CN204594254U - A kind of coreless armature electric melting magnesium furnace - Google Patents
A kind of coreless armature electric melting magnesium furnace Download PDFInfo
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- CN204594254U CN204594254U CN201520112585.6U CN201520112585U CN204594254U CN 204594254 U CN204594254 U CN 204594254U CN 201520112585 U CN201520112585 U CN 201520112585U CN 204594254 U CN204594254 U CN 204594254U
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Abstract
The utility model relates to coreless armature electric melting magnesium furnace, comprise kiln car, kiln car is laid kiln bucket, petticoat pipe is provided with above kiln bucket, the central area of kiln bucket is provided with 2 ~ 6 electrodes, an electrode is had at least to be provided with the centre bore running through whole electrode in these electrodes, centre bore is connected with powder feeder by powder delivering pipe, powder feeder is connected with high-pressure air source with powder temporary storing bin respectively, also be provided with block material above kiln bucket to feed intake passage, feed intake passage and screening machine one exports and is connected block material, another outlet of screening machine is connected with powder temporary storing bin by powder carry passage.The blanking respectively that this electric melting magnesium furnace can realize powder and block material enters stove, there will not be paulin material phenomenon and spray stove phenomenon; Further, can not airborne dust be caused, improve raw material availability, decrease environmental pollution; Meanwhile, do not need pelletizing or briquetting technique, reduce the consumption of manpower and the energy.
Description
Technical field
The utility model belongs to technical field of smelting, relates to a kind of magnesium electric smelting smelting device, particularly relates to a kind of coreless armature electric melting magnesium furnace.
Background technology
Magnesia refractories is important foundation material and the backing material of hot industry, is widely used in the high temperature industry such as iron and steel, coloured, building materials, oil, chemical industry, environmental protection.Recent two decades comes, and under the promotion of high temperature Industry Quick Development, magnesia refractories achieves significant progress and progress.Under the theory of low-carbon (LC), low energy consumption, environmental protection, green, function, as the magnesia refractories industry supporting hot industry, enter important transitional period, development in science and technology based on autonomous innovation will become the chief motivation of magnesia refractories, to realize magnesia refractories industry from low cost, low-cost resource, the increasing of cheap labour, the growth pattern of the more high added value under Technical Innovation To Promote.
Fused magnesite is the expensive goods in magnesia refractories, is that melting in Submerged-arc Furnace obtains with magnisite stone or light calcined magnesia particle.What obtain with giobertite melting is common electric melting magnesia, and what obtain with light calcined magnesia melting is large crystallization fused magnesite.Fused magnesite has the advantages such as purity is high, crystallization large, compact structure, resistance to slag are strong, good thermal shock stability, is the important source material of steelmaking converter, electric furnace and refining ladle slag line high-grade magnesia brick, magnesia carbon brick and amorphous refractory.Low iron large crystallization fused magnesite or excellent high temperature electrical insulation material.
China's magnesite resource enriches, and proved reserves are 35.64 hundred million tons at present, account for 28.7% of world's gross reserves, occupy first place in the world, and magnesite resource is the important strategic reserved resource of China.
But domestic fused magnesia smelting technological level is generally low, and production equipment is simple and crude, the type of furnace decades still determine by rule of thumb without large change by thermal regulation and operational procedure, and production process is mainly by controlling manually, energy waste, flue gas, serious dust pollution of the environment.Produce one ton of common electric melting magnesia power consumption and be about 3000kwh, produce the power consumption of one ton of large crystallization fused magnesite and be about 2600kwh.Therefore, whole electric-melting magnesium industry urgently strategy upgrading.
What electric-melting magnesium melting adopted is frit (also crying molten sticking together) method.Be no matter the common electric-melting magnesium of the direct melting of raw material " one-step method " with ore, or take caustic-calcined magnesite as the large crystallization electric-melting magnesium of " two step method " of raw material, the smelting furnace pattern of use is identical.All uncovered high petticoat pipe at present, with circular metal bucket for body of heater (kiln bucket).Three carbonaceous electrodes are hung down in round iron bucket, after energising striking, use manually charging feedstock around electrode arc light, are buried by arclight.Raw material is fused into liquid under the effect of arclight heat.Once expose arc light, just feed again.Remain and do not reveal arc light, until a heat melting is complete.Along with raw material constantly loads, melts, the liquid level in body of heater constantly raises, and for keeping arclight to stablize, electrode also will along with raising.When on electrode lifting to metal bucket along (i.e. fire door) time, a heat melting terminates.Under normal circumstances, a heat melting 10 hours.
In traditional smelting process of electro-fused magnesia furnace, raw material is piecemeal material and powder not, is all from the upper end of kiln bucket or with manually or with machinery dropping into the surrounding them in kiln bucket.The electrode of electric melting magnesium furnace is only used to conduct electrical power thus produces electric arc.Tradition is fed into stove method regardless of powder, block material, is block material and powder to be mixed to add in stove.Due to the existence of powder, cause raw material bed permeability in stove bad, occur paulin material phenomenon, or occur liquation splash, namely spray stove phenomenon.And powder very easily causes airborne dust being added in the process in stove, is taken away, causes a large amount of dust collection powder, reduce the utilization rate of raw material by dedusting fan.The powder that some producers produce to utilize dust-removing powder and raw material fragmentation, the technology and equipment of have to increase pelletizing or briquetting, adds the consumption of manpower and the energy.
Therefore, at present in the urgent need to a kind of novel electric melting magnesium furnace.
Summary of the invention
The utility model is intended to overcome the deficiencies in the prior art, and provide a kind of coreless armature electric melting magnesium furnace, it can make full use of powder, and what realize powder and block material enters stove respectively, there will not be paulin material phenomenon and spray stove phenomenon; Further, can not airborne dust be caused, improve raw material availability, decrease environmental pollution; Meanwhile, do not need pelletizing or briquetting technique, reduce the consumption of manpower and the energy.
For this reason, the utility model provides following technical scheme: a kind of coreless armature electric melting magnesium furnace, it comprises kiln car, described kiln car is laid kiln bucket, described kiln bucket is provided with petticoat pipe, the central area of described petticoat pipe is provided with electrode hole, electrode is inserted in described kiln bucket by described electrode hole, the centre bore running through whole electrode is provided with in described electrode, described centre bore is connected with powder feeder by powder carry flexible pipe, described powder feeder is connected with high-pressure air source with powder temporary storing bin respectively, described petticoat pipe is also provided with block material to feed intake passage, feed intake passage and screening machine one exports and is connected for described block of material, another outlet of described screening machine is connected with described powder temporary storing bin by powder carry passage.
Further, wherein, described kiln car is equipped with refractory material, described kiln bucket is placed on described refractory material.
Further, wherein, described powder feeder is connected with described powder temporary storing bin by powder carry pipeline, is connected with described high-pressure air source by high-pressure gas pipelines.
Again further, wherein, described electrode is provided with electrode holde.
On the other hand, wherein, described electrode is graphite electrode or carbon electrode, and the current density flowing through described electrode should meet: graphite electrode 8A/cm
2~ 20A/cm
2, carbon electrode 4A/cm
2~ 15A/cm
2.
Further, wherein, described high-pressure air source is carbon dioxide, nitrogen or air, and its air pressure is between 0.1MPa ~ 0.8MPa.
In coreless armature electric melting magnesium furnace of the present utility model, powder is directly delivered in the molten bath under electrode tip arc region by the centre bore of electrode centers under the effect of gases at high pressure, save and make the intermediate link such as pelletizing or briquetting, shorten the flow process of smelting process for production, save the energy needed for these operations; Further, powder is directly delivered in the molten bath under electrode tip arc region, can rapid melting, solve furnace charge air permeability and the conductivity problems of traditional electric melting magnesium furnace, whole smelting process, stop collapse material, splash, also omit and heavy manually smash stove operation, the labour intensity of workman can be reduced.
Accompanying drawing explanation
Fig. 1 is the formation schematic diagram of coreless armature electric melting magnesium furnace of the present utility model.
Detailed description of the invention
Describe detailed description of the invention of the present utility model in detail below in conjunction with accompanying drawing, the content of detailed description of the invention is not as the restriction to protection domain of the present utility model.
The utility model relates to coreless armature electric melting magnesium furnace, and what it can realize powder and block material enters stove respectively, there will not be paulin material phenomenon and spray stove phenomenon; Further, can not airborne dust be caused, improve raw material availability, decrease environmental pollution; Meanwhile, do not need pelletizing or briquetting technique, reduce the consumption of manpower and the energy.
Fig. 1 shows the formation schematic diagram of coreless armature electric melting magnesium furnace of the present utility model.As shown in Figure 1, coreless armature electric melting magnesium furnace of the present utility model comprises kiln car 6.Before each melting starts, described kiln car 6 is positioned on the track under table, so that mobile.Kiln bucket 4 laid by described kiln car 6.In the utility model, preferably, described kiln car 6 is equipped with refractory material 5, described kiln bucket 4 is placed on described refractory material 5.Like this, can prevent described kiln bucket 4 from scorching described kiln car 6 etc.
Described kiln bucket 4 is provided with petticoat pipe 1.The central area of described kiln bucket 4 is provided with several electrodes.In the utility model, preferably, the central area of described kiln bucket 4 is provided with 2 ~ 6 electrodes.Meanwhile, in the utility model, in electrode 2 described at least one, be provided with the centre bore 3 running through whole electrode.Described centre bore 3 is connected with powder feeder 10 by powder carry flexible pipe 9.Described powder feeder 10 is connected with high-pressure air source 14 with powder temporary storing bin 12 respectively.Preferably, described powder feeder 10 is connected with described powder temporary storing bin 12 by powder carry pipeline 11, is connected with described high-pressure air source 14 by high-pressure gas pipelines 13.Powdery furnace charge is stored in described powder temporary storing bin 12.Described high-pressure air source 14 is carbon dioxide, nitrogen or air, and its air pressure is between 0.1MPa ~ 0.8MPa.Like this, in the utility model, the load mode sent in stove by powdery furnace charge is Geldart-D particle.Namely, the powdery furnace charge stored in described powder temporary storing bin 12 and the gases at high pressure of described high-pressure air source 14 all enter in described powder feeder 10, under the effect of the gases at high pressure of described high-pressure air source 14, described powdery furnace charge is entered in described kiln bucket 4 by the centre bore 3 in described high pressure conveying pipeline 9 and described electrode 2.
In addition, in the utility model, described petticoat pipe 1 is also provided with block material and feeds intake passage 8.Preferably, described block of material passage 8 that feeds intake is provided with multiple, and arranges around described electrode hole.Feed intake passage 8 and screening machine 16 one exports and is connected for described block of material.Another outlet of described screening machine 16 is connected with described powder temporary storing bin 12 by powder carry passage 15.Like this, raw material enters described screening machine 16, is sieved into powder and block material by affiliated screening machine 16.Wherein, described powder is transported in described powder temporary storing bin 12 by described powder carry passage 15.Described block of material is delivered directly in described kiln bucket 4 by the described block of material passage 8 that feeds intake.
In the utility model, preferably, described electrode 2 is provided with electrode holde 7, thus is convenient to hold described electrode 2, and then be convenient to mobile described electrode 2.More preferably, described electrode 2 is graphite electrode or carbon electrode, and the current density flowing through described electrode 2 should meet: graphite electrode 8A/cm
2~ 20A/cm
2, carbon electrode 6A/cm
2~ 15A/cm
2.
When adopting coreless armature electric melting magnesium furnace of the present utility model to smelt, raw material, that is, the giobertite after fragmentation or light-magnesite powder, enter screening machine 16, sieves through described screening machine 16, separates powder and block material.Then, described block of material passage 8 that feeds intake is delivered directly in described kiln bucket 4; Powder through pneumatic powder charging gear, under the gases at high pressure effect of high-pressure air source, delivers to the arc region rapid melting of electrode lower end through sealing transfer canal by seal tube and centre hole of electrode.Because powder and block material are separately sent, so raw material bed permeability in stove can not be caused bad, there will not be paulin material phenomenon or liquation splash.And the arc region rapid melting that powder is directly held under the electrodes, airborne dust can not be caused being added in the process in stove, improve the utilization rate of raw material.Meanwhile, do not need the technology and equipment increasing pelletizing or briquetting, reduce the consumption of manpower and the energy.
The content of detailed description of the invention is understood for the ease of those skilled in the art and uses the utility model and describe, and does not form the restriction to the utility model protection content.Those skilled in the art, after having read content of the present utility model, can carry out suitable amendment to the utility model.Protection content of the present utility model is as the criterion with the content of claim.When not departing from flesh and blood and the protection domain of claim, the various amendments carried out the utility model, change and replacement etc. are all within protection domain of the present utility model.
Claims (6)
1. a coreless armature electric melting magnesium furnace, it comprises kiln car (6), described kiln car (6) is laid kiln bucket (4), described kiln bucket (4) top is provided with petticoat pipe (1), the central area of described kiln bucket (4) is provided with 2 ~ 6 electrodes (2), the centre bore (3) having at least an electrode to be provided with in described electrode (2) to run through whole electrode, described centre bore (3) is connected with powder feeder (10) by powder delivering pipe (9), described powder feeder (10) is connected with high-pressure air source (14) with powder temporary storing bin (12) respectively, described kiln bucket (4) top is also provided with block material and feeds intake passage (8), feed intake passage (8) and screening machine (16) one exports and is connected for described block of material, another outlet of described screening machine (16) is connected with described powder temporary storing bin (12) by powder carry passage (15).
2. coreless armature electric melting magnesium furnace according to claim 1, wherein, described kiln car (6) is equipped with refractory material (5), and described kiln bucket (4) is placed on described refractory material (5).
3. coreless armature electric melting magnesium furnace according to claim 2, wherein, described powder feeder (10) is connected with described powder temporary storing bin (12) by powder carry pipeline (11), is connected with described high-pressure air source (14) by high-pressure gas pipelines (13).
4. coreless armature electric melting magnesium furnace according to claim 3, wherein, described electrode (2) is provided with electrode holde (7).
5. coreless armature electric melting magnesium furnace according to claim 1, wherein, described electrode (2) is graphite electrode or carbon electrode, and the current density flowing through described electrode (2) should meet: graphite electrode 8A/cm
2~ 20A/cm
2, carbon electrode 4A/cm
2~ 15A/cm
2.
6. coreless armature electric melting magnesium furnace according to claim 5, wherein, described high-pressure air source (14) is carbon dioxide, nitrogen or air, and its air pressure is between 0.1MPa ~ 0.8MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520112585.6U CN204594254U (en) | 2015-02-11 | 2015-02-11 | A kind of coreless armature electric melting magnesium furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520112585.6U CN204594254U (en) | 2015-02-11 | 2015-02-11 | A kind of coreless armature electric melting magnesium furnace |
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| CN204594254U true CN204594254U (en) | 2015-08-26 |
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| CN201520112585.6U Expired - Fee Related CN204594254U (en) | 2015-02-11 | 2015-02-11 | A kind of coreless armature electric melting magnesium furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115820964A (en) * | 2022-12-08 | 2023-03-21 | 徐州宏阳新材料科技股份有限公司 | Device and method for preparing high-carbon ferrochrome through whole-powder ore smelting |
-
2015
- 2015-02-11 CN CN201520112585.6U patent/CN204594254U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115820964A (en) * | 2022-12-08 | 2023-03-21 | 徐州宏阳新材料科技股份有限公司 | Device and method for preparing high-carbon ferrochrome through whole-powder ore smelting |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20190211 |