CN106607546A - Coated sand recycling method - Google Patents
Coated sand recycling method Download PDFInfo
- Publication number
- CN106607546A CN106607546A CN201610773811.4A CN201610773811A CN106607546A CN 106607546 A CN106607546 A CN 106607546A CN 201610773811 A CN201610773811 A CN 201610773811A CN 106607546 A CN106607546 A CN 106607546A
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- Prior art keywords
- sand
- consumption
- weight portions
- antiquated sand
- antiquated
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
- B22C1/22—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins
- B22C1/2233—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a coated sand recycling method. The coated sand recycling method comprises the steps that waste sand is washed with organic solvent, and is reserved after dried; magnetic separation and sieving treatment are conducted on the washed waste sand, and waste sand M is obtained; the waste sand M is soaked in a sodium hydroxide solution for 10-20 min, and waste sand N is obtained after filtration and drying; the waste sand N is roasted; and the roasted waste sand N is cooled to 100-120 DEG C and is mixed and stirred with phenolic resin, calcium stearate, paraformaldehyde, polyethylene wax and a methenamine solution, and after cooling, coated sand is obtained. The coated sand recycling method is simple in step, small in energy consumption, environmentally friendly and free of pollution, and the obtained recycling coated sand has good mechanical strength.
Description
Technical field
The present invention relates to precoated sand field, more particularly to a kind of method of precoated sand recycling.
Background technology
Precoated sand mainly adopts the selected natural siliceous sand of high-quality for roughing sand, thermoplastic phenolic resin, methenamine and enhancing
Agent is raw material.It is bright and clean in curing rate, demoulding, mobility, collapsibility, cast(ing) surface according to the different technical requirements of user
The aspects such as degree, storage suitably adjustment proportioning, is one of optimum shaping material such as automobile, tractor, hydraulic part.Old precoated sand regeneration
It is to reduce casting cost, improve casting quality, reduce environmental pollution and the important measures for economizing on resources, but how ensures
The excellent mechanical strength of regeneration precoated sand is an important problem.
The content of the invention
The technical problem to be solved is to provide a kind of method of precoated sand recycling, the letter of the method step
Single, energy consumption is little, environment friendly and pollution-free, and obtained regeneration precoated sand possesses excellent mechanical strength.
For achieving the above object, the present invention provides following technical scheme：A kind of method of precoated sand recycling, institute
The method of stating includes：
（1）Antiquated sand is cleaned with organic solvent, it is standby after being dried；
（2）Antiquated sand after cleaning is carried out into magnetic separation and process of sieving, antiquated sand M is obtained；
（3）Antiquated sand M is immersed in into 10-20min in sodium hydroxide solution, antiquated sand N is obtained after filtration drying；
（4）Antiquated sand N is carried out into roasting；
（5）Antiquated sand N after roasting is cooled to into 100-120 DEG C, and with phenolic resin, calcium stearate, paraformaldehyde, polyethylene
Wax, methenamine solution are mixed, and precoated sand is obtained after cooling；Wherein,
Relative to the antiquated sand of 100 weight, the consumption of the phenolic resin is 10-30 weight portions, and the consumption of the calcium stearate is
2-12 weight portions, the consumption of the paraformaldehyde is 5-12 weight portions, and the consumption of the Tissuemat E is 2-7 weight portions, described
The consumption of methenamine solution is 10-18 weight portions.
Preferably, relative to the antiquated sand of 100 weight, the consumption of the phenolic resin is 15-25 weight portions, the stearic acid
The consumption of calcium is 5-8 weight portions, and the consumption of the paraformaldehyde is 7-10 weight portions, and the consumption of the Tissuemat E is 4-5 weights
Amount part, the consumption of the methenamine solution is 14-16 weight portions.
Preferably, the organic solvent is one or more in trichloro ethylene, acetone and ethanol.
Preferably, the concentration of the sodium hydroxide solution is 10-15 weight %.
Preferably, step（4）In the temperature of roasting be 500-550 DEG C, time of roasting is 5-15min.
Preferably, step（5）In cooling by the way of air-cooled.
Preferably, step（2）In the aperture of screen cloth of process of sieving be 40-100 mesh.
It is using the beneficial effect of above technical scheme：The invention provides a kind of method of precoated sand recycling,
Methods described includes：Antiquated sand is cleaned with organic solvent, it is standby after being dried；Antiquated sand after cleaning is carried out into magnetic separation and is sieved
Process, obtain antiquated sand M；Antiquated sand M is immersed in into 10-20min in sodium hydroxide solution, antiquated sand N is obtained after filtration drying；By antiquated sand
N carries out roasting；Antiquated sand N after roasting is cooled to into 100-120 DEG C, and with phenolic resin, calcium stearate, paraformaldehyde, poly- second
Alkene wax, methenamine solution are mixed, and precoated sand is obtained after cooling, and the method step is simple, energy consumption is little, environment friendly and pollution-free,
And obtained regeneration precoated sand possesses excellent mechanical strength.
Specific embodiment
The following detailed description of the preferred embodiment of the present invention.
The specific embodiment of the present invention：
Embodiment 1
（1）Antiquated sand is cleaned with organic solvent, it is standby after being dried；
（2）Antiquated sand after cleaning is carried out into magnetic separation and process of sieving（Sieve process screen cloth aperture be 40 mesh）, given up
Sand M；
（3）Antiquated sand M is immersed in into 10min in 10 weight % sodium hydroxide solutions, antiquated sand N is obtained after filtration drying；
（4）Antiquated sand N is carried out into roasting, the temperature of roasting is 500 DEG C, the time of roasting is 5min；
（5）Antiquated sand N after 100g roastings is cooled to into 100 DEG C, and with 15g phenolic resin, 5g calcium stearates, 7g paraformaldehydes,
4g Tissuemat Es, 14g methenamines solution mix, it is air-cooled after obtain precoated sand.
Embodiment 2
（1）Antiquated sand is cleaned with organic solvent, it is standby after being dried；
（2）Antiquated sand after cleaning is carried out into magnetic separation and process of sieving（Sieve process screen cloth aperture be 100 mesh）, given up
Sand M；
（3）Antiquated sand M is immersed in into 20min in 15 weight % sodium hydroxide solutions, antiquated sand N is obtained after filtration drying；
（4）Antiquated sand N is carried out into roasting, the temperature of roasting is 550 DEG C, the time of roasting is 15min；
（5）Antiquated sand N after 100g roastings is cooled to into 120 DEG C, and with 25g phenolic resin, 8g calcium stearates, 10g paraformaldehydes,
5g Tissuemat Es, 16g methenamines solution mix, it is air-cooled after obtain precoated sand.
Embodiment 3
（1）Antiquated sand is cleaned with organic solvent, it is standby after being dried；
（2）Antiquated sand after cleaning is carried out into magnetic separation and process of sieving（Sieve process screen cloth aperture be 80 mesh）, given up
Sand M；
（3）Antiquated sand M is immersed in into 15min in 15 weight % sodium hydroxide solutions, antiquated sand N is obtained after filtration drying；
（4）Antiquated sand N is carried out into roasting, the temperature of roasting is 520 DEG C, the time of roasting is 10min；
（5）Antiquated sand N after 100g roastings is cooled to into 110 DEG C, and with 20g phenolic resin, 6g calcium stearates, 8g paraformaldehydes,
4.5g Tissuemat Es, 15g methenamines solution mix, it is air-cooled after obtain precoated sand.
Embodiment 4
Method according to embodiment 1 is carried out, and except for the difference that, relative to the antiquated sand of 100g, the consumption of the phenolic resin is 10g,
The consumption of the calcium stearate is 2g, and the consumption of the paraformaldehyde is 5g, and the consumption of the Tissuemat E is 2g, the black Lip river
The consumption of tropine solution is 10g.
Embodiment 5
Method according to embodiment 1 is carried out, and except for the difference that, relative to the antiquated sand of 100g, the consumption of the phenolic resin is 30g,
The consumption of the calcium stearate is 12g, and the consumption of the paraformaldehyde is 12g, and the consumption of the Tissuemat E is 7g, the crow
The consumption of Lip river tropine solution is 18g.
Comparative example 1
Method according to embodiment 1 is carried out, and except for the difference that, relative to the antiquated sand of 100g, the consumption of the phenolic resin is 7g, institute
The consumption for stating calcium stearate is 1g, and the consumption of the paraformaldehyde is 3g, and the consumption of the Tissuemat E is 1g, the Wu Luotuo
The consumption of product solution is 7g.
Comparative example 2
Method according to embodiment 1 is carried out, and except for the difference that, relative to the antiquated sand of 100g, the consumption of the phenolic resin is 35g,
The consumption of the calcium stearate is 15g, and the consumption of the paraformaldehyde is 15g, and the consumption of the Tissuemat E is 12g, described
The consumption of methenamine solution is 22g.
Table 1
| Embodiment is numbered | Resin-coated sand shell mould tensile strength（MPa） |
| Embodiment 1 | 3.1 |
| Embodiment 2 | 3.2 |
| Embodiment 3 | 3.2 |
| Embodiment 4 | 2.6 |
| Embodiment 5 | 2.5 |
| Comparative example 1 | 1.1 |
| Comparative example 2 | 1.3 |
The invention provides a kind of method of precoated sand recycling, methods described includes：Antiquated sand is carried out with organic solvent
Cleaning, it is standby after being dried；Antiquated sand after cleaning is carried out into magnetic separation and process of sieving, antiquated sand M is obtained；Antiquated sand M is immersed in into hydrogen-oxygen
Change 10-20min in sodium solution, antiquated sand N is obtained after filtration drying；Antiquated sand N is carried out into roasting；Antiquated sand N after roasting is cooled to
100-120 DEG C, and mix with phenolic resin, calcium stearate, paraformaldehyde, Tissuemat E, methenamine solution, after cooling
Precoated sand is obtained, the method step is simple, energy consumption is little, environment friendly and pollution-free, and obtained regeneration precoated sand possesses excellent machinery
Intensity.
Above-described is only the preferred embodiment of the present invention, it is noted that for one of ordinary skill in the art
For, without departing from the concept of the premise of the invention, some deformations and improvement can also be made, these belong to the present invention
Protection domain.
Claims (7)
1. a kind of method of precoated sand recycling, it is characterised in that methods described includes：
（1）Antiquated sand is cleaned with organic solvent, it is standby after being dried；
（2）Antiquated sand after cleaning is carried out into magnetic separation and process of sieving, antiquated sand M is obtained；
（3）Antiquated sand M is immersed in into 10-20min in sodium hydroxide solution, antiquated sand N is obtained after filtration drying；
（4）Antiquated sand N is carried out into roasting；
（5）Antiquated sand N after roasting is cooled to into 100-120 DEG C, and with phenolic resin, calcium stearate, paraformaldehyde, polyethylene
Wax, methenamine solution are mixed, and precoated sand is obtained after cooling；Wherein,
Relative to the antiquated sand of 100 weight portions, the consumption of the phenolic resin is 10-30 weight portions, the consumption of the calcium stearate
For 2-12 weight portions, the consumption of the paraformaldehyde is 5-12 weight portions, and the consumption of the Tissuemat E is 2-7 weight portions, institute
The consumption for stating methenamine solution is 10-18 weight portions.
2. the method for precoated sand recycling according to claim 1, it is characterised in that relative to 100 weight portions
Antiquated sand, the consumption of the phenolic resin is 15-25 weight portions, and the consumption of the calcium stearate is 5-8 weight portions, the poly first
The consumption of aldehyde is 7-10 weight portions, and the consumption of the Tissuemat E is 4-5 weight portions, and the consumption of the methenamine solution is
14-16 weight portions.
3. the method for precoated sand recycling according to claim 1, it is characterised in that the organic solvent is trichlorine
One or more in ethene, acetone and ethanol.
4. the method for precoated sand recycling according to claim 1, it is characterised in that the sodium hydroxide solution
Concentration is 10-15 weight %.
5. the method for precoated sand recycling according to claim 1, it is characterised in that step（4）In roasting
Temperature is 500-550 DEG C, and the time of roasting is 5-15min.
6. the method for precoated sand recycling according to claim 1, it is characterised in that step（5）In cooling adopt
With air-cooled mode.
7. the method for precoated sand recycling according to claim 1, it is characterised in that step（2）In place of sieving
The aperture of the screen cloth of reason is 40-100 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610773811.4A CN106607546A (en) | 2016-08-31 | 2016-08-31 | Coated sand recycling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610773811.4A CN106607546A (en) | 2016-08-31 | 2016-08-31 | Coated sand recycling method |
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| Publication Number | Publication Date |
|---|---|
| CN106607546A true CN106607546A (en) | 2017-05-03 |
Family
ID=58614975
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610773811.4A Pending CN106607546A (en) | 2016-08-31 | 2016-08-31 | Coated sand recycling method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107282867A (en) * | 2017-06-21 | 2017-10-24 | 河池市森机械有限责任公司 | Regenerate precoated sand and preparation method thereof |
| CN108380814A (en) * | 2018-05-05 | 2018-08-10 | 侯马市富达造型材料有限公司 | A kind of regeneration precoated sand and preparation method thereof of casting swage part |
| CN110564004B (en) * | 2019-09-17 | 2021-07-06 | 马鞍山市三川机械制造有限公司 | Preparation method for reprocessing rubber and plastic filler by recycling waste resin molding sand |
| CN117123729A (en) * | 2023-07-06 | 2023-11-28 | 江门市新会区金昌矽砂有限公司 | Regeneration preparation process of baozhu sand |
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|---|---|---|---|---|
| JPS5677045A (en) * | 1979-11-26 | 1981-06-25 | Yozo Ishizuka | Technique of recycling casting waste sand containing alkali seed to neutral resource through hot air treatment |
| CN1640981A (en) * | 2004-01-16 | 2005-07-20 | 北京仁创制造技术研究院 | Cladded quartz sand fracturing support agent for oil production |
| DE102007008149A1 (en) * | 2007-02-19 | 2008-08-21 | Ashland-Südchemie-Kernfest GmbH | Thermal regeneration of foundry sand |
| JP2011067867A (en) * | 2009-08-31 | 2011-04-07 | Mitsubishi Motors Corp | Resin coated sand |
| CN102688982A (en) * | 2012-06-12 | 2012-09-26 | 西峡县众德汽车部件有限公司 | Process for roasting waste sand into precoated sand material |
| CN103317084A (en) * | 2013-06-28 | 2013-09-25 | 常州午阳柴油机水箱制造有限公司 | Waste sand recycling equipment and use method thereof |
| CN104162628A (en) * | 2013-05-16 | 2014-11-26 | 雷士文 | Method and device for peeling off attachments on surfaces of waste casting sands |
| CN105081213A (en) * | 2015-09-08 | 2015-11-25 | 台州市陈氏铜业有限公司 | Production technology for precoated sand recycling |
| CN105458163A (en) * | 2014-09-12 | 2016-04-06 | 林州市昊远汽车配件有限公司 | Reclaimed precoated sand and batching system thereof |
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2016
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5677045A (en) * | 1979-11-26 | 1981-06-25 | Yozo Ishizuka | Technique of recycling casting waste sand containing alkali seed to neutral resource through hot air treatment |
| CN1640981A (en) * | 2004-01-16 | 2005-07-20 | 北京仁创制造技术研究院 | Cladded quartz sand fracturing support agent for oil production |
| DE102007008149A1 (en) * | 2007-02-19 | 2008-08-21 | Ashland-Südchemie-Kernfest GmbH | Thermal regeneration of foundry sand |
| JP2011067867A (en) * | 2009-08-31 | 2011-04-07 | Mitsubishi Motors Corp | Resin coated sand |
| CN102688982A (en) * | 2012-06-12 | 2012-09-26 | 西峡县众德汽车部件有限公司 | Process for roasting waste sand into precoated sand material |
| CN104162628A (en) * | 2013-05-16 | 2014-11-26 | 雷士文 | Method and device for peeling off attachments on surfaces of waste casting sands |
| CN103317084A (en) * | 2013-06-28 | 2013-09-25 | 常州午阳柴油机水箱制造有限公司 | Waste sand recycling equipment and use method thereof |
| CN105458163A (en) * | 2014-09-12 | 2016-04-06 | 林州市昊远汽车配件有限公司 | Reclaimed precoated sand and batching system thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107282867A (en) * | 2017-06-21 | 2017-10-24 | 河池市森机械有限责任公司 | Regenerate precoated sand and preparation method thereof |
| CN108380814A (en) * | 2018-05-05 | 2018-08-10 | 侯马市富达造型材料有限公司 | A kind of regeneration precoated sand and preparation method thereof of casting swage part |
| CN110564004B (en) * | 2019-09-17 | 2021-07-06 | 马鞍山市三川机械制造有限公司 | Preparation method for reprocessing rubber and plastic filler by recycling waste resin molding sand |
| CN117123729A (en) * | 2023-07-06 | 2023-11-28 | 江门市新会区金昌矽砂有限公司 | Regeneration preparation process of baozhu sand |
| CN117123729B (en) * | 2023-07-06 | 2024-05-24 | 江门市新会区金昌矽砂有限公司 | Regeneration preparation process of baozhu sand |
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Application publication date: 20170503 |