CN107931516A - A kind of heat cure phosphate casting binder and its preparation and application method - Google Patents
A kind of heat cure phosphate casting binder and its preparation and application method Download PDFInfo
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- CN107931516A CN107931516A CN201711182228.7A CN201711182228A CN107931516A CN 107931516 A CN107931516 A CN 107931516A CN 201711182228 A CN201711182228 A CN 201711182228A CN 107931516 A CN107931516 A CN 107931516A
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- heat cure
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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
- B22C1/18—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 inorganic agents
- B22C1/185—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 inorganic agents containing phosphates, phosphoric acids or its derivatives
Abstract
It is disclosed by the invention to belong to casting technology field, it is specially a kind of heat cure phosphate casting binder and its preparation and application method, which includes following constituent：50%~57% industrial phosphoric acid and 0.035%~0.19% silane coupling agent, the preparation method of the heat cure phosphate casting binder include the following steps：S1：Phosphoric acid and aluminium-hydroxide powder are added in three mouthfuls of reaction kettles；S2：In question response kettle after reaction；S3：Add silicic acid；S4：Add silane coupling agent；S6：Add magnesium carbonate；S7：Magnesium chloride is added, the application method of the heat cure phosphate casting binder includes the following steps：Normal sand and the heat cure phosphate binders are weighed, sand is first added into sand mixer, then slowly pours into binding agent, stirred evenly after adding, which has adhesion strength high, and hardening is fast, the advantages that moisture resistance is good, preparation method is simple, of low cost.
Description
Technical field
The present invention relates to casting technology field, is specially a kind of heat cure phosphate casting binder and its preparation and use
Method.
Background technology
Casting industry is widely used that heat cure (precoated sand) or triethylamine cold-box process manufacture sand core or sand mold at present,
Due to be organic binder bond, the two not environmentally, either room temperature or heat curing process is odorous, to human body hinder
Evil is big, and a large amount of pernicious gases of resin burning generation, belong to the material for progressively forbidding using during pouring metal melt.Phosphate
Binding agent has the characteristics that nontoxic and collapsibility is good, but have compared to traditional as a kind of environmentally protective binding agent
Machine resinoid bond its have and be heating and curing the shortcomings of speed is slow, and sand mold resistance to water soak is poor after curing.So if it is applied to generation
Use can be cured rapidly in a heated condition for organic resin to be needed to solve the problems, such as these.
The present invention phosphate binders are modified using organic acid, inorganic acid and water-soluble high-molecular material, with up to
To the purpose for being obviously improved the hard grittiness energy of phosphate binders heat.
The content of the invention
It is an object of the invention to provide a kind of heat cure phosphate casting binder and its preparation and application method, with solution
Problem certainly proposed in the above background technology.
To achieve the above object, the present invention provides following technical solution：A kind of heat cure phosphate casting binder, the heat
Curing phosphate casting binder includes following constituent：50%~57% industrial phosphoric acid, 9%~12% aluminium hydroxide,
It is 0.75%~2.18% boric acid, 0.66~2.48% citric acid, 0.075%~0.57% silicic acid, 0.075%~0.47% water-soluble
Property high molecular material, 0.75%~3.53% magnesium carbonate, 3.5%~6.5% magnesium chloride, 0.035%~0.19% is silane coupled
Agent and 23%~26% pure water.
Preferably, the water-soluble high-molecular material is polyvinylpyrrolidone, and the molecular weight of polyvinylpyrrolidone
It is powdered for k30 to k90.
Preferably, the silicic acid is solid powdery.
A kind of preparation method of heat cure phosphate casting binder, the preparation side of the heat cure phosphate casting binder
Method includes the following steps：
S1：Phosphoric acid and aluminium-hydroxide powder are added in three mouthfuls of reaction kettles, turn on agitator and heater, slow heating
To 180~200 DEG C；
S2：In question response kettle after reaction, boric acid and citric acid are added in reaction kettle, continues stirring reaction until anti-
Solution in kettle is answered to be transparent, this process is about 15min；
S3：Silicic acid is added, continues stir about 15min, silicic acid powder dissolves, and solution recovers transparent in reaction kettle；
S4：Silane coupling agent is added, continues stir about 10min；
S5：Water-soluble high-molecular material is added, is discharged after continuing stirring reaction about 15min；
S6：Add magnesium carbonate；
S7：Magnesium chloride is added, continues stirring untill being completely dissolved.
A kind of application method of heat cure phosphate casting binder, the user of the heat cure phosphate casting binder
Method includes the following steps：Normal sand and the heat cure phosphate binders are weighed, sand is first added into sand mixer, starts sand mixer,
Then binding agent is slowly poured into, is stirred evenly after adding.
Compared with prior art, the beneficial effects of the invention are as follows：A kind of heat cure phosphate casting that the invention proposes is viscous
Agent and its preparation and application method are tied, which has adhesion strength high, and hardening is fast, and moisture resistance is good
The advantages that, preparation method is simple, of low cost.
Embodiment
The technical solution in the embodiment of the present invention is clearly and completely described below, it is clear that described embodiment
Only part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this area
Art personnel all other embodiments obtained without making creative work, belong to the model that the present invention protects
Enclose.
The present invention provides a kind of heat cure phosphate casting binder, which includes as follows
Constituent：
50%~57% industrial phosphoric acid, 9%~12% aluminium hydroxide, 0.75%~2.18% boric acid, 0.66~2.48%
Citric acid, 0.075%~0.57% silicic acid, silicic acid is solid powdery, 0.075%~0.47% water-soluble high-molecular material,
Water-soluble high-molecular material is polyvinylpyrrolidone, and the molecular weight of polyvinylpyrrolidone for k30 to k90 it is powdered,
0.75%~3.53% magnesium carbonate, 3.5%~6.5% magnesium chloride, 0.035%~0.19% silane coupling agent and 23%~26%
Pure water.
The present invention also provides the preparation method of heat cure phosphate casting binder, it is characterised in that：The heat cure phosphoric acid
The preparation method of salt casting binder includes the following steps：
S1：Phosphoric acid and aluminium-hydroxide powder are added in three mouthfuls of reaction kettles, turn on agitator and heater, slow heating
To 180~200 DEG C；
S2：In question response kettle after reaction, boric acid and citric acid are added in reaction kettle, continues stirring reaction until anti-
Solution in kettle is answered to be transparent, this process is about 15min；
S3：Silicic acid is added, continues stir about 15min, silicic acid powder dissolves, and solution recovers transparent in reaction kettle；
S4：Silane coupling agent is added, continues stir about 10min；
S5：Water-soluble high-molecular material is added, is discharged after continuing stirring reaction about 15min；
S6：Add magnesium carbonate；
S7：Magnesium chloride is added, continues stirring untill being completely dissolved.
The present invention provides a kind of application method of heat cure phosphate casting binder again, and heat cure phosphate casting is viscous
The application method of knot agent includes the following steps：Normal sand and the heat cure phosphate binders are weighed, sand is first added into sand mixer,
Start sand mixer, then slowly pour into binding agent, stirred evenly after adding.
Sand sample, binding agent synthesis and sand sample preparating example are made using the thermmohardening phosphate binders of the present application
It is as follows：
Example one：
85% industrial phosphoric acid 342g, aluminium-hydroxide powder 60g, boric acid 6g, citric acid 4.8g, silicic acid are weighed in proportion
144 grams of 2.04g, PVP1.14 gram, 8.28 grams of magnesium carbonate, 31.2 grams of magnesium chloride, silane coupling agent 0.54g and water；
Preparation process：
1st, 342g industrial phosphoric acids and 60g aluminium-hydroxide powders are added in three mouthfuls of reaction kettles, turn on agitator and heating
Device, is slowly heated to 180~200 DEG C；
2nd, in question response kettle after reaction, 6g boric acid and 4.8g citric acids are added in reaction kettle, continues stirring reaction
Until solution is transparent in reaction kettle, this process is about 15min；
3rd, 2.04g silicic acid is added, continues stir about 15min, silicic acid powder dissolves, and solution recovers transparent in reaction kettle；
4th, silane coupling agent 0.54g is added, is stirred 5 minutes；
5th, PVP1.14 grams is added, continues stir about 30min, PVP gradually dissolves, and solution recovers transparent in reaction kettle；
6th, by magnesium carbonate 8.28 grams of additions, 144 grams of water, stir evenly, be then slowly added into reaction kettle, add follow-up
Continuous 20 points of stirring, untill solution is transparent；
7th, 31.2 grams of magnesium chloride is added, continues stirring 10 minutes, binding agent, that is, synthesis finishes.It is prepared by sand sample：
1000g normal sands are weighed, 30g phosphate binders, first add sand mixer by sand, start mixer, then slowly
Binding agent is poured into, is stirred 2 minutes after adding, the moulding sand mixture then to shake out.Mixture is inserted into polytetrafluoroethylene (PTFE) sample preparation mould
Sand sample is made in tool, puts it into experiment micro-wave oven, closes the door carefully, start micro-wave oven, dry 5 minutes, take out the sand in mould
Sample, prepares 15 samples altogether, and hardening strength can be tested to room temperature by about cooling down 15 minutes or so, taken 3 samples, taken intensity
Average value is the intensity level of sand sample, and remaining sample is put into the humidity room that relative humidity is 40%, takes 3 at regular intervals later
A sample testing intensity, the results are shown in Table 1.
Table 1
Example two：
85% industrial phosphoric acid 330g, aluminium-hydroxide powder 60g, boric acid 7.8g, citric acid 10.14g, silicic acid are weighed in proportion
1.14g, PVP1.74 gram, 11.64 grams of magnesium carbonate, 39 grams, silane coupling agent 0.54g of magnesium chloride, 138 grams of water；
Preparation process：
1st, 330g industrial phosphoric acids and 60g aluminium-hydroxide powders are added in three mouthfuls of reaction kettles, turn on agitator and heating
Device, is slowly heated to 180~200 DEG C；
2nd, in question response kettle after reaction, 7.8g boric acid and 10.14g citric acids are added in reaction kettle, continues to stir
Until solution is transparent in reaction kettle, this process is about 15min for reaction；
3rd, 1.14g silicic acid is added, continues stir about 15min, silicic acid powder dissolves, and solution recovers transparent in reaction kettle；
4th, silane coupling agent 0.54g is added, is stirred 5 minutes；
5th, PVP1.74 grams is added, continues stir about 30min, PVP gradually dissolves, and solution recovers transparent in reaction kettle；
6th, by magnesium carbonate 11.64 grams of additions, 138 grams of water, stir evenly, be then slowly added into reaction kettle, add follow-up
Continuous 20 points of stirring, untill solution is transparent；
7th, 39 grams of magnesium chloride is added, continues stirring 10 minutes, binding agent, that is, synthesis finishes.It is prepared by sand sample：
1000g normal sands are weighed, 30g phosphate binders, first add sand mixer by sand, start mixer, then slowly
Binding agent is poured into, is stirred 2 minutes after adding, the moulding sand mixture then to shake out.Mixture is inserted into polytetrafluoroethylene (PTFE) sample preparation mould
Sand sample is made in tool, puts it into experiment micro-wave oven, closes the door carefully, start micro-wave oven, dry 5 minutes, take out the sand in mould
Sample, prepares 15 samples altogether, and hardening strength can be tested to room temperature by about cooling down 15 minutes or so, taken 3 samples, taken intensity
Average value is the intensity level of sand sample, and remaining sample is put into the humidity room that relative humidity is 40%, takes 3 at regular intervals later
A sample testing intensity, the results are shown in Table 2.
Table 2
Example three：
85% industrial phosphoric acid 324g, aluminium-hydroxide powder 54g, boric acid 9.6g, citric acid 14.88g, silicic acid are weighed in proportion
1.68g, PVP2.28 gram, 15.42 grams of magnesium carbonate, 33 grams, silane coupling agent 1.14g of magnesium chloride, 144 grams of water；
Preparation process：
1st, 324g industrial phosphoric acids and 54g aluminium-hydroxide powders are added in three mouthfuls of reaction kettles, turn on agitator and heating
Device, is slowly heated to 180~200 DEG C；
2nd, in question response kettle after reaction, 9.6g boric acid and 14.88g citric acids are added in reaction kettle, continues to stir
Until solution is transparent in reaction kettle, this process is about 15min for reaction；
3rd, 1.68g silicic acid is added, continues stir about 15min, silicic acid powder dissolves, and solution recovers transparent in reaction kettle；
4th, silane coupling agent 1.14g is added, is stirred 5 minutes；
5th, PVP2.28 grams is added, continues stir about 30min, PVP gradually dissolves, and solution recovers transparent in reaction kettle；
6th, by magnesium carbonate 15.42 grams of additions, 144 grams of water, stir evenly, be then slowly added into reaction kettle, add follow-up
Continuous 20 points of stirring, untill solution is transparent；
7th, 33 grams of magnesium chloride is added, continues stirring 10 minutes, binding agent, that is, synthesis finishes.It is prepared by sand sample：
1000g normal sands are weighed, 30g phosphate binders, first add sand mixer by sand, start mixer, then slowly
Binding agent is poured into, is stirred 2 minutes after adding, the moulding sand mixture then to shake out.Mixture is inserted into polytetrafluoroethylene (PTFE) sample preparation mould
Sand sample is made in tool, puts it into experiment micro-wave oven, closes the door carefully, start micro-wave oven, dry 5 minutes, take out the sand in mould
Sample, prepares 15 samples altogether, and hardening strength can be tested to room temperature by about cooling down 15 minutes or so, taken 3 samples, taken intensity
Average value is the intensity level of sand sample, and remaining sample is put into the humidity room that relative humidity is 40%, takes 3 at regular intervals later
A sample testing intensity, the results are shown in Table 3.
Table 3
Example four：
85% industrial phosphoric acid 318g, aluminium-hydroxide powder 66g, boric acid 12.6g, citric acid 3.96g, silicic acid are weighed in proportion
3.42g, PVP2.82 gram, 21.18 grams of magnesium carbonate, 21 grams, silane coupling agent 1.02g of magnesium chloride, 150 grams of water；
Preparation process：
1st, 318g industrial phosphoric acids and 66g aluminium-hydroxide powders are added in three mouthfuls of reaction kettles, turn on agitator and heating
Device, is slowly heated to 180~200 DEG C；
2nd, in question response kettle after reaction, 12.6g boric acid and 3.96g citric acids are added in reaction kettle, continues to stir
Until solution is transparent in reaction kettle, this process is about 15min for reaction；
3rd, 3.42g silicic acid is added, continues stir about 15min, silicic acid powder dissolves, and solution recovers transparent in reaction kettle；
4th, silane coupling agent 1.02g is added, is stirred 5 minutes；
5th, PVP2.82 grams is added, continues stir about 30min, PVP gradually dissolves, and solution recovers transparent in reaction kettle；
6th, by magnesium carbonate 21.18 grams of additions, 150 grams of water, stir evenly, be then slowly added into reaction kettle, add follow-up
Continuous 20 points of stirring, untill solution is transparent；
7th, 21 grams of magnesium chloride is added, continues stirring 10 minutes, binding agent, that is, synthesis finishes.It is prepared by sand sample：
1000g normal sands are weighed, 30g phosphate binders, first add sand mixer by sand, start mixer, then slowly
Binding agent is poured into, is stirred 2 minutes after adding, the moulding sand mixture then to shake out.Mixture is inserted into polytetrafluoroethylene (PTFE) sample preparation mould
Sand sample is made in tool, puts it into experiment micro-wave oven, closes the door carefully, start micro-wave oven, dry 5 minutes, take out the sand in mould
Sample, prepares 15 samples altogether, and hardening strength can be tested to room temperature by about cooling down 15 minutes or so, taken 3 samples, taken intensity
Average value is the intensity level of sand sample, and remaining sample is put into the humidity room that relative humidity is 40%, takes 3 at regular intervals later
A sample testing intensity, the results are shown in Table 4.
Table 4
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of changes, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (5)
- A kind of 1. heat cure phosphate casting binder, it is characterised in that：The heat cure phosphate casting binder includes as follows Constituent：50%~57% industrial phosphoric acid, 9%~12% aluminium hydroxide, 0.75%~2.18% boric acid, 0.66~2.48% lemon Acid, 0.075%~0.57% silicic acid, 0.075%~0.47% water-soluble high-molecular material, 0.75%~3.53% magnesium carbonate, 3.5%~6.5% magnesium chloride, 0.035%~0.19% silane coupling agent and 23%~26% pure water.
- A kind of 2. heat cure phosphate casting binder according to claim 1, it is characterised in that：The water solubility high score Sub- material is polyvinylpyrrolidone, and the molecular weight of polyvinylpyrrolidone is powdered for k30 to k90.
- A kind of 3. heat cure phosphate casting binder according to claim 1, it is characterised in that：The silicic acid is solid It is powdered.
- A kind of 4. preparation method of heat cure phosphate casting binder, it is characterised in that：Heat cure phosphate casting bonds The preparation method of agent includes the following steps：S1：Phosphoric acid and aluminium-hydroxide powder are added in three mouthfuls of reaction kettles, turn on agitator and heater, are slowly heated to 180~200 DEG C；S2：In question response kettle after reaction, boric acid and citric acid are added in reaction kettle, continues stirring reaction until reaction kettle Interior solution is transparent, this process is about 15min；S3：Silicic acid is added, continues stir about 15min, silicic acid powder dissolves, and solution recovers transparent in reaction kettle；S4：Silane coupling agent is added, continues stir about 10min；S5：Water-soluble high-molecular material is added, is discharged after continuing stirring reaction about 15min；S6：Add magnesium carbonate；S7：Magnesium chloride is added, continues stirring untill being completely dissolved.
- A kind of 5. application method of heat cure phosphate casting binder, it is characterised in that：Heat cure phosphate casting bonds The application method of agent includes the following steps：Normal sand and the heat cure phosphate binders are weighed, sand is first added into sand mixer, is opened Dynamic sand mixer, then slowly pours into binding agent, is stirred evenly after adding.
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Cited By (6)
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|---|---|---|---|---|
| CN108907069A (en) * | 2018-07-27 | 2018-11-30 | 湖北工业大学 | A kind of phosphate binders and preparation method thereof that ferrous sulfate is modified |
| CN109093062A (en) * | 2018-07-27 | 2018-12-28 | 湖北工业大学 | A kind of phosphate binders and preparation method thereof that nano yttrium oxide is modified |
| CN109454200A (en) * | 2018-12-14 | 2019-03-12 | 湖北工业大学 | A kind of phosphate binders liquid curing-agent and its application |
| CN110340278A (en) * | 2019-07-29 | 2019-10-18 | 湖北工业大学 | Heat cure phosphate binders auxiliary material, binder and preparation and application method |
| CN113814347A (en) * | 2020-06-19 | 2021-12-21 | 徐州东鑫铸造有限公司 | Binder for casting and preparation method thereof |
| CN113863581A (en) * | 2021-10-12 | 2021-12-31 | 丛杉杉 | Heat-insulating waterproof coiled material for roof and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108907069A (en) * | 2018-07-27 | 2018-11-30 | 湖北工业大学 | A kind of phosphate binders and preparation method thereof that ferrous sulfate is modified |
| CN109093062A (en) * | 2018-07-27 | 2018-12-28 | 湖北工业大学 | A kind of phosphate binders and preparation method thereof that nano yttrium oxide is modified |
| CN109093062B (en) * | 2018-07-27 | 2022-04-01 | 湖北工业大学 | Nano yttrium oxide modified phosphate binder and preparation method thereof |
| CN108907069B (en) * | 2018-07-27 | 2022-04-01 | 湖北工业大学 | Ferrous sulfate modified phosphate binder and preparation method thereof |
| CN109454200A (en) * | 2018-12-14 | 2019-03-12 | 湖北工业大学 | A kind of phosphate binders liquid curing-agent and its application |
| CN110340278A (en) * | 2019-07-29 | 2019-10-18 | 湖北工业大学 | Heat cure phosphate binders auxiliary material, binder and preparation and application method |
| CN110340278B (en) * | 2019-07-29 | 2021-01-15 | 湖北工业大学 | Thermosetting phosphate binder auxiliary material, binder and preparation and use methods |
| CN113814347A (en) * | 2020-06-19 | 2021-12-21 | 徐州东鑫铸造有限公司 | Binder for casting and preparation method thereof |
| CN113863581A (en) * | 2021-10-12 | 2021-12-31 | 丛杉杉 | Heat-insulating waterproof coiled material for roof and preparation method thereof |
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