JPS63176401A - Iron powder for body warmer - Google Patents
Iron powder for body warmerInfo
- Publication number
- JPS63176401A JPS63176401A JP62007207A JP720787A JPS63176401A JP S63176401 A JPS63176401 A JP S63176401A JP 62007207 A JP62007207 A JP 62007207A JP 720787 A JP720787 A JP 720787A JP S63176401 A JPS63176401 A JP S63176401A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- iron
- iron powder
- pig
- mesh
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 239000000843 powder Substances 0.000 claims abstract description 37
- 229910000805 Pig iron Inorganic materials 0.000 claims abstract description 34
- 238000010298 pulverizing process Methods 0.000 claims abstract description 9
- 229910000915 Free machining steel Inorganic materials 0.000 claims abstract description 8
- 238000009692 water atomization Methods 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000000889 atomisation Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 239000000203 mixture Substances 0.000 abstract description 8
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- 238000010301 surface-oxidation reaction Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 description 15
- 238000007254 oxidation reaction Methods 0.000 description 11
- 230000003647 oxidation Effects 0.000 description 9
- 230000020169 heat generation Effects 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 229910000851 Alloy steel Inorganic materials 0.000 description 5
- 239000011812 mixed powder Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000012256 powdered iron Substances 0.000 description 2
- 241000272201 Columbiformes Species 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 239000002683 reaction inhibitor Substances 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、カイロ用鉄粉に関し、特にその低コスト化
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to iron powder for body warmers, and particularly relates to cost reduction thereof.
鉄粉の酸化熱を利用したカイロは携帯に便利なこと、廃
棄が容易なことなどから、最近、広く使用されるように
なって来た。Warmer warmers that utilize the oxidation heat of iron powder have recently become widely used because they are convenient to carry and easy to dispose of.
第１図にこの種のカイロの構造の１例を示す。FIG. 1 shows an example of the structure of this type of body warmer.
図において、内装袋１内にはカイロ用鉄粉２が収納され
、又内装袋ｌと外装袋３との間には酸化剤４が収納され
ており、使用する際には内装袋１を破って鉄粉２と酸化
剤４とを混合させて所望の酸化を起こさせるというもの
である。そし”ζ従来のカイロ用鉄粉２としては、第１
表に示されるように、粒度が−８０メソシユ９８％以上
で全鉄粉看が９８％以上のアトマイズ鉄粉に、粒度が−
２５０メンシ１８０％以上で全鉄粉量が９５％以上の還
元鉄粉を混合したものが使用されている（特開昭５５−
１６３２０号公報参照）。In the figure, iron powder 2 for body warmers is stored in an inner bag 1, and an oxidizing agent 4 is stored between an inner bag 1 and an outer bag 3. When using the inner bag 1, the inner bag 1 must be torn. Iron powder 2 and oxidizing agent 4 are mixed to cause desired oxidation. As the conventional iron powder 2 for body warmers, the first
As shown in the table, the atomized iron powder with a particle size of -80 meso-98% or more and a total iron powder count of 98% or more,
A mixture of reduced iron powder with a total iron powder content of 95% or more is used (Japanese Unexamined Patent Application Publication No. 1983-1999).
(See Publication No. 16320).
ところで鉄粉の発熱程度（酸化）に関連する因子として
は次の°２点が挙げられ、良好な酸化を進行させるため
にはこの２点の因子を確保することが要求される。By the way, factors related to the degree of heat generation (oxidation) of iron powder include the following two points, and it is required to ensure these two factors in order to proceed with good oxidation.
■ 比表面積が大であること（微粉の量が大で１
あること）。■ The specific surface area is large (the amount of fine powder is large and
).
■ 鉄粉表面の活性が大であること（酸化等が極度にさ
れていないこと）。■ The surface of the iron powder must be highly active (not extremely oxidized).
そのため、従来、カイロ用鉄粉原料を製造する場合、原
料を電気炉で溶製して水アトマイズ法で霧化粉砕し、こ
れを鉄粉表面の活性を確保するために還元した後、比表
面積を確保するために破砕・解砕・解粒して製造するの
が一般的であった。Therefore, conventionally, when manufacturing iron powder raw materials for body warmers, the raw materials were melted in an electric furnace, atomized and crushed using a water atomization method, and after being reduced to ensure the activity of the iron powder surface, the specific surface area was In order to ensure this, it was common to manufacture by crushing, crushing, and pulverizing.
しかし従来のカイロ用鉄粉では、原料としてアトマイズ
鉄粉と還元鉄粉との混合粉を使用しているので、所望の
発熱温度特性を得るためには、主原料であるアトマイズ
鉄粉として粒度が−８０メツシュ以上の高級品を使用す
る必要があるとともに、鉄粉の表面を活性化するために
低温還元する必要があり、コスト高になるという問題が
あった。また温度コントロール用の還元鉄粉についても
粒度が一２５０メツシュの高級品が必要であった。However, conventional iron powder for body warmers uses a mixed powder of atomized iron powder and reduced iron powder as the raw material, so in order to obtain the desired heat generation temperature characteristics, the particle size of the atomized iron powder, which is the main raw material, must be adjusted. It is necessary to use a high-quality product with a mesh size of -80 mesh or higher, and low-temperature reduction is required to activate the surface of the iron powder, resulting in high costs. Furthermore, high-quality reduced iron powder with a particle size of 1250 mesh was required for temperature control.
この発明は、かかる問題点に鑑み、低コスト化を図るこ
とのできるカイロ用鉄粉を提供せんとするものである。In view of these problems, the present invention aims to provide iron powder for body warmers that can reduce costs.
本件発明者はかかる課題を解決すべく鋭意研究した結果
、カイロ用鉄粉原料としてアトマイズ鉄粉に代えて粉鉄
を使用できれば上記問題点を解決できることを見い出し
、本発明をなしたものである。即ち、銑鉄は水アトマイ
ズ、還元・破砕・解粒と言う工程を経ずとも機械的な粉
砕のみで所望の微細粒度で、かつ水アトマイズしないこ
とからほとんど酸化していない微粉が得られ、コストは
安くなる。しかし粉鉄の発熱昇温特性はアトマイズ鉄粉
のそれと異なるため、通常のカイロ用鉄粉として用いる
ためには温度コントロールに工夫をする必要がある。即
ち、銑鉄には一般にＢ銑とＦ銑とがあるが、Ｂ銑は昇温
速度が成分的に大き過ぎるので昇温を遅らせることが必
要であり、一方Ｆ銑は昇温速度が遅すぎるので昇温を早
めることが必要である。。As a result of intensive research to solve such problems, the inventor of the present invention discovered that the above problems could be solved if powdered iron could be used instead of atomized iron powder as the raw material for iron powder for body warmers, and the present invention was created based on this finding. In other words, pig iron can be mechanically pulverized without going through the processes of water atomization, reduction, crushing, and pulverization, and the desired fine particle size can be obtained, and since it is not water atomized, a fine powder with almost no oxidation can be obtained, and the cost is low. Become cheap. However, the heat generation temperature rise characteristics of powdered iron are different from those of atomized iron powder, so it is necessary to devise ways to control the temperature in order to use it as iron powder for regular body warmers. In other words, there are generally two types of pig iron: B pig and F pig.B pig has a relatively high temperature rise rate, so it is necessary to delay the temperature rise, while F pig has a temperature rise rate that is too slow. It is necessary to accelerate the temperature rise. .
そこでこの発明にかかるカイロ用鉄粉は、銑鉄を機械的
手段で粉砕してなる粉砕銑と、アトマイズ法による鉄粉
とを混合してなることを特徴としている。Therefore, the iron powder for body warmers according to the present invention is characterized by being made by mixing pulverized pig iron obtained by pulverizing pig iron by mechanical means and iron powder obtained by atomization.
この発明においては、主原料として銑を使用すにように
したことから、機械的粉砕のみで、例えば粒度が一１０
０メッシュ９０％以上で、かつほとんど表面酸化してい
ない原料粉が得られ、これにより大きな比表面積と表面
活性とを確保しつつ従来工程で必要であった還元、粉砕
・解粒の工程を省略でき、コストを大幅に低減できる。In this invention, since pig iron is used as the main raw material, only mechanical pulverization is required, for example, the particle size is 110
A raw material powder with 0 mesh of 90% or more and almost no surface oxidation can be obtained, which ensures a large specific surface area and surface activity while omitting the reduction, pulverization, and pulverization steps required in conventional processes. This can significantly reduce costs.
又このように大きな比表面積と表面活性とが確保される
結果、温度制御剤についても、例えば−３５〜＋６０メ
・７シ二程度のアトマイズ鉄粉の粗粉を採用でき、これ
によって温度コントロールが可能である。In addition, as a result of securing a large specific surface area and surface activity, it is possible to use coarse atomized iron powder of, for example, -35 to +60 mm/7 mm for the temperature control agent, which makes temperature control possible. It is possible.
以下、本発明の実施例を図について説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
実施例 ｌ
第２表は本実施例のカイロ用鉄粉の主原料であるＦ銑の
化学成分を、第３表は昇温制御剤であるアトマイズ合金
粉の化学成分を示す。そしてＦ銑については機械的粉砕
によって一１００メツシュ９０％以上の粒度に粉砕し、
一方アトマイズ合金鋼粉については一３５〜＋６０メソ
シュの粉を使用し、粉砕Ｆ銑を６０〜８０重量％、アト
マイズ合金鋼粉を２０〜４０重量％混合してカイロ用鉄
粉の原料とした。Example 1 Table 2 shows the chemical composition of F pig, which is the main raw material for the iron powder for body warmers of this example, and Table 3 shows the chemical composition of the atomized alloy powder, which is the temperature increase control agent. For F pig iron, it is mechanically crushed to a particle size of 90% or more of 1100 mesh.
On the other hand, as for atomized alloy steel powder, powder of -35 to +60 mesosh was used, and 60 to 80% by weight of pulverized F pig iron and 20 to 40% by weight of atomized alloy steel powder were mixed to be used as a raw material for iron powder for body warmers.
また第２図は本実施例及び従来のカイロ用鉄粉を酸化し
た時の温度・時間特性を示し、図においてａは本実施例
の特性曲線を、ｂは従来の特性曲線を示す。これによれ
ば、本実施例では、立ち上がり時間（発熱開始後から４
０℃まで昇温するのに要する時間）は従来の約１７２に
なっている。これは、主原料であるＦ銑が機械的粉砕に
よって微粉化され、大きな比表面積と表面活性とが得ら
れたことによるものである。Further, FIG. 2 shows the temperature and time characteristics when oxidizing the iron powder for body warmers of this example and the conventional one, and in the figure, a shows the characteristic curve of this example, and b shows the conventional characteristic curve. According to this, in this embodiment, the rise time (from the start of heat generation to 4
The time required to raise the temperature to 0° C. is now approximately 172 seconds compared to the conventional method. This is because F pig iron, the main raw material, is pulverized by mechanical pulverization, resulting in a large specific surface area and surface activity.
また第３図は一１００メツシュの粉砕Ｆ銑、本実施例の
カイロ用鉄粉（−１００メツシュのわ）砕Ｆ銑と一３５
〜＋６０′メツシュの合金鋼粗粉との混合粉）及び従来
のカイロ用鉄粉の酸化発熱特性を示し、図においてＡは
粉砕Ｆ銑、Ｂは従来例、Ｃは本実施例の特性曲線を示す
、これによれば、特性曲線へに示すように、粉砕Ｆ銑の
みでは立ち上がり温度は急激に一ト昇し、立ち上がり時
間は極端に短いが、発熱開始後から１時間を経過すると
、従来のカイロ用鉄粉（特性曲線Ｂ）に比べて温度が約
５℃低くなる。これに対し、本実施例では、粉砕Ｆ銑に
昇温制御剤として発熱温度の低い水アトマイズ合金鋼粉
の粗粉（−３５〜＋６０メツシュ）を２０〜４０％添加
することにより、特性曲線Ｃに示すよう゛に、立ち上が
り速度は粉砕Ｆ鉄のみの場合より低く制御され、それだ
け立ち上がり後の温度低下が抑制されて安定化が図られ
、その結果立ち上がり速度が速くなり、かつそれ以後の
温度特性は従来のカイロ用鉄粉の１話度特性に近ずけら
れている。In addition, Fig. 3 shows 1,100 mesh pulverized F pig iron, iron powder for warmers (-100 mesh) of this example, and 135 mesh pulverized F pig iron.
The oxidation exothermic characteristics of the mixed powder with coarse alloy steel powder of ~+60' mesh) and the conventional iron powder for heating pads are shown. According to this, as shown in the characteristic curve, with only pulverized F pig, the start-up temperature rises rapidly and the start-up time is extremely short, but after 1 hour from the start of heat generation, The temperature is approximately 5°C lower than that of iron powder for body warmers (characteristic curve B). In contrast, in this example, by adding 20 to 40% of coarse powder (-35 to +60 mesh) of water atomized alloy steel powder with a low exothermic temperature as a temperature increase control agent to the pulverized pig F, the characteristic curve C As shown in Figure 2, the rising speed is controlled to be lower than when using only pulverized F iron, and the temperature drop after rising is suppressed and stabilized.As a result, the rising speed is faster, and the temperature characteristics thereafter are is close to the one-stroke characteristic of conventional iron powder for body warmers.
実施例 ２
第４表は本実施例のカイロ用鉄粉の主原料であるＢ銑の
化学成分を、第５表は昇温制御剤である快削鋼１５）の
化学成分を示す。そしてＢ銑については機械的粉砕によ
って一１００メツシュ９５％以上の粒度に粉砕し、一方
快削鋼粉については水アトマイズ法で製造し還元した粒
度−３５〜＋６０メツシュの粗粉を使用し、粉砕Ｂ銑を
７０〜９０重量％、快削鋼粉を１０〜３０重景％混合し
てカイロ用鉄粉の原料とした。Example 2 Table 4 shows the chemical composition of pig B, which is the main raw material for the iron powder for body warmers of this example, and Table 5 shows the chemical composition of free-cutting steel 15), which is a temperature increase control agent. The B piglet is mechanically pulverized to a particle size of 95% or more of 1100 mesh, while the free-cutting steel powder is produced using a water atomization method and reduced to a coarse powder with a particle size of -35 to +60 mesh. A raw material for iron powder for warmers was prepared by mixing 70 to 90% by weight of B pigeon and 10 to 30% by weight of free-cutting steel powder.
また第４図は本実施例（Ｂ鉄粉８０％十添加鉄粉２０％
）及び従来のカイロ用鉄粉を酸化した時の温度・時間特
性を示し、図においてＣは本実施例、ｄは従来の特性曲
線を示す。本実施例においても立ち上がり時間は従来の
約１７２になっている。主原料となるＢ銑を機械的粉砕
することにより、微細粉化されて比表面が大きくなると
ともに大きな表面活性が確保され、酸化反応が進行しや
すくなったためである。In addition, Figure 4 shows this example (B iron powder 80%, 10-added iron powder 20%).
) and the temperature/time characteristics when oxidizing conventional iron powder for body warmers. In the figure, C shows the present example, and d shows the conventional characteristic curve. In this embodiment as well, the rise time is approximately 172 seconds, which is the conventional value. This is because by mechanically crushing the B pig iron, which is the main raw material, it is finely pulverized, the specific surface becomes large, and high surface activity is ensured, making it easier for the oxidation reaction to proceed.
また第５図は粉砕Ｂ銑、本実施例（粉砕Ｂ銑８０％−ト
快削鋼粉２０％）及び従来のカイロ用鉄粉の酸化発熱特
性を示し、図において、Ｄは粉砕Ｂ銑、Ｅは従来例、Ｆ
は本実施例の温度特性曲線を示す。In addition, Fig. 5 shows the oxidation exothermic properties of pulverized B pig, this example (80% pulverized B pig - 20% free-cutting steel powder), and conventional iron powder for heating pads; in the figure, D indicates pulverized B pig; E is conventional example, F
shows the temperature characteristic curve of this example.
これによれば、特性曲線りに示すように、粉砕Ｂ銑のみ
では立ち上がり温度は急激に上昇するが、最高温度が６
５℃となり、従来のカイロ用鉄粉（特性曲線Ｅ）に比し
て約１０℃高くなる（ＪＩＳでは最高温度≦７０℃）。According to this, as shown in the characteristic curve, with only pulverized B pig, the start-up temperature rises rapidly, but the maximum temperature is 6.
The temperature is 5°C, which is about 10°C higher than that of conventional iron powder for body warmers (characteristic curve E) (maximum temperature ≦70°C according to JIS).
これに封し、本実施例では、Ｂ銑の粉砕粉に、比表面積
が小さく酸化反応熱の低い水アトマイズ製法の還元後の
快削鋼粉を１０〜３０重量％し添加することにより、特
性曲線Ｆに示すように、立ち上がり時の温度上昇が抑制
されて、従来のカイロ用鉄粉の温度特性に近ずけられて
いる。In addition, in this example, by adding 10 to 30% by weight of free-cutting steel powder, which has been reduced by the water atomization method and has a small specific surface area and low heat of oxidation reaction, to the pulverized powder of B pig, the characteristics As shown by curve F, the temperature rise during startup is suppressed, and the temperature characteristics are close to those of conventional iron powder for body warmers.
実施例 ３
第６表は本実施例のカイロ用鉄粉の主原料である鋳物用
銑鉄及び反応抑制剤であるアトマイズ鉄粉の化学成分を
示す。そして銑鉄については機械的粉砕によって一６０
メツシュの粒度に粉砕し、一方、鉄粉については水アト
マイズ法によって製造し、還元した粒度＋１００メツシ
ュの粗粉を使用した。上記粉砕銑７５．５！ｕ１％、鉄
粉２５．５重量％をそれぞれ混合し、各混合粉の３０ｇ
に、パーライト２゜５ｇ、活性炭４ｇ、 Ｎａｃ ｉｔ
Ｉｇ、水１３ｇ 、計５０．５ｇを使用して発熱特性
を実験調査した。Example 3 Table 6 shows the chemical components of foundry pig iron, which is the main raw material for iron powder for body warmers, and atomized iron powder, which is a reaction inhibitor, in this example. and for pig iron, by mechanical crushing 160
The iron powder was pulverized to a mesh particle size, and the iron powder was produced by a water atomization method and reduced to a coarse powder with a particle size of +100 mesh. The above crushed pig iron is 75.5! Mix u1% and iron powder 25.5% by weight, and 30g of each mixed powder
2.5 g of perlite, 4 g of activated carbon, Nac it
The exothermic characteristics were experimentally investigated using Ig and 13 g of water, a total of 50.5 g.
第６図は一ヒ記実験結果を示し、図中、Ｇ、Ｈはそれぞ
れ本実施例（粉砕銑７５重量％と鉄粉２５重量％の混合
粉、粉砕銑５０重量％と鉄粉５０重￥゛％との混合粉）
の特性、■は従来例の特性を示す０図からも明らかなよ
うに、本実施例の場合は立ち上がり速度が従来のものよ
り良好であり、かつそれ以後は従来例と同等の発熱特性
を有している。特に粉砕銑７５％の場合は立ら上がり直
後から長時間にわたって６０℃を保持している（特性曲
線Ｇ）。Figure 6 shows the experimental results described above. In the figure, G and H represent the present example (mixed powder of 75% by weight of pulverized pig iron and 25% by weight of iron powder, 50% by weight of pulverized pig iron and 50% by weight of iron powder).゛% mixed powder)
As is clear from Figure 0, which shows the characteristics of the conventional example, the rising speed of this example is better than that of the conventional example, and thereafter the heat generation characteristics are the same as those of the conventional example. are doing. In particular, in the case of 75% pulverized pig iron, the temperature is maintained at 60°C for a long period of time immediately after startup (characteristic curve G).
なお、上記第１．第２実施例では温度制御剤として合金
鋼、快削鋼粉の粗粉を使用したが、これに限らず他の鋼
種、例えば、第３実施例の如き純鉄を使用するようにし
てもよい。また上記第２実施例では温度制御剤を混合し
ているが、極寒冷地用として使用する場合には高温用と
して粉砕Ｂ銑をそのまま用いるようにすることも可能で
ある。In addition, the above 1. In the second embodiment, coarse powder of alloy steel and free-cutting steel powder was used as the temperature control agent, but the present invention is not limited to this, and other types of steel, for example, pure iron as in the third embodiment, may be used. . Further, in the second embodiment, a temperature control agent is mixed, but when the pig iron is used in extremely cold regions, it is also possible to use the pulverized B pig iron as it is for high temperature use.
以上のように、本発明に係るカイロ用鉄粉によれば、主
原料として銑鉄を使用するようにしたので、機械的粉砕
のみで所望粒度の粉体が得られ、これにより従来工程で
必要であった熱処理を省略でき、又温度制御剤として粗
粉を使用することができ、その結果大幅な低コスト化を
達成できる効果がある。As described above, according to the iron powder for body warmers according to the present invention, since pig iron is used as the main raw material, powder with the desired particle size can be obtained only by mechanical crushing, which is not necessary in the conventional process. The conventional heat treatment can be omitted, and coarse powder can be used as a temperature control agent, resulting in a significant cost reduction.
第１図は鉄粉を用いたカイロの構造の１例を示す断面図
、第２図及び第３図は本発明の第１実施例を説明するた
めの図で、第２図は第１実施例と従来例の立ち上がり時
間を示す特性図、第３図はＦ銑のみ１本実施例及び従来
例の酸化発熱特性を示す特性図、第４図及び第５図は本
発明の第２実施例を説明するための図で、第４図は第２
実施例と従来例の立ち上がり時間を示す特性図、第５図
はＢ銑のみ、第２実施例及び従来例の酸化発熱時ω
仁第６図は本発明の第３実施例及び従来例の酸化発熱特
性を示す図である。FIG. 1 is a sectional view showing an example of the structure of a body warmer using iron powder, FIGS. 2 and 3 are diagrams for explaining the first embodiment of the present invention, and FIG. Figure 3 is a characteristic diagram showing the rise time of the example and the conventional example. Figure 3 is a characteristic diagram showing the oxidation heat generation characteristics of the example and the conventional example. Figures 4 and 5 are the second example of the present invention. This is a diagram for explaining the
Characteristic diagrams showing the rise time of the embodiment and the conventional example. Fig. 5 shows the oxidation time of B pig only. FIG. 3 is a diagram showing heat generation characteristics.
Claims (5)
マイズ法により製造された鉄粉とを混合してなることを
特徴とするカイロ用鉄粉。(1) Iron powder for body warmers, which is made by mixing pulverized pig iron obtained by pulverizing pig iron by mechanical means and iron powder produced by an atomization method.
砕銑６０〜９０重量％と、粒度が−３５メッシュ〜＋６
０メッシュの粉からなるアトマイズ鋼粉１０〜４０重量
％とを混合してなることを特徴とする特許請求の範囲第
１項記載のカイロ用鉄粉。(2) 60 to 90% by weight of crushed pig iron containing 90% or more of powder with a particle size of -100 mesh and a particle size of -35 mesh to +6
The iron powder for body warmers according to claim 1, characterized in that it is mixed with 10 to 40% by weight of atomized steel powder consisting of 0 mesh powder.
０〜４０重量％とを混合したことを特徴とする特許請求
の範囲第２項記載のカイロ用鉄粉。(3) 60-80% by weight of crushed F pig iron and 2 atomized steel powder
The iron powder for body warmers according to claim 2, characterized in that the iron powder is mixed with 0 to 40% by weight.
造し還元後の快削鋼粉１０〜３０重量％とを混合したこ
とを特徴とする特許請求の範囲第２項記載のカイロ用鉄
粉。(4) A warmer according to claim 2, characterized in that 70 to 90% by weight of pulverized B pig iron is mixed with 10 to 30% by weight of free-cutting steel powder produced by water atomization and reduced. Iron powder.
と、粒度が＋１００メッシュの鉄粉２５〜５０重量％と
を混合してなることを特徴とする特許請求の範囲第１項
記載のカイロ用鉄粉。(5) 75-50% by weight of crushed pig iron with a particle size of -60 mesh
and 25 to 50% by weight of iron powder having a particle size of +100 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62007207A JPS63176401A (en) | 1987-01-13 | 1987-01-13 | Iron powder for body warmer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62007207A JPS63176401A (en) | 1987-01-13 | 1987-01-13 | Iron powder for body warmer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63176401A true JPS63176401A (en) | 1988-07-20 |
Family
ID=11659564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62007207A Pending JPS63176401A (en) | 1987-01-13 | 1987-01-13 | Iron powder for body warmer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63176401A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2006006646A1 (en) * | 2004-07-14 | 2008-05-01 | マイコール株式会社 | Active iron powder, exothermic composition and heating element |
-
1987
- 1987-01-13 JP JP62007207A patent/JPS63176401A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2006006646A1 (en) * | 2004-07-14 | 2008-05-01 | マイコール株式会社 | Active iron powder, exothermic composition and heating element |
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