CN101224953A

CN101224953A - Clean energy-saving magnesia electric melting furnace

Info

Publication number: CN101224953A
Application number: CNA2008100571360A
Authority: CN
Inventors: 崔承波; 崔峥
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-30
Filing date: 2008-01-30
Publication date: 2008-07-23

Abstract

The invention relates to smelting equipment, in particular to a clean and energy-saving magnesia electrical furnace. A main body of the electrical furnace is a cylinder-shaped furnace body with upper and lower openings, and is characterized in that the cylinder-shaped furnace body 1 is formed by the up-and-down butting of more than one or two cylinder-shaped single bodies 2. Each single body 2 is formed by the butting of two left and right curved walls 7 or more than two curved walls 7. The outside of each curved wall 7 is provided with connecting boards 9 which are mutually butted with the adjacent curved walls, and the inside of the curved wall 7 is provided with heat-resistant and insulation layers. Since the heat-resistant and insulation layers are added, the invention reduces the diffusion of thermal energy, decreases energy consumption, has balanced temperature inside the furnace, complete melting ore and uniform quality and improves grade of the product. By adopting the furnace body structure with opposite left and right sides, the invention can be flatly opened to two sides, thus solving the problem that the ore after melting tightly is combined with a furnace wall and can not be separated. As the single bodies are butted up and down, the height of the invention can be changed and an ablation and shortened electrode bar is used. In addition, surrounding temperature and exhaust of the furnace body are greatly reduced, thus improving working conditions of operators.

Description

Clean energy-saving magnesia electric melting furnace

Technical field

The present invention relates to a kind of smelting equipment, promptly a kind of clean energy-saving magnesia electric melting furnace.

Background technology

Magnesia is important industrial raw material, can be used for the manufacturing of high temperature material, has many uses.At present, the most frequently used magnesia smelting technology is the electric smelting method.Promptly the high arc temperature that produces by electrode bar in electric smelter is magnesium ore or the fusing of magnesium powder, and is frozen into stone roller, again through crushing and screening, dispels impurity and the magnesia that obtains.The magnesia electric melting furnace in past is as body of heater with an iron sheet cylinder, this body of heater is placed on the wooden handcart that transports the magnesia stone roller, load ore to the inside again, when the ore of bottom reaches certain thickness, electrode is inserted on the ore layer, fills up ore again, carry electrode bar on the generation electric arc of switching on then is also rapid, up along with electrode bar, the ore fusion is also solidified.Remove electrode bar and stove tube, can obtain the magnesia stone roller.In this process, necessary control electrode rod and peripheral distance make near the unfused ore layer of reservation one deck furnace bottom and the furnace wall.Could guarantee that like this body of heater and wooden handcart are not burnt out, and can realize the disengaging of stove tube.Though this mode has the simple advantage of equipment, but its shortcoming also is relatively more outstanding.Its main drawback has 7 points: the one, and wayward, burn runout body and sweep easily.The 2nd, the waste ore, some are difficult to reclaim attached to the ore on magnesium stone roller surface.The 3rd, the furnace insulation poor performance, a large amount of heats distribute rapidly, cause waste of electric energy.The 4th, because heat-retaining condition is bad, the temperature around stove is interior is lower than core temperature, and magnesia quality and purposes that differing temps is fired all have very big gap, cause product grade to reduce.The 5th, the body of heater altitude hold, electrode bar can not be used after ablating and shortening again, and waste is serious.The 6th, body of heater broke away from suddenly when hot melt finished, and not burned outer ore is scattered rapidly, distributes a large amount of smog, contaminate environment.The 7th, the stove surrounding temperature is too high, and smoke pollution is serious, and operating condition is abominable, infringement operator's health.Therefore, existing magnesia electric melting furnace is badly in need of improving.

Summary of the invention

The purpose of this invention is to provide a kind of body of heater and be difficult for fusing, good heat insulating, temperature is relatively more balanced in the stove, and ore melts fully, and smoke-less pollution can not damage the healthy clean energy-saving magnesia electric melting furnace of operator.

Above-mentioned purpose is realized by following technical scheme: develop a kind of clean energy-saving magnesia electric melting furnace, the main body of this electric smelter is the tubular body of heater of upper and lower opening.Be characterized in: said tubular body of heater is to be docked up and down by one or more tubular monomer to form.Each monomer is to be formed by two or more than two curved wall butt joint of the left and right sides.Be equipped with the connecting plate that connects with adjacent curved wall in the outside of every curved wall, the curved wall the inside is provided with heat-resisting thermal insulation layer.

The heat-resisting thermal insulation layer of said curved wall the inside is to be made of refractory layer and thermal insulation layer.

Said refractory layer is to be formed by magnesia powder and tamanori aluminium dihydrogen phosphate mixed sintering.

Said thermal insulation layer is by perlite, continuous, the tamanori synthetic silicate thermal insulation layer of insulation.

Said monomeric horizontal section is circular or oval ring-type.

Said horizontal section is that circular monomer is to be formed by two curved wall butt joints, and curved wall is refractory layer, thermal insulation layer, iron sheet from inside to outside successively, and the outside of every curved wall has a semi-circular ring flange up and down, and two of ring flange is provided with the connecting plate of evagination.

Said connecting plate is two blocks of relative up and down steel plates, respectively has lower through-hole, is connected by latch.

Said connecting plate is a steel plate relative about two, all has horizontal through hole above, is connected by bolt.

The nethermost monomer of said body of heater the inside is furnished with the base that is made of thermal insulation layer and refractory layer, and the diameter of base is less than monomeric internal diameter or greater than monomeric external diameter.

Adopt the clean energy-saving magnesia electric melting furnace of technique scheme,, reduced the diffusion of heat energy, reduced energy consumption owing to increased heat-resisting thermal insulation layer, temperature equalisation in the stove, the ore fusing fully, uniform quality has improved the grade of product.Relative furnace binding about employing can be to two side flat opens, solve the problem of combining closely and can not break away from ore fusion back and furnace wall.The mode that adopts a plurality of monomers to dock up and down, the adjustable height of body of heater can make full use of the electrode bar of ablating and shortening, and reduces the consuming cost of electrode bar.In addition, the body of heater surrounding temperature reduces, and the ore fusion is discharged when taking off stove and reduced fully in the stove, has solved high temperature and pollution problems, has improved operator's working conditions.

Description of drawings

Fig. 1 is the front view of first kind of embodiment;

Fig. 2 is the monomeric front views of the parts of first kind of embodiment;

Fig. 3 is the monomeric vertical views of the parts of first kind of embodiment;

Fig. 4 is the front view of the parts curved wall of first kind of embodiment;

Fig. 5 is the vertical view of the parts curved wall of first kind of embodiment;

Fig. 6 is the front view of second kind of embodiment;

Fig. 7 is the vertical view of second kind of embodiment;

Fig. 8 is the working state schematic representation of invention;

Fig. 9 is the working state schematic representation of background technology;

Figure 10 is the working state schematic representation of background technology.

Among the figure as seen: body of heater 1, monomer 2, base 3, wooden handcart 4, ore 5, electrode bar 6, curved wall 7, ring flange 8, connecting plate 9, latch 10, refractory layer 11, thermal insulation layer 12, iron sheet 13, seam 14, bolt 15, molten magnesium stone roller 16, stove tube 17.

Embodiment

First kind of embodiment: as shown in Figure 1, the body of heater 1 of this electric melting magnesium furnace is to be combined up and down by three monomers 2, is placed on the coaster 4, a base 3 is put in the bottom, and the inside is inserted with three electrode bars 6, fills ore 5 then, after electrode bar 6 energisings, produce high-temperature electric arc, make ore 5 fusings in the end.Up along with electrode bar 6, ore 5 fusing successively and be frozen into stone roller rapidly in the stove.

By Fig. 2,3,4,5 as seen, each monomer 2 all is to be formed by 7 butt joints of two semicircular curved walls.Between form a seam 14.Certainly, 14 represented 4 of seams can be the faces of a bending, to improve tightness.Two curved walls 7 a semi-circular ring flange 8 respectively arranged up and down, respectively there is a connecting plate 9 at two ends.On the connecting plate 9 jack is arranged, the jack of connecting plate 9 is relative during two curved wall 7 butt joints, inserts and two curved walls 7 can be fixed together with latch 10.

By Fig. 2,3,5 as seen, constituted by refractory layer 11, thermal insulation layer 12 and iron sheet 13 at each curved wall 7.The refractory layer 11 here is to be made by refractory materials, the basic refractory that refractory materials can adopt magnesium oxide and aluminum phosphate class tamanori to mix forms through high-temperature firing, can anti-1800 ℃ of high temperature, make the flame retardant coating 11 of thick 30-60mm, also can decide as required.Thermal insulation layer 12 can adopt composite silicate thermal insulation material to make, and the silicate lagging material is to be synthesized by perlite, insulation silk floss, tamanori.Tamanori wherein can adopt inorganic silicon type high temp glue.Insulation is continuous to be chosen in silicon silk floss, Qi's silk floss, Russia's silk floss, glass wool.Simultaneously, also can add inorganic raw materials such as sepiolite, expanded pure aluminium silicate.The ratio that above-mentioned raw materials cooperates is more wide in range, and as being unit with the volume, perlite is 30-40%, and various continuous classes account for 30-40%, and the consumption of tamanori can exceed with raw material in moulding, and other raw materials are an amount of, and insulation bed thickness 20-80mm also can decide as required.

As seen from Figure 8, after the hot melt of finishing ore, can take out the latch 10 on the connecting plate 9, two monomers 2 are drawn back to both sides, expose the molten magnesium stone roller 16 that solidifies, transport with coaster 4 and get final product.Owing to adopted high temperature resistant and heat insulation internal layer, need not stay the iron sheet 13 that ore layer also can not burn out body of heater.Adopt the method for left and right sides Ping Kai,, also can break away from smoothly even molten magnesium stone roller 16 and inwall bonded are very tight.

In order to say something, Fig. 9 and Figure 10 have introduced the working condition of background technology especially.As seen; its body of heater is an iron sheet stove tube 17 just; be not incubated heat-stable base above the car yet; burn out easily; so must be away from electrode bar, on every side and below stay the next not ore layer of scorification, both can protect body of heater and sweep; be convenient to the lifting of stove tube 17 again, can make progress stove tube 17 lifting and break away from molten magnesium stone roller 16 as shown in figure 10.Obviously, this method internal-external temperature difference is very big, and grade differs.Having at molten magnesium skin does not much have burned half-cooked material, and can produce smog and high temperature, very big to operator's physical impairment.The present invention has solved the problems referred to above just.

Second kind of embodiment: shown in Fig. 6,7, the body of heater 1 of this electric melting magnesium furnace also is to be made of a plurality of monomers 2, and each monomer 2 also is to be formed by 7 butt joints of two curved walls.Different with precedent is: fishplate bar 9 is erect, and during two curved wall 7 butt joints, two connecting plates about 9 are relative, is penetrated to tighten by bolt 15 to get final product.This mode, lower to the accuracy requirement of connecting plate 9, also comparing of connection is tight.

Claims

1. clean energy-saving magnesia electric melting furnace, the main body of this electric smelter is the tubular body of heater of upper and lower opening, it is characterized in that: said tubular body of heater (1) is to be docked up and down by one or more tubular monomer (2) to form, each monomer (2) is to be formed by two or more than two curved wall (7) butt joint of the left and right sides, be equipped with the connecting plate (9) that connects with adjacent curved wall (7) in the outside of every curved wall (7), curved wall (7) the inside is provided with heat-resisting thermal insulation layer.

2. clean energy-saving magnesia electric melting furnace according to claim 1 is characterized in that: the heat-resisting thermal insulation layer of said curved wall (7) the inside is to be made of refractory layer (11) and thermal insulation layer (12).

3. clean energy-saving magnesia electric melting furnace according to claim 2 is characterized in that: said refractory layer (11) is to be formed by magnesia powder and tamanori aluminium dihydrogen phosphate mixed sintering.

4. clean energy-saving magnesia electric melting furnace according to claim 2 is characterized in that: said thermal insulation layer (12) is by perlite, continuous, the tamanori synthetic silicate thermal insulation layer of insulation.

5. clean energy-saving magnesia electric melting furnace according to claim 1 is characterized in that: the horizontal section of said monomer (2) is circular or oval ring-type.

6. clean energy-saving magnesia electric melting furnace according to claim 5, it is characterized in that: said horizontal section is that circular monomer (2) is to be formed by two curved walls (7) butt joint, curved wall (7) has refractory layer (11), thermal insulation layer (12), iron sheet (13) from inside to outside successively, the outside of every curved wall (7) has a semi-circular ring flange (8) up and down, and two of ring flange (8) is provided with the connecting plate (9) of evagination.

7. clean energy-saving magnesia electric melting furnace according to claim 6 is characterized in that: said connecting plate (9) is two blocks of relative up and down steel plates, all has through hole up and down on every block plate, is connected by latch (10).

8. want 6 described clean energy-saving magnesia electric melting furnaces according to right, it is characterized in that: said connecting plate (9) is a steel plate relative about two, all has horizontal through hole on every block plate, is connected by bolt (15).

9. clean energy-saving magnesia electric melting furnace according to claim 1, it is characterized in that: the nethermost monomer of said body of heater (1) (2) the inside is furnished with the base (3) that is made of thermal insulation layer and refractory layer, and the diameter of base (3) is less than the internal diameter of monomer (2) or greater than the external diameter of monomer (2).