CN1584074A - Magnesium or magnesium alloy smelting protective method and apparatus thereof - Google Patents
Magnesium or magnesium alloy smelting protective method and apparatus thereof Download PDFInfo
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- CN1584074A CN1584074A CN 200410022620 CN200410022620A CN1584074A CN 1584074 A CN1584074 A CN 1584074A CN 200410022620 CN200410022620 CN 200410022620 CN 200410022620 A CN200410022620 A CN 200410022620A CN 1584074 A CN1584074 A CN 1584074A
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- magnesium
- magnesium alloy
- powder
- sulphur
- air
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Abstract
A protective method and apparatus for preventing magnesium or magnesium alloy oxidation when smelting are disclosed. It is prepared by spaying sulfur dioxide air into surface of magnesium or magnesium alloy solution and forming MgO and MgS protective layer for preventing magnesium or magnesium alloy from contacting with air. It is characterized by heating by sulfur powder or sour powder, air, sulfur powder and sour powder reacting by dried compressed air, producing sulfur dioxide air and directly spraying magnesium or magnesium alloy solution surface. Its advantages include simple structure and operation, low cost and good safety.
Description
One, technical field
When the present invention relates to magnesium or magnesium alloy smelting guard method and the device that prevents that magnesium or magnesium alloy oxidation from being taked.
Two, technical background
Magnesium is a kind of very active metal, and very easily oxidation after the high temperature melting causes the wasting of resources and quality to reduce, and is used for casting or die casting then may cause scrap rate to increase as it.And for example its sfgd. is ineffective, also may cause the fierce oxidation of magnesium or magnesium alloy, burning, very causes accident from producing serious blast.Therefore, when magnesium or magnesium alloy smelting, all need adopt sfgd. to prevent the oxidation of magnesium or magnesium alloy.
At present, adopt usually on magnesium or magnesium alloy fused mass surface when melting magnesium or magnesium alloy, cover one deck sulfur dioxide gas, prevention magnesium or magnesium alloy contact with air, prevent the oxidation of magnesium or magnesium alloy.And in order to guarantee that the sulfur dioxide gas physical efficiency all can cover magnesium or Mg alloy surface in whole fusion process, be constantly to magnesium or magnesium alloy fused mass jet surface sulfur dioxide gas when melting.And can constantly provide the sulfur dioxide gas mode to be comparatively easily at present: the accumulating bottle of in special factory, sulfurous gas being made liquid and being packed into special; after being transported to the use place; in smelting pot, reach protection through special gas distribution station pipe-line transportation to magnesium alloy fused mass.Because the severe corrosive of sulfurous gas is all wanted control very strictly and higher to the equipment and the requirements for pipes that store, carry in storage, transportation and use.However, the equipment and the pipeline that store, carry also often damage, and cause the equipment cisco unity malfunction.Can cause also that if any leaking operator come to harm.
Three, summary of the invention
The invention provides a kind of new magnesium or the guard method and the device of magnesium alloy smelting, the same with prior art also is to adopt sulfur dioxide gas to cover magnesium or magnesium alloy fused mass surface, prevents the oxidation of magnesium or magnesium alloy.The present invention makes raw material with SULPHUR POWDER or the higher powder of sulphur content, adopt special sulfur dioxide gas generating unit to make SULPHUR POWDER or the higher powder of sulphur content be heated to certain temperature, feed the dried compressed air of certain flow again, the higher powder of airborne oxygen and SULPHUR POWDER or sulphur content reacted at a certain temperature:
The sulfur dioxide gas that generates directly sprays to magnesium or magnesium alloy solution surface in the melting crucible, reaches the protection to magnesium in the crucible or magnesium alloy fused mass.In fact the sulfur dioxide gas generating unit is exactly an airtight shell of tank, and it is provided with inlet mouth, air outlet and charging bole, and the outlet of air outlet is in crucible.During use, this device is placed on the crucible edge, the heat that utilizes the crucible edge is to SULPHUR POWDER in this device or the higher powder heating of sulphur content, and by the dried compressed air of air inlet port to feeding certain flow in this device, make oxygen and sulphur reaction under heating in the pressurized air produce sulfur dioxide gas, directly magnesium or the magnesium alloy fused mass surface ejection in crucible of this sulfur dioxide gas from the air outlet.Because producer gas generator is simple in structure, can make smaller volume, directly be placed on the smelting pot edge and crucible pour spout place, do not need other more connecting tube, reduced the possibility of sulfurous gas to corrosive pipeline and gas leakage.
The present invention will be further described below in conjunction with embodiment of the invention synoptic diagram.
Four, description of drawings
Fig. 1 smelting pot side cutaway view, vertical view;
Fig. 2 is SO
2The instance graph of producer;
Fig. 3 is that the A-A of Fig. 2 is to sectional view;
Fig. 4 is at the crucible pour spout SO of place
2The instance graph of producer;
Fig. 5 is that the A-A of Fig. 4 is to sectional view.
Five, embodiment
Guard method of the present invention; be to adopt in the airtight housing 3 that is provided with air inlet port 1, production well 5 and charging bole 2 (claiming producer gas generator again), to place SULPHUR POWDER or the higher powder of sulphur content; adopt mode outside or inner heating; make the higher powder of SULPHUR POWDER or sulphur content be heated to certain temperature; feed the dried compressed air of certain flow again from air inlet port; the higher powder of air and SULPHUR POWDER or sulphur content is reacted at a certain temperature; generate sulfur dioxide gas and, directly spray to magnesium or magnesium alloy molten surface from the production well discharge.Protector of the present invention is the airtight housing system reform that is provided with air inlet port 1 and production well 5 that impels the higher powder of air and SULPHUR POWDER or sulphur content to react at a certain temperature; this housing can bear certain pressure; can heat by outside or inner mode, said apparatus is also referred to as SO
2Producer gas generator.
Fig. 1 is equipped with two producer gas generators in the present embodiment for the melting magnesium that adopted in the embodiment of the invention or the crucible vertical view of magnesium alloy.One is contained in crucible pour spout place, as Fig. 4, shown in Figure 5, on the edge that is contained in crucible, shown in Fig. 2,3.Selecting two producer gas generators and be placed in crucible respectively to fall on the edge of mouthful place and crucible, is in order to make magnesium or magnesium alloy all can be subjected to effective protection of sulfur dioxide gas in melting and toppling process.Obviously, according to the needs of the size and the melting technology of crucible bore, can also settle a plurality of producer gas generators.The producer gas generator volume of the embodiment of the invention is the 0.0065-0.0095 cubic meter, and each SULPHUR POWDER or the higher powder add-on of sulphur content are 0.3 to 0.5 kilogram, and the purity 99.8% of SULPHUR POWDER, granularity are at 250-350 between day.Producer gas generator is provided with air inlet port and production well, air inlet port links to each other with pressurized air, production well directly leads on the crucible interior magnesium or magnesium alloy fused mass surface, because compressed-air actuated minute-pressure power (0.01-0.02mpa) makes the sulfur dioxide gas of discharging from producer gas generator cover magnesium or magnesium alloy fused mass surface generation MgO and MgS; Stop magnesium or liquid magnesium alloy and air catalytic combustion.Producer gas generator in the embodiment of the invention can be established special heating unit, the heat that also can utilize smelting pot is by SULPHUR POWDER or the sulphur content higher powder heating of thermal conduction to producer gas generator and the inside, temperature requirement remains between 250 ℃ to 500 ℃, can adjust said temperature by the installation site and the mode of producer gas generator, make its Heating temperature remain on above-mentioned suitable temperature range.Pressurized air needs through super-dry before importing this device, and the sharp RDQ-2 type drying machine that reaches factory's manufacturing in available Chengdu carries out dry air, and its drying power is 2m
2/ min, dry precision is 0.003-0.03g/m
3, air flow quantity should be controlled at per hour 0.5m
3To 0.8m
3Between, flow can not be too big, and too conference causes in the sulfur dioxide gas oxygen content too high, causes the oxidation of magnesium or magnesium alloy equally.
Be not difficult to find out that by the foregoing description the method for the invention and device have simple in structure, easy and simple to handle, series of advantages such as cost is low and security is good.
Claims (8)
1, a kind of magnesium or magnesium alloy smelting guard method; employing is to magnesium or magnesium alloy fused mass surface spray sulfur dioxide gas; the MgO that contacts, the MgS protective layer that form to stop magnesium or magnesium alloy and air; it is characterized in that: adopt SULPHUR POWDER or the higher powder heating of sulphur content; make the higher powder of SULPHUR POWDER or sulphur content be heated to certain temperature; feed the dried compressed air of certain flow again; the higher powder of air and SULPHUR POWDER or sulphur content is reacted at a certain temperature, generate sulfur dioxide gas and directly spray to magnesium or magnesium alloy solution surface.
2, magnesium according to claim 1 or magnesium alloy smelting guard method and device thereof is characterized in that: this device includes housing (3), and inlet mouth (1) and air outlet (5) and charging bole (2) are arranged on housing, and the outlet of air outlet is in crucible (4).
3, magnesium according to claim 2 or magnesium alloy smelting guard method and device thereof is characterized in that: the nozzle of inlet mouth in housing to the correspondence position of charging bole.
4, according to claim 1,2,3 described magnesium or magnesium alloy smelting guard method and device thereof, it is characterized in that: the volume 0.0065-0.0095 cubic meter of housing, reinforced at every turn 0.3kg-0.5kg.
5, according to claim 1,2 described magnesium or magnesium alloy smelting guard method and device thereof, it is characterized in that: this device is settled at each position at crucible.
6, according to claim 1,2 described magnesium or magnesium alloy smelting guard method and device thereof; it is characterized in that: the thermal conduction of employing smelting pot is heated the SULPHUR POWDER or the higher powder of sulphur content of this device and the inside, and the higher powder temperature of the SULPHUR POWDER of housing and the inside or sulphur content remains between 250 ℃ to 500 ℃.
7, method and the device of protecting according to claim 1,2 described magnesium or magnesium alloy smelting thereof; it is characterized in that: adopt the outside or inner mode that heats that the SULPHUR POWDER or the higher powder of sulphur content of this device and the inside are heated, the SULPHUR POWDER or the higher powder temperature of sulphur content of housing the inside remain between 250 ℃ to 500 ℃.
8, according to the method and the device thereof of claim 1,2 described magnesium or magnesium alloy smelting protection, it is characterized in that: the pressurized air of importing this device needs through super-dry, and air flow quantity should be controlled at per hour 0.5m
2To 0.8m
2Between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410022620 CN1584074A (en) | 2004-05-24 | 2004-05-24 | Magnesium or magnesium alloy smelting protective method and apparatus thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410022620 CN1584074A (en) | 2004-05-24 | 2004-05-24 | Magnesium or magnesium alloy smelting protective method and apparatus thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1584074A true CN1584074A (en) | 2005-02-23 |
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ID=34600632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410022620 Pending CN1584074A (en) | 2004-05-24 | 2004-05-24 | Magnesium or magnesium alloy smelting protective method and apparatus thereof |
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| CN (1) | CN1584074A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100404711C (en) * | 2006-06-30 | 2008-07-23 | 清华大学 | Method for preventing liquid magnesium alloy from oxidation combustion and hermetic magnesium alloy smelting furnace |
| CN101135006B (en) * | 2006-08-28 | 2011-10-05 | 贵州世纪天元矿业有限公司 | Method for generating metal vacuum smelting protective gas |
| CN102389964A (en) * | 2011-11-11 | 2012-03-28 | 上海交通大学 | Magnesium alloy melt protector |
| CN103071780A (en) * | 2013-01-15 | 2013-05-01 | 西北工业大学 | Crucible for magnesium alloy directional solidification and preparation method of crucible |
-
2004
- 2004-05-24 CN CN 200410022620 patent/CN1584074A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100404711C (en) * | 2006-06-30 | 2008-07-23 | 清华大学 | Method for preventing liquid magnesium alloy from oxidation combustion and hermetic magnesium alloy smelting furnace |
| CN101135006B (en) * | 2006-08-28 | 2011-10-05 | 贵州世纪天元矿业有限公司 | Method for generating metal vacuum smelting protective gas |
| CN102389964A (en) * | 2011-11-11 | 2012-03-28 | 上海交通大学 | Magnesium alloy melt protector |
| CN103071780A (en) * | 2013-01-15 | 2013-05-01 | 西北工业大学 | Crucible for magnesium alloy directional solidification and preparation method of crucible |
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |