JP2015501777A - 焼成アルミナを電気アーク炉で溶融させたコランダムをベースとした酸化チタン含有酸化アルミニウム粒子及びその製造方法 - Google Patents
焼成アルミナを電気アーク炉で溶融させたコランダムをベースとした酸化チタン含有酸化アルミニウム粒子及びその製造方法 Download PDFInfo
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- 239000002245 particle Substances 0.000 title claims abstract description 55
- 229910052593 corundum Inorganic materials 0.000 title claims abstract description 46
- 239000010431 corundum Substances 0.000 title claims abstract description 46
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 title claims abstract description 39
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 32
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 30
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000002844 melting Methods 0.000 title claims abstract description 16
- 230000008018 melting Effects 0.000 title claims abstract description 16
- 238000010891 electric arc Methods 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 23
- 239000002994 raw material Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 15
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 12
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 6
- 238000010191 image analysis Methods 0.000 claims description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000003082 abrasive agent Substances 0.000 claims description 3
- 239000011819 refractory material Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000003610 charcoal Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000009826 distribution Methods 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 claims description 2
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 claims description 2
- 231100000719 pollutant Toxicity 0.000 claims description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 abstract description 4
- 229910001928 zirconium oxide Inorganic materials 0.000 abstract description 4
- 229910001570 bauxite Inorganic materials 0.000 description 22
- 238000005498 polishing Methods 0.000 description 7
- 239000010936 titanium Substances 0.000 description 7
- 239000000047 product Substances 0.000 description 6
- 239000000356 contaminant Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 239000010421 standard material Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- MCSXGCZMEPXKIW-UHFFFAOYSA-N 3-hydroxy-4-[(4-methyl-2-nitrophenyl)diazenyl]-N-(3-nitrophenyl)naphthalene-2-carboxamide Chemical compound Cc1ccc(N=Nc2c(O)c(cc3ccccc23)C(=O)Nc2cccc(c2)[N+]([O-])=O)c(c1)[N+]([O-])=O MCSXGCZMEPXKIW-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000009781 Myrtillocactus geometrizans Nutrition 0.000 description 1
- 240000009125 Myrtillocactus geometrizans Species 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000879 optical micrograph Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 102220047090 rs6152 Human genes 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C01—INORGANIC CHEMISTRY
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- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/38—Preparation of aluminium oxide by thermal reduction of aluminous minerals
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- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
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- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
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Abstract
Description
以下の比較試験に用いられる半破砕性コランダムの製造は、最新技術による標準的な製法に従って行った。この製法は、意図的にその後の生産要求に適合させたため、返品又は試作の廃棄物も使用した。アルミナをベースとした製品FR(al)は、通常の標準品のボーキサイトの代わりに、Fe、Ti及びSiを含有する付加物を含む純アルミナを使用して、半破砕性コランダムの化学組成に調整した。
粒径がP40の半破砕性コランダム砥粒を用いたフラップホイールを使用し、BFRPL(bx)という名称のボーキサイトをベースとした標準的な材料と、実施例1に記載するアルミニウムBFRPL(al)をベースとした半破砕性コランダムとを比較した。600mm×5mm×60mmの寸法の鉄板を処理し、表面の60mm×5mmを除去した。研磨試験の結果を次の表2にまとめる。
粒径P36の半破砕性コランダムで、直径180mmの合成樹脂接合カットオフホイールを作り、これを用いて寸法30.4mm×8.2mmの構造用鋼材ST37を切断した。このために、そのつど、3回プレカットした後に、送り速度0.9cm2/秒、8000rpmの回転で12回カットを行った。この結果を表3にまとめる。
上述の研磨試験で判明した、化学組成のわずかな違いによって性能が異なるという事実の説明が難しかったことから、ボーキサイトをベースとした半破砕性コランダムと、アルミナをベースとした半破砕性コランダムとの追加的な比較解析を行い、粒形を重点的に検討した。このために、製造作業中に処理し、かつ同一条件下で全く同じ粉砕システムで処理した、ボーキサイトをベースとした標準材料及び酸化アルミニウムをベースとした半破砕性コランダムの粒径F36の顆粒を互いに比較した。粒径F36一盛分を光学顕微鏡で撮影し、次いで画像解析ソフトウェアImageJ(バージョン1.44p)を用いて解析した。
画像解析ソフトウェアのパラメータは、以下のように指定した:
円形度
C=円形度、
A
=表面積、
P=外周
縦横比
AR=縦横比、
dmax=最大直径、
dmin=最小直径
緻密度(立体性)
S=立体性、
A=実際の粒子表面、
B=凸状の粒子表面
Claims (4)
- 以下の化学組成を有する焼成アルミナを電気アーク炉で溶融させたコランダムをベースとした酸化チタン含有酸化アルミニウム粒子であって:
-Al2O3>97.0質量%、
-Fe2O3 0.05〜0.2質量%、
-SiO2 0.1〜0.5質量%、
-TiO2 1.3〜1.8質量%、
-ZrO2 0.02〜0.1質量%、
-Na2O 0.05〜2.0質量%、及び
-その他(CaO、MgO、K2O)<0.2質量%、
該組成のいずれも溶融コランダムの総質量に基づくものであり、
Na2Oの質量百分率に対するFe2O3、SiO2及びZrO2の質量百分率の合計の比率が10未満であることを特徴とする酸化アルミニウム粒子。 - 前記酸化アルミニウム粒子の緻密度の算術平均が0.8未満であり、前記緻密度の尺度が、画像解析を用いて決定され、且つ凸状の粒子表面(B)に対する実際の粒子表面(A)の比率として定義された立体性(S)であることを特徴とする、請求項1に記載の酸化アルミニウム粒子。
- アルミナを電気アーク炉で溶融させたコランダムをベースとした酸化チタン含有酸化アルミニウム粒子を製造する方法であって:
-Al2O3、TiO2、SiO2及びFeO3を含有する原料の混合物を、鉄屑及び炭の存在下で、電気アーク炉で溶融させる工程、
-溶融混合物を冷却し、実質的にコランダムから成る固形ブロックを得る工程、並びに
-得られたコランダムブロックを所定の粒度分布に粉砕処理する工程
を含み、
汚染物質を少量含有する原料が、
-Al2O3>97.0質量%、
-Fe2O3 0.05〜0.2質量%、
-SiO2 0.1〜0.5質量%、
-TiO2 1.3〜1.8質量%、
-ZrO2 0.02〜0.1質量%、
-Na2O 0.05〜2.0質量%、及び
-その他(CaO、MgO、K2O)<0.2質量%
の化学組成を有し且つ緻密度の算術平均が0.8未満である酸化チタン含有酸化アルミニウム粒子が形成される量で、焼成アルミナ、ルチル、チタン鉄鉱及び鉄鉱石からなる群から選択される原料として用いられ、前記緻密度の尺度が、画像解析を用いて決定され、且つ凸状の粒子表面(B)に対する実際の粒子表面(A)の比率として定義された立体性(S)である、方法。 - 研磨材及び/又は耐火材料の製造のための請求項1又は2に記載の酸化アルミニウム粒子の使用。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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DE102011087147.0 | 2011-11-25 | ||
DE102011087147.0A DE102011087147B4 (de) | 2011-11-25 | 2011-11-25 | Titanoxidhaltige Aluminiumoxidpartikel auf Basis von im elektrischen Lichtbogenofen aus kalzinierter Tonerde geschmolzenem Korund sowie ein Verfahren zu deren Herstellung und ihre Verwendung |
PCT/EP2012/073471 WO2013076249A2 (de) | 2011-11-25 | 2012-11-23 | Titanoxidhaltige aluminiumoxidpartikel auf basis von im elektrischen lichtbogenofen aus kalzinierter tonerde geschmolzenem korund sowie ein verfahren zu deren herstellung |
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JP2016539889A (ja) * | 2013-10-04 | 2016-12-22 | センター フォア アブラシブズ アンド リフラクトリーズ リサーチ アンド ディベロップメント ツェー アー エァ エァ デー ゲゼルシャフト ミット ベシュレンクテル ハフツング | 増大した靭性を備えた溶融酸化アルミニウムをベースとする、多結晶質の多孔性Al2O3物体およびその使用 |
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DE102011087147B4 (de) | 2011-11-25 | 2015-02-26 | C.A.R.R.D. Gmbh | Titanoxidhaltige Aluminiumoxidpartikel auf Basis von im elektrischen Lichtbogenofen aus kalzinierter Tonerde geschmolzenem Korund sowie ein Verfahren zu deren Herstellung und ihre Verwendung |
RU2620800C1 (ru) * | 2015-12-08 | 2017-05-29 | федеральное государственное автономное образовательное учреждение высшего образования "Казанский (Приволжский) федеральный университет" (ФГАОУ ВО КФУ) | Способ получения плавленого корунда |
CN105622074A (zh) * | 2016-01-03 | 2016-06-01 | 安徽律正科技信息服务有限公司 | 一种用于金属精细研磨的研磨石 |
WO2018003655A1 (en) * | 2016-06-28 | 2018-01-04 | Showa Denko K.K. | Electrofused alumina grains, production method for electrofused alumina grains, grinding stone, and coated abrasive |
CN109092514B (zh) * | 2018-07-25 | 2021-04-06 | 信阳核工业新材料有限公司 | 一种高流动性石英粉的制备方法 |
CN109181642B (zh) * | 2018-10-08 | 2020-11-03 | 贵州银星新材料科技有限公司 | 一种半脆刚玉磨料及其制备方法 |
CN112592162A (zh) * | 2020-12-15 | 2021-04-02 | 洛阳利尔功能材料有限公司 | 一种电熔白刚玉生产工艺 |
KR20230171168A (ko) | 2022-06-13 | 2023-12-20 | 주식회사 엔디소프트 | 화자분할 기술이 적용된 앱을 이용한 단말기 음성 대화 방법 |
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JPS5379797A (en) * | 1976-12-22 | 1978-07-14 | Dynamit Nobel Ag | Method of making electrically molten corrundum |
JPS6144970A (ja) * | 1984-08-01 | 1986-03-04 | トライバツハー・ケミツシエ・ベルケ・アクチエンゲゼルシヤフト | 研磨材の製造方法 |
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KR20140095570A (ko) | 2014-08-01 |
CN103958413B (zh) | 2016-01-13 |
EP2782871B1 (de) | 2019-01-09 |
WO2013076249A2 (de) | 2013-05-30 |
DE102011087147B4 (de) | 2015-02-26 |
WO2013076249A3 (de) | 2013-08-01 |
RU2582399C2 (ru) | 2016-04-27 |
JP6034395B2 (ja) | 2016-11-30 |
DE102011087147A1 (de) | 2013-05-29 |
BR112014012106A2 (pt) | 2017-08-22 |
KR101577924B1 (ko) | 2015-12-15 |
RU2014125555A (ru) | 2015-12-27 |
EP2782871A2 (de) | 2014-10-01 |
BR112014012106B1 (pt) | 2021-07-27 |
US20150175769A1 (en) | 2015-06-25 |
CN103958413A (zh) | 2014-07-30 |
US9163128B2 (en) | 2015-10-20 |
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