CN100411775C - Molten metal treating agent, method of treating molten metal, apparatus and method for supplying covering gas for molten metal - Google Patents
Molten metal treating agent, method of treating molten metal, apparatus and method for supplying covering gas for molten metal Download PDFInfo
- Publication number
- CN100411775C CN100411775C CNB2004800050895A CN200480005089A CN100411775C CN 100411775 C CN100411775 C CN 100411775C CN B2004800050895 A CNB2004800050895 A CN B2004800050895A CN 200480005089 A CN200480005089 A CN 200480005089A CN 100411775 C CN100411775 C CN 100411775C
- Authority
- CN
- China
- Prior art keywords
- gas
- molten metal
- treating agent
- fluorinated ketone
- carbon dioxide
- 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.)
- Expired - Fee Related
Links
Images
Abstract
A molten metal treating agent which comprises a liquid mixture comprising liquefied carbon dioxide and, dissolved therein, 0.01 to 10 mass % of a fluoroketone. The molten metal treating agent is held in a vessel, is vaporized, and is fed as a covering gas for contacting with the surface of a molten metal.
Description
Technical field
The present invention relates to the oxidation of the motlten metal that obtains to prevent to make fusion such as magnesium, magnesium alloy or be evaporated to purpose and the molten metal treating agent of the blanketing gas (cover gas) that is used for contacting, motlten metal processing method, motlten metal with molten metal surface with the feedway and the method for blanketing gas.
This specification be based on Japan patent application (special be willing to 2003-53306 number, special be willing to 2003-324816 number, special be willing to 2003-390966 number, special be willing to 2004-13572 number, specially be willing to 2004-13573 number), the record content comprises in this manual as the part of this specification in this Japanese publication.
Background technology
When fusions such as making magnesium, magnesium alloy such as casting, for oxidation or the evaporation that prevents motlten metal, gas that will protection usefulness is as the atmosphere gas in the melting furnace.
This gas becomes the gas (blanketing gas) that covers motlten metal in melting furnace.
As above-mentioned blanketing gas, use sulfur hexafluoride is diluted the mist (for example, patent documentation 1) that obtains with bulk gas such as inert gases.
By using this mist, can reduce the oxygen concentration in the stove, prevent the oxidation (burning) of motlten metal.And then the tunicle that is made of the product of sulfur hexafluoride and metal (magnesium etc.) is formed at molten metal surface, so can prevent the evaporation of motlten metal.
Patent documentation 1: special table 2000-501653 communique
But the sulfur hexafluoride that uses in above-mentioned prior art is designated as greenhouse gases (greenhouse gas) (greenhouse effects coefficient: 23900), require substitute from the viewpoint of environmental preservation.
Summary of the invention
The invention that the present invention In view of the foregoing finishes just, its purpose is, a kind of oxidation that can prevent motlten metal or evaporation is provided and environment do not caused dysgenic molten metal treating agent, motlten metal processing method, motlten metal feedway and the method with blanketing gas.
Molten metal treating agent of the present invention is, is used for the molten metal treating agent of the blanketing gas that contacts with the surface of motlten metal, it is characterized in that, is that the liquefied mixture by the fluorinated ketone that has dissolved 0.2～7 quality % in liquid carbon dioxide constitutes.
Fluorinated ketone preferably from perfluorinated ketone, hydrofluorination ketone, and composition thereof select more than a kind.
When fluorinated ketone is perfluorinated ketone, preferably from CF
3CF
2C (O) CF (CF
3)
2, (CF
3)
2CFC (O) CF (CF
3)
2, CF
3(CF
2)
2C (O) CF (CF
3)
2, CF
3(CF
2)
3C (O) CF (CF
3)
2, CF
3(CF
2)
5C (O) CF
3, CF
3CF
2C (O) CF
2CF
2CF
3, CF
3C (O) CF (CF
3)
2, and from the perfluor cyclohexanone, select more than a kind.
When fluorinated ketone is hydrofluorination ketone, preferably from HCF
2CF
2C (O) CF (CF
3)
2, CF
3C (O) CH
2C (O) CF
3, C
2H
5C (O) CF (CF
3)
2, CF
2CF
2C (O) CH
3, (CF
3)
2CFC (O) CH
3, CF
3CF
2C (O) CHF
2, CF
3CF
2C (O) CH
2F, CF
3CF
2C (O) CH
2CF
3, CF
3CF
2C (O) CH
2CH
3, CF
3CF
2C (O) CH
2CHF
2, CF
3CF
2C (O) CH
2CHF
2, CF
3CF
2C (O) CH
2CH
2F, CF
3CF
2C (O) CHFCH
3, CF
3CF
2C (O) CHFCHF
2, CF
3CF
2C (O) CHFCH
2F, CF
3CF
2C (O) CF
2CH
3, CF
3CF
2C (O) CF
2CHF
2, CF
3CF
2C (O) CF
2CH
2F, (CF
3)
2CFC (O) CHF
2, (CF
3)
2CFC (O) CH
2F, CF
3CF (CH
2F) C (O) CHF
2, CF
3CF (CH
2F) C (O) CH
2F and CF
3CF (CH
2F) C (O) CF
3More than a kind of middle selection.
The preferred C of fluorinated ketone
3F
7(CO) C
2F
5
In the present invention, fluorinated ketone is meant the material that at least a portion of the hydrogen that contains in the ketone is replaced by fluorine.
Molten metal treating agent of the present invention can adopt with liquid condition and be filled into formation in the container.
Said vesse can have in the middle of the parts that contact at molten metal treating agent, at least the surface of the parts that are made of synthetic resin is by from neoprene, butyl rubber, fluorubber, ethylene propylene rubber, silicone rubber, acrylonitrile-butadiene rubber, special teflon (Teflon, registration mark), nylon, Delrin (Delrin, registration mark), the formation of selecting in the polytrifluorochloroethylene (Daiflon, registration mark) that forms more than a kind.
Motlten metal processing method of the present invention is characterised in that, the molten metal treating agent gasification that liquefied mixture by the fluorinated ketone that has dissolved 0.01～10 quality % in liquid carbon dioxide is formed just provides as the blanketing gas that contacts with the surface of motlten metal.
In the present invention, adopt method as described below, promptly, the molten metal treating agent that uses humidifier that the liquefied mixture by the fluorinated ketone that has dissolved 0.01～10 quality % in liquid carbon dioxide is formed atomizes, make the liquid carbon dioxide gasification simultaneously, this carbon dioxide is used propellant as spraying, vaporific fluorinated ketone is provided as the blanketing gas that contacts with the surface of motlten metal.
In above-mentioned motlten metal processing method, for fear of the fluorinated ketone concentration change of blanketing gas, can under liquid condition, from filling containers, take out above-mentioned inorganic agent, make its gasification and offer motlten metal as blanketing gas.
But, in the method, exist in the problem that active ingredient (fluorinated ketone) concentration of blanketing gas in the supply process of blanketing gas rises gradually.
In addition, go out liquid inorganic agent residual quantity in the filling containers because be difficult to from external detection, sometimes to derive almost all (below, being called whole liquid is derived) of liquid inorganic agent in the filling containers, thereby the gas of the gas phase portion in the filling containers is also derived.
For the gas of its gas phase portion, fluorinated ketone concentration is lower, so when directly used as blanketing gas, might be not enough to bring into play the effect of protection motlten metal.
In the present invention, In view of the foregoing, provide the motlten metal that to reach the purpose as described below feedway and the method for blanketing gas.
(1) suppresses the change of motlten metal with the active ingredient concentration of blanketing gas.
(2), prevent that also the fluorinated ketone concentration in the blanketing gas from reducing even under the situation that whole liquid of the inorganic agent in filling containers are derived.
Make with liquid carbon dioxide as gasification of the liquefied mixture inorganic agent of solvent and the process that provides as blanketing gas in, the problem that the active ingredient concentration of blanketing gas raises is gradually found by the inventor is initial.
What the inventor studied found that, the phenomenon that the fluorinated ketone concentration in the blanketing gas rises gradually is to be caused by reason as follows.
During the residual quantity of the inorganic agent in reducing filling containers, accompany therewith, the gas phase portion volume in the container increases, so the amount of vaporization of the inorganic agent in the container increases.In the process that this amount of vaporization increases, the liquid carbon dioxide that vapour pressure is significantly higher than fluorinated ketone preferentially gasifies, so the gas phase portion in container, gas concentration lwevel rises gradually, and in liquid phase portion, fluorinated ketone concentration rises gradually.For this reason, the fluorinated ketone concentration of gasifying gas rises gradually.
The present invention just is being based on the invention that above-mentioned viewpoint is finished, shown in it is constructed as follows.
Motlten metal of the present invention blanketing gas feedway, it is characterized in that possessing: the filling containers that the molten metal treating agent that is made of the liquefied mixture that contains liquid carbon dioxide and fluorinated ketone is filled, make the gasification of described molten metal treating agent and obtain the gasifier of gasifying gas, adjust the gasifying gas flow rate regulating valve of the flow of gasifying gas, bulk gas supply unit as the supply source of bulk gas, detect the concentration testing agency of the fluorinated ketone concentration of the blanketing gas that above-mentioned gasifying gas and bulk gas is mixed and obtain, adjust the aperture of above-mentioned gasifying gas flow rate regulating valve according to the detected value of this concentration testing agency and control the control part of the flow of gasifying gas thus.
Feedway of the present invention, can possess the pressure constant that makes gasifying gas the gasifying gas pressure regulator, make the pressure constant of bulk gas the bulk gas pressure regulator, adjust the blanketing gas flow rate regulating valve of the flow of blanketing gas.
Feedway of the present invention, can possess the pressure constant that makes gasifying gas the gasifying gas pressure regulator, make the pressure constant of bulk gas the bulk gas pressure regulator, adjust the bulk gas flow rate regulating valve of the flow of bulk gas.
Feedway of the present invention, it is characterized in that possessing: the filling containers that the molten metal treating agent that is made of the liquefied mixture that contains liquid carbon dioxide and fluorinated ketone is filled, adjust the inorganic agent flow rate regulating valve of the flow of above-mentioned molten metal treating agent, make the gasification of described molten metal treating agent and obtain the gasifier of gasifying gas, bulk gas supply unit as the supply source of bulk gas, detect the concentration testing agency of the fluorinated ketone concentration of the blanketing gas that above-mentioned gasifying gas and bulk gas is mixed and obtain, adjust the aperture of above-mentioned inorganic agent flow rate regulating valve according to the detected value of this concentration testing agency and control the control part of the flow of molten metal treating agent thus.
The motlten metal of the present invention feedway of blanketing gas, it is characterized in that possessing: the filling containers that the molten metal treating agent that is made of the liquefied mixture that contains liquid carbon dioxide and fluorinated ketone is filled, make the carbon dioxide of the molten metal treating agent in this filling containers become the supercritical gasification mechanism of supercriticality, as the bulk gas supply unit of the supply source of bulk gas, above-mentioned molten metal treating agent and bulk gas mixed and obtain the blender of blanketing gas.
The heating arrangements of the molten metal treating agent in the above-mentioned filling containers preferably heats in above-mentioned supercritical gasification mechanism.
Motlten metal of the present invention possesses the pressure regulator that the pressure of the molten metal treating agent that takes out from above-mentioned filling containers is adjusted with the feedway of blanketing gas, and above-mentioned supercritical gasification mechanism preferably can keep the supercriticality of carbon dioxide till molten metal treating agent arrives above-mentioned pressure regulator at least.
The motlten metal of the present invention supply method of blanketing gas, it is characterized in that, the gasifying gas and the bulk gas that the molten metal treating agent that is made of the liquefied mixture that contains liquid carbon dioxide and fluorinated ketone will be gasified and obtain are mixed, detect the fluorinated ketone concentration of the blanketing gas that obtains, control the flow of above-mentioned gasifying gas or molten metal treating agent according to its detected value.
The motlten metal of the present invention supply method of blanketing gas, it is characterized in that, in filling containers, make the carbon dioxide of the molten metal treating agent that constitutes by the liquefied mixture that contains liquid carbon dioxide and fluorinated ketone be in supercriticality, take out this molten metal treating agent and mix from above-mentioned filling containers then, the blanketing gas that obtains is offered motlten metal with bulk gas.
The fluorinated ketone concentration that contains in above-mentioned molten metal treating agent is preferably 0.1～20 quality %.
When the molten metal treating agent in the above-mentioned filling containers was in supercriticality, preferably making temperature was more than 31 ℃, and pressure is more than the 7.38MPa.
As above-mentioned fluorinated ketone, preferred pentafluoroethyl group-seven fluoropropyl ketone.
Description of drawings
Fig. 1 is the summary construction diagram for the treatment of apparatus that expression can be implemented an embodiment of motlten metal processing method of the present invention.
Fig. 2 is the summary construction diagram for the treatment of apparatus that expression can be implemented other embodiments of motlten metal processing method of the present invention.
Fig. 3 is the summary construction diagram of an example of expression blanketing gas feedway of the present invention.
Fig. 4 is the curve map of expression result of the test.
Fig. 5 is the summary construction diagram of other examples of expression blanketing gas feedway of the present invention.
Fig. 6 is the Probability Structure figure of other examples of expression blanketing gas feedway of the present invention.
Fig. 7 is the curve map of expression result of the test.
Fig. 8 is the curve map of expression result of the test.
Fig. 9 is the curve map of expression result of the test.
Figure 10 is the curve map of expression result of the test.
The specific embodiment
Fig. 1 is the treating apparatus that expression can be implemented an embodiment of motlten metal processing method of the present invention.
Among Fig. 1, symbol 1 is the pressure vessel (filling containers) of having filled molten metal treating agent, symbol 2 is the evaporimeters that make the molten metal treating agent gasification, and symbol 3 is the flowmeters that detect the flow of molten metal treating agent, and symbol 4 is the melting furnaces that make the object metal melting.
In pressure vessel 1, be filled with the molten metal treating agent of liquid condition.
This molten metal treating agent is to be made of the liquefied mixture that has dissolved fluorinated ketone (fluorinatedketone) in liquid carbon dioxide.
Fluorinated ketone preferably from perfluorinated ketone, hydrofluorination ketone, and composition thereof select more than a kind.
As perfluorinated ketone, preferred carbon number is 5～9.
As perfluorinated ketone, preferably from CF
3CF
2C (O) CF (CF
3)
2, (CF
3)
2CFC (O) CF (CF
3)
2, CF
3(CF
2)
2C (O) CF (CF
3)
2, CF
3(CF
2)
3C (O) CF (CF
3)
2, CF
3(CF
2)
5C (O) CF
3, CF
3CF
2C (O) CF
2CF
2CF
3, CF
3C (O) CF (CF
3)
2, and the perfluor cyclohexanone in select more than a kind.That is, can use a kind in these materials, also can mix more than 2 kinds and use.
As hydrofluorination ketone, preferred carbon number is 4～7.
As hydrofluorination ketone, preferably from HCF
2CF
2C (O) CF (CF
3)
2, CF
3C (O) CH
2C (O) CF
3, C
2H
5C (O) CF (CF
3)
2, CF
2CF
2C (O) CH
3, (CF
3)
2CFC (O) CH
3, CF
3CF
2C (O) CHF
2, CF
3CF
2C (O) CH
2F, CF
3CF
2C (O) CH
2CF
3, CF
3CF
2C (O) CH
2CH
3, CF
3CF
2C (O) CH
2CHF
2, CF
3CF
2C (O) CH
2CHF
2, CF
3CF
2C (O) CH
2CH
2F, CF
3CF
2C (O) CHFCH
3, CF
3CF
2C (O) CHFCHF
2, CF
3CF
2C (O) CHFCH
2F, CF
3CF
2C (O) CF
2CH
3, CF
3CF
2C (O) CF
2CHF
2, CF
3CF
2C (O) CF
2CH
2F, (CF
3)
2CFC (O) CHF
2, (CF
3)
2CFC (O) CH
2F, CF
3CF (CH
2F) C (O) CHF
2, CF
3CF (CH
2F) C (O) CH
2F and CF
3CF (CH
2F) C (O) CF
3More than a kind of middle selection.That is, can use wherein a kind, can also mix more than 2 kinds and use.
Wherein, especially preferably use pentafluoroethyl group-seven fluoropropyl ketone, promptly preferably use C
3F
7(CO) C
2F
5(CF for example
3CF
2C (O) CF (CF
3)
2, CF
3CF
2C (O) CF
2CF
2CF
3).
The molecular weight of fluorinated ketone is preferably more than 250 and (is preferably more than 300).By using the material of molecular weight, make the relative liquid carbon dioxide of fluorinated ketone in the molten metal treating agent even easily in this scope.
The number of the carbonyl that contains in the fluorinated ketone of 1 molecule is preferably 1.
The concentration of fluorinated ketone is set at 0.01～10 quality % (being preferably 0.05～5 quality %).By making fluorinated ketone concentration in this scope, in oxidation that prevents motlten metal reliably and evaporation, can suppress the generation of harmful substance.
When fluorinated ketone concentration during less than above-mentioned scope, forming of the tunicle that is made of the product of fluorinated ketone and motlten metal (magnesium etc.) is abundant inadequately, causes the oxidation or the evaporation of motlten metal easily.When fluorinated ketone concentration surpasses above-mentioned scope, be easy to generate COF
2Etc. harmful substance.
Wherein, fluorinated ketone is liquid usually at normal temperatures.For this reason, for it is mixed in the carbon dioxide and be necessary to make its gasification.
The concentration of liquid carbon dioxide is preferably 90～99.99 quality % (being preferably 95～99.95 quality %).
Molten metal treating agent can also contain other compositions except containing liquid carbon dioxide and fluorinated ketone.
As other above-mentioned compositions, can enumerate oxygen (O
2).Oxygen (O
2) concentration (is preferably 0.6～10mL/L) for well with 0.4～10mL/L.By making oxygen (O
2) concentration in this scope, can suppress harmful substance (for example perfluoroisobutylene (PFIB), COF
2, HF etc.) generation, and can prevent the oxidation of motlten metal.
Fluorinated ketone can synthesize by the reaction of carboxylic acid fluoride and grignard reagent.
Also have, the molten metal treating agent of the liquid state that will fill in pressure vessel 1 is called the molten metal treating agent of putting into container.
As pressure vessel 1, can use the container of use in storage liquid carbon dioxide etc.
Usually, in pressure vessel 1, the synthetic resin material is used to the packing of valve.
When from pressure vessel 1, taking out molten metal treating agent, in the middle of the parts of molten metal treating agent contact, the parts (packaging material of valve etc.) that constitute by synthetic resin, preferably at least the surface by from neoprene, butyl rubber, fluorubber, ethylene propylene rubber, silicone rubber, acrylonitrile-butadiene rubber, special teflon (Teflon, registration mark), nylon, Delrin (Delrin, that registration mark), selects in the polytrifluorochloroethylene (Daiflon, registration mark) constitutes more than a kind.
They are the materials that are difficult to because of the fluorinated ketone deterioration, so by using these materials, the packing etc. of valve that prevents pressure vessel 1 is because of the fluorinated ketone deterioration, and can accurately determine supply flow rate.In addition, these materials not only can be used for the valve of pressure vessel 1 etc., can also be used for molten metal treating agent is provided to any parts of the system of melting furnace.
For molten metal treating agent being filled in the pressure vessel 1, preferably at first fluorinated ketone is offered pressure vessel 1, then liquid carbon dioxide is offered pressure vessel 1.
By the liquid carbon dioxide that after fluorinated ketone, provides the comparison volume to use, can be when liquid carbon dioxide be provided abundant mixes liquid carbon dioxide and fluorinated ketone and homogenising.
Then, the method for using said apparatus to handle motlten metal is described.
Metals such as magnesium, magnesium alloy are put into melting furnace 4, and heating makes its fusion.Temperature in the melting furnace 4 can be 600～800 ℃.
Molten metal treating agent with in the liquid condition taking-up pressure vessel 1 imports to and makes its gasification in the evaporimeter 2.
The gasiform molten metal treating agent that obtains is offered melting furnace 4 through flowmeter 3.Molten metal treating agent becomes and is full of in the melting furnace 4 and the atmosphere gas (blanketing gas) that contacts with molten metal surface.
The fluorinated ketone in the molten metal treating agent and the magnesium of fusion etc. react, and form by MgF on molten metal surface
2Deng the tunicle that constitutes.By this tunicle, can prevent the oxidation (burning) or the evaporation of motlten metal.
Motlten metal can wait by casting and form metal formed article.
Above-mentioned molten metal treating agent is that the liquefied mixture by the fluorinated ketone that has dissolved 0.01～10 quality % in liquid carbon dioxide constitutes.
Fluorinated ketone is a greenhouse effects effect material low, that decompose easily in atmosphere, so can prevent from environment is caused harmful effect.
In addition, because use the fluorinated ketone and the liquid carbon dioxide that are pre-mixed, so the fluorinated ketone that is provided by different system with mixing before be about to using and the situation of liquid carbon dioxide are compared, the mixing ratio that can make fluorinated ketone and liquid carbon dioxide reliably is constant.
For this reason, can determine to offer the fluorinated ketone concentration of the molten metal treating agent of melting furnace 4 accurately.Therefore, can prevent the oxidation or the evaporation of motlten metal reliably, and suppress harmful substance (COF
2Deng) generation.In addition, can realize cost degradation.
Relative therewith, provide fluorinated ketone and liquid carbon dioxide and during the method for when being about to use, they being mixed when adopting by different systems, the quantity delivered of fluorinated ketone is a trace, so be necessary its Flow-rate adjustment is carried out strict management, causes the rising of equipment costs such as precision pump.
Be mixed with a spot of fluorinated ketone and a large amount of liquid carbon dioxides in the above-mentioned molten metal treating agent, so even under the situation of leaking from pressure vessel 1, also can make the fluorinated ketone concentration in the gas leakage is below the permissible concentration, favourable aspect security.In addition, also preferred from the easy to handle viewpoint.
To this, providing under the situation of fluorinated ketone and liquid carbon dioxide with different system, because use the fluorinated ketone of high concentration, need be used to guarantee the equipment of security etc., relatively poor from the viewpoint of the property handled.
Fig. 2 is the treating apparatus that expression can be implemented other embodiments of motlten metal processing method of the present invention.
The treating apparatus here is not provided with evaporimeter 2.Supplying tubing is provided with spray nozzle 5 (humidifier), and is different with treating apparatus shown in Figure 1 in this.
Below, the method for using this device to handle motlten metal is described.
Atomize and offer melting furnace 4 with the molten metal treating agent in 5 pairs of pressure vessels of spray nozzle 1.At this moment, the liquid carbon dioxide generating gasification, the performance conduct makes the spraying of the mobile acceleration of the vaporific fluorinated ketone function of propellant, so vaporific fluorinated ketone effectively can be offered melting furnace 4.
Vaporific fluorinated ketone generating gasification, the mist of this fluorinated ketone and carbon dioxide become the atmosphere gas (blanketing gas) in the melting furnace 4.
According to this processing method, because molten metal treating agent is atomized and offer melting furnace 4, so molten metal treating agent gasifies easily with spray nozzle 5.
Therefore, the heat energy that needs in the time of can being suppressed at the gasification of molten metal treating agent is according to fluorinated ketone concentration also needs evaporimeter not.
Fig. 3 is the figure of an example of expression blanketing gas feedway of the present invention.
Among the figure, symbol 11 is filling containers of the pressure vessel that is filled as molten metal treating agent (below, be sometimes referred to as inorganic agent for the sake of simplicity).Symbol 12 is to make the gasification of above-mentioned inorganic agent and the gasifier that obtains gasifying gas.Symbol 13 is the gasifying gas pressure regulators that keep the pressure constant of gasifying gas.Symbol 14 is gasifying gas flow rate regulating valves of adjusting the flow of gasifying gas.Symbol 15 is the bulk gas supply units as the supply source of bulk gas.Symbol 16 is the bulk gas pressure regulators that keep the pressure constant of bulk gas.Symbol 17 is blenders that above-mentioned gasifying gas of mixing and bulk gas obtain blanketing gas.Symbol 18 is the densimeters (concentration testing agency) that detect the fluorinated ketone concentration of the blanketing gas that obtains by blender 17.Symbol 19 is the blanketing gas flowmeters that detect the flow of blanketing gas.Symbol 20 is blanketing gas flow rate regulating valves of adjusting the flow of blanketing gas.Symbol 21 is control parts of controlling the flow of above-mentioned gasifying gas according to the detected value of densimeter 18.Symbol 22 is the melting furnaces of accommodating motlten metal.
In filling containers 11, be filled with liquid molten metal treating agent.This inorganic agent is to be made of the liquefied mixture that has mixed fluorinated ketone in liquid carbon dioxide.As fluorinated ketone, can use above-mentioned material.
The concentration of the fluorinated ketone of inorganic agent preferably sets at 0.1～10 quality % (preferred 0.4～8 quality %) in the filling containers 11.
By making fluorinated ketone concentration in this scope, the fluorinated ketone concentration of the gas phase portion in the filling containers 11 that can fully raise.
For this reason; the roughly full dose of the inorganic agent of the liquid state in taking out filling containers 11 (below; be called and take out whole liquid) afterwards, the fluorinated ketone concentration of the gasifying gas that fully raises can prevent that the motlten metal of blanketing gas from protecting effect (preventing the effect of the oxidation and the evaporation of motlten metal) deficiency.In addition, can suppress the generation of harmful substance.
For example, be more than the 0.1 quality % by the fluorinated ketone concentration that makes inorganic agent, can make the fluorinated ketone concentration of taking out the blanketing gas behind whole liquid is more than the 50ppm.In addition, be more than the 0.4 quality % by the fluorinated ketone concentration that makes inorganic agent, can make the fluorinated ketone concentration of taking out the blanketing gas behind whole liquid is more than the 100ppm.Wherein, ppm is capacity benchmark (μ l/l).
When the concentration of fluorinated ketone during less than above-mentioned scope, might be after taking out whole liquid the fluorinated ketone concentration of blanketing gas reduce and do not have a sufficient motlten metal protection effect.
The advantage that has the exchange frequency of the high more container 11 of fluorinated ketone concentration to reduce more, but if surpass the value of above-mentioned scope, liquid carbon dioxide separates at pipe arrangement etc. easily with fluorinated ketone, the inorganic agent that is directed in the gasifier 12 becomes inhomogeneous, the easy change of fluorinated ketone concentration of blanketing gas.In addition, be easy to generate COF
2Etc. harmful substance.
The concentration of liquid carbon dioxide is preferably 90～99.99 quality % (being preferably 95～99.95 quality %).
Inorganic agent can also contain other compositions except containing liquid carbon dioxide and fluorinated ketone.
As other above-mentioned compositions, can enumerate oxygen (O
2).Oxygen (O
2) concentration (is preferably 0.6～10mL/L) for well with 0.4～10mL/L.
By making oxygen (O
2) concentration in this scope, can suppress harmful substance (for example perfluoroisobutylene (PFIB), COF
2, HF etc.) generation, and can prevent the oxidation of motlten metal.
Fluorinated ketone can synthesize by the reaction of carboxylic acid fluoride and grignard reagent.
Then, the method for using said apparatus blanketing gas to be offered melting furnace 22 is described.
Metals such as magnesium, magnesium alloy are put in the melting furnace 22, and heating makes its fusion.Temperature in the melting furnace 22 can be set at 600～800 ℃.
Near the delivery lines bottom of utilization arrival filling containers 11 etc. are by the inorganic agent of road in L1 takes out filling containers 11.
The fluorinated ketone that contains in the inorganic agent in the filling containers 11, its boiling point is higher than carbon dioxide, so the gas phase portion in container 11, the ratio of fluorinated ketone is lower than liquid phase portion.For this reason, when from filling containers 11 taking-up inorganic agents, be necessary to derive the liquid phase portion in the filling containers 11.
This inorganic agent imported to make its gasification in the gasifier 12, obtain gasifying gas.
In addition, in this manual,, all will be called gasifying gas from filling containers 11 through the gas of gasifier 12 no matter whether the inorganic agent that takes out is liquid.
After this gasifying gas being adjusted to the pressure of constant, it is imported in the blender 17 through flow rate regulating valve 14 with pressure regulator 13.
Simultaneously, after the bulk gas of autonomous agent gas supply part 15 is adjusted to the pressure of constant in the future with pressure regulator 16, through L2 it is imported in the blender 17 by the road.
As bulk gas, the active low and proportion of preferred reaction is greater than the gas of air.The big gas of preferred specific gravity why is because when proportion hour, because the ascending air that produces flows blanketing gas, protect the effect reduction of motlten metal melting furnace 22 in.
As bulk gas, in the middle of the preferably carbon dioxide, argon gas more than a kind.Wherein, as bulk gas, also can use air or nitrogen.
As blender 17, can use static mixer, also can use the simple arm that has connected the pipe arrangement that pipe arrangement that gasifying gas uses and bulk gas use.
The mist that obtains with blender 17 hybrid agent gases and gasifying gas, through densimeter 18, flowmeter 19, flow rate regulating valve 20, the blanketing gas as covering molten metal surface is provided for melting furnace 22 by the road through L3.
In order to obtain enough motlten metal protection effects, the fluorinated ketone concentration of blanketing gas is preferably 50ppm above (being preferably more than the 100ppm).
The fluorinated ketone concentration of blanketing gas is preferably 1000ppm following (it is following to be preferably 500ppm).By making fluorinated ketone in this scope, can suppress harmful substance (COF
2Deng) generation.
Offer the flow of the blanketing gas of melting furnace 22, can use traffic adjust the value that valve 20 settings become regulation.
During the residual quantity of the inorganic agent in reducing filling containers 11, accompany therewith, the gas phase portion volumes in the container 11 increase, so the increase of the amount of vaporization of the inorganic agent in the container 11.In the process that this amount of vaporization increases, compare the remarkable high liquid carbon dioxide of vapour pressure with fluorinated ketone and preferentially gasify, so the gas phase portion in container 11, gas concentration lwevel rises gradually, in liquid phase portion, fluorinated ketone concentration rises gradually.For this reason, the fluorinated ketone concentration of gasifying gas rises gradually.
Fig. 4 is the figure of an example of the variation of the fluorinated ketone concentration of expression when providing gasifying gas with 10 liters/minute, and in the example shown here, the fluorinated ketone concentration in the gasifying gas is about 250ppm when bringing into use, but rises gradually and reach about 330ppm.
As mentioned above, the gas that exists in the gas phase portion in container 11, its fluorinated ketone concentration is lower, so the fluorinated ketone concentration of gasifying gas is reduced to about 50ppm when carrying out the whole liquid of taking-up that symbol A represents.
After taking out whole liquid, because the pressure in the filling containers 11 reduce gradually, so can infer gas residual quantity in the filling containers 11 by its pressure.
By this supply method, detect the fluorinated ketone concentration of blanketing gas with densimeter 18, adjust the aperture of flow rate regulating valves 14 according to detected value by control part 21, control the flow of gasifying gas thus.
When the fluorinated ketone concentration of the gasifying gas in importing to blender 17 rose, the aperture that reduces flow rate regulating valve 14 according to ascensional range reduced the flow of gasifying gas, made time per unit import to fluorinated ketone amount constant in the blender 17.
Utilize the flow rate regulating valve 20 of blanketing gas, make the blanketing gas supply flow rate constant that is directed in the melting furnace 22, so when the flow of gasifying gas reduced, increased from the road through the bulk gas flow that L2 imports to the blender 17 this moment.
On the other hand, when the fluorinated ketone concentration of the gasifying gas in importing to blender 17 reduced, the aperture of adjusting valve 14 according to the amplitude of reduction augmented flow increased the flow of gasifying gas, and reduce from the road through the bulk gas flow that L2 imports to the blender 17 this moment.
For this reason, the fluorinated ketone concentration constant of the blanketing gas that is provided for melting furnace 22 can be made, stable motlten metal protection effect can be obtained.
After whole inorganic agent liquid in taking out filling containers 11, the gas in the filling containers 11 is derived through L1 through passing by on one's way.
As mentioned above, because the fluorinated ketone concentration of the inorganic agent in the filling containers 11 is set at above-mentioned scope (0.1～10 quality %), thereby the fluorinated ketone concentration of gas phase portion is enough high.
For this reason, the fluorinated ketone concentration of gasifying gas reduces significantly when taking out whole liquid, but can prevent the fluorinated ketone concentration deficiency of blanketing gas.
Offer the fluorinated ketone in the blanketing gas of melting furnace 22, and motlten metal (magnesium etc.) reacts, form by MgF at molten metal surface
2Deng the tunicle that constitutes.By this tunicle, can prevent the oxidation (burning) or the evaporation of motlten metal.
Motlten metal can wait by casting becomes metal formed article.
The feedway of above-mentioned blanketing gas has following effect.
(1) according to the flow of the detected value control gasifying gas of the fluorinated ketone concentration of blanketing gas, so can suppress to offer the change of fluorinated ketone concentration of the blanketing gas of melting furnace 22.
Therefore, can solve so-called that provide at blanketing gas that fluorinated ketone concentration rises gradually in the process, use and contain liquid carbon dioxide as the problem points under the liquid inorganic agent situation of solvent, can obtain stable motlten metal protection effect.
(2) because can suppress the change of the fluorinated ketone concentration of blanketing gas, thus the fluorinated ketone use amount can be suppressed, favourable aspect cost.
(3) because the control object is the flow of gasifying gas, so do not need the flow-control of bulk gas.For this reason, device is constituted and simplify the suppression equipment cost.
To this, under the situation of control gasifying gas and bulk gas both sides' flow, control part need have that to be used to make the total flow of gasifying gas and bulk gas be constant calculation function, so be disadvantageous on the equipment cost this point.
(4) concentration of the fluorinated ketone by making inorganic agent is 0.1～10 quality % (being preferably 0.4～8 quality %), can fully improve the fluorinated ketone concentration in the gas phase portion in the filling containers 11.
For this reason, the fluorinated ketone concentration of taking out whole liquid gasifying gas afterwards can be fully improved, the motlten metal protection effect deficiency of blanketing gas can be prevented.
In addition, after taking out whole liquid, also can utilize the gas phase portion filling containers 11 in fluorinated ketone and less than wasting, so favourable aspect cost.
(5) the fluorinated ketone concentration of blanketing gas is not based on the flow of blanketing gas and is based on the value of the flow of gasifying gas.For this reason, the formation that possesses gasifying gas pressure regulator 13, bulk gas pressure regulator 16, blanketing gas flow rate regulating valve 20, owing to the blanketing gas supply flow rate is set the value that becomes regulation by flow rate regulating valve 20, even thereby increase and decrease gasifying gas flow, also can make the bulk gas flow increase and decrease occur and eliminate its flow change.
Therefore, what are regardless of blanketing gas supply flow rate to melting furnace 22, can make the fluorinated ketone concentration constant of the blanketing gas that offers melting furnace 22.
(6) be above-mentioned scope by the fluorinated ketone concentration that makes inorganic agent, can fully improve the fluorinated ketone concentration of taking out the gasifying gas behind whole liquid, so after taking out whole liquid, also can continue to provide blanketing gas.
After taking out whole liquid,,, can infer the gas residual quantity in the filling containers thus so detect its pressure by being arranged on the pressure detecting mechanism (omitting diagram) of road on L1 because the pressure in the filling containers 11 reduces gradually.For this reason, the setting of the swap time of container 11 becomes easy.
(7) fluorinated ketone from because of decompose easily and the low viewpoint of saving environment from damage of greenhouse effects preferred.In addition, the greenhouse effects of carbon dioxide are low, environmental preservation is outstanding, and reactivity is low, so can not cause harmful effect to motlten metal.
In the present invention, also can serve as the control object with the flow of liquid inorganic agent.
For example, between filling containers 11 and gasifier 12, the inorganic agent flow rate regulating valve (omitting diagram) that the inorganic agent of above-mentioned liquid state is used can be set.
Under the situation of using this device, detect the fluorinated ketone concentration of blanketing gas with densimeter 18, adjust the inorganic agent flow rate regulating valve according to detected value and by control part 21, control the flow of inorganic agent thus, make the fluorinated ketone amount constant in the time per unit importing blender 17.
In this device, the same with said method, can prevent to offer the change of fluorinated ketone concentration of the blanketing gas of melting furnace 22.
Fig. 5 is the figure of other examples of expression feedway of the present invention.
This feedway does not possess the flowmeter 19 and the flow rate regulating valve 20 of blanketing gas, possesses bulk gas flowmeter 23 and bulk gas flow rate regulating valve 24 on L2 on the road, and is from this point, different with feedway shown in Figure 2.
In this device, can use traffic adjust the value that valve 24 becomes the flow set of bulk gas regulation.
Under the situation of using this device, the same with above-mentioned method, detect the fluorinated ketone concentration of blanketing gas with densimeter 18, also adjust the aperture of flow rate regulating valves 14 by control part 12 according to detected value, control the flow of gasifying gas thus, make time per unit import to fluorinated ketone amount constant in the blender 17.
In this device, make bulk gas flow constant by flow rate regulating valve 24, so under the sufficiently high situation of fluorinated ketone concentration of gasifying gas (for example 0.1～10 quality %), can prevent to offer the fluorinated ketone concentration change of the blanketing gas of melting furnace 22.
Fig. 6 is the figure of other examples of expression feedway of the present invention.
In the following description, about with Fig. 3 and the general parts of feedway shown in Figure 5, additional prosign simplifies or omits its explanation.
This feedway possesses filling containers 11, the heating arrangements (supercritical gasification mechanism) that heats the inorganic agent in the filling containers 11, gasifier 12, pressure regulator 13, flow rate regulating valve 14, measures flowmeter 26, bulk gas supply unit 15, bulk gas flowmeter 23, the bulk gas flow rate regulating valve 24 of the flow of gasifying gas.
This feedway is characterised in that to possess heating arrangements 25.
Heating arrangements 25 is used to make the carbon dioxide of the inorganic agent in the filling containers 11 to be in supercriticality.As heating arrangements 25, can the electrification formula, heater such as hot air type, hot bath formula.
The fluorinated ketone concentration that contains in the inorganic agent in filling containers 11 is preferably 0.1～20 quality % (being preferably 0.4～8 quality %).
By making fluorinated ketone concentration in this scope, can prevent the motlten metal protection effect deficiency of blanketing gas.In addition, can suppress the generation of harmful substance.
When fluorinated ketone concentration during less than above-mentioned scope, the fluorinated ketone concentration of taking out the blanketing gas behind whole liquid reduces, and motlten metal protection effect becomes insufficient easily.
When fluorinated ketone concentration surpassed above-mentioned scope, it is inhomogeneous that inorganic agent becomes, the easy change of fluorinated ketone concentration of blanketing gas.In addition, be easy to generate COF
2Etc. harmful substance.
By using the inorganic agent in the heating arrangements 25 heating filling containers 11, make the carbon dioxide of inorganic agent be in supercriticality.Carbon dioxide becomes supercritical gas (supercritical fluid) thus.
For the carbon dioxide that makes inorganic agent becomes supercriticality, preferably making the temperature in the filling containers is more than 31 ℃, and pressure is more than the 7.38MPa.
Become supercriticality by the carbon dioxide that makes inorganic agent, the inorganic agent in the filling containers 11 becomes the mixed uniformly state of each composition, and it is even that fluorinated ketone concentration becomes.For this reason, the fluorinated ketone concentration of gasifying gas can not rise gradually in the supply process.
Preferably by heating arrangements 25 abundant rising temperature and pressures, so that the inorganic agent of taking-up arrives the supercriticality of keeping carbon dioxide till the pressure regulator 13 at least from filling containers 11.Thus, can prevent the fluorinated ketone concentration change of blanketing gas under the state inorganic agent being offered pressure regulator 13 uniformly.
From filling containers 11, take out the inorganic agent that contains supercritical carbon dioxide, through gasifier 12, pressure regulator 13, flow rate regulating valve 14, flow with constant imports in the blender 17, bulk gas is imported in the blender 17 through L2 and with the flow of constant by the road simultaneously.
Hybrid agent gas and gasifying gas in blender 17 and the mist that obtains is provided for melting furnace 22 by the road through L3 as blanketing gas.
In this feedway, have and make inorganic agent become the heating arrangements 25 of supercriticality, so can make the fluorinated ketone concentration of the inorganic agent in the filling containers 11 become even.
For this reason, the fluorinated ketone concentration of gasifying gas can not rise gradually in the supply process, can prevent the fluorinated ketone concentration change of blanketing gas.
In addition, because the fluorinated ketone concentration of the inorganic agent in the filling containers 11 is homogenized, can not cause that the fluorinated ketone concentration when taking out whole liquid reduces.For this reason, can prevent the fluorinated ketone concentration change of blanketing gas.
And then, because there is no need to use control structure, so can the needed cost of restraining device.
In addition, in the present invention, inorganic agent can provide after gasification, can also offer melting furnace 22 with liquid state.
(embodiment 1)
In internal volume is the pressure vessel 1 of 10L, provide the pentafluoroethyl group-seven fluoropropyl ketone (C of 13g
3F
7(CO) C
2F
5), then fill the liquid carbon dioxide of 6kg and make interior pressure of container be 6kPa.
Derive molten metal treating agent in the pressure vessel 1 with 9g/ minute flow, make its gasification, and with infrared type fluon (flon) densimeter to C
3F
7(CO) C
2F
5Concentration carry out through the time measure.
Measurement result as shown in Figure 7.
Confirm to keep fluorinated ketone concentration constant by Fig. 7.
(embodiment 2)
Derive the molten metal treating agent that obtains at embodiment 1 with 9g/ minute flow from pressure vessel 1, make its gasification, and make the interior molten magnesium 3kg (680 ℃) of its contact steel crucibles (internal diameter 125mm, high 245mm, thick 5mm) 3 hours.
Its result confirms to form tunicle on the molten magnesium surface, and not burning of molten magnesium.
In order to compare, stop to provide molten metal treating agent, and replace the dry air that same traffic is provided, results verification molten magnesium surface catches fire.
(embodiment 3)
The test film of the O ring-type that will form by the material shown in the table 1, be immersed in embodiment 1 in the same molten metal treating agent of the molten metal treating agent that uses, the variation before and after research is soaked.
Wherein, the variation of hardness, weight, volume is to calculate according to value * 100 before (value before the value-test after the test)/test.
Table 1
(embodiment 4)
Use feedway shown in Figure 3, blanketing gas is offered melting furnace 22.
In internal volume is the filling containers 11 of 10L, fill pentafluoroethyl group-seven fluoropropyl ketone 510g, liquid carbon dioxide 7kg with pressure 6MPa, as inorganic agent.Use carbon dioxide as bulk gas.
When blanketing gas is provided, detect the fluorinated ketone concentration of blanketing gas with densimeter 18, also by the aperture of control part 21 adjustment flow rate regulating valves 14, the flow of control gasifying gas is so that time per unit is directed to the fluorinated ketone amount constant in the blender 17 according to detected value.Wherein, provide gasifying gas with 10 liters/minute.
Fig. 8 be expression gasifying gas and blanketing gas fluorinated ketone concentration through the time curve map that changes.
As shown in the drawing, even under the situation that the fluorinated ketone concentration of gasifying gas rises gradually, the fluorinated ketone concentration constant of blanketing gas.
When taking out whole liquid (symbol A), the fluorinated ketone concentration of gasifying gas sharply reduces, but can prevent that the fluorinated ketone concentration of blanketing gas from reducing significantly.
(embodiment 5)
Fig. 9 is the curve map of relation of the fluorinated ketone concentration (longitudinal axis) of the fluorinated ketone concentration (fluorinated ketone filling concentration) (transverse axis) of the inorganic agent in the expression filling containers 11 and the gasifying gas behind the whole liquid of taking-up.
According to this figure as can be known, be more than the 0.1 quality % by the filling concentration that makes fluorinated ketone, can make the fluorinated ketone concentration of taking out the gasifying gas behind whole liquid is more than the 50ppm.
(embodiment 6)
Use feedway shown in Figure 6, blanketing gas is offered melting furnace 22.
In the filling containers 11 of internal volume 10L, fill pentafluoroethyl group-seven fluoropropyl ketone 510g, liquid carbon dioxide 7kg with pressure 6MPa, as inorganic agent.
Use heating arrangements 25, the inorganic agent in the filling containers 11 is heated to 35 ℃.Pressure in the filling containers 11 is 8MPa.
Take out this inorganic agent from filling containers 11, the gasifying gas that will pass through gasifier 12 with the flow of constant offers blender 17, and the flow with constant offers blender 17 with bulk gas (carbon dioxide) simultaneously, and they are mixed.Wherein, gasifying gas provides with 10 liters/minute.
Fig. 8 be expression gasifying gas and blanketing gas fluorinated ketone concentration through the time curve map that changes.As shown in the drawing, the fluorinated ketone concentration constant of gasifying gas and blanketing gas.
Industrial application
The present invention brings into play effect as follows.
(1) molten metal treating agent of the present invention be by in liquid carbon dioxide, dissolved 0.01～The liquefied mixture of the fluorinated ketone of 10 quality % consists of.
Fluorinated ketone is that greenhouse effects are low and hold labile material in atmosphere, so can prevent ring Harmful effect is caused in the border.
(2) in motlten metal processing method of the present invention, because use the fluorinated ketone that is pre-mixed And liquid carbon dioxide, so with before be about to using, mixing fluorinated ketone and the liquid that is provided by different system The situation of attitude carbon dioxide is compared, and the mixing ratio of fluorinated ketone and liquid carbon dioxide is protected Hold constant.
Therefore, can determine accurately the fluorinated ketone concentration of molten metal treating agent. Therefore, can Prevent reliably oxidation or the evaporation of motlten metal, and suppress harmful substance (COF2Deng) generation. In addition, can realize cost degradation.
(3) in molten metal treating agent of the present invention, be mixed with a small amount of fluorinated ketone and a large amount of Liquid carbon dioxide is so even in the situation of its leakage, also can make fluoridizing in the gas leakage Ketone concentration is below the permissible concentration, and is favourable aspect security. Process easily in addition.
(4) blanketing gas feedway of the present invention is according to the detection of the fluorinated ketone concentration of blanketing gas Value is controlled the flow of gasifying gas, thereby can suppress the variation of the fluorinated ketone concentration of blanketing gas.
Therefore, can solve so-called that provide at blanketing gas that fluorinated ketone concentration rises gradually in the process, Use as the problem points in the liquid inorganic agent situation of solvent, can obtain steady with liquid carbon dioxide Fixed motlten metal protection effect.
(5) in blanketing gas feedway of the present invention, because can suppress the fluorine of blanketing gas Change the change of ketone concentration, thus the fluorinated ketone use amount can be controlled, favourable aspect cost.
(6) in blanketing gas feedway of the present invention, because control object is gasifying gas Flow, so do not need the flow-control of bulk gas. For this reason, device is consisted of simplify, The suppression equipment cost.
(7) in the present invention, be that 0.1～10 quality % is (excellent by the concentration that makes the inorganic agent fluorinated ketone Elect 0.4～8 quality % as), can fully improve the fluorinated ketone concentration in the gas phase section in the filling containers.
For this reason, fully the fluorinated ketone concentration of the gasifying gas behind the whole liquid of raising taking-up can prevent The motlten metal protection effect deficiency of blanketing gas.
In addition, after taking out whole liquid, also can utilize the fluorinated ketone of the gas phase section in the filling containers And not waste, so favourable aspect cost.
(8) the fluorinated ketone concentration of blanketing gas is not based on the flow of blanketing gas and is based on gasification The value of the flow of gas.
The structure of blanketing gas feedway of the present invention is to possess gasifying gas pressure regulator, master Body gas pressure adjuster and blanketing gas flow rate regulating valve are if set the blanketing gas supply flow rate Become the value of regulation, though increase and decrease gasifying gas flow, also can make the bulk gas flow increase and decrease occur and Eliminate its flow change.
Therefore, no matter how many blanketing gas supply flow rates is, can make the fluorinated ketone concentration of blanketing gas Constant.
(9) in the blanketing gas feedway of the present invention, make melting in the filling containers by use The carbon dioxide of metal conditioner is in the supercritical gasification mechanism of supercriticality, can make to fill to hold The fluorinated ketone concentration of the inorganic agent in the device becomes even.
For this reason, the fluorinated ketone concentration of gasifying gas can not rise gradually in the supply process, can prevent The fluorinated ketone concentration of blanketing gas changes.
In addition, because the fluorinated ketone concentration of the inorganic agent in the filling containers is homogenized, so do not cause Fluorinated ketone concentration when taking out whole liquid reduces. For this reason, can prevent that the fluorinated ketone of blanketing gas is dense Degree changes.
And then, because there is no need to use controlling organization, can the needed cost of restraining device.
Claims (23)
1. molten metal treating agent is the molten metal treating agent that is used for the blanketing gas that contacts with the surface of motlten metal, it is characterized in that,
Be that liquefied mixture by the fluorinated ketone that has dissolved 0.2～7 quality % in liquid carbon dioxide constitutes.
2. molten metal treating agent as claimed in claim 1 is characterized in that,
Fluorinated ketone be from perfluorinated ketone, hydrofluorination ketone, and composition thereof select more than a kind.
3. molten metal treating agent as claimed in claim 2 is characterized in that,
Fluorinated ketone is a perfluorinated ketone, and described perfluorinated ketone is from CF
3CF
2C (O) CF (CF
3)
2, (CF
3)
2CFC (O) CF (CF
3)
2, CF
3(CF
2)
2C (O) CF (CF
3)
2, CF
3(CF
2)
3C (O) CF (CF
3)
2, CF
3(CF
2)
5C (O) CF
3, CF
3CF
2C (O) CF
2CF
2CF
3, CF
3C (O) CF (CF
3)
2, and the perfluor cyclohexanone in select more than a kind.
4. molten metal treating agent as claimed in claim 2 is characterized in that,
Fluorinated ketone is a hydrofluorination ketone, and described hydrofluorination ketone is from HCF
2CF
2C (O) CF (CF
3)
2, CF
3C (O) CH
2C (O) CF
3, C
2H
5C (O) CF (CF
3)
2, CF
2CF
2C (O) CH
3, (CF
3)
2CFC (O) CH
3, CF
3CF
2C (O) CHF
2, CF
3CF
2C (O) CH
2F, CF
3CF
2C (O) CH
2CF
3, CF
3CF
2C (O) CH
2CH
3, CF
3CF
2C (O) CH
2CHF
2, CF
3CF
2C (O) CH
2CHF
2, CF
3CF
2C (O) CH
2CH
2F, CF
3CF
2C (O) CHFCH
3, CF
3CF
2C (O) CHFCHF
2, CF
3CF
2C (O) CHFCH
2F, CF
3CF
2C (O) CF
2CH
3, CF
3CF
2C (O) CF
2CHF
2, CF
3CF
2C (O) CF
2CH
2F, (CF
3)
2CFC (O) CHF
2, (CF
3)
2CFC (O) CH
2F, CF
3CF (CH
2F) C (O) CHF
2, CF
3CF (CH
2F) C (O) CH
2F and CF
3CF (CH
2F) C (O) CF
3More than a kind of middle selection.
5. molten metal treating agent as claimed in claim 1 is characterized in that,
Fluorinated ketone is C
3F
7(CO) C
2F
5
6. according to any described molten metal treating agent in the claim 1～5, it is characterized in that, be filled in the container with liquid condition.
7. molten metal treating agent as claimed in claim 6 is characterized in that,
In the described container, the surface at least of the parts that constitute in the middle of the parts that molten metal treating agent contacted, by synthetic resin is by forming more than a kind of selecting from neoprene, butyl rubber, fluorubber, ethylene propylene rubber, silicone rubber, acrylonitrile-butadiene rubber, polyflon, nylon, acetal resin, daiflon.
8. the molten metal treating agent that is used for blanketing gas as claimed in claim 1 wherein makes described liquid carbon dioxide become supercriticality.
9. a motlten metal processing method is characterized in that,
The molten metal treating agent gasification that liquefied mixture by the fluorinated ketone that has dissolved 0.2～7 quality % in liquid carbon dioxide is formed provides as the blanketing gas that contacts with the surface of motlten metal.
10. motlten metal processing method as claimed in claim 9, it may further comprise the steps:
Make described liquid carbon dioxide become supercriticality;
Described molten metal treating agent gasifies; With
It is provided as the blanketing gas that contacts with the surface of described motlten metal.
11. a motlten metal processing method is characterized in that,
The molten metal treating agent that uses humidifier that the liquefied mixture by the fluorinated ketone that has dissolved 0.2～7 quality % in liquid carbon dioxide is formed atomizes, make the liquid carbon dioxide gasification simultaneously, use propellant with this carbon dioxide as spraying, vaporific fluorinated ketone is provided as the blanketing gas that contacts with the surface of motlten metal.
12. motlten metal processing method as claimed in claim 11, it may further comprise the steps:
Make described liquid carbon dioxide become supercriticality;
By using humidifier to make described molten metal treating agent atomizing;
Make the liquid carbon dioxide gasification simultaneously; With
Use described carbon dioxide to use propellant, vaporific fluorinated ketone is provided as the blanketing gas that contacts with the surface of motlten metal as spraying.
13. a motlten metal with the feedway of blanketing gas, is that motlten metal is offered the device of motlten metal with blanketing gas, it is characterized in that possessing:
The filling containers that the molten metal treating agent that is made of the liquefied mixture that contains liquid carbon dioxide and fluorinated ketone is filled,
Make the gasification of described molten metal treating agent and obtain gasifying gas gasifier,
The gasifying gas flow rate regulating valve of the flow of adjustment gasifying gas,
As the bulk gas supply unit of the supply source of bulk gas,
Detect fluorinated ketone concentration in the blanketing gas that described gasifying gas and bulk gas is mixed and obtain concentration testing agency and
Adjust the aperture of described gasifying gas flow rate regulating valve according to the detected value of concentration testing agency and control the control part of the flow of gasifying gas thus.
14. the motlten metal as claimed in claim 13 feedway of blanketing gas is characterized in that possessing:
Make the pressure constant of gasifying gas the gasifying gas pressure regulator,
Make bulk gas the pressure constant the bulk gas pressure regulator and
Adjust the blanketing gas flow rate regulating valve of the flow of blanketing gas.
15. the motlten metal as claimed in claim 13 feedway of blanketing gas is characterized in that possessing:
Make the pressure constant of gasifying gas the gasifying gas pressure regulator,
Make the pressure constant of bulk gas the bulk gas pressure regulator,
Adjust the bulk gas flow rate regulating valve of the flow of bulk gas.
16. a motlten metal with the feedway of blanketing gas, is that motlten metal is offered the device of motlten metal with blanketing gas, it is characterized in that possessing:
The filling containers that the molten metal treating agent that is made of the liquefied mixture that contains liquid carbon dioxide and fluorinated ketone is filled,
Adjust the flow of described molten metal treating agent the inorganic agent flow rate regulating valve,
Make the gasification of described molten metal treating agent and obtain gasifying gas gasifier,
As the bulk gas supply unit of the supply source of bulk gas,
Detect fluorinated ketone concentration in the blanketing gas that described gasifying gas and bulk gas is mixed and obtain concentration testing agency and
Adjust the aperture of described inorganic agent flow rate regulating valve according to the detected value of concentration testing agency and control the control part of the flow of described molten metal treating agent thus.
17. a motlten metal with the feedway of blanketing gas, is that motlten metal is offered the device of motlten metal with blanketing gas, it is characterized in that possessing:
The filling containers that the molten metal treating agent that is made of the liquefied mixture that contains liquid carbon dioxide and fluorinated ketone is filled,
Make the carbon dioxide of the molten metal treating agent in this filling containers become supercriticality supercritical gasification mechanism,
As the bulk gas supply unit of the supply source of bulk gas and
Described molten metal treating agent and bulk gas mixed and obtain the blender of blanketing gas.
18. the motlten metal as claimed in claim 17 feedway of blanketing gas is characterized in that,
Described supercritical gasification mechanism is the heating arrangements of the molten metal treating agent in the described filling containers of heating.
19. the feedway as claim 17 or 18 described motlten metals usefulness blanketing gas is characterized in that,
Possess the pressure regulator that the pressure of the molten metal treating agent that takes out from described filling containers is adjusted,
Described supercritical gasification mechanism can keep the supercriticality of carbon dioxide till molten metal treating agent arrives described pressure regulator at least.
20. a motlten metal with the supply method of blanketing gas, is that motlten metal is offered the method for motlten metal with blanketing gas, it is characterized in that,
The gasifying gas and the bulk gas that the molten metal treating agent that is made of the liquefied mixture that contains liquid carbon dioxide and fluorinated ketone will be gasified and obtain are mixed, detect fluorinated ketone concentration in the blanketing gas that obtains, control the flow of described gasifying gas or molten metal treating agent according to its detected value.
21. a motlten metal with the supply method of blanketing gas, is that motlten metal is offered the method for motlten metal with blanketing gas, it is characterized in that,
In filling containers, make the carbon dioxide of the molten metal treating agent that constitutes by the liquefied mixture that contains liquid carbon dioxide and fluorinated ketone be in supercriticality, from described filling containers, take out this molten metal treating agent then and mix, the blanketing gas that obtains is offered motlten metal with bulk gas.
22. the motlten metal as claimed in claim 21 supply method of blanketing gas is characterized in that,
The fluorinated ketone concentration that contains in described molten metal treating agent is 0.2～7 quality %, and when liquid carbon dioxide was in supercriticality in making filling containers, making temperature was more than 31 ℃ and pressure is more than the 7.38MPa.
23. it is characterized in that with the supply method of blanketing gas as any described motlten metal in the claim 20～22,
Described fluorinated ketone is pentafluoroethyl group-seven a fluoropropyl ketone.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003053306 | 2003-02-28 | ||
| JP53306/2003 | 2003-02-28 | ||
| JP324816/2003 | 2003-09-17 | ||
| JP390966/2003 | 2003-11-20 | ||
| JP13573/2004 | 2004-01-21 | ||
| JP13572/2004 | 2004-01-21 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100098517A Division CN101275188B (en) | 2003-02-28 | 2004-02-26 | Molten metal treating agent, method for treating molten metal, and apparatus and method for feeding cover gas to molten metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1753745A CN1753745A (en) | 2006-03-29 |
| CN100411775C true CN100411775C (en) | 2008-08-20 |
Family
ID=36680242
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100098517A Expired - Fee Related CN101275188B (en) | 2003-02-28 | 2004-02-26 | Molten metal treating agent, method for treating molten metal, and apparatus and method for feeding cover gas to molten metal |
| CNB2004800050895A Expired - Fee Related CN100411775C (en) | 2003-02-28 | 2004-02-26 | Molten metal treating agent, method of treating molten metal, apparatus and method for supplying covering gas for molten metal |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100098517A Expired - Fee Related CN101275188B (en) | 2003-02-28 | 2004-02-26 | Molten metal treating agent, method for treating molten metal, and apparatus and method for feeding cover gas to molten metal |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN101275188B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115074562A (en) * | 2022-08-03 | 2022-09-20 | 万丰镁瑞丁新材料科技有限公司 | Protection method and device in magnesium and magnesium alloy smelting process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05214384A (en) * | 1992-02-06 | 1993-08-24 | Asahi Chem Ind Co Ltd | Cleaning solvent containing 2h,5h-perflourohexane |
| JPH10231499A (en) * | 1997-02-20 | 1998-09-02 | Toshiba Corp | Nonflammable or flame-retardant vapor cleaning composition |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1185248B1 (en) * | 1999-06-09 | 2012-05-02 | Robert E. Sievers | Supercritical fluid-assisted nebulization and bubble drying |
| WO2001005468A2 (en) * | 1999-07-20 | 2001-01-25 | 3M Innovative Properties Company | Use of fluorinated ketones in fire extinguishing compositions |
| CN1228587C (en) * | 2001-12-19 | 2005-11-23 | 重庆大学 | Mixed liquid CO2 cold wind generator |
-
2004
- 2004-02-26 CN CN2008100098517A patent/CN101275188B/en not_active Expired - Fee Related
- 2004-02-26 CN CNB2004800050895A patent/CN100411775C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05214384A (en) * | 1992-02-06 | 1993-08-24 | Asahi Chem Ind Co Ltd | Cleaning solvent containing 2h,5h-perflourohexane |
| JPH10231499A (en) * | 1997-02-20 | 1998-09-02 | Toshiba Corp | Nonflammable or flame-retardant vapor cleaning composition |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101275188B (en) | 2010-12-01 |
| CN1753745A (en) | 2006-03-29 |
| CN101275188A (en) | 2008-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7776134B2 (en) | Molten metal treatment, method for treating molten metal, and apparatus and method for feeding cover gas to molten metal | |
| US20060121192A1 (en) | Liquid precursor refill system | |
| TWI557264B (en) | Raw material gas supply device, film forming apparatus, raw material gas supply method, and non-transitory storage medium | |
| CA2106734C (en) | Apparatus for supplying cvd coating devices | |
| JPH06291040A (en) | Method and apparatus for vaporizing and supplying liquid | |
| US20140261733A1 (en) | Processing Chamber Gas Delivery System with Hot-Swappable Ampoule | |
| TW201040306A (en) | Bubbling supply system for stable precursor supply | |
| JP2008157457A (en) | Gas supply device for driving machine | |
| TW201641740A (en) | Container for chemical precursors in a deposition process | |
| CN100411775C (en) | Molten metal treating agent, method of treating molten metal, apparatus and method for supplying covering gas for molten metal | |
| JP4574801B2 (en) | Liquefied gas mixing equipment | |
| US6832699B2 (en) | Direct pressure apparatus and method for dispensing coatings | |
| JP3866717B2 (en) | Molten metal treatment agent and molten metal treatment method | |
| EP1838894A2 (en) | Pentaborane(9) storage and delivery | |
| JP2005171374A (en) | Apparatus and method for supplying covering gas for molten metal | |
| US20090032982A1 (en) | System and method for providing a gas mixture | |
| JPH1192823A (en) | Atmosphere generator for heat treatment | |
| JP4904433B1 (en) | Surface modification processing equipment | |
| US11458412B2 (en) | Controlled vapor delivery into low pressure processes | |
| KR102219044B1 (en) | Compressed gas conditioning assembly or related improvements | |
| JPH06316765A (en) | Vaporizer for liquid material | |
| TW201704522A (en) | Film forming method and film forming apparatus for forming nitride film using mocvd apparatus, and shower head | |
| JPH0227212B2 (en) | ||
| KR101284585B1 (en) | Semiconductor device manufacturing equipment and controlling method thereof | |
| KR20210079644A (en) | Apparatus for supplying protective gas to molten magnesium alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080820 Termination date: 20150226 |
|
| EXPY | Termination of patent right or utility model |