CN103586416A - Fluoride-free exothermic insulating riser and preparation method thereof - Google Patents
Fluoride-free exothermic insulating riser and preparation method thereof Download PDFInfo
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- CN103586416A CN103586416A CN201310625252.9A CN201310625252A CN103586416A CN 103586416 A CN103586416 A CN 103586416A CN 201310625252 A CN201310625252 A CN 201310625252A CN 103586416 A CN103586416 A CN 103586416A
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Abstract
The invention provides a fluoride-free exothermic insulating riser and a preparation method thereof and relates to an insulating riser and a preparation method thereof. The objective of the invention is to overcome the technical problems of insufficient heating, a poor insulating effect, occurrence of shrinkage cavities, the casting defect of shrinkage porosity, easy contamination of reused sand, long molding and production periods and high cost of conventional risers. The fluoride-free exothermic insulating riser is prepared from expanded perlite, quartz sand, aluminum powder, magnesium powder, iron oxide powder, potassium nitrate, sodium chloride, an alkaline phenolic resin, organic ester and a coupling agent. The preparation method comprises the following steps: 1, weighing raw materials; 2, preparing a mixed blank material; and 3, preparing the fluoride-free exothermic insulating riser. The riser provided by the invention is applied to preparation of nodular cast iron.
Description
Technical field
The present invention relates to a kind of insulated feeder and preparation method thereof.
Background technology
Spheroidal graphite cast-iron is to obtain globular graphite by nodularization and inoculation, has effectively improved the mechanical performance of cast iron, has particularly improved plasticity and toughness, thereby obtains than carbon steel high intensity also.Liquid contraction and solidification shrinkage are two processes that must experience in spheroidal graphite cast-iron cooling procedure, in these two processes, if can not get timely compensation, often cause the casting flaws such as shrinkage cavity and porosity, cause foundry goods to be scrapped.And rising head is one of effective means solving this class casting flaw, and be widely used.But along with improving constantly that casting quality is required, existing exothermic riser, insulated feeder or heat preservation rising head are due to shortcomings such as heating are not enough, heat insulation effect is poor, be difficult to meet the requirement of high feeding and high deslagging ability, also there will be the casting flaws such as shrinkage cavity and porosity, foundry goods yield rate also decreases.In addition, in the rising head that traditional handicraft is made, in order effectively to strengthen the combustion activity of exothermic material, improve exothermic reaction speed, all added fluoride, yet the gathering of fluorine element can be polluted return sand, in serious situation, make to form in spheroidal graphite cast-iron flake defect; In addition, existing most heat preservation rising heads are that the production cycle is long at additional supplementary energy (heat, blow or blow mist etc.) condition compacted under, and cost is high.
Summary of the invention
The present invention will solve that existing riser heating is not enough, heat insulation effect is poor, have shrinkage cavity and porosity casting flaw, easily pollute return sand, and moulding, the production cycle is long and cost is high technical problem, thereby provide a kind of floride-free heat preservation rising head and preparation method thereof.
A kind of floride-free heat preservation rising head of the present invention by weight mark is to be made by the expanded perlite of 20～28 parts, the quartz sand of 10～25 parts, the aluminium powder of 18～25 parts, the magnesium powder of 4～6 parts, the brown iron oxide of 18～25 parts, the potassium nitrate of 2～4 parts, the sodium chloride of 3～5 parts, the alkalescent phenol resin of 2～3 parts, the organic ester of 0.6～1.0 part and the coupling agent of 0.02～0.03 part.
The preparation method of a kind of floride-free heat preservation rising head of the present invention carries out according to the following steps:
One, mark takes the expanded perlite of 20～28 parts, the quartz sand of 10～25 parts, the aluminium powder of 18～25 parts, the magnesium powder of 4～6 parts, the brown iron oxide of 18～25 parts, the potassium nitrate of 2～4 parts, the sodium chloride of 3～5 parts, the alkalescent phenol resin of 2～3 parts, the organic ester of 0.6～1.0 part and the coupling agent of 0.02～0.03 part by weight;
Two, after evenly mixing, expanded perlite step 1 being taken, quartz sand, brown iron oxide, potassium nitrate, sodium chloride and organic ester in spheroidal bowl mixer, mix 1min～2min processed, and then the aluminium powder and the magnesium powder that add step 1 to take, continuation is mixed 0.5min～1min processed in spheroidal bowl mixer, the alkalescent phenol resin and the coupling agent that finally add step 1 to take, mixed 2min～3min processed in spheroidal bowl mixer, obtains the mixed blank making;
Three, the mixed blank the making consolidation moulding in rising head mould step 2 being obtained gets final product the demoulding after 5min～10min, at room temperature after standing 20h～24h, obtains floride-free heat preservation rising head.
Action principle of the present invention is: expanded perlite is insulation material, quartz sand is filled between the particle of expanded perlite, play the effect of packing material and fire-resistant skeleton, therefore floride-free heat preservation rising head of the present invention had both had good elevated temperature strength, had again good heat insulation effect; Aluminium powder in material, brown iron oxide and potassium nitrate are exothermic mixture, and magnesium powder is combustion adjuvant, and sodium chloride replaces traditional villiaumite to play the effect of conditioning agent, make it have speed of ignition soon and the slow advantage of burning velocity, and heating effect is good; There is cross-linking reaction in alkalescent phenol resin, by materials from bonding together, coupling agent silane plays the effect of bonding strengthening under the effect of curing agent organic ester, thereby make the rising head of preparation have very high tensile strength.
Tool of the present invention has the following advantages:
One, in the rising head that prepared by the present invention, with sodium chloride, replace villiaumite, avoided producing flake and the easy defect of polluting return sand because gathering of fluorine makes spheroidal graphite cast-iron;
Two, after the rising head demoulding that prepared by the present invention, 24h tensile strength is higher than 1.2MPa, and the tensile strength after 15 days, still higher than 1.1MPa, meets production requirement completely;
Three, the rising head that prepared by the present invention has good heat and insulation effect, and its inner metal liquid setting time is the more than 2 times of traditional heat preservation rising head, and feeding rate, higher than 15%, has greatly reduced foundry goods shrinkage cavity and porosity;
Four, preparation method's moulding of rising head of the present invention, with short production cycle, cost is lower, is applicable to large-scale production.
The specific embodiment
The specific embodiment one: in present embodiment a kind of floride-free heat preservation rising head by weight mark be to be made by the expanded perlite of 20～28 parts, the quartz sand of 10～25 parts, the aluminium powder of 18～25 parts, the magnesium powder of 4～6 parts, the brown iron oxide of 18～25 parts, the potassium nitrate of 2～4 parts, the sodium chloride of 3～5 parts, the alkalescent phenol resin of 2～3 parts, the organic ester of 0.6～1.0 part and the coupling agent of 0.02～0.03 part.
Present embodiment tool has the following advantages:
One, in the rising head that prepared by present embodiment, with sodium chloride, replace villiaumite, avoided producing flake and the easy defect of polluting return sand because gathering of fluorine makes spheroidal graphite cast-iron;
Two, after the rising head demoulding that prepared by present embodiment, 24h tensile strength is higher than 1.2MPa, and the tensile strength after 15 days, still higher than 1.1MPa, meets production requirement completely;
Three, the rising head that prepared by present embodiment has good heat preservation effect, and its inner metal liquid setting time is the more than 2 times of traditional heat preservation rising head, and feeding rate, higher than 15%, has greatly reduced foundry goods shrinkage cavity and porosity;
The specific embodiment two: present embodiment is different from the specific embodiment one: floride-free heat preservation rising head by weight mark is to be made by the expanded perlite of 22～26 parts, the quartz sand of 15～20 parts, the aluminium powder of 20～22 parts, the magnesium powder of 4～6 parts, the brown iron oxide of 20～22 parts, the potassium nitrate of 2～3 parts, the sodium chloride of 3～4 parts, the alkalescent phenol resin of 2～3 parts, the organic ester of 0.6～0.8 part and the coupling agent of 0.02～0.03 part.Other is identical with the specific embodiment one.
The specific embodiment three: present embodiment is different from one of the specific embodiment one or two: the granularity of expanded perlite is 50 order～70 orders; Quartz sand is that granularity is that 70 order～140 objects are cleaned sand, and granularity is that the clay content that 70 order～140 objects are cleaned sand is less than 0.5%; The purity of aluminium powder is greater than 98%, and granularity is 100 order～200 orders; The purity of brown iron oxide is greater than 95%, and granularity is 100 order～200 orders; The pH value of alkalescent phenol resin is 12～14, and the mass fraction of free aldehyde is less than 0.2%, and the mass fraction of free phenol is less than 0.5%; Organic ester is glycerol acetate, and the purity of glycerol acetate is greater than 98%; Coupling agent is silane resin acceptor kh-550.Other is identical with one of the specific embodiment one or two.
The specific embodiment four: in present embodiment, a kind of preparation method of floride-free heat preservation rising head carries out according to the following steps:
One, mark takes the expanded perlite of 20～28 parts, the quartz sand of 10～25 parts, the aluminium powder of 18～25 parts, the magnesium powder of 4～6 parts, the brown iron oxide of 18～25 parts, the potassium nitrate of 2～4 parts, the sodium chloride of 3～5 parts, the alkalescent phenol resin of 2～3 parts, the organic ester of 0.6～1.0 part and the coupling agent of 0.02～0.03 part by weight;
Two, after evenly mixing, expanded perlite step 1 being taken, quartz sand, brown iron oxide, potassium nitrate, sodium chloride and organic ester in spheroidal bowl mixer, mix 1min～2min processed, and then the aluminium powder and the magnesium powder that add step 1 to take, continuation is mixed 0.5min～1min processed in spheroidal bowl mixer, the alkalescent phenol resin and the coupling agent that finally add step 1 to take, mixed 2min～3min processed in spheroidal bowl mixer, obtains the mixed blank making;
Three, the mixed blank the making consolidation moulding in rising head mould step 2 being obtained gets final product the demoulding after 5min～10min, at room temperature after standing 20h～24h, obtains floride-free heat preservation rising head.
Present embodiment tool has the following advantages:
Preparation method's moulding of the rising head of present embodiment, with short production cycle, cost is lower, is applicable to large-scale production.
The specific embodiment five: present embodiment is different from the specific embodiment four: in step 1, mark is by the expanded perlite of 22～26 parts, the quartz sand of 15～20 parts, the aluminium powder of 20～22 parts, the magnesium powder of 4～6 parts, the brown iron oxide of 20～22 parts, the potassium nitrate of 2～3 parts, the sodium chloride of 3～4 parts, the alkalescent phenol resin of 2～3 parts, the organic ester of 0.6～0.8 part and the coupling agent of 0.02～0.03 part by weight.Other is identical with the specific embodiment four.
The specific embodiment six: present embodiment is different from one of the specific embodiment four or five: the granularity of the expanded perlite described in step 1 is 50 order～70 orders; Quartz sand described in step 1 is that granularity is that 70 order～140 objects are cleaned sand, and granularity is that the clay content that 70 order～140 objects are cleaned sand is less than 0.5%; The purity of the aluminium powder described in step 1 is greater than 98%, and granularity is 100 order～200 orders; The purity of the brown iron oxide described in step 1 is greater than 95%, and granularity is 100 order～200 orders; The pH value of the alkalescent phenol resin described in step 1 is 12～14, and the mass fraction of free aldehyde is less than 0.2%, and the mass fraction of free phenol is less than 0.5%; Organic ester described in step 1 is glycerol acetate, and the purity of glycerol acetate is greater than 98%; Coupling agent described in step 1 is silane resin acceptor kh-550.Other is identical with one of the specific embodiment four or five.
The specific embodiment seven: present embodiment is different from one of specific embodiment four to six: the mixed blank the making consolidation moulding in rising head mould in step 3, step 2 being obtained, after 7min～9min, get final product the demoulding, at room temperature after standing 21h～23h, obtain floride-free heat preservation rising head.Other is identical with one of specific embodiment four to six.
Adopt following verification experimental verification effect of the present invention:
Test one: the preparation method of a kind of floride-free heat preservation rising head of this test carries out according to the following steps:
One, mark takes the expanded perlite of 21 parts, the quartz sand of 10 parts, the aluminium powder of 25 parts, the magnesium powder of 6 parts, the brown iron oxide of 25 parts, the potassium nitrate of 4 parts, the sodium chloride of 5 parts, the alkalescent phenol resin of 3 parts, the organic ester of 1 part and the coupling agent of 0.03 part by weight; The granularity of the expanded perlite described in step 1 is 60 orders; Quartz sand described in step 1 is that granularity is that 100 objects are cleaned sand, and granularity is that the clay content that 100 objects are cleaned sand is less than 0.3%; The purity of the aluminium powder described in step 1 is 99%, and granularity is 150 orders; The purity of the brown iron oxide described in step 1 is 98%, and granularity is 150 orders; The pH value of the alkalescent phenol resin described in step 1 is 13, and free aldehyde mass fraction is 0.1%, and free phenol mass fraction is 0.4%; Organic ester is glycerol acetate, and purity is 99%; Coupling agent described in step 1 is silane resin acceptor kh-550;
Two, after evenly mixing, expanded perlite step 1 being taken, quartz sand, brown iron oxide, potassium nitrate, sodium chloride and organic ester in spheroidal bowl mixer, mix 2min processed, and then the aluminium powder and the magnesium powder that add step 1 to take, continuation is mixed 1min processed in spheroidal bowl mixer, the alkalescent phenol resin and the coupling agent that finally add step 1 to take, mixed 2min processed in spheroidal bowl mixer, obtains the mixed blank making;
Three, the mixed blank the making consolidation moulding in rising head mould step 2 being obtained gets final product the demoulding after 5min, at room temperature after standing 24h, obtains floride-free heat preservation rising head.
In this test, prepare the floride-free heat preservation rising head of gained, after testing, after 24h, compression strength is 1.31MPa, and the tensile strength after 15 days, still higher than 1.18MPa, meets production requirement completely; Rising head inner metal liquid setting time is 2.3 times of traditional heat preservation rising head, and feeding rate reaches 16.1%, and the floride-free heat preservation rising head of this test preparation has good heat preservation effect, has greatly reduced foundry goods shrinkage cavity and porosity.
Test two: the preparation method of a kind of floride-free heat preservation rising head of this test carries out according to the following steps:
One, mark takes the expanded perlite of 27 parts, the quartz sand of 25 parts, the aluminium powder of 18 parts, the magnesium powder of 4 parts, the brown iron oxide of 18 parts, the potassium nitrate of 2 parts, the sodium chloride of 3.5 parts, the alkalescent phenol resin of 2 parts, the organic ester of 0.5 part and the coupling agent of 0.02 part by weight; The granularity of the expanded perlite described in step 1 is 60 orders; Quartz sand described in step 1 is for cleaning sand, and clay content is 0.3%, and granularity is 100 orders; The purity of the aluminium powder described in step 1 is 99%, and granularity is 150 orders; The purity of the brown iron oxide described in step 1 is 98%, and granularity is 150 orders; The pH value of the alkalescent phenol resin described in step 1 is 13, and free aldehyde mass fraction is 0.1%, and free phenol mass fraction is 0.4%; Organic ester is glycerol acetate, and purity is 99%; Coupling agent described in step 1 is silane resin acceptor kh-550;
Two, after evenly mixing, expanded perlite step 1 being taken, quartz sand, brown iron oxide, potassium nitrate, sodium chloride and organic ester in spheroidal bowl mixer, mix 1.5min processed, and then the aluminium powder and the magnesium powder that add step 1 to take, continuation is mixed 1min processed in spheroidal bowl mixer, the alkalescent phenol resin and the coupling agent that finally add step 1 to take, mixed 3min processed in spheroidal bowl mixer, obtains the mixed blank making;
Three, the mixed blank the making consolidation moulding in rising head mould step 2 being obtained gets final product the demoulding after 10min, at room temperature after standing 24h, obtains floride-free heat preservation rising head.
In this test, prepare the floride-free heat preservation rising head of gained, after testing, after 24h, compression strength is 1.24MPa, and the tensile strength after 15 days, still higher than 1.15MPa, meets production requirement completely; Rising head inner metal liquid setting time is 2.1 times of traditional heat preservation rising head, and feeding rate reaches 15.5%, and the floride-free heat preservation rising head of this test preparation has good heat preservation effect, has greatly reduced foundry goods shrinkage cavity and porosity.
Claims (7)
1. a floride-free heat preservation rising head, it is characterized in that floride-free heat preservation rising head by weight mark be to be made by the expanded perlite of 20～28 parts, the quartz sand of 10～25 parts, the aluminium powder of 18～25 parts, the magnesium powder of 4～6 parts, the brown iron oxide of 18～25 parts, the potassium nitrate of 2～4 parts, the sodium chloride of 3～5 parts, the alkalescent phenol resin of 2～3 parts, the organic ester of 0.6～1.0 part and the coupling agent of 0.02～0.03 part.
2. a kind of floride-free heat preservation rising head according to claim 1, it is characterized in that floride-free heat preservation rising head by weight mark be to be made by the expanded perlite of 22～26 parts, the quartz sand of 15～20 parts, the aluminium powder of 20～22 parts, the magnesium powder of 4～6 parts, the brown iron oxide of 20～22 parts, the potassium nitrate of 2～3 parts, the sodium chloride of 3～4 parts, the alkalescent phenol resin of 2～3 parts, the organic ester of 0.6～0.8 part and the coupling agent of 0.02～0.03 part.
3. a kind of floride-free heat preservation rising head according to claim 1, the granularity that it is characterized in that expanded perlite is 50 order～70 orders; Quartz sand is that granularity is that 70 order～140 objects are cleaned sand, and granularity is that the clay content that 70 order～140 objects are cleaned sand is less than 0.5%; The purity of aluminium powder is greater than 98%, and granularity is 100 order～200 orders; The purity of brown iron oxide is greater than 95%, and granularity is 100 order～200 orders; The pH value of alkalescent phenol resin is 12～14, and the mass fraction of free aldehyde is less than 0.2%, and the mass fraction of free phenol is less than 0.5%; Organic ester described in step 1 is glycerol acetate, and the purity of glycerol acetate is greater than 98%; Coupling agent described in step 1 is silane resin acceptor kh-550.
4. prepare the method for a kind of floride-free heat preservation rising head as claimed in claim 1, it is characterized in that the preparation method of floride-free heat preservation rising head carries out according to the following steps:
One, mark takes the expanded perlite of 20～28 parts, the quartz sand of 10～25 parts, the aluminium powder of 18～25 parts, the magnesium powder of 4～6 parts, the brown iron oxide of 18～25 parts, the potassium nitrate of 2～4 parts, the sodium chloride of 3～5 parts, the alkalescent phenol resin of 2～3 parts, the organic ester of 0.6～1.0 part and the coupling agent of 0.02～0.03 part by weight;
Two, after evenly mixing, expanded perlite step 1 being taken, quartz sand, brown iron oxide, potassium nitrate, sodium chloride and organic ester in spheroidal bowl mixer, mix 1min～2min processed, and then the aluminium powder and the magnesium powder that add step 1 to take, continuation is mixed 0.5min～1min processed in spheroidal bowl mixer, the alkalescent phenol resin and the coupling agent that finally add step 1 to take, mixed 2min～3min processed in spheroidal bowl mixer, obtains the mixed blank making;
Three, the mixed blank the making consolidation moulding in rising head mould step 2 being obtained gets final product the demoulding after 5min～10min, at room temperature after standing 20h～24h, obtains floride-free heat preservation rising head.
5. the preparation method of a kind of fluorine heat preservation rising head according to claim 4, is characterized in that in step 1 that mark is by the expanded perlite of 22～26 parts, the quartz sand of 15～20 parts, the aluminium powder of 20～22 parts, the magnesium powder of 4～6 parts, the brown iron oxide of 20～22 parts, the potassium nitrate of 2～3 parts, the sodium chloride of 3～4 parts, the alkalescent phenol resin of 2～3 parts, the organic ester of 0.6～0.8 part and the coupling agent of 0.02～0.03 part by weight.
6. the preparation method of a kind of fluorine heat preservation rising head according to claim 4, the granularity that it is characterized in that the expanded perlite described in step 1 is 50 order～70 orders; Quartz sand described in step 1 is that granularity is that 70 order～140 objects are cleaned sand, and granularity is that the clay content that 70 order～140 objects are cleaned sand is less than 0.5%; The purity of the aluminium powder described in step 1 is greater than 98%, and granularity is 100 order～200 orders; The purity of the brown iron oxide described in step 1 is greater than 95%, and granularity is 100 order～200 orders; The pH value of the alkalescent phenol resin described in step 1 is 12～14, and the mass fraction of free aldehyde is less than 0.2%, and the mass fraction of free phenol is less than 0.5%; Organic ester described in step 1 is glycerol acetate, and the purity of glycerol acetate is greater than 98%; Coupling agent described in step 1 is silane resin acceptor kh-550.
7. the preparation method of a kind of fluorine heat preservation rising head according to claim 4, it is characterized in that the mixed blank making consolidation moulding in rising head mould that step 3 kind obtains step 2, after 7min～9min, get final product the demoulding, at room temperature after standing 21h～23h, obtain floride-free heat preservation rising head.
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| CN104942233A (en) * | 2015-07-22 | 2015-09-30 | 湖北亚钢金属制造有限公司 | Heating and thermal insulating pouring cup and manufacturing method thereof |
| CN106180660A (en) * | 2016-08-15 | 2016-12-07 | 哈尔滨理工大学 | Steel-casting riser heating and insulating agent and preparation method thereof |
| CN106180540A (en) * | 2016-08-15 | 2016-12-07 | 哈尔滨理工大学 | Use organic ester waterglass from hard heat preservation rising head and preparation method thereof |
| CN106278313A (en) * | 2016-08-15 | 2017-01-04 | 哈尔滨理工大学 | A kind of furane resins are from hard heat preservation rising head and preparation method thereof |
| CN110449546A (en) * | 2019-09-20 | 2019-11-15 | 重庆长江造型材料（集团）股份有限公司 | A kind of preparation process of riser precoated sand |
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| CN111451484A (en) * | 2020-04-30 | 2020-07-28 | 安徽昱工耐磨材料科技有限公司 | Amorphous heating patch for casting and preparation method thereof |
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| CN110526618A (en) * | 2019-09-06 | 2019-12-03 | 天津凯星科技有限公司 | A kind of feeding element and manufacturing method and feeding head |
| CN110449546A (en) * | 2019-09-20 | 2019-11-15 | 重庆长江造型材料（集团）股份有限公司 | A kind of preparation process of riser precoated sand |
| CN110479953A (en) * | 2019-09-20 | 2019-11-22 | 重庆长江造型材料（集团）股份有限公司 | A kind of riser precoated sand |
| CN111451484A (en) * | 2020-04-30 | 2020-07-28 | 安徽昱工耐磨材料科技有限公司 | Amorphous heating patch for casting and preparation method thereof |
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