JPH06179902A - Production of metallic powder for monolithic refractory - Google Patents
Production of metallic powder for monolithic refractoryInfo
- Publication number
- JPH06179902A JPH06179902A JP4333063A JP33306392A JPH06179902A JP H06179902 A JPH06179902 A JP H06179902A JP 4333063 A JP4333063 A JP 4333063A JP 33306392 A JP33306392 A JP 33306392A JP H06179902 A JPH06179902 A JP H06179902A
- Authority
- JP
- Japan
- Prior art keywords
- metal powder
- metallic powder
- phosphate
- solution containing
- monolithic refractory
- 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
- 239000000843 powder Substances 0.000 title claims abstract description 60
- 239000011823 monolithic refractory Substances 0.000 title abstract 4
- 238000004519 manufacturing process Methods 0.000 title description 3
- 229910052751 metal Inorganic materials 0.000 claims abstract description 57
- 239000002184 metal Substances 0.000 claims abstract description 57
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 17
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 16
- 239000010452 phosphate Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003513 alkali Substances 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 6
- 239000011574 phosphorus Substances 0.000 claims abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 4
- 239000011777 magnesium Substances 0.000 claims abstract description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 3
- 239000000956 alloy Substances 0.000 claims abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 3
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 3
- 239000010703 silicon Substances 0.000 claims abstract description 3
- 239000002904 solvent Substances 0.000 claims abstract description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 7
- 239000011247 coating layer Substances 0.000 claims description 5
- 239000003125 aqueous solvent Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052799 carbon Inorganic materials 0.000 abstract description 8
- 239000011248 coating agent Substances 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 5
- 239000003960 organic solvent Substances 0.000 abstract description 5
- 230000003078 antioxidant effect Effects 0.000 abstract description 4
- 239000003963 antioxidant agent Substances 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract description 2
- 235000006708 antioxidants Nutrition 0.000 abstract 1
- 238000005189 flocculation Methods 0.000 abstract 1
- 230000016615 flocculation Effects 0.000 abstract 1
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 12
- 229920005989 resin Polymers 0.000 description 10
- 239000011347 resin Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000006703 hydration reaction Methods 0.000 description 5
- 230000002776 aggregation Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 238000004220 aggregation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- FENFUOGYJVOCRY-UHFFFAOYSA-N 1-propoxypropan-2-ol Chemical compound CCCOCC(C)O FENFUOGYJVOCRY-UHFFFAOYSA-N 0.000 description 1
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 238000001636 atomic emission spectroscopy Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229940028356 diethylene glycol monobutyl ether Drugs 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical compound O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000011271 tar pitch Substances 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings ; Increasing the durability of linings; Breaking away linings
- F27D1/1636—Repairing linings by projecting or spraying refractory materials on the lining
- F27D1/1642—Repairing linings by projecting or spraying refractory materials on the lining using a gunning apparatus
- F27D1/1647—Repairing linings by projecting or spraying refractory materials on the lining using a gunning apparatus the projected materials being partly melted, e.g. by exothermic reactions of metals (Al, Si) with oxygen
Landscapes
- Powder Metallurgy (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、不定形耐火物用材料と
して耐アルカリ性被覆層を有する金属粉末の製造方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a metal powder having an alkali resistant coating layer as a material for an irregular shaped refractory material.
【０００２】[0002]
【従来の技術および発明が解決しようとする課題】含炭
素不定形耐火物には、通常炭素の酸化防止剤として金属
粉末が配合されている。このような含炭素不定形耐火物
を水を用いて湿式施工した場合、施工（鋳込）後養生、
乾燥、空焼きに至るまでの間に不定形耐火物中に骨材ま
たは結合剤として配合されたセメントからＭｇ、Ｃａな
どのアルカリ性イオンが徐々に溶出する結果、金属粉末
は激しい発熱、発泡を伴う水和反応を起こし、金属水和
物に変化してしまう。従って、上記の不定形耐火物から
安定な施工体は得られない。2. Description of the Related Art Carbon-containing amorphous refractories are usually blended with a metal powder as a carbon antioxidant. When such a carbon-containing amorphous refractory is wet-processed using water, curing after execution (casting),
During drying and air-baking, alkaline ions such as Mg and Ca gradually elute from the cement mixed as an aggregate or binder in the irregular shaped refractory, resulting in intense heat generation and foaming of the metal powder. It causes a hydration reaction and changes into a metal hydrate. Therefore, a stable construction body cannot be obtained from the above-mentioned amorphous refractory material.
【０００３】金属粉末の水和反応を防止するために金属
粉末を耐アルカリ性被覆層で被覆することが提案されて
いる。特開昭 58-190876号公報には、炭素粒子とアルミ
粉末をフェノール樹脂などの熱硬化性合成樹脂で被覆す
ることにより、炭素の耐酸化性を改善すると共にアルミ
粉末の水和反応を有利に防止し、その結果耐酸化性、熱
間強度、耐スポーリング性、耐食性に優れた不定形耐火
物の施工体が得られることが開示されている。また、特
開昭60-86080号公報には、タールピッチなどで被覆した
アルミ合金粉を用いて高温強度の高い耐酸化性に優れた
不定形耐火物が得られることが開示されている。It has been proposed to coat the metal powder with an alkali resistant coating to prevent hydration of the metal powder. JP-A-58-190876 discloses that carbon particles and aluminum powder are coated with a thermosetting synthetic resin such as phenol resin to improve the oxidation resistance of carbon and to favor the hydration reaction of aluminum powder. It is disclosed that a construction product of an irregular shaped refractory which is excellent in oxidation resistance, hot strength, spalling resistance and corrosion resistance can be obtained. Further, JP-A-60-86080 discloses that an amorphous refractory having high temperature strength and excellent oxidation resistance can be obtained by using aluminum alloy powder coated with tar pitch or the like.
【０００４】前記した従来方法はいずれも、金属粉末を
樹脂被覆材で均一に被覆することが困難であるために突
き出しと称する金属粉末の露出した部分が生じ、その上
施工時の骨材との混練操作で被覆層が損傷を受けるため
に金属粉末の露出した部分が生じ、金属粉末の水和反応
を確実に防止することはできなかった。In all of the above-mentioned conventional methods, it is difficult to uniformly coat the metal powder with the resin coating material, so that an exposed portion of the metal powder called "protrusion" is generated, and further, it is difficult to form an aggregate during the construction. Since the coating layer was damaged by the kneading operation, an exposed portion of the metal powder was produced, and the hydration reaction of the metal powder could not be reliably prevented.
【０００５】樹脂で被覆した金属粉末の場合、金属含有
量が５０重量％程度であるため、樹脂で被覆していない
金属粉末による炭素の酸化防止効果と同等の効果を得る
には添加量を約２倍に増加しなければならないという欠
点がある。また、金属粉末を樹脂で被覆するとき凝集が
生じ、そのため炭素の酸化防止効果が低下するという欠
点もある。In the case of resin-coated metal powder, the metal content is about 50% by weight, and therefore the addition amount should be about 50% in order to obtain the same effect as the antioxidation effect of carbon by the metal powder not coated with resin. The drawback is that it has to be doubled. Further, when the metal powder is coated with a resin, agglomeration occurs, which results in a decrease in the carbon antioxidant effect.
【０００６】従って、本発明の目的は、樹脂による被覆
を行わずに、１次粒子に近い形状で金属含有量がほぼ１
００重量％の不定形耐火物用の耐アルカリ性被覆層を有
する金属粉末を提供することにある。Therefore, an object of the present invention is to provide a metal having a shape close to that of primary particles and a metal content of about 1 without coating with a resin.
An object of the present invention is to provide a metal powder having an alkali-resistant coating layer for amorphous refractory having a weight percentage of 00.
【０００７】[0007]
【課題を解決するための手段】本発明により提供される
耐アルカリ性被覆層を有する不定形耐火物用金属粉末の
製造方法は、金属粉末を水性溶媒中に燐酸塩を含む溶液
で処理し、水を５％以上溶解可能な有機溶媒で洗浄後、
濾過し、乾燥させることを特徴とする。The method for producing a metal powder for an amorphous refractory having an alkali resistant coating layer provided by the present invention comprises treating a metal powder with a solution containing a phosphate salt in an aqueous solvent, Is washed with an organic solvent capable of dissolving 5% or more,
It is characterized by being filtered and dried.
【０００８】本発明方法における第一段階は金属粉末の
処理である。この段階で金属粉末の表面に均一に燐酸塩
を析出せしめ、燐含有薄膜コートを形成させる。金属粉
末の処理に使用される処理溶液は水性溶媒中に燐酸塩を
含む溶液である。処理される金属粉末はアルミニウム、
マグネシウム、シリコンの単体またはその合金から選択
される少なくとも１つである。燐酸塩溶液中の溶媒は水
性溶媒、すなわち水または水と親水性有機溶媒（例え
ば、イソプロピルアルコール、エチルアルコール、エチ
レングリコール）との混合物である。燐酸塩は燐酸のア
ルカリ金属、アルカリ土類金属もしくはアンモニウム塩
であり、好ましくはＮＨ4 Ｈ2 ＰＯ4 または（ＮＨ4 ）
2 ＨＰＯ4 である。金属粉末に対する燐酸塩の添加割合
は金属粉末の表面に均一に燐酸塩が析出し得るように決
定され、全金属粉末に対して通常０．００５重量％以
上、好ましくは０．０１〜１重量％の燐を含有する処理
溶液が使用される。前記濃度が０．００５重量％未満の
場合には、金属粉末の表面に均一に燐酸塩が析出し得な
いため金属粉末の水和反応を完全に防止することができ
ず、一方濃度が１重量％を越えると金属粉末表面に吸着
していない遊離の燐酸イオンの量が多くなり、耐火物の
強度などの特性を低下させる原因となる。処理温度は通
常５〜６０℃であり、処理時間は通常５〜１２０分であ
る。The first step in the method of the present invention is the treatment of metal powder. At this stage, phosphate is uniformly deposited on the surface of the metal powder to form a phosphorus-containing thin film coat. The treatment solution used for treating the metal powder is a solution containing phosphate in an aqueous solvent. The metal powder to be treated is aluminum,
It is at least one selected from a simple substance of magnesium and silicon or an alloy thereof. The solvent in the phosphate solution is an aqueous solvent, ie water or a mixture of water and a hydrophilic organic solvent (eg isopropyl alcohol, ethyl alcohol, ethylene glycol). Phosphate is an alkali metal, alkaline earth metal or ammonium salt of phosphoric acid, preferably NH 4 H 2 PO 4 or (NH 4 ).
2 HPO 4 . The addition ratio of the phosphate to the metal powder is determined so that the phosphate can be uniformly deposited on the surface of the metal powder, and is usually 0.005% by weight or more, preferably 0.01 to 1% by weight, based on the total metal powder. A processing solution containing phosphorus is used. If the concentration is less than 0.005% by weight, the phosphate cannot be uniformly deposited on the surface of the metal powder, so that the hydration reaction of the metal powder cannot be completely prevented, while the concentration is 1% by weight. If it exceeds 0.1%, the amount of free phosphate ions not adsorbed on the surface of the metal powder increases, which causes deterioration of properties such as strength of the refractory. The treatment temperature is usually 5 to 60 ° C., and the treatment time is usually 5 to 120 minutes.
【０００９】本発明方法の第二段階は燐含有薄膜コート
を有する金属粉末の洗浄である。この段階で金属粉末の
凝集が防止されると共に燐酸塩を金属粉末表面に強固に
固着・析出せしめる。表面処理後のスラリーを固液分離
したケーキには金属粉末同志の凝集原因となる水分や未
反応の燐酸塩が含まれており、これらを完全に除去する
必要がある。金属粉末の洗浄には、水を５％以上溶解可
能な任意の有機溶媒が使用され、例えばイソプロピルア
ルコール、プロピレングリコールプロピルエーテル、エ
チレングリコールモノブチルエーテル、ジエチレングリ
コールモノブチルエーテルが使用される。処理液は、金
属粉末に対して通常５〜２００重量％、好ましくは２０
〜７０重量％の割合で使用される。The second step of the method of the present invention is the cleaning of the metal powder with a phosphorus-containing thin film coat. At this stage, the aggregation of the metal powder is prevented and the phosphate is firmly fixed and deposited on the surface of the metal powder. The cake obtained by solid-liquid separation of the slurry after surface treatment contains water and unreacted phosphate that cause aggregation of metal powders, and it is necessary to completely remove them. For washing the metal powder, any organic solvent capable of dissolving 5% or more of water is used, and for example, isopropyl alcohol, propylene glycol propyl ether, ethylene glycol monobutyl ether, diethylene glycol monobutyl ether is used. The treatment liquid is usually 5 to 200% by weight with respect to the metal powder, preferably 20
Used in a proportion of ˜70% by weight.
【００１０】本発明の第三段階は濾過及び乾燥である。
濾過及び乾燥は慣用手段に従って行われ、乾燥温度は通
常６０〜２００℃である。The third step of the present invention is filtration and drying.
Filtration and drying are carried out according to conventional means, and the drying temperature is usually 60 to 200 ° C.
【００１１】[0011]
【実施例】以下に本発明の非限定的実施例を示す。EXAMPLES The following are non-limiting examples of the present invention.
【００１２】実施例１〜５および比較例１〜２ 表１に示す組成の溶液中に金属粉末を混入し、２５℃で
６０分間処理した。この粉末を真空濾過して得た湿潤状
態の金属粉末を、金属粉末に対して３０重量％のイソプ
ロピルアルコールで洗浄した。洗浄した金属粉末を濾過
後、１００℃で乾燥して、燐酸塩処理金属粉末を得た。 Examples 1 to 5 and Comparative Examples 1 to 2 Metal powder was mixed in the solutions having the compositions shown in Table 1 and treated at 25 ° C. for 60 minutes. The wet metal powder obtained by vacuum-filtering this powder was washed with 30% by weight of isopropyl alcohol based on the metal powder. The washed metal powder was filtered and then dried at 100 ° C. to obtain a phosphate-treated metal powder.
【００１３】比較のために、燐酸塩処理を施さなかった
金属粉末（比較例１）および実施例２と同一の処理溶液
を用いて処理したが、イソプロピルアルコールによる洗
浄なしに濾過、乾燥して得た金属粉末（比較例２）を用
意した。For comparison, a metal powder which was not subjected to the phosphate treatment (Comparative Example 1) and the same treatment solution as in Example 2 were used, but they were obtained by filtration and drying without washing with isopropyl alcohol. A metal powder (Comparative Example 2) was prepared.
【００１４】得られた金属粉末の燐含有量を発光分光分
析で測定した。結果を表１に示す。The phosphorus content of the obtained metal powder was measured by optical emission spectroscopy. The results are shown in Table 1.
【００１５】比較例３〜５ 従来の樹脂被覆金属粉末を、金属粉末と樹脂を混合し、
混合物を１２０℃に加熱してエアアトマイズして製造し
た。 Comparative Examples 3 to 5 Conventional resin-coated metal powder was mixed with metal powder and resin,
The mixture was heated to 120 ° C. and air atomized to prepare the mixture.
【００１６】[0016]
【表１】 [Table 1]
【００１７】得られた金属粉末の耐アルカリ性を調べる
ために、下記成分を竪型ミキサー内に導入し、３分間混
練することにより不定形耐火物組成物を調製した。ただ
し、樹脂被覆金属粉末は−２０〜＋２０メッシュに分級
後、組成物を調製した。In order to examine the alkali resistance of the obtained metal powder, the following components were introduced into a vertical mixer and kneaded for 3 minutes to prepare an amorphous refractory composition. However, the resin-coated metal powder was classified to -20 to +20 mesh to prepare a composition.
【００１８】 アルミナ（−0.3 mm） 75重量％ 炭化珪素（−0.15mm） 5 黒鉛（− 0.5mm） 5 超微粉シリカ 2 ヘキサメタリン酸ソーダ 1 セメント 2 金属粉末（金属分として） 2 水 8 この耐火物組成物 100ｇを30℃に保持し、２４時間後の
水素ガス発生蓄積量を測定した。結果を表２に示す。Alumina (-0.3 mm) 75% by weight Silicon carbide (-0.15 mm) 5 Graphite (-0.5 mm) 5 Ultrafine silica 2 Sodium hexametaphosphate 1 Cement 2 Metal powder (as metal content) 2 Water 8 This refractory 100 g of the composition was kept at 30 ° C., and the amount of hydrogen gas generated and accumulated after 24 hours was measured. The results are shown in Table 2.
【００１９】[0019]
【表２】表 ２ 水素ガス発生蓄積量 実施例１ 59ml ２ 20 ３ 17 ４ 15 ５ 25 比較例１ ＞ 100 （50分） ２ ＞ 100 （12時間） ３ ＞ 100 （ 2時間） ４ ＞ 100 （ 2時間） ５ ＞ 100 （ 2時間） 比較例中、括弧内の数値は 100mlに達した時間である。[Table 2] Table 2 Amount of hydrogen gas generated and accumulated Example 1 59 ml 2 20 3 17 4 15 5 25 Comparative Example 1> 100 (50 minutes) 2> 100 (12 hours) 3> 100 (2 hours) 4> 100 ( 2 hours) 5> 100 (2 hours) In the comparative examples, the value in parentheses is the time when 100 ml was reached.
【００２０】[0020]
【発明の効果】本発明方法により製造される金属粉末
は、従来の被覆材として樹脂を使用して製造される金属
粉末に比較して耐アルカリ性に優れているため、不定形
耐火物中の炭素の酸化防止剤として非常に有用である。
また、被覆材として樹脂を使用していないため、粒子の
凝集を生ずることなく、金属含有量がほぼ１００重量％
の不定形耐火物用金属粉末が提供され得る。The metal powder produced by the method of the present invention is superior in alkali resistance to the metal powder produced by using a resin as a conventional coating material. It is very useful as an antioxidant.
In addition, since no resin is used as the covering material, the metal content is almost 100% by weight without causing aggregation of particles.
Amorphous refractory metal powder can be provided.
Claims (3)
物用金属粉末の製造方法であって、金属粉末を水性溶媒
中に燐酸塩を含む溶液で処理し、水を５％以上溶解可能
な有機溶媒で洗浄後、濾過し、乾燥させることを特徴と
する、前記方法。1. A method of producing a metal powder for an amorphous refractory having an alkali resistant coating layer, which comprises treating a metal powder with a solution containing a phosphate in an aqueous solvent to dissolve water in an amount of 5% or more. The above method, which comprises washing with a solvent, filtering and drying.
上の燐を含有する燐酸塩溶液を用いることを特徴とす
る、請求項１に記載の方法。2. A method according to claim 1, characterized in that a phosphate solution containing 0.005% by weight or more of phosphorus, based on the total metal powder, is used.
ム、シリコンの単体またはその合金から選択される少な
くとも１つであることを特徴とする、請求項１に記載の
方法。3. The method according to claim 1, wherein the metal powder is at least one selected from the group consisting of aluminum, magnesium, silicon, and alloys thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4333063A JPH06179902A (en) | 1992-12-14 | 1992-12-14 | Production of metallic powder for monolithic refractory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4333063A JPH06179902A (en) | 1992-12-14 | 1992-12-14 | Production of metallic powder for monolithic refractory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06179902A true JPH06179902A (en) | 1994-06-28 |
Family
ID=18261854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4333063A Pending JPH06179902A (en) | 1992-12-14 | 1992-12-14 | Production of metallic powder for monolithic refractory |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06179902A (en) |
-
1992
- 1992-12-14 JP JP4333063A patent/JPH06179902A/en active Pending
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