CN107214293B - A method of cast paint is prepared with discarded haydite resin sand - Google Patents
A method of cast paint is prepared with discarded haydite resin sand Download PDFInfo
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- CN107214293B CN107214293B CN201710280821.9A CN201710280821A CN107214293B CN 107214293 B CN107214293 B CN 107214293B CN 201710280821 A CN201710280821 A CN 201710280821A CN 107214293 B CN107214293 B CN 107214293B
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- sand
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- cast paint
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
- B22C5/0409—Blending, mixing, kneading or stirring; Methods therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/06—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sieving or magnetic separating
Abstract
The present invention relates to the methods for preparing cast paint with discarded haydite resin sand: A) casting is passed through into the ceramsite sand reclaimed materials that organic matter, primary screening, crushing and the regrading that roasting is gone in desanding material are processed into partial size less than 800 mesh with the haydite resin sand discarded；B) the recycling sand material in upper step is uniformly mixed with partial size less than the composite aggregate of 500 mesh, refractory aggregate is made, wherein returning sand material accounts for mixture total amount 25 ~ 65%；The composite aggregate is that one or more of kaolin, bauxite, mullite, graphite powder, diatomite arbitrarily compare mixture；C cast paint) is prepared by following mass percent: refractory aggregate 30 ~ 78% obtained in upper step, suspending agent 9 ~ 25%, binder 5 ~ 15%, defoaming agent 0.2 ~ 10%, dispersing agent 5 ~ 15%, preservative 0.5 ~ 5%, surfactant 0.3 ~ 2.3%, above-mentioned component are mixed and stirred for uniformly being configured to viscous liquid coating.
Description
Technical field
The present invention relates to casting antiquated sand material recovery and reuse technology, in particular to a kind of discarded haydite resin sand system
The method of standby cast paint.
Background technique
Due to raw material sources are wide, mature preparation process and process are simple, performance is stable and low pollution and structure can
The features such as control, ceramsite sand become new after quartz sand, chromite sand, zircon sand, emergy, olivine sand, nice foundry sand etc.
Mold casting sand becomes large-scale 3D foundry enterprise and is used widely.But the ceramsite sand still generates a large amount of give up after pouring
Abandon sand, the secondary recovery that is processed into of this discarded sand is not thorough and restriction the problems such as circular regeneration process energy consumption is high, can only be with
The landfill of extensive style or the modes such as pave the way are handled.Simultaneously as the resin solidifications such as phenolic aldehyde, furans and ureaformaldehyde class in modeling process
When agent component and cast molding because high temperature occur part crystal transition or low-melting alloy influence so that waste resin sand at
Divide complexity, volatile content excessively high, exist and be difficult to directly reuse, if long-term stack leads to secondary environmental pollution problem
Also it can not be ignored.
Application publication number, which has been the patent specification of 104741515 A of CN, discloses one kind by foundry resin sand regeneration power powder
The cast paint of dirt preparation, foundry resin reclaimed sand is mixed with components such as bauxite, clay-bonded sand, water-glass sands, is made and is disappeared
Die cast aggregate realizes the circular regeneration application of Foundry.But the technology only passes through the machinery sides such as preliminary screening, grinding
Formula carries out easy physical mixed, processing is not modified to antiquated sand, so its cast paint properties obtained is poor, no
It can be used in the casting of high quality casting.For another example application publication number be 105964884 A of CN " a kind of resin sand of casting and
Preparation method " it is described, by techniques such as crushing, screening, magnetic separation and mullings, prepare with discarded resin sand, quartz sand, furan
Furane resins, the casting resin sand that silane reinforcing agent is main component.It is also only simple to discarded resin sand in this method to crush,
Screening.Organic matter quality is not handled, the regenerating resin sand unstable quality of preparation.
Summary of the invention
The object of the present invention is to provide a kind of methods for preparing cast paint with discarded haydite resin sand, discarded to optimize
The technique of the cycling and reutilization of haydite resin sand, and solve the environmental pollution in a large amount of discarded haydite base resin sand processing.
The object of the present invention is achieved like this, a method of cast paint being prepared with discarded haydite resin sand, is wrapped
Include following steps:
A) will organic matter that casting is gone in desanding material with discarded haydite resin sand by roasting, primary screening, crush and
Regrading is processed into recycling sand material of the partial size less than 800 mesh, and the mass component content of the recycling sand material is SiO2 45.0~
55.0 %、Al2O3 35.0~45.0 %、Fe2O3 1.8~3.5 %、CaO+MgO 0.1~1.0 %、K2O+Na20.1 ~ 1.0 % of O,
Igloss amount is 5.0 ~ 10.0 %, wherein the mixture of CaO and the MgO above-mentioned dosage mixed for arbitrary proportion, K2O and Na2O is to appoint
The mixture of the above-mentioned dosage of meaning ratio mixing；
B) the recycling sand material in upper step is uniformly mixed with partial size less than the composite aggregate of 500 mesh, refractory aggregate is made,
In return sand sand material account for the 25 ~ 65% of mixture total amount；The composite aggregate is kaolin, bauxite, mullite, graphite powder, diatom
One or more of soil arbitrarily compares mixture；
C) cast paint is prepared by following mass percent: refractory aggregate 30 ~ 78% obtained in upper step, suspending agent 9 ~
25%, binder 5 ~ 15%, defoaming agent 0.2 ~ 10%, dispersing agent 5 ~ 15%, preservative 0.5 ~ 5%, surfactant 0.3 ~ 2.3%, on
Component is stated to be mixed and stirred for uniformly being configured to viscous liquid coating.
Of the invention is prepared in the method for cast paint with discarded ceramsite sand, and discarded ceramsite sand is fired, once
Screening, crushing and regrading processing, effectively remove volatile matter, cull, binder and other attachments in sand material,
And keeping granule-morphology more regular, granularity and distribution are more uniform, and processed sand material ingredient is uniform, and microstructure is stablized, and makees
Heat-resisting aggregate in cast paint realizes that the maximization of recycling sand material recycles.
To completely remove impurity in sand material, and homogenize sand material structure, the step A) in roasting process in, will be different
The discarded haydite resin sand of batch is uniformly mixed by the method for mechanical mixture to be placed on vacuum and bakes in furnace, -0.01MPa with
Under vacuum condition under, under be warming up to 600 DEG C ~ 900 DEG C and keep the temperature 30 ~ 120min, blow-on again is then cooled to room temperature in furnace and is taken
Out；After being fired processing, adsorbate, curing agent, binder, the volatile matter, low melting point of haydite base resin sand particle surface are discarded
The components such as alloy and common volatile organic matter, CO2Gas, the shape that desorption or easy diffused lightweight micronic dust occurs
Formula, it is peeling-off with ceramsite sand body granules.The apparent state of ceramsite sand body granules becomes brown white, black level by black
It obviously shoals, and the surface for roasting sand no longer generates floating dust object, steps up the purity of sand material.And roasting technique is to raising
The thermal coefficient of chiltern, the mechanical property during enhancing collision, friction and shearing etc., and the coating of improvement cast paint are steady
It is qualitative that there is facilitation.
For convenient for the classification except the ceramsite sand after matter is handled and used, in a screening process, by the pellet after roasting
The use of standard screen mesh number is 140 mesh, 200 mesh and 325 mesh three-level ultrasonic linear vibrating screen gradation sizings, partial size is greater than 200
The regeneration for continuing on for foundry sand after the classification separation of purpose sand material uses, and partial size is carried out postorder powder less than 200 mesh sand material
Broken and regrading.By a screening process, can will press grain size grading except the sand material after matter, greater than 200 mesh pellet after
Continue for foundry sand, it can be by different partial size ratio requirements in different casting model powder material regeneration；Partial size is less than 200 mesh
Sand material further press grain size grading, be convenient for recycling and reusing.
The crushing process；200 mesh sand material below is subjected to powder processing by ball grinder, then passes through crushed material
The vibrating screen of 800 mesh carries out regrading and obtains the ceramsite sand reclaimed materials less than 800 mesh.Wherein, the purpose of crushing is to roast
Whole haydite sand grains including ball-type, spheroid shape, nearly ball-type and random that burning obtains carry out crushing activation, so that the table of particle
Larger change occurs for face pattern, has especially better met cast paint configuration proportion and has wanted to mesoporous characteristic and specific surface area
It asks.During crushing and regrading, ratio allotment is carried out to the screening sand grains of different meshes, and then lure that crushing process produces into
Raw shear transfer effect, improves, and part agglomerated particle is promoted to solve convenient for the microporous properties etc. to body granules
Poly- phenomenon keeps the dispersion degree of each material system more uniform and serialization.Meanwhile because grinding aid dielectric loss introduces in crushing process
Impurity composition, then in the form of sieve residue remove.
To advanced optimize disintegrating process, in the crushing process, the abrading-ball in ball grinder: material mass ratio is (3 ~ 7): 1,
The sphere diameter size that abrading-ball is added is respectively 28mm, 14mm and 5mm, and the weight ratio of each sphere diameter abrading-ball is (1 ~ 5): (1 ~ 3): (1 ~ 3).
To improve crushing rear material quality, in the crushing process, 200 ~ 325 mesh recycle sand material and partial size less than 325 mesh
Recycling sand material quality usage ratio are as follows: 1:(0.5 ~ 2.5).
As a preference of the present invention, the granularity of the suspending agent is the sodium bentonite of 200 ~ 800 mesh, attapulgite, tires out
Hold in the palm the mixture of any ratio of one or more of stone clay.
As a preference of the present invention, the granularity of the binder is waterglass, silica solution, the biphosphate of 200 ~ 800 mesh
The mixture of one or more of aluminium, calgon.
As a preference of the present invention, the defoaming agent is one or more of n-butanol, n-amyl alcohol and n-octyl alcohol
The mixture of any ratio.
As a preference of the present invention, the preservative is thymol, pentachlorophenol, penta sodium pentachlorophenate, one in industrial formol
The mixture of kind or two or more any ratios.
As a preference of the present invention, the surfactant be sodium alkyl benzene sulfonate, it is polyvinyl chloride Zhong Xin phenolic ether -10, secondary
The mixture of any ratio of one or more of octyl phenyl Ethoxylate.
As a preference of the present invention, the dispersing agent is water.
Specific embodiment
Embodiment 1
Discarded haydite base resin sand mixing is carried out first: taking five batch waste resin sands of Batch Process each respectively
70Kg is successively loaded into the tapered batch mixer that processing capacity is 500Kg, closed-type feed mouth.Slewing rate 200rpm is set, it is right
Power 0.5KW is answered, the processing time is 30min, and mixed mode is after the continuous mixing of 5min progress positive and negative alternate, 30min
Terminate the technique.Then to mixture roasting: the 350Kg black being blended in upper step being discarded sand and is loaded into box atmosphere roaster
Interior, closed fire door, being adjusted to vacuum degree is-0.01MPa, opens vacuum program, is warming up to 600 DEG C in 30-40min, constant temperature
75min closes negative pressure and takes out roasting sand after being cooled to room temperature in furnace.Followed by will to roasting sand from feed inlet be loaded into three-level
In ultrasonic activation sieve, wherein the mesh number that uses of three-level sieve is 140 mesh, 200 mesh and 325 mesh, corresponding ultrasonic power be 60W,
350W and 850W.Being vibrated to when no longer generating sieve residue terminates to sieve.140 mesh feedings, 140 ~ 200 mesh middle materials are sorted out,
The regeneration for being back to moulding sand for casting uses；It is collected separately at postorder by sand material among 200 ~ 325 mesh and less than 325 mesh sand material
Reason.Sand material after primary screening is subjected to crushing and regrading, specially according to the ratio for accounting for horizontal ball grinder quality carrying capacity 50%
Example inventory, by 200 ~ 325 mesh centre sand material and the following sand material of 325 meshes in the screening of step level-one, according to the matter of 1.0:0.5
Amount ratio weighs 56.7Kg and 28.3Kg respectively and is loaded into high-speed horizontal ball grinder.Control ball material mass ratio 3:1, i.e. ball weight
255.0Kg.The zirconium oxide medicine ball of reselection diameter 28mm, 14mm and 5mm make mill and are situated between, according to mass ratio 1:1:3, i.e. additive amount
Respectively 51Kg, 51Kg and 153Kg after precise, are added sequentially in ball grinder.Meanwhile closed tank mouth and be placed on turn
On axis.Frequency conversion knob is opened, sets slewing rate as 600rpm, corresponding power is 1.5KW, and the processing time is 12.0h, crushes mould
Formula is unidirectional continuous operation, terminates the technique after 12.0h, and crushed material is transferred to 800 mesh, the ultrasonic wave of corresponding power 1200W
Screening process in vibrating screen, until sieve residue is no longer reduced, sieving lower sand material is the ceramsite sand reclaimed materials after impurity.
Embodiment 1 is corresponding in constituent content such as table 1 of the present embodiment through above-mentioned removal of impurities treated ceramsite sand reclaimed materials
Shown in row in the range of standard ceramsite sand, both meets the quality requirement of recycling sand, also comply with fire resisting bone in cast paint
The component requirements of material.
By after above-mentioned removal of impurities ceramsite sand reclaimed materials and kaolin according to mass ratio be 45:55 group component, weigh respectively
Ceramsite sand reclaimed materials 22.5Kg and granularity are used as compound fire resisting bone less than 800 mesh kaolin aggregate 27.5Kg after being sufficiently mixed
Material, then compound refractory aggregate in mass ratio: suspending agent: binder: defoaming agent: binder: preservative 54%:
The ratio of 17%:10%:5.1%:2.7%:1.3% weighs compound refractory powder 27.0Kg, suspending agent sodium bentonite respectively
6.0Kg, CMC2.5Kg, 800 mesh of granularity；Binder polyvinyl alcohol 5.00Kg, 800 mesh of granularity；Defoaming agent n-butanol 2.55Kg；It is anti-
Rotten agent thymol 1.35Kg；Sodium alkyl benzene sulfonate 0.65Kg.The above raw material are successively added to and accounts for coating total mass fraction and is
10%, i.e., it mixes in the agitator containing 5.0Kg tap water, until liquid material terminates for viscous liquid.Coating stands 5min, measures
Baume degrees is 65 ° of B '；The cylinder test block of dip-coating is placed in microwave drying equipment and handles 5min, obtaining coating layer thickness is
0.20mm.Reflect that refractoriness, the present embodiment refractoriness are 1460 DEG C by the criterion of acceptability part casting after cast molding.According to row
Industry standard " JB/T 9226-2008 sand casting coating " measure applying coating, drying, it is cooling after appearance of coat, wearability and
High temperature sudden-heat crackle grade, for test block surface without removing, coating wear-resisting value is 0.3g (64r), belongs to I grade standard.Test result such as table 2
It is shown.
Embodiment 2
Discarded haydite base resin sand mixing is carried out first: taking five batch waste resin sands of Batch Process each respectively
70Kg is successively loaded into the tapered batch mixer that processing capacity is 500Kg, closed-type feed mouth.The power setting for welding mixed machine is
2.1KW, the processing time is 10min, and sets mixed mode as the continuous mixing of no positive and negative alternate, terminates the technique after 10min；
Then mixture roasting is carried out, the 350Kg black being blended in upper step is discarded into sand and is loaded into box atmosphere roaster, sealed furnace
Door, vacuum degree are -0.05MPa.Calcination procedure curve is set, 300 DEG C, constant temperature 120min are warming up in 90min, to cold in furnace
But roasting sand is taken out to after room temperature, closing negative pressure.Then roasting sand will be loaded into three-level ultrasonic activation sieve from feed inlet,
The mesh number that middle three-level sieve uses is 140 mesh, 200 mesh and 325 mesh, be vibrated to the amount to sieve residue it is constant when terminate to sieve.Sorting
140 mesh feedings, 140 ~ 200 mesh middle materials out, the regeneration for continuing on for moulding sand for casting use；By sand among 200 ~ 325 mesh
Material and granularity are collected separately less than 325 mesh sand material for postorder processing.By the sand material after above-mentioned primary screening carry out crush and
Regrading, specially according to the ratio inventory for accounting for horizontal ball grinder quality carrying capacity 30%, by level-one sieve in 200 ~ 325 mesh
Intermediate sand material and the following sand material of 325 meshes weigh 20.4Kg and 30.6Kg respectively and load according to the mass ratio of 1.0:1.5
Enter in high-speed horizontal ball grinder, controls ball material mass ratio 7:1, i.e. ball weight 355.0Kg.Reselection diameter 28mm, 14mm and 5mm's
Zirconium oxide medicine ball makees mill and is situated between, and according to mass ratio 5:3:3, i.e. additive amount is respectively 161.4Kg, 96.8Kg and 96.8Kg, successively
It is added in ball grinder.Meanwhile be placed in shaft after closed tank mouth, open frequency conversion knob, set slewing rate as
2000rpm, corresponding power are 0.5KW, and the processing time is 0.5h, and crushing mode is unidirectional continuous operation, terminate the work after 0.5h
Skill.Crushed material is transferred to 800 mesh, the ultrasonic activation of corresponding power 300W carries out screening process, until sieve residue is no longer in sieving
Until reduction, sieving lower sand material is the ceramsite sand reclaimed materials after impurity.
Embodiment 2 is corresponding in constituent content such as table 1 of the present embodiment through above-mentioned removal of impurities treated ceramsite sand reclaimed materials
Shown in row, component content in the range of standard ceramsite sand, both meets the quality requirement of recycling sand, also complies with casting
The component requirements of refractory aggregate in coating.
By after above-mentioned removal of impurities ceramsite sand reclaimed materials and granularity less than the bauxite of 600 mesh according to mass ratio be 40:60
Group component weighs ceramsite sand reclaimed materials 20.0Kg and bauxite aggregate 30.0Kg respectively, and compound fire resisting is used as after being sufficiently mixed
Aggregate, then compound refractory aggregate in mass ratio: suspending agent: binder: defoaming agent: binder: preservative are as follows: 30%:
The ratio of 25%:15%:10%:5%:2.3% weighs compound refractory powder 15.0Kg respectively；Suspending agent attapulgite 12.5Kg,
325 mesh of granularity；Water glass of binder 7.5Kg, 800 mesh of granularity；Defoaming agent n-amyl alcohol 5.0Kg；Preservative pentachlorophenol 2.5Kg；
Secondary -10 1.15Kg of octane ether of polyvinyl chloride.It is 15% that the above raw material, which are successively added to, and account for coating total mass fraction, i.e.,
It is mixed in the agitator of 7.5Kg tap water, until liquid material terminates for viscous pasty state.Coating stands 5min, and measuring Baume degrees is 47 ° of B
´；The cylinder test block of dip-coating is placed in microwave drying equipment dry 5min, obtaining coating layer thickness is 0.14mm.By being cast into
Criterion of acceptability part casting after type reflects that refractoriness, the present embodiment refractoriness are 1476 DEG C.According to professional standard " JB/T 9226-
2008 sand casting coating " appearance of coat, wearability and high temperature sudden-heat crackle grade after applying coating, drying, cooling are measured,
Test block surface precision is high, without peeling, and coating wear-resisting value is 0.4g (64r), belongs to I grade standard.Test result is as shown in table 2.
Embodiment 3
Discarded haydite base resin sand mixing is carried out first: taking five batch waste resin sands of Batch Process each respectively
70Kg is successively loaded into the tapered batch mixer that processing capacity is 500Kg, closed-type feed mouth.Slewing rate 850rpm is set, it is right
Power 3.75KW is answered, the processing time is 60min, and mixed mode is after the continuous mixing of 5min progress positive and negative alternate, 60min
Terminate the technique.Then to mixture roasting: the 350Kg black that upper step is obtained discards sand and is loaded into box atmosphere roaster
Chamber, closed fire door, adjustment vacuum degree are -0.03MPa.Start vacuum baking program, 900 DEG C is warming up in 60min, constant temperature
75min closes negative pressure and takes out roasting sand after being cooled to room temperature in furnace.Followed by will to roasting sand from feed inlet be loaded into three-level
In ultrasonic activation sieve, wherein the mesh number that uses of three-level sieve is 140 mesh, 200 mesh and 325 mesh, corresponding ultrasonic power be 300W,
100W and 1500W.Be vibrated to sieve residue amount it is constant when terminate to sieve.140 mesh feedings, 140 ~ 200 mesh middle materials are sorted out,
Regeneration for moulding sand for casting uses；Sand material among 200 ~ 325 mesh and granularity are collected separately in the sand material of 325 mesh and are used for
Postorder processing.Sand material after primary screening crush and regrading, specially according to accounting for horizontal ball grinder quality carrying capacity
10% ratio inventory, by level-one sieve in sand material and the following sand material of 325 meshes among 200 ~ 325 mesh, according to 1.0:2.5
Mass ratio, weigh 4.9Kg and 12.1Kg respectively and be loaded into high-speed horizontal ball grinder, control ball material mass ratio 5:1, i.e. ball
Weight 85.0Kg.The zirconium oxide medicine ball of reselection diameter 28mm, 14mm and 5mm make mill and are situated between, and are that 1:1:1 divides according to mass ratio
It Wei not 28.3Kg, 28.3Kg and 28.3Kg.After precise, successively it is added in ball grinder.Closed tank mouth is simultaneously placed on shaft
On.Frequency conversion knob is opened, sets slewing rate as 1000rpm, corresponding power is 2.5KW, and the processing time is 25.0h, crushes mould
Formula is unidirectional continuous operation, terminates the technique after 12.0h, and crushed material is transferred to 800 mesh, the ultrasonic wave of corresponding power 1200W
Screening process in vibrating screen, until sieve residue is no longer reduced, sieving lower sand material is the ceramsite sand reclaimed materials after removal of impurities.
Embodiment 3 is corresponding in constituent content such as table 1 of the present embodiment through above-mentioned removal of impurities treated ceramsite sand reclaimed materials
Shown in row in the range of the casting ceramsite sand of standard, both meets the quality requirement of recycling sand, also comply in cast paint
The component requirements of refractory aggregate.
By after above-mentioned removal of impurities ceramsite sand reclaimed materials and granularity less than the mullite of 325 mesh according to mass ratio be 30:70
Group component weighs ceramsite sand reclaimed materials 15Kg and granularity less than 800 mesh mullite aggregate 35Kg, as multiple after being sufficiently mixed respectively
Mould assembly refractory aggregate, then compound refractory aggregate in mass ratio: suspending agent: binder: defoaming agent: binder: anti-corrosion
Agent is the ratio of 78%:9%:5%:0.2%:0.5%:0.3%, weighs the above-mentioned compound refractory powder 39.0Kg mixed respectively；
Suspending agent Rectorite 4.5Kg, 600 mesh of granularity；Adhesive silicon sol 2.5Kg；Defoaming agent n-octyl alcohol 0.1Kg；Preservative five
Diclophenac sodium 0.25Kg；The poly- ammonia vinethene 0.15Kg of secondary octyl phenyl.The above raw material, which are successively added to, accounts for coating total mass fraction
It is 5%, i.e., is mixed in the agitator of content 2.5Kg tap water, until liquid material terminates for viscous pasty state.Coating stands 5min, measures wave
U.S. degree is 69 ° of B '；The cylinder test block of dip-coating is placed in microwave drying equipment dry 5min, obtaining coating layer thickness is 0.18mm.
Reflect that refractoriness, the present embodiment refractoriness are 1520 DEG C by the criterion of acceptability part casting after cast molding.According to professional standard
Appearance of coat, wearability and high temperature are sudden and violent after " JB/T 9226-2008 sand casting coating " measurement applying coating, drying, cooling
Fire check grade, test block surface is fine and smooth, without drop impression and removing, and coating wear-resisting value is 0.4g (64r), belongs to I grade standard.Test result
As shown in table 2.
Embodiment 4
Discarded haydite base resin sand mixing is carried out first: taking five batches of Batch Process to discard haydite resin sand respectively each
70Kg is successively loaded into the tapered batch mixer that processing capacity is 500Kg, closed-type feed mouth.Slewing rate 200rpm is set, it is right
Power 0.5KW is answered, the processing time is 30min, and mixed mode is to carry out the continuous mixing of positive and negative alternate, 30min every 10min
After terminate the technique；Then to mixture roasting: the 350Kg black being blended in upper step being discarded sand and is loaded into box atmosphere roaster
Interior, closed fire door, being adjusted to vacuum degree is -0.05MPa.Vacuum baking program is opened, cavity temperature is made to rise to 600 in 30min
DEG C, constant temperature 30min.To be cooled to room temperature naturally, closes negative pressure and put in order roasting sand；After being cooled to room temperature in furnace, close negative
Pressure takes out roasting sand.It is loaded into three-level ultrasonic activation sieve followed by sand will be roasted from feed inlet, wherein three-level sieves the mesh used
Number is 140 mesh, 200 mesh and 325 mesh, and corresponding ultrasonic power is 60W, 350W and 1500W.Be vibrated to sieve residue it is constant when terminate
Screening.140 mesh feedings, 140 ~ 200 mesh middle materials are sorted out, the regeneration for being back to moulding sand for casting uses；By 200 ~ 325 mesh
Intermediate sand material and granularity are collected separately less than 325 mesh sand material for postorder processing.Sand material after primary screening is crushed
And regrading, specially according to the ratio inventory for accounting for horizontal ball grinder quality carrying capacity 50%, by level-one sieve in 200 ~ 325
Sand material and the following sand material of 325 meshes press the mass ratio of 1.0:1.5 among mesh, weigh 34Kg and 51Kg respectively and are packed into high speed horizontal
In formula ball grinder.Ball material mass ratio 5:1 is controlled, selects the zirconium oxide medicine ball of diameter 28mm, 14mm and 5mm to make mill respectively and is situated between.
According to mass ratio 1:1:1, i.e. additive amount is respectively 141.7Kg, 141.7Kg and 141.7Kg, ball gross weight 425.0Kg.Precise
Afterwards, it is added sequentially in ball grinder.Meanwhile closed tank body being placed in shaft.Frequency conversion knob is opened, adjusting revolving speed is
600rpm, corresponding power are 1.5KW, and the processing time is 12.0h, and crushing mode is unidirectional continuous operation, terminate the work after 12.0h
Skill.Crushed material is transferred to 800 mesh, is corresponded in the ultrasonic activation sieve of power 1200W, until sieve residue is no longer reduced, sieve
Lower sand material is except the ceramsite sand reclaimed materials after impurity.
Embodiment 4 is corresponding in constituent content such as table 1 of the present embodiment through above-mentioned removal of impurities treated ceramsite sand reclaimed materials
It is described in row, in the range of standard ceramsite sand, both meets the quality requirement of recycling sand, also comply with fire resisting in cast paint
The component requirements of aggregate.
It is that 600 mesh diatomite aggregate below is according to mass ratio by ceramsite sand reclaimed materials and the granularity after above-mentioned removal of impurities
The group component of 50:50 weighs ceramsite sand reclaimed materials 25Kg and diatomite aggregate 25Kg respectively, is used as compound bone after mixing
Material.Subsequently compound refractory aggregate in mass ratio: suspending agent: binder: defoaming agent: binder: preservative 30%:
The ratio of 25%:15%:10%:5%:2.3% weighs compound refractory powder 15.0Kg respectively；Suspending agent sodium bentonite 9.0Kg,
CMC 3.5Kg, granularity are 800 mesh；Binder aluminium dihydrogen phosphate 7.5Kg；Defoaming agent n-amyl alcohol 5.0Kg；Preservative thymol
2.5Kg；Sodium alkyl benzene sulfonate 1.15Kg.It is 15% that the above raw material, which are successively added to, and account for coating total mass fraction, that is, is equipped with
It is mixed in the agitator of 7.5Kg tap water, until liquid material terminates for viscous liquid.Coating stands 5min, and measuring Baume degrees is 55 °
B´；The cylinder test block of dip-coating is placed in microwave drying equipment and handles 5min, obtaining coating layer thickness is 0.20mm.
Reflect that refractoriness, the present embodiment refractoriness are 1495 DEG C by the criterion of acceptability part casting after cast molding.According to
Professional standard " JB/T 9226-2008 sand casting coating " measures appearance of coat, wearability after applying coating, drying, cooling
With high temperature sudden-heat crackle grade, test block coating uniform is 0.3g (64r) without removing and obscission, coating wear-resisting value, belongs to I grade of mark
It is quasi-.Test result is as shown in table 2.
Embodiment 5
Discarded haydite base resin sand mixing is carried out first: taking five batches of Batch Process to discard haydite resin sand respectively each
70Kg is successively loaded into the tapered batch mixer that processing capacity is 500Kg, closed-type feed mouth.Slewing rate 1500rpm is set,
Corresponding power 2.1KW, processing time are 60min, are the continuous mixed mode of positive and negative alternate formula for being spaced 5min by mode adjustment,
Terminate the technique after 60min；Then to mixture roasting: the 350Kg black being blended in upper step being discarded sand and is loaded into box atmosphere
In roaster, closed fire door, being adjusted to vacuum degree is -0.1MPa, and opening program makes in-furnace temperature rise to 300 DEG C in 90min,
Constant temperature 120min.After being cooled to room temperature in furnace, closes negative pressure and take out roasting sand.Followed by will to roasting sand from feed inlet be loaded into
In three-level ultrasonic activation sieve, the mesh number that wherein three-level sieve uses is 140 mesh, 200 mesh and 325 mesh, and corresponding ultrasonic power is
180W, 600W and 200W.Starting operation, until terminating to sieve when the amount of sieve residue is constant.Sort out 140 mesh feedings, 140 ~ 200
Mesh middle material is back into the regeneration recycling of molding sand；Separately 200 ~ 325 mesh middle materials and 325 mesh blankings are collected separately and
Processing；Sand material after primary screening crush and regrading, specially according to accounting for horizontal ball grinder quality carrying capacity 30%
Ratio inventory, by level-one sieve in sand material under the sieve of sand material and 325 mesh among 200 ~ 325 mesh, according to the quality of 1.0:2.5
Ratio weighs 14.6Kg and 36.4Kg respectively and is loaded into high-speed horizontal ball grinder.Ball material mass ratio 3:1 is controlled, is selected respectively
The zirconium oxide medicine ball of diameter 28mm, 14mm and 5mm make mill and are situated between.According to mass ratio 1:1:3, i.e., additive amount be respectively 30.6Kg,
30.6Kg and 91.8Kg, ball gross weight 153.0Kg.After precise, it is added sequentially in ball grinder.Meanwhile it closed tank mouth and putting
It sets in shaft.Frequency conversion knob is opened, adjusting revolving speed is 200rpm, and corresponding power is 0.5KW, and the processing time is 25.0h, is crushed
Mode is unidirectional continuous operation, terminates the technique after 12.0h.Crushed material is transferred to 800 mesh, the ultrasonic wave of corresponding power 800W
In vibrating screen, screening process is carried out, until sieve residue is no longer reduced, sieving lower sand material is the ceramsite sand reclaimed materials after removal of impurities.
Embodiment 5 is corresponding in constituent content such as table 1 of the present embodiment through above-mentioned removal of impurities treated ceramsite sand reclaimed materials
It is described in row, in the range of standard ceramsite sand, both meets the quality requirement of recycling sand, also comply with fire resisting bone in cast paint
The component requirements of material.By after above-mentioned removal of impurities ceramsite sand reclaimed materials and granularity less than 325 mesh bauxite aggregate according to mass ratio
For the group component of 45:55, ceramsite sand reclaimed materials 30.0Kg and bauxite aggregate 20.0Kg are weighed respectively, after mixing as multiple
Mould assembly aggregate.Then compound refractory aggregate in mass ratio: suspending agent: binder: defoaming agent: binder: preservative ratio
Example is respectively the ratio of 54%:17%:10%:5.1%:2.7%:1.3%, weighs compound refractory powder 27.0Kg respectively；Suspending agent
Attapulgite 8.5Kg, 600 mesh of granularity；Binder calgon 5.00Kg；Defoaming agent n-octyl alcohol 2.55Kg；Preservative pentachloro-
Phenol 1.35Kg；Polyvinyl chloride Zhong Xin phenolic ether -10 is 0.65Kg.The above raw material are successively added to and account for coating total mass fraction
It is 10%, i.e., is mixed in the agitator equipped with 5.0Kg tap water, until liquid material terminates for viscous liquid.Coating stands 5min, surveys
Obtaining Baume degrees is 60 ° of B '；The cylinder test block of dip-coating is placed in microwave drying equipment dry 5min, obtaining coating layer thickness is
0.22mm。
Reflect that refractoriness, the present embodiment refractoriness are 1550 DEG C by the criterion of acceptability part casting after cast molding.According to
Professional standard " JB/T 9226-2008 sand casting coating " measures appearance of coat, wearability after applying coating, drying, cooling
With high temperature sudden-heat crackle grade, for test block surface without drop impression and peeling phenomenon, coating wear-resisting value is 0.4g (64r), belongs to I grade standard.
Test result is as shown in table 2.
Comparative example
This comparative example with the recovery processing of discarded quartzy resin and should in treated it is prepared by reclaimed materials cast paint is into
Row explanation.Antiquated sand is carried out first and mixes the discarded quartzy resin sand 350Kg made type in technique, and being loaded into processing capacity is
In the tapered batch mixer of 500Kg, closed-type feed mouth.Slewing rate 200rpm, corresponding power 0.5KW are set, and the processing time is
30min, mixed mode are to carry out the continuous mixing of positive and negative alternate every 5min, terminate the technique after 30min；.Then to mixing
Material roasting: being loaded into box atmosphere for the discarded quartzy resin sand of the black for the 350Kg being blended in upper step and roast furnace chamber, closed fire door,
Being adjusted to vacuum degree is -0.01MPa.Opening program is warming up to 600 DEG C, constant temperature 75min in 30min.To be cooled to room temperature in furnace
Afterwards, it closes negative pressure and takes out roasting sand.Followed by will be loaded into three-level ultrasonic activation sieve to roasting sand from feed inlet, wherein three-level
Sieving the mesh number used is 140 mesh, 200 mesh and 325 mesh, and corresponding ultrasonic power is 60W, 350W and 850W.It is vibrated to and no longer produces
Terminate to sieve when raw sieve residue.140 mesh feedings, 140 ~ 200 mesh middle materials are sorted out, the regeneration for being back to moulding sand for casting makes
With；Postorder processing is collected separately by sand material among 200 ~ 325 mesh and less than 325 mesh sand material.By the sand material after primary screening into
Row crushes and regrading sieves step level-one specially according to the ratio inventory for accounting for horizontal ball grinder quality carrying capacity 50%
In sand material and the following sand material of 325 meshes among 200 ~ 325 mesh, according to the mass ratio of 1.0:0.5, weigh respectively 56.7Kg and
28.3Kg is loaded into high-speed horizontal ball grinder.Control ball material mass ratio 3:1, i.e. ball weight 255.0Kg.Reselection diameter 28mm,
The zirconium oxide medicine ball of 14mm and 5mm makees mill and is situated between, and according to mass ratio 1:1:3, i.e. additive amount is respectively 51Kg, 51Kg and 153Kg.
After precise, it is added sequentially in ball grinder.Meanwhile it closed tank mouth and being placed in shaft.Frequency conversion knob is opened, setting turns
Dynamic rate is 600rpm, and corresponding power is 1.5KW, and the processing time is 12.0h, and crushing mode is unidirectional continuous operation, after 12.0h
Terminate the technique, crushed material is transferred to 800 mesh, screening process in the ultrasonic activation sieve of corresponding power 1200W, until sieve residue
Until no longer reducing, sieving lower sand material is except the quartz sand reclaimed materials after matter.
Comparative example 1 is corresponding in constituent content such as table 1 of this comparative example through above-mentioned removal of impurities treated quartz sand reclaimed materials
In row.By after above-mentioned removal of impurities quartz sand reclaimed materials and kaolin according to mass ratio be 45:55 group component, weigh regeneration respectively
Quartz sand 22.5Kg and granularity are used as compound aggregate component less than the kaolin aggregate 27.5Kg of 800 mesh after mixing.So
Compound refractory aggregate in mass ratio afterwards: suspending agent: binder: defoaming agent: binder: preservative 54%:17%:10%:
The ratio of 5.1%:2.7%:1.3% weighs compound refractory powder 27.0Kg respectively；Suspending agent sodium bentonite 6.0Kg,
CMC2.5Kg, 800 mesh of granularity；Binder polyvinyl alcohol 5.00Kg, 800 mesh of granularity；Defoaming agent n-butanol 2.55Kg；Preservative hundred
In phenol 1.35Kg；Sodium alkyl benzene sulfonate 0.65Kg.It is 10% that the above raw material, which are successively added to, and account for coating total mass fraction, i.e.,
It is mixed in the agitator of 5.0Kg tap water, until liquid material terminates for viscous liquid.Coating stands 5min, and measuring Baume degrees is 65 °
B´；The cylinder test block of dip-coating is placed in microwave drying equipment and handles 5min, obtaining coating layer thickness is 0.20mm.
Reflect that refractoriness, this comparative example refractoriness are 1480 DEG C by the criterion of acceptability part casting after cast molding.According to
Professional standard " JB/T 9226-2008 sand casting coating " measures appearance of coat, wearability after applying coating, drying, cooling
With high temperature sudden-heat crackle grade, for test block surface without removing, coating wear-resisting value is 0.3g (64r), belongs to I grade standard.Test result is such as
Shown in table 2.
According to Tables 1 and 2 by the comparison of the technical solution of embodiment 1 ~ 5 and comparative example, the present invention uses discarded haydite tree
The method that rouge sand prepares cast paint has the following beneficial effects:
(1) it is handled by high temperature and mechanical technology, can effectively control the various impurity in desanding material, guarantee recycling sand material
The characteristics such as component, granule-morphology, size distribution and surface-active, thoroughly solve that discarded haydite base resin sand recycling is difficult to ask
Topic；
(2) the ceramsite sand constituent obtained through regeneration is more uniform, and microstructure is stablized.It tests and tests by coating
Card: product has the characteristics that refractoriness height, strong ability to resist penetration, strength of coating are high, and the requirement recycled may be implemented；
(3) cast paint of discarded haydite base resin sand preparation of the invention, overcomes that quartzy sand coating is intrinsic easily to be opened
It splits, peel off, the problems such as thermal coefficient is low and easily causes scab and excessive permeation, there is certain substitution effect；
Solve the problems, such as that discarded haydite base resin sand yield is big, processing energy consumption is high and inefficiency, to promotion casting row
The energy-saving and emission-reduction and green manufacturing of industry have demonstration effect.
Claims (9)
1. a kind of method for preparing cast paint with discarded haydite resin sand, includes the following steps:
A) will organic matter that casting is gone in desanding material with discarded haydite resin sand by roasting, primary screening, crush and secondary
Screening process recycles sand material less than the ceramsite sand of 800 mesh at partial size, and the mass component content of the recycling sand material is SiO2 45.0~
55.0 %、Al2O3 35.0~45.0 %、Fe2O3 1.8~3.5 %、CaO+MgO 0.1~1.0 %、K2O+Na20.1 ~ 1.0 % of O,
Total amount is 100%, wherein the mixture of CaO and the MgO above-mentioned dosage mixed for arbitrary proportion, K2O and Na2O is mixed for arbitrary proportion
The mixture for the above-mentioned dosage closed；In roasting process in this step, the haydite resin sand that different batches are discarded passes through mechanical mixed
The method of conjunction, which is uniformly mixed, to be placed on vacuum and bakes in furnace, under -0.01 MPa vacuum condition below, be warming up to 600 DEG C ~
900 DEG C and 30 ~ 120min of heat preservation, the taking-up of blow-on again is then cooled to room temperature in furnace；In screening process, after roasting
Pellet using standard screen mesh number be 140 mesh, 200 mesh and 325 mesh three-level ultrasonic linear vibrating screen gradation sizings, partial size is big
The regeneration for continuing on for foundry sand after the sand material classification separation of 200 mesh uses, and partial size is carried out postorder less than 200 mesh sand material
Crushing and regrading；The crushing process；200 mesh sand material below is subjected to powder processing by ball grinder, then by powder
It minces and obtains recycling sand material less than the ceramsite sand of 800 mesh by the vibrating screen progress regrading of 800 mesh；
B) recycling sand material obtained in upper step is uniformly mixed with partial size less than the composite aggregate of 500 mesh, refractory aggregate is made,
Middle recycling sand material accounts for the 25 ~ 65% of mixture total amount；The composite aggregate is kaolin, bauxite, mullite, graphite powder, diatom
One or more of soil arbitrarily compares mixture；
C) prepare cast paint by following mass percent: refractory aggregate 30 ~ 78% obtained in upper step, suspending agent 9 ~ 25% glue
Tie agent 5 ~ 15%, defoaming agent 0.2 ~ 10%, dispersing agent 5 ~ 15%, preservative 0.5 ~ 5%, surfactant 0.3 ~ 2.3%, above-mentioned component
It is mixed and stirred for uniformly being configured to viscous liquid coating.
2. the method according to claim 1 for preparing cast paint with discarded haydite resin sand, which is characterized in that described
In crushing process, abrading-ball in ball grinder: material mass ratio is (3 ~ 7): 1, the sphere diameter size that abrading-ball is added is respectively 28mm, 14mm
And 5mm, the weight ratio of each sphere diameter abrading-ball are (1 ~ 5): (1 ~ 3): (1 ~ 3).
3. the method according to claim 1 for preparing cast paint with discarded haydite resin sand, which is characterized in that described
In crushing process, 200 ~ 325 mesh recycle the quality usage ratio of sand material and partial size less than the recycling sand material of 325 mesh are as follows: 1:(0.5
~ 2.5).
4. described in any item methods for preparing cast paint with discarded haydite resin sand according to claim 1-3, feature
It is, the granularity of the suspending agent is one of sodium bentonite, attapulgite, Rectorite of 200 ~ 800 mesh or two
The mixture of kind any of the above ratio.
5. described in any item methods for preparing cast paint with discarded haydite resin sand according to claim 1-3, feature
It is, the granularity of the binder is one of the waterglass of 200 ~ 800 mesh, silica solution, aluminium dihydrogen phosphate, calgon
Or two or more mixture.
6. described in any item methods for preparing cast paint with discarded haydite resin sand according to claim 1-3, feature
It is, the defoaming agent is the mixture of any ratio of one or more of n-butanol, n-amyl alcohol and n-octyl alcohol.
7. described in any item methods for preparing cast paint with discarded haydite resin sand according to claim 1-3, feature
It is, the preservative is any ratio of one or more of thymol, pentachlorophenol, penta sodium pentachlorophenate, industrial formol
Mixture.
8. described in any item methods for preparing cast paint with discarded haydite resin sand according to claim 1-3, feature
It is, the surfactant is sodium alkyl benzene sulfonate, in polyvinyl chloride Zhong Xin phenolic ether -10, secondary octyl phenyl Ethoxylate
Any ratios of one or more mixture.
9. described in any item methods for preparing cast paint with discarded haydite resin sand according to claim 1-3, feature
It is, the dispersing agent is water.
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| CN108342103B (en) * | 2018-03-29 | 2020-06-26 | 福建漳平众知防火科技有限公司 | Concrete and brick wall fireproof coating, fireproof mud and preparation method thereof |
| CN108911766A (en) * | 2018-07-28 | 2018-11-30 | 宁夏共享化工有限公司 | A kind of cast paint refractory aggregate intermediate |
| CN108941448B (en) * | 2018-08-14 | 2020-06-02 | 南阳仁创砂业科技有限公司 | Method for regenerating used ceramsite sand, regenerated ceramsite sand and product thereof |
| CN109439283A (en) * | 2018-11-02 | 2019-03-08 | 长沙县新光特种陶瓷有限公司 | A kind of polishing preparation method of alumina powder |
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| JPS6431549A (en) * | 1987-07-27 | 1989-02-01 | Morita Mfg | Molding material for precision casting |
| JPH04178235A (en) * | 1990-11-09 | 1992-06-25 | Sanyo Chem Ind Ltd | Resin composition for wear resistant pattern for sand mold casting |
| CN101259518B (en) * | 2008-04-25 | 2012-09-05 | 昆明理工大学 | Foundry coating prepared from foundry resin sand regeneration power dust, preparation method and use thereof |
| CN102423792A (en) * | 2011-11-28 | 2012-04-25 | 芜湖火龙铸造有限公司 | Casting coating prepared from casting resin sand regeneration dust |
| CN102773406B (en) * | 2012-07-26 | 2015-05-27 | 汉川市石金科技有限公司 | Refractory aggregate of casting coating recycled from old shell powder through investment casting |
| CN104741515A (en) * | 2013-12-25 | 2015-07-01 | 青岛玉光精铸厂 | Casting coating prepared from casting resin sand regeneration dust |
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