CN102816938A - Reducing furnace for smelting magnesium by electrothermal method - Google Patents
Reducing furnace for smelting magnesium by electrothermal method Download PDFInfo
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- CN102816938A CN102816938A CN2012103080687A CN201210308068A CN102816938A CN 102816938 A CN102816938 A CN 102816938A CN 2012103080687 A CN2012103080687 A CN 2012103080687A CN 201210308068 A CN201210308068 A CN 201210308068A CN 102816938 A CN102816938 A CN 102816938A
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Abstract
The invention relates to a reducing furnace for smelting magnesium by an electrothermal method. The reducing furnace comprises a furnace body, crystallizers and a heating element. The reducing furnace is characterized in that the furnace body consists of a furnace casing, a large cover and a slag outlet, wherein the large cover is arranged at the upper part of the furnace casing and is connected with the furnace casing in a sealing manner; the slag outlet is arranged at the bottom of the furnace casing; the furnace casing is of a cylinder shape of which the bottom is conical; a sphere material inlet is formed in the top of the large cover; a flame retardant coating is arranged on the inner wall of the furnace body; two sets of crystallizers are arranged at the upper part of the side wall of the furnace casing in a lateral symmetry manner; the heating element is cylindrical; the whole heating element is repeatedly bent into multiple sections of mutually-parallel heating elements which are uniformly arranged at intervals according to the length; a heating element section between every two mutually-connected heating units is a circular arc transitional section; and two end heads of the heating element are connected with binding posts arranged on the furnace body. The reducing furnace has the advantages that the mechanical operation of loading, discharging slag and discharging magnesium is realized, the work efficiency is increased, the labor intensity of workers is relieved and the effects of high efficiency and energy saving and the goal of clean production are achieved.
Description
Technical field:
The present invention relates to a kind of electric heating process magnesium smelting reducing stove, belong to metallurgy industry electrothermal oven field.
Background technology:
The method that Britain scientist faraday in 1833 has invented with the electrolysis molten magnesium chloride makes pure metal magnesium; Just began suitability for industrialized production through the arduous experimental study in 53 years in 1886 again in Germany; Later on, just become the main method of world today's magnesium production through the continuous improvement in more than 100 years, perfect.But the Today's World People more and more is concerned about under the situation that build environment pollutes, and thisly emits a large amount of chlorine electrolysis refining magnesium methods and more and more do not allowed by people.
The nineteen forty-one Canada much professor Pi Jiang of many logical sequences (L.M.Pidgeoll) have at first created with silicon iron reduction rhombspar refining magnesium pilot plant, and succeed.The fifties, generally adopted countries in the world.Because to have the type of furnace simple, less investment, production process such as grasp well at advantage, so development is very fast.It is external heating that this method adopts high temperature steel retort 3Cr24Ni7N.The jar accumbency in Reaktionsofen, can be divided into single or double retort, or to tinning, during with coal or gas-fired≤1200 ℃, under vacuum condition, carry out Mgo+Si → Mg+SiO
2Replacement(metathesis)reaction.The magnesium steam that generates (450-550 ℃) in mold forms crystallization magnesium.The maximum shortcoming of Pidgeon process is that (high temperature steel retort) cost is high, consumption is big.Especially to the later stage, the retort modification, feeding quantity reduces, and magnesium producing rate is reduced, and has increased cost, wastes energy, and serious dust pollution and abominable work situation have limited the development of a lot of magnesium factory.
Summary of the invention:
The purpose of this invention is to provide a kind of electricity consumption method for smelting magnesium by hot replace a reduction jar refining magnesium, body of heater capacity big, energy-efficient, produce clean, maintenance is convenient and feed, slag tap, go out the electric heating process magnesium smelting reducing stove that magnesium is operated full mechanization.
The objective of the invention is to realize in the following manner:
The present invention includes body of heater, mold, heating element; It is characterized in that: body of heater by furnace shell be located at the big lid that furnace shell top and furnace shell are tightly connected; And the slag notch formation that is located at the furnace shell bottom seals, furnace shell is that the bottom is the round shape of conical surface, is provided with the goal material mouth of sealing at the top of big lid; Be provided with one deck flame retardant coating at inboard wall of furnace body; The symmetrical two cover molds that are equipped with on the top of the sidewall of furnace shell, heating element is cylindrical, whole heating element is bent into the evenly spaced heat-generating units that multistage is parallel to each other repeatedly by equal length; Heating element section between interconnective heat-generating units is the arc transition section, and two terminations of heating element are connected with the terminal stud on being located at body of heater.
On the outer wall of said furnace shell, be enclosed with and vacuumize thermofin;
The medullary ray of said mold is 1.3～1.5 meters apart from the distance of furnace shell cylindrical wall bottom;
The heat-generating units of said cylindrical heating element is vertically arranged in furnace shell, its highly be higher than mold medullary ray, be lower than the upper wall of mold;
The diameter of said cylindrical heating element is 30～40mm;
Width between centers is 110mm between the adjacent heat-generating units of said heating element.
Advantage of the present invention is: realized charging, slagged tap, go out the mechanize that magnesium is operated, improved working efficiency, alleviated working strength of workers, reduced the operator in a large number, reached energy-efficient effect and clean target of producing; Build the refining magnesium factory of equal scale, the reduction plant floor space reduces, investment reduces, and need not reduce jar, and the cycle of founding the factory can shorten greatly, and heat energy makes full use of.
Description of drawings:
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the distribution schematic diagram of heating element in furnace shell.
Among the figure: 1, score material mouthful, 2, Da Gai, 3, valve tube, 4, mold, 5, thermofin, 6, be uniformly distributed with pellet, 7, heating element, 8, furnace shell, 9, slag notch, 10, terminal stud, 11, flame retardant coating, 12, crystallization magnesium.
Embodiment:
With reference to accompanying drawing; The present invention includes body of heater, mold 4, heating element 7, body of heater by furnace shell 8 be located at the big lid 2 that furnace shell top and furnace shell are tightly connected, and be located at slag notch 9 formations of furnace shell bottom with flange seal; Furnace shell 8 is the round shape of conical surface for the bottom; Boiler coiled sheet with thickness 20mm is welded into type, and internal diameter is 1260mm, and effectively work loading height is 1200mm.Big lid 2 is conical, adopts flange to be connected with furnace shell, can open to mention and put into Heating element (heating element), and sealing.Top at big lid 2 is provided with the goal material mouth 1 with flange seal; Be provided with the whole liner flame retardant coating 11 that forms with the refractory materials ramming of one deck at inboard wall of furnace body; The thickness of flame retardant coating 11 is 150mm; The symmetrical two cover molds 4 that are equipped with on the top of the sidewall of furnace shell, the medullary ray of mold 4 is 1.3 meters apart from the distance of furnace shell cylindrical wall bottom; Heating element 7 is cylindrical; Whole heating element is bent into the evenly spaced heat-generating units that multistage is parallel to each other repeatedly by equal length; Heating element section between interconnective heat-generating units is the arc transition section, and two terminations of heating element 7 are connected (direct supply) with the terminal stud on being located at body of heater.Width between centers is 110mm between the adjacent heat-generating units of heating element, and the heat-generating units spacing is 70mm (heating element diameter 40mm), on the outer wall of furnace shell 2, is enclosed with one deck and vacuumizes thermofin 5.
The present invention adopts the electric heating process Mg-smelting furnace of electric heating body refining magnesium, to replace the reduction furnace that adopts reduction jar refining magnesium in the production of magnesium by pidgeonprocess.Existing reduction furnace is with material 3Cr24Ni7N, internal diameter ∮ 325-∮ 370mm, and wall thickness 30mm, the reduction jar accumbency of long 2.6m-3.1m is in stove; Can single or upper and lower row in the stove staggeredly put into many reduction jar, wherein maximum problem is the difficulty of slagging tap, and the time is long; Because≤1200 ℃ vacuumize and are easy to flat jar, the charging difficulty, magnesium producing rate reduces; It is high to make reduction jar cost, and work-ing life is short, is called as high dust, highly energy-consuming production.Shell of the present invention is welded into type with the boiler coiled sheet, and liner is smash the bed of material by the high temperature resistance fire proofed wood, and insulation and shell are heat insulation by vacuum layer; Inner suitable for reading is charging opening by heating element element heat balls material, and end opening is a slag notch; The side is two magnesium molds; Total system is the vacuum system of 1-13Pa, and Heating temperature makes production operation all realize mechanize at 1100-1200 ℃.Every stove can be adorned refining magnesium ball material 0.8-1.5t/ platform, and closing a reduction jar charging tube is that 5-10 props up jar, and the electric heating process Mg-smelting furnace is saved floor space greatly, and the coal gas amount reduces does not have reduction jar consumption, has obviously improved the magnesium rate, has realized that type of furnace volume is little, and heat energy consumption is low.
After reduction furnace of the present invention divided professional machine-shaping with each composition member, integral body was suppressed leak detection, and whole furnace body frame is located on the two layer operation platforms 13, and the body of heater bottom is 2m overhead.Mold 4 tops connect valve tube 3; Thereby be connected with vacuum system; In furnace shell, add the goal material through the material mouth of scoring, the ball material is uniformly distributed between the heating element, two terminal studs 10 that bottom of furnace body stretches out are connected on the electrical control cubicles; The electronic slag car of walking is set under the slag notch, and energized can put into production use.Damage as heating element occurring in the production,, change one group of electric heating body, can resume production as long as tear body of heater integral body open handling between tool car.
Claims (6)
1. electric heating process magnesium smelting reducing stove; Comprise body of heater, mold, heating element, it is characterized in that: body of heater by furnace shell be located at the big lid that furnace shell top and furnace shell are tightly connected, and the slag notch formation that is located at the furnace shell bottom seals; Furnace shell is that the bottom is the round shape of conical surface; Be provided with the goal material mouth of sealing at the top of big lid, be provided with one deck flame retardant coating, at the symmetrical two cover molds that are equipped with in top of the sidewall of furnace shell at inboard wall of furnace body; Heating element is cylindrical; Whole heating element is bent into the evenly spaced heat-generating units that multistage is parallel to each other repeatedly by equal length, and the heating element section between interconnective heat-generating units is the arc transition section, and two terminations of heating element are connected with the terminal stud on being located at body of heater.
2. electric heating process magnesium smelting reducing stove according to claim 1 is characterized in that: on the outer wall of said furnace shell, be enclosed with and vacuumize thermofin.
3. electric heating process magnesium smelting reducing stove according to claim 1 is characterized in that: the medullary ray of said mold is 1.3～1.5 meters apart from the distance of furnace shell cylindrical wall bottom.
4. electric heating process magnesium smelting reducing stove according to claim 3 is characterized in that: the heat-generating units of said cylindrical heating element is vertically arranged in furnace shell, its highly be higher than mold medullary ray, be lower than the upper wall of mold.
5. electric heating process magnesium smelting reducing stove according to claim 4 is characterized in that: the diameter of said cylindrical heating element is 30～40mm.
6. electric heating process magnesium smelting reducing stove according to claim 5 is characterized in that: width between centers is 110mm between the adjacent heat-generating units of said heating element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103080687A CN102816938A (en) | 2012-08-22 | 2012-08-22 | Reducing furnace for smelting magnesium by electrothermal method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012103080687A CN102816938A (en) | 2012-08-22 | 2012-08-22 | Reducing furnace for smelting magnesium by electrothermal method |
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| CN102816938A true CN102816938A (en) | 2012-12-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177313A (en) * | 2015-08-21 | 2015-12-23 | 山西八达镁业有限公司 | Inside-outside heating magnesium metal reduction heating method |
| CN113584306A (en) * | 2021-08-09 | 2021-11-02 | 刘海永 | Application of vacuum carbon tube furnace for smelting magnesium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2400458Y (en) * | 1999-12-28 | 2000-10-11 | 王恩民 | Vertical magnesium-smelting reduction furnace |
| CN1345982A (en) * | 2000-09-29 | 2002-04-24 | 于洪喜 | Internal heating method magnesium-smelting productive technology and equipment |
| CN1827808A (en) * | 2006-03-24 | 2006-09-06 | 东北大学 | Inner resistance heating metallothermic reduction furnace for melting magnesium |
| CN1974805A (en) * | 2006-12-18 | 2007-06-06 | 北京科技大学 | Metal magnesium reducing furnace with internally heating radiation tube |
| CN200964433Y (en) * | 2006-10-26 | 2007-10-24 | 陕西西科博尔科技有限责任公司 | Internal heat type-multiple heat source-electric heating method magnesium metal reducing furnace |
| CN101857924A (en) * | 2010-06-19 | 2010-10-13 | 鹤壁银龙有色金属科技有限公司 | Tank-free vertical electric smelting metallic magnesium reduction furnace |
-
2012
- 2012-08-22 CN CN2012103080687A patent/CN102816938A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2400458Y (en) * | 1999-12-28 | 2000-10-11 | 王恩民 | Vertical magnesium-smelting reduction furnace |
| CN1345982A (en) * | 2000-09-29 | 2002-04-24 | 于洪喜 | Internal heating method magnesium-smelting productive technology and equipment |
| CN1827808A (en) * | 2006-03-24 | 2006-09-06 | 东北大学 | Inner resistance heating metallothermic reduction furnace for melting magnesium |
| CN200964433Y (en) * | 2006-10-26 | 2007-10-24 | 陕西西科博尔科技有限责任公司 | Internal heat type-multiple heat source-electric heating method magnesium metal reducing furnace |
| CN1974805A (en) * | 2006-12-18 | 2007-06-06 | 北京科技大学 | Metal magnesium reducing furnace with internally heating radiation tube |
| CN101857924A (en) * | 2010-06-19 | 2010-10-13 | 鹤壁银龙有色金属科技有限公司 | Tank-free vertical electric smelting metallic magnesium reduction furnace |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177313A (en) * | 2015-08-21 | 2015-12-23 | 山西八达镁业有限公司 | Inside-outside heating magnesium metal reduction heating method |
| CN105177313B (en) * | 2015-08-21 | 2018-07-13 | 山西八达镁业有限公司 | A kind of magnesium metal reduction heating means of interior external heat |
| CN113584306A (en) * | 2021-08-09 | 2021-11-02 | 刘海永 | Application of vacuum carbon tube furnace for smelting magnesium |
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Application publication date: 20121212 |