JPH04160052A - Magnesia-carbon refractory brick - Google Patents
Magnesia-carbon refractory brickInfo
- Publication number
- JPH04160052A JPH04160052A JP2286639A JP28663990A JPH04160052A JP H04160052 A JPH04160052 A JP H04160052A JP 2286639 A JP2286639 A JP 2286639A JP 28663990 A JP28663990 A JP 28663990A JP H04160052 A JPH04160052 A JP H04160052A
- Authority
- JP
- Japan
- Prior art keywords
- magnesia
- carbon
- refractory material
- refractory brick
- calcium carbonate
- 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
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 45
- 239000011449 brick Substances 0.000 title claims description 36
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 64
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 52
- 239000011819 refractory material Substances 0.000 claims abstract description 34
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052751 metal Inorganic materials 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 27
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 26
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 22
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 22
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 7
- 150000002739 metals Chemical class 0.000 claims description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 5
- 239000011777 magnesium Substances 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 2
- 229910001182 Mo alloy Inorganic materials 0.000 claims description 2
- 229910000676 Si alloy Inorganic materials 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- VYZAMTAEIAYCRO-YPZZEJLDSA-N chromium-50 Chemical compound [50Cr] VYZAMTAEIAYCRO-YPZZEJLDSA-N 0.000 claims 1
- 235000012245 magnesium oxide Nutrition 0.000 abstract description 28
- 230000007797 corrosion Effects 0.000 abstract description 18
- 238000005260 corrosion Methods 0.000 abstract description 18
- 239000002893 slag Substances 0.000 abstract description 16
- 239000011230 binding agent Substances 0.000 abstract description 2
- 229910002804 graphite Inorganic materials 0.000 abstract description 2
- 239000010439 graphite Substances 0.000 abstract description 2
- 235000010216 calcium carbonate Nutrition 0.000 abstract 3
- 235000014380 magnesium carbonate Nutrition 0.000 abstract 3
- 230000007423 decrease Effects 0.000 description 11
- 238000002156 mixing Methods 0.000 description 9
- 239000000292 calcium oxide Substances 0.000 description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 7
- 238000004901 spalling Methods 0.000 description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 6
- 235000011941 Tilia x europaea Nutrition 0.000 description 6
- 230000029087 digestion Effects 0.000 description 6
- 239000004571 lime Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000010459 dolomite Substances 0.000 description 5
- 229910000514 dolomite Inorganic materials 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- -1 aluminum metals Chemical class 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000003518 caustics Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 241000287486 Spheniscidae Species 0.000 description 1
- ATRMIFNAYHCLJR-UHFFFAOYSA-N [O].CCC Chemical compound [O].CCC ATRMIFNAYHCLJR-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 235000019621 digestibility Nutrition 0.000 description 1
- 230000001079 digestive effect Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は特に低塩基度スラグに対しても耐食性に優れた
マグネシア・カーボン質耐火煉瓦に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a magnesia-carbon refractory brick that has excellent corrosion resistance, especially against low basicity slag.
（従来の技術）
マグネシア・カーボン質耐火煉瓦は主成分であるマグネ
シアの融点が約２８３０°Ｃと高いため耐熱性に優れ、
また塩基性スラグと反応し難く、カーボンが耐熱スポー
リング性、濡れ性に優れることから製鉄用耐火物として
多用されている。また熱間強度の向上およびカーボンの
酸化防止等を目的として金属粉末が添加され効果をあげ
ている。しかし、従来のマグネシア・カーボン質耐火煉
瓦は高塩基度スラグに対して優れた耐食性を示すがスラ
グの塩基度の低下に伴い耐食性が低下する。特に塩基性
酸化物であるＣａＯと酸性酸化物であるＳｉＯ□との比
（以下Ｃ／Ｓ比と称する。）が２未満のスラグにその傾
向が著しい。(Prior art) Magnesia-carbon refractory bricks have excellent heat resistance because the main component, magnesia, has a high melting point of approximately 2830°C.
In addition, it is difficult to react with basic slag, and carbon has excellent heat spalling resistance and wettability, so it is often used as a refractory for iron manufacturing. Metal powders have also been added to improve hot strength and prevent carbon oxidation, which has been effective. However, although conventional magnesia-carbon refractory bricks exhibit excellent corrosion resistance against high basicity slag, their corrosion resistance decreases as the basicity of the slag decreases. This tendency is particularly noticeable in slag in which the ratio of CaO, which is a basic oxide, to SiO□, which is an acidic oxide (hereinafter referred to as the C/S ratio) is less than 2.
そこで、この耐食性の低下を防ぐ手段として、特開昭６
３−２４８７６５号公報においては、マグネシア系耐火
材およびカーボン系耐火材にドロマイトクリンカ−また
は石灰クリンカーを添加したＭｇＯ−Ｃａ０−Ｃ耐火煉
瓦が提案されている。このＭｇＯ−Ｃａ０−Ｃ耐火煉瓦
では低塩基度スラグに対して、耐火煉瓦の表層部に存在
するＣａＯが溶出し、耐火煉瓦の稼動面近傍のスラグの
塩基度を上昇させてスラグの浸透を防止するものである
。Therefore, as a means to prevent this deterioration of corrosion resistance, JP-A-6
No. 3-248765 proposes an MgO--CaO--C refractory brick in which dolomite clinker or lime clinker is added to a magnesia-based refractory material and a carbon-based refractory material. In this MgO-Ca0-C refractory brick, CaO present in the surface layer of the refractory dissolves against the low basicity slag, increasing the basicity of the slag near the working surface of the refractory and preventing slag penetration. It is something to do.
（発明が解決しようとする課題）
しかしながら、前記ドロマイトクリンカ−および石灰ク
リンカーは高価であるとともに、消化され易いという問
題点があった。とりわけ石灰クリンカーではこの性質が
顕著で、煉瓦組織劣化による耐食性の低下が著しい。(Problems to be Solved by the Invention) However, the dolomite clinker and lime clinker have problems in that they are expensive and easily digested. This property is particularly noticeable in lime clinker, and corrosion resistance is significantly reduced due to deterioration of the brick structure.
したがって、本発明は前記問題点を解決し、耐消化性に
優れる−とともに低塩基度スラグに対しても耐食性に優
れるマグネシア・カーボン質耐火煉瓦の提供を目的とす
る。Therefore, it is an object of the present invention to solve the above-mentioned problems and provide a magnesia-carbon refractory brick that has excellent digestion resistance and also has excellent corrosion resistance against low basicity slag.
（課題を解決するための手段）
本発明は前記問題点を解決するために、マグネシア・カ
ーボン質煉瓦において、
マグネシア系耐火材、カーボン系耐火材並びに炭酸カル
シウムおよび／または炭酸マグネシウムをその原料の主
たる配合組成として、
これら主たる配合組成の合量を１００％１ｔ％として、
マグネシア系耐火材とカーボン系耐火材の合量７０〜９
９ｗｔ％並びに粒径ｌ間板下の炭酸カルシウムおよび／
または炭酸マグネシウム１〜３０ｗｔ％が含有されると
ともに、
前記炭酸カルシウムおよび／または炭酸マグネシウムの
合量１００ｗ ｔ％に対し外掛けで１０〜９０ｗｔ％の
金属粉末を含有することを特徴とするマグネシア・カー
ボン質耐火煉瓦を提案するものである。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a magnesia-carbon brick using a magnesia-based refractory material, a carbon-based refractory material, and calcium carbonate and/or magnesium carbonate as the main raw materials. As a blending composition, the total amount of these main blending compositions is 100% 1t%,
Total amount of magnesia-based refractory material and carbon-based refractory material: 70 to 9
9 wt% and particle size l of calcium carbonate and/or
Or magnesia carbon, which contains 1 to 30 wt% of magnesium carbonate, and also contains 10 to 90 wt% of metal powder based on the total amount of 100 wt% of the calcium carbonate and/or magnesium carbonate. We are proposing high-quality refractory bricks.
本発明に用いるマグネシア系耐火材は例えば電融マグネ
シアクリンカ−１焼結マグネシア、天然産マグネシア等
があり、カーボン系耐火材としては例えば天然黒鉛、人
工黒鉛等があり、特に鱗状黒鉛が好ましい。マグネシア
系耐火材およびカーボン系耐火材の合量の配合量は、配
合組成の合量を１００ｗｔ％に対し、７０ｗ ｔ％未満
では耐火物としての本来の機能が低下、し、９９ｗｔ％
を超えると炭酸カルシウムおよび／または炭酸マグネシ
ウムの配合量が減少することとなり低塩基度スラグに対
する耐食性が認められない。Magnesia-based refractory materials used in the present invention include, for example, sintered magnesia of fused magnesia clinker 1, naturally produced magnesia, etc. Carbon-based refractory materials include, for example, natural graphite, artificial graphite, etc., with scale graphite being particularly preferred. The total blending amount of the magnesia-based refractory material and the carbon-based refractory material is 99 wt%, as the original function as a refractory will deteriorate if it is less than 70 wt%.
If it exceeds this, the amount of calcium carbonate and/or magnesium carbonate will decrease, and corrosion resistance against low basicity slag will not be recognized.
また、本発明に用いられる炭酸カルシウムおよび炭酸マ
グネシウムは粒径１ｍｍ以下が好ましく、粒径１ｍを超
えると加熱によって形成される気孔が大きくなり、また
気孔率が高くなって耐消化性が低下する。また炭酸カル
シウムおよび／または炭酸マグネシウムの配合量は配合
組成の含量１００１％に対し、１ｗｔ％未満では低塩基
度スラグに対する耐食性が認められず、３０ｗ ｔ％を
超えると耐消化性が低下するとともに１０００’Ｃ以上
に加熱すると多孔質化現象が起こり耐食性が低下する。Further, the particle size of the calcium carbonate and magnesium carbonate used in the present invention is preferably 1 mm or less; if the particle size exceeds 1 m, the pores formed by heating become large and the porosity becomes high, resulting in a decrease in digestion resistance. In addition, if the blending amount of calcium carbonate and/or magnesium carbonate is less than 1 wt% with respect to the content of 1001% in the blended composition, corrosion resistance against low basicity slag will not be observed, and if it exceeds 30 wt%, digestibility will decrease and When heated above 'C, a porosity phenomenon occurs and the corrosion resistance decreases.
前記マグネシア系耐火材およびカーボン系耐火材はこれ
らの合量を１００ｗｔ％として、その配合割合はマグネ
シア系耐火材５５〜９７ｗｔ％、カーボン系耐火材３〜
４５％ ｔ％が好ましい。マグネシア系耐火材は５５ｗ
ｔ％未満では耐火物として発現されるマグネシア本来の
耐食性が充分得られず、９５ｗｔ％を超えると耐火煉瓦
の熱的弾性が減少し耐熱スポーリング性が低下する。ま
たカーボン系耐火材は３ｗｔ％未満ではスラグに濡れ難
く耐火煉瓦の耐スポーリング性が低下し急熱急冷による
亀裂を惹起し、４５ｗｔ％を超えるとカーボン量が過多
となりカーボンが酸化され、カーボン中のシリカ成分も
増大し侵食性も低下する。The total amount of the magnesia-based refractory material and carbon-based refractory material is 100 wt%, and the blending ratio is 55-97 wt% of the magnesia-based refractory material and 3-97 wt% of the carbon-based refractory material.
45%t% is preferred. Magnesia-based refractory material is 55w
If it is less than t%, the corrosion resistance inherent to magnesia, which is expressed as a refractory, will not be sufficiently obtained, and if it exceeds 95wt%, the thermal elasticity of the refractory brick will decrease and the heat spalling resistance will decrease. In addition, if the carbon-based refractory material is less than 3 wt%, it is difficult to wet with slag, reducing the spalling resistance of the refractory brick and causing cracks due to rapid heating and cooling. The silica content also increases and the erodibility decreases.
前記金属粉末はシリコン、アルミニウム、マグネシウム
、モリブデン、クロムの各金属うちから選ばれた１種ま
たは２種以上の組合せまたはこれらの各金属の合金であ
ることが好ましく、添加量は前記炭酸カルシウムおよび
／または炭酸マグネシウムの合量１００ｗｔ％に対して
それぞれ外掛けで次に述べる量が好ましい。The metal powder is preferably one or a combination of two or more metals selected from silicon, aluminum, magnesium, molybdenum, and chromium, or an alloy of each of these metals, and the amount added is the same as the calcium carbonate and/or chromium. Alternatively, it is preferable to use the amounts described below in terms of the total amount of magnesium carbonate of 100 wt%.
シリコンおよび／またはアルミニウム金属、これら金属
および／またはシリコン合金および／またはアルミニウ
ム合金ではこれらの合量でｌθ〜５０ｗｔ％、マグネシ
ウムおよび／またはモリブデン金属、これら金属および
／またはマグネシウム合金および／またはモリブデン合
金ではこれらの合量で３０〜７０ｗ ｔ％、クロムでは
５０〜９０ｗｔ％を含有することが好ましい、これらの
金属粉末はカーボンよりも酸素親和力が大きくカーボン
の酸化を防止するとともに、炭酸カルシウムおよび／ま
たは炭酸マグネシウムの分解によって生じた酸化カルシ
ウムおよび／または酸化マグネシウムの周囲で反応し被
膜を形成する。これらの金属粉末の添加量が前記添加量
の下限値未満であれば金属が捕獲する酸素量が少なくあ
るいは気孔を封鎖するに必要な金属ガス量が少ないため
にカーボンの酸化防止が不十分となるとともに、前記被
膜の形成が不十分となる。また上限値を超えると耐火煉
瓦の弾性が低下し、熱スポーリングによる亀裂の発生を
惹起する。For silicon and/or aluminum metals, these metals and/or silicon alloys and/or aluminum alloys, the total amount of these is lθ ~ 50 wt%, for magnesium and/or molybdenum metals, these metals and/or magnesium alloys and/or molybdenum alloys. It is preferable that the total amount of these metal powders is 30 to 70 wt%, and 50 to 90 wt% of chromium.These metal powders have a higher oxygen affinity than carbon and prevent carbon oxidation, and also contain calcium carbonate and/or carbonate. It reacts around calcium oxide and/or magnesium oxide produced by decomposition of magnesium to form a film. If the amount of these metal powders added is less than the lower limit of the amount added, carbon oxidation prevention will be insufficient because the amount of oxygen captured by the metal is small or the amount of metal gas required to seal the pores is small. At the same time, the formation of the film becomes insufficient. Moreover, when the upper limit is exceeded, the elasticity of the refractory brick decreases, causing cracks to occur due to thermal spalling.
（作用および発明の効果）
主たる耐火原料であるマグネシア系耐火材およびカーボ
ン系耐火材に配合される炭酸カルシウムまたは炭酸マグ
ネシウムは、高温度域において次に示されるように分解
する。(Actions and Effects of the Invention) Calcium carbonate or magnesium carbonate, which is blended into the magnesia-based refractory material and the carbon-based refractory material, which are the main refractory raw materials, decomposes in the high temperature range as shown below.
この加熱によって生成した酸化カルシウムＣａＯまたは
酸化マグネシウムＭｇＯは空気中の水薫気と水和し易い
傾向がある。しかし、ガス化された金属がＣａＯまたは
ＭｇＯの周囲で反応して被膜が形成され、この被膜がＣ
ａＯまたはＭｇＯと湿気を含んだ空気との接触を阻止し
、水和を防止することができる。また金属粉末が前述の
分解によって生じたＣＯ□と反応して金属酸化物を生成
して体積が増大し、この金属酸化物が煉瓦内に侵入する
湿気を含んだ空気の通路を封鎖して煉瓦の消化反応を防
止する。Calcium oxide CaO or magnesium oxide MgO produced by this heating tends to be easily hydrated with water fumes in the air. However, the gasified metal reacts around CaO or MgO to form a film, and this film
It is possible to prevent aO or MgO from coming into contact with humid air and prevent hydration. In addition, the metal powder reacts with the CO□ produced by the decomposition described above to produce metal oxides, which increase in volume, and these metal oxides block the passage of moisture-containing air that enters the bricks. prevents digestive reactions.
さらに、金属粉末を添加することによってカーボンの酸
化を防ぎ、スラグ濡れ性に優れたものとするカーボンの
添加効果を助長する。Furthermore, the addition of metal powder prevents oxidation of carbon and promotes the effect of adding carbon, which improves slag wettability.
またマグネシア系耐火材およびカーボン系耐火材に炭酸
カルシウムを配合することによって、煉瓦が低塩基度ス
ラグに接触した場合、接触面近傍では炭酸カルシウムの
分解によって生じたＣａＯによってスラグのＣ／Ｓ比が
上昇し粘性が増大する。In addition, by blending calcium carbonate with magnesia-based refractory materials and carbon-based refractory materials, when bricks come into contact with low basicity slag, the C/S ratio of the slag increases near the contact surface due to CaO generated by decomposition of calcium carbonate. rises and increases viscosity.
したがって、侵食面に存在する煉瓦の主たる酸化物であ
るペリクレース粒子の流出を阻止し、耐食性を高める。Therefore, the outflow of periclase particles, which are the main oxides of bricks present on the corroded surface, is prevented and corrosion resistance is improved.
またさらに、炭酸カルシウムおよび炭酸マグネシウムは
石灰クリンカーまたはドロマイトクリンカ−よりも安価
であり、従来のマグネシア・カーボン質耐火煉瓦よりも
経済性に優れる。Furthermore, calcium carbonate and magnesium carbonate are less expensive than lime clinker or dolomite clinker, making them more economical than conventional magnesia carbon refractory bricks.
（実施例） 次に本発明の具体的な実施例を説明する。(Example) Next, specific examples of the present invention will be described.
目的のマグネシア・カーボン質耐火煉瓦を得るために、
本発明において用いられるマグネシア系耐火材はＭｇＯ
成分が９９ｗｔ％以上の高純度のものを用いることが望
ましい。不純物が多いと低融物を生成し易くなり得られ
る耐火煉瓦の耐食性の低下を招く。カーボン系耐火材は
固定炭素含有量８５ｗｔ％以上が好ましく、８５ｗｔ％
未満であると不純物が多いために骨材の周囲に間隙が生
じ耐火煉瓦としての物性が低下する。また、炭酸カルシ
ウム、炭酸マグネシウム、金属粉末も高純度のものが好
ましい。In order to obtain the desired magnesia-carbon refractory brick,
The magnesia-based refractory material used in the present invention is MgO
It is desirable to use a highly pure material containing 99 wt% or more of components. If there are many impurities, low-melting substances are likely to be produced, leading to a decrease in the corrosion resistance of the resulting refractory brick. The carbon-based refractory material preferably has a fixed carbon content of 85 wt% or more, and 85 wt%
If it is less than 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 by the amount of. Furthermore, calcium carbonate, magnesium carbonate, and metal powder are preferably of high purity.
本発明のマグネシア・カーボン質耐火煉瓦（以下本発明
品と称する）の作製にあたり、第１表に示される配合割
合で各原料を配合し、結合剤としてフェノール樹脂を混
合し、フレットミキサーで混練しフリクシジンプレス機
により並形形状に成形した。得られた成形体を１５０°
Ｃで２４時間乾燥し耐火煉瓦を得た。 ′
また比較例として、炭酸カルシウムまたは炭酸゛マグネ
シウムを含まない、また配合割合が本発明から逸脱する
マグネシア・カーボン質耐火煉瓦（以下比較品と称する
）、従来例として石灰タリンカーまたはドロマイトクリ
ンカ−を含有するマグネシア・カーボン質耐火煉瓦（以
下従来品と称する）を本発明品と同様の方法で作製し、
第２表にそれらの配合割合を示した。In producing the magnesia-carbon refractory brick of the present invention (hereinafter referred to as the product of the present invention), each raw material is blended in the proportions shown in Table 1, a phenol resin is mixed as a binder, and the mixture is kneaded with a fret mixer. It was molded into a regular shape using a Frixigin press machine. The obtained molded body was rotated at 150°
It was dried at C for 24 hours to obtain a refractory brick. ' In addition, as a comparative example, a magnesia carbon refractory brick that does not contain calcium carbonate or magnesium carbonate and whose blending ratio deviates from that of the present invention (hereinafter referred to as a comparative product), and a conventional example that contains lime talinker or dolomite clinker. A magnesia-carbon refractory brick (hereinafter referred to as conventional product) was produced in the same manner as the product of the present invention,
Table 2 shows their blending ratios.
なお第１表および第２表中、金属槽で示されている配合
割合のうち〈〉内は炭酸カルシウムおよび炭酸マグネシ
ウムの合量に対して外掛けの添加量であることを表し、
（）内は金属およびフェノール樹脂を除く全配合量に対
しての外掛けの添加量を表している。In addition, in Tables 1 and 2, of the compounding ratios shown in the metal tank, the numbers in <> indicate the amount added in proportion to the total amount of calcium carbonate and magnesium carbonate.
The numbers in parentheses indicate the amount added to the total amount excluding metals and phenolic resin.
これらのマグネシア・カーボン質耐火煉瓦について、次
に記述する方法によって耐消化性、耐食性、気孔率およ
び耐久ポーリング性を測定しその結果を第３表および第
４表に示した。The digestion resistance, corrosion resistance, porosity, and durable poling property of these magnesia-carbon refractory bricks were measured by the methods described below, and the results are shown in Tables 3 and 4.
〈耐消化性〉
笠形形状の耐火煉瓦から４０Ｘ４０Ｘ１１４ ｍのテス
トピースを切り出し、コークスプリーズ中で８時間、（
１）常温、（２） ５００°Ｃに加熱、（３）１４００
°Ｃに加熱した後室温で放冷した結果、亀裂の程度を目
視によって次のように相対的に評価した。<Extinguishing resistance> A test piece measuring 40 x 40 x 114 m was cut out of a refractory brick in the shape of a hat, and heated in coke spray for 8 hours (
1) Room temperature, (2) Heated to 500°C, (3) 1400°C
After heating to °C and cooling at room temperature, the degree of cracking was visually observed and relatively evaluated as follows.
◎：亀裂なし
Ｏ：微亀裂あり
△：大亀裂あり
×：崩壊
〈耐食性〉
笠形形状の耐火煉瓦から台形柱状テストピースを切り出
してドラム内に内張すし、ドラムを回転させながらドラ
ムの軸方向に酸素−プロパン炎を吹き込み１６００°Ｃ
に加熱した。ドラムを加熱したまま侵食剤としてＳｉｎ
ｇ ４０％、ＡＩ！ｏ３１８％、Ｆｅ、０３２％、Ｃａ
Ｏ４０％からなるスラグ（Ｃ／Ｓ比１）を投入して侵食
を行わせた。侵食剤を排出し強制空冷を２０分間行った
。この操作を侵食剤を３０分毎に取り替え６回繰り返し
た後内張すしていた煉瓦材料を切断し溶損量を鵬単位で
測定し従来品Ｎｏ、１８の溶損量を１００％として損耗
比を百分率で示した。この損耗比が小さいほど耐食性に
優れる。◎: No cracks O: Slight cracks △: Large cracks ×: Collapse (corrosion resistance) A trapezoidal columnar test piece is cut out from a shade-shaped refractory brick, lined inside the drum, and then rotated in the axial direction of the drum. Blow oxygen-propane flame to 1600°C
heated to. Sin is used as an erosion agent while the drum is heated.
g 40%, AI! o318%, Fe, 032%, Ca
Slag consisting of 40% O (C/S ratio 1) was introduced to cause erosion. The corrosive agent was discharged and forced air cooling was performed for 20 minutes. After repeating this operation six times by replacing the corrosive agent every 30 minutes, the brick material used as the lining was cut and the amount of erosion was measured in units of penguins.The amount of erosion of conventional product No. 18 was taken as 100% and the wear ratio is expressed as a percentage. The smaller the wear ratio, the better the corrosion resistance.
〈気孔率〉
コークスプリーズ中で１４００°Ｃ１８時間加熱後、Ａ
Ｓ Ｔ Ｍ 、、 Ｃ８３０−７９に準じて気孔率を
測定した。<Porosity> After heating at 1400°C for 18 hours in Coke Please, A
The porosity was measured according to STM, C830-79.
〈耐スポーリング性〉
笠形形状の耐火煉瓦から４０Ｘ４０Ｘ１１４閣のテスト
ピースを切り出し、１６００℃の溶銑中に４０ Ｘ ４
０ｍ面を深さ４０騙まで浸漬し５分間保持後取り出し３
０分間室温で放冷する。このサイクルを２０回繰り返し
て亀裂の程度を目視によって次のように相対的に評価し
た。<Spalling resistance> A 40 x 40 x 114 test piece was cut from a shade-shaped refractory brick and placed in molten iron at 1600°C.
Immerse the 0m side to a depth of 40 degrees, hold for 5 minutes, then take out 3
Leave to cool at room temperature for 0 minutes. This cycle was repeated 20 times, and the degree of cracking was visually observed and relatively evaluated as follows.
◎：亀裂なし
○：微亀裂あり
×：大亀裂あり
第３表および第４表から明らかになように、炭酸カルシ
ウムおよび／または炭酸マグネシウムを配合した本発明
品ｌ１４＋ｌＬ１〜１ＩｋＬ１７においては、石灰クリ
ンカーまたはドロマイトクリンカ−を配合した従来品Ｎ
ａ２８または胤２９に較べて、常温から高温の広範囲に
亙って耐消化性が顕著に向上した。また本発明品は炭酸
カルシウムおよび／または炭酸マグネシウムを配合しな
い比較品Ｎａ１８に較べて耐消化性、耐食性および耐ス
ポーリング性において総合的に優れている。またさらに
、本発明品は炭酸カルシウムの粒径および配合量が本発
明の範囲から逸脱した比較品Ｎａ１９〜胤２７に較べて
、耐消化性、耐食性、気孔率および耐スポーリング性の
全てに亙って優れている。◎: No cracks ○: Slight cracks ×: Large cracks As is clear from Tables 3 and 4, in the products 114+1L1 to 1IkL17 of the present invention containing calcium carbonate and/or magnesium carbonate, lime clinker or Conventional product N containing dolomite clinker
Compared to A28 or Seed 29, the digestion resistance was significantly improved over a wide range from room temperature to high temperature. Furthermore, the product of the present invention is comprehensively superior in digestion resistance, corrosion resistance, and spalling resistance compared to comparative product Na18 which does not contain calcium carbonate and/or magnesium carbonate. Furthermore, the products of the present invention are better in all aspects of digestion resistance, corrosion resistance, porosity, and spalling resistance than comparative products Na19 to Na27 in which the particle size and blending amount of calcium carbonate deviate from the range of the present invention. That's excellent.
出願人 ハリマセラミック株式会社Applicant Harima Ceramic Co., Ltd.
Claims (1)
シア系耐火材、カーボン系耐火材並びに炭酸カルシウム
および／または炭酸マグネシウムをその原料の主たる配
合組成として、 これらの主たる配合組成の合量を１００ｗｔ％として、
マグネシア系耐火材とカーボン系耐火材の合量７０〜９
９ｗｔ％並びに粒径１ｍｍ以下の炭酸カルシウムおよび
／または炭酸マグネシウム１〜３０ｗｔ％が含有される
とともに、 前記炭酸カルシウムおよび／または炭酸マグネシウムの
合量１００ｗｔ％に対して外掛けで１０〜９０ｗｔ％の
金属粉末が含有される ことを特徴とするマグネシア・カーボン質耐火煉瓦。 ２ 前記マグネシア系耐火材とカーボン耐火材はこれら
の合量を１００ｗｔ％として、マグネシア系耐火材５５
〜９７ｗｔ％、カーボン系耐火材３〜４５ｗｔ％である
ことを特徴とする請求項１に記載のマグネシア・カーボ
ン質耐火煉瓦。 ３ 前記金属粉末はシリコン、アルミニウム、マグネシ
ウム、モリブデンおよびクロムの各金属のうちから選ば
れた１種または２種以上の組合せまたはこれらの各金属
の合金であることを特徴とする請求項１または２に記載
のマグネシア・カーボン質耐火煉瓦。 ４ 前記炭酸カルシウムおよび／または炭酸マグネシウ
ムの合量１００ｗｔ％に対して外掛けで、シリコンおよ
び／またはアルミニウム金属、これら金属および／また
はシリコン合金および／またはアルミニウム合金１０〜
５０ｗｔ％が含有されるものであることを特徴とする請
求項１乃至３のうちのいずれかに記載のマグネシア・カ
ーボン質耐火煉瓦。 ５ 前記炭酸カルシウムおよび／または炭酸マグネシウ
ムの合量１００ｗｔ％に対して外掛けで、マグネシウム
および／またはモリブデン金属、これらの金属および／
またはマグネシウム合金および／またはモリブデン合金
３０〜７０ｗｔ％が含有されたものであることを特徴と
する請求項１乃至４のうちのいずれかに記載のマグネシ
ア・カーボン質耐火煉瓦。 ６ 前記炭酸カルシウムおよび／または炭酸マグネシウ
ムの合量１００ｗｔ％に対して外掛けで、クロム５０〜
９０ｗｔ％が含有されたものであることを特徴とする請
求項１乃至５のうちのいずれかに記載のマグネシア・カ
ーボン質耐火煉瓦。[Scope of Claims] 1. In a magnesia-carbon refractory brick, magnesia-based refractory material, carbon-based refractory material, and calcium carbonate and/or magnesium carbonate are the main compositions of the raw materials, and the total amount of these main compositions is As 100wt%,
Total amount of magnesia-based refractory material and carbon-based refractory material: 70 to 9
9 wt% and 1 to 30 wt% of calcium carbonate and/or magnesium carbonate having a particle size of 1 mm or less, and an external amount of 10 to 90 wt% of metal with respect to the total amount of 100 wt% of the calcium carbonate and/or magnesium carbonate. A magnesia-carbon refractory brick characterized by containing powder. 2 The magnesia-based refractory material and the carbon refractory material have a total amount of 100 wt%, and the magnesia-based refractory material 55
The magnesia-carbon refractory brick according to claim 1, characterized in that the content of the magnesia-carbon refractory brick is 97 wt% and 3 to 45 wt% of the carbon-based refractory material. 3. Claim 1 or 2, wherein the metal powder is one or a combination of two or more selected from silicon, aluminum, magnesium, molybdenum, and chromium, or an alloy of these metals. Magnesia-carbon refractory brick described in . 4 Silicon and/or aluminum metal, these metals and/or silicon alloy and/or aluminum alloy 10 to 10% by weight relative to the total amount of calcium carbonate and/or magnesium carbonate 100 wt%
The magnesia-carbon refractory brick according to any one of claims 1 to 3, characterized in that it contains 50 wt%. 5 Magnesium and/or molybdenum metal, these metals and/or
The magnesia-carbon refractory brick according to any one of claims 1 to 4, characterized in that it contains 30 to 70 wt% of a magnesium alloy and/or a molybdenum alloy. 6 Chromium 50 to 50% by weight relative to the total amount of calcium carbonate and/or magnesium carbonate 100wt%
The magnesia-carbon refractory brick according to any one of claims 1 to 5, characterized in that it contains 90 wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2286639A JPH04160052A (en) | 1990-10-23 | 1990-10-23 | Magnesia-carbon refractory brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2286639A JPH04160052A (en) | 1990-10-23 | 1990-10-23 | Magnesia-carbon refractory brick |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04160052A true JPH04160052A (en) | 1992-06-03 |
Family
ID=17707025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2286639A Pending JPH04160052A (en) | 1990-10-23 | 1990-10-23 | Magnesia-carbon refractory brick |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04160052A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100433247B1 (en) * | 2002-01-21 | 2004-05-27 | 김창호 | Coating composite of internal wall of converter and its preparations method |
-
1990
- 1990-10-23 JP JP2286639A patent/JPH04160052A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100433247B1 (en) * | 2002-01-21 | 2004-05-27 | 김창호 | Coating composite of internal wall of converter and its preparations method |
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