JP4575761B2 - Refractory material for inner wall of furnace and waste combustion melting furnace - Google Patents
Refractory material for inner wall of furnace and waste combustion melting furnace Download PDFInfo
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- 239000011819 refractory material Substances 0.000 title claims description 27
- 239000002699 waste material Substances 0.000 title claims description 26
- 238000002844 melting Methods 0.000 title claims description 14
- 230000008018 melting Effects 0.000 title claims description 14
- 238000002485 combustion reaction Methods 0.000 title claims description 11
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 47
- 239000000395 magnesium oxide Substances 0.000 claims description 24
- 239000002893 slag Substances 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 13
- 239000003513 alkali Substances 0.000 claims description 12
- 150000004645 aluminates Chemical class 0.000 claims description 12
- 229910052596 spinel Inorganic materials 0.000 claims description 12
- 239000011029 spinel Substances 0.000 claims description 12
- 239000011230 binding agent Substances 0.000 claims description 7
- 229910052792 caesium Inorganic materials 0.000 claims description 7
- 229910052701 rubidium Inorganic materials 0.000 claims description 7
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical group [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 6
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical group [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 claims description 6
- 229910052700 potassium Inorganic materials 0.000 claims description 6
- 239000011591 potassium Substances 0.000 claims description 6
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical group [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 claims description 6
- 229910020068 MgAl Inorganic materials 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- VXYADVIJALMOEQ-UHFFFAOYSA-K tris(lactato)aluminium Chemical compound CC(O)C(=O)O[Al](OC(=O)C(C)O)OC(=O)C(C)O VXYADVIJALMOEQ-UHFFFAOYSA-K 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 description 16
- 230000007797 corrosion Effects 0.000 description 16
- 238000000197 pyrolysis Methods 0.000 description 12
- 239000000203 mixture Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- -1 electronic equipment Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000010849 combustible waste Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229920000592 inorganic polymer Polymers 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000011821 neutral refractory Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- KVOIJEARBNBHHP-UHFFFAOYSA-N potassium;oxido(oxo)alumane Chemical compound [K+].[O-][Al]=O KVOIJEARBNBHHP-UHFFFAOYSA-N 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002296 pyrolytic carbon Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Ceramic Products (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Gasification And Melting Of Waste (AREA)
Description
本発明は、炉内壁用耐火材に関するものであり、かつ、廃棄物（家庭やオフィスなどから出される都市ごみなどの一般廃棄物、廃プラスチック、カーシュレッダー・ダスト、電子機器、化粧品などの産業廃棄物など、可燃物を含むもの）を焼却処理して生ずる灰分を加熱して溶融スラグとする溶融炉であって、該炉内壁用耐火材を炉壁材として用いて内面を構成した廃棄物燃焼溶融炉に関する。 The present invention relates to a refractory material for an inner wall of a furnace, and industrial waste such as waste (general waste such as municipal waste from homes and offices, waste plastic, car shredder / dust, electronic equipment, cosmetics, etc.) Combustion waste that includes flammable slag by heating the ash generated by incineration of materials, including combustible materials, etc., and using the refractory material for the inner wall of the furnace as the furnace wall material Related to melting furnace.
従来、廃棄物は例えば廃棄物処理装置を用いて処理される。この廃棄物処理装置において、例えば、廃棄物は、熱分解反応器に搬送されて熱分解され、乾留ガスと不揮発性の熱分解残留物とになり、熱分解残留物が燃焼溶融炉に導入されて溶融され、スラグとして取り出されることになる。 Conventionally, waste is processed using, for example, a waste processing apparatus. In this waste treatment apparatus, for example, waste is transported to a pyrolysis reactor and pyrolyzed to become dry distillation gas and non-volatile pyrolysis residue, and the pyrolysis residue is introduced into the combustion melting furnace. It is melted and taken out as slag.
例えば、都市ごみ等の一般廃棄物や廃プラスチック等の可燃物を含む廃棄物の処理装置の一つとして、廃棄物を熱分解反応器に入れて低酸素雰囲気下で加熱して熱分解し、熱分解ガス（乾留ガス）と主として不揮発性成分からなる熱分解残留物とを生成し、この熱分解ガスと熱分解残留物とを排出装置において分離し、さらに熱分解残留物を不活性雰囲気下の冷却装置で冷却して後、分離装置に供給して熱分解カーボンを主体とする燃焼性成分と、例えば金属や陶器、砂利などの不燃焼性成分とに分離し、燃焼性成分を分際して粉体とし、この粉砕された燃焼性成分と前記した熱分解ガスとを燃焼溶融炉に導いて燃焼させ、生じた燃焼灰をその燃焼熱により加熱して溶融スラグとなし、この溶融スラグは耐火材で覆われた炉内面を伝って流下し、排出部から外部に排出して冷却固化させるようにした廃棄物処理装置が知られている（特公平６−５６２５３号公報）。 For example, as one of the waste treatment equipment containing combustibles such as municipal waste and combustible waste such as municipal waste, the waste is put in a pyrolysis reactor and heated in a low-oxygen atmosphere for thermal decomposition, A pyrolysis gas (dry distillation gas) and a pyrolysis residue mainly composed of non-volatile components are generated, and the pyrolysis gas and the pyrolysis residue are separated in a discharge device, and the pyrolysis residue is further removed under an inert atmosphere. After cooling with a cooling device, it is supplied to the separation device and separated into combustible components mainly composed of pyrolytic carbon and non-combustible components such as metal, ceramics, gravel, etc. The pulverized combustible component and the above-mentioned pyrolysis gas are led to a combustion melting furnace and burned, and the resulting combustion ash is heated by the combustion heat to form molten slag. Flows down the furnace inner surface covered with refractory material And so as to cool and solidify and discharged to the outside through the discharge unit waste disposal apparatus has been known (KOKOKU 6-56253 Patent Publication).
炉内壁用耐火材は鉄鋼、非鉄、セメント、ガラス、窯業など高温処理を必要とする工業の窯炉やボイラ、廃棄物焼却炉などに使用される。溶融スラグと接触する環境での使用においては、酸素分圧、アルカリ分圧などの気相側環境と共に溶融スラグの関与する過酷な高温腐食も考慮する必要がある。 Refractory materials for furnace inner walls are used in industrial kilns, boilers, waste incinerators, etc. that require high-temperature treatment such as steel, non-ferrous metals, cement, glass, and ceramics. In use in an environment in contact with molten slag, it is necessary to consider severe high temperature corrosion involving molten slag as well as the gas phase environment such as oxygen partial pressure and alkali partial pressure.
一般に、酸素分圧の高い場合においては酸化物系耐火物が使用される。空気で燃焼溶融する廃棄物処理での酸化物系耐火物の場合、酸化アルミニウムＡｌ２Ｏ３（アルミナ）を主体とする中性耐火物、または、アルミナと酸化マグネシウムＭｇＯ（マグネシア）との化合物マグネシアスピネルＭｇＡｌ２Ｏ４が選ばれることがある（特開２００４−２１７５１７号公報、特開２００２−１２８５７３号公報）。 In general, an oxide refractory is used when the oxygen partial pressure is high. In the case of oxide-based refractories in waste treatment that burns and melts in air, neutral refractories mainly composed of aluminum oxide Al 2 O 3 (alumina), or compound magnesia of alumina and magnesium oxide MgO (magnesia) Spinel MgAl 2 O 4 may be selected (Japanese Patent Laid-Open Nos. 2004-217517 and 2002-128573).
しかしながら溶融スラグは、塩基度が低く、また塩素やイオウなどの酸化性ガスが共存するため、アルミナやマグネシアなどの耐火材成分の溶解度が高いことに加え、これらの溶解成分のスラグ中の濃度増加に際し粘性が特段増加しない。従って、これらの耐火材のスラグ中への溶解が継続的に進行し、耐火材が減肉するので、耐火材の耐食性が悪化してしまう。
本発明の目的は、廃棄物を燃焼溶融してスラグ化する炉の壁に用いて炉内壁を構成した場合でも溶融スラグ中に溶解しにくくして、溶融スラグに対する耐食性を向上させた炉内壁用耐火材、および該耐火材を炉壁材として用いた廃棄物燃焼溶融炉を提供することにある。 An object of the present invention is for a furnace inner wall that is difficult to dissolve in molten slag and has improved corrosion resistance against molten slag even when the furnace inner wall is configured as a furnace wall for burning and melting waste to form slag. An object is to provide a refractory material and a waste combustion melting furnace using the refractory material as a furnace wall material.
本発明は、酸化アルミニウム又はマグネシアスピネルから構成される耐火主材９５〜９９．５重量％と結合材０．５〜５重量％を含む耐火材であって、アルミン酸アルカリ（ＲＡｌＯ２；Ｒ＝カリウム、ルビジウム、セシウム）を外掛けで５〜２５重量％含有すると共に、前記結合材がアルミナセメント又は乳酸アルミニウムである炉内壁用耐火材を要旨とする。ここで、マグネシアスピネルとは、ＭｇＡｌ２Ｏ４結晶を含み、ＭｇＯ成分を５．７〜３８．５重量％含み、かつＭｇＯ成分とＡｌ２Ｏ３成分の合計が９５重量％以上あるものをいう。 The present invention is a refractory material comprising 95 to 99.5 % by weight of a refractory main material composed of aluminum oxide or magnesia spinel and 0.5 to 5 % by weight of a binder, comprising alkali aluminate (RAlO 2 ; R = potassium, rubidium, cesium) in outer percentage with containing 5 to 25 wt%, the binder is summarized as alumina cement or aluminum lactate der Ru furnace inner wall refractory material. Here, the magnesia spinel includes MgAl 2 O 4 crystals, 5.7 to 38.5% by weight of MgO component, and 95% by weight or more of the total of MgO component and Al 2 O 3 component. .
また、本発明は、廃棄物を焼却処理して生ずる灰分を加熱して溶融スラグとする溶融炉であって、上記炉内壁用耐火材を炉壁材として用いた廃棄物燃焼溶融炉を要旨とする。 Further, the present invention is a melting furnace that heats the ash generated by incineration of waste to form molten slag, and a waste combustion melting furnace using the above-mentioned refractory material for the furnace inner wall as a furnace wall material. To do.
本発明では、アルミン酸アルカリ（ＲＡｌＯ２；Ｒ＝カリウム、ルビジウム、セシウム）を用いており、このアルミン酸アルカリではカリウム、ルビジウム、セシウムのようなイオン半径の大なるアルカリ元素Ｒを含んでいるため、Ｒ陽イオン−酸素間引力が小さく、溶融スラグ中への耐火材の溶解に際し系の塩基度を上昇させるため、アルミナが網目形成酸化物として挙動する割合が高くなり、アルミニウムイオンと酸素イオンが無機高分子鎖を形成する。そのため、溶融スラグの粘性が高まり、耐火材から溶融スラグへの物質移動速度が低下する。従って、耐火材の耐食性が向上することになる。 In the present invention, alkali aluminate (RAlO 2 ; R = potassium, rubidium, cesium) is used, and this alkali aluminate contains an alkali element R having a large ionic radius, such as potassium, rubidium, and cesium. , The R cation-oxygen attractive force is small and the basicity of the system is increased when the refractory material is dissolved in the molten slag, so that the proportion of alumina acting as a network-forming oxide increases, and aluminum ions and oxygen ions Inorganic polymer chains are formed. For this reason, the viscosity of the molten slag increases, and the mass transfer rate from the refractory material to the molten slag decreases. Therefore, the corrosion resistance of the refractory material is improved.
以上説明したように本発明によれば、アルミン酸アルカリ（ＲＡｌＯ２；Ｒ＝カリウム、ルビジウム、セシウム）を用いたために、廃棄物を燃焼溶融してスラグ化する炉の壁に用いて炉内壁を構成した場合でも溶融スラグ中に溶解しにくくしてスラグ粘性を高め、溶融スラグに対する耐食性を向上させた炉内壁用耐火材、および該耐火材を炉壁材として用いた廃棄物燃焼溶融炉を提供することが可能となる。 As described above, according to the present invention, since the alkali aluminate (RAlO 2 ; R = potassium, rubidium, cesium) is used, the inner wall of the furnace is used as the wall of the furnace for burning and melting waste to form slag. Providing a refractory material for the inner wall of a furnace that has improved slag viscosity and improved corrosion resistance against molten slag, and a waste combustion melting furnace using the refractory material as a furnace wall material It becomes possible to do.
本発明の炉内壁用耐火材は、酸化アルミニウムまたはマグネシアスピネルから構成される耐火性主材９５〜９９．５重量％と結合材０．５〜５重量％を含む耐火材であって、アルミン酸アルカリ（ＲＡｌＯ２；Ｒ＝カリウム、ルビジウム、セシウム）を外掛けで５〜２５重量％含有してなる。ここで、マグネシアスピネルとは、ＭｇＡｌ２Ｏ４結晶を含み、ＭｇＯ成分を５．７〜３８．５重量％含み、かつＭｇＯ成分とＡｌ２Ｏ３成分の合計が９５重量％以上あるものをいう。 The refractory material for an inner wall of the furnace of the present invention is a refractory material containing 95 to 99.5 % by weight of a refractory main material composed of aluminum oxide or magnesia spinel and 0.5 to 5 % by weight of a binder. Alkaline (RAlO 2 ; R = potassium, rubidium, cesium) is contained in an outer coating of 5 to 25% by weight. Here, the magnesia spinel includes MgAl 2 O 4 crystals, 5.7 to 38.5% by weight of MgO component, and 95% by weight or more of the total of MgO component and Al 2 O 3 component. .
マグネシアスピネルは、マグネシアとアルミナをＭｇＯ：２３〜６０％、
Ａｌ２Ｏ３：４０〜７７％の範囲になるように混合した原料混合物を焼成する方法、または、該原料混合物を電気溶融法により溶融し、冷却、粉砕した後、整粒する方法などで作製される。
Magnesia spinel is composed of magnesia and alumina MgO: 23-60%,
Al 2 O 3 : Prepared by a method of firing a raw material mixture mixed so as to be in the range of 40 to 77%, or a method of melting the raw material mixture by an electric melting method, cooling, pulverizing, and sizing Is done.
結合材としては、アルミナセメント又は乳酸アルミニウムを使用する。 As the binder, use the Alumina cement or aluminum lactate.
ここで、アルミン酸アルカリの含有量が５重量％より少ないと、溶融スラグの粘性向上の効果が発現しない。また、その含有量が２５重量％より多いと、炭酸ガスや水分の吸収による不安定性が現れ、実用性が消失する。 Here, when content of alkali aluminate is less than 5 weight%, the effect of the viscosity improvement of molten slag is not expressed. On the other hand, if the content is more than 25% by weight, instability due to absorption of carbon dioxide or moisture appears, and practicality is lost.
このようにしてなる本発明の炉内壁用耐火材を廃棄物燃焼溶融炉のような炉の炉壁材として用いる場合には、該耐火材の不定形物、または焼結物を用いて内壁面を構成すればよい。 When the refractory material for a furnace inner wall according to the present invention thus formed is used as a furnace wall material for a furnace such as a waste combustion melting furnace, the inner wall surface is formed by using an amorphous or sintered product of the refractory material. May be configured.
必要に応じて、分散剤又は硬化調整剤を加えてもよい。 You may add a dispersing agent or a hardening regulator as needed.
硬化調整剤には、硬化促進剤と硬化遅延剤とがあり、硬化促進剤としては、炭酸カリウム等が好ましく使用でき、硬化遅延剤としては、シュウ酸、ホウ酸等が好ましく使用できる。 The curing modifier includes a curing accelerator and a curing retardant, and potassium carbonate and the like can be preferably used as the curing accelerator, and oxalic acid and boric acid and the like can be preferably used as the curing retardant.
（実施例１）
母材をアルミナおよび／又はマグネシアスピネルとし、添加材としてアルミン酸カリウムを、また結合材として乳酸アルミニウムを用い、表１に示す組成１〜組成４のような配合で混合、成形、焼結し、丸棒状試料を作製した。これを、表３に示す組成の実機採取スラグに浸漬し腐食させる試験を行った。所定の温度・時間の浸漬の後、試料を切断し、実験前後の外径の変化から腐食量を求めた。その結果、表１に示すような腐食指標が得られた。ここで、腐食指標は、同一温度で焼結したアルミナにおける同一腐食条件での減肉量を１００とし、各試料の減肉量の相対値で示す。この指標が小さい程、耐食性が高い。
Example 1
The base material is alumina and / or magnesia spinel, potassium aluminate is used as an additive, and aluminum lactate is used as a binder, and mixed, molded, and sintered in a composition such as Composition 1 to Composition 4 shown in Table 1, A round bar sample was prepared. This was immersed in an actual machine-collected slag having the composition shown in Table 3 and subjected to a corrosion test. After immersion at a predetermined temperature and time, the sample was cut, and the amount of corrosion was determined from the change in outer diameter before and after the experiment. As a result, the corrosion index as shown in Table 1 was obtained. Here, the corrosion index is represented by a relative value of the thinning amount of each sample, assuming that the thinning amount in the same corrosion condition in alumina sintered at the same temperature is 100. The smaller this index, the higher the corrosion resistance.
（実施例２）
アルミン酸アルカリとして、アルミン酸ルビジウムを用いることを除いて実施例１と同様の試験を行った。その結果、表１の組成５の欄に記述したような耐食性能が得られた。この耐食性能は、表２に示すアルミナ単独や、マグネシアスピネル単独の場合より優れており、本アルミン酸材料が溶融スラグ粘性を高めたことに起因するものと解釈される。
(Example 2)
The same test as in Example 1 was performed except that rubidium aluminate was used as the alkali aluminate. As a result, corrosion resistance as described in the column of composition 5 in Table 1 was obtained. This corrosion resistance is superior to the cases of alumina alone and magnesia spinel alone shown in Table 2, and is interpreted to be caused by the fact that this aluminate material has increased melt slag viscosity.
（実施例３）
アルミン酸アルカリとして、アルミン酸セシウムを用いることを除いて実施例１と同様の試験を行った。その結果、表１の組成６の欄に記述したような耐食性能が得られた。この耐食性能は、表２に示すアルミナ単独や、マグネシアスピネル単独の場合より優れており、本アルミン酸材料が溶融スラグ粘性を高めたことに起因するものと解釈される。
(Example 3)
The same test as in Example 1 was performed except that cesium aluminate was used as the alkali aluminate. As a result, corrosion resistance as described in the column of composition 6 in Table 1 was obtained. This corrosion resistance is superior to the cases of alumina alone and magnesia spinel alone shown in Table 2, and is interpreted to be caused by the fact that this aluminate material has increased melt slag viscosity.
（比較例１）
母材をアルミナ又はマグネシアスピネルとし、アルミン酸アルカリを添加しないことを除いて実施例１と同様の試験を行った。その結果を表２に示す。
(Comparative Example 1)
The same test as in Example 1 was performed except that the base material was alumina or magnesia spinel and no alkali aluminate was added. The results are shown in Table 2.
表１、表２の比較から、アルミン酸アルカリを添加した試料において、優れた耐食性能が認められた。 From the comparison between Table 1 and Table 2, excellent corrosion resistance was observed in the samples to which alkali aluminate was added.
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| CN106892646A (en) * | 2017-02-08 | 2017-06-27 | 陈宇迪 | The MgO composites that a kind of cheap metal Al is combined |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS53120713A (en) * | 1977-03-31 | 1978-10-21 | Shinagawa Refractories Co | Nonnburnt refractory brick |
| JPS5727978A (en) * | 1980-07-23 | 1982-02-15 | Shinagawa Refractories Co | Basic refractory mortar |
| JPH10281657A (en) * | 1997-04-08 | 1998-10-23 | Nippon Steel Corp | Repair method for refractory lining of molten metal container |
| JP2002128573A (en) * | 2000-10-19 | 2002-05-09 | Asahi Glass Co Ltd | Castable refractory and furnace for fusing wastes |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53120713A (en) * | 1977-03-31 | 1978-10-21 | Shinagawa Refractories Co | Nonnburnt refractory brick |
| JPS5727978A (en) * | 1980-07-23 | 1982-02-15 | Shinagawa Refractories Co | Basic refractory mortar |
| JPH10281657A (en) * | 1997-04-08 | 1998-10-23 | Nippon Steel Corp | Repair method for refractory lining of molten metal container |
| JP2002128573A (en) * | 2000-10-19 | 2002-05-09 | Asahi Glass Co Ltd | Castable refractory and furnace for fusing wastes |
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