JPH0241746A - Heat insulating material for molten metal and manufacture thereof - Google Patents
Heat insulating material for molten metal and manufacture thereofInfo
- Publication number
- JPH0241746A JPH0241746A JP19164088A JP19164088A JPH0241746A JP H0241746 A JPH0241746 A JP H0241746A JP 19164088 A JP19164088 A JP 19164088A JP 19164088 A JP19164088 A JP 19164088A JP H0241746 A JPH0241746 A JP H0241746A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- heat insulating
- insulating material
- resistant powder
- core material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011810 insulating material Substances 0.000 title claims abstract description 61
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 16
- 239000002184 metal Substances 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 19
- 239000000843 powder Substances 0.000 claims abstract description 51
- 239000011162 core material Substances 0.000 claims abstract description 32
- 239000011230 binding agent Substances 0.000 claims abstract description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims description 11
- 230000005484 gravity Effects 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 239000011247 coating layer Substances 0.000 claims description 7
- 239000010410 layer Substances 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000005909 Kieselgur Substances 0.000 claims description 3
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 239000010451 perlite Substances 0.000 claims description 3
- 235000019362 perlite Nutrition 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 229940043430 calcium compound Drugs 0.000 claims description 2
- 150000001674 calcium compounds Chemical class 0.000 claims description 2
- 239000012774 insulation material Substances 0.000 claims description 2
- 150000002681 magnesium compounds Chemical class 0.000 claims description 2
- 150000004760 silicates Chemical class 0.000 claims description 2
- 239000002356 single layer Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 239000004115 Sodium Silicate Substances 0.000 abstract description 2
- 238000007872 degassing Methods 0.000 abstract description 2
- 229910052911 sodium silicate Inorganic materials 0.000 abstract description 2
- 238000005187 foaming Methods 0.000 abstract 1
- 229910010272 inorganic material Inorganic materials 0.000 abstract 1
- 239000011147 inorganic material Substances 0.000 abstract 1
- 239000011368 organic material Substances 0.000 abstract 1
- PVGBHEUCHKGFQP-UHFFFAOYSA-N sodium;n-[5-amino-2-(4-aminophenyl)sulfonylphenyl]sulfonylacetamide Chemical compound [Na+].CC(=O)NS(=O)(=O)C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=C1 PVGBHEUCHKGFQP-UHFFFAOYSA-N 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 9
- 229910052742 iron Inorganic materials 0.000 description 6
- 238000000576 coating method Methods 0.000 description 4
- 238000009749 continuous casting Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000002436 steel type Substances 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000012798 spherical particle Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical class [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- GBCAVSYHPPARHX-UHFFFAOYSA-M n'-cyclohexyl-n-[2-(4-methylmorpholin-4-ium-4-yl)ethyl]methanediimine;4-methylbenzenesulfonate Chemical compound CC1=CC=C(S([O-])(=O)=O)C=C1.C1CCCCC1N=C=NCC[N+]1(C)CCOCC1 GBCAVSYHPPARHX-UHFFFAOYSA-M 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229910052705 radium Inorganic materials 0.000 description 1
- HCWPIIXVSYCSAN-UHFFFAOYSA-N radium atom Chemical compound [Ra] HCWPIIXVSYCSAN-UHFFFAOYSA-N 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は製鉄、製鋼分野における溶鉄、溶鋼等の溶融し
た金属の表面温度の低下を防止する保温材及びその製造
方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat insulating material that prevents a decrease in the surface temperature of molten metal such as molten iron and molten steel in the field of iron and steel manufacturing, and a method for manufacturing the same.
従来、転炉、電気炉から取鍋及び連鋳タンデイツシュに
出鋼した溶鋼や、溶鉄における表面温度が低下しないよ
うにするために使用されている保温材としては、焼切や
生籾、その他にバルプスラジ等の焼成成形品等からなる
保温材が知られている。Conventionally, heat insulating materials have been used to prevent the surface temperature of molten steel and molten iron from dropping from converters and electric furnaces into ladles and continuous casting tandems. 2. Description of the Related Art Heat insulating materials made of fired molded products such as bulpus radium are known.
しかしながら、上記従来の保温材は溶融金属の表面温度
の保温能力において未だ満足の得られるものではなく、
また溶鋼や溶鉄の場面への注入に当たってもその充填具
合いが不十分であるという問題がある。また、籾等の保
温材を極低炭素鋼の溶鋼等に使用した場合、保温材に含
有されたカーボンが溶鋼中に浸炭してしまうという不具
合が生じ、その結果、製鋼された製品の加工性等が著し
く低下してしまい、この不具合は例えば炭素含有量が０
． ＯＯ５％程度の極めて低い鋼種に対して使用すると
、鋼のカーボンピックアツプ量が５１’Ｐｍ以上となっ
てしまうため、上記のような鋼種には籾等からなる保温
材の適用できないという結果を招いていた。However, the above-mentioned conventional heat insulating materials are still not satisfactory in their ability to maintain the surface temperature of molten metal.
Furthermore, even when molten steel or molten iron is injected into a field, there is a problem in that the filling level is insufficient. In addition, when heat insulating materials such as rice grains are used for molten steel such as ultra-low carbon steel, there is a problem that the carbon contained in the heat insulating material carburizes into the molten steel, resulting in poor workability of the steel products. etc., and this problem occurs, for example, when the carbon content is 0.
．． If it is used for a steel type with extremely low OO of about 5%, the carbon pick-up amount of the steel will be 51'Pm or more, resulting in the inability to apply heat insulating materials made of rice, etc. to the above steel types. was.
また保温材の使用に際しても、取鍋や連鋳タンデイツシ
ュ内の溶融金属面に添加する時点、又は詩人後の排滓時
に取鍋を傾倒する時点等において発塵が作業人等の皮膚
に刺さったり、或いは発煙が作業環境を悪化させる欠点
があった。更に、保温材粒子どうしが凝固してしまった
り、保温材自体が固化してしまう不具合があった。しか
も焼切等からなる保温材では化合水及び付着水分が多い
ため、このような保温材を連鋳タンプッシュに使用した
場合、製品にピンホールが発生する原因となる問題があ
った。Furthermore, when using heat insulating materials, dust may get stuck in the skin of workers etc. at the time of adding it to the molten metal surface in the ladle or continuous casting tundish, or at the time of tilting the ladle when removing the slag after pouring. Also, there was a drawback that smoke generation deteriorated the working environment. Furthermore, there was a problem that the heat insulating material particles coagulated with each other or the heat insulating material itself solidified. Moreover, heat insulating materials made of burnt-off materials have a large amount of compound water and attached moisture, so when such heat insulating materials are used in continuous casting tongue pushers, there is a problem in that pinholes occur in the product.
本発明は上記課題を解消するためになされたもので、溶
融した金属の表面温度に対する保温効果に優れ、カーボ
ンの浸炭等の問題がなく、取り扱いや作業性が良好な溶
融金属の保温材を提供するとともに、このような保温材
を安価に製造し得ることができる製造方法を提供するこ
とを目的とするものである。The present invention has been made to solve the above problems, and provides a heat insulating material for molten metal that has an excellent heat insulating effect on the surface temperature of molten metal, is free from problems such as carbon carburization, and is easy to handle and work. In addition, it is an object of the present invention to provide a manufacturing method that can manufacture such a heat insulating material at low cost.
本発明は、特許請求の範囲として、
「（１）耐熱性粉体と、該耐熱性粉体よりも見掛比重が
小さい芯材とからなることを特徴とする溶融金属の保温
材。The present invention provides the following claims: ``(1) A heat insulating material for molten metal comprising a heat-resistant powder and a core material whose apparent specific gravity is smaller than that of the heat-resistant powder.
（２）全体が球形状の粒子である請求項１記載の保温材
。(2) The heat insulating material according to claim 1, wherein the entire particle is spherical.
（３）粒径が異なる保温材が混在する請求項１又は２記
載の保温材。(3) The heat insulating material according to claim 1 or 2, wherein heat insulating materials having different particle sizes are mixed.
（４）芯材の表面に耐熱性粉体が含有された被覆層を単
層若しくは多層に設けてなる請求項１〜３のいずれかに
記載の保温材。(4) The heat insulating material according to any one of claims 1 to 3, wherein a coating layer containing heat-resistant powder is provided on the surface of the core material in a single layer or in multiple layers.
（５）耐熱性棚体と芯材とを混在させて形成してなる請
求項１〜３のいずれかに記載の保温材。(5) The heat insulating material according to any one of claims 1 to 3, which is formed by mixing a heat-resistant shelf and a core material.
（６）芯材が、無機物質からなる中空体又は有機物質か
らなる発泡体である請求項１〜５のいずれかに記載の保
温材。(6) The heat insulating material according to any one of claims 1 to 5, wherein the core material is a hollow body made of an inorganic substance or a foamed body made of an organic substance.
（７）耐熱性粉体が、珪藻土、パーライト、天然多孔性
物質、二酸化珪素、珪酸化合物、カルシウム化合物、ア
ルミニウム化合物、マグネシウム化合物からなる群より
選ばれたもの、又はそれらの混合物である請求項１〜６
のいずれかに記載の保温材。(7) The heat-resistant powder is selected from the group consisting of diatomaceous earth, perlite, natural porous materials, silicon dioxide, silicate compounds, calcium compounds, aluminum compounds, and magnesium compounds, or a mixture thereof. ~6
Thermal insulation material described in any of the above.
（８）耐熱性粉体よりも見掛比重が小さい芯材にバイン
ダーを塗布し、次いで耐熱性粉体を塗布することを特徴
とする溶融金属の保温材の製造方法。(8) A method for producing a heat insulating material for molten metal, which comprises applying a binder to a core material whose apparent specific gravity is smaller than that of the heat-resistant powder, and then applying the heat-resistant powder.
（９）芯材を混合機で撹拌しつつバインダーを噴霧し、
次いで耐熱性粉体を投入してバインダー層に付着させる
請求項８記載の製造方法。(9) Spraying the binder while stirring the core material with a mixer,
9. The manufacturing method according to claim 8, wherein the heat-resistant powder is then added and adhered to the binder layer.
（１０）耐熱性粉体の投入を、混合機上に設置した篩に
耐熱性粉体を入れて該篩を振動させて行う請求項９記載
の製造方法。(10) The manufacturing method according to claim 9, wherein the heat-resistant powder is introduced by putting the heat-resistant powder into a sieve placed on a mixer and vibrating the sieve.
（１１）耐熱性粉体よりも見掛比重が小さい芯材と耐熱
性粉体とを混合機で混合し、次いでパインダ−を加えて
混練した後、この混合物を押出成形にて造粒することを
特徴とする溶融金属の保温材の製造方法。」
からなるものである。(11) Mixing the core material, which has an apparent specific gravity smaller than that of the heat-resistant powder, with the heat-resistant powder in a mixer, then adding a binder and kneading, and then granulating this mixture by extrusion molding. A method for manufacturing a molten metal heat insulating material, characterized by: ”.
以下、本発明の実施例を図面に基づき説明する。 Embodiments of the present invention will be described below based on the drawings.
本発明の溶融金属の保温材は、第１図〜第３図に示すよ
うに耐熱性粉体１と、該耐熱性粉体１よりも見掛比重が
小さい芯材２とから構成されたものである。The molten metal heat insulating material of the present invention is composed of a heat-resistant powder 1 and a core material 2 whose apparent specific gravity is smaller than that of the heat-resistant powder 1, as shown in FIGS. 1 to 3. It is.
本発明保温材はその全体形状が球形状の粒子であり、ま
た球状粒子の粒径が異なる保温材が混在したものである
。The heat insulating material of the present invention has particles whose overall shape is spherical, and is a mixture of heat insulating materials having spherical particles with different particle sizes.
また本発明保温材は、第１図及び第２図の如き芯材２の
表面に耐熱性粉体が含有された被覆層３を設げた構造や
、或いは第３図の如き耐熱粉体１と芯材２とを混在させ
て形成した構造からなる。Further, the heat insulating material of the present invention has a structure in which a coating layer 3 containing heat-resistant powder is provided on the surface of a core material 2 as shown in FIGS. 1 and 2, or a structure in which a coating layer 3 containing heat-resistant powder is provided as shown in FIG. It has a structure formed by mixing the core material 2.
被覆Ｎ３を有する構造の場合、被覆Ｎ３は第１図に図示
の如くバインダー４に耐熱性粉体Ｉが均一に内在するも
のであっても、第２図に図示の如くバインダー４等から
なる中間層の表面部分に耐熱粉体１が均一に付着したも
のであってもよい。In the case of a structure having a coating N3, the coating N3 is an intermediate layer consisting of the binder 4, etc., as shown in FIG. The heat-resistant powder 1 may be uniformly adhered to the surface portion of the layer.
上記耐熱性粉体１としては、珪藻土、パーライト、天然
多孔性物質、二酸化珪素、珪酸化合物カルシウム化合物
、アルミニウム化合物、マクネシウム化合物等や、或い
はこれらの混合物等が挙げられる。粉体１は特に耐熱特
性が良好であることが必要であり、融点が高いもの程好
ましい。その意味でマグネシアは耐熱温度が１５（１０
°Ｃ以上であり、他の原料との反応性が低く、融点開始
温度が低下することがない点で好適である。Examples of the heat-resistant powder 1 include diatomaceous earth, perlite, natural porous materials, silicon dioxide, calcium silicate compounds, aluminum compounds, manesium compounds, and mixtures thereof. The powder 1 must particularly have good heat resistance properties, and the higher the melting point, the more preferable it is. In that sense, magnesia has a heat resistance temperature of 15 (10
°C or higher, is suitable because it has low reactivity with other raw materials and does not lower the melting point starting temperature.
本発明に使用される芯材２は耐熱性粉体１に比べて見掛
比重が小さいものであれば特に限定されるものではな（
、例えば各種の無機物質からなる中空体（バルーン）や
有機物質からなる発泡体を使用することができる。その
具体的材質として、中空体としてはガラスバルーン、パ
ーライトバルーン、シラスバルーン、シリカバルーン等
カ挙ケられ、−力先泡体としてはポリエチレン、アクリ
ル−スチレン共重合体、塩化ビニリデン、ポリスチレン
等からなる発泡ビーズが好適である。The core material 2 used in the present invention is not particularly limited as long as it has a smaller apparent specific gravity than the heat-resistant powder 1 (
For example, hollow bodies (balloons) made of various inorganic substances or foamed bodies made of organic substances can be used. Specific materials include hollow bodies such as glass balloons, pearlite balloons, glass balloons, and silica balloons, and foams made of polyethylene, acrylic-styrene copolymers, vinylidene chloride, polystyrene, etc. Foamed beads are preferred.
バインダー４としては、例えばケイ酸ソーダ及びＣＭＣ
等を用いることができる。As the binder 4, for example, sodium silicate and CMC
etc. can be used.
本発明の保温材の一例を挙げれば、耐熱性粉体として酸
化マグネシウムを用い、芯材としてパーライト発泡体を
用いて球状粒子からなる保温材を造粒し、その保温材に
おける化学成分及び物性について下記に示す。To give an example of the heat insulating material of the present invention, a heat insulating material made of spherical particles is granulated using magnesium oxide as a heat-resistant powder and pearlite foam as a core material, and the chemical components and physical properties of the heat insulating material are Shown below.
また本発明の保温材は粒径の異なるものが混在している
が、特に極低炭素鋼用の保温材として使用する場合、そ
の保温材の粒径分布は例えば下記に示すような粒径分布
のものが好ましい。In addition, the heat insulating material of the present invention has a mixture of particles with different particle sizes, but especially when used as a heat insulating material for ultra-low carbon steel, the particle size distribution of the heat insulating material is, for example, as shown below. Preferably.
次に、上記の如き構成からなる保温材の製造方法につい
て詳細に説明する。Next, a method for manufacturing a heat insulating material having the above structure will be described in detail.
本発明の製造方法は、前記芯材２にバインダ４を塗布し
、次いで耐熱性粉体１を塗布することにより保温材を得
る。バインダー４の塗布は公知の混合機に芯材を投入し
て撹拌しつつ、バインダー４を噴霧することによって均
一な塗布が行われる。このようにバインダー４を塗布し
た後、引き続き塗布後の芯材２を混合機で撹拌しつつ、
耐熱性粉体１を少量ずつ添加することにより粉体】の塗
布が行われる。この粉体の塗布に際して混合機上に篩を
設置し、その部内に耐熱性粉体１を投入し、適宜手段に
て篩を振動させて粉体１を混合機内に散布することによ
って、より均一な塗布ができる。以上のようにバインダ
ーと粉体を塗布したものは、必要に応して乾燥・焼成処
理等を施した後に保温材となる。上記製造方法ではバイ
ンダーの塗布量、硬化状態等の条件を適宜調整すること
により、バインダー４中に粉体１を内在させて第１図に
図示したような構成の被覆層３を有する保温材を形成し
たり、或いはバインダー４の表面上に粉体１を付着させ
て第２図に図示したような構成の被覆層３を有する保温
材を形成することができる。In the manufacturing method of the present invention, a heat insulating material is obtained by applying a binder 4 to the core material 2 and then applying a heat-resistant powder 1 thereto. The binder 4 is uniformly applied by spraying the binder 4 while stirring the core material in a known mixer. After applying the binder 4 in this way, while stirring the applied core material 2 with a mixer,
Powder] is applied by adding heat-resistant powder 1 little by little. When applying this powder, a sieve is installed on the mixer, the heat-resistant powder 1 is put into the sieve, and the sieve is vibrated by an appropriate means to spread the powder 1 into the mixer more uniformly. It is possible to apply various coatings. The material coated with the binder and powder as described above becomes a heat insulating material after being subjected to drying, firing, etc. as necessary. In the above manufacturing method, by appropriately adjusting the conditions such as the amount of binder applied and the curing state, a heat insulating material having the coating layer 3 having the structure shown in FIG. Alternatively, the powder 1 can be attached on the surface of the binder 4 to form a heat insulating material having the coating layer 3 having the structure as shown in FIG.
また本発明の製造方法では、芯材２と耐熱性粉体１とを
混合機に投入して均一に混合し、次いで混合機内にバイ
ンダー４を投入して混練した後、この混合物を押出成形
機にて押出しつつ切断して造粒し、しかる後、この造粒
物を必要に応して乾燥・焼成処理をすることにより、第
３図に示すような保温材を得ることができる。Further, in the manufacturing method of the present invention, the core material 2 and the heat-resistant powder 1 are put into a mixer and mixed uniformly, and then the binder 4 is put into the mixer and kneaded, and then this mixture is put into an extrusion molding machine. The heat insulating material as shown in FIG. 3 can be obtained by cutting and granulating the material while extruding it, and then subjecting the granulated product to drying and firing treatment as required.
なお本発明の保温材は、■取鍋、真空脱ガス、押湯、溶
鉄車等の溶鋼、溶鉄の場面保護用、■連鋳タンデイツシ
ュ用、■押湯頂面フリカケ材の保温強化用等の各種用途
に使用できる。The heat insulating material of the present invention can be used to: ■ protect molten steel and molten iron in ladles, vacuum degassing, feeders, molten iron cars, etc., ■ use continuous casting tandem, ■ strengthen heat retention of feeder top surface materials, etc. Can be used for various purposes.
以上説明したように、本発明の保温材は耐熱性粉体と該
粉体よりも小さい見掛比重の芯材にて構成されているた
め優れた保温能力を有している。As explained above, the heat insulating material of the present invention is composed of a heat-resistant powder and a core material having an apparent specific gravity smaller than that of the powder, and therefore has excellent heat retaining ability.
また全体形状が球形状であり、しかも粒径が異なるもの
が混在しているため溶融金属面へ密に充填注入すること
ができ、特に細粒が粗粒の隙間を埋め下方に集中して充
填される傾向が生じるため、従来の保温材のように不定
形状で大きさが略一定したものに比べ、保温性、脱気性
の向上を図ることができる。優れた保温効果は芯材とし
て中空体又は発泡体を用いることによっても得られる。In addition, since the overall shape is spherical and particles of different sizes are mixed, it is possible to densely fill and inject into the molten metal surface, especially fine particles fill the gaps between coarse particles and concentrate downward. Therefore, it is possible to improve heat retention and degassing properties compared to conventional heat insulating materials that have an irregular shape and a substantially constant size. Excellent heat retention effects can also be obtained by using a hollow body or foam as a core material.
また保温材の使用に際しても、保温材注入時における拡
散性が良好で作業性に優れており、作業時の発塵、発煙
の発生がなく作業環境の保全を図ることができる利点が
ある。Furthermore, when using a heat insulating material, the heat insulating material has good diffusivity when injected and is excellent in workability, and has the advantage of being able to maintain the working environment without generating dust or smoke during work.
更に本発明保温材はカーボン含有量が少ない材質を使用
することができるため、極低炭素含有鋼に使用してもカ
ーボンが浸炭してしまう不具合が殆どなく、例えば、炭
素含有量がＯ，ＯＯ３％の鋼種の連鋳タンデイツシュに
使用したところカーボンピックアツプ量はｌｐｐｍ未満
という極めて低い値となり、その結果、カーボンの浸炭
による製鋼の加工性等の低下を確実に防止することがで
き、高品質な製品の製造が可能となる。また更に含有水
分が非常に少ない材質にて構成することができるため、
製品においてのピンホール発生となる悪因を排除するこ
とができ、実際には含有水分量を０．８％未満にコント
ロールすることができる。Furthermore, since the heat insulating material of the present invention can be made of a material with a low carbon content, there is almost no problem of carburization of carbon even if it is used for extremely low carbon content steel. When used in continuously cast tandem tubing of steel types of 1.5%, the carbon pick-up amount was extremely low, less than lppm, and as a result, it was possible to reliably prevent deterioration of workability of steel due to carburization of carbon, resulting in high quality. It becomes possible to manufacture products. Furthermore, since it can be constructed from materials with very low moisture content,
It is possible to eliminate the harmful causes of pinholes in the product, and the water content can actually be controlled to less than 0.8%.
本発明の製造方法によれば、上記したような優れた保温
材を簡素な工程、手段にて安価に製造し得ることができ
、構成原料も常時安定して得られるものであるため間断
なく保温材の供給を行うことが可能である。According to the manufacturing method of the present invention, the above-mentioned excellent heat insulating material can be manufactured at low cost using simple processes and means, and since the constituent raw materials are always stably obtained, it can be kept warm without interruption. It is possible to supply materials.
第１図〜第３図は本発明の保温材の一例を示す断面略図
である。
１・・耐熱性粉体 ２・・芯材
３・・被覆層
４・ ・バインダー
特許出願人 株式会社エヌ・チー・シー１・・・耐熱性
粉体
２・・・芯材
３・・・被覆層
４・・・パインタ
第２
第３1 to 3 are schematic cross-sectional views showing an example of the heat insulating material of the present invention. 1. Heat-resistant powder 2. Core material 3. Coating layer 4. Binder patent applicant NCC Corporation 1. Heat-resistant powder 2. Core material 3. Coating. Layer 4... Pineta 2nd 3rd
Claims (11)
さい芯材とからなることを特徴とする溶融金属の保温材
。(1) A molten metal heat insulating material comprising a heat-resistant powder and a core material whose apparent specific gravity is smaller than that of the heat-resistant powder.
。(2) The heat insulating material according to claim 1, wherein the entire particle is spherical.
載の保温材。(3) The heat insulating material according to claim 1 or 2, wherein heat insulating materials having different particle sizes are mixed.
層若しくは多層に設けてなる請求項１〜３のいずれかに
記載の保温材。(4) The heat insulating material according to any one of claims 1 to 3, wherein a coating layer containing heat-resistant powder is provided on the surface of the core material in a single layer or in multiple layers.
求項１〜３のいずれかに記載の保温材。(5) The heat insulating material according to any one of claims 1 to 3, which is formed by mixing a heat-resistant shelf and a core material.
らなる発泡体である請求項１〜５のいずれかに記載の保
温材。(6) The heat insulating material according to any one of claims 1 to 5, wherein the core material is a hollow body made of an inorganic substance or a foamed body made of an organic substance.
物質、二酸化珪素、珪酸化合物、カルシウム化合物、ア
ルミニウム化合物、マグネシウム化合物からなる群より
選ばれたもの、又はそれらの混合物である請求項１〜６
のいずれかに記載の保温材。(7) The heat-resistant powder is selected from the group consisting of diatomaceous earth, perlite, natural porous materials, silicon dioxide, silicate compounds, calcium compounds, aluminum compounds, and magnesium compounds, or a mixture thereof. ~6
Thermal insulation material described in any of the above.
ダーを塗布し、次いで耐熱性粉体を塗布することを特徴
とする溶融金属の保温材の製造方法。(8) A method for producing a heat insulating material for molten metal, which comprises applying a binder to a core material whose apparent specific gravity is smaller than that of the heat-resistant powder, and then applying the heat-resistant powder.
次いで耐熱性粉体を投入してバインダー層に付着させる
請求項８記載の製造方法。(9) Spraying the binder while stirring the core material with a mixer,
9. The manufacturing method according to claim 8, wherein the heat-resistant powder is then added and adhered to the binder layer.
耐熱性粉体を入れて該篩を振動させて行う請求項９記載
の製造方法。(10) The manufacturing method according to claim 9, wherein the heat-resistant powder is introduced by putting the heat-resistant powder into a sieve placed on a mixer and vibrating the sieve.
性粉体とを混合機で混合し、次いでバインダーを加えて
混練した後、この混合物を押出成形にて造粒することを
特徴とする溶融金属の保温材の製造方法。(11) The core material, which has an apparent specific gravity smaller than that of the heat-resistant powder, and the heat-resistant powder are mixed in a mixer, then a binder is added and kneaded, and then this mixture is granulated by extrusion molding. Features: A manufacturing method for molten metal heat insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19164088A JPH0241746A (en) | 1988-07-30 | 1988-07-30 | Heat insulating material for molten metal and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19164088A JPH0241746A (en) | 1988-07-30 | 1988-07-30 | Heat insulating material for molten metal and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0241746A true JPH0241746A (en) | 1990-02-09 |
Family
ID=16278020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19164088A Pending JPH0241746A (en) | 1988-07-30 | 1988-07-30 | Heat insulating material for molten metal and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0241746A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05305403A (en) * | 1992-04-28 | 1993-11-19 | Shinagawa Refract Co Ltd | Additive in mold for continuously casting steel and manufacture thereof |
| WO2006058347A3 (en) * | 2004-11-25 | 2006-08-03 | Alistair Allardyce Elrick | Heat resistant bead |
| EP2139626B1 (en) * | 2007-03-16 | 2012-02-08 | Chemex GmbH | Core-sheath particle for use as a filler for feeder masses |
| CN103341606A (en) * | 2013-07-03 | 2013-10-09 | 北京科技大学 | High-magnesium covering agent material capable of being used for tundish and preparing method thereof |
| RU2661981C1 (en) * | 2017-05-30 | 2018-07-23 | Мария Павловна Никифорова | Metal melt thermal insulation composition and the composition manufacturing method |
-
1988
- 1988-07-30 JP JP19164088A patent/JPH0241746A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05305403A (en) * | 1992-04-28 | 1993-11-19 | Shinagawa Refract Co Ltd | Additive in mold for continuously casting steel and manufacture thereof |
| WO2006058347A3 (en) * | 2004-11-25 | 2006-08-03 | Alistair Allardyce Elrick | Heat resistant bead |
| EP2139626B1 (en) * | 2007-03-16 | 2012-02-08 | Chemex GmbH | Core-sheath particle for use as a filler for feeder masses |
| CN103341606A (en) * | 2013-07-03 | 2013-10-09 | 北京科技大学 | High-magnesium covering agent material capable of being used for tundish and preparing method thereof |
| CN103341606B (en) * | 2013-07-03 | 2015-02-11 | 北京科技大学 | High-magnesium covering agent material capable of being used for tundish and preparing method thereof |
| RU2661981C1 (en) * | 2017-05-30 | 2018-07-23 | Мария Павловна Никифорова | Metal melt thermal insulation composition and the composition manufacturing method |
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