CN103523784B - Ladle baking method in silicon smelting process - Google Patents
Ladle baking method in silicon smelting process Download PDFInfo
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- CN103523784B CN103523784B CN201310474971.5A CN201310474971A CN103523784B CN 103523784 B CN103523784 B CN 103523784B CN 201310474971 A CN201310474971 A CN 201310474971A CN 103523784 B CN103523784 B CN 103523784B
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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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
Smelt in production at silicon, 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 DEG C ~ 1600 DEG C that splendid attire is released 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, the oxidation of two-maing ladle in various degree is caused on the other hand because refining process passes into oxygen, namely two-man ladle needs after about 1 day to carry out clearing up and repair process at use 9 heat, the divider being cast in bottom equiblibrium mass distribution oxygen of two-maing ladle need be changed during reparation, and 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 accident of blasting.
Known baking method of two-maing ladle is that two-maing ladle of repairing is toppled over placement, and the fuel such as firewood, charcoal head, coal are put into two-man ladle light, by controlling to add fuel quantity, the intensity of a fire being adjusted to little fire → moderate heat → big fire three phases, utilizing the heat produced during fuel combustion to carry out slowly baking 48 hours to two-maing ladle.There is following problem in this method: one is that occupied ground area is large in bake process; Two is produce a large amount of smog, and operating environment is poor; Three is that baking is consuming time longer, and newly building two-mans ladle need toast 48 hours, and repairing two-mans ladle also needs baking 24 hours, four is that labour intensity is large, special messenger need be had to add fuel, roasting bag implementation 2 classes of operation systems, per tour configures 1 people, and baking terminates also to need the ashes in bag to remove, and gives environment after stacking; Five is that baking cost is high, and so material, carrying fork truck, labour cost add up to reach 719.47 yuan/.
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 adopted is spontaneous combustion cooling, reach more than 5 hours cooling time, large losses heat energy in process, known silicon does not all carry out effective recycling to silicon ingot waste heat in smelting and producing and causes a large amount of energy dissipations.
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.Waste heat in mineral hot furnace silicon smelt production can not effectively utilize, and causes the serious waste of the energy.Adopt a kind of baking method of two-maing ladle newly, the phenomenon solving residual heat resources waste in two-man ladle bake process Problems existing and traditional silicon smelting production is 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 utilizing silicon ingot waste heat to toast two-maing ladle.First build the special well toasting and two-man ladle, make heat accumulate plate, heat accumulate plate is opened the centre hole that is less than bag mouth diameter of two-maing ladle, then heat accumulate plate is placed in 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 carry out preheating with the silicon ingot being condensed to black to two-maing ladle, and then two-man ladle with the high temperature silicon ingot baking of the firm demoulding.This method can solve traditional fuel and bake bag and there is 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 waste heat resource.
The present invention implements by following technical scheme:
Smelt casting place at silicon and build the special well toasting and two-man ladle, make heat accumulate plate, heat accumulate plate is opened the centre hole that is less than bag mouth diameter of two-maing ladle, steel plate surface around centre hole builds thermal insulation material, form the equipment toasting and two-man ladle, first special well is put in be baked two-maing ladle, then heat accumulate plate is placed in 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 be placed on heat accumulate plate with the silicon ingot being condensed to black when toasting, directly over allowing silicon ingot cover to two-man ladle, preheating is carried out to two-maing ladle, then two-man ladle with the high temperature silicon ingot baking of the firm demoulding,
Described heat accumulate plate is on the thick steel plate of 20 mm, cover the thick thermal insulation material of 80 mm form;
The formula of described thermal insulation material and making method are: make thermal insulation material with aluminate chamotte 15wt%, high-alumina fly 12wt%, the mud 30wt% that lights a fire, water 43wt% after stirring;
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, insulating material 3, accumulated heat well barricade 4, and silicon ingot support 5, two-mans ladle 6, hot silicon ingot 7.
The advantage had compared with known technology
1. cost is low, carries out baking and two-mans ladle, not only achieve the comprehensive reutilization of residual heat resources, and add fuel without the need to special messenger by silicon ingot waste heat, and roasting being bundled into originally significantly declines, and drops to 9.06 yuan/by 719.47 yuan/.
2. labour intensity is low, traditional roasting mode, and special messenger not only will be had to add fuel, also needs regularly to carry out adjustment to the baking surface of two-maing ladle and stirs.This method only need by existing operating personnel by the silicon ingot on driving replacing heat accumulate plate, and belong to mechanized operation, labour intensity is low.
3. operation field specification, during baking, non smoke produces, and operating environment is better, eliminates 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, comparatively traditional method shortens 6-12 hour.
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: smelt casting place at silicon and build long 6500 mm, wide 2900mm, high 2800mm can toast the special well of 2 requirements of two-maing ladle simultaneously, make long 3000mm simultaneously, wide 3000mm, thick is the heat accumulate plate 2 pieces of 100 mm, and 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 special well, then heat accumulate plate is placed in 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 preheating is carried out 3 times with the silicon ingot that the temperature being condensed to black is 400 DEG C-600 DEG C to two-maing ladle when toasting, each 2 hours, heat accumulate plate is placed the cooling silicon frame that a tradition uses, then with the temperature of the firm demoulding be 800 DEG C of-1050 DEG C of silicon ingots be positioned over heat accumulate plate baking two-man ladle 6 times, each 2 hours, baking terminates, and will two-man ladle and hang out and operation of putting into production, then put into new wait to bake two-man ladle.
Embodiment 2: identical with embodiment 1 for other condition of the baking method of two-maing ladle to be baked newly laid, baking time and number of times are change after when utilizing the waste heat on silicon ingot to carry out preheating to two-maing ladle, every block silicon ingot toasts 2 hours, change 6 times; Preheating terminates to toast, on heat accumulate plate, first place the cooling silicon frame that a tradition uses, and is positioned on cooling silicon frame by firm calcining temperature and carries out high bake, change, change 12 times after every block silicon ingot toasts 2 hours at the silicon ingot of 800 DEG C-1050 DEG C.
Claims (3)
1. the baking method of two-maing ladle in a silicon smelting process, it is characterized in that: smelt casting place at silicon and build the special well toasting and two-man ladle, make heat accumulate plate, heat accumulate plate is opened the centre hole that is less than bag mouth diameter of two-maing ladle, steel plate surface around centre hole builds thermal insulation material, form the equipment toasting and two-man ladle, first special well is put in be baked two-maing ladle, then heat accumulate plate is placed in 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 be placed on heat accumulate plate with the silicon ingot being condensed to black when toasting, directly over allowing silicon ingot cover to two-man ladle, preheating is carried out to two-maing ladle, then two-man ladle with the high temperature silicon ingot baking of the firm demoulding,
Described heat accumulate plate is on the thick steel plate of 20 mm, cover the thick thermal insulation material of 80 mm form;
The formula of described thermal insulation material and making method are: make thermal insulation material with aluminate chamotte 15wt%, high-alumina fly 12wt%, the mud 30wt% that lights a fire, water 43wt% after stirring.
2. the baking method of two-maing ladle in a kind of silicon smelting process according to claim 1, it is characterized in that: smelt casting place at silicon and build long 6500 mm, wide 2900mm, high 2800mm can toast the special well of 2 requirements of two-maing ladle simultaneously, make long 3000mm simultaneously, wide 3000mm, thick is 100 mm, heat accumulate plate 2 pieces, it is 20 mm that the thickness of described heat accumulate plate comprises steel plate thick, and thermal insulation material is thick is 80 mm, and 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 special well, then heat accumulate plate is placed in 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 be placed on above heat accumulate plate with the silicon ingot that the temperature being condensed to black is 400 DEG C-600 DEG C when toasting and carry out preheating 3 times to two-maing ladle, each 2 hours, then be that the baking of 800 DEG C of-1050 DEG C of silicon ingots is two-mand ladle 6 times by the temperature of the firm demoulding, each 2 hours, baking terminates, to two-man ladle and hang out and operation of putting into production, then put into and new treat roasting two-maing ladle.
3. the baking method of two-maing ladle in a kind of silicon smelting process according to claim 1, is characterized in that: for newly lay to be baked two-man ladle preheating time, change after every block silicon ingot toasts 2 hours, change 6 times; Preheating terminates to toast, on heat accumulate plate, first place the cooling silicon frame that a tradition uses, and is positioned on cooling silicon frame by firm calcining temperature and carries out high bake, change, change 12 times after every block silicon ingot toasts 2 hours at the silicon ingot of 800 DEG C-1050 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310474971.5A CN103523784B (en) | 2013-10-12 | 2013-10-12 | Ladle baking method in silicon smelting process |
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| CN103523784B true CN103523784B (en) | 2015-02-04 |
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| 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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| 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 |
| CN101724900B (en) * | 2009-11-24 | 2012-05-23 | 厦门大学 | Device and method for purifying polycrystalline silicon |
| CN103101912B (en) * | 2013-02-04 | 2014-07-09 | 福建兴朝阳硅材料股份有限公司 | Polycrystalline silicon preparation method |
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