CN102091758B - Novel die cast cap port sphere composite heating agent and production method thereof - Google Patents
Novel die cast cap port sphere composite heating agent and production method thereof Download PDFInfo
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- CN102091758B CN102091758B CN 201110044024 CN201110044024A CN102091758B CN 102091758 B CN102091758 B CN 102091758B CN 201110044024 CN201110044024 CN 201110044024 CN 201110044024 A CN201110044024 A CN 201110044024A CN 102091758 B CN102091758 B CN 102091758B
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Abstract
The invention discloses a novel die cast cap port sphere composite heating agent and a production method thereof. The novel die cast cap port sphere composite heating agent consists of spheres and sphere coatings, wherein the spheres are prepared by processing aluminum powder, sodium nitrate, ferric oxide powder, fluorite powder and bonding agent serving as raw materials; and the sphere coatings consist of acidized graphite. The production method comprises the following steps of: mixing and stirring the raw materials, pressing the raw materials into spheres, coating the spheres, and recoating the spheres to obtain a qualified product. According to the product obtained by the technical scheme of the invention, the spheres are basically not expanded with heating in the steelmaking casting use process, the raw material density (concentration) of the heating parts of the spheres is not changed, the heating reaction of the spheres is quick, the heating temperature can reach over 1,650 DEG C, secondary feeding effect is fully realized, the head of a casting blank forms good 'dish-shaped' shrinkage, the yield of the casting blank is improved by over 7 percent, and the content of the aluminum powder is greatly reduced so that the production cost is reduced.
Description
Technical field
The invention belongs to metallurgical stone technical field, be specifically related to a kind of novel molded cap ball composite heating agent and production method thereof.
Background technology
At the initial stage eighties, China's metallurgy industry molded cap ingot casting head uses the anti-product that shrinks to be the thermal-insulating type anticrater agent, and this anticrater agent has only insulation effect, does not generate heat basically, and the ingot casting head shrinks serious, and the strand lumber recovery is low.Get into the nineties, metallurgic auxiliary materials producer is according to the thermit reaction principle, with metallic aluminium (Al), sodium nitrate (NaNO
3), iron powder (Fe
2O
3), wood chip, expanded graphite material development and designs such as (acidifying graphite) go out powdery fever type anticrater agent, is called for short exothermic mixture." anticrater agent is used in the steel-making die casting " that the precious profit of " iron and steel " the 23rd volume the 6th phase Dalian Steel Plant's special steel Guo of research institute is delivered, and " wherein a kind of prescription of this anticrater agent is 30～55% aluminium, 0～10% FeO, 3～6% sodium nitrate, 5～10% expanded graphite, 5% fluorite to disclose following technical characterictic."; this powdery exothermic mixture (acidifying graphite and aluminium powder, sodium nitrate, brown iron oxide and fluorite powder powdery amalgam) has reduced 2.5 times because of the density (concentration) that makes aluminium powder, sodium nitrate, brown iron oxide and fluorite powder behind the acidifying graphite expanded by heating; according to the chemical reaction equilibrium principle, thermal response speed has weakened 2.5 times so, and burning is not concentrated; the heating temp difficulty can be brought up to more than 1550 ℃; can not melt " V " type cap mouth iron and steel that has solidified, can not realize the secondary fusion feeding of cap mouth ingot casting fully, not give full play of ideal role; For solving this crux, have only and strengthen in the conventional powdered exothermic mixture proportional quantity of aluminium powder in the main heating raw material, production cost increases greatly.A kind of molded cap ball composite heating agent and production technology thereof are disclosed though application number is 200910065963.9 patent application, this exothermic mixture be raw material by following percentage by weight through being processed into: aluminium powder 15-20%, sodium nitrate 8-13%, brown iron oxide 32-51%, fluorite powder 20-25%, acidifying graphite 6-10%.Its technology is: aluminium powder, sodium nitrate, brown iron oxide, fluorite powder, the acidifying graphite raw material of said weight proportion are mixed; By said proportion speed metering; Every batch of gross weight is 500kg, is transported to respectively in the planet kolleroang to stir 20 minutes, and the mixture that accurately measures then is conveyed into and continues in the planet kolleroang to stir 30 minutes; Stir qualified compound in conveyer belt is transported to the high-pressure spiral machine; Compound is pressed into 60 tons of spherical mould inner high voltage moulding in two huge rock friction presses through the high-pressure spiral machine, and the spheroid of moulding is released mould through forcing press, sends into then in conveyor delivery to the time packing machine and once packs; Once accurately measure the acidifying graphite of allocating the standard-required amount into after the packing again and carry out the secondary check packing, the examination and test of products warehouse-in after the packing.Obviously find out the acidifying graphite of being furnished with expanded by heating in the spheroid from this disclosed processing technology, spheroid is heated still and expands, and obviously weakens reaction speed after can't resolve volumetric expansion, and heating temp hangs down this problem.
Summary of the invention
After solving traditional exothermic mixture volumetric expansion, obviously weaken reaction speed; Heating temp hangs down this shortcoming; The purpose of this invention is to provide a kind of novel molded cap ball composite heating agent and production method thereof, solved the problems referred to above that traditional exothermic mixture exists.
For achieving the above object; Novel molded cap ball composite heating agent according to the invention is made up of spheroid and the outer inclusion of spheroid, and said spheroid is to be processed into by the raw material process of following percentage by weight: aluminium powder 12～14%, sodium nitrate 10～20%, brown iron oxide 40～50%, fluorite powder 20～25% and bond 0.5～1%; The outer inclusion of said spheroid is made up of acidifying graphite, and the mass ratio of the outer inclusion of said spheroid and spheroid is 100:5～10.
Wherein, said bond is phenolic resins (quality index is free phenol＜3%).
For obtaining product of the present invention, the production method that the present invention takes may further comprise the steps:
Aluminium powder, sodium nitrate, brown iron oxide, the fluorite powder raw material of said weight proportion are mixed; Be transported to successively respectively in the planet kolleroang and stirred 15～20 minutes; Stirred altogether 60～80 minutes, the bond that takes by weighing weight proportion is then sent into the interior continuation stirring of planet kolleroang 20～30 minutes, stirs into compound; Be the compound of spheroid part, subsequent use; With above-mentioned compound in conveyer belt is transported to the high-pressure spiral machine; Compound is pressed into 60 tons of spherical mould inner high voltage moulding spheroids in two huge rock friction presses through the high-pressure spiral machine; The spheroid of moulding is released mould through forcing press, sends into conveyor delivery then and in packing machine, the moulding spheroid is carried out the packing first time; Outer outer complex acid fossil China ink carries out the second time and packs spheroid after carrying out packing for the first time according to the mass ratio of spheroid and acidifying graphite 100:5～10 then, and the spheroid after pack the second time is qualified products.
The product that obtains according to technical scheme of the present invention is heated at steel casting use spheroid and does not expand basically, and the density (concentration) that spheroid internal heat generation reaction raw material aluminium powder, sodium nitrate, brown iron oxide and fluorite powder are formed does not change.
In the steel-making casting process, molten steel slowly is raised to mold top cap oral area position from the ingot mold bottom along ingot mold, stops to water steel then; Molten steel is rapid solidification shrinkage in mould, owing to solidify cap mouth center molten steel after coagulation earlier around the cap mouth; Cap oral area position ingot casting head forms " V " font and shrinks, and before not being completed into " V " font, drops into one bag of this novel molded cap ball composite heating agent product to this cap mouth place; Acidifying this moment graphite expands rapidly outside spheroid and is incubated, and after spheroid contacted molten steel or solidifies red-hot steel billet, violent combustion heating began to light a fire; Actual combustion temperature reaches more than 1650 ℃; Slowly solidify under the acidifying graphite insulation of expanding then the bottom that makes the strand refuse of having solidified around the cap mouth add to " V " shape, has realized that fully the cap mouth prevents the shrinkage cavity purpose.
The invention has the beneficial effects as follows: the novel molded cap ball composite heating agent of the present invention has solved traditional exothermic mixture and has weakened thermit reaction speed because of composite acidifying graphite expansion, and heating temp is undesirable, and shrinkage cavity is dark, and lumber recovery hangs down problem.This novel molded cap ball composite heating agent is swift in response, and heating temp can reach more than 1650 ℃, has realized secondary feeding effect fully; The strand head forms good " dish " and shrinks; The strand lumber recovery has improved more than 7%, and reduces the content of aluminium powder widely, has reduced production cost.
The specific embodiment
Novel molded cap ball composite heating agent according to the invention is made up of spheroid (heating part) and the outer inclusion (insulating sections) of spheroid, and said spheroid is to be processed into by the raw material process of following percentage by weight: aluminium powder 12～14%, sodium nitrate 10～20%, brown iron oxide 40～50%, fluorite powder 20～25% and bond 0.5～1%; The outer inclusion of said spheroid is made up of acidifying graphite, and the mass ratio of the outer inclusion of said spheroid and spheroid is 100:5～10.
Wherein, said bond is phenolic resins (quality index is free phenol＜3%).
For obtaining product of the present invention, the production method that the present invention takes may further comprise the steps:
Aluminium powder, sodium nitrate, brown iron oxide, the fluorite powder raw material of said weight proportion are mixed; Be transported to successively respectively in the planet kolleroang and stirred 15～20 minutes; Stirred altogether 60～80 minutes, the bond that takes by weighing weight proportion is then sent into the interior continuation stirring of planet kolleroang 20～30 minutes, stirs into compound; Be the compound of spheroid part, subsequent use; With above-mentioned compound in conveyer belt is transported to the high-pressure spiral machine; Compound is pressed into 60 tons of spherical mould inner high voltage moulding spheroids in two huge rock friction presses through the high-pressure spiral machine; The spheroid of moulding is released mould through forcing press, sends into conveyor delivery then and in packing machine, the moulding spheroid is carried out the packing first time; Outer outer complex acid fossil China ink carries out the second time and packs spheroid after carrying out packing for the first time according to the mass ratio of spheroid and acidifying graphite 100:5～10 then, and the spheroid after pack the second time is qualified products.
To participate in thermit reaction raw material metal aluminium, sodium nitrate, Iron Ore Powder, fluorite powder pulverulent material directly combines with bond; Be pressed into the spheroid of a certain size specification with 60 tons of two huge rock friction presses; Each spheroid is respectively charged in the woven bag (or film); Outer more at last complex acid fossil China ink carries out the packing second time (parcel), then the tying packing.Spheroid weight size is to confirm according to ingot casting weight size, is generally 1kg, 1.5kg and 2kg.
Embodiment 1: novel molded cap ball composite heating agent according to the invention is made up of spheroid (heating part) and the outer inclusion (insulating sections) of spheroid, and said spheroid is to be processed into by the raw material process of following percentage by weight: aluminium powder 12%, sodium nitrate 15%, brown iron oxide 47.5%, fluorite powder 25% and phenolic resin binder 0.5%; The outer inclusion of said spheroid is made up of acidifying graphite, and the mass ratio of the outer inclusion of said spheroid and spheroid is 100:5.
For obtaining product of the present invention, the production method that the present invention takes may further comprise the steps:
Aluminium powder, sodium nitrate, brown iron oxide, the fluorite powder raw material of said weight proportion are mixed; Be transported to successively respectively in the planet kolleroang and stirred 15～20 minutes; Stirred altogether 60～80 minutes, the bond that takes by weighing weight proportion is then sent into the interior continuation stirring of planet kolleroang 20～30 minutes, stirs into compound; Be the compound of spheroid part, subsequent use; With above-mentioned compound in conveyer belt is transported to the high-pressure spiral machine; Compound is pressed into 60 tons of spherical mould inner high voltage moulding spheroids in two huge rock friction presses through the high-pressure spiral machine; The spheroid of moulding is released mould through forcing press, sends into conveyor delivery then and in packing machine, the moulding spheroid is carried out the packing first time; Outer outer complex acid fossil China ink carries out the second time and packs spheroid after carrying out packing for the first time according to the mass ratio of spheroid and acidifying graphite 100:5～10 then, and the spheroid after pack the second time is qualified products.
The content that above-mentioned novel molded cap ball composite heating agent reduces aluminium powder reaches 18%, has reduced production cost; And because of the outer complex acid fossil China ink of spheroid; After reacting, the spheroid igniting accelerated reaction speed; Heating temp reaches more than 1600 ℃, has realized secondary feeding effect fully, and strand header cap mouth is shunk to " dish " by original " V " shape; Form good " dish " and shrink, the strand lumber recovery has improved more than 7%.
Embodiment 2: novel molded cap ball composite heating agent according to the invention is made up of spheroid (heating part) and the outer inclusion (insulating sections) of spheroid, and said spheroid is to be processed into by the raw material process of following percentage by weight: aluminium powder 13.2%, sodium nitrate 16%, brown iron oxide 50%, fluorite powder 20% and phenolic resins 0.8%; The outer inclusion of said spheroid is made up of acidifying graphite, and the mass ratio of the outer inclusion of said spheroid and spheroid is 100:8.
The production method that the present invention takes is with embodiment 1.
The content that above-mentioned novel molded cap ball composite heating agent reduces aluminium powder reaches 16.8%, has reduced production cost; And because of the outer complex acid fossil China ink of spheroid; After reacting, the spheroid igniting accelerated reaction speed; Heating temp reaches more than 1640 ℃, has realized secondary feeding effect fully, and strand header cap mouth is shunk to " dish " by original " V " shape; Form good " dish " and shrink, the strand lumber recovery has improved more than 8%.
Embodiment 3: novel molded cap ball composite heating agent according to the invention is made up of spheroid (heating part) and the outer inclusion (insulating sections) of spheroid, and said spheroid is to be processed into by the raw material process of following percentage by weight: aluminium powder 14%, sodium nitrate 20%, brown iron oxide 42%, fluorite powder 23% and phenolic resins 1%; The outer inclusion of said spheroid is made up of acidifying graphite, and the mass ratio of the outer inclusion of said spheroid and spheroid is 100:10.
The production method that the present invention takes is with embodiment 1.
The content that above-mentioned novel molded cap ball composite heating agent reduces aluminium powder reaches 16%, has reduced production cost; And because of the outer complex acid fossil China ink of spheroid; After reacting, the spheroid igniting accelerated reaction speed; Heating temp reaches more than 1650 ℃, has realized secondary feeding effect, and strand header cap mouth is shunk to " dish " by original " V " shape; Form good " dish " and shrink, the strand lumber recovery has improved more than 9%.
Above the outer complex acid fossil China ink of said novel molded cap ball composite heating agent spheroid and spheroid produce with package design principle and this series products production technology and all should belong to protection scope of the present invention.
Claims (2)
1. molded cap ball composite heating agent; Said molded cap ball composite heating agent is made up of spheroid and the outer inclusion of spheroid, and said spheroid is to be processed into by the raw material process of following percentage by weight: sodium nitrate 10～20%, brown iron oxide 40～50%, fluorite powder 20～25% and aluminium powder and bond; It is characterized in that: the percentage by weight of said aluminium powder and bond is respectively 12～14% and 0.5～1%; The outer inclusion of said spheroid is made up of acidifying graphite, and the mass ratio of the outer inclusion of said spheroid and spheroid is 100:5～8; Said bond is a phenolic resins.
2. production method of molded cap ball composite heating agent according to claim 1, this production method may further comprise the steps:
Aluminium powder, sodium nitrate, brown iron oxide, the fluorite powder raw material of said weight proportion are mixed; Be transported to successively respectively in the planet kolleroang and stirred 15～20 minutes; Stirred altogether 60～80 minutes, the bond that takes by weighing weight proportion is then sent into the interior continuation stirring of planet kolleroang 20～30 minutes, stirs into compound; Be the compound of spheroid part, subsequent use; With above-mentioned compound in conveyer belt is transported to the high-pressure spiral machine; Compound is pressed into 60 tons of spherical mould inner high voltage moulding spheroids in two huge rock friction presses through the high-pressure spiral machine; The spheroid of moulding is released mould through forcing press, sends into conveyor delivery then and in packing machine, the moulding spheroid is carried out the packing first time; Outer outer complex acid fossil China ink carries out the second time and packs spheroid after carrying out packing for the first time according to the mass ratio of spheroid and acidifying graphite 100:5～8 then, and the spheroid after pack the second time is qualified products.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110044024 CN102091758B (en) | 2011-02-24 | 2011-02-24 | Novel die cast cap port sphere composite heating agent and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110044024 CN102091758B (en) | 2011-02-24 | 2011-02-24 | Novel die cast cap port sphere composite heating agent and production method thereof |
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| CN102091758A CN102091758A (en) | 2011-06-15 |
| CN102091758B true CN102091758B (en) | 2012-12-05 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102825217A (en) * | 2012-07-31 | 2012-12-19 | 马鞍山科润冶金材料有限公司 | Composite heat generating agent for die steel |
| CN102825224A (en) * | 2012-07-31 | 2012-12-19 | 马鞍山科润冶金材料有限公司 | Composite heat generating agent for weathering steel |
| CN102814475A (en) * | 2012-07-31 | 2012-12-12 | 马鞍山科润冶金材料有限公司 | Heating agent for casting stainless steel ingot heads and preparation method of heating agent |
| CN103962509B (en) * | 2014-05-03 | 2016-09-07 | 焦作鸽德新材料股份有限公司 | A kind of heat preservation Riser material and preparation method thereof |
| CN104439125B (en) * | 2014-12-22 | 2016-11-09 | 河南省西保冶材集团有限公司 | The special anticrater agent of stainless steel ingot rising head |
| 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 |
| 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 |
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| US3867155A (en) * | 1973-10-31 | 1975-02-18 | Cons Ceramic Products | Smokeless exothermic hot topping compositions |
| JPS5951382B2 (en) * | 1979-07-11 | 1984-12-13 | 滲透工業株式会社 | Heater plate on top of riser |
| CN1327994C (en) * | 2005-03-22 | 2007-07-25 | 浙江湖州红鹰企业集团有限公司 | Heat preservation agent in use for molded casting, and producing technique |
| CN101642799B (en) * | 2009-08-19 | 2012-12-05 | 西峡县鑫龙保温材料有限公司 | Molded cap ball composite heating agent and production process thereof |
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