CN101135006B - Method for generating metal vacuum smelting protective gas - Google Patents
Method for generating metal vacuum smelting protective gas Download PDFInfo
- Publication number
- CN101135006B CN101135006B CN2006102008291A CN200610200829A CN101135006B CN 101135006 B CN101135006 B CN 101135006B CN 2006102008291 A CN2006102008291 A CN 2006102008291A CN 200610200829 A CN200610200829 A CN 200610200829A CN 101135006 B CN101135006 B CN 101135006B
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- gas
- attitude
- earth metal
- high temperature
- argon
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- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The present invention discloses method of creating protecting gas for vacuum metal smelting. The mixture of argon of 98 % over purity in 90-99.5 wt% and sulfur powder in 0.5-10 wt% is sprayed to alkali earth metal at high temperature or in melt state to form protecting gas layer in the surface of alkali earth metal. Argon excludes oxygen in the air and sulfur powder mixed inside argon reacts with oxygen inside the argon mixture to produce SO2. The present invention replaces sulfur with the mixture of argon and sulfur powder to form protecting gas, and can avoid the oxygen of alkali earth metal, reduce the impurity content in metal melt and reduce environmental pollution caused by SO2. The present invention is suitable for smelting of alkali earth metal and its alloy, casting, etc.
Description
Technical field
The present invention relates to a kind of generation method of shielding gas, particularly relate to a kind of generation method of metal vacuum smelting protective gas.
Background technology
In production processes such as the smelting of alkaline-earth metal and alloy smelting thereof, casting, die casting, extruding, for avoid alkaline-earth metal at high temperature with oxygen (O
2) oxidation even burning take place, must make alkaline-earth metal and air isolated, in alkaline-earth metal smelting at present or the castingprocesses, use sulfurous gas (SO widely
2) gas or sulfur hexafluoride (SF
6) gas is as the shielding gas of alkaline-earth metal high temperature attitude or melt.At existing sulfurous gas (SO
2) in the gas shield technology, generally adopt to the metallic high temperature attitude or bath surface is manually shed or machinery sprays simple substance powder sulphur (S) and obtains sulfurous gas (SO
2), sulfurous gas (SO
2) can cause severe contamination to environment, also unfavorable to workers'health; At existing sulfur hexafluoride (SF
6) in the resist technology, sulfur hexafluoride (SF
6) cost an arm and a leg, cause product cost high, simultaneously sulfur hexafluoride (SF
6) also be to belong to greenhouse gases, also can have a negative impact to environment.
Summary of the invention
The objective of the invention is to, a kind of method of new generation metal vacuum smelting protective gas is provided.This method both can effectively prevent the oxidation of alkaline-earth metal and stop burning, reduce the foreign matter content of metal melt; Can reduce the sulfur dioxide gas scale of construction of generation again, reduce pollution environment.
Technical scheme of the present invention: a kind of method metal that generates metal vacuum smelting protective gas, be characterized in: with the purity of mass ratio 90～99.5% argon gas 98% or more and the mixture of the simple substance powder sulphur formation of mass ratio 0.5～10%, to the alkaline-earth metal jet surface of high temperature attitude or melt attitude, form the gas shield layer on the alkaline-earth metal surface of high temperature attitude or solution attitude; With the oxygen in the argon gas secluding air, the simple substance powder sulphur that is blended in the argon gas at high temperature reacts with the oxygen that is blended in the argon gas, generates sulfur dioxide gas, has avoided the oxidation on high temperature attitude or melt attitude alkaline-earth metal surface effectively.
In the method for above-mentioned generation metal vacuum smelting protective gas, described mixture is the argon gas of purity more than 99% and the simple substance powder sulphur formation of mass ratio 2～5% with mass ratio 95～98%.
In the method for aforesaid generation metal vacuum smelting protective gas, described simple substance powder sulphur is granularity 100～200 purpose simple substance powder sulphur.
In the method for aforesaid generation metal vacuum smelting protective gas, along with the reduction of the alkaline-earth metal surface oxygen content of high temperature attitude or solution attitude, the add-on of simple substance powder sulphur can reduce or cancel.
Compared with prior art, the present invention replaces with serious pollution manually shedding or machinery sprinkling simple substance powder sulphur (S) resist technology and the high sulfur hexafluoride (SF of price with the mixture of argon gas and simple substance powder sulphur (S) formation
6) resist technology, the hybrid protection gas of formation is argon gas (Ar
2) and micro-sulfurous gas (SO
2).Both can effectively prevent or stop the oxidation and the burning of alkaline-earth metal, help reducing the foreign matter content of metal melt; Can reduce pollution again to environment.The shielding gas that adopts the present invention to generate has characteristics easy to use, with low cost, that environmental pollution is little, and its application conditions is same as the prior art.The present invention is applicable to productions such as the smelting of alkaline-earth metal and alloy smelting thereof, casting, die casting, extruding.
Embodiment
Embodiment.Generating the method for metal vacuum smelting protective gas, is 99% argon gas (Ar with 96% purity
2) and 4% granularity be the mixture that 200 purpose simple substance powder sulphur (S) constitute, spray or spray to the alkaline-earth metal surface of high temperature attitude or melt attitude, form the gas shield layer on the alkaline-earth metal surface of high temperature attitude or solution attitude; Oxygen in the argon gas secluding air is blended in simple substance powder sulphur and the metallic surface that is distributed in high temperature attitude or melt attitude oxygen generation chemical reaction on every side in the argon gas, generates sulfurous gas (SO
2) gas, consume high temperature attitude or melt attitude metallic surface oxygen (O on every side
2), reach the purpose that fire-resisting protection reaches anti-oxidation.Because argon gas (Ar
2) molecular weight greater than the molecular-weight average of air, argon gas (Ar
2) distributing is positioned at the high temperature attitude or the melt attitude metallic surface of gas bottom, has completely cut off oxygen (O
2), played fire-resisting protection and anti-oxidation to high temperature attitude or melt attitude metallic surface, also reduced the amount of powder sulphur (S) participation reaction simultaneously, reduced sulfurous gas (SO
2) the generation total amount of gas.When the oxygen level of high temperature attitude or melt attitude metallic surface reduces (by the oxygen measuring apparatus test), can according to circumstances reduce or cancel the add-on of powder sulphur (S).Alkaline earth melt melting and casting under present method protection helps reducing the foreign matter content of metal melt.
The mixture that the present invention constitutes with argon gas and simple substance powder sulphur (S) replaces with serious pollution manually shedding or machinery sprinkling simple substance powder sulphur (S) resist technology and the high sulfur hexafluoride (SF of price
6) resist technology, the hybrid protection gas of formation is argon gas and micro-sulfurous gas (SO
2), its application conditions is same as the prior art.
Claims (3)
1. method that generates metal vacuum smelting protective gas, it is characterized in that: with the purity of mass ratio 95～98% argon gas 99% or more and the mixture of the simple substance powder sulphur formation of mass ratio 2～5%, to the alkaline-earth metal jet surface of high temperature attitude or melt attitude, form the gas shield layer on the alkaline-earth metal surface of high temperature attitude or melt attitude; With the oxygen in the argon gas secluding air, the simple substance powder sulphur that is blended in the argon gas at high temperature reacts with the oxygen that is blended in the argon gas, generates sulfurous gas, has avoided the oxidation on high temperature attitude or melt attitude alkaline-earth metal surface effectively.
2. the method for generation metal vacuum smelting protective gas according to claim 1 is characterized in that: described simple substance powder sulphur is granularity 100～200 purpose simple substance powder sulphur.
3. the method for generation metal vacuum smelting protective gas according to claim 2 is characterized in that: along with the reduction of oxygen level in the alkaline-earth metal surface protection gas of high temperature attitude or melt attitude, the add-on of simple substance powder sulphur reduces or cancellation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006102008291A CN101135006B (en) | 2006-08-28 | 2006-08-28 | Method for generating metal vacuum smelting protective gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006102008291A CN101135006B (en) | 2006-08-28 | 2006-08-28 | Method for generating metal vacuum smelting protective gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101135006A CN101135006A (en) | 2008-03-05 |
| CN101135006B true CN101135006B (en) | 2011-10-05 |
Family
ID=39159330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006102008291A Expired - Fee Related CN101135006B (en) | 2006-08-28 | 2006-08-28 | Method for generating metal vacuum smelting protective gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101135006B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1584074A (en) * | 2004-05-24 | 2005-02-23 | 重庆镁业科技股份有限公司 | Magnesium or magnesium alloy smelting protective method and apparatus thereof |
-
2006
- 2006-08-28 CN CN2006102008291A patent/CN101135006B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1584074A (en) * | 2004-05-24 | 2005-02-23 | 重庆镁业科技股份有限公司 | Magnesium or magnesium alloy smelting protective method and apparatus thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101135006A (en) | 2008-03-05 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20140828 |
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| EXPY | Termination of patent right or utility model |