinder bottom and has water discharging valve and sediment outflow valve, and water discharging valve is connected with the sediment outflow valve with drainpipe and is connected with the sediment outflow pipe;
Described main shaft top is connected with drive motors by belt drive unit, and the main shaft upper end is connected with the air cylinder tie rod that drives cylinder by the interlock bearing, and described scouring cylinder upper surface is passed in the main shaft bottom, and stirring vane is equipped with in the main shaft bottom;
Described sediment outflow pipe is communicated with the sand water separation device;
It is characterized in that:
Described interlock bearing is made of ball bearing and link, and ball bearing is fixed in link upper surface central authorities; Described belt drive unit is made of large belt wheel, feed belt and small pulley, and feed belt connects large belt wheel and small pulley, and large belt wheel and wheeled pallet are dynamically connected by bearing rotary, and the wheeled pallet bottom is fixed on cleans the cylinder upper surface;
Described drive motors rotating shaft is connected by key pin with described small pulley, and described main axis cross section is rectangle, and main shaft top penetrates described wheeled pallet centre bore and large belt wheel centre bore, is slidingly matched with wheeled pallet centre bore and large belt wheel centre bore; Described main shaft upper end is connected with the link lower end of described interlock bearing, and described air cylinder tie rod lower end embeds the ball bearing of described interlock bearing.
2. cast used sand wet reclamation equipment as claimed in claim 1 is characterized in that:
Described driving cylinder is hydraulic cylinder or pneumatic cylinder;
Described sand water separation device is centrifugal separating device or vibration separate equipment.
CN 201210084186 2012-03-27 2012-03-27 Foundry used sand wet intermittent regeneration method and equipment thereof CN102615243B (en)

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CN104759584A (en) * 2015-04-22 2015-07-08 莒州集团有限公司 Water glass waste sand regeneration optimizing treatment method and water glass waste sand regeneration optimizing treatment system
CN105695188A (en) * 2016-02-17 2016-06-22 安徽索立德铸业有限公司 Used resin sand processing agent for sand casting
CN105945217A (en) * 2016-05-26 2016-09-21 合肥市田源精铸有限公司 Treatment method of phenolic resin self-hardening sand
CN106040969A (en) * 2016-05-26 2016-10-26 合肥市田源精铸有限公司 Preparation method for phenolic resin self-hardening sand
CN105945216A (en) * 2016-05-26 2016-09-21 合肥市田源精铸有限公司 Waste sand core regeneration treatment method of precoated sand
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CN105921690A (en) * 2016-05-26 2016-09-07 合肥市田源精铸有限公司 Treatment method for furan resin self-hardening sand
CN105903895A (en) * 2016-05-26 2016-08-31 合肥市田源精铸有限公司 Treatment method of waste sand core for cold core box
CN105903893A (en) * 2016-05-26 2016-08-31 合肥市田源精铸有限公司 Regeneration treatment method of waste sand core for casting
CN105903894A (en) * 2016-05-26 2016-08-31 合肥市田源精铸有限公司 Regeneration treatment method of clay wet type used sand
CN106001401A (en) * 2016-05-26 2016-10-12 合肥市田源精铸有限公司 Regeneration treatment method for old sand of phenolic resin self-hardening sand
CN109482809A (en) * 2018-12-25 2019-03-19 大连汇隆活塞股份有限公司 A kind of processing method of waste and old waterglass chrome ore
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