CN110340278A - Heat cure phosphate binders auxiliary material, binder and preparation and application method - Google Patents

Heat cure phosphate binders auxiliary material, binder and preparation and application method Download PDF

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Publication number
CN110340278A
CN110340278A CN201910689952.1A CN201910689952A CN110340278A CN 110340278 A CN110340278 A CN 110340278A CN 201910689952 A CN201910689952 A CN 201910689952A CN 110340278 A CN110340278 A CN 110340278A
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China
Prior art keywords
sand
auxiliary material
phosphate binders
heat cure
comparative example
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CN201910689952.1A
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CN110340278B (en
Inventor
张友寿
周磊
叶锦瑞
夏露
王性军
刘志红
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Wuhan Jinrui Technology Co ltd
Hubei University of Technology
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Wuhan Jinrui Technology Co ltd
Hubei University of Technology
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C1/00Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/16Compositions 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
    • B22C1/18Compositions 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
    • B22C1/185Compositions 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

The present invention provides heat cure phosphate binders auxiliary material, binder and preparation and application method, heat cure phosphate binders auxiliary material provided by the invention characterized by comprising components I: amino silicane coupling agent;And compositionⅱ: the mixed solution of aqueous solutions of organic acids and surfactant, wherein organic acid is selected from: oxalic acid, citric acid, tartaric acid, surfactant are selected from: dodecyl benzyl dimethyl ammonium chloride, dioctyl sodium sulfosuccinate.After tested, using heat cure phosphate binders auxiliary material provided by the present invention, sand sample curing time is obviously shortened, and prepared sand sample resistance to water soak significantly improves, and shelf stability improves.After the auxiliary material, the liquidity scale of molding sand is promoted to 1.701% by 1.184%, and sand fluidity improves obviously, when carrying out complicated sand core production, can obviously reduce sand core defect, reduces and produce rejection rate, saves production cost, have the effect of highly significant.

Description

Heat cure phosphate binders auxiliary material, binder and preparation and application method
Technical field
The invention belongs to casting fields, and in particular to heat cure phosphate binders auxiliary material, binder and preparation and make Use method.
Technical background
In Foundry Production, organic resin bring problem of environmental pollution is difficult to solve always, phosphate binders conduct A kind of novel casting inorganic binder has the excellent feature of environmental protection and collapsibility, tasteless, nontoxic, free of contamination feature, energy The pollution to environment is enough obviously reduced, improves the working environment of front-line workers.But compared to traditional organic resin binder its It is partially slow with curing rate, the features such as resistance to water soak is poor.For the correlation properties of phosphate binders, relevant auxiliary materials cooperation is researched and developed Binder uses, and improves the performance of phosphate binders to a certain extent, such as accelerates curing rate, is obviously improved anti-moisture absorption Property.How comprehensively modifying phosphate binders, promote the shelf stability of binder sand, and select suitable auxiliary material, improve sand Type curing efficiency reaches requirement identical with traditional organic resin binder, is allowed to meet needs of production, is current There are the problem of.
Summary of the invention
The present invention is to carry out to solve the above-mentioned problems, and it is an object of the present invention to provide a kind of heat cure phosphate binders are auxiliary Material, binder and preparation and application method, auxiliary material cooperation phosphate binders prepared by the present invention are used, can effectively be mentioned Rise comprehensive performance.
The present invention to achieve the goals above, uses following scheme:
<auxiliary material>
The present invention provides a kind of heat cure phosphate binders auxiliary material characterized by comprising components I: amino silane is even Join agent;And compositionⅱ: the mixed solution of aqueous solutions of organic acids and surfactant, wherein organic acid is selected from: oxalic acid, citric acid, Tartaric acid, surfactant are selected from: dodecyl benzyl dimethyl ammonium chloride, dioctyl sodium sulfosuccinate.
Preferably, heat cure phosphate binders auxiliary material provided by the invention can also have the feature that mass ratio group Divide I: component II=26~45:34~56.
Preferably, heat cure phosphate binders auxiliary material provided by the invention can also have the feature that wherein, amino Silane coupling agent is selected from: gamma-aminopropyl-triethoxy-silane KH550, γ-aminopropyltriethoxy diethoxy silane KH902, N- β (aminoethyl)-γ-aminopropyltriethoxy dimethoxysilane KH602, the concentration of oxalic acid aqueous solution are 12.5wt.%, citric acid water The concentration of solution is 33.3wt.%, the concentration of aqueous tartaric acid solution is 20wt.%.
Preferably, heat cure phosphate binders auxiliary material provided by the invention can also have the feature that organic sour water The mass ratio of solution and surfactant is 100:1.
<application method>
Further, the present invention also provides the application methods of heat cure phosphate binders auxiliary material, which is characterized in that including Following steps: (1) first mixing quartz sand with the compositionⅱ in the heat cure phosphate binders auxiliary material, then mixed with components I It is even, it is finally uniformly mixed with phosphate binders and obtains satisfactory molding sand;(2) molding sand is fabricated to sand using core shooter Sample directly heats solidification using mold;Alternatively, molding sand is poured into mold, solidified using microwave heating.
Preferably, the application method of heat cure phosphate binders auxiliary material provided by the invention can also have following spy Sign: when using core shooter, shooting time is 2 seconds, and mold temperature is 150 DEG C.
Preferably, the application method of heat cure phosphate binders auxiliary material provided by the invention can also have following spy Sign: according to the ratio for accounting for sand, phosphate binders dosage is 2.5wt%, and component I dosage is 0.26~0.45wt%, component II Dosage is 0.34~0.56wt%.
<binder>
In addition, the present invention also provides a kind of heat cure phosphate binders, it is characterised in that: use ethylenediamine tetra-acetic acid Disodium and polyvinylpyrrolidone are modified jointly.Matched using the heat cure phosphate binders with auxiliary material as described above It is best to close using effect.
Preferably, the application method of heat cure phosphate binders auxiliary material provided by the invention can also have following spy Sign: disodium ethylene diamine tetraacetate dosage is 1.86wt.%, and polyvinylpyrrolidone dosage is 0.15wt.%.
<preparation method>
Further, the present invention also provides the preparation methods of heat cure phosphate binders, which is characterized in that including as follows Step: (1) being added aqueous povidone solution into material solution, is heated with stirring to 110~120 DEG C;(2) second two is added Amine tetraacethyl disodium powder, continuation heating stirring is transparent limpid to solution, discharging.
The action and effect of invention
After tested, using heat cure phosphate binders auxiliary material provided by the present invention, when sand sample solidifies Between be obviously shortened, prepared sand sample resistance to water soak significantly improves, shelf stability improve.Test shows in 2.5wt% phosphate Bonding agent, 0.26~0.45wt% components I, under 0.34~0.56wt% compositionⅱ additional amount, when using core shooter sample preparation, sand The instant tensile strength of sample is up to 1.47~1.58MPa, and instant bending strength is up to 5.48~5.66MPa, and sand sample is anti-after storage in 72 hours Tensile strength still reaches 1.6~1.8MPa, and bending strength still reaches 5.43~5.6MPa;And solidified using sand sample after auxiliary material Time was foreshortened to 2 minutes by 6 minutes.Sand core under all molding modes can be protected in humidity 70%RH environment storage below Holding intensity does not reduce.After the auxiliary material, the liquidity scale of molding sand is promoted to 1.701% by 1.184%, and sand fluidity changes It is kind obvious, it when carrying out complicated sand core production, can obviously reduce sand core defect, reduce production rejection rate, save production cost, tool There is the effect of highly significant.
Specific embodiment
Below to the tool of heat cure phosphate binders auxiliary material of the present invention, binder and preparation and application method Body embodiment is described in detail.
<embodiment one>
The present embodiment one provide heat cure phosphate binders auxiliary material include:
Components I: gamma-aminopropyl-triethoxy-silane KH550;
Compositionⅱ: 100 parts of oxalic acid aqueous solution (12.5wt.% concentration), 1 part of dodecyl benzyl dimethyl ammonium chloride (for liquid, and active matter content >=45%).
Use experiment core shooter sample preparation:
2000g standard 50-100 mesh quartz sand is weighed, 6g components I and 8g compositionⅱ is weighed, adds them into 2000g standard It is stirred evenly in quartz sand, then weighs 50g phosphate binders and be added in 2000g standard quartz sand, stirred.It will stir Molding sand after mixing pours into blasting unit, and core shooter directly heats solidification sand sample using mold, and shooting time 2 seconds, mold temperature 150 DEG C, and record the sample preparation time.
Sand mold performance test in 1 embodiment one of table
In the present embodiment one, curing time 120s.
As shown in Table 1, after using heat cure phosphate binders auxiliary material provided by the present embodiment one, core shooting is being used When mechanism sample, under the humidity environment of 47%~56%RH, sand sample tensile strength still reaches 1.6MPa after storage in 72 hours, resists Curved intensity still reaches 5.6MPa, and curing time only 120 seconds, i.e., in the case that sand sample strength character is held essentially constant, Curing time is very short.
In addition, the phosphate binders of use match are as follows: industrial phosphoric acid: 52.38 parts in the present embodiment;Aluminium hydrate powder End: 10.54 parts;Silicic acid: 0.62 part;Boric acid: 1.86 parts;Magnesia: 1.24 parts;Water: 31 parts;Copper oxide: 0.31 part;Sulfuric acid Iron: 0.04 part;EDTA-2Na:1.86 parts;PVP:0.15 parts.
Phosphate binders the preparation method comprises the following steps: (1) weighs each component in proportion;PVP powder is dissolved in 100ml water, It is sufficiently stirred to obtain PVP aqueous solution;(2) by industrial phosphoric acid and addition reaction kettle, it is heated to 110~120 DEG C while stirring; (3) aluminium-hydroxide powder is added in reaction kettle, is slowly stirred, temperature is kept to stablize, it is transparent to reaction solution to continue stirring Shape;(4) 50ml water is added, is heated with stirring to 110~120 DEG C;(5) boric acid, silicic acid powder is added, continues heating stirring to reaction Solution is transparent;(6) 50ml water is added, is heated with stirring to 110~120 DEG C;(7) light magnesium oxide powder is added in reaction kettle, It is transparent to reaction solution to continue heating stirring;(8) cupric oxide powder, sulfuric acid iron powder are added in reaction kettle, continue heating and stirs It mixes transparent to reaction solution;(9) 100ml polyvinylpyrrolidone (PVP) aqueous solution is added, is heated with stirring to 110~120 DEG C; (10) disodium ethylene diamine tetraacetate (EDTA-2Na) powder is added, continuation heating stirring is transparent limpid to reaction solution, discharging.
What is used in following embodiment and comparative example is phosphate binders made from the proportion and preparation method.
<embodiment two>
The present embodiment two provide heat cure phosphate binders auxiliary material include:
Components I: gamma-aminopropyl-triethoxy-silane KH550;With
Compositionⅱ: 100 parts of oxalic acid aqueous solution (12.5wt.% concentration), 1 part of dioctyl sodium sulfosuccinate (for liquid, And active matter content >=50%).
Use experiment core shooter sample preparation:
2000g standard 50-100 mesh quartz sand is weighed, 6g components I and 8g compositionⅱ is weighed, adds them into 2000g standard It is stirred evenly in quartz sand, then weighs 50g phosphate binders and be added in 2000g standard quartz sand, stirred.It will stir Molding sand after mixing pours into blasting unit, and core shooter directly heats solidification sand sample using mold, and shooting time 2 seconds, mold temperature 150 DEG C, and record the sample preparation time.
Sand mold performance test in 2 embodiment two of table
In the present embodiment two, curing time 120s.
Shown in table 2 as above, after heat cure phosphate binders auxiliary material provided by the present embodiment two, core shooting is being used When mechanism sample, under the humidity environment of 47%~56%RH, sand sample tensile strength still reaches 1.8MPa after storage in 72 hours, resists The case where curved intensity still reaches 5.43MPa, and curing time only needs 120 seconds, i.e., sand sample strength character is held essentially constant Under, curing time is very short.
<embodiment three>
The present embodiment three provide heat cure phosphate binders auxiliary material include:
Components I: gamma-aminopropyl-triethoxy-silane KH550;With
Compositionⅱ: 100 parts of oxalic acid aqueous solution (12.5wt.% concentration), 1 part of dodecyl benzyl dimethyl ammonium chloride (for liquid, and active matter content >=45%).
Sampling machine sample preparation is hammered using cam-type:
1000g standard 50-100 mesh quartz sand is weighed, 3g components I and 4g compositionⅱ is weighed, adds them into 1000g standard It is stirred evenly in quartz sand, then weighs 25g phosphate binders and be added in 1000g standard quartz sand, stirred.It will stir Molding sand after mixing weighs 185g and pours into cylindrical standard test specimen tube, is tested using cam-type hammering sampling machine, and record Experimental data.
The measurement of sand fluidity:
Experimental method: side opening mass method is selected to carry out fluidity testing, experimental method are as follows: the side of cylindrical standard test specimen tube Face is provided with the aperture of diameter 12mm, weighs in 185g molding sand to test specimen tube, hammers sampling machine using cam-type, hammers 10 times, receives Collect and weigh the sand flowed out in gaging hole, the mass fraction of the total molding sand amount of 185g is accounted for it, it, should as the liquidity scale of molding sand Index value more large surface sand fluidity is better.
The sand fluidity prepared in 3 embodiment three of table
<comparative example one>
In this comparative example one, not use heat cure phosphate binders auxiliary material, remaining method for making sample with embodiment three It is identical:
1000g standard 50-100 mesh quartz sand is weighed, then weighs 25g phosphate binders and 1000g standard quartz sand is added In, it stirs.Molding sand after stirring is weighed 185g to pour into cylindrical standard test specimen tube, is hammered and is made using cam-type Model machine is tested, and records experimental data.
Sand fluidity is measured using with method identical in foregoing embodiments three:
The sand fluidity prepared in 4 comparative example one of table (without using auxiliary material)
<comparative example two>
In this comparative example two, surfactant is not added in auxiliary material, remaining method for making sample is identical with embodiment one:
Use experiment core shooter sample preparation:
2000g standard 50-100 mesh quartz sand is weighed, 6gKH550 and 8g oxalic acid aqueous solution are weighed, is added into 2000g mark It is stirred evenly in quasi- quartz sand, then weighs 50g phosphate binders and be added in 2000g standard quartz sand, stirred.It will Molding sand after stirring pours into blasting unit, and core shooter directly heats solidification sand sample using mold, and shooting time 2 seconds, mold temperature 150 DEG C, and record the sample preparation time.
Performance test: intensity (47%~61%RH constant-humidity house) after test sand sample hardening real-time intensity and storage.Test knot Fruit is as shown in table 5 below:
Sand mold performance test in 5 comparative example two of table
In this comparative example two, curing time 240s.
Embodiment one, embodiment two and comparative example two are compared it is found that embodiment one, embodiment two auxiliary material in plus Enter surfactant rear curing time and shorten half, and the still high excellent performance with tensile strength and bending strength, Make strength reduction there is no the addition because of surfactant.
<comparative example three>
In this comparative example three, any auxiliary material is not used, remaining method for making sample is identical with comparative example two:
Use experiment core shooter sample preparation:
2000g standard 50-100 mesh quartz sand is weighed, then weighs 50g phosphate binders and 2000g standard quartz sand is added In, it stirs.Molding sand after stirring is poured into blasting unit, core shooter directly heats solidification sand sample using mold, penetrates The sand time 2 seconds, 150 DEG C of mold temperature, and record the sample preparation time.
Performance test: intensity (47%~61%RH constant-humidity house) after test sand sample hardening real-time intensity and storage.Test knot Fruit is as shown in table 6 below:
Sand mold performance test in 6 comparative example three (not using auxiliary material) of table
In this comparative example three, curing time 360s.
As shown in table 6, in the case where auxiliary material being not used, when using core shooter sample preparation, the resistance to water soak of sand sample reduces bright Aobvious, under the humidity environment of 47%~62%RH, without using the sand sample of auxiliary material after storage 24 hours, tensile strength is by instant 1.52MPa is reduced to 0.65MPa, and bending strength is reduced to 2.79MPa by instant 4.59MPa.
In contrast, as shown in table 5 in comparative example two, using auxiliary material, sand sample tension after storage in 72 hours Intensity still reaches 1.67MPa, and bending strength still reaches 5.05MPa;And it is shortened using sand sample curing time after auxiliary material 120 seconds.
<comparative example four>
In this comparative example four, solidify sample preparation using 1KW power microwave:
2000g standard 50-100 mesh quartz sand is weighed, 6gKH550 and 8g oxalic acid aqueous solution are weighed, is added into 2000g mark It is stirred evenly in quasi- quartz sand, then weighs 50g phosphate binders and be added in 2000g standard quartz sand, stirred.It will Sand after stirring pours into 8 printed words molds, using microwave heating, and records the sample preparation time.
Performance test: test sand sample hardening real-time intensity and storage intensity (45%~56%RH humidity environment).Test knot Fruit is as shown in table 7 below:
Sand mold performance test in 7 comparative example four (using auxiliary material oxalic acid) of table
In this comparative example four, the microwave curing time is 300s.
<comparative example five>
In this comparative example five, any auxiliary material is not used, remaining method for making sample is identical with comparative example four:
Solidify sample preparation using 1KW power microwave:
2000g standard 50-100 mesh quartz sand is weighed, then weighs 50g phosphate binders and 2000g standard quartz sand is added In, it stirs.Sand after stirring is poured into 8 printed words molds, using microwave heating, and records the sample preparation time.
Performance test: test sand sample hardening real-time intensity and storage intensity (45%~56%RH humidity environment).Test knot Fruit is as shown in table 8 below:
Sand mold performance test in 8 comparative example five (not using auxiliary material) of table
In this comparative example five, the microwave curing time is 390s.
As shown in table 8, in the case where auxiliary material being not used, when using 1KW microwave curing, sand sample is after storage 6 hours, intensity 0.76MPa is reduced to by instant 1.34MPa.
In contrast, using auxiliary material, the resistance to water soak of sand sample is promoted bright as shown in table 7 in comparative example four Aobvious, under the humidity environment of 45%~56%RH, sand sample intensity after storage 48 hours still reaches 1.49MPa;And it uses Sand sample curing time shortens 90 seconds after auxiliary material.
<comparative example six>
In this comparative example six, microwave curing power is 3KW, remaining method for making sample is all identical as comparative example four:
2000g standard 50-100 mesh quartz sand is weighed, 6gKH550 and 8g oxalic acid aqueous solution are weighed, is added into 2000g mark It is stirred evenly in quasi- quartz sand, then weighs 50g phosphate binders and be added in 2000g standard quartz sand, stirred.It will Sand after stirring pours into 8 printed words molds, using microwave heating, and records the sample preparation time.
Performance test: test sand sample hardening real-time intensity and storage intensity (40%~52%RH humidity environment).Test knot Fruit is as shown in table 9 below:
Sand mold performance test in 9 comparative example six (using auxiliary material oxalic acid) of table
In this comparative example six, the microwave curing time is 120s.
<comparative example seven>
In this comparative example seven, any auxiliary material is not used, remaining method for making sample is identical with comparative example six:
Solidify sample preparation using 3KW power microwave:
2000g standard 50-100 mesh quartz sand is weighed, then weighs 50g phosphate binders and 2000g standard quartz sand is added In, it stirs.Sand after stirring is poured into 8 printed words molds, using microwave heating, and records the sample preparation time.
Performance test: test sand sample hardening real-time intensity and storage intensity (40%~52%RH humidity environment).Test knot Fruit is as shown in the following table 10:
Sand mold performance test in 10 comparative example seven (not using auxiliary material) of table
In this comparative example seven, the microwave curing time is 230s.
As shown in table 10, in the case where auxiliary material being not used, using 3KW microwave curing, sand sample is after storage 6 hours, intensity 0.54MPa is reduced to by instant 1.03MPa.
In contrast, using auxiliary material, the resistance to water soak of sand sample is promoted bright as shown in table 9 in comparative example six Aobvious, sand sample intensity still reaches 1.74MPa after storage in 72 hours;And shorten 110 seconds using sand sample curing time after auxiliary material.With Comparative example four is compared to as can be seen that the increase of microwave power causes reaction temperature to increase, it is seen that the use of auxiliary material can be with hoist type The heat resistance of sand can still keep superior performance under high-temperature.
<comparative example eight>
In this comparative example eight, amino silicane coupling agent is used as using γ-aminopropyltriethoxy diethoxy silane (KH902), Remaining method for making sample is all identical as comparative example six:
Solidify sample preparation using 3KW power microwave:
2000g standard 50-100 mesh quartz sand is weighed, 6g KH902 and 8g oxalic acid aqueous solution is weighed, is added into 2000g It is stirred evenly in standard quartz sand, then weighs 50g phosphate binders and be added in 2000g standard quartz sand, stirred. Sand after stirring is poured into 8 printed words molds, using microwave heating, and records the sample preparation time.
Performance test: test sand sample hardening real-time intensity and storage intensity (52%~60%RH humidity environment).Test knot Fruit is as shown in table 11 below:
Sand mold performance test in 11 comparative example eight (KH602) of table
In this comparative example eight, the microwave curing time is 120s.
As shown in table 11, auxiliary using KH902 under the humidity environment of 52%~60%RH when using 3KW microwave curing After material, sand sample intensity still reaches 1.48MPa after storage in 24 hours.
<comparative example nine>
In this comparative example nine, amino is used as using N- β (aminoethyl)-γ-aminopropyltriethoxy dimethoxysilane (KH602) Silane coupling agent, remaining method for making sample are identical with comparative example eight:
Solidify sample preparation using 3KW power microwave:
2000g standard 50-100 mesh quartz sand is weighed, 6g KH602 and 8g oxalic acid aqueous solution is weighed, is added into 2000g It is stirred evenly in standard quartz sand, then weighs 50g phosphate binders and be added in 2000g standard quartz sand, stirred. Sand after stirring is poured into 8 printed words molds, using microwave heating, and records the sample preparation time.
Performance test: test sand sample hardening real-time intensity and storage intensity (52%~60%RH humidity environment).Test knot Fruit is as shown in table 12 below:
Sand mold performance test in 12 comparative example eight (KH602) of table
In this comparative example nine, the microwave curing time is 120s.
As shown in table 12, auxiliary using KH602 under the humidity environment of 52%~60%RH when using 3KW microwave curing After material, sand sample intensity still reaches 1.57MPa after storage in 24 hours.
According to comparative example nine, comparative example eight and comparative example six as can be seen that three kinds of amino coupling agents could act as auxiliary material and make With.
<comparative example ten>
In this comparative example ten, amino silicane coupling agent, lemon are used as using gamma-aminopropyl-triethoxy-silane (KH550) For aqueous acid as auxiliary material, remaining method for making sample is all identical as comparative example eight:
Solidify sample preparation using 3KW power microwave:
2000g standard 50-100 mesh quartz sand is weighed, 6gKH550 and 8g aqueous citric acid solution is weighed, is added into 2000g It is stirred evenly in standard quartz sand, then weighs 50g phosphate binders and be added in 2000g standard quartz sand, stirred. Sand after stirring is poured into 8 printed words molds, using microwave heating, and records the sample preparation time.
Performance test: test sand sample hardening real-time intensity and storage intensity (50%~56%RH humidity environment).Test knot Fruit is as shown in table 13 below:
Sand mold performance test in 13 comparative example ten (KH550+ citric acid) of table
In this comparative example ten, the microwave curing time is 120s.
As shown in table 13, when using 3KW microwave curing, under the humidity environment of 50%~56%RH, citric acid is used After auxiliary material, sand sample intensity still reaches 1.43MPa after storage in 24 hours.
<comparative example 11>
In this comparative example 11, using aqueous tartaric acid solution as auxiliary material, remaining method for making sample and the complete phase of comparative example ten It is same:
Solidify sample preparation using 3KW power microwave:
2000g standard 50-100 mesh quartz sand is weighed, 6gKH550 and 8g aqueous tartaric acid solution is weighed, is added into 2000g It is stirred evenly in standard quartz sand, then weighs 50g phosphate binders and be added in 2000g standard quartz sand, stirred. Sand after stirring is poured into 8 printed words molds, using microwave heating, and records the sample preparation time.
Performance test: test sand sample hardening real-time intensity and storage intensity (52%~60%RH humidity environment).Test knot Fruit is as shown in table 14 below:
Sand mold performance test in 14 comparative example 11 (KH550+ tartaric acid) of table
In this comparative example 11, the microwave curing time is 120s.
As shown in table 14, when using 3KW microwave curing, under the humidity environment of 50%~56%RH, tartaric acid is used After auxiliary material, sand sample intensity still reaches 1.48MPa after storage in 24 hours.
According to comparative example 11, comparative example ten and comparative example six as can be seen that three kinds of aqueous solutions of organic acids could act as it is auxiliary Material uses.
<comparative example 12>
In this comparative example, the range of auxiliary material additional amount is determined based on following 7 schemes.
Solidify sample preparation using 1KW power microwave:
Scheme 1:(0.06wt% amino silicane coupling agent, 0.07wt% aqueous solutions of organic acids) weigh 2000g standard 50- 100 mesh quartz sands, weigh 1.2gKH550 and 1.4g oxalic acid aqueous solution, are added into 2000g standard quartz sand and stir evenly, 50g phosphate binders are weighed again to be added in 2000g standard quartz sand, are stirred.Sand after stirring is poured into 8 printed words In mold, using microwave heating, and the sample preparation time is recorded.
Scheme 2:(0.12wt% amino silicane coupling agent, 0.14wt% aqueous solutions of organic acids) weigh 2000g standard 50- 100 mesh quartz sands, weigh 2.4gKH550 and 2.8g oxalic acid aqueous solution, are added into 2000g standard quartz sand and stir evenly, 50g phosphate binders are weighed again to be added in 2000g standard quartz sand, are stirred.Sand after stirring is poured into 8 printed words In mold, using microwave heating, and the sample preparation time is recorded.
Scheme 3:(0.23wt% amino silicane coupling agent, 0.28wt% aqueous solutions of organic acids) weigh 2000g standard 50- 100 mesh quartz sands, weigh 4.6gKH550 and 5.6g oxalic acid aqueous solution, are added into 2000g standard quartz sand and stir evenly, 50g phosphate binders are weighed again to be added in 2000g standard quartz sand, are stirred.Sand after stirring is poured into 8 printed words In mold, using microwave heating, and the sample preparation time is recorded.
Scheme 4:(0.26wt% amino silicane coupling agent, 0.34wt% aqueous solutions of organic acids) weigh 2000g standard 50- 100 mesh quartz sands, weigh 5.2gKH550 and 6.8g oxalic acid aqueous solution, are added into 2000g standard quartz sand and stir evenly, 50g phosphate binders are weighed again to be added in 2000g standard quartz sand, are stirred.Sand after stirring is poured into 8 printed words In mold, using microwave heating, and the sample preparation time is recorded.
Scheme 5:(0.3wt% amino silicane coupling agent, 0.4wt% aqueous solutions of organic acids) weigh 2000g standard 50-100 Mesh quartz sand weighs 6gKH550 and 8g oxalic acid aqueous solution, is added into 2000g standard quartz sand and stirs evenly, then weighs 50g phosphate binders are added in 2000g standard quartz sand, stir.Sand after stirring is poured into 8 printed words molds In, using microwave heating, and record the sample preparation time.
Scheme 6:(0.45wt% amino silicane coupling agent, 0.56wt% aqueous solutions of organic acids) weigh 2000g standard 50- 100 mesh quartz sands, weigh 9gKH550 and 11g oxalic acid aqueous solution, are added into 2000g standard quartz sand and stir evenly, then claim It takes 50g phosphate binders to be added in 2000g standard quartz sand, stirs.Sand after stirring is poured into 8 printed words molds In, using microwave heating, and record the sample preparation time.
Scheme 7:(0.5wt% amino silicane coupling agent, 0.6wt% aqueous solutions of organic acids) weigh 2000g standard 50-100 Mesh quartz sand weighs 10gKH550 and 12g oxalic acid aqueous solution, is added into 2000g standard quartz sand and stirs evenly, then weighs 50g phosphate binders are added in 2000g standard quartz sand, stir.Sand after stirring is poured into 8 printed words molds In, using microwave heating, and record the sample preparation time
Performance test: test sand sample hardening real-time intensity and storage intensity (48%~54%RH humidity environment) simultaneously carry out pair Than.
Test result is as follows shown in table:
The performance test of molding sand prepared by 15 different auxiliary material additional proportion of table
The microwave curing time of sand mold prepared by 16 different auxiliary material additional proportion of table
From table 15 and 16 it can be seen that scheme 1~3, auxiliary material addition content is lower, curing time is partially long, the anti-moisture absorption of sand sample Property is poor;Scheme 7, auxiliary material addition content is higher, and the molding sand up time is decreased obviously, and causes sand sample integral strength relatively low.It obtains Auxiliary material additional amount optimum range: 0.26~0.45wt% amino silicane coupling agent, 0.34~0.56wt% aqueous solutions of organic acids.
Above embodiments are only the illustration done to technical solution of the present invention.Heat cure phosphorus according to the present invention Hydrochlorate binder auxiliary material, binder and preparation are not merely defined in described interior in the embodiment above with application method Hold, but is defined by the scope defined by the claims..Those skilled in the art of the invention are in the embodiment on the basis of institute Any modify or supplement or equivalence replacement done, all in claim range claimed of the invention.

Claims (10)

1. a kind of heat cure phosphate binders auxiliary material characterized by comprising
Components I: amino silicane coupling agent;With
Compositionⅱ: the mixed solution of aqueous solutions of organic acids and surfactant,
Wherein, organic acid is selected from: oxalic acid, citric acid, tartaric acid,
Surfactant is selected from: dodecyl benzyl dimethyl ammonium chloride, dioctyl sodium sulfosuccinate.
2. heat cure phosphate binders auxiliary material according to claim 1, it is characterised in that:
Wherein, quality is than component I: component II=26~45:34~56.
3. heat cure phosphate binders auxiliary material according to claim 1, it is characterised in that:
Wherein, amino silicane coupling agent is selected from: gamma-aminopropyl-triethoxy-silane KH550, γ-aminopropyltriethoxy diethoxy Silane KH902, N- β (aminoethyl)-γ-aminopropyltriethoxy dimethoxysilane KH602,
The concentration of oxalic acid aqueous solution is 12.5wt.%, the concentration of aqueous citric acid solution is 33.3wt.%, aqueous tartaric acid solution Concentration is 20wt.%.
4. heat cure phosphate binders auxiliary material according to claim 1, it is characterised in that:
Wherein, the mass ratio of aqueous solutions of organic acids and surfactant is 100:1.
5. the application method of heat cure phosphate binders auxiliary material, feature described in any one of Claims 1-4 exist In including the following steps:
(1) quartz sand is first mixed with the compositionⅱ in the heat cure phosphate binders auxiliary material, then is mixed with components I, most It is uniformly mixed afterwards with phosphate binders and obtains satisfactory molding sand;
(2) molding sand is fabricated to sand sample using core shooter, solidification is directly heated using mold;Alternatively, molding sand is poured into mold, Solidified using microwave heating.
6. the application method of heat cure phosphate binders auxiliary material according to claim 5, it is characterised in that:
Wherein, when using core shooter, shooting time is 2 seconds, and mold temperature is 150 DEG C.
7. the application method of heat cure phosphate binders auxiliary material according to claim 5, it is characterised in that:
Wherein, according to the ratio for accounting for sand, phosphate binders dosage is 2.5wt%, and component I dosage is 0.26~0.45wt%, Component II dosage is 0.34~0.56wt%.
8. a kind of heat cure phosphate binders, it is characterised in that:
It is modified jointly using disodium ethylene diamine tetraacetate and polyvinylpyrrolidone.
9. heat cure phosphate binders according to claim 8, it is characterised in that:
Wherein, disodium ethylene diamine tetraacetate dosage is 1.86wt.%, and polyvinylpyrrolidone dosage is 0.15wt.%.
10. the preparation method of heat cure phosphate binders described in claim 8 or 9, which is characterized in that including walking as follows It is rapid:
(1) aqueous povidone solution is added into material solution, is heated with stirring to 110~120 DEG C;
(2) disodium ethylene diamine tetraacetate powder is added, continuation heating stirring is transparent limpid to solution, discharging.
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CN114535500A (en) * 2021-12-31 2022-05-27 北京航空航天大学宁波创新研究院 Modified silica fume suspension for casting, modified water glass and using method

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CN107931516A (en) * 2017-11-23 2018-04-20 武汉锦瑞技术有限公司 A kind of heat cure phosphate casting binder and its preparation and application method
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
CN109550888A (en) * 2018-12-14 2019-04-02 湖北工业大学 A kind of phosphate binders and its preparation and application that disodium ethylene diamine tetraacetate is modified

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