JPS596335A - Refining of nonferrous metal or alloy preventing mixing of moisture - Google Patents
Refining of nonferrous metal or alloy preventing mixing of moistureInfo
- Publication number
- JPS596335A JPS596335A JP11564882A JP11564882A JPS596335A JP S596335 A JPS596335 A JP S596335A JP 11564882 A JP11564882 A JP 11564882A JP 11564882 A JP11564882 A JP 11564882A JP S596335 A JPS596335 A JP S596335A
- Authority
- JP
- Japan
- Prior art keywords
- moisture
- molten metal
- nitrogen
- refining
- flux
- 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.)
- Granted
Links
- 239000002184 metal Substances 0.000 title claims abstract description 63
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 62
- 238000007670 refining Methods 0.000 title claims description 32
- 229910045601 alloy Inorganic materials 0.000 title description 4
- 239000000956 alloy Substances 0.000 title description 4
- 238000000034 method Methods 0.000 claims abstract description 37
- 229910021652 non-ferrous alloy Inorganic materials 0.000 claims abstract description 11
- 239000011261 inert gas Substances 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 11
- -1 ferrous metals Chemical class 0.000 claims description 8
- 150000002739 metals Chemical class 0.000 claims description 7
- 150000004820 halides Chemical class 0.000 claims description 3
- 230000004907 flux Effects 0.000 abstract description 17
- 239000002274 desiccant Substances 0.000 abstract description 7
- 230000006866 deterioration Effects 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract 1
- 229910001092 metal group alloy Inorganic materials 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 81
- 229910052757 nitrogen Inorganic materials 0.000 description 39
- 230000000694 effects Effects 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 230000007547 defect Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 5
- 238000007872 degassing Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 238000007791 dehumidification Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 235000011089 carbon dioxide Nutrition 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 3
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- UHXUZOCRWCRNSJ-QPJJXVBHSA-N methomyl Chemical compound CNC(=O)O\N=C(/C)SC UHXUZOCRWCRNSJ-QPJJXVBHSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- MGQIWUQTCOJGJU-UHFFFAOYSA-N [AlH3].Cl Chemical compound [AlH3].Cl MGQIWUQTCOJGJU-UHFFFAOYSA-N 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 102200021395 rs3739168 Human genes 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000006163 transport media Substances 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は水分の混入を防止した非鉄金属及び非鉄合金溶
湯精錬法に関し、さらに詳しくは、含有水分の低いフラ
ックスを含有水分の低い不活性ガスにより非鉄金属及び
非鉄台の溶湯に吹込むことにより溶湯に及ぼす水分の悪
影響を排除した水分の混入を防止した非鉄金属及び非鉄
合金の溶湯精錬法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for refining molten nonferrous metals and nonferrous alloys that prevents the contamination of moisture, and more specifically, a method for refining nonferrous metals and nonferrous alloys by using a flux with a low moisture content and an inert gas with a low moisture content. This invention relates to a molten metal refining method for nonferrous metals and nonferrous alloys that eliminates the adverse effects of moisture on the molten metal and prevents moisture from entering the molten metal.
〜・殻に、非鉄金属及び非鉄合金の溶湯は、装入原料や
溶解」二程中に混入したり、又は、新しく生成される酸
化物、大気中より吸入されるガス等により汚染され、そ
の後の圧延等の加工を受けた製品には線状欠陥、ピンホ
ール等各種の欠陥が発生することがある。~ Molten nonferrous metals and nonferrous alloys are mixed into the charging raw materials or during the melting process, or are contaminated by newly generated oxides, gases inhaled from the atmosphere, etc., and then Products that have undergone processing such as rolling may have various defects such as linear defects and pinholes.
しかして、製品におけるこのような種々の欠陥を防止す
るために、従来よりフラックスを不活性ガスにより輸送
して非鉄金属及び非鉄合金の溶？Ｉｌこ同時に吹込むこ
とによって、溶湯中の不純介在物やガスを除去する溶湯
精錬法が実施されてきている。In order to prevent such various defects in products, flux has traditionally been transported using an inert gas to melt non-ferrous metals and non-ferrous alloys. A molten metal refining method has been implemented in which impurity inclusions and gases in the molten metal are removed by simultaneously blowing Il into the molten metal.
しかしながら、この７ランクスー不活性〃ス同時吹込み
による溶湯精錬法は、実際操業において経験的に理論的
反応値程には脱ガスが進行していないことが知られてい
る。However, in the molten metal refining method using the simultaneous injection of 7-rank inert gas, it is known from experience that degassing does not progress as much as the theoretical reaction value in actual operation.
このように、溶湯において脱ガス反応か進行しない原因
について本発明者が実験研究を重ねた結果、７ランク又
と不活性ガス中に含有される水分にあることを知見した
。As a result of repeated experimental studies by the present inventor regarding the reason why the degassing reaction does not proceed in the molten metal, it has been found that the reason is the moisture contained in the inert gas.
即ち、ブラック又輸送用の不活性ガス（窒素、アルゴン
等）、例えば、高純度窒素力゛ス中には用いた容器の影
響により１〜４ＩＩ１ｇ／ｌ、工業用窒素ガス中にはそ
の配管等の影響により約１３ ｍＢ／ Ｉの水分が含有
されているものであり、このように多量の水分を含有し
ている窒素ガスを７ラツクスの輸送媒体として溶湯精錬
に使用すると、精錬後の溶湯にＨ２Ｃの分解により発生
したＨ２が吸収されて脱ガス効果が低下する。また、１
■２０の分解により発生した０２は溶湯中に酸化物を生
成させて精錬効果が低下する。従って、比較的多量に水
分を含有する不活性ガスを輸送媒体として７ラツクスを
同時に溶湯に吹込む精錬工程では、含有水分によ：）脱
ガス効果が不充分であり、がっ、脱酸化物効果も不充分
であるといえる。That is, black or inert gas for transportation (nitrogen, argon, etc.), for example, 1 to 4 II 1 g/l depending on the container used during high-purity nitrogen gas, and the piping etc. for industrial nitrogen gas. It contains approximately 13 mB/I of water due to the influence of water, and if nitrogen gas containing such a large amount of water is used as a transportation medium for molten metal refining, the molten metal after refining will have a H2 generated by the decomposition of H2C is absorbed, reducing the degassing effect. Also, 1
(2) The 02 generated by the decomposition of 20 forms oxides in the molten metal, reducing the refining effect. Therefore, in the refining process in which 7 lux is simultaneously blown into the molten metal using an inert gas containing a relatively large amount of moisture as a transport medium, the degassing effect is insufficient due to the moisture content, and the deoxidation effect is insufficient. It can also be said that the effects are insufficient.
上記の説明は、不活性ガスの含有水分が直接に溶湯に影
響を与えて溶湯品質の低下を生しる場合であるが、間接
的にも悪影響を与えるのである。The above explanation deals with the case where the moisture contained in the inert gas directly affects the molten metal and causes a deterioration in the quality of the molten metal, but it also has an adverse effect indirectly.
即ち、非鉄金属（金合金）溶湯、例えば、アルミニウム
溶湯精錬に優れた効果を有するとされている塩素ガス（
Ｃ１０、含弗素ガス）を発生させる７ランクスが配合さ
れているが、７ランクスが加熱分解されアルミニウム溶
湯ｉα１ｉｉｊにおいて塩素力スは、直ちに不活性ガス
中の水分と反応して塩化水素ガスとなり、アルミニウム
溶湯には塩化水素力又が吹込まれ、そして、この塩化水
素はアルミニウム溶湯中で−・部は分解してｔｌ、を発
生し、上記したと同様に溶湯汚染の原因となる。また、
本発明者の実験によれば、アルミニウム溶湯直前では７
ラソクス＋不活性ガス中の精錬に有効な塩素ガス量は塩
化水素量の５０ （Ｊ〜５旧月）分の１程度で著しく少
量であることが明らかで上記の反応が起きていることを
証明している。That is, chlorine gas (
7Ranks, which generates C10, fluorine-containing gas), is blended, but when 7Ranks is thermally decomposed, the chlorine gas immediately reacts with the moisture in the inert gas and becomes hydrogen chloride gas in the molten aluminum iα1iij, and the aluminum Hydrogen chloride is blown into the molten metal, and this hydrogen chloride decomposes in the molten aluminum to generate tl, which causes contamination of the molten metal as described above. Also,
According to the inventor's experiments, just before molten aluminum, 7
It is clear that the amount of chlorine gas effective for refining in Lasox + inert gas is extremely small, about 1/50 (J ~ 5 old months) of the amount of hydrogen chloride, which proves that the above reaction is occurring. are doing.
以上、不活性ガスに含有されている水分について説明し
たが、不活性ガスにより溶湯に同時に吹込れるフラック
スに含有される水分についても、この水分の分解によっ
て溶湯に与える影響は不活性ガス中の水分の悪影響と同
様である。The moisture contained in the inert gas has been explained above, but regarding the moisture contained in the flux that is simultaneously blown into the molten metal by the inert gas, the decomposition of this moisture will have an effect on the molten metal. This is similar to the negative effects of
従って、溶湯に対する水分の悪影響は、不活性ガス中の
含有水分と７ラツクスの含有水分とがプラスされたもの
となり、溶湯品質に与える影響は甚大なるものがある。Therefore, the adverse effect of moisture on the molten metal is the sum of the moisture contained in the inert gas and the moisture contained in 7 lux, and the influence on the quality of the molten metal is enormous.
本発明者は、上記に説明した従来における非鉄金属及び
非鉄合金の溶湯の７ラツクス一不活性ガス同時吹込によ
る精錬に際しての数々の問題点及び本発明者の研究の結
果の知見に鑑み、精錬される溶湯の脱ガス及び脱介在物
の夫々の効果を向上させるには、溶湯精錬法としてフラ
ックスー不活性ガス同時吹込み法における不活性ガス中
の含有水分及び７ラツクスの含有水分を極めて低くして
、これらの水分の熱分解により発生するＨ２及び０２の
上記した直接的及び間接的に溶湯中に混入するのを防止
することが有効であることがわかったのである。In view of the numerous problems encountered in the conventional refining of molten non-ferrous metals and non-ferrous alloys by simultaneous injection of 7 lux and inert gas as explained above, and the knowledge of the results of the inventor's research, In order to improve the respective effects of degassing the molten metal and removing inclusions, it is necessary to extremely reduce the moisture content in the inert gas and the moisture content of 7 lux in the flux-inert gas simultaneous injection method as a molten metal refining method. It has been found that it is effective to prevent the above-mentioned direct and indirect contamination of H2 and O2 generated by thermal decomposition of water into the molten metal.
本発明は、上記説明した従来技術、本発明者の知見に基
いてなされたもので、非鉄金属、非鉄合金の溶湯精錬に
おいて、７ラツクスー不活性ガス同時吹込み法を使用す
る場合の精錬反応性の向−にを目的としたものであって
、その特徴とするところは、ハロゲン化物を含有する７
ラツクスを１て活性ガスによって非鉄金属及び非鉄合金
の溶湯に吹込んで精錬するに当り、ハロゲン化物を含む
７ラツクスの含有水分及びイで活性ガスの含有水分の合
旧で、フラックス・不活性ガス混合体１１あたり３．４
ｍ８／以下となるように除去した後吹込むことにある。The present invention has been made based on the prior art described above and the knowledge of the present inventor, and is based on the refining reactivity when using the 7 lac inert gas simultaneous injection method in molten metal refining of non-ferrous metals and non-ferrous alloys. It is aimed at
When refining the molten metal of non-ferrous metals and non-ferrous alloys by injecting the active gas into the molten metal, the flux and inert gas are mixed by combining the moisture content of the 7 lux containing halides and the active gas. 3.4 per body 11
The purpose is to remove it so that it is less than m8/m and then blow it in.
以下本発明に係る水分の混入を防止した非鉄金属及び合
金溶湯精錬法（以Ｆ本発明に係る精錬法ということがあ
る。）について具体的に説明する。The method for refining molten nonferrous metals and alloys that prevents moisture from entering according to the present invention (hereinafter sometimes referred to as the refining method according to the present invention) will be specifically described below.
なお、非鉄金属及び合金はアルミニウム、不活性ガスは
窒素、ヘリウム、アルゴン等のうち窒素をイ列として以
下説明する。Note that the following description will be made assuming that non-ferrous metals and alloys are aluminum, and inert gas is nitrogen, helium, argon, etc., with nitrogen in series A.
本発明に係る精錬法において、アルミニウム溶湯に同時
に吹込むフラックスと窒素の合８１の含有水分を７ラツ
クス・窒素力゛ス混合体１１あたり３ 、４ ｒｎｇ／
ｌ以下とするのは、上記したところでもあるが、フラ
ックスと窒素中に含有されている水分は、
■］２０ → Ｈ２＋ ０２
と分解し、さらに、７ラツクスの塩素（弗素）はＣＩ２
＋ Ｈ２Ｏ−＋ ＨＣＩ ＋ Ｏ。In the refining method according to the present invention, the moisture content of the flux and nitrogen that are simultaneously blown into the molten aluminum is 7 lux/3.4 rng/11 of the nitrogen power mixture.
As mentioned above, the water contained in the flux and nitrogen decomposes as follows.
+H2O−+HCI+O.
の反応を起し、溶湯中においては、
ＨＣＩ ＋ ０２ → Ｈ２＋ Ｃ１２＋０２ＨＣ
ｌ → １−Ｉ２＋ Ｃｌ２
ＨＣＩ ＋ Ａｌ → Ａ Ｉ Ｃｌ
３＋ ）（２と分解して、溶湯中にＨ２及び０２と
して存在し、０２は溶湯との反応により酸化物を生成す
る。The reaction occurs, and in the molten metal, HCI + 02 → H2+ C12+02HC
l → 1-I2+ Cl2 HCI + Al → A I Cl
3+ )(2) and exists in the molten metal as H2 and 02, and 02 produces oxides by reaction with the molten metal.
そして、フラックスと窒素中の含有水分量と精錬終了後
の溶湯中のトＩ２量との関係を第１図に示す。この場合
の条件は次の通りである。FIG. 1 shows the relationship between the amount of water contained in the flux and nitrogen and the amount of I2 in the molten metal after completion of refining. The conditions in this case are as follows.
溶湯品種 ： ５０５２、 ２（）し７ランクス
：ＪＤＲ９４６Ｂ ２０ｋｓ吹込条件 ：
溶湯温度 ７６・（）°Ｃ吹込量 １ ｋｇ／分
〃ス量 ５０（１１／分
（８２量測定はテレガス法によった。）この第１図から
明らかであるが、７ラノクス＋窒素の含有水分の合計が
、７ラツクス・窒素混合体１１あたり３．４ｍｇ／Ｉ以
ｔζで゛は、溶湯中のＩＩ２量は殆スフと低下せず略一
定値、即ち、（，１，２ｃｃ／１００ｇＡｌとなってい
る。Molten metal type: 5052, 2() and 7 ranks: JDR946B 20ks Blowing conditions:
Molten metal temperature: 76・()°C Blow rate: 1 kg/min. Gas amount: 50 (11/min. (82 amount was measured by telegas method.) As is clear from this figure 1, the content of 7 lanox + nitrogen. When the total water content is less than 3.4 mg/I per 7 lux/nitrogen mixture 11, the amount of II2 in the molten metal does not drop to a nearly constant value, i.e., (1,2 cc/100 g Al). It has become.
また、０□の影響についてｌ−１２０含有量の異なる７
ラノクス＋窒素を用いて精錬を行なった後、この溶湯よ
り鋳塊を作成し、圧延して板を製造腰板表面に存利する
酸化物欠陥の発生を調べた結果は第２図に示す通りであ
る。この場合の精錬条件は第１図の説明と同じである。In addition, regarding the influence of 0□, 7 with different l-120 content
After refining using Lanox + nitrogen, an ingot was created from this molten metal and rolled to produce a board.The results of investigating the occurrence of oxide defects on the surface of the wainscoting board are shown in Figure 2. be. The refining conditions in this case are the same as those described in FIG.
また、圧延条件は熱間圧延及び冷開圧延により４ （’
） （ｌ ｍｍ）のちのを３齢りとした。In addition, the rolling conditions were 4 ('
) (l mm) Later, the third instar was established.
この第２図より明らかであるが、酸化物欠陥についても
」二記したＩ−１，と同様に７ラソクス＋窒素中の）１
２０含有量が、７ラツクス・窒素混合体ＩＩあたり３．
４ｍｇ以下では極めて優れた効果を示していることがわ
かる。As is clear from this Figure 2, regarding oxide defects as well, 7 rasox + 1 in nitrogen, similar to I-1 mentioned above.
20 content per 7 lux/nitrogen mixture II.
It can be seen that a dose of 4 mg or less shows extremely excellent effects.
以−ト説明したように、本発明に係る精錬法においては
、溶湯に同時に吹込む７ラツクス十窒素の含有水分の合
計で３ 、４ ｍｇ／ ｌ以下としなければ有効な精錬
結果が得られないことは明らかである。As explained above, in the refining method according to the present invention, effective refining results cannot be obtained unless the total moisture content of the 7 lux denitrogen simultaneously blown into the molten metal is 3.4 mg/l or less. That is clear.
次に、本発明に係る精錬法において使用する７ランク又
と窒素との水分の除去について説明する。しかして、７
ラツク又と窒素との水分を別々に除湿してから混合して
溶湯に吹込む場合と、フラックスと窒素との混合したも
のを同時に除湿して吹込む場合とがあり、以下、７ラツ
クスと窒素とを別々に除湿する場合と、（７ラツクス十
窒素）を同時に除湿する場合とについて説明する。Next, the removal of moisture between the seven ranks and nitrogen used in the refining method according to the present invention will be explained. However, 7
There are cases where the moisture of flux and nitrogen are dehumidified separately and then mixed and blown into the molten metal, and cases where a mixture of flux and nitrogen is simultaneously dehumidified and blown into the molten metal. We will explain the case of dehumidifying (7 lux ten nitrogen) separately and the case of dehumidifying (7 lux tennitrogen) at the same time.
先づ、除湿法としては、（１）窒素、７ランクス及び窒
素＋７ランクスの温度を低下させて相同湿度を−Ｉ−昇
させることによって１１２０を液体として除去する方法
、（２）吸湿性に優れた化合物により水分を除去する方
法がある。First, the dehumidification methods include (1) a method in which 1120 is removed as a liquid by lowering the temperature of nitrogen, 7 ranks, and nitrogen + 7 ranks and raising the homologous humidity by -I-; (2) a method that removes 1120 as a liquid, There is a method of removing moisture using a chemical compound.
そして、−１−記（１）の方法においては、水分を７ラ
ノクス・窒素混合体１１あたり３．４ｍｇ以丁とするに
は、−５９℃以下にする必要があり、市販の空気等気体
除湿用冷凍機では一２０’Ｃ（＝１近が限度であるので
、液体窒素等の冷媒を使用することがよく、また、（２
）の方法では、水分を７ラツクス・窒素；Ｒ合体１１あ
たり３ 、４ ｍｇ／ ｌ以下とする乾燥剤としては、
Ｐ ２０ Ｓ、Ｍｇ（ＣＩＯｌ）２、Ｋ Ｏト（、Ａ
Ｉ ２（’） 、、ｌ’ｔ４ ｇＯ等を使用するのがよ
い。さらに、この（１）と（２）の２つの方法を組合せ
てもよく、また乾燥剤の２種以」二の使用も有効である
。この両方法とも除湿されるべき窒素、７ランクスとは
充分に接触面積を広く接触させ、がっ、接触時間を可能
な限り長くすることが望ましい。In the method described in -1- (1), in order to reduce the moisture content to at least 3.4 mg per 7 Ranox/nitrogen mixture 11, it is necessary to lower the temperature to -59°C or lower, and use a commercially available gas dehumidifier such as air. For commercial refrigerators, the limit is around -20'C (=1), so it is best to use a refrigerant such as liquid nitrogen;
) method, the desiccant to reduce the moisture content to 7 lux/nitrogen; 3.4 mg/l or less per R combined 11 is as follows:
P20S, Mg(CIOl)2, KOto(,A
It is preferable to use I 2(') , , l't4 gO, etc. Furthermore, these two methods (1) and (2) may be combined, and it is also effective to use two or more types of desiccant. In both of these methods, it is desirable to have a sufficiently wide contact area with the nitrogen to be dehumidified, and to make the contact time as long as possible.
（１）窒素中の水分の除去法。(1) Method for removing moisture from nitrogen.
（イ）−５９℃以下とするために、エチルアルコール＋
ドライアイス（−７２°Ｃ）、エチルエーテル＋ドライ
アイス（−７７°Ｃ）を使用腰ガス体としては液体窒素
を使用する。即ち、エチルアルコール１＋ドライアイス
０．３（何れも容積）の寒剤中に設けられた熱交換管に
、水分が１０ ｍｇ／ ｌの窒素を０．２ｋｇ／ｃｍ２
の圧力で１００１／分の流速で通過させると、除湿後０
．１）１ｍｇ以下の１４２０となっていた。生成ドレン
は適宜抜取ればよい。(a) Ethyl alcohol +
Dry ice (-72°C) and ethyl ether + dry ice (-77°C) are used. Liquid nitrogen is used as the gas. That is, 0.2 kg/cm2 of nitrogen with a water content of 10 mg/l was added to a heat exchange tube installed in a cryogen containing 1 ethyl alcohol + 0.3 dry ice (both by volume).
When passed at a flow rate of 1001/min at a pressure of
．． 1) It was 1420, which is less than 1 mg. The generated drain may be extracted as appropriate.
（ロ）吸湿性に優れた化合物を使用し、即ち、乾燥剤を
窒素との接触面積を広くするとともに窒素との抵抗を少
なくするようにして通気性の良好な状態とし、乾燥剤と
してＰ２Ｏ，を使用し水分が１０ｍｇの窒素を流量５０
１／分、圧力０ 、２ ｋｇ／ｃ ｍ ２で窒素を導入
すると除湿後はｌ−１２０は０．ｔ）１１以下となって
いた。(b) Use a compound with excellent hygroscopicity, that is, increase the contact area of the desiccant with nitrogen and reduce the resistance to nitrogen to provide good air permeability. using nitrogen with a moisture content of 10 mg at a flow rate of 50
When nitrogen is introduced at 1/min, pressure 0, 2 kg/cm2, the l-120 after dehumidification is 0. t) It was 11 or less.
（２）７ラツクス中の水分の除去法。(2) Method for removing moisture in 7lux.
（伺予め乾燥剤を入れた密閉容器中において除湿し、次
いで、１００℃以上及び７ラツク又の分解開始温度以下
の温度に加熱する。(The product is dehumidified in a closed container containing a desiccant in advance, and then heated to a temperature of 100° C. or higher and 7 degrees lower than the decomposition initiation temperature.
（ロ）あらかしめ乾燥剤を入れた密閉容器にて除湿する
。(b) Dehumidify in an airtight container containing a drying agent.
（ハ）］０（１”ｃ以−ト、７ランクスの分解開始温度
以下に加熱することにより除湿する。(c) Dehumidification is performed by heating to below the decomposition starting temperature of 0 (1"C or higher, 7 ranks).
これらの方法により１％以下の１１２０とすることがで
きる。By using these methods, it is possible to achieve 1120 of 1% or less.
（３）（フラックス十窒素）混合物の水分の除去法。(3) Method for removing moisture from (flux ten nitrogen) mixture.
乾燥剤による除湿機能を有する空間、例えば、フラック
スタンク以後の吹込みパイプを通過させて除湿する。The desiccant is dehumidified by passing through a space that has a dehumidifying function, for example, a blowing pipe after the flux tank.
上記したような除湿法により窒素、７ラツクス、窒素＋
７ランク大中の水分を、７ラツクスと窒素とを同時に吹
込む際に、フラックス・窒素混合体１１あたり３ 、４
ｍｇ／ ｌ以下とするのである。Nitrogen, 7 lux, nitrogen +
When blowing 7-rank medium-sized moisture with 7 lux and nitrogen at the same time, 3, 4 per 11 of the flux/nitrogen mixture
It should be below mg/l.
本発明に係る精錬法の実施例を従来法と比郭して説明す
る。An embodiment of the refining method according to the present invention will be explained in comparison with a conventional method.
実施例
上記説明した除湿法により、７ランクス＋窒素の水分含
有量を合計で、７ラツクス・窒素混合体１１あな’）
３ 、４． ｍｇ／ ｌ以下としてから、７ラツクス士
不活性ガス同時吹込み法によるアルミニウム溶湯精錬を
実施しｔこ。Example: By the dehumidification method described above, a total moisture content of 7 lux + nitrogen is 7 lux/nitrogen mixture (11 ana').
3, 4. After reducing the content to less than mg/l, the molten aluminum was refined using a 7 lux inert gas simultaneous injection method.
次表に実施条件及び結果について示す。The following table shows the implementation conditions and results.
第３図に（フラックス十窒素）水分合計と実施例と比較
例との判定について示してあり、本発明に係る精錬法の
優れていることがわかる。FIG. 3 shows the total water content (flux 10 nitrogen) and the determination of the examples and comparative examples, and it can be seen that the refining method according to the present invention is superior.
本発明に係る精錬法は従来法に比して、フラックス＋窒
素の水分含有量が合計で、７ランクス・窒素混合体１１
あたり３ 、４ ｔｎｇ／ ｌ以下であるので溶湯中の
８２量も極めて少なく、また、品質も良好であるという
優れた効果を有していることがわかる。Compared to the conventional method, the refining method according to the present invention has a total moisture content of 7 ranks/nitrogen mixture 11
Since it is less than 3.4 tng/l, the amount of 82 in the molten metal is extremely small, and it can be seen that it has excellent effects in that the quality is also good.
以−１−説明したように、本発明に係る水分の混入を防
止した非鉄金属及びその合金溶湯精錬法は、上記の構成
を有しているものであるが呟溶湯中の１１２は着しく低
いので溶湯品質が向上し、さらに、以後の真空脱ガスの
処理時間が短縮で外、がっ、フィルタ一工程の簡略及び
製品品質の向−１二か図れるという優れた効果を奏する
ものである。As explained below-1-, the method for refining molten nonferrous metals and alloys thereof that prevents moisture from entering according to the present invention has the above-mentioned structure, but the 112 content in the molten metal is considerably low. Therefore, the quality of the molten metal is improved, and furthermore, the processing time for subsequent vacuum degassing is shortened, which has the excellent effect of simplifying the filter step and improving product quality.
第１図は（７ラツクス士窒素）水分合計量と溶湯中のＩ
−ｊ 、量の関係を示す図、第２図は（７ラツクス十窒
素）水分合計量と製品単位面積あたりの欠陥を示す図、
第３図は本発明に係る精錬法と比較例との（７ラツクス
十窒素）水分合計量と判定との関係を示す図である。Figure 1 shows the total amount of water (7 lux nitrogen) and the I content in the molten metal.
-j, a diagram showing the relationship between the amounts, Figure 2 is a diagram showing the total amount of moisture (7 lux tennitrogen) and defects per unit area of the product,
FIG. 3 is a diagram showing the relationship between the total amount of moisture (7 lux tennitrogen) and the determination for the refining method according to the present invention and a comparative example.
Claims (1)
て非鉄金属及び非鉄合金の溶湯に吹込んで精錬するに当
り、ハロゲン化物を含む７ランクスの含有水分及び不活
性ガスの含有水分の合計で、７ラツクス・不活性ガス混
合体１１あたり３．４ｍＨ／Ｉ以下となるように除去し
た後吹込むことを特徴とする水分の混入を防止した非鉄
金属及び非鉄合金溶湯精錬法。When refining 7Ranks containing halides by injecting it into molten nonferrous metals and nonferrous alloys using an inert gas, the total moisture content of 7Ranks containing halides and the moisture content of the inert gas is 7Rax. A molten metal refining method for non-ferrous metals and non-ferrous alloys that prevents moisture from being mixed in, characterized in that the inert gas mixture 11 is removed and then blown into the inert gas mixture so that the pressure becomes 3.4 mH/I or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11564882A JPS596335A (en) | 1982-07-03 | 1982-07-03 | Refining of nonferrous metal or alloy preventing mixing of moisture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11564882A JPS596335A (en) | 1982-07-03 | 1982-07-03 | Refining of nonferrous metal or alloy preventing mixing of moisture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS596335A true JPS596335A (en) | 1984-01-13 |
| JPS6133048B2 JPS6133048B2 (en) | 1986-07-31 |
Family
ID=14667834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11564882A Granted JPS596335A (en) | 1982-07-03 | 1982-07-03 | Refining of nonferrous metal or alloy preventing mixing of moisture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS596335A (en) |
-
1982
- 1982-07-03 JP JP11564882A patent/JPS596335A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6133048B2 (en) | 1986-07-31 |
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