CN104907485B - A kind of temperature core box inorganic binder and its preparation method and application - Google Patents
A kind of temperature core box inorganic binder and its preparation method and application Download PDFInfo
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- CN104907485B CN104907485B CN201510340693.3A CN201510340693A CN104907485B CN 104907485 B CN104907485 B CN 104907485B CN 201510340693 A CN201510340693 A CN 201510340693A CN 104907485 B CN104907485 B CN 104907485B
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Abstract
The invention discloses a kind of temperature core box inorganic binder and its preparation method and application, the adhesive is prepared by the raw material of following mass percent：The aqueous silicate solution of 12% 62% modulus 1.2 2.3；The aqueous silicate solution of 12% 62% modulus 2.4 3.5；4% 30% lithium hydroxide aqueous solution；8% 10% aqueous phosphatics；Water surplus are supplied.Gained inorganic binder high mechanical properties of the invention, resistance to water soak is good, coremaking efficiency high.These material non-toxics, tasteless, source is wide, cheap, processing performance is good；100 150 DEG C of coremaking temperature, it is environment-friendly far below hot box and precoated sand coremaking temperature, mild condition.
Description
Technical field
The present invention relates to casting field, and in particular to a kind of temperature core box inorganic binder and its preparation method and application.
Background technology
Core-making technique mainly includes cold-box process, hot box process and precoated sand coremaking at present, and above-mentioned core-making technique is equal
It need to do adhesive using artificial synthetic resin, and existing inorganic binder, complex manufacturing being present, mechanical property is low,
The defects of anti-moisture absorption property is poor, and the core holding time is short, influences popularization and application.
In the prior art, patent CN201210307320.2, a kind of casting silicate inorganic adhesive is disclosed, its institute
The modulus of the sodium metasilicate used is 1.0-1.2, and normal temperature is solid, need to add in reactor material heating being melted to boiling,
Add organic modifiers, boric acid, sodium tripolyphosphate dissolving, mixing, complex manufacturing, while the adhesive mechanical property of gained
Can low, sand compound poor fluidity, resistance to water soak it is poor.
The content of the invention
To solve the above problems, the invention provides a kind of temperature core box inorganic binder and its preparation method and application,
Gained inorganic binder high mechanical properties, resistance to water soak is good, coremaking efficiency high.These material non-toxics, tasteless, source is wide, price
Cheaply, processing performance is good；100-150 DEG C of coremaking temperature, far below hot box and precoated sand coremaking temperature, mild condition, environment
It is friendly.
To achieve the above object, the technical scheme taken of the present invention is：
A kind of temperature core box inorganic binder, is prepared by the raw material of following mass percent：12%-62% modulus
1.2-2.3 aqueous silicate solution；12%-62% modulus 2.4-3.5 aqueous silicate solution；4%-30% lithium hydroxide
The aqueous solution；8%-10% aqueous phosphatics；Water surplus are supplied.
Preferably, it is prepared by the raw material of following mass percent：12%-62% modulus 1.7-2.2 silicate
The aqueous solution；12%-62% modulus 2.4-2.9 aqueous silicate solution；4%-30% lithium hydroxide aqueous solution；8%-10%
Aqueous phosphatic；Water surplus are supplied.
Preferably, described aqueous phosphatic is the sodium pyrophosphate aqueous solution, the potassium pyrophosphate aqueous solution, sodium polyphosphate water
One or more of mixtures in solution.
Preferably, the aqueous silicate solution is sodium silicate aqueous solution.
To solve the above problems, present invention also offers a kind of preparation method of temperature core box inorganic binder, including such as
Lower step：
S1, in advance the modulus 1.2-2.3 that production silicic acid sodium content is 49%-51% sodium silicate aqueous solution, sodium metasilicate contain
The sodium silicate aqueous solution of the modulus 2.4-3.5 for 49%-51% is measured, lithium hydroxide content is that 9%-10% lithium hydroxide is water-soluble
Liquid, phosphate content are 6%-40% aqueous phosphatic, and are respectively charged into respective storage tank；
S2, the formula according to claim 1 weigh each raw material components；
S3, the step S2 modulus 1.2-2.3 sodium silicate aqueous solutions weighed and modulus 2.4-3.5 sodium silicate aqueous solutions are used and determined
Amount pump is squeezed into agitator tank, after stirring and evenly mixing, is quantitatively adding the lithium hydroxide aqueous solution that step S2 is weighed and is mixed, then be quantitatively adding
The aqueous phosphatic that step S2 is weighed mixes, and finally adds water, adjustment viscosity is between 15-40mPas, discharging.
The invention has the advantages that：
Gained inorganic binder high mechanical properties, resistance to water soak is good, coremaking efficiency high.These material non-toxics, tasteless, source
Extensively, it is cheap, processing performance is good；100-150 DEG C of coremaking temperature, far below hot box and precoated sand coremaking temperature, condition temperature
With, coremaking (type) working condition can be significantly improved, ensures that the health of Field Force is environment-friendly, adhesive volatile matter is few,
Casting quality can be ensured；Compared with organic binder, be advantageous to environmental protection.
Embodiment
In order that objects and advantages of the present invention are more clearly understood, the present invention is carried out with reference to embodiments further
Describe in detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to limit this hair
It is bright.
Inorganic binder each component in this specific implementation in comparative example and embodiment is prepared by the following method：
By the sodium metasilicate 1500g and water 1380g of modulus 1.8, load GSH3L autoclaves, start stirring, be warming up to 180 DEG C,
1h is incubated, sodium silicate aqueous solution is obtained, labeled as S1；By the sodium metasilicate 1500g and water 1380g of modulus 1.98, load GSH3L high pressures
Kettle, stirring is started, be warming up to 180 DEG C, be incubated 1h, sodium silicate aqueous solution is obtained, labeled as S2；By the sodium metasilicate 1500g of modulus 2.1
With water 1380g, load GSH3L autoclaves, start stirring, be warming up to 180 DEG C, be incubated 1h, obtain sodium silicate aqueous solution, be labeled as
S3；By the sodium metasilicate 1500g and water 1380g of modulus 2.4, load GSH3L autoclaves, start stirring, be warming up to 180 DEG C, insulation
1h, sodium silicate aqueous solution is obtained, labeled as S4；By the sodium metasilicate 1500g and water 1380g of modulus 2.6, load GSH3L autoclaves, open
Dynamic stirring, is warming up to 180 DEG C, is incubated 1h, sodium silicate aqueous solution is obtained, labeled as S5；By the sodium metasilicate 1500g and water of modulus 2.8
1380g, load GSH3L autoclaves, start stirring, be warming up to 180 DEG C, be incubated 1h, sodium silicate aqueous solution obtained, labeled as S6；
In 3L plastic cups, 2000g running water is added, is stirred with JB-200 types electric blender, 200g lithium hydroxides are added in cup, made
Lithium hydroxide is all dissolved in water, obtains lithium hydroxide aqueous solution, labeled as L1；300g running water is added in 1L plastic cups, is used
JB-200 types electric blender is stirred, and 200g potassium pyrophosphates are added in cup, potassium pyrophosphate is all dissolved in water, obtains pyrophosphoric acid
Aqueous solutions of potassium, labeled as P1；Add in 300g running water, stirred with JB-200 types electric blender, by 48g in 1L plastic cups
Sodium polyphosphate is added in cup, sodium polyphosphate is all dissolved in water, much polyphosphate sodium aqueous solution, labeled as P2；In 1L
300g running water is added in plastic cup, is stirred with JB-200 types electric blender, 18g sodium pyrophosphates are added in cup, made
Sodium pyrophosphate is all dissolved in water, the sodium pyrophosphate aqueous solution is obtained, labeled as P3。
Comparative example 1
S is added in 1L plastic cups1300g, stirred with JB-200 types electric blender；Add P115g, running water 55g
Stir evenly, it is 34mpa.s to measure viscosity.Obtain inorganic binder and be labeled as D1；
Comparative example 2
S is added in 1L plastic cups6300g, stirred with JB-200 types electric blender；Add P115g, running water 55g
Stir evenly, it is 35mpa.s to measure viscosity.Obtain inorganic binder and be labeled as D2；
Embodiment 1
S is added in 1L plastic cups1150g, S5150g, stirred and evenly mixed with JB-200 type electric blender；Add
L165g, stir evenly；Add P115g, running water 25g are stirred evenly, and it is 29mpa.s to measure viscosity.Obtain inorganic binder and be labeled as W1；
Embodiment 2
S is added in 1L plastic cups2100g, S6200g, stirred and evenly mixed with JB-200 type electric blender；Add
L155g, stir evenly；Add P112.5g P27.5g running water 30g is stirred evenly, and it is 30mpa.s to measure viscosity.Obtain inorganic binder mark
It is designated as W2.
Embodiment 3
S is added in 1L plastic cups3110g, S4190g, stirred and evenly mixed with JB-200 type electric blender；Add L160g,
Stir evenly；Add P110g, P27g, P318g running water 11g is stirred evenly, and it is 32mpa.s to measure viscosity.Obtain inorganic binder mark
For W3.
Embodiment 4
Great Lin washed-out sand 1000g, inorganic binder w120g, zirconium matter gaseous oxidation silicon 6g, with laboratory blade mulling
Machine is mixed, and coremaking sand composition is loaded into blasting unit, standard " 8 " type sample experiment mould 100 DEG C of heating in advance, under 0.6Mpa
Coremaking sand composition is injected into standard " 8 " type sample experiment mould with compressed air, under 0.2Mpa, by 120--150 DEG C of heat
Air is blown into standard " 8 " type sample experiment mould, gassing time 30s, opens box coring, manufactures 15 cores, uses hydraulic dynamometer
" 8 " type sample tensile strength is detected, instant tensile strength is surveyed in 60s, removes a peak, a minimum, take remaining 3
The average value of sample；Tensile strength after test specimens are cool after 4h, remove a peak, a minimum, take remaining 3 sample
Average value.5 samples are put into the drier for adding water under dividing plate, covered tightly, 24h is placed, tested for tensile strength, removes one most
High level, a minimum, take the average value of remaining 3 sample.Test data is included in table 1.
Embodiment 5
Great Lin washed-out sand 1000g, inorganic binder w220g, zirconium matter gaseous oxidation silicon 6g, with laboratory blade mulling
Machine is mixed, and coremaking sand composition is loaded into blasting unit, standard " 8 " type sample experiment mould 100 DEG C of heating in advance, under 0.6Mpa
Coremaking sand composition is injected into standard " 8 " type sample experiment mould with compressed air, under 0.2Mpa, by 120--150 DEG C of heat
Air is blown into standard " 8 " type sample experiment mould, gassing time 30s, opens box coring, manufactures 15 cores, uses hydraulic dynamometer
" 8 " type sample tensile strength is detected, instant tensile strength is surveyed in 60s, removes a peak, a minimum, take remaining 3
The average value of sample；Tensile strength after test specimens are cool after 4h, remove a peak, a minimum, take remaining 3 sample
Average value.5 samples are put into the drier for adding water under dividing plate, covered tightly, 24h is placed, tested for tensile strength, removes one most
High level, a minimum, take the average value of remaining 3 sample.Test data is included in table 1.
Embodiment 6
Great Lin washed-out sand 1000g, inorganic binder w320g, zirconium matter gaseous oxidation silicon 6g, with laboratory blade mulling
Machine is mixed, and coremaking sand composition is loaded into blasting unit, standard " 8 " type sample experiment mould 100 DEG C of heating in advance, under 0.6Mpa
Coremaking sand composition is injected into standard " 8 " type sample experiment mould with compressed air, under 0.2Mpa, by 120--150 DEG C of heat
Air is blown into standard " 8 " type sample experiment mould, gassing time 30s, opens box coring, manufactures 15 cores, uses hydraulic dynamometer
" 8 " type sample tensile strength is detected, instant tensile strength is surveyed in 60s, removes a peak, a minimum, take remaining 3
The average value of sample；Tensile strength after test specimens are cool after 4h, remove a peak, a minimum, take remaining 3 sample
Average value.5 samples are put into the drier for adding water under dividing plate, covered tightly, 24h is placed, tested for tensile strength, removes one most
High level, a minimum, take the average value of remaining 3 sample.Test data is included in table 1.
Embodiment 7
Great Lin washed-out sand 1000g, inorganic binder D120g, zirconium matter gaseous oxidation silicon 6g, with laboratory blade mulling
Machine is mixed, and coremaking sand composition is loaded into blasting unit, standard " 8 " type sample experiment mould 100 DEG C of heating in advance, under 0.6Mpa
Coremaking sand composition is injected into standard " 8 " type sample experiment mould with compressed air, under 0.2Mpa, by 120--150 DEG C of heat
Air is blown into standard " 8 " type sample experiment mould, gassing time 30s, opens box coring, manufactures 15 cores, uses hydraulic dynamometer
" 8 " type sample tensile strength is detected, instant tensile strength is surveyed in 60s, removes a peak, a minimum, take remaining 3
The average value of sample；Tensile strength after test specimens are cool after 4h, remove a peak, a minimum, take remaining 3 sample
Average value.5 samples are put into the drier for adding water under dividing plate, covered tightly, 24h is placed, tested for tensile strength, removes one most
High level, a minimum, take the average value of 3 remaining sample.Test data is included in table 1.
Embodiment 8
Great Lin washed-out sand 1000g, inorganic binder D220g, zirconium matter gaseous oxidation silicon 6g, with laboratory blade mulling
Machine is mixed, and coremaking sand composition is loaded into blasting unit, standard " 8 " type sample experiment mould 100 DEG C of heating in advance, under 0.6Mpa
Coremaking sand composition is injected into standard " 8 " type sample experiment mould with compressed air, under 0.2Mpa, by 120--150 DEG C of heat
Air is blown into standard " 8 " type sample experiment mould, gassing time 30s, opens box coring, manufactures 15 cores, uses hydraulic dynamometer
" 8 " type sample tensile strength is detected, instant tensile strength is surveyed in 60s, removes a peak, a minimum, take remaining 3
The average value of sample；Tensile strength after test specimens are cool after 4h, remove a peak, a minimum, take remaining 3 sample
Average value.5 samples are put into the drier for adding water under dividing plate, covered tightly, 24h is placed, tested for tensile strength, removes one most
High level, a minimum, take the average value of 3 remaining sample.Test data is included in table 1.
The inorganic binder mechanical property of table 1 contrasts
The low inorganic binder D of modulus is proved from the mechanical property contrast of table 11Mechanical property is good, but anti-moisture absorption property
Difference；The high inorganic binder D of modulus2Mechanical property is slightly worse, and anti-moisture absorption property is good.The inorganic binder W of compound mode number2Mechanical property
Can be high, anti-moisture absorption property is good.Described above is only the preferred embodiment of the present invention, it is noted that for the art
For those of ordinary skill, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvement
Protection scope of the present invention is also should be regarded as with retouching.
Claims (5)
1. a kind of temperature core box inorganic binder, it is characterised in that be prepared by the raw material of following mass percent：12%-
62% modulus 1.2-2.3 aqueous silicate solution；12%-62% modulus 2.4-3.5 aqueous silicate solution；4%-30%
Lithium hydroxide aqueous solution；8%-10% aqueous phosphatics；Water surplus are supplied；Wherein, the aqueous silicate solution is silicic acid
Sodium water solution.
2. a kind of temperature core box inorganic binder according to claim 1, it is characterised in that by following mass percent
Raw material is prepared：12%-62% modulus 1.7-2.2 aqueous silicate solution；12%-62% modulus 2.4-2.9 silicon
Acid salt aqueous solution；4%-30% lithium hydroxide aqueous solution；8%-10% aqueous phosphatic；Water surplus are supplied.
A kind of 3. temperature core box inorganic binder according to claim 1, it is characterised in that described aqueous phosphatic
For one or more of mixtures in the sodium pyrophosphate aqueous solution, the potassium pyrophosphate aqueous solution, polyphosphoric acids sodium water solution.
4. a kind of preparation method of temperature core box inorganic binder, it is characterised in that comprise the following steps：
S1, in advance the modulus 1.2-2.3 that production silicic acid sodium content is 49%-51% sodium silicate aqueous solution, silicic acid sodium content are
49%-51% modulus 2.4-3.5 sodium silicate aqueous solution, lithium hydroxide content are 9%-10% lithium hydroxide aqueous solution,
Phosphate content is 6%-40% aqueous phosphatic, and is respectively charged into respective storage tank；
S2, the formula according to claim 1 weigh each raw material components；
S3, by the step S2 modulus 1.2-2.3 sodium silicate aqueous solutions weighed and modulus 2.4-3.5 sodium silicate aqueous solution constant displacement pumps
Squeeze into agitator tank, after stirring and evenly mixing, be quantitatively adding the lithium hydroxide aqueous solution that step S2 is weighed and mix, then be quantitatively adding step
The aqueous phosphatic that S2 is weighed mixes, and finally adds water, adjustment viscosity is between 15-40mPas, discharging.
5. the application of a kind of temperature core box inorganic binder as described in claim any one of 1-3, it is characterised in that for temperature
Core box coremaking.
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