CN1225333C - Mixture utilized to generate gas for protecting magnesium alloy in reaction - Google Patents
Mixture utilized to generate gas for protecting magnesium alloy in reaction Download PDFInfo
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- CN1225333C CN1225333C CNB031240704A CN03124070A CN1225333C CN 1225333 C CN1225333 C CN 1225333C CN B031240704 A CNB031240704 A CN B031240704A CN 03124070 A CN03124070 A CN 03124070A CN 1225333 C CN1225333 C CN 1225333C
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- mixture
- carbon
- magnesium alloy
- mass ratio
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- Powder Metallurgy (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
The present invention relates to a mixture for generating a protective gas of magnesium alloys in reaction, which is composed of sulfur and carbon with a mass ratio of 1:1 to 1:7. The sulfur is powdery or granular elemental sulfur; the carbon is powdery or granular elemental carbon; the sulfur and the carbon are dried and are uniformly mixed according to the mass ratio. The present invention can be used for providing a mixed protective gas containing SO2 and CO2 on line for the fire retardant protection of magnesium alloy melt.
Description
Technical field
What the present invention relates to is a kind of mixture that generates the magnesium alloy shielding gas that is used to react.
Background technology
SO
2Gas protection method is a kind of in the magnesium alloy fused mass resist technology.Existing SO
2In the resist technology, SO
2And assist gas (CO
2, N
2Deng) how employing is bottled or canned, has following problem: (1) gas cylinder or gas tank outsourcing and transportation are inconvenient; (2) need special gas mixer and control corresponding device thereof, equipment is complicated; (3) cost is higher.
Summary of the invention
In order to overcome above problem, the invention provides and a kind ofly can be used for online (promptly in magnesium alloy smelting or production plant) reaction and generate and to contain SO
2The mixture of mixed gas.
The technical solution adopted for the present invention to solve the technical problems is: this mixture is made up of sulphur and carbon, and the mass ratio of sulphur and carbon is 1: 1～1: 7, and sulphur is elemental sulfur, be powder or particulate state, carbon is simple substance carbon, is powder or particulate state, the two all is exsiccant, and compares uniform mixing by quality.Can be used for reacting generating onlinely and contain SO
2And CO
2Hybrid protection gas, carry out the fire-resisting protection of magnesium alloy fused mass.
The invention has the beneficial effects as follows, can be used for providing containing SO onlinely
2Hybrid protection gas, easy to use, with low cost.
Embodiment
The present invention is further described below in conjunction with embodiment.
Mixture among the embodiment 1 is made up of exsiccant sulphur powder and carbon dust, and the former and the latter's mass ratio is 1: 1, and granularity is 100 orders～200 orders, and the two thorough mixing in agitator is even.Test shows, under 750 ± 15 ℃ condition, uses the mixture (with 1.25g/min speed even feeding) in the present embodiment to carry out chemical reaction with dried compressed air (with the speed air feed of 10L/min), generates mixed gas, wherein: SO
2Mass percent is 11.2%, CO
2Mass ratio is 20.6%, all the other are N
2Seldom measure O
2, this mixed gas can provide good fire-resisting protection for magnesium alloy fused mass when being lower than 750 ℃.
Mixture among the embodiment 2 is made up of exsiccant sulphur powder and carbon dust, and the former and the latter's mass ratio is 1: 2, and granularity is 100 orders～200 orders, and the two thorough mixing in agitator is even.Test shows, under 750 ± 15 ℃ condition, uses the mixture (with 1.10g/min speed even feeding) in the present embodiment to carry out chemical reaction with dried compressed air (with the speed air feed of 10L/min), generates mixed gas, wherein: SO
2Mass percent is 6.6%, CO
2Mass ratio is 24.2%, all the other are N
2Seldom measure O
2, this mixed gas can provide good fire-resisting protection for magnesium alloy fused mass when being lower than 750 ℃.
Mixture among the embodiment 3 is made up of exsiccant sulphur powder and carbon dust, and the former and the latter's mass ratio is 1: 3, and granularity is 100 orders～200 orders, and the two thorough mixing in agitator is even.Test shows, under 750 ± 15 ℃ condition, uses the mixture (with 1.05g/min speed even feeding) in the present embodiment to carry out chemical reaction with dried compressed air (with the speed air feed of 10L/min), generates mixed gas, wherein: SO
2Mass percent be 4.7%, CO
2Mass ratio is 25.7%, all the other are N
2Seldom measure O
2, this mixed gas can provide good fire-resisting protection for magnesium alloy fused mass when being lower than 750 ℃.
Mixture among the embodiment 4 is made up of exsiccant sulphur powder and carbon dust, and the former and the latter's mass ratio is 1: 4, and granularity is 100 orders～200 orders, and the two thorough mixing in agitator is even.Test shows, under 750 ± 15 ℃ condition, uses the mixture (with 1.00g/min speed even feeding) in the present embodiment to carry out chemical reaction with dried compressed air (with the speed air feed of 10L/min), generates mixed gas, wherein: SO
2Mass percent is 3.6%, CO
2Mass ratio is 26.5%, all the other are N
2Seldom measure O
2, this mixed gas can provide good fire-resisting protection for magnesium alloy fused mass when being lower than 750 ℃.
Mixture among the embodiment 5 is made up of exsiccant sulphur powder and carbon dust, and the former and the latter's mass ratio is 1: 5, and granularity is 100 orders～200 orders, and the two thorough mixing in agitator is even.Test shows, under 750 ± 15 ℃ condition, uses the mixture (with 0.97g/min speed even feeding) in the present embodiment to carry out chemical reaction with dried compressed air (with the speed air feed of 10L/min), generates mixed gas, wherein: SO
2Mass percent is 2.9%, CO
2Mass ratio is 27.1%, all the other are N
2Seldom measure O
2, this mixed gas can provide good fire-resisting protection for magnesium alloy fused mass when being lower than 750 ℃.
Mixture among the embodiment 6 is made up of exsiccant sulphur powder and carbon dust, and the former and the latter's mass ratio is 1: 6, and granularity is 100 orders～200 orders, and the two thorough mixing in agitator is even.Test shows, under 750 ± 15 ℃ condition, uses the mixture (with 0.96g/min speed even feeding) in the present embodiment to carry out chemical reaction with dried compressed air (with the speed air feed of 10L/min), generates mixed gas, wherein: SO
2Mass percent is 2.5%, CO
2Mass ratio is 27.4%, all the other are N
2Seldom measure O
2, this mixed gas can provide good fire-resisting protection for magnesium alloy fused mass when being lower than 740 ℃.
Mixture among the embodiment 7 is made up of exsiccant sulphur powder and carbon dust, and the former and the latter's mass ratio is 1: 7, and granularity is 100 orders～200 orders, and the two thorough mixing in agitator is even.Test shows, under 750 ± 15 ℃ condition, uses the mixture (with 0.95g/min speed even feeding) in the present embodiment to carry out chemical reaction with dried compressed air (with the speed air feed of 10L/min), generates mixed gas, wherein: SO
2Mass percent is 2.2%, CO
2Mass ratio is 27.7%, all the other are N
2Seldom measure O
2, this mixed gas can provide good fire-resisting protection for magnesium alloy fused mass when being lower than 730 ℃.
Claims (1)
1. one kind is used to react the mixture that generates the magnesium alloy shielding gas; it is characterized in that: this mixture is made up of sulphur and carbon two portions; granularity is 100 orders～200 orders; the mass ratio of sulphur and carbon is 1: 1～1: 7, and sulphur is elemental sulfur, is powder or particulate state; carbon is simple substance carbon; be powder or particulate state, the two all is exsiccant, and compares uniform mixing by quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031240704A CN1225333C (en) | 2002-12-16 | 2003-04-24 | Mixture utilized to generate gas for protecting magnesium alloy in reaction |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02128049 | 2002-12-16 | ||
| CN02128049.5 | 2002-12-16 | ||
| CNB031240704A CN1225333C (en) | 2002-12-16 | 2003-04-24 | Mixture utilized to generate gas for protecting magnesium alloy in reaction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1446649A CN1446649A (en) | 2003-10-08 |
| CN1225333C true CN1225333C (en) | 2005-11-02 |
Family
ID=28455408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031240704A Expired - Fee Related CN1225333C (en) | 2002-12-16 | 2003-04-24 | Mixture utilized to generate gas for protecting magnesium alloy in reaction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1225333C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135005B (en) * | 2006-08-28 | 2011-03-23 | 贵州世纪天元矿业有限公司 | Method for generating metal vacuum smelting protective gas |
| CA2691070A1 (en) * | 2007-06-25 | 2008-12-31 | L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procede S Georges Claude | Gas mixture for dosing liquids with sulphur dioxide and method for using the same |
-
2003
- 2003-04-24 CN CNB031240704A patent/CN1225333C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1446649A (en) | 2003-10-08 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051102 Termination date: 20130424 |