CN201837224U

CN201837224U - Smelting electric arc furnace provided with air supply feeding device

Info

Publication number: CN201837224U
Application number: CN2010205501085U
Authority: CN
Inventors: 吴绍相
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-09-30
Filing date: 2010-09-30
Publication date: 2011-05-18
Anticipated expiration: 2020-09-30

Abstract

The utility model relates to a smelting electric arc furnace provided with air supply feeding device, which is long in service life and saves energy, and comprises a furnace body, and an electrode rod and an air supply pipe that extend into an inner cavity of the furnace body, wherein the air supply pipe is connected with a blast blower; the side wall of the furnace body is evenly distributed with a plurality of inclined holes, and orifices of the inclined holes on the outer side wall are higher than those on the inner side wall; and the air supply pipe penetrates through the inclined holes and extends into the inner cavity of the furnace body. The smelting electric arc furnace improves the reaction speed and efficiency in the furnace, improves the yield and reduces the electricity consumption and reaction time of unit mineral substance, thus achieving the effects of saving energy and reducing the carbon emission.

Description

The smelting mine heat furnace of band air-supply pay-off

Technical field

The utility model relates to a kind of smelting mine heat furnace that is used to produce product tape air-supply pay-offs such as ferrosilicon, calcium carbide.

Background technology

Present smelting mine heat furnace adopts the mode of the heat that electric arc produced that produces by charged electrode rod energising back to smelt usually, because the material in the body of heater is more, the oxygen deficiency of electrode bar end, furnace temperature is difficult to improve, the reducing power of charcoal element descends, the result causes present stage thermal mineral furnace ubiquity aeration poor, power consumption is big, the plain also unmanageable situation of commercial weight of high-temperature region temperature and charcoal, the patent No. is that 00232320.6 patent is improved at above-mentioned technology, by through hole is set in the middle of electrode bar, in stove, feed gas by through hole and reach the effect that improves temperature and reducing power, but the easy oxidation of electrode bar joint, rupture easily, the zone of blowing is simultaneously limited to, and improves the DeGrain of furnace temperature and the plain reducing power of charcoal by carrying air.

Summary of the invention

The utility model purpose is to provide the smelting mine heat furnace of the band air-supply pay-off of a kind of long service life, energy savings.

The purpose of this utility model is achieved in that electrode bar and the ajutage that it comprises body of heater and stretches into the body of heater inner chamber, ajutage is connected with air blast, described sidewall of the furnace body is evenly equipped with several inclined holes, lateral wall inclined hole aperture is higher than the oblique emptying aperture mouth of internal face, and ajutage passes inclined hole and stretches into the body of heater inner chamber.

The utlity model has following advantage: improved reaction speed and efficient, improved output, reduced unit mineral matter power consumption and reaction time, played energy-conservation, as to reduce carbon emission amount effect.

Description of drawings

Fig. 1 is the structural representation of the utility model band portion section

Label declaration

1, the plain feed pipe of body of heater, 2 electrode bars, 3 ajutages, 4 inclined holes, 5 charcoals, 6 air blasts,

41 blast mains, 42 blowpipes, 43 valves, 44 threeways.

The specific embodiment

As shown in Figure 1, electrode bar 2 and ajutage 3 that the utility model comprises body of heater 1 and stretches into the body of heater inner chamber, by electrode bar the mineral matter in the body of heater is heated, its operation principle is for after switching on, end at electrode bar forms electric current, form electric arc between two adjacent electrode bars, thereby generation heat, ajutage is connected with air blast, the main purpose of ajutage is to carry air or oxygen in body of heater, owing to mineral matter mainly exists with the form of oxide, so by be mixed with charcoal element (simple substance carbon) in mineral matter oxide is reduced, after adding oxygen, can improve the temperature in the body of heater, its course of reaction is accelerated, charcoal is plain simultaneously also can form carbon monoxide with oxygen reaction, equally also be stronger reducing agent, the reduction efficiency of mineral matter is improved.Wherein sidewall of the furnace body is evenly equipped with several inclined holes 4, and the quantity of inclined hole is decided according to the size of body of heater, and lateral wall inclined hole aperture is higher than the oblique emptying aperture mouth of internal face, and ajutage passes inclined hole and stretches into the body of heater inner chamber.Can guarantee that like this ajutage need not too stretch into the body of heater inner chamber, can avoid ajutage in the air-supply process, owing to too stretch into the body of heater inner chamber, be subjected to the extruding of mineral matter and the danger of rupturing, the continuity of the feeding of guaranteeing.

Described ajutage is divided into blast main 41 and blowpipe 42, and blowpipe is the hollow plumbago pipe, and blowpipe passes inclined hole and stretches into the body of heater inner chamber, and the blast main is provided with valve 43, and the blast main is connected by threeway 44 with blowpipe.Generally speaking, ajutage stretches into the part of body of heater inner chamber should be high temperature resistant, corrosion, supply gas so can adopt with electrode bar identical materials (graphite), and ajutage do not extend into the part in the body of heater, can adopt the pipeline of common material to get final product, to its no specific (special) requirements.The blast main is provided with valve, can whether control air intake.The blast main is connected by threeway with blowpipe, and threeway can be used for considering whether border on pipeline, then connects other pipelines if desired separately, does not need then to seal.

Threeway also is connected with the plain feed pipe 5 of charcoal, generally speaking, the pulverous form of the many employings of reducing agent (charcoal element), if disposable adding is too much, can influence extent of reaction because existing body of heater is for fear of above-mentioned situation, generally the amount put into of charcoal element is all few, so also usually cause a large amount of mineral matters to be finished, and the utility model is brought the defective that part charcoal element has overcome prior art into by ventilation duct for reaction.

The quantity of described electrode bar is 3, the formation equilateral triangle that is equally spaced between the electrode bar in twos, and the center of circle of equilateral triangle inscribed circle overlaps with the center of body of heater.Can guarantee that like this electrode bar is more even to whole body of heater inner chamber heating.

The oblique emptying aperture mouth of internal face is 20 ~ 50cm apart from the distance of body of heater inner chamber bottom surface, present body of heater, and the fiercest place of general reaction is the position of 20 ~ 50cm in the distance of distance body of heater inner chamber bottom surface just.

The degree of depth that blowpipe stretches into the body of heater inner chamber is 20 ~ 40 centimetres.Can guarantee like this to blow and feeding can in body of heater, disperse more even.

Described inclined hole is that lateral wall inclined hole aperture is big, the little pyramidal structure in madial wall inclined hole aperture.The structure of blowpipe is that the air inlet bore is big, the pyramidal structure that the air outlet bore is little.Inclined hole and blowpipe adopt inner small and outside big structure, can guarantee that the blowpipe replacing is convenient, and blowpipe can tightly be stuck on the inclined hole difficult drop-off simultaneously.

Inclined hole of the present utility model promptly can be distributed on the same horizontal plane, also can distribute according to the horizontal plane alternatively up and down.

The utility model can be used for smelting commercial silicon, ferrosilicon, calcium carbide, ferroalloy etc.

Claims

One kind with the air-supply pay-off smelting mine heat furnace, electrode bar and ajutage that it comprises body of heater and stretches into the body of heater inner chamber, ajutage is connected with air blast, it is characterized in that: described sidewall of the furnace body is evenly equipped with several inclined holes, lateral wall inclined hole aperture is higher than the oblique emptying aperture mouth of internal face, and ajutage passes inclined hole and stretches into the body of heater inner chamber.
2. the smelting mine heat furnace of band air-supply pay-off according to claim 1, it is characterized in that: described ajutage is divided into blast main and blowpipe, blowpipe is the hollow plumbago pipe, blowpipe passes inclined hole and stretches into the body of heater inner chamber, the blast main is provided with valve, and the blast main is connected by threeway with blowpipe.
3. the smelting mine heat furnace of band air-supply pay-off according to claim 2 is characterized in that: threeway also is connected with the plain feed pipe of charcoal.
4. the smelting mine heat furnace of band air-supply pay-off according to claim 1, it is characterized in that: the quantity of described electrode bar is 3, the formation equilateral triangle that is equally spaced between the electrode bar in twos, the center of circle of equilateral triangle inscribed circle overlaps with the center of body of heater.
5. the smelting mine heat furnace of band air-supply pay-off according to claim 1, it is characterized in that: the oblique emptying aperture mouth of internal face is 20 ~ 50cm apart from the distance of body of heater inner chamber bottom surface.
6. the smelting mine heat furnace of band air-supply pay-off according to claim 1, it is characterized in that: the degree of depth that blowpipe stretches into the body of heater inner chamber is 20 ~ 40 centimetres.
7. the smelting mine heat furnace of band air-supply pay-off according to claim 1 is characterized in that: described inclined hole is that lateral wall inclined hole aperture is big, the little pyramidal structure in madial wall inclined hole aperture.
8. the smelting mine heat furnace of band air-supply pay-off according to claim 1, it is characterized in that: the structure of blowpipe is that the air inlet bore is big, the pyramidal structure that the air outlet bore is little, and the outer wall of blowpipe matches with the inclined hole inwall.