CN1211894A - Internal heater with performance of resisting corrosion of molten zinc - Google Patents
Internal heater with performance of resisting corrosion of molten zinc Download PDFInfo
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- CN1211894A CN1211894A CN 98117359 CN98117359A CN1211894A CN 1211894 A CN1211894 A CN 1211894A CN 98117359 CN98117359 CN 98117359 CN 98117359 A CN98117359 A CN 98117359A CN 1211894 A CN1211894 A CN 1211894A
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- molten zinc
- resisting corrosion
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Abstract
An internal heater resisting against corrosion of molten zinc can be used to heat the molten zinc in zinc-plating container. Its external sleeve tube is made up of metallic material able to resist against corrosion of molten zinc and having high mechanical stength. It features no corrosion in molten zinc at 700 deg.C and high strength to resist against the extrusion force caused by solidification of molten zinc and the accident collision with other workpiece.
Description
The present invention relates to heater, particularly a kind of anti-zinc erosion heater that is used in the galvanized pot.
The heater that is used for heating in the hot galvanizing is at present made the outer tube of resisting corrosion of molten zinc by Inorganic Non-metallic Materials such as quartz glass, carborundum, silicon nitride or graphite etc., and interior dress calandria is made.Because these material fragilities are big, fragile, the life-span is low, is difficult to be used for industrial production.Therefore, mode of heating is failed desirable the realization always in the hot galvanizing.
Purpose of the present invention is promptly to solve that the heater jacket tube material fragility that exists in the above-mentioned prior art is big, fragile, the life-span is low, be difficult to be used for the problem of aspects such as industrial production, and a kind of internal heater with performance of resisting corrosion of molten zinc of making its outer tube with particulate metal material is provided.
The objective of the invention is to be achieved through the following technical solutions:
A kind of internal heater with performance of resisting corrosion of molten zinc that can insert direct Heating Zn in the galvanized pot, mainly form by extraction electrode (1), head protector (2), adjusting nut (3), upper press cover (4) and outer tube (5), electric heating tube (6) is housed in outer tube (5), outer tube (5) is to be made by the metal material with good resisting corrosion of molten zinc performance and higher mechanical strength, between outer tube (5) and electric heating tube (6) heat carrier (7) is housed also.The metal material of making outer tube (5) is by anti-zinc erosion layer (5
1) and intensity supporting layer (5
2) form, said anti-zinc erosion layer (5
1) be through rare-earth element modified FeB intermetallic compound, said intensity supporting layer (5
2) be the ordinary carbon steel pipe.Said have following two kinds through rare-earth element modified FeB intermetallic compound and the forming method between the ordinary carbon steel pipe:
A. thermal diffusion method: by the method that solid boron-rare earth element oozes altogether, the boron atom is infiltrated the ordinary carbon steel tube-surface, boriding process is: 950 ℃ 15 hours, the boriding medium prescription is: boron supplying agent B
4C 5～20%wt, activator KBF
45～15%wt, catalyst (30%NH
4BF
4+ 70%NH
4Cl) 0.5～2%wt, malleableize agent rare earth cerium alloy 2～8%wt, surplus SiC carries out 1100 ℃ of eutectic processing of 0.5 hour subsequently;
B. powder metallurgic method: at first utilize atomization to make through rare-earth element modified FeB powder, the powder process prescription is ferro-boron 89%wt, pure iron 10%wt, cerium mischmetal alloy 1%wt; The die mould prescription is iron powder 15%wt, MODIFIED Fe B powder 85%wt; Behind two kinds of powder mixings behind die mould on the ordinary carbon steel pipe sintering; Sintering process is:
(1) is warming up to 900 ℃ of insulations 20 minutes by normal temperature in the stove
(2) continue to be warming up to 1000 ℃ of insulations 10 minutes
(3) continue to be warming up to 1100 ℃ of insulations 10 minutes
(4) continue to be warming up to 1200 ℃ of insulations 10 minutes
(5) continue to be warming up to 1220 ℃ of insulations 10 minutes
(6) continue to be warming up to 1240 ℃ of insulations 30 minutes
(7) cooling
The metal material of making outer tube (5) is the molybdenum and tungsten alloy plied timber, and it is made of double layer of metal, comprising resisting corrosion of molten zinc layer (5
1) and intensity supporting layer (5
2); Resisting corrosion of molten zinc layer (5
1) be to use powder metallurgic method compression moulding, material composition is the rare earth cerium alloy of Mo 68～70%wt, W 28～29%wt and 0.5～4.5%wt; Intensity supporting layer (5
2) by the fusion casting moulding, its material is made of simple metal such as copper, aluminium, zinc, lead, cadmium, nickel etc. or their alloy, finally makes the metal plied timber that possesses good resisting corrosion of molten zinc performance and sufficiently high mechanical strength simultaneously after two layers of material is compound.
The present invention has the following advantages and effect:
The heater that utilizes this resisting corrosion of molten zinc metal plied timber to make can be for a long time soaks in the zinc liquid below 700 ℃ and is not corroded.And its mechanical strength is far above other resisting corrosion of molten zinc metal material and nonmetallic materials.With its as the heating element of hot-dip galvanized pan can be desirable the realization hot galvanizing in mode of heating.
Compare with present external heating mode, the interior mode of heating of realizing with this heater can economize on electricity more than 30%, joint zinc 10～15%, and the life-span of zinc pot is improved about 10 times.
The drawing of accompanying drawing is described as follows:
Fig. 1 is an internal heater with performance of resisting corrosion of molten zinc structure chart of the present invention
Fig. 2 is the A portion enlarged drawing of Fig. 1
Fig. 3 is sintering process figure
Be described further below in conjunction with drawings and Examples:
Internal heater with performance of resisting corrosion of molten zinc of the present invention illustrated in figures 1 and 2 mainly is made up of extraction electrode 1, head protector 2, adjusting nut 3, upper press cover 4 and outer tube 5 etc., electric heating tube 6 is housed in outer tube 5, calandria 8 and insulating packing 9 are arranged in electric heating tube 6, calandria 8 is actually a kind of heating wire, its upper end joins by lead and extraction electrode 1, between electric heating tube 6 and outer tube 5 heat carrier 7 is housed.Outer tube 5 is by anti-zinc erosion layer 5
1With intensity supporting layer 5
2Form, can make by following two kinds of schemes:
Scheme 1: through rare-earth element modified FeB intermetallic compound, forming method has two:
A. thermal diffusion method: promptly the method for oozing altogether by solid boron-rare earth element infiltrates the boron atom as intensity supporting layer 5
2The ordinary carbon steel tube-surface.Boriding process is: 950 ℃ * 15h, the boriding medium prescription is: boron supplying agent B
4C 15%wt, activator KBF
410%wt, catalyst (30%NH
4BF
4+ 70%NH
4Cl) 1.5%wt, malleableize agent rare earth cerium alloy 5%wt, surplus SiC carries out the eutecticization of 1100 ℃ * 0.5h subsequently.
B. powder metallurgic method: at first utilize atomization to make: the powder process prescription: ferro-boron (boracic 23.8%) 89%wt through rare-earth element modified FeB powder; Pure iron 10%wt; Cerium mischmetal alloy 1%wt.Die mould prescription: iron powder 15%wt; MODIFIED Fe B powder 85%wt.Behind two kinds of powder mixings, as intensity supporting layer 5
2The ordinary carbon steel pipe on sintering behind the die mould.Sintering process is:
Be warming up to 900 ℃ of insulations 20 minutes by normal temperature in the stove
Continue to be warming up to 1000 ℃ of insulations 10 minutes
Continue to be warming up to 1100 ℃ of insulations 10 minutes
Continue to be warming up to 1200 ℃ of insulations 10 minutes
Continue to be warming up to 1220 ℃ of insulations 10 minutes
Continue to be warming up to 1240 ℃ of insulations 30 minutes
Cooling
Scheme 2: the molybdenum and tungsten alloy plied timber: it is made of double layer of metal, comprising resisting corrosion of molten zinc layer 5
1With intensity supporting layer 5
2Resisting corrosion of molten zinc layer 5
1Be to use powder metallurgic method compression moulding, material composition is the rare earth cerium alloy of Mo 70%wt, W 29%wt and 1%wt; Intensity supporting layer 5
2By the fusion casting moulding, its material is made of simple metal such as copper, aluminium, zinc, lead, cadmium, nickel etc. or their alloy, finally makes the metal plied timber that possesses good resisting corrosion of molten zinc performance and sufficiently high mechanical strength simultaneously after two layers of material is compound.
Claims (5)
1. one kind can be inserted the interior directly internal heater with performance of resisting corrosion of molten zinc of Heating Zn of galvanized pot, mainly form by extraction electrode (1), head protector (2), adjusting nut (3), upper press cover (4) and outer tube (5), electric heating tube (6) is housed in outer tube (5), it is characterized in that: outer tube (5) is to be made by the metal material with good resisting corrosion of molten zinc performance and higher mechanical strength, between outer tube (5) and electric heating tube (6) heat carrier (7) is housed also.
2. internal heater with performance of resisting corrosion of molten zinc according to claim 1 is characterized in that: the metal material of making outer tube (5) is by anti-zinc erosion layer (5
1) and intensity supporting layer (5
2) form.
3. internal heater with performance of resisting corrosion of molten zinc according to claim 1 is characterized in that: said anti-zinc erosion layer (5
1) be through rare-earth element modified FeB intermetallic compound, said intensity supporting layer (5
2) be the ordinary carbon steel pipe.
4. internal heater with performance of resisting corrosion of molten zinc according to claim 3 is characterized in that: said have following two kinds through rare-earth element modified FeB intermetallic compound and the forming method between the ordinary carbon steel pipe:
A. thermal diffusion method: by the method that solid boron-rare earth element oozes altogether, the boron atom is infiltrated the ordinary carbon steel tube-surface, boriding process is: 950 ℃ 15 hours, the boriding medium prescription is: boron supplying agent B
4C5～20%wt, activator KBF
45～15%wt, catalyst (30%NH
4BF
4+ 70%NH
4Cl) 0.5～2%wt, malleableize agent rare earth cerium alloy 2～8%wt, surplus SiC carries out 1100 ℃ of eutectic processing of 0.5 hour subsequently;
B. powder metallurgic method: at first utilize atomization to make through rare-earth element modified FeB powder, the powder process prescription is ferro-boron 89%wt, pure iron 10%wt, cerium mischmetal alloy 1%wt; The die mould prescription is iron powder 15%wt, MODIFIED Fe B powder 85%wt; Behind two kinds of powder mixings behind die mould on the ordinary carbon steel pipe sintering; Sintering process is:
(1) is warming up to 900 ℃ of insulations 20 minutes by normal temperature in the stove
(2) continue to be warming up to 1000 ℃ of insulations 10 minutes
(3) continue to be warming up to 1100 ℃ of insulations 10 minutes
(4) continue to be warming up to 1200 ℃ of insulations 10 minutes
(5) continue to be warming up to 1220 ℃ of insulations 10 minutes
(6) continue to be warming up to 1240 ℃ of insulations 30 minutes
(7) cooling
5. internal heater with performance of resisting corrosion of molten zinc according to claim 1 is characterized in that: the metal material of making outer tube (5) is the molybdenum and tungsten alloy plied timber, and it is made of double layer of metal, comprising resisting corrosion of molten zinc layer (5
1) and intensity supporting layer (5
2); Resisting corrosion of molten zinc layer (5
1) be to use powder metallurgic method compression moulding, material composition is the rare earth cerium alloy of Mo 68～70%wt, W 28～29%wt and 0.5～4.5%wt; Intensity supporting layer (5
2) by the fusion casting moulding, its material is made of simple metal such as copper, aluminium, zinc, lead, cadmium, nickel etc. or their alloy, finally makes the metal plied timber that possesses good resisting corrosion of molten zinc performance and sufficiently high mechanical strength simultaneously after two layers of material is compound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98117359 CN1094716C (en) | 1998-08-21 | 1998-08-21 | Internal heater with performance of resisting corrosion of molten zinc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98117359 CN1094716C (en) | 1998-08-21 | 1998-08-21 | Internal heater with performance of resisting corrosion of molten zinc |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1211894A true CN1211894A (en) | 1999-03-24 |
| CN1094716C CN1094716C (en) | 2002-11-20 |
Family
ID=5225489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98117359 Expired - Fee Related CN1094716C (en) | 1998-08-21 | 1998-08-21 | Internal heater with performance of resisting corrosion of molten zinc |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1094716C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1387016A (en) * | 2002-04-02 | 2002-12-25 | 上海交通大学 | Heater coated with non-crystal viscose glass enamel |
| CN104363671A (en) * | 2014-10-31 | 2015-02-18 | 天津市工大镀锌设备有限公司 | Inner heater of liquid zinc corrosion resistance alloy |
-
1998
- 1998-08-21 CN CN 98117359 patent/CN1094716C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1387016A (en) * | 2002-04-02 | 2002-12-25 | 上海交通大学 | Heater coated with non-crystal viscose glass enamel |
| CN104363671A (en) * | 2014-10-31 | 2015-02-18 | 天津市工大镀锌设备有限公司 | Inner heater of liquid zinc corrosion resistance alloy |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1094716C (en) | 2002-11-20 |
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| CF01 | Termination of patent right due to non-payment of annual fee |