CN107321912B - A kind of regeneration method of Ester cured alkalescent phenol resin old sand - Google Patents
A kind of regeneration method of Ester cured alkalescent phenol resin old sand Download PDFInfo
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- CN107321912B CN107321912B CN201710541716.6A CN201710541716A CN107321912B CN 107321912 B CN107321912 B CN 107321912B CN 201710541716 A CN201710541716 A CN 201710541716A CN 107321912 B CN107321912 B CN 107321912B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
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Abstract
The present invention provides a kind of regeneration methods of Ester cured alkalescent phenol resin old sand, including, Ester cured alkalescent phenol resin old sand is uniformly mixed with compound remover, and after being heated at 250-500 DEG C, it is chemically reacted, wherein compound remover includes inorganic acid, organic acid, inorganic salts and water；After reclaimed sand after reaction is heated at 600-900 DEG C, cooling, screening obtains Ester cured alkalescent phenol resin reclaimed sand.Regeneration method provided by the invention can remove the resin film and basic anhydride of Ester cured alkalescent phenol resin old sand surface attachment, avoid sand grains adhesion problem and residual potassium, sodium problem, the Ester cured alkalescent phenol resin reclaimed sand guaranteed with the same or similar excellent performance of fresh sand.
Description
Technical field
The present invention relates to casting sand core Material Field more particularly to a kind of regeneration sides of Ester cured alkalescent phenol resin old sand
Method.
Background technique
As country is increasingly stringenter environmental requirement, many heavy castings factories have undergone technological transformation, and use Ester cured instead
Alkalescent phenol resin sand, furan resin-sand or ester hardened sodium silicate sand manufacture production casting.Wherein, Ester cured alkalescent phenol resin
Sand is had more than 30 years history from the 1980s till now by invention, is a kind of water-soluble thermosetting phenolic resin, resin
In strong basicity, high temperature resistance with higher, the production suitable for steel-casting, nodular iron casting, aluminium alloy castings.With resin
Sand is made casting sand type core and pours into metal casting with good stable dimensions and surface smoothness for Metal Melting.But
It is that the coated sand after being poured use becomes cast used sand.It is recycled after how handling cast used sand, being conducive to can for realization
Sustainable development, while reducing cost.
The regeneration method of common Ester cured alkalescent phenol resin old sand has mechanical regeneration and thermal reclamation.Wherein, mechanical
Regeneration handles the Ester cured alkalescent phenol resin old sand after casting by mechanical friction, removes Ester cured alkaline phenol formaldehyde tree
Rouge old sand resin film remained on surface obtains the Ester cured of technical indicator same or like with Ester cured alkalescent phenol resin fresh sand
Alkalescent phenol resin reclaimed sand.Thermal reclamation is to be declined by heating to Ester cured alkalescent phenol resin old sand at 400-800 DEG C
Ester cured alkalescent phenol resin old sand resin film remained on surface burns solution of losing points, and obtains and the new sand facies of Ester cured alkalescent phenol resin
The Ester cured alkalescent phenol resin reclaimed sand that same or similar techniques require.
Since Ester cured alkalescent phenol resin old sand surface resin film has good toughness, it is difficult effectively to go with machinery regeneration
Except the resin film on old sand surface, the Ester cured alkalescent phenol resin reclaimed sand for causing mechanical regeneration to obtain also has a large amount of resin
Film not can be removed, and in turn results in Ester cured alkalescent phenol resin reclaimed sand intensity and is greatly lowered, seriously affects subsequent use.With
When thermal reclamation handles Ester cured alkalescent phenol resin old sand, when heating temperature is more than 600 DEG C, bonded again between sand grains
Together.And temperature is higher, bonds more serious problem, influences the effect of striping and decomposition reaction, cause at thermal reclamation
Manage the requirement that obtained Ester cured alkalescent phenol resin reclaimed sand technical indicator is also unable to meet production.In addition to this, Ester cured
Remain a small amount of potassium, sodium compound in the resin film on alkalescent phenol resin old sand surface, is difficult to be removed its whole with thermal reclamation
It goes.Residual potassium is present in Ester cured alkalescent phenol resin reclaimed sand, and the serious Ester cured alkalescent phenol resin reclaimed sand that reduces glues
Knotting strength and humidity-proof ability.
Summary of the invention
The present invention provides a kind of regeneration methods of Ester cured alkalescent phenol resin old sand, to solve because of Ester cured alkalinity phenol
Surface resin film is difficult to completely remove during urea formaldehyde regenerating used, and the Ester cured alkalescent phenol resin for causing regeneration to obtain
The performance of reclaimed sand is difficult to problem up to standard.
The regeneration method of Ester cured alkalescent phenol resin old sand provided by the invention, comprising the following steps: step S10, it will
Ester cured alkalescent phenol resin old sand is uniformly mixed with compound remover, and at 250-500 DEG C after heating, it is anti-to carry out chemistry
It answers, wherein compound remover includes inorganic acid, organic acid, inorganic salts and water；Step S20, by the reclaimed sand after reaction in 600-
After heating at 900 DEG C, cooling, screening obtains Ester cured alkalescent phenol resin reclaimed sand.
Optionally, the quality of compound remover is the 0.5-5% of the quality of Ester cured alkalescent phenol resin old sand.
Optionally, inorganic acid includes one of hydrochloric acid, phosphoric acid, sulfuric acid and boric acid or any combination；Organic acid includes lemon
One of lemon acid, lactic acid and malic acid or any combination；Inorganic salts include sodium dihydrogen phosphate, sodium bisulfate, ammonium hydrogen carbonate and
One kind or any combination of aluminium chloride.
Optionally, the mass ratio of water, inorganic acid, organic acid and inorganic salts based on pure material is 1:(0.1-0.15):
(0.05-0.1): (0.02-0.05).
Optionally, compound remover further includes stearate, and the mass ratio of water and stearate based on pure material is 1:
(0.02-0.05).
Optionally, compound remover further includes 1-hydroxy ethylidene-1,1-diphosphonic acid, and water and 1-hydroxy ethylidene-1,1-diphosphonic acid are based on pure material
Mass ratio is 1:(0.02-0.05).
Optionally, compound remover further includes Cetyltrimethylammonium bromide, water and Cetyltrimethylammonium bromide
Mass ratio based on pure material is 1:(0.02-0.05).
Optionally, step S10 includes: and is uniformly mixed Ester cured alkalescent phenol resin old sand with compound remover, and
It is heated to pH at 250-500 DEG C as neutral or faintly acid, obtains primary Ester cured alkalescent phenol resin reclaimed sand.
Optionally, heating time is 30-60 minutes in step S20.
Optionally, stearate includes one kind or any combination of aluminum stearate, calcium stearate and zinc stearate.
The regeneration method of Ester cured alkalescent phenol resin old sand provided by the present invention the utility model has the advantages that
The regeneration method of Ester cured alkalescent phenol resin old sand provided in an embodiment of the present invention includes, by Ester cured alkalinity phenol
Urea formaldehyde old sand is uniformly mixed with compound remover, and is chemically reacted after heating at 250-500 DEG C, wherein compound de-
Film includes inorganic acid, organic acid, inorganic salts and water；After reclaimed sand after reaction is heated at 600-900 DEG C, cooling, sieve
Get Ester cured alkalescent phenol resin reclaimed sand.The regeneration method is first by the attachment of Ester cured alkalescent phenol resin old sand surface
Oxide and/or mix be mixed in old sand gather materials in the non-various impurity suitable for casting technique condition, by compound remover into
Row chemical treatment, removes alkaline matter therein, destroys resin membrane structure, obtains after the reaction with loose solid-phase construction again
Greensand, then reclaimed sand after reacting is by high temperature thermal reclamation, during combustion decomposition, so that the resin of reclaimed sand surface porosity
Removal, obtains Ester cured alkalescent phenol resin reclaimed sand.Wherein, due to the addition of inorganic salts, so that subsequent 600-900 DEG C of high temperature
The sand grains adhesion problem for heating obtained Ester cured alkalescent phenol resin reclaimed sand is significantly alleviated.Therefore, provided by the invention
Regeneration method can remove the resin film and basic anhydride of Ester cured alkalescent phenol resin old sand surface attachment, and sand grains is avoided to bond
Problem and residual potassium, sodium problem, the excellent performance of the Ester cured alkalescent phenol resin reclaimed sand guaranteed.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without any creative labor,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of process signal of regeneration method of Ester cured alkalescent phenol resin old sand provided in an embodiment of the present invention
Figure.
Specific embodiment
The present invention provides a kind of regeneration methods of Ester cured alkalescent phenol resin old sand, to solve because of Ester cured alkalinity
Surface resin film is difficult to completely remove during phenolic resin regenerating used, and the Ester cured alkaline phenol formaldehyde tree for causing regeneration to obtain
The performance of rouge reclaimed sand is difficult to problem up to standard.Following will be combined with the drawings in the embodiments of the present invention, in the embodiment of the present invention
Technical solution is clearly and completely described, it is clear that and described embodiments are only a part of the embodiments of the present invention, without
It is whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Every other embodiment obtained is put, shall fall within the protection scope of the present invention.
Technical solution in embodiment in order to enable those skilled in the art to better understand the present invention, and make of the invention real
The above objects, features, and advantages for applying example can be more obvious and easy to understand, with reference to the accompanying drawing to the technology in the embodiment of the present invention
Scheme is described in further detail.The regeneration method of Ester cured alkalescent phenol resin old sand provided by the invention please refers to attached drawing
1, attached drawing 1 shows a kind of process signal of the regeneration method of Ester cured alkalescent phenol resin old sand provided in an embodiment of the present invention
Figure, following specific embodiments one to seven are based on attached preparation flow figure shown in FIG. 1.
Embodiment one
Step S110 selects hydrochloric acid, citric acid, sodium dihydrogen phosphate and water as compound remover raw material, and by water, inorganic
Acid, the mass ratio of organic acid and inorganic salts based on pure material are that 1:0.1:0.05:0.02 is mixed to get compound remover.Ester is hard
Change alkalescent phenol resin old sand to be uniformly mixed with compound remover (account for the quality of Ester cured alkalescent phenol resin old sand 1%), add
Enter to heat 30-40 minutes at 450 DEG C in roller heater and be chemically reacted, until the pH of material is neutral or faintly acid.?
Reclaimed sand after to reaction.
Step S120 discharges after heating the reclaimed sand after reaction 30 minutes at 750 DEG C, cooling, that screening obtains ester is hard
Change alkalescent phenol resin reclaimed sand.
Embodiment two
Step S210 selects hydrochloric acid, citric acid, sodium dihydrogen phosphate, aluminum stearate and water as compound remover raw material, and
The mass ratio of water, inorganic acid, organic acid, inorganic salts and stearate based on pure material is mixed for 1:0.1:0.05:0.02:0.02
Conjunction obtains compound remover.Ester cured alkalescent phenol resin old sand and compound remover (it is old to be accounted for into Ester cured alkalescent phenol resin
The 1% of the quality of sand) it is uniformly mixed, it is added in roller heater and is heated 30-40 minutes at 450 DEG C, chemically reacted to object
The pH of material is neutral or faintly acid.Reclaimed sand after being reacted.
Step S220 discharges after heating the reclaimed sand after reaction 30 minutes at 750 DEG C, cooling, that screening obtains ester is hard
Change alkalescent phenol resin reclaimed sand.
Embodiment three
Step S310 selects hydrochloric acid, citric acid, sodium dihydrogen phosphate, 1-hydroxy ethylidene-1,1-diphosphonic acid and water as compound remover
Raw material, and be 1:0.1 by the mass ratio of water, inorganic acid, organic acid, inorganic salts and 1-hydroxy ethylidene-1,1-diphosphonic acid based on pure material:
0.05:0.02:0.02 is mixed to get compound remover.Ester cured alkalescent phenol resin old sand and compound remover (it is hard to be accounted for into ester
Change the 1% of the quality of alkalescent phenol resin old sand) it is uniformly mixed, it is added in roller heater and is heated 30-40 minutes at 450 DEG C,
Being chemically reacted to the pH of material is neutral or faintly acid.Reclaimed sand after being reacted.
Step S320 discharges after heating the reclaimed sand after reaction 30 minutes at 750 DEG C, cooling, that screening obtains ester is hard
Change alkalescent phenol resin reclaimed sand.
Example IV
Step S410 selects hydrochloric acid, citric acid, sodium dihydrogen phosphate, Cetyltrimethylammonium bromide and water as compound
Remover raw material, and the quality by water, inorganic acid, organic acid, inorganic salts and Cetyltrimethylammonium bromide based on pure material
Than being mixed to get compound remover for 1:0.1:0.05:0.02:0.02.By Ester cured alkalescent phenol resin old sand and compound demoulding
Agent (accounting for the 1% of the quality of Ester cured alkalescent phenol resin old sand) is uniformly mixed, and is added in roller heater and is heated at 450 DEG C
30-40 minutes, being chemically reacted to the pH of material was neutral or faintly acid.Reclaimed sand after being reacted.
Step S420 discharges after heating the reclaimed sand after reaction 30 minutes at 750 DEG C, cooling, that screening obtains ester is hard
Change alkalescent phenol resin reclaimed sand.
Embodiment five
Step S510 selects hydrochloric acid, citric acid, sodium dihydrogen phosphate, aluminum stearate, 1-hydroxy ethylidene-1,1-diphosphonic acid, octadecyl
Trimethylammonium bromide and water are as compound remover raw material, and by water, inorganic acid, organic acid, inorganic salts, stearate, hydroxyl
The mass ratio of ethylene-diphosphonic acid and Cetyltrimethylammonium bromide based on pure material is 1:0.1:0.05:0.02:0.02:
0.02:0.02 is mixed to get compound remover.Ester cured alkalescent phenol resin old sand and compound remover (are accounted for into Ester cured alkalinity
The 1% of the quality of phenolic resin old sand) it is uniformly mixed, it is added in roller heater and is heated 30-40 minutes at 450 DEG C, changed
The pH for learning reaction to material is neutral or faintly acid.Reclaimed sand after being reacted.
Step S520 discharges after heating the reclaimed sand after reaction 30 minutes at 750 DEG C, cooling, that screening obtains ester is hard
Change alkalescent phenol resin reclaimed sand.
Embodiment six
Step S610 selects sulfuric acid, phosphoric acid, lactic acid, malic acid, sodium bisulfate, ammonium hydrogen carbonate, calcium stearate, stearic acid
Zinc, 1-hydroxy ethylidene-1,1-diphosphonic acid and water as compound remover raw material, and by water, inorganic acid, organic acid, inorganic salts, stearate,
The mass ratio of 1-hydroxy ethylidene-1,1-diphosphonic acid and Cetyltrimethylammonium bromide based on pure material is 1:0.15:0.1:0.05:0.05:
0.05:0.05 is mixed to get compound remover.Ester cured alkalescent phenol resin old sand and compound remover (are accounted for into Ester cured alkalinity
The 5% of the quality of phenolic resin old sand) it is uniformly mixed, it is added in roller heater and is heated 30-40 minutes at 500 DEG C, changed
The pH for learning reaction to material is neutral or faintly acid.Reclaimed sand after being reacted.
Reclaimed sand after reaction is heated at 900 DEG C and is discharged after sixty minutes by step S620, cooling, that screening obtains ester is hard
Change alkalescent phenol resin reclaimed sand.
Embodiment seven
Step S710 selects sulfuric acid, boric acid, lactic acid, aluminium chloride, 1-hydroxy ethylidene-1,1-diphosphonic acid, octadecyl trimethyl bromination
Ammonium calcium stearate and water are as compound remover raw material, and by water, inorganic acid, organic acid, inorganic salts, stearate, hydroxyl second
Pitching the mass ratio of di 2 ethylhexyl phosphonic acid and Cetyltrimethylammonium bromide based on pure material is 1:0.12:0.07:0.03:0.04:0.03:
0.04 is mixed to get compound remover.Ester cured alkalescent phenol resin old sand and compound remover (are accounted for into Ester cured alkaline phenol formaldehyde
The 0.5% of the quality of resin bonded sand) it is uniformly mixed, it is added in roller heater and is heated 30-40 minutes at 250 DEG C, carry out chemistry
Reacting to the pH of material is neutral or faintly acid.Reclaimed sand after being reacted.
Step S720 discharges after heating the reclaimed sand after reaction 45 minutes at 600 DEG C, cooling, that screening obtains ester is hard
Change alkalescent phenol resin reclaimed sand.
Embodiment eight
Step S810, select sulfuric acid, hydrochloric acid, boric acid, citric acid, sodium dihydrogen phosphate, aluminium chloride, aluminum stearate and water as
Compound remover raw material, and be 1 by the mass ratio of water, inorganic acid, organic acid, inorganic salts and stearate based on pure material:
0.14:0.09:0.04:0.03 is mixed to get compound remover.Ester cured alkalescent phenol resin old sand and compound remover (are accounted for
The 3% of the quality of Ester cured alkalescent phenol resin old sand) it is uniformly mixed, it is added in roller heater and heats 30-40 at 300 DEG C
Minute, being chemically reacted to the pH of material is neutral or faintly acid.Reclaimed sand after being reacted.
Step S820 discharges after heating the reclaimed sand after reaction 35 minutes at 800 DEG C, cooling, that screening obtains ester is hard
Change alkalescent phenol resin reclaimed sand.
Invention described above embodiment is not intended to limit the scope of the present invention..
Comparative example
Step S010 selects hydrochloric acid, citric acid and water as remover raw material, and by water, inorganic acid and organic acid by pure
The mass ratio of substance meter is that 1:0.1:0.05 is mixed to get remover.Ester cured alkalescent phenol resin old sand (is accounted for remover
The 1% of the quality of Ester cured alkalescent phenol resin old sand) it is uniformly mixed, it is added in roller heater and heats 30-40 at 450 DEG C
Minute, being chemically reacted to the pH of material is neutral or faintly acid.Reclaimed sand after being reacted.
Step S020 discharges after heating the reclaimed sand after reaction 30 minutes at 750 DEG C, cooling, that screening obtains ester is hard
Change alkalescent phenol resin reclaimed sand.
The Ester cured alkalescent phenol resin reclaimed sand and Ester cured alkali that embodiment one to embodiment five and comparative example is obtained
Property phenolic resin fresh sand carry out compression strength experiment.As a result for shown in the following table 1.Wherein, experiment condition: Ester cured alkaline phenol formaldehyde tree
Rouge fresh sand and old sand are certain casting factory Ester cured alkaline phenol formaldehyde sand production line sand, and resin and curing agent are commercial product.Tree
Rouge JF-200, curing agent HQG20.
1 compression strength experimental result of table
From table 1, it can be seen that the crushing resistance for the Ester cured alkalescent phenol resin reclaimed sand for obtaining the embodiment of the present invention
It can compare favourably with fresh sand, reusable performance parameter is fully achieved.This is because inorganic acid, organic acid, inorganic salts
Oxide that the compound remover being mixed to get with water and Ester cured alkalescent phenol resin old sand surface are adhered to and/or mix is mixed in old
Sand gather materials in the non-various impurity suitable for casting technique condition reacted, and be removed.
It is opposite with the compressive property of Ester cured alkalescent phenol resin reclaimed sand that comparative example provides with embodiment one in table 1
Than the compressive property for the Ester cured alkalescent phenol resin reclaimed sand that discovery embodiment one provides is more excellent.This is because embodiment
In one, the addition of inorganic salts sodium dihydrogen phosphate improves the compressive property of Ester cured alkalescent phenol resin reclaimed sand.
It is opposite with the compressive property of Ester cured alkalescent phenol resin reclaimed sand that embodiment one provides with embodiment two in table 1
Than the compressive property for the Ester cured alkalescent phenol resin reclaimed sand that discovery embodiment two provides is more excellent.This is because identical
Under the conditions of, aluminum stearate is increased in embodiment two further improves the crushing resistance of Ester cured alkalescent phenol resin reclaimed sand
Energy.Illustrate that stearate has obvious effect to promotion Ester cured alkalescent phenol resin regenerating used.
It is opposite with the compressive property of Ester cured alkalescent phenol resin reclaimed sand that embodiment one provides with embodiment three in table 1
Than the compressive property for the Ester cured alkalescent phenol resin reclaimed sand that discovery embodiment three provides is more excellent.This is because identical
Under the conditions of, 1-hydroxy ethylidene-1,1-diphosphonic acid is increased in embodiment three further improves the anti-of Ester cured alkalescent phenol resin reclaimed sand
Press performance.
The compressive property of the Ester cured alkalescent phenol resin reclaimed sand provided in table 1 with example IV and embodiment one is opposite
Than the compressive property for the Ester cured alkalescent phenol resin reclaimed sand that discovery example IV provides is more excellent.This is because identical
Under the conditions of, Cetyltrimethylammonium bromide is increased in example IV further improves the regeneration of Ester cured alkalescent phenol resin
The compressive property of sand.
The compressive property of Ester cured alkalescent phenol resin reclaimed sand in embodiment five in table 1 be all embodiments in most
Strong one group, embodiment one to embodiment five are to prepare gained under the same conditions, and embodiment five increases compared with embodiment one
Stearate, 1-hydroxy ethylidene-1,1-diphosphonic acid and Cetyltrimethylammonium bromide are added, have significantly promoted to improve Ester cured alkalinity
The compressive property of phenolic resin reclaimed sand.
In addition to compressive property, the adhesion problem often occurred is heated at high temperature for Ester cured alkalescent phenol resin reclaimed sand.
The Ester cured alkalescent phenol resin reclaimed sand that scheme provided in an embodiment of the present invention obtains is substantially without bonding phenomenon, particle point
It is bright.It is compared with comparative example and embodiment one, finds to joined inorganic salts sodium dihydrogen phosphate in embodiment one, and to de- in comparative example
Inorganic salts are added in only inorganic acid and organic acid, this explanation that film works before high-temperature heating, and the ester that can avoid is hard
Change alkalescent phenol resin reclaimed sand bonding, obtains the clearly demarcated Ester cured alkalescent phenol resin reclaimed sand of particle.
Those skilled in the art will readily occur to of the invention its after considering specification and the disclosure invented here of practice
Its embodiment.The present invention is directed to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are wanted by right
It asks and points out.It should be understood that the scope of the present invention is limited only by the attached claims.
Claims (6)
1. a kind of regeneration method of Ester cured alkalescent phenol resin old sand, which is characterized in that the described method comprises the following steps:
Ester cured alkalescent phenol resin old sand is uniformly mixed with compound remover, and heats at 250-500 DEG C by step S10
Chemically reacted, the reclaimed sand after being reacted, wherein the compound remover include inorganic acid, organic acid, inorganic salts and
Water；
Step S20, after the reclaimed sand after the reaction is heated at 600-900 DEG C, cooling, screening obtains Ester cured alkalinity phenol
Urea formaldehyde reclaimed sand；
The water, the inorganic acid, the mass ratio of the organic acid and the inorganic salts based on pure material are 1:(0.1-0.15):
(0.05-0.1): (0.02-0.05)；
The inorganic acid includes one of hydrochloric acid, phosphoric acid, sulfuric acid and boric acid or any combination；The organic acid includes lemon
One of acid, lactic acid and malic acid or any combination；Inorganic salts include sodium dihydrogen phosphate, sodium bisulfate, ammonium hydrogen carbonate and chlorine
Change one kind or any combination of aluminium；
The compound remover further includes stearate, and the mass ratio of the water and the stearate based on pure material is 1:
(0.02-0.05)；
The step S10 includes:
Ester cured alkalescent phenol resin old sand is uniformly mixed with compound remover, and is heated at 250-500 DEG C during pH is
Property or faintly acid are chemically reacted, the reclaimed sand after being reacted.
2. the regeneration method of Ester cured alkalescent phenol resin old sand according to claim 1, which is characterized in that described compound
The quality of remover is the 0.5-5% of the quality of the Ester cured alkalescent phenol resin old sand.
3. the regeneration method of Ester cured alkalescent phenol resin old sand according to claim 1, which is characterized in that described compound
Remover further includes 1-hydroxy ethylidene-1,1-diphosphonic acid, and the mass ratio of the water and the 1-hydroxy ethylidene-1,1-diphosphonic acid based on pure material is 1:
(0.02-0.05).
4. the regeneration method of Ester cured alkalescent phenol resin old sand according to claim 1, which is characterized in that described compound
Remover further includes Cetyltrimethylammonium bromide, and the water and the Cetyltrimethylammonium bromide are based on pure material
Mass ratio is 1:(0.02-0.05).
5. the regeneration method of Ester cured alkalescent phenol resin old sand according to claim 1, which is characterized in that the step
Heating time is 30-60 minutes in S20.
6. the regeneration method of Ester cured alkalescent phenol resin old sand according to claim 5, which is characterized in that the tristearin
Hydrochlorate includes one kind or any combination of aluminum stearate, calcium stearate and zinc stearate.
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| JP5819551B1 (en) * | 2015-02-18 | 2015-11-24 | 山川産業株式会社 | Artificial sand and sand containing binder for mold |
| CN109967693B (en) * | 2019-05-06 | 2020-09-01 | 北京仁创砂业铸造材料有限公司 | Additive for removing inert film of used casting sand and method for removing inert film of used casting sand |
| CN110125329B (en) * | 2019-05-31 | 2020-08-04 | 南阳仁创砂业科技有限公司 | Regeneration method of used sodium silicate sand |
| CN110434280B (en) * | 2019-09-03 | 2021-01-26 | 南阳仁创砂业科技有限公司 | Regeneration method of inorganic used sand of water glass |
| CN110625060B (en) * | 2019-10-15 | 2020-11-03 | 湖北工业大学 | Phosphate binder modified by hydroxyethylidene diphosphonic acid and preparation method thereof |
| CN110614342B (en) * | 2019-10-24 | 2021-06-22 | 福建省同兴汽车同步器有限公司石狮鸿山分公司 | Regenerative casting precoated sand using waste sand as raw material and preparation process thereof |
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| CN104826983A (en) * | 2015-04-08 | 2015-08-12 | 北京仁创科技集团有限公司 | Alkaline phenolic resin old sand and regeneration method thereof |
| 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 |
| 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 |
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