CN107159853B - A kind of preparation method of heat preservation riser - Google Patents
A kind of preparation method of heat preservation riser Download PDFInfo
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- CN107159853B CN107159853B CN201710337176.XA CN201710337176A CN107159853B CN 107159853 B CN107159853 B CN 107159853B CN 201710337176 A CN201710337176 A CN 201710337176A CN 107159853 B CN107159853 B CN 107159853B
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- heat preservation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/06—Ingot moulds or their manufacture
- B22D7/10—Hot tops therefor
- B22D7/108—Devices for making or fixing hot tops
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Abstract
The invention belongs to cast casting technical fields, and in particular to a kind of preparation method of heat preservation riser.After the present invention first crushes calcium silicates etc., with the Hybrid Heatings such as coupling agent, obtain suspension, calcium silicates and glass bead had both had preferable elevated temperature strength and heat insulation effect, cerium oxide is partially soluble in hydrochloric acid again, cerium ion is chelated with di (isooctyl) phosphate, oxygen can be released when cerium oxide fuel-rich state, and cerium ion stores oxygen in lean burn, and then keep good combustion-supporting effect, and cerium oxide can be catalyzed when combustion-supporting and reduce the ignition temperature of magnesium powder, it will be mixed after the ball millings such as iron oxide with aluminium powder etc. again, iron oxide, copper oxide and aluminium powder can generate higher heat and higher speed of igniting, and aluminium oxide can make burning velocity slack-off again, persistently generate higher fever, compression moulding after being mixed again with phenolic resin etc., heat preservation riser is made in hot setting.Heat preservation riser heating foot of the present invention, feeding rate are higher than 15%, and heat insulation effect is good.
Description
Technical field
The invention belongs to cast casting technical fields, and in particular to a kind of preparation method of heat preservation riser.
Background technique
Spheroidal graphite cast-iron is to obtain globular graphite by nodularization and inoculation, effectively improves the mechanical performance of cast iron,
Plasticity and toughness are in particular improved, to obtain the intensity also higher than carbon steel.Liquid contraction and solidification shrinkage are spheroidal graphite cast-iron
Two processes being subjected in cooling procedure, during the two, if cannot compensate in time, often result in shrinkage cavity,
The casting flaws such as shrinkage porosite, cause casting to scrap.And riser is one of the effective means for solving this kind of casting flaw, and is made extensively
With.
Heat preservation riser is made of a variety of materials such as exothermic mixture, heat preserving agent and binders, in casting process, due to
Riser material chemically reacts, and promotes molten metal temperature therein, thus extend setting time of the molten metal in riser,
Reflux returns casting mold, realizes feeding.With the continuous improvement required casting quality, existing exothermic riser, insulated feeder or fever
Insulated feeder is due to the disadvantages of fever is insufficient, heat insulation effect is poor, it is difficult to meet the requirement of high feeding and high deslagging ability, can also go out
The existing casting flaws such as shrinkage cavity and shrinkage porosite, casting yield rate also decrease.In addition, in the riser of traditional handicraft production, in order to
The effectively combustion activity of enhancing exothermic material, improves exothermic reaction speed, all joined fluoride, however, the aggregation of fluorine element
Return sand can be polluted, makes to form flake defect in spheroidal graphite cast-iron；In addition, existing majority heat preservation riser is to add auxiliary energy outside
It is formed under the conditions of source (heating, blow or blow mist etc.), the production cycle is long.
It would therefore be highly desirable to develop the heat preservation riser that a kind of fever is sufficient, heat insulation effect is good, have to fields such as cast castings
Necessary meaning.
Summary of the invention
The technical problems to be solved by the invention: insufficient for existing heat preservation riser heating, heat insulation effect difference
Defect provides a kind of preparation method of heat preservation riser.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
(1) 300~400g calcium silicates, 200~300g kaolin and 50~60g silica sand are weighed to crush, be sieved, is sieved
Object obtains suspension after taking 200~300g sieving, 500~600mL water and the mixing of 30~40g glass bead；
(2) it weighs after 20~30g cerium oxide and 300~400mL mass fraction be 25% 30~40min of hydrochloric acid stirring and dissolving,
Adding 5~8g di (isooctyl) phosphate and 80~100mL mass fraction is 75% ethanol solution, react 70 at 50~100 DEG C~
90min obtains product, and product is filtered, and obtains filtrate and filter residue, by filtrate layered, obtains subnatant, subnatant is concentrated,
Obtain concentrate；
(3) 25~30g iron oxide and 3~5g aluminium oxide are weighed through ball milling, sieving, obtains mixed-powder, takes 25~30g mixed
After closing powder, 10~15g aluminium powder, 3~5g filter residue and the mixing of 10~15mL concentrate, mixture is obtained；
(4) according to parts by weight, 40~50 parts of suspensions, 15~20 parts of mixtures, 3~5 parts of phenolic resin, 8~12g are taken
After magnesium powder and 0.3~0.5 part of dodecyl sodium sulfate mix 30~40min, moves into sand mixer and be blended 3~5min, obtain base
Heat preservation riser can be obtained in the repressed molding of blank, demoulding, drying by material.
3~5g silane resin acceptor kh-550 can also be added when mixing in sieving and glass bead as described in step (1).
The temperature of reaction described in step (2) is 50~60 DEG C.
10~15g copper oxide can also be added when iron oxide described in step (3) and aluminium oxide ball milling.
The temperature of drying described in step (4) is 160~170 DEG C.
The present invention is compared with other methods, and advantageous effects are:
(1) silica sand and calcium silicates are filled in kaolin, glass using kaolin and glass bead as thermal insulation material by the present invention
Change between bead particles, plays the role of packing material and fire resisting skeleton, therefore heat preservation riser prepared by the present invention both had
There is good elevated temperature strength, and there is good thermal insulation property；
(2) cerium oxide is partially dissolved in hydrochloric acid by the present invention, then chelates cerium ion with di (isooctyl) phosphate, and part is not
The cerium oxide of dissolution can release oxygen in fuel-rich state, and cerium ion can then store oxygen in lean burn condition, and then keep good
Good combustion-supporting effect, and cerium oxide can be catalyzed when combustion-supporting and reduce the ignition temperature of magnesium rod, and iron oxide, copper oxide and aluminium powder
Cooperation can then generate higher heat and higher speed of igniting, and simultaneous oxidation aluminium can be such that the speed of burning slows down again, in turn
Heat preservation riser is set to continue to generate higher fever.
Specific embodiment
300~400g calcium silicates, 200~300g kaolin and 50~60g silica sand are weighed first is added to powder in pulverizer
It is broken, 80~100 meshes are crossed, sieving is obtained, 200~300g sieving is taken to be added in the beaker for filling 500~600mL water,
It is added 3~5g silane resin acceptor kh-550 and 30~40g glass bead into beaker again, and beaker immigration digital display is tested the speed constant temperature
It is 70~80 DEG C in temperature in blender, revolving speed is to be stirred 25~30min under 400~450r/min, suspension is obtained,
Simultaneously weigh 20~30g cerium oxide be added to fill 300~400mL mass fraction be 25% hydrochloric acid beaker in, place the beaker
In water-bath, temperature is controlled after 50~60 DEG C, 30~40min of stirring and dissolving, then addition 5~8g di(2-ethylhexyl)phosphate is different pungent into beaker
Ester and 80~100mL mass fraction are 75% ethanol solution, are stirred to react 70~90min, obtain product, product is filtered, respectively
Filtrate and filter residue are obtained, by filtrate stratification, obtains subnatant, and subnatant is placed in Rotary Evaporators, concentrated by rotary evaporation
To 30~40min, concentrate is obtained, then weighs 25~30g iron oxide, 10~15g copper oxide and 3~5g aluminium oxide and is added to ball
100~120 meshes are crossed in grinding machine after ball milling, obtain mixed-powder, take 25~30g mixed-powder, 10~15g aluminium powder, 3~5g filter
Slag and 10~15mL concentrate are added to 10~15min of mixing in beaker, obtain mixture, finally according to parts by weight, respectively
Weigh 40~50 parts of suspensions, 15~20 parts of mixtures, 3~5 parts of phenolic resin, 8~12g magnesium powder and 0.3~0.5 part of dodecane
Base sodium sulfonate is added in beaker, and beaker immigration digital display is tested the speed in thermostatic mixer, in temperature be 110~120 DEG C, revolving speed
After stirring 30~40min under 300~400r/min, the material in beaker is moved into sand mixer and is blended 3~5min, obtains base
Material, is placed in compression moulding in mold for blank, demoulds, the riser after demoulding is put into baking oven, dry at 160~170 DEG C
After 60~90min, simultaneously cooled to room temperature is taken out, heat preservation riser can be obtained.
Example 1
300g calcium silicates, 200g kaolin and 50g silica sand are weighed first to be added in pulverizer and crush, and are crossed 80 meshes, are obtained
To sieving, 200g sieving is taken to be added in the beaker for filling 500mL water, then 3g silane coupling agent KH- is added into beaker
550 and 30g glass bead, and beaker immigration digital display is tested the speed in thermostatic mixer, in temperature be 70 DEG C, revolving speed 400r/min
Under be stirred 25min, obtain suspension, at the same weigh 20g cerium oxide be added to fill 300mL mass fraction be 25% hydrochloric acid
Beaker in, place the beaker in water-bath, control temperature after 50 DEG C, stirring and dissolving 30min, then into beaker be added 5g phosphorus
Sour di-isooctyl and 80mL mass fraction are 75% ethanol solution, are stirred to react 70min, obtain product, product is filtered, respectively
Filtrate and filter residue are obtained, by filtrate stratification, obtains subnatant, and subnatant is placed in Rotary Evaporators, concentrated by rotary evaporation
To 30min, concentrate is obtained, then weighs 25g iron oxide, 10g copper oxide and 3g aluminium oxide and is added in ball mill mistake after ball milling
100 meshes, obtain mixed-powder, and 25g mixed-powder, 10g aluminium powder, 3g filter residue and 10mL concentrate is taken to be added in beaker and mix
10min obtains mixture, finally according to parts by weight, weigh respectively 40 parts of suspensions, 15 parts of mixtures, 3 parts of phenolic resin,
8g magnesium powder and 0.3 part of dodecyl sodium sulfate are added in beaker, and beaker immigration digital display is tested the speed in thermostatic mixer, Yu Wen
Degree is 110 DEG C, and revolving speed is after stirring 30min under 300r/min, the material in beaker to be moved into sand mixer and is blended 3min, is obtained
Blank is placed in compression moulding in mold by blank, and the riser after demoulding is put into baking oven by demoulding, dry at 160 DEG C
After 60min, simultaneously cooled to room temperature is taken out, heat preservation riser can be obtained.
Heat preservation riser prepared by the present invention is put into casting moulds, then riser is fixed on mold, by molten iron
It is poured at 1200 DEG C.Through detecting, the light-off time of heat preservation riser prepared by the present invention shorten to 10s, ignition temperature
Degree is reduced to 650 DEG C, and the heating efficiency of riser entirety is high, and feeding rate is 16%, and the molten metal setting time in riser extends
1.5 times, significantly reduce casting shrinkage cavity and shrinkage porosite.
Example 2
350g calcium silicates, 250g kaolin and 55g silica sand are weighed first to be added in pulverizer and crush, and are crossed 90 meshes, are obtained
To sieving, 250g sieving is taken to be added in the beaker for filling 550mL water, then 4g silane coupling agent KH- is added into beaker
550 and 35g glass bead, and beaker immigration digital display is tested the speed in thermostatic mixer, in temperature be 75 DEG C, revolving speed 430r/min
Under be stirred 28min, obtain suspension, at the same weigh 25g cerium oxide be added to fill 350mL mass fraction be 25% hydrochloric acid
Beaker in, place the beaker in water-bath, control temperature after 55 DEG C, stirring and dissolving 35min, then into beaker be added 7g phosphorus
Sour di-isooctyl and 90mL mass fraction are 75% ethanol solution, are stirred to react 80min, obtain product, product is filtered, respectively
Filtrate and filter residue are obtained, by filtrate stratification, obtains subnatant, and subnatant is placed in Rotary Evaporators, concentrated by rotary evaporation
To 35min, concentrate is obtained, then weighs 28g iron oxide, 13g copper oxide and 4g aluminium oxide and is added in ball mill mistake after ball milling
110 meshes, obtain mixed-powder, and 28g mixed-powder, 13g aluminium powder, 4g filter residue and 13mL concentrate is taken to be added in beaker and mix
13min obtains mixture, finally according to parts by weight, weigh respectively 45 parts of suspensions, 18 parts of mixtures, 4 parts of phenolic resin,
10g magnesium powder and 0.4 part of dodecyl sodium sulfate are added in beaker, and beaker immigration digital display is tested the speed in thermostatic mixer, in
Temperature is 115 DEG C, and revolving speed is after stirring 35min under 350r/min, the material in beaker to be moved into sand mixer and is blended 4min, is obtained
To blank, blank is placed in compression moulding in mold, demoulds, the riser after demoulding is put into baking oven, it is dry at 165 DEG C
After 75min, simultaneously cooled to room temperature is taken out, heat preservation riser can be obtained.
Heat preservation riser prepared by the present invention is put into casting moulds, then riser is fixed on mold, by molten iron
It is poured at 1250 DEG C.Through detecting, the light-off time of heat preservation riser prepared by the present invention shorten to 13s, ignition temperature
Degree is reduced to 675 DEG C, and the heating efficiency of riser entirety is high, and feeding rate is 18%, and the molten metal setting time in riser extends
1.6 times, significantly reduce casting shrinkage cavity and shrinkage porosite.
Example 3
400g calcium silicates, 300g kaolin and 60g silica sand are weighed first to be added in pulverizer and crush, and are sieved with 100 mesh sieve, are obtained
To sieving, 300g sieving is taken to be added in the beaker for filling 600mL water, then 5g silane coupling agent KH- is added into beaker
550 and 40g glass bead, and beaker immigration digital display is tested the speed in thermostatic mixer, in temperature be 80 DEG C, revolving speed 450r/min
Under be stirred 30min, obtain suspension, at the same weigh 30g cerium oxide be added to fill 400mL mass fraction be 25% hydrochloric acid
Beaker in, place the beaker in water-bath, control temperature after 60 DEG C, stirring and dissolving 40min, then into beaker be added 8g phosphorus
Sour di-isooctyl and 100mL mass fraction are 75% ethanol solution, are stirred to react 90min, obtain product, product is filtered, respectively
Filtrate and filter residue are obtained, by filtrate stratification, obtains subnatant, and subnatant is placed in Rotary Evaporators, concentrated by rotary evaporation
To 40min, concentrate is obtained, then weighs 30g iron oxide, 15g copper oxide and 5g aluminium oxide and is added in ball mill mistake after ball milling
120 meshes, obtain mixed-powder, and 30g mixed-powder, 15g aluminium powder, 5g filter residue and 15mL concentrate is taken to be added in beaker and mix
15min obtains mixture, finally according to parts by weight, weigh respectively 50 parts of suspensions, 20 parts of mixtures, 5 parts of phenolic resin,
12g magnesium powder and 0.5 part of dodecyl sodium sulfate are added in beaker, and beaker immigration digital display is tested the speed in thermostatic mixer, in
Temperature is 120 DEG C, and revolving speed is after stirring 40min under 400r/min, the material in beaker to be moved into sand mixer and is blended 5min, is obtained
To blank, blank is placed in compression moulding in mold, demoulds, the riser after demoulding is put into baking oven, it is dry at 170 DEG C
After 90min, simultaneously cooled to room temperature is taken out, heat preservation riser can be obtained.
Heat preservation riser prepared by the present invention is put into casting moulds, then riser is fixed on mold, by molten iron
It is poured at 1300 DEG C.Through detecting, the light-off time of heat preservation riser prepared by the present invention shorten to 15s, ignition temperature
Degree is reduced to 700 DEG C, and the heating efficiency of riser entirety is high, and feeding rate is 20%, and the molten metal setting time in riser extends
1.8 times, significantly reduce casting shrinkage cavity and shrinkage porosite.
Claims (5)
1. a kind of preparation method of heat preservation riser, it is characterised in that specific preparation step are as follows:
(1) 300~400g calcium silicates, 200~300g kaolin and 50~60g silica sand are weighed to crush, be sieved, obtains sieving,
After taking 200~300g sieving, 500~600mL water and the mixing of 30~40g glass bead, suspension is obtained；
(2) it weighs after 20~30g cerium oxide and 300~400mL mass fraction be 25% 30~40min of hydrochloric acid stirring and dissolving, then plus
Entering 5~8g di (isooctyl) phosphate and 80~100mL mass fraction is 75% ethanol solution, in 50~100 DEG C of 70~90min of reaction,
Product is obtained, product is filtered, obtains filtrate and filter residue, by filtrate layered, subnatant is obtained, subnatant is concentrated, is obtained dense
Contracting liquid；
(3) 25~30g iron oxide and 3~5g aluminium oxide are weighed through ball milling, sieving, mixed-powder is obtained, takes 25~30g mixed powder
After end, 10~15g aluminium powder, 3~5g filter residue and the mixing of 10~15mL concentrate, mixture is obtained；
(4) according to parts by weight, 40~50 parts of suspensions, 15~20 parts of mixtures, 3~5 parts of phenolic resin, 8~12g magnesium powder are taken
After mixing 30~40min with 0.3~0.5 part of dodecyl sodium sulfate, moves into sand mixer and be blended 3~5min, obtain blank, it will
The repressed molding of blank, demoulding, drying, can be obtained heat preservation riser.
2. a kind of preparation method of heat preservation riser according to claim 1, which is characterized in that described in step (1)
Sieving and glass bead mix when be added 3~5g silane resin acceptor kh-550.
3. a kind of preparation method of heat preservation riser according to claim 1, which is characterized in that described in step (2)
Reaction temperature be 50~60 DEG C.
4. a kind of preparation method of heat preservation riser according to claim 1, which is characterized in that described in step (3)
Iron oxide and aluminium oxide ball milling when be added 10~15g copper oxide.
5. a kind of preparation method of heat preservation riser according to claim 1, which is characterized in that described in step (4)
Drying temperature be 160~170 DEG C.
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| CN108044041B (en) * | 2018-01-25 | 2020-11-20 | 大连交通大学 | Resource recycling type heating and heat-preserving riser sleeve, raw pressing block, self-pressure heating and heat-preserving riser sleeve and preparation method thereof |
| CN113828740B (en) * | 2021-08-23 | 2023-04-07 | 武汉纺织大学 | Organic silicon slag heating and heat-insulating riser sleeve and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85204026U (en) * | 1985-09-29 | 1986-06-11 | 北京钢铁学院 | Temperature holding overflow jacket for casting piece |
| CN101433944A (en) * | 2008-12-19 | 2009-05-20 | 洛阳双瑞特种装备有限公司 | High-efficient exothermic riser sleeve for casting |
| CN104368761A (en) * | 2014-11-18 | 2015-02-25 | 贵州安吉航空精密铸造有限责任公司 | Heating and thermal insulation riser sleeve |
| CN106187075A (en) * | 2016-07-11 | 2016-12-07 | 雷春生 | A kind of preparation method of heat preservation vacuum riser buss |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5841940B2 (en) * | 1981-05-20 | 1983-09-16 | 株式会社 高田製鋼所 | Solid heat-generating heat insulating agent for boiler |
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2017
- 2017-05-14 CN CN201710337176.XA patent/CN107159853B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85204026U (en) * | 1985-09-29 | 1986-06-11 | 北京钢铁学院 | Temperature holding overflow jacket for casting piece |
| CN101433944A (en) * | 2008-12-19 | 2009-05-20 | 洛阳双瑞特种装备有限公司 | High-efficient exothermic riser sleeve for casting |
| CN104368761A (en) * | 2014-11-18 | 2015-02-25 | 贵州安吉航空精密铸造有限责任公司 | Heating and thermal insulation riser sleeve |
| CN106187075A (en) * | 2016-07-11 | 2016-12-07 | 雷春生 | A kind of preparation method of heat preservation vacuum riser buss |
| 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 |
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