CN103983113B - The brickwork method of vacuum induction melting furnace - Google Patents
The brickwork method of vacuum induction melting furnace Download PDFInfo
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- CN103983113B CN103983113B CN201410205611.XA CN201410205611A CN103983113B CN 103983113 B CN103983113 B CN 103983113B CN 201410205611 A CN201410205611 A CN 201410205611A CN 103983113 B CN103983113 B CN 103983113B
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Abstract
A furnace drying method for vacuum induction melting furnace, for the preparation of hydrogen bearing alloy, is characterized in that, the implementation step of described furnace drying method is as follows: first at crucible bottom cushioning, then graphite core is suspended at crucible center; By first small-power preheating, middle power heating, more high-power heating, then change small-power cooling, bond firmly to make cupola drop material and crucible; By vacuumizing the vacuum pressure in checking stove; And the pressure recover in smelting furnace, to atmospheric pressure state, opens fire door and bell, take out graphite core.The present invention can improve smelting furnace crucible service life, reduce material cost, economize on resources.
Description
The application is a divisional application, and original applying number is 201210298933.4, and original application day is on August 21st, 2012, and former denomination of invention is " the brickwork method of vacuum induction melting furnace ".
Technical field
The present invention relates to a kind of brickwork method of vacuum induction melting furnace, belong to the technical field preparing hydrogen bearing alloy.
Background technology
At present, the phenomenon of the single pot life of vacuum induction melting furnace ubiquity not high, efficient resource waste.Service life of vacuum induction melting furnace crucible is except outside the Pass having with the own material of crucible, also closely related with the process of brickwork and baker, brickwork is high to the material of used refractory material, the placement location of refractory material and placement sequence requirement, adopt high power heating during baker, easily shorten the service life of smelting furnace crucible.
Summary of the invention
The object of this invention is to provide a kind of brickwork method of vacuum induction melting furnace, its can improve smelting furnace crucible service life, reduce material cost, economize on resources.
For this reason, the invention provides a kind of brickwork method of vacuum induction melting furnace, its brickwork method step is as follows:
(1) put into bottom induction coil by being pre-mixed evenly good cupola drop material layering, every layer of tamping number time, until the upper aspect of cupola drop material after fastening is consistent with the distance of fire door and crucible height;
(2) crucible is hung in induction coil, be placed on the center position of induction coil, make crucible outer wall surrounding equal with the distance of induction coil, and crucible opening part and converter nose mouth align;
(3) layering of cupola drop material is filled in the gap of induction coil and crucible equably, every layer of tamping number time;
(4) when cupola drop material off-line circle mouth preset distance after ramming, fill with wet cupola drop material, finally, a series of steam vent is set in the upper surface of wet cupola drop material;
(5) with wet cupola drop material, converter nose and mouth of pot are coupled together.
Preferably, the cupola drop material used is fused magnesite; The thickness of every layer is 70 ~ 80mm; At least tamping 3 times; Use hammer flattener tamping; Steam vent is pricked with instrument; Wet cupola drop material forms in the ratio hybrid modulation of 8:1 ~ 9:1 with cupola drop material and waterglass; Described preset distance is 190 ~ 210mm; And/or described a series of steam vent arranges a steam vent every 80 ~ 100mm, axial depth 140 ~ 150mm for enclosing around cupola drop material one.
Preferably, the content of the MgO of fused magnesite is more than 95%; Described preset distance is 200mm; The ratio hybrid modulation that wet cupola drop material joins 12kg waterglass with every 100kg cupola drop material forms; And/or the circle around cupola drop material arranges a steam vent every 100mm, and the degree of depth of steam vent is 150mm.
Preferably, the radial distance between the steam vent arranged around a circle of cupola drop material and the steam vent that arranges of adjacent turn is 100mm.
Preferably, further, first at crucible bottom cushioning, then graphite core is suspended at crucible center; By first small-power preheating, middle power heating, more high-power heating, then change small-power cooling, bond firmly to make cupola drop material and crucible; By vacuumizing the vacuum pressure in checking stove; Finally, the pressure recover in smelting furnace, to atmospheric pressure state, opens fire door and bell, takes out graphite core.
Preferably, with 30 ~ 50KW power preheating 2 ~ 3 hours, 40 ~ 60KW power heating 3 ~ 4 hours, 50 ~ 70KW power heating 2 ~ 3 hours, then, power is adjusted to 30 ~ 50KW lower the temperature, smelting furnace is closed stove evacuation simultaneously, lower the temperature after 1 ~ 1.5 hour, power is adjusted to zero, after 0.5 ~ 1 hour, by pressure recover in smelting furnace to normal pressure, graphite core is taken out in blow-on.
Preferably, with 40kW power preheating 2 hours, 50kW power heating 3 hours, 60kW power heating 2 hours, then, power is adjusted to 40kW and lowers the temperature, simultaneously, smelting furnace is closed stove evacuation, lower the temperature after 1 hour, power is adjusted to zero, after 0.5 ~ 1 hour, by the pressure recover in smelting furnace to normal pressure, graphite core is taken out in blow-on.
Preferably, described cushioning is the refractory material identical with crucible material; And/or described graphite core is cylindrical masses, diameter 350 ~ 450mm, high 120 ~ 140cm described graphite core has the aperture crossed, and described small pitch is from the upper end 250 ~ 300mm of graphite core.
Preferably, described cushioning is useless crucible material; The aperture of described aperture is 25 ~ 35mm; And/or, the diameter 400mm of described graphite core, high 135cm.
Preferably, described graphite core has the aperture crossed, aperture is 30mm, the upper end 300mm of pitch-row graphite core.
According to the present invention, the service life 10 can improving smelting furnace crucible more than stove, has saved resource, has reduced material cost.
Accompanying drawing explanation
Fig. 1 be according to vacuum induction melting furnace brickwork of the present invention after sectional view.
Fig. 2 is the structure chart according to vacuum induction melting furnace brickwork system of the present invention.
Detailed description of the invention
In FIG, Reference numeral 1 represents cupola drop material, Reference numeral 2 represents induction coil, Reference numeral 3 represents crucible, Reference numeral 4 represents the mixture of cupola drop material and waterglass, and Reference numeral 5 represents graphite core, and Reference numeral 6 represents bottom of furnace body, Reference numeral D represents the height of crucible, and Reference numeral d represents the height that wet cupola drop material is filled.
As shown in Figure 2, according to the brickwork system 100 of vacuum induction melting furnace of the present invention, for the preparation of hydrogen bearing alloy, it is characterized in that, described brickwork system comprises:
Cupola drop material injection device 10, it comprises the controlling of injecting quantity device 11, injects packer 12 and inject total height controller 13, this cupola drop material injection device 10 is the devices that will be pre-mixed bottom evenly good cupola drop material layering injection induction coil 2, and make every layer of tamping number time by packer, the controlling of injecting quantity device controls the thickness of every layer, and inject total height controller make the upper aspect of the cupola drop material after fastening and the distance of fire door and crucible 3 highly consistent;
Crucible lifting and positioner 20, its crucible hangs in induction coil 2, is placed on the center position of induction coil 2, make crucible outer wall surrounding equal with the distance of induction coil 2, and crucible opening part and converter nose mouth 21 aligns;
Cupola drop material filling device 30, it comprises loading controller 31, fills packer 32 and fill total height controller 33, this cupola drop material filling device is the device layering of cupola drop material be filled in equably in the gap of induction coil and crucible, and make every layer of tamping number time by filling packer, loading controller controls the thickness of every layer, and fills the cupola drop material off-line circle mouth predetermined distance d that total height controller makes through ramming;
Wet cupola drop material filling device 40, it, when cupola drop material off-line circle mouth preset distance after ramming, continues the gap of filling induction coil and crucible with wet cupola drop material;
Wet cupola drop material hole pricking device 50, it arranges a series of steam vent in the upper surface of wet cupola drop material;
Converter nose and mouth of pot sealing device 60, it connects converter nose and mouth of pot by wet cupola drop material.
In brickwork according to the present invention, use the fused magnesite containing more than 95% MgO as cupola drop material 1; And in baker according to the present invention, using the cylindrical solid graphite core 5 of diameter 400mm, high 135cm as calandria, graphite core 5 has the aperture crossed, aperture is 30mm, the upper end 300mm of pitch-row graphite core 5.
" aperture crossed " does lifting use, and object is that graphite core is suspended in crucible, and the size of graphite core is size according to crucible and determines, and diameter is less than the diameter of crucible, and the height of small pitch graphite core lower end is less than the height of crucible internal walls; The size of aperture is determined according to lifting device, and lifting device is penetrated.
In one embodiment, the concrete steps of brickwork method are as follows:
(1) will be pre-mixed evenly good cupola drop material 1 and put into the bottom of induction coil 2, namely every 70 ~ 80mm is thick uses hammer flattener tamping, at least smashes 3 times at every turn, and the upper aspect of the cupola drop material 1 after fastening is consistent with the height D of crucible 3 with the distance of fire door.
(2) crucible 3 is hung in induction coil 2, be placed on the center position of induction coil 2, make the outer wall surrounding of crucible 3 equal with the distance of induction coil 2, and the opening part of crucible 3 need align with converter nose mouth.
(3) cupola drop material 1 is uniformly filled in induction coil 2 with in the gap of crucible 3, it is thick to fill 70 ~ 80mm at every turn, then uses hammer flattener tamping, at least smashes three times at every turn.
(4) when the distance d of the cupola drop material 1 off-line circle mouth after ramming reaches 200mm, need fill with wet cupola drop material 4, wet cupola drop material 4 is that the ratio hybrid modulation of joining 12kg waterglass with every 100kg cupola drop material forms.
Finally, the circle around wet cupola drop material 4 pricks a steam vent every 100mm instrument, axial depth 150mm.
Upper aspect after wet cupola drop material 4 filling is the insertion point in hole, the direction of hole depth is axially, the selection of hole depth does not require to prick thoroughly, the diameter in hole is 2-3mm, prick the object in hole mainly in order to allow the CAB of populated wet cupola drop material inside disappear as far as possible, prevent in baker process, heating causes cupola drop material air pressure inside excessive and causes and break.Pricking hole is effective precautionary measures.
(5) smear waterglass in the side of smelting furnace guiding gutter and bottom, the material be stirred is put into the stainless steel tank of converter nose, is set level by converter nose, converter nose should aim at cast gate, uses the material be stirred converter nose and mouth of pot to be coupled together.
In brief, converter nose is put into the region that smelting furnace fixes, make converter nose aim at mouth of pot, and connect converter nose and mouth of pot with wet cupola drop material.
Crucible is used for holding material, and smelting furnace be perform heating, vacuumize, the equipment of all technological operations such as insufflation gas.During melting material, both is indispensable, and in " with smelting furnace melting material ", smelting furnace is the general designation comprising crucible.
Mouth of pot is a U-shaped structure, and converter nose two flank side surface is ladder structure of right angle, and bottom is an arcuate structure, and U-shaped structures different sized by rear and front end, to be wherein larger-sizely U-shapedly connected with mouth of pot with U-shaped the matching of mouth of pot.
In another embodiment, the cupola drop material after ramming, when the distance d of off-line circle mouth reaches 190 ~ 210mm, is filled with wet cupola drop material 4, and wet cupola drop material is formed in the ratio hybrid modulation of 8:1 ~ 9:1 cupola drop material and waterglass.Finally, enclose around cupola drop material one and prick a steam vent every 80 ~ 100mm instrument, the degree of depth 140 ~ 150mm.
Preferably, the cupola drop material used in described brickwork method is fused magnesite, and main component is MgO, and content is more than 95%.
In one embodiment, the concrete steps of furnace drying method are as follows:
(1) first put several pieces of useless crucible material in the bottom of crucible 3, then, graphite core is placed on crucible to center, graphite core 5 does not directly contact with sidewall of crucible with the bottom of crucible 3.
Crucible bottom puts into useless crucible material, and also can put into other refractory materials identical with crucible material, object ensures that graphite core does not directly contact with crucible bottom further, and direct contact can scorch crucible when high-power heating.
(2) with 40kW power preheating 2 hours, 50kW power heating 3 hours, 60kW power heating 2 hours, then, power is adjusted to 40kW lower the temperature, meanwhile, smelting furnace is closed stove evacuation, lower the temperature after 1 hour, power is adjusted to zero, after 0.5 ~ 1 hour, by the pressure recover in smelting furnace to normal pressure, graphite core 5 is taken out in blow-on.
" smelting furnace conjunction stove " refers to the closedown such as bell, fire door of smelting furnace, makes smelting furnace body of heater be in closed state.
In another embodiment, 30 ~ 50kW power preheating 2 ~ 3 hours, 40 ~ 60kW power heating 3 ~ 4 hours, 50 ~ 70kW power heating 2 ~ 3 hours, then, power is adjusted to 30 ~ 50kW and lowers the temperature, simultaneously, smelting furnace is closed stove evacuation, lower the temperature after 1 ~ 1.5 hour, power is adjusted to zero, after 0.5 ~ 1 hour, by pressure recover in smelting furnace to normal pressure, graphite core is taken out in blow-on.
Preferably, the graphite core used in described furnace drying method is cylindrical solid, diameter 350 ~ 450mm, and high 120 ~ 140cm graphite core has the aperture crossed, and aperture is 25 ~ 35mm, pitch-row graphite core upper end 250 ~ 300mm.
By first small-power preheating, middle power heating, more high-power heating, then, small-power is lowered the temperature, and front 3 steps slowly add power, rear 1 step-down low-power is to make cupola drop material and new crucible bond under temperature action firmly.
Vacuumize is to check that whether vacuum pressure in stove is in normal range (NR).
Finally, in smelting furnace, pressure recover is to atmospheric pressure state, and fire door, bell etc. just can open taking-up graphite core.So far, baker terminates.
Claims (8)
1. a furnace drying method for vacuum induction melting furnace, for the preparation of hydrogen bearing alloy, described vacuum induction melting furnace carries out brickwork by following steps:
(1) put into bottom induction coil by being pre-mixed evenly good cupola drop material layering, every layer of tamping number time, until the upper aspect of cupola drop material after fastening is consistent with the distance of fire door and crucible height;
(2) crucible is hung in induction coil, be placed on the center position of induction coil, make crucible outer wall surrounding equal with the distance of induction coil, and crucible opening part and converter nose mouth align;
(3) layering of cupola drop material is filled in the gap of induction coil and crucible equably, every layer of tamping number time;
(4) when cupola drop material off-line circle mouth preset distance after ramming, fill with wet cupola drop material, finally, a series of steam vent is set in the upper surface of wet cupola drop material;
(5) with wet cupola drop material, converter nose and mouth of pot are coupled together,
It is characterized in that, the implementation step of described furnace drying method is as follows:
First at crucible bottom cushioning, then graphite core is suspended at crucible center, described pad is the refractory material identical with crucible material;
By first small-power preheating, middle power heating, more high-power heating, then small-power cooling is changed, bond firmly to make cupola drop material and crucible, with 30 ~ 50KW power preheating 2 ~ 3 hours, 40 ~ 60KW power heating 3 ~ 4 hours, 50 ~ 70KW power heating 2 ~ 3 hours, then, power is adjusted to 30 ~ 50KW lower the temperature, smelting furnace is closed stove evacuation simultaneously, lower the temperature after 1 ~ 1.5 hour, power is adjusted to zero, after 0.5 ~ 1 hour, by pressure recover in smelting furnace to normal pressure, graphite core is taken out in blow-on;
By vacuumizing the vacuum pressure in checking stove, to check that whether vacuum pressure in stove is in normal range (NR);
Pressure recover in smelting furnace, to atmospheric pressure state, just can open fire door and bell, takes out graphite core.
2. furnace drying method as claimed in claim 1, is characterized in that, with 40kW power preheating 2 hours, 50kW power heating 3 hours, 60kW power heating 2 hours, then, power is adjusted to 40kW lower the temperature, meanwhile, smelting furnace is closed stove evacuation, lower the temperature after 1 hour, power is adjusted to zero, after 0.5 ~ 1 hour, by the pressure recover in smelting furnace to normal pressure, graphite core is taken out in blow-on.
3. furnace drying method as claimed in claim 1, it is characterized in that, described graphite core is cylindrical masses, diameter 350 ~ 450mm, and high 120 ~ 140cm described graphite core has the aperture crossed, and described small pitch is from the upper end 250 ~ 300mm of graphite core.
4. furnace drying method as claimed in claim 3, is characterized in that, described pad is useless crucible material; The aperture of described aperture is 25 ~ 35mm; And/or, the diameter 400mm of described graphite core, high 135cm.
5. furnace drying method as claimed in claim 4, it is characterized in that described graphite core there is the aperture crossed, aperture is 30mm, the upper end 300mm of pitch-row graphite core.
6. furnace drying method as claimed in claim 1, it is characterized in that, the cupola drop material used is fused magnesite; The thickness of every layer is 70 ~ 80mm; At least tamping 3 times; Use hammer flattener tamping; Steam vent is pricked with instrument; Wet cupola drop material forms in the ratio hybrid modulation of 8:1 ~ 9:1 with cupola drop material and waterglass; Described preset distance is 190 ~ 210mm; And/or described a series of steam vent arranges a steam vent every 80 ~ 100mm, axial depth 140 ~ 150mm for enclosing around cupola drop material one.
7. furnace drying method as claimed in claim 6, it is characterized in that, the content of the MgO of fused magnesite is more than 95%; Described preset distance is 200mm; The ratio hybrid modulation that wet cupola drop material joins 12kg waterglass with every 100kg cupola drop material forms; And/or the circle around cupola drop material arranges a steam vent every 100mm, and the degree of depth of steam vent is 150mm.
8. furnace drying method as claimed in claims 6 or 7, is characterized in that, the radial distance between the steam vent that the steam vent arranged around a circle of cupola drop material and adjacent turn are arranged is 100mm.
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| CN201410205611.XA CN103983113B (en) | 2012-08-21 | 2012-08-21 | The brickwork method of vacuum induction melting furnace |
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| CN201210298933.4A CN102788510B (en) | 2012-08-21 | 2012-08-21 | Method for constructing vacuum induction melting furnace |
| CN201410205611.XA CN103983113B (en) | 2012-08-21 | 2012-08-21 | The brickwork method of vacuum induction melting furnace |
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| CN201210298933.4A Division CN102788510B (en) | 2012-08-21 | 2012-08-21 | Method for constructing vacuum induction melting furnace |
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| CN103983113B true CN103983113B (en) | 2016-03-23 |
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| CN102798292A (en) * | 2012-09-10 | 2012-11-28 | 江西稀有稀土金属钨业集团有限公司 | Method for baking vacuum induction melting furnace |
| CN103553659B (en) * | 2013-10-15 | 2014-12-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Knotting method of straight cylindrical furnace lining for ferrovanadium smelting |
| CN103673619B (en) * | 2013-11-27 | 2016-01-20 | 福州文泰机械铸造有限公司 | One intermediate frequency furnace quartz sand brickwork method of high furnace life and using method |
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| CN109053172A (en) * | 2018-09-13 | 2018-12-21 | 丁杨洋 | A kind of medium-frequency induction furnace Dry vibrating material and preparation method thereof and application method |
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| CN109520305B (en) * | 2018-12-31 | 2024-04-12 | 广西玉柴机器股份有限公司 | Construction equipment and operation method for kiln nozzle of industrial smelting furnace |
| CN113048790A (en) * | 2021-05-05 | 2021-06-29 | 襄阳五二五泵业有限公司 | Furnace building method for forming crucible |
| CN115305569A (en) * | 2022-08-26 | 2022-11-08 | 长沙新立硅材料科技有限公司 | Device for smelting polycrystalline silicon in intermediate frequency furnace and using method |
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| CN103983113A (en) | 2014-08-13 |
| CN102788510B (en) | 2015-01-14 |
| CN102788510A (en) | 2012-11-21 |
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Effective date of registration: 20220210 Address after: 330096 No. 1117 innovation two road, hi tech Industrial Development Zone, Nanchang, Jiangxi Patentee after: JIANGXI JXTC HAOYUN HIGH-TECH CO.,LTD. Address before: No. 118, Beijing West Road, Jiangxi, Nanchang Patentee before: JIANGXI RARE EARTH AND RARE METALS TUNGSTEN Group Corp. |