CN103523784A - Ladle baking method in silicon smelting process - Google Patents
Ladle baking method in silicon smelting process Download PDFInfo
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- CN103523784A CN103523784A CN201310474971.5A CN201310474971A CN103523784A CN 103523784 A CN103523784 A CN 103523784A CN 201310474971 A CN201310474971 A CN 201310474971A CN 103523784 A CN103523784 A CN 103523784A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a ladle baking method in a silicon smelting process, is a ladle baking method using silicon ingot waste heat. First a special well for ladle baking is built, a heat collection plate is made, a center hole with a diameter less than that of a ladle is arranged on the heat collection plate, the heat collection plate is put above the ladle to enable a ladle opening and the ladle center hole on the heat collection to be concentric, during baking, a silicon ingot cooled to black is put on the heat collection plate, the silicon ingot covers right above the ladle to preheat the ladle, and then the demoulded high-temperature silicon ingot is used for baking the ladle. The method can solve the problems of long baking time, high labor intensity, poor working environment, high cost, environmental pollution and the like of traditional fuel ladle baking, and can effectively recycle silicon ingot waste heat resources.
Description
Technical field
The present invention relates to the baking method of two-maing ladle in a kind of silicon smelting process, belong to silicon smelting equipment design field.
Background technology
At silicon, smelt in production, two-maing ladle is one of very important casthouse equipment, two-man ladle and be generally conically shaped body, high 2400mm, end circular diameter 1800mm, upper circular diameter 2100mm, be mainly used in the high temperature silicon melt of 1470 ℃～1600 ℃ of splendid attire from emitting in electric furnace, two-man ladle in use, the bag end and bag wall are adhered to by the silicon melt of scouring and condensation on the one hand, because passing into oxygen, refining process causes the oxidation of two-maing ladle in various degree on the other hand, two-man ladle and using 9 heats to need to clear up and repair process after approximately 1 day, during reparation, need change the divider that is cast in the bottom equiblibrium mass distribution oxygen of two-maing ladle, and the bottom of two-maing ladle is built again.For bag wall, seriously by scouring or two-maing ladle of being badly damaged, be forced to, by remaining lining brick, adiabatic pouring material full scale clearance, again build by laying bricks or stones.Two-maing ladle of repairing must be toasted before coming into operation fully, stops moist two-maing ladle and puts into production use, in case the accident of blasting.
The known baking method of two-maing ladle is that two-maing ladle of repairing toppled over to placement, and the fuel such as firewood, charcoal head, coal are put into two-man ladle and light, by control, add fuel quantity that the intensity of a fire is adjusted into little fire → moderate heat → big fire three phases, the heat producing while utilizing fuel combustion carries out slowly baking 48 hours to two-maing ladle.In bake process, there is following problem in this method: the one, and occupied ground area is large; The 2nd, produce a large amount of smog, operating environment is poor; The 3rd, toast consuming time longlyer, newly building two-mans ladle needs baking 48 hours, and repairing two-mans ladle also needs to toast 24 hours, the 4th, labour intensity is large, need have special messenger to add fuel, and roasting bag is carried out 2 classes of operation systems, per tour configures 1 people, and baking finishes also to need the ashes in bag to remove, and stacks rear to environment; The 5th, baking cost is high, and so material, carrying fork truck, labour cost accumulative total reach 719.47 yuan/.
The silicon ingot temperature of casting in the smelting of mineral hot furnace silicon is produced is higher, silicon ingot just can carry out broken finishing operation after need cooling, because the cooling method that adopts is that spontaneous combustion is cooling, reach cooling time more than 5 hours, in process, lose a large amount of heat energy, known silicon does not all carry out effective recycling and causes a large amount of energy dissipations silicon ingot waste heat in smelting and producing.
Based on above technology status, knownly two-man ladle that baking method baking time is long, labour intensity is large, operating environment is severe, cost is high, contaminate environment.The waste heat that mineral hot furnace silicon is smelted in production process can not effectively utilize, and causes the serious waste of the energy.Adopt a kind of new baking method of two-maing ladle, solve problem that the bake process of two-maing ladle exists and traditional silicon smelt produce in the phenomenon of residual heat resources waste be the new approaches of dealing with problems.
Summary of the invention
The object of this invention is to provide the baking method that a kind of silicon smelting process is two-mand ladle, is a kind of method of utilizing silicon ingot waste heat to toast two-maing ladle.First build the special-purpose well that baking is two-mand ladle, make heat accumulate plate, on heat accumulate plate, open a centre hole that is less than the bag mouthful diameter of two-maing ladle, then heat accumulate plate is placed in to the top of two-maing ladle, the mouth that must make during placement to two-man ladle is coaxial with heat accumulate plate centre hole, first with the silicon ingot that is condensed to black, to two-maing ladle, carry out preheating, and then two-man ladle with the high temperature silicon ingot baking of the firm demoulding.This method can solve the roasting bag of traditional fuel and have the problems such as baking time is long, labour intensity is large, operating environment is severe, cost is high, contaminate environment, simultaneously also can effective recycling silicon ingot residual heat resources.
The present invention implements by following technical scheme:
At silicon, smelt casting place and build the special-purpose well that baking is two-mand ladle, make heat accumulate plate, on heat accumulate plate, open a centre hole that is less than the bag mouthful diameter of two-maing ladle, on centre hole steel plate surface around, build thermal insulation material, form the equipment that baking is two-mand ladle, first to be baked two-maing ladle put into special-purpose well, then heat accumulate plate is placed in to the top of two-maing ladle, the mouth that must make during placement to two-man ladle is coaxial with heat accumulate plate centre hole, , when baking, first with the silicon ingot that is condensed to black, be placed on heat accumulate plate, directly over allowing silicon ingot cover to two-man ladle, to two-maing ladle, carry out preheating, then with the high temperature silicon ingot baking of the firm demoulding, two-man ladle,
Described heat accumulate plate forms for cover the thermal insulation material that 80 mm are thick on the thick steel plate of 20 mm;
The formula of described thermal insulation material and making method are: with aluminate chamotte 15wt%, high-alumina fly 12wt%, the mud 30wt% that lights a fire, water 43wt%, after stirring, make thermal insulation material;
As shown in Figure 1, it comprises accumulated heat well 1 to the principle schematic that described baking is two-mand ladle, steel plate 2, and insulating material 3, accumulated heat well barricade 4, silicon ingot support 5, two-mans ladle 6, hot silicon ingot 7.
Compare and have advantages of with known technology
1. cost is low, with silicon ingot waste heat, toasts and two-mans ladle, and has not only realized the comprehensive reutilization of residual heat resources, and adds fuel without special messenger, and roasting being bundled into originally significantly declines, and by 719.47 yuan/, drops to 9.06 yuan/.
2. labour intensity is low, and traditional roasting mode not only will have special messenger to add fuel, also needs regularly the baking surface adjustment of two-maing ladle to be stirred.This method only need be changed the silicon ingot on heat accumulate plate by driving by existing operating personnel, belongs to mechanized operation, and labour intensity is low.
3. operation field standard, during baking, non smoke produces, and operating environment is better, has eliminated the pollution of ashes to environment.
4. baking time is short, and the baking time of two-maing ladle of reparation is 18 hours, and the baking 36 hours of two-maing ladle of newly building, has shortened 6-12 hour compared with traditional method.
Accompanying drawing explanation
Fig. 1 is baking principle schematic of the present invention.
In figure, 1 is accumulated heat well, and 2 is steel plate, and 3 is insulating material, and 4 is accumulated heat well barricade, and 5 is silicon ingot support, and 6 for two-maing ladle, and 7 is hot silicon ingot.
Embodiment
Embodiment 1: at silicon, smelt casting place and build long 6500 mm, wide 2900mm, high 2800mm can toast the special-purpose well of 2 requirements of two-maing ladle simultaneously, make long 3000mm simultaneously, wide 3000mm, thick is 2 of the heat accumulate plates of 100 mm, its center-hole diameter is 1700mm, the plate face of heat accumulate plate has possessed accumulated heat function, and centre hole has possessed heat transmission function; During operation, first to be baked two-maing ladle is positioned over to special-purpose well, then heat accumulate plate is placed in to the top of two-maing ladle, the mouth that must make during placement to two-man ladle is coaxial with heat accumulate plate centre hole, when baking, first with the silicon ingot that the temperature that is condensed to black is 400 ℃-600 ℃, to two-maing ladle, carry out preheating 3 times, each 2 hours, on heat accumulate plate, place the cooling silicon frame that a tradition is used, then by the temperature of the firm demoulding, be that 800 ℃ of-1050 ℃ of silicon ingots are positioned over heat accumulate plate baking and two-man ladle 6 times, each 2 hours, baking finishes, and will two-man ladle and hang out and put into production operation, then put into new roasting the two-maing ladle for the treatment of.
Embodiment 2: identical with embodiment 1 for other condition of the baking method of two-maing ladle to be baked newly laying, baking time and number of times are that while utilizing waste heat on silicon ingot to carry out preheating to two-maing ladle, every silicon ingot baking was changed after 2 hours, change 6 times; Preheating finishes to toast, and first on heat accumulate plate, places the cooling silicon frame that a tradition is used, and firm calcining temperature is positioned on cooling silicon frame and carries out high bake at the silicon ingot of 800 ℃-1050 ℃, and every silicon ingot baking was changed after 2 hours, changed 12 times.
Claims (3)
1. the baking method of two-maing ladle in a silicon smelting process, it is characterized in that: at silicon, smelt casting place and build the special-purpose well that baking is two-mand ladle, make heat accumulate plate, on heat accumulate plate, open a centre hole that is less than the bag mouthful diameter of two-maing ladle, on centre hole steel plate surface around, build thermal insulation material, form the equipment that baking is two-mand ladle, first to be baked two-maing ladle put into special-purpose well, then heat accumulate plate is placed in to the top of two-maing ladle, the mouth that must make during placement to two-man ladle is coaxial with heat accumulate plate centre hole, when baking, first with the silicon ingot that is condensed to black, be placed on heat accumulate plate, directly over allowing silicon ingot cover to two-man ladle, to two-maing ladle, carry out preheating, then with the high temperature silicon ingot baking of the firm demoulding, two-man ladle,
Described heat accumulate plate forms for cover the thermal insulation material that 80 mm are thick on the thick steel plate of 20 mm;
The formula of described thermal insulation material and making method are: with aluminate chamotte 15wt%, high-alumina fly 12wt%, the mud 30wt% that lights a fire, water 43wt%, after stirring, make thermal insulation material.
2. the baking method of two-maing ladle in a kind of silicon smelting process according to claim 1, it is characterized in that: at silicon, smelt casting place and build long 6500 mm, wide 2900mm, high 2800mm can toast the special-purpose well of 2 requirements of two-maing ladle simultaneously, make long 3000mm simultaneously, wide 3000mm, thick is 100 mm, 2 of heat accumulate plates, the thickness of described heat accumulate plate comprise steel plate thick be 20 mm, thermal insulation material is thick is 80 mm, its center-hole diameter is 1700mm, the plate face of heat accumulate plate has possessed accumulated heat function, and centre hole has possessed heat transmission function; During operation, first to be baked two-maing ladle is positioned over to special-purpose well, then heat accumulate plate is placed in to the top of two-maing ladle, the mouth that must make during placement to two-man ladle is coaxial with heat accumulate plate centre hole, when baking, first with the silicon ingot that the temperature that is condensed to black is 400 ℃-600 ℃, be placed on heat accumulate plate top and carry out preheating 3 times to two-maing ladle, each 2 hours, then by the temperature of the firm demoulding, be that 800 ℃ of-1050 ℃ of silicon ingots bakings are two-mand ladle 6 times, each 2 hours, baking finishes, to two-man ladle and hang out and put into production operation, then put into new roasting the two-maing ladle for the treatment of.
3. the baking method of two-maing ladle in a kind of silicon smelting process according to claim 1, is characterized in that: for to be baked the two-maing ladle during preheating newly laying, every silicon ingot baking was changed after 2 hours, changed 6 times; Preheating finishes to toast, and first on heat accumulate plate, places the cooling silicon frame that a tradition is used, and firm calcining temperature is positioned on cooling silicon frame and carries out high bake at the silicon ingot of 800 ℃-1050 ℃, and every silicon ingot baking was changed after 2 hours, changed 12 times.
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| CN103523784B CN103523784B (en) | 2015-02-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108946736A (en) * | 2018-07-23 | 2018-12-07 | 云南省龙陵县龙山硅有限责任公司 | A kind of baking method two-mand ladle in silicon smelting process |
| CN113383979A (en) * | 2021-06-11 | 2021-09-14 | 青海西部水电有限公司 | Novel vacuum ladle lining baking process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1166451A (en) * | 1997-06-12 | 1997-12-03 | 炎陵县铁合金厂 | Out-furnace refining technology for industrial silicon |
| CN201449148U (en) * | 2009-02-19 | 2010-05-05 | 吉首市汇锋矿业有限责任公司 | Furnace lining baking cover |
| CN101724900A (en) * | 2009-11-24 | 2010-06-09 | 厦门大学 | Device and method for purifying polycrystalline silicon |
| CN103101912A (en) * | 2013-02-04 | 2013-05-15 | 福建兴朝阳硅材料股份有限公司 | Polycrystalline silicon preparation method |
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2013
- 2013-10-12 CN CN201310474971.5A patent/CN103523784B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1166451A (en) * | 1997-06-12 | 1997-12-03 | 炎陵县铁合金厂 | Out-furnace refining technology for industrial silicon |
| CN201449148U (en) * | 2009-02-19 | 2010-05-05 | 吉首市汇锋矿业有限责任公司 | Furnace lining baking cover |
| CN101724900A (en) * | 2009-11-24 | 2010-06-09 | 厦门大学 | Device and method for purifying polycrystalline silicon |
| CN103101912A (en) * | 2013-02-04 | 2013-05-15 | 福建兴朝阳硅材料股份有限公司 | Polycrystalline silicon preparation method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108946736A (en) * | 2018-07-23 | 2018-12-07 | 云南省龙陵县龙山硅有限责任公司 | A kind of baking method two-mand ladle in silicon smelting process |
| CN108946736B (en) * | 2018-07-23 | 2020-06-16 | 云南省龙陵县龙山硅有限责任公司 | Ladle baking method in silicon smelting process |
| CN113383979A (en) * | 2021-06-11 | 2021-09-14 | 青海西部水电有限公司 | Novel vacuum ladle lining baking process |
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| CN103523784B (en) | 2015-02-04 |
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