CN1225404C - Method and apparatus for smeltering silica carbide - Google Patents
Method and apparatus for smeltering silica carbide Download PDFInfo
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- CN1225404C CN1225404C CN 03120398 CN03120398A CN1225404C CN 1225404 C CN1225404 C CN 1225404C CN 03120398 CN03120398 CN 03120398 CN 03120398 A CN03120398 A CN 03120398A CN 1225404 C CN1225404 C CN 1225404C
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Abstract
The present invention provides a method and a device for smelting silica carbide. A smelting furnace is a resistance furnace, reaction materials are a carbonaceous material and a silicon dioxide material, and the reaction materials are mixed and are arranged at the periphery of a furnace core which is composed of graphite powder. The insulation material of the smelting furnace is divided into an inner layer composed of spent material and part of the reaction material and an outer layer composed of particular silica sand material, and the silicon dioxide raw material in the reaction material is the particular silica sand material roasted at a high temperature by the last furnace. The smelting method can strengthen the ventilation properties of heat insulating material, make the silicon dioxide raw material desired by the reaction materials to be roasted, and improve the furnace yield.
Description
Technical field
The present invention relates to a kind of smelting process of silicon carbide, particularly a kind of novel method with the roasting material silicon carbide smelting.
Background technology
Mainly also adopting Acheson's method in the existing silicon carbide production, promptly pack into around the stove heart of resistance furnace by carbonaceous material and thin silica sand material, is 1.4 to 1.7 blended materials by silicon carbon ratio, and the energising heating makes it produce chemical reaction, generates silicon carbide.Substantially have two kinds on the shove charge method, a kind of is virgin material method (virgin material of compositions such as silica sand and carbonaceous material is contained in the furnace bottom of smelting furnace, carries out roasting when smelting, the reaction zone of next heat of after coming out of the stove these " roasting materials " being packed into).Though this method can be removed the fugitive constituent of carbonaceous material in the compound, water water cooling and the process of coming out of the stove in just have the loss of a certain amount of carbonaceous material, also infiltrated a certain amount of impurity simultaneously, quality product is reduced, the material consumption increases.China ZL96118927.4 disclosed " producing the method for silicon carbide with resistance furnace " is that insulation material is only adopted silica sand one component, silica sand used in the reaction material was for to use twice at least as insulation material, and the corresponding at least twice pure silicon sand insulation material that cools and handle of doing of water.Though this method than the insulation material good permeability that is mixed with the black carbon material some, still, be difficult to carry out aborning, its shortcoming be pure silicon sand insulation material when coming out of the stove can and unreacted reaction material mix naturally.Because the required degree of a degree of " pure silicon sand insulation material " and reaction material is identical, so unreacted carbonaceous material can't be separated, when making " pure silicon sand insulation material " and carbonaceous material proportioning misalignment as next heat reaction material.
The objective of the invention is to overcome the deficiency of above-mentioned technology, a kind of ventilation property that can strengthen lagging material is provided, can make silica material required in the reaction material be able to roasting again, and can improve the silicon carbide smelting novel method of furnace output.
Summary of the invention
The present invention realizes by following technique means:
A kind of method of silicon carbide smelting, its smelting furnace is a resistance furnace, reaction material is carbonaceous material and earth silicon material, reaction material is 1.4 to 1.7 to be contained in after mixing around the stove heart by silicon carbon ratio, the stove heart is made up of Graphite Powder 99, smelting furnace insulation material branch is served as reasons and is lacked the internal layer that material is formed, skin with particle silica sand material composition, particle silica sand material granularity is between 6-100mm, silica material in the reaction material is through the hard burned particle silica sand of last heat material, and hard burned particle silica sand material is that reprocessing is broken into the thin silica sand material that granularity is 1-8mm after sieving.
The weight ratio of described internal layer and outer insulation material is between 1/7-1/2.
Silica weight required in the particle silica sand material in the described outer insulation material, weight and reaction material is identical.
The present invention has following advantage:
1. adopt the macrobead silica sand as insulation material, make the thermal insulation layer ventilation property better, reduced the air pressure in the stove, improved the speed of response in the stove, therefore reduced melting electric consumption.
2. because insulation material has adopted inside and outside two layers of different insulation material, in smelting, the impurity in the reaction material is arranged in a row in the internal layer insulation material, after smelting end, in the process of coming out of the stove, cleaned out, avoid impurity occurring in the outer particulate material and add up, prevented the secondary pollution of reaction material.
3. because insulation material has adopted macrobead silica sand material, the carbonaceous material of sneaking in the insulation material after smelting is come out of the stove is separated it through screening, the internal layer insulation material that again these is had " weary material " next heat of packing into of carbonaceous material and thin silica sand material, because the macrobead silica sand promptly becomes purer silica sand material after screening, so thin silica sand material and carbonaceous material after the reprocessing fragmentation are accomplished accurate proportioning.
4. because the effect of internal layer insulation material can prevent outer particle silica sand material near the high-temperature zone, and be melted that the bulk of congealing into causes spillage of material after the blowing out cooling.
5. because the enhancing of insulation material ventilation property, being incubated the bed of material aborning can thicken, and makes furnace wall away from the high-temperature zone, avoids furnace wall Yin Gaowen and is out of shape or burns out.
Description of drawings
Resistance furnace inner section synoptic diagram when Fig. 1 produces silicon carbide smelting for the present invention.
Fig. 2 is a spacer plate box structural representation of the present invention.
Embodiment one:
As shown in Figure 1, the device of this silicon carbide smelting is made of furnace wall 5, furnace bottom 8, furnace core body 1, and furnace wall 5 stands on the furnace bottom 8, and both sides furnace wall and furnace bottom surround the charge district jointly.Smelting furnace is a resistance furnace, is electrode in the furnace core body 1, and furnace wall 5 is double-deck, is CO gas combustion chamber 6 in the interlayer, and 8 pairs of furnace bottoms are called trapezoidal, are provided with CO gas combustion chamber 7 in it.
When initial, the granularity of packing in trapezoidal furnace bottom 8 is the particle silica sand material of 6-30mm, charge level is in the arc-shaped, the silicon carbon ratio of directly packing within it is 1.4 reaction material, it is smooth to make it charge level, install furnace wall 5, lifted spacer plate box, with Graphite Powder 99 furnace core body 1 position of packing into, the reaction material of packing in the inboard and outer space at spacer plate box, the particle silica sand material of in the space between furnace wall and the spacer plate box, packing into, spacer plate box is proposed, reaction material is dressed up trapezoidal, be paved with particle silica sand material in the trapezoidal reaction material outside, to constitute insulation jointly outer with the particle silica sand material of bottom, sidepiece.Shove charge finishes, the energising heating is smelted to reacting and is finished substantially, have a power failure, question response stops, lay down furnace wall after the cooling, insulation material is watered water for cooling, finish the operation of coming out of the stove, also remaining not reaction material, unreacted reaction material and the hard burned particle silica sand material of complete reaction behind the output finished product silicon carbide.To be left thing and sieve, screen underflow is the reaction material of not complete reaction, unreacted reaction material, is referred to as weary material; Screen overflow is hard burned particle silica sand material, after reprocessing is broken into the thin silica sand material that granularity is 0-4mm, and the silica material during for normal operation in the reaction material.
During normal the operation, the granularity of packing in trapezoidal furnace bottom 8 is the particle silica sand material of 6-30mm, and charge level is in the arc-shaped, and the weary material of dress one deck is also in the arc-shaped on arc, constitutes internal layer insulation material 3.Be 1.4 reaction material 2 again with the silicon carbon ratio of packing in the arc, it is smooth to make it charge level.Install furnace wall 5, lifted spacer plate box, with Graphite Powder 99 furnace core body 1 position of packing into, the reaction material 2 of in the space of spacer plate box inboard, packing into, the weary material of packing in the outer space of spacer plate box constitutes internal layer insulation material 3.The particle silica sand material of packing in the space between furnace wall and the spacer plate box constitutes outer insulation material 4.The weight ratio of internal layer insulation material 3 and outer insulation material 4 is 1/7, and silica weight required in the weight of the particle silica sand material in its mesectoderm insulation material and the reaction material 2 is basic identical.Above-mentioned reaction material 2 is carbonaceous material and earth silicon material, and wherein the silica material in the reaction material passes through the hard burned particle silica sand of heat material just.
After finishing above-mentioned operation, spacer plate box is proposed.Again reaction material is contained in the furnace charge middle and upper part, reaches pre-determined quantity, with granularity be again the particle silica sand material of 6-30mm be contained in reaction material above, reach pre-determined quantity.The energising heating is smelted to reacting and is finished substantially; Have a power failure; Question response stops; Lay down furnace wall 5 after the cooling; Insulation material is watered water for cooling; Finish the operation of coming out of the stove, behind the output finished product silicon carbide, remaining thing is sieved, screen underflow is weary material, and as the internal layer insulation material of next heat, screen overflow is hard burned particle silica sand material, processing is broken into the thin silica sand material of 0-4mm, as the silicon-dioxide material in next heat reaction material.
So operational process is finished in circulation.
Embodiment two:
As shown in Figure 1, the device of this silicon carbide smelting is made of furnace wall 5, furnace bottom 8, furnace core body 1, and furnace wall 5 stands on the furnace bottom 8, and both sides furnace wall and furnace bottom surround the charge district jointly.Smelting furnace is a resistance furnace, is electrode in the furnace core body 1, and furnace wall 5 is double-deck, is CO gas combustion chamber 6 in the interlayer, and 8 pairs of furnace bottoms are called trapezoidal, are provided with CO gas combustion chamber 7 in it.
When initial, the granularity of packing in trapezoidal furnace bottom 8 is the particle silica sand material of 20-80mm, charge level is in the arc-shaped, the silicon carbon ratio of directly packing within it is 1.4 reaction material, it is smooth to make it charge level, install furnace wall 5, lifted spacer plate box, with Graphite Powder 99 furnace core body 1 position of packing into, the reaction material of packing in the inboard and outer space at spacer plate box, the particle silica sand material of in the space between furnace wall and the spacer plate box, packing into, spacer plate box is proposed, reaction material is dressed up trapezoidal, be paved with particle silica sand material in the trapezoidal reaction material outside, to constitute insulation jointly outer with the particle silica sand material of bottom, sidepiece.Shove charge finishes, the energising heating is smelted to reacting and is finished substantially, have a power failure, question response stops, lay down furnace wall after the cooling, insulation material is watered water for cooling, finish the operation of coming out of the stove, also remaining not reaction material, unreacted reaction material and the hard burned particle silica sand material of complete reaction behind the output finished product silicon carbide.To be left thing and sieve, screen underflow is the reaction material of not complete reaction, unreacted reaction material, is referred to as weary material; Screen overflow is hard burned particle silica sand material, after reprocessing is broken into the thin silica sand material that granularity is 1-6mm, and the silica material during for normal operation in the reaction material.
During normal the operation, the granularity of packing in trapezoidal furnace bottom 8 is the particle silica sand material of 20-80mm, and charge level is in the arc-shaped, and the weary material of dress one deck is also in the arc-shaped on arc, constitutes internal layer insulation material 3.Be 1.6 reaction material 2 again with the silicon carbon ratio of packing in the arc, it is smooth to make it charge level.Install furnace wall 5, lifted spacer plate box, with Graphite Powder 99 furnace core body 1 position of packing into, the reaction material 2 of in the space of spacer plate box inboard, packing into, the weary material of packing in the outer space of spacer plate box constitutes internal layer insulation material 3.The particle silica sand material of packing in the space between furnace wall and the spacer plate box constitutes outer insulation material 4.The weight ratio of internal layer insulation material 3 and outer insulation material 4 is 1/4, and silica weight required in the weight of the particle silica sand material in its mesectoderm insulation material and the reaction material 2 is basic identical.Above-mentioned reaction material 2 is carbonaceous material and earth silicon material, and wherein the silica material in the reaction material passes through the hard burned particle silica sand of heat material just.
After finishing above-mentioned operation, spacer plate box is proposed.Again reaction material is contained in the furnace charge middle and upper part, reaches pre-determined quantity, with granularity be again the particle silica sand material of 20-80mm be contained in reaction material above, reach pre-determined quantity.The energising heating is smelted to reacting and is finished substantially; Have a power failure; Question response stops; Lay down furnace wall 5 after the cooling; Insulation material is watered water for cooling; Finish the operation of coming out of the stove, behind the output finished product silicon carbide, remaining thing is sieved, screen underflow is weary material, and as the internal layer insulation material of next heat, screen overflow is hard burned particle silica sand material, processing is broken into the thin silica sand material of 1-6mm, as the silicon-dioxide material in next heat reaction material.
So operational process is finished in circulation.
Embodiment three:
As shown in Figure 1, the device of this silicon carbide smelting is made of furnace wall 5, furnace bottom 8, furnace core body 1, and furnace wall 5 stands on the furnace bottom 8, and both sides furnace wall and furnace bottom surround the charge district jointly.Smelting furnace is a resistance furnace, is electrode in the furnace core body 1, and furnace wall 5 is double-deck, is CO gas combustion chamber 6 in the interlayer, and 8 pairs of furnace bottoms are called trapezoidal, are provided with CO gas combustion chamber 7 in it.
When initial, the granularity of packing in trapezoidal furnace bottom 8 is the particle silica sand material of 50-100mm, charge level is in the arc-shaped, the silicon carbon ratio of directly packing within it is 1.7 reaction material, it is smooth to make it charge level, install furnace wall 5, lifted spacer plate box, with Graphite Powder 99 furnace core body 1 position of packing into, the reaction material of packing in the inboard and outer space at spacer plate box, the particle silica sand material of in the space between furnace wall and the spacer plate box, packing into, spacer plate box is proposed, reaction material is dressed up trapezoidal, be paved with particle silica sand material in the trapezoidal reaction material outside, to constitute insulation jointly outer with the particle silica sand material of bottom, sidepiece.Shove charge finishes, the energising heating is smelted to reacting and is finished substantially, have a power failure, question response stops, lay down furnace wall after the cooling, insulation material is watered water for cooling, finish the operation of coming out of the stove, also remaining not reaction material, unreacted reaction material and the hard burned particle silica sand material of complete reaction behind the output finished product silicon carbide.To be left thing and sieve, screen underflow is the reaction material of not complete reaction, unreacted reaction material, is referred to as weary material; Screen overflow is hard burned particle silica sand material, after reprocessing is broken into the thin silica sand material that granularity is 3-8mm, and the silica material during for normal operation in the reaction material.
During normal the operation, the granularity of packing in trapezoidal furnace bottom 8 is the particle silica sand material of 50-100mm, and charge level is in the arc-shaped, and the weary material of dress one deck is also in the arc-shaped on arc, constitutes internal layer insulation material 3.Be 1.7 reaction material 2 again with the silicon carbon ratio of packing in the arc, it is smooth to make it charge level.Install furnace wall 5, lifted spacer plate box, with Graphite Powder 99 furnace core body 1 position of packing into, the reaction material 2 of in the space of spacer plate box inboard, packing into, the weary material of packing in the outer space of spacer plate box constitutes internal layer insulation material 3.The particle silica sand material of packing in the space between furnace wall and the spacer plate box constitutes outer insulation material 4.The weight ratio of internal layer insulation material 3 and outer insulation material 4 is 1/2, and silica weight required in the weight of the particle silica sand material in its mesectoderm insulation material and the reaction material 2 is basic identical.Above-mentioned reaction material 2 is carbonaceous material and earth silicon material, and wherein the silica material in the reaction material passes through the hard burned particle silica sand of heat material just.
After finishing above-mentioned operation, spacer plate box is proposed.Again reaction material is contained in the furnace charge middle and upper part, reaches pre-determined quantity, with granularity be again the particle silica sand material of 50-100mm be contained in reaction material above, reach pre-determined quantity.The energising heating is smelted to reacting and is finished substantially; Have a power failure; Question response stops; Lay down furnace wall 5 after the cooling; Insulation material is watered water for cooling; Finish the operation of coming out of the stove, behind the output finished product silicon carbide, remaining thing is sieved, screen underflow is weary material, and as the internal layer insulation material of next heat, screen overflow is hard burned particle silica sand material, processing is broken into the thin silica sand material of 3-8mm, as the silicon-dioxide material in next heat reaction material.
So operational process is finished in circulation.
Claims (3)
1. the method for a silicon carbide smelting, its smelting furnace is a resistance furnace, reaction material is carbonaceous material and earth silicon material, reaction material is 1.4 to 1.7 to be contained in after mixing around the stove heart by silicon carbon ratio, the stove heart is made up of Graphite Powder 99, the internal layer that it is characterized in that serving as reasons smelting furnace insulation material branch weary material forms, skin with particle silica sand material composition, particle silica sand material granularity is between 6-100mm, silica material in the reaction material is through the hard burned particle silica sand of last heat material, and hard burned particle silica sand material is that reprocessing is broken into the thin silica sand material that granularity is 1-8mm after sieving.
2. the method for silicon carbide smelting as claimed in claim 1, the weight ratio that it is characterized in that described internal layer and outer insulation material is between 1/7-1/2.
3. the method for silicon carbide smelting as claimed in claim 1 is characterized in that particle silica sand material in the described outer insulation material, and silica weight required in weight and the reaction material is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03120398 CN1225404C (en) | 2002-06-11 | 2003-03-18 | Method and apparatus for smeltering silica carbide |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02122377 CN1392118A (en) | 2002-06-11 | 2002-06-11 | Method and device for smelting silicon carbide |
| CN02122377.7 | 2002-06-11 | ||
| CN 03120398 CN1225404C (en) | 2002-06-11 | 2003-03-18 | Method and apparatus for smeltering silica carbide |
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| Publication Number | Publication Date |
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| CN1449995A CN1449995A (en) | 2003-10-22 |
| CN1225404C true CN1225404C (en) | 2005-11-02 |
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| CN 03120398 Expired - Fee Related CN1225404C (en) | 2002-06-11 | 2003-03-18 | Method and apparatus for smeltering silica carbide |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101648709B (en) * | 2008-08-16 | 2011-09-14 | 贾玉东 | Method for smelting environmentally-friendly silicon carbide grinding materials |
| CN102234110B (en) * | 2011-06-10 | 2016-12-21 | 青海星言商贸有限公司 | Silicon carbide environment protection smelting process and device thereof |
| CN103553044B (en) * | 2013-10-12 | 2015-07-08 | 台州市一能科技有限公司 | Preparation method of high-purity silicon carbide |
| CN104045085A (en) * | 2014-02-14 | 2014-09-17 | 鸡西市兴中科技有限公司 | Novel smelting composting method of vacuum temperature-control pressure-regulating silicon carbide smelting furnace |
| CN103964441B (en) * | 2014-05-13 | 2015-12-09 | 神华集团有限责任公司 | Utilize the method for dust-removing powder silicon carbide smelting |
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