JPH03281738A - Filter material for metallic molten metal and method for filtering metallic molten metal by using the same - Google Patents
Filter material for metallic molten metal and method for filtering metallic molten metal by using the sameInfo
- Publication number
- JPH03281738A JPH03281738A JP2083247A JP8324790A JPH03281738A JP H03281738 A JPH03281738 A JP H03281738A JP 2083247 A JP2083247 A JP 2083247A JP 8324790 A JP8324790 A JP 8324790A JP H03281738 A JPH03281738 A JP H03281738A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- filter medium
- metallic
- filter material
- inorganic binder
- 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
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 46
- 239000002184 metal Substances 0.000 title claims abstract description 46
- 238000001914 filtration Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims description 6
- 239000000463 material Substances 0.000 title abstract description 8
- 239000011148 porous material Substances 0.000 claims abstract description 24
- 239000011230 binding agent Substances 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 16
- 239000000919 ceramic Substances 0.000 claims abstract description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 9
- 239000012535 impurity Substances 0.000 abstract description 9
- 239000000203 mixture Substances 0.000 abstract description 8
- 239000007787 solid Substances 0.000 abstract description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract description 4
- 239000011888 foil Substances 0.000 abstract description 4
- 239000011521 glass Substances 0.000 abstract description 4
- 229910010271 silicon carbide Inorganic materials 0.000 abstract description 4
- 229910052581 Si3N4 Inorganic materials 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005096 rolling process Methods 0.000 abstract description 3
- 238000005266 casting Methods 0.000 abstract description 2
- 229910052681 coesite Inorganic materials 0.000 abstract description 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 2
- 238000001035 drying Methods 0.000 abstract description 2
- 238000010304 firing Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 2
- 239000011819 refractory material Substances 0.000 abstract description 2
- 229910052682 stishovite Inorganic materials 0.000 abstract description 2
- 229910052905 tridymite Inorganic materials 0.000 abstract description 2
- 239000011800 void material Substances 0.000 abstract description 2
- 150000002739 metals Chemical class 0.000 abstract 3
- 229910052593 corundum Inorganic materials 0.000 abstract 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 2
- 239000000945 filler Substances 0.000 abstract 1
- 229910003465 moissanite Inorganic materials 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000011575 calcium Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 101100276210 Rhizobium meliloti (strain 1021) cya2 gene Proteins 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- -1 and for this purpose Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
未発ＩＪＩは金属溶湯、特にアルミニウム溶湯中に含ま
れる不純物（介在物）を濾過するための金属溶湯用濾材
とそれを用いた金属溶湯の濾過方法に関する。[Detailed Description of the Invention] [Industrial Application Field] Undeveloped IJI is a molten metal filter material for filtering impurities (inclusions) contained in molten metal, especially molten aluminum, and a filter material for molten metal using the same. Relating to a filtration method.
Ｕ従来の技術］
金属の薄板や箔は金属溶湯なインゴットに鋳造し、これ
を圧延することにより製造される。ところか、金属溶湯
に含まれる金属酸化物や耐火物の微小破片等の固形不純
物かそのままインゴット中に混入すると、これを圧延し
て薄板や箔等を製造する過程てビンポール、表面欠陥が
発生することかある。これを防ぐには、溶湯中から固形
不純物を除去する必要かあり、そのために、従来、ガラ
スクロス、アルミナボーＪし或はセラミックフオーム等
を溶湯濾過用のフィルターとＬノで使用していた。U Prior Art] Metal thin plates and foils are manufactured by casting a molten metal ingot and rolling it. However, if solid impurities such as metal oxides or minute fragments of refractories contained in the molten metal are mixed into the ingot, surface defects will occur during the process of rolling the ingot into thin plates, foils, etc. There is a thing. To prevent this, it is necessary to remove solid impurities from the molten metal, and for this purpose, glass cloth, alumina foam, ceramic foam, etc. have conventionally been used as a filter for filtrating the molten metal.
ところか、ガラスクロスは安価であるか早期に「１詰ま
りし易く、またアルミナボールは一旦捕獲した不純物か
流出し易いため濾過精度に劣り、更にセラミックフオー
ムは気孔径か大きいため微細な不純物な十分に濾過てき
ないという欠点かある。On the other hand, glass cloth is cheap and tends to clog quickly, and alumina balls have poor filtration accuracy because impurities once captured tend to flow out, and ceramic foam has large pores that make it difficult to absorb fine impurities. The drawback is that it cannot be filtered.
そこで、例えば特公昭５２−２２３２７号公報に示され
るように、炭化珪素やアルミナ等の骨材粒子を無１１質
結合材により結合させて骨材粒子間に無数の微細連続気
孔を形成した構成のチューブ状の濾材が使用されつつあ
る。この濾材によれば、上記した他のフィルターに比較
して濾過性能が優れており、目詰まりを長期間にわたり
防止てきまた捕獲した不純物の流出かなく、しかも気孔
径を適切になし得て精密な濾過か可能になるという利点
かある。Therefore, as shown in Japanese Patent Publication No. 52-22327, for example, a structure in which aggregate particles such as silicon carbide or alumina are bonded with an element-free binder to form countless fine continuous pores between the aggregate particles is proposed. Tubular filter media are being used. This filter material has superior filtration performance compared to the other filters mentioned above, prevents clogging for a long time, prevents captured impurities from flowing out, and allows for precise pore size. There is an advantage in that it allows for filtration.
［発明か解決しようとする課題］
しかしながら、−Ｌ述のチューブ状の濾材においても、
チューブ状濾材の機能のバラツキ、金属溶湯の濾過条件
の変化等によってそれぞれ濾過性能か一定とならないた
め、不純物捕集の信頼性か高いとはいえないという問題
かあった。[Problem to be solved by the invention] However, even in the tubular filter medium described in -L,
There was a problem in that the reliability of impurity collection was not high because the filtration performance was not constant due to variations in the function of the tubular filter medium, changes in the filtration conditions for molten metal, etc.
［課題を解決するための手段］
そこて、未発明治は上記従来の問題を解決するため種々
検討を行なったところ、気孔径と空隙率を特定の範囲と
した濾材に、特定量、の金属溶湯な通過させることによ
り、濾過性能を向１−させることかできることを見出し
１本発明に到達した。[Means for Solving the Problems] In order to solve the above-mentioned conventional problems, Minaji conducted various studies and found that a specific amount of metal was added to a filter medium with a specific range of pore size and porosity. The present invention was achieved by discovering that the filtration performance can be improved by passing molten metal through the filter.
ｔｉｌｌち、本発明によれば、セラミック骨材粒子な無
機質結合材により結合させた多孔質の濾材てあって、該
濾材の平均気孔径か１００〜３００μｍ空隙率か２５〜
６０％であり、６５膳■ｌ１ｇ以下の圧力において１分
間当り２ ｇ／ｃｍ２〜２０ ｇ／ｃｍ２の金属溶湯か
通過し得ることを特徴とする金属溶湯用症材、か提供さ
れる。According to the present invention, there is provided a porous filter medium bound by an inorganic binder such as ceramic aggregate particles, and the average pore diameter of the filter medium is 100 to 300 μm, and the porosity is 25 to 300 μm.
60%, and is capable of passing 2 g/cm2 to 20 g/cm2 of molten metal per minute at a pressure of 65 g/lg or less.
さらに本発明によれば、セラミック骨材粒子を無機質結
合材により結合させた多孔質の濾材を用いて金属溶湯な
濾過する方法てあって、金属溶湯を平均気孔径か１００
〜３００ｇｍ、空隙率か２５〜６０％の濾材に、６５
＋ｉｕｓｔ１ｇ以下の圧力において１分間当り２ｇ／ｃ
■２〜２０ｇ／ｃ■２の濾過速度て通過させることを特
徴とする金属溶湯の濾過方Ｕ１、か提供される。Furthermore, according to the present invention, there is provided a method for filtering molten metal using a porous filter medium in which ceramic aggregate particles are bonded with an inorganic binder, the molten metal being filtered with an average pore diameter of 100.
~300gm, porosity of 25-60% filter media, 65
+iust2g/c per minute at pressures below 1g
(1) There is provided a method U1 for filtering molten metal, which is characterized in that the metal is passed through the metal at a filtration rate of 2 to 20 g/c.
［作用］
本発明においては、気孔径と空隙率を特定の範囲とした
濾材に、特定量の金属溶湯な通過させる濾過方〃、とそ
れに用いる濾材に特徴を有する。[Function] The present invention is characterized by a filtration method in which a specific amount of molten metal is passed through a filter medium having a pore diameter and a porosity within a specific range, and the filter medium used therefor.
このような特定な物性を有する濾材を用いることにより
、極めて性能の良い金属溶湯の濾過を達成することかて
きる。By using a filter medium having such specific physical properties, it is possible to achieve extremely high performance filtration of molten metal.
本発明て用いる骨材としては、金属溶湯と反応せず、適
切な粒１■のものを容易に入毛できるものであれば、特
にその種類を限定するものではないか、例えばアルミナ
質、炭化珪素質、窒化珪素質及び、ジルコニア質等のセ
ラミック骨材か上記の条件を満足するため好ましい。ま
た、用いる骨材粒子の平均粒子径は約０．３〜３．Ｏｌ
のものか濾材の上記平均気孔径範囲を得られ易いため好
ましい
また、骨材粒子としては下記て定義される形状指数か１
００〜１３０の範囲のものを用いることか好ましい。The type of aggregate used in the present invention is not particularly limited, as long as it does not react with the molten metal and can be easily coated with appropriate particles of 1 cm, for example, alumina, carbonized Ceramic aggregates such as silicon, silicon nitride, and zirconia are preferred because they satisfy the above conditions. Moreover, the average particle diameter of the aggregate particles used is about 0.3 to 3. Ol
It is preferable to obtain the above average pore diameter range of the filter medium, and as the aggregate particles, the shape index defined below or 1 is preferable.
It is preferable to use a number in the range of 00 to 130.
即ち、第１図に示す骨材の投影図において、その最大直
径なＭ、該最大直径Ｍに直交する径をＢ、投影面積なＡ
１円周長さをＰとしたとき、形状指数（ＳＦ）は次の式
で表される。That is, in the projected view of the aggregate shown in Figure 1, its maximum diameter is M, the diameter perpendicular to the maximum diameter M is B, and its projected area is A.
When the length of one circumference is P, the shape index (SF) is expressed by the following formula.
ＳＦ＝ （ＳＦ、 十ＳＦ２→−３Ｆ、）／３ここで、
ＳＦ、 ＝ （π／４） Ｘ （Ｍ” ／Ａ
） Ｘ ｌ ００ＳＦ２ ＝ （１／４ｗ）ｘ
（Ｐ２ ／Ａ）ｘｌｏｏｓ Ｆ ３ ＝ （Ｍ
／ Ｂ ） ｘ １００である。SF= (SF, 10SF2→-3F,)/3 where, SF, = (π/4) X (M”/A
) X l 00SF2 = (1/4w)x
(P2 /A)xloos F 3 = (M
/B) x 100.
因みに、真珠の形状指数は１００となる。Incidentally, the shape index of a pearl is 100.
このような形状指数の骨材粒−ｒを用いた場合、均一な
気孔径を有する多孔質体か得られるため、濾材の不純物
の捕集精度か向−［、シ、好ましい。When aggregate particles having such a shape index are used, a porous body having a uniform pore diameter can be obtained, which is preferable because it improves the accuracy of collecting impurities in the filter medium.
焦Ｊａ、質結合材としては、金属溶湯と反応しないもの
であれば特にその種類は限定されず、ガラス質結合材や
、Ｓ １０２ 、Ｂ２０：＋ 、Ａ！１２０：ｌ、Ｃａ
Ｏ，ＭｇＯ等を含む結合材を用いることかできるか、Ｓ
ｉＯ□を１０屯ｈｉ％より少ないｔ門１−含むホウ酸系
の結合材、例えばＢ２Ｏ３，Ａｎ、０゜ＭｇＯ＄からな
る無機質結合材か好ましい。The type of binder is not particularly limited as long as it does not react with the molten metal, such as glass binders, S102, B20:+, A! 120:l, Ca
Is it possible to use a binder containing O, MgO, etc.?
Preferred is a boric acid binder containing less than 10 tons of iO□, such as an inorganic binder made of B2O3, An, 0°MgO$.
８１０２含右ω−か少ないため、金属溶湯、特にアルミ
ニウム溶湯と５１０２との反応により生成した遊離シリ
コンの溶湯中への混入が少なくなるためである。なお、
通常骨材粒子１００重量部に対し無ａＩｊ１結合材を４
〜２０重量部配合して多孔質の濾材か作製される。This is because 8102 contains less ω-, so less free silicon generated by the reaction between molten metal, especially molten aluminum, and 5102 is mixed into the molten metal. In addition,
Normally, 4 parts of non-aIj1 binder per 100 parts by weight of aggregate particles
A porous filter medium is prepared by blending ~20 parts by weight.
」−４のように作製される濾材は、その平均気孔径かｌ
ＯＯ〜３００ ｐ、、 ｍ、空隙率が２５〜６０％の
物性を有することか必要である。濾材の平均気孔径か１
００ｇｍより小さいと、早期に目詰まりを起すほか、金
属溶湯が濾材に含浸し難く、一方平均気孔径か３００ｇ
、ｍを超えると微細な介在物を捕捉てきないという問題
かある。また濾材の空隙率か２５％より低いと、早期に
１１詰まりを起すほか、濾過に際しての圧力損失か大き
くなり過ぎ一方濾材の空隙率か６０％を超えると濾材の
強度か不戻し、濾過に際し°Ｃ破壊が生じるおそれかあ
る。”-4, the average pore diameter of the filter medium is 1.
It is necessary to have physical properties of OO~300 p, m, and porosity of 25~60%. The average pore diameter of the filter medium is 1
If the average pore size is less than 300 gm, clogging will occur early and the molten metal will be difficult to impregnate the filter medium.
, m, there is a problem that fine inclusions cannot be captured. Also, if the porosity of the filter medium is lower than 25%, clogging will occur early and the pressure loss during filtration will be too large, while if the porosity of the filter medium exceeds 60%, the strength of the filter medium will not return, and the filtration will not be possible. There is a risk of C-destruction.
さらに本発明の濾材は、６５ｍｍｔ１ｇ以下の圧力にお
いて１分間当り２ｇ／Ｃ１１２〜２０ ｇ／ｃｇｉ２の
濾過速度で金属溶湯な通過させ得る機能・特性を有する
ことか心霊である。金属溶湯の濾過速度か２ｇ／Ｃ１１
２より遅いと濾過操作に時間かかかり、それを回避しよ
うとすると多大な濾材面積か必要となる。濾過速度か２
０ ｇ／ｃｙａ２より速くなると、微細な介在物か捕捉
されずに濾材を通過するという問題か生しる。Furthermore, the filter medium of the present invention is unique in that it has the ability to pass molten metal at a filtration rate of 2 g/C112 to 20 g/cgi2 per minute at a pressure of 65 mmt1 g or less. Filtration rate of molten metal is 2g/C11
If it is slower than 2, the filtration operation will take a long time, and if you try to avoid this, a large area of filter media will be required. Filtration speed or 2
If it is faster than 0 g/cya2, a problem arises in that fine inclusions pass through the filter medium without being captured.
ここで、６５ ｍｍ１１ｇ以下の圧力とはアルミニウム
に換算すると３７０１鳳Ａ Ｊ−に相当するものであり
、濾材にアルミニウム溶湯等の金属溶湯を通湯させる場
合に通常使用される圧力条件を示している。従って６５
ｍｍ１１ｇを超えて金属溶湯を通湯させると、濾材に
過大な圧力か加わり、濾材の破損に至る可能性かあり、
好ましくない。Here, the pressure of 65 mm and 11 g or less corresponds to 3701 A J- when converted to aluminum, and indicates the pressure conditions normally used when molten metal such as molten aluminum is passed through the filter medium. . Therefore 65
If molten metal exceeds mm11g, excessive pressure will be applied to the filter medium, which may cause damage to the filter medium.
Undesirable.
なお、濾材の形状はチューフ状に限られず板状であって
もよい。また、濾材の厚さは通常１５〜３５ｍ■程度あ
ればよい。Note that the shape of the filter medium is not limited to the chew shape, but may be a plate shape. Further, the thickness of the filter medium should normally be about 15 to 35 m.
次に、上記の如き特性を有する濾材の製造方法の例を説
明する。Next, an example of a method for manufacturing a filter medium having the above characteristics will be explained.
アルミナ質、炭化珪素質、窒化珪Ｘ質などのセラミック
骨材粒子１００重礒部に対し、無機質結合材を４〜２０
重−１ｊ１−油添加し、カルボキシメチルセルロース（
ＣＭＣ）、リクニンスルホン酸カルシウム、デキストリ
ン等の有機バインターと適当ωの水分を加え、混練を行
なった後所定形状で、■１つ所定のＷ均気孔径および空
隙率を有する成形体に成形する。次いて、得られた成形
体を乾燥後通常１ｉｏｏ°Ｃ以上の温度にて焼成を行な
うことにより、未発ＩＪＩの濾材を得ることかできる。4 to 20 parts of an inorganic binder is added to 100 parts by weight of ceramic aggregate particles such as alumina, silicon carbide, and silicon nitride.
Heavy-1j1-oil was added and carboxymethyl cellulose (
CMC), calcium ricnin sulfonate, dextrin, and other organic binders and an appropriate amount of water are added, kneaded, and then molded into a molded body having a predetermined shape and uniform pore size and porosity. . Next, the obtained molded body is dried and then fired at a temperature of usually 100° C. or higher to obtain a filter medium for ungenerated IJI.
［実施例］
以ド、本発明を実施例に基づいて更に詳細に説明するか
、本発明はそれらの実施例に限られるものてはない。[Examples] Hereinafter, the present invention will be explained in more detail based on Examples, but the present invention is not limited to these Examples.
（実施例１）
表１、表２および表３に示すように、形状指数か１０５
．１２０．１４０．１６５であるアルミナ９９％以上の
各種粒１ｔｊの骨材１００重量部に対して、８２０３４
０重φ％、Ａ交、０３３０重量％、ＣａＯ１５重量％、
Ｍｇ０１０重量％、５ｉ０２５重是％からなる組成の結
合材を各駄添加しＣＭＣ″Ｓ−の４１機バインターと適
当量の水分とともに混合、混練を行なった。(Example 1) As shown in Tables 1, 2 and 3, the shape index was 105
．． 120.140.165 for 100 parts by weight of aggregate of 99% or more alumina of various grains 1tj, 82034
0 weight φ%, A cross, 0330 weight%, CaO 15 weight%,
A binder having a composition of 10% by weight of Mg0 and 25% by weight of 5i0 was added and mixed and kneaded with a CMC''S-41 binder and an appropriate amount of water.
次に、得られた混合物を用い、成形圧を変化させて各種
厚みの２００ｍ５Ｘ ２００ａｍの板に成形した。次い
て１０５°Ｃにて乾燥後、１３５０°Ｃて焼成した。Next, the obtained mixture was molded into plates of 200 m x 200 am of various thicknesses by varying the molding pressure. Then, after drying at 105°C, it was fired at 1350°C.
この焼成体について、Ｊ Ｉ ５Ｒ２２０５−７４の方
１人に従って見掛気孔（ｌを求め、この見掛気孔−トの
（ｔＩ′ｉをｒ／＝隙率とした。又、焼成体のモ均気孔
径は水銀圧入Ｖ、により求め、３点曲げにより抗折強１
バをＡ一定した。Regarding this fired body, the apparent pores (l) were determined according to one person in JI 5R2205-74, and the apparent pores (tI'i) were defined as r/=porosity. The pore diameter was determined by mercury intrusion V, and the bending strength was determined by 3-point bending.
I kept the bar constant at A.
次に、各種圧力差において、７５０°Ｃて保持したＪＩ
Ｓ１０５０のアルミニウム溶湯な、」−記で得られた焼
成体たる濾材に通過させ、総通過縫と濾過前後のホウ素
（Ｂ ） ｒａよりＢ除去率を求めた。測定結果および
評価結果を表１、表２および表３に示す。尚、表１〜３
中、ＮＯ，５，９，１１〜１３．１６．１９−′−２０
，２４〜２５．３２．４０，４４．５１〜５３及び５６
は本発明の条件範囲外のものである。Next, JI was held at 750°C under various pressure differences.
The molten aluminum of S1050 was passed through the filter medium, which is the fired body obtained in the above section, and the B removal rate was determined from the total passing stitch and the boron (B) ra before and after filtration. The measurement results and evaluation results are shown in Tables 1, 2 and 3. In addition, Tables 1 to 3
Medium, NO, 5, 9, 11-13.16.19-'-20
, 24-25, 32.40, 44.51-53 and 56
is outside the scope of the present invention.
（実施例２）
甘２４（ＪＩＳ Ｒ６００１）の炭化珪素質原料を骨
材とし、この骨材１ｏｏｔ’ｌ量部に対し、結合材とし
てＡ２゜０３２５重μ％、Ｂ２０−ｒ ３５重！ｄ％、
Ｓ １０２８重量％、Ｍｇ０１２重量％、Ｃａ０２０重
量％からなる組成物を１０重量部添加し、４１機バイン
ター、水分を加え、混練を行なった。(Example 2) Ama 24 (JIS R6001) silicon carbide raw material was used as the aggregate, and with respect to 1 oot'l part of this aggregate, the binding material was A2゜0325% by weight and B20-r 35% by weight! d%,
10 parts by weight of a composition consisting of 1028% by weight of S, 12% by weight of Mg, and 20% by weight of Ca were added, a 41 binder and water were added, and kneading was performed.
次に得られた混合物を用い、外［８０ｍｍφ、内１１５
０ｍｍφ、長さ３００ｍｍ＋のバイブな成形圧（充ＭＮ
’ｌ）を変化させなから成形し、１０５℃て乾燥後１４
００°Ｃにて焼成を行ない、バイブ状の濾材を作製した
。Next, using the obtained mixture, make an outer [80 mmφ, inner 115
0mmφ, length 300mm+ vibrating molding pressure (full MN
'l) was molded without changing, and dried at 105℃ for 14 hours.
Firing was performed at 00°C to produce a vibrator-shaped filter medium.
得られた濾材の平均気孔径、空隙率、抗折強度を測定す
るとともに、この吐材に１２００℃の溶鋼を通過させ、
鋼中の酸化物量の分析を行ない。The average pore diameter, porosity, and bending strength of the obtained filter medium were measured, and molten steel at 1200°C was passed through the discharge medium.
The amount of oxides in the steel was analyzed.
通過前後の変化率を求めた。その結果を表４に示す。尚
、表４中、ＮＯ，６〜１０は本発明の範囲外の場合を示
す。The rate of change before and after passing was calculated. The results are shown in Table 4. In Table 4, Nos. 6 to 10 indicate cases outside the scope of the present invention.
（実施例３）
形状指数か異なる焼結アルミナを骨材とし、そのモ均粒
子径を変化させ、これに８．０，６５重Ｉｊ％、Ａｕ、
０３１５重量％、Ｃａ０２０重Ｍ％からなるホウ酸系組
成物である結合材を表５に示すように変えて添加し、有
機バインダーおよび木とともに混練した。(Example 3) Sintered alumina with different shape indexes was used as aggregate, and the average particle diameter was changed, and 8.0.65% Ij%, Au,
A binder, which is a boric acid composition consisting of 0.315% by weight and 20% by weight of Ca, was added as shown in Table 5 and kneaded together with the organic binder and wood.
次に、得られた混合物を用い、成形圧を変化させて厚さ
２０■の２００謬ｓＸ ２００−鵬の板に成形した。次
いで１０５℃にて乾燥後１２５０°Ｃて焼成した。得ら
れた濾材の平均気孔径、空隙率、抗折強度を測定すると
ともに、この濾材に５３０〜５５０℃の亜鉛溶湯な通過
させて溶湯中の酸化物埴を分析し、その酸化物除去率を
求めた。その結果を表５に示す。尚、表５中、Ｎｏ、
２、Ｎ００６〜８は本発明の範囲外の場合を示す。Next, the obtained mixture was molded into a 200 mm x 200 mm plate with a thickness of 20 mm by varying the molding pressure. Next, it was dried at 105°C and fired at 1250°C. In addition to measuring the average pore diameter, porosity, and bending strength of the filter medium obtained, molten zinc at 530 to 550°C was passed through the filter medium to analyze oxide clay in the molten metal, and the oxide removal rate was determined. I asked for it. The results are shown in Table 5. In addition, in Table 5, No.
2, N006 to 8 indicate cases outside the scope of the present invention.
実施例１〜ＳからＩＪＪらかなように、気孔径と空隙４
にを特定の範囲とした濾材に、特定量の金属溶湯な通過
させるようにすると、良好な症過性能を達成てき、 −
力、本発明の範囲外の条件て諸過な行なうとその性能か
悪化することかわかる。From Examples 1 to S, the pore diameter and void 4 are as shown in IJJ.
By allowing a specific amount of molten metal to pass through a filter medium with a specific range of
It can be seen that if the product is subjected to various conditions outside the scope of the present invention, its performance may deteriorate.
［発明の効果］
以１．説明したように、本発明は、気孔径と空隙率を特
定の範囲とした濾材を用い、この濾材に特定量の金属溶
湯な通過させるようにしたのて、通湯性および介在物の
捕集性に優れ、しかも寿命か長いという、極めて性能の
良い金属溶湯の鑓過を達成することかできる。[Effects of the invention] Below 1. As explained above, the present invention uses a filter medium with a pore size and porosity within a specific range, and allows a specific amount of molten metal to pass through the filter medium, thereby improving the permeability and collection of inclusions. It is possible to achieve extremely high performance in filtration of molten metal, with excellent properties and long life.
第１１Ｍは骨材の形状指数を算出する際に用いる骨材の
投影説明図である。11M is a projected explanatory diagram of aggregate used when calculating the shape index of aggregate.
Claims (2)
せた多孔質の濾材であって、該濾材の平均気孔径が１０
０〜３００μｍ、空隙率が２５〜６０％であり、６５ｍ
ｍＨｇ以下の圧力において１分間当り２ｇ／ｃｍ＾２〜
２０ｇ／ｃｍ＾２の金属溶湯が通過し得ることを特徴と
する金属溶湯用濾材。(1) A porous filter medium made by bonding ceramic aggregate particles with an inorganic binder, the average pore diameter of the filter medium being 10
0~300μm, porosity is 25~60%, 65m
2g/cm^2~ per minute at pressures below mHg
A filter medium for molten metal, characterized in that a molten metal of 20 g/cm^2 can pass therethrough.
せた多孔質の濾材を用いて金属溶湯を濾過する方法であ
って、金属溶湯を平均気孔径が１００〜３００μｍ、空
隙率が２５〜６０％の濾材に、６５ｍｍＨｇ以下の圧力
において１分間当り２ｇ／ｃｍ＾２〜２０ｇ／ｃｍ＾２
の濾過速度で通過させることを特徴とする金属溶湯の濾
過方法。(2) A method of filtering molten metal using a porous filter medium in which ceramic aggregate particles are bonded with an inorganic binder, in which the molten metal is filtered with an average pore diameter of 100 to 300 μm and a porosity of 25 to 60%. filter media at a pressure of 2 g/cm^2 to 20 g/cm^2 per minute at a pressure of 65 mmHg or less.
A filtration method for molten metal, characterized in that the molten metal is passed through the molten metal at a filtration rate of .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2083247A JPH03281738A (en) | 1990-03-30 | 1990-03-30 | Filter material for metallic molten metal and method for filtering metallic molten metal by using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2083247A JPH03281738A (en) | 1990-03-30 | 1990-03-30 | Filter material for metallic molten metal and method for filtering metallic molten metal by using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03281738A true JPH03281738A (en) | 1991-12-12 |
Family
ID=13797002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2083247A Pending JPH03281738A (en) | 1990-03-30 | 1990-03-30 | Filter material for metallic molten metal and method for filtering metallic molten metal by using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03281738A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108569909A (en) * | 2017-02-23 | 2018-09-25 | 电化物产株式会社 | Filter and its manufacturing method for aluminum melt |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60230944A (en) * | 1984-05-01 | 1985-11-16 | Sukai Alum Kk | Treatment of molten aluminum |
| JPS6345684A (en) * | 1986-08-12 | 1988-02-26 | Toshiba Corp | Image compressor |
| JPS63216933A (en) * | 1987-03-04 | 1988-09-09 | Nippon Light Metal Co Ltd | Method for filtering molten aluminum |
-
1990
- 1990-03-30 JP JP2083247A patent/JPH03281738A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60230944A (en) * | 1984-05-01 | 1985-11-16 | Sukai Alum Kk | Treatment of molten aluminum |
| JPS6345684A (en) * | 1986-08-12 | 1988-02-26 | Toshiba Corp | Image compressor |
| JPS63216933A (en) * | 1987-03-04 | 1988-09-09 | Nippon Light Metal Co Ltd | Method for filtering molten aluminum |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108569909A (en) * | 2017-02-23 | 2018-09-25 | 电化物产株式会社 | Filter and its manufacturing method for aluminum melt |
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