CN205999019U - graphitizing furnace - Google Patents

Abstract

The utility model discloses a kind of graphitizing furnace.The graphitizing furnace includes the induction coil on the outside of body of heater for sensing heating material, and the graphitizing furnace is nothing metal furnace shell graphitizing furnace, is arranged on the outermost induction coil of graphitizing furnace as furnace shell.Graphitizing furnace of the present utility model can cause body of heater volume unrestricted nothing furnace shell nothing heat-insulation layer, and after once putting into, maintenance cost is extremely low, and the high-volume for being especially suitable for material heat treatment is continuously produced.

Description

Graphitizing furnace

Technical field

The utility model is related to a kind of graphitizing furnace, belongs to graphitizing furnace field.

Background technology

With the development of new forms of energy power, lithium ion battery increasingly investee favor, carbon negative pole material as lithium from Its market of the key components of sub- battery also faces eruptive growth.A committed step in carbon negative pole material production process Exactly improve degree of graphitization and improve purity.Graphitization refers to that carbon atom is changed into regular row by mixed and disorderly irregular alignment under high temperature Six side's plane mesh structures, the i.e. graphite microcrystalline structure of row, its objective is to obtain graphite high connductivity, high heat conduction, corrosion-resistant, antifriction The performance of wiping etc..Graphitization temperature may be up to 3100 DEG C, and temperature is higher, and graphite microcrystalline structure development is more perfect, so as to graphitization Degree is improved；While at such high temperatures, the atom of other low melting points is all discharged in gaseous form, so as to realize carrying for material Pure.We are referred to as graphitizing furnace to complete equipment that the high or purity of degree of graphitization improves, need the material of graphitization processing also to include CNT, nuclear graphite, native graphite and Delanium etc..

Acheson furnace is the graphitizing furnace for realizing the production of high-volume high temperature graphitization, is characterized in that batch is big, but due to Which is Open architecture, and tail gas nothing is focused on, and the use of substantial amounts of filler coke is resistance heating, so as to cause high energy consumption, dirty Dye environment, non-uniform temperature.Though the interior string electric pole type graphitizing furnace having through technological improvement, high energy consumption, pollution are big, temperature is not Uniform problem is not resolved.Chinese patent CN201010108189.8 discloses a kind of vertical high temperature continuous graphitizing furnace, With upper/lower electrode to connecting dc source, with material as resistance heating, which has the disadvantage high energy consumption, and the efficiency of heating surface is low.Occur again afterwards Medium frequency induction graphitizing furnace, a kind of vertical continuous sensing high temperature graphitization as disclosed in Chinese patent CN201410666556.4 A kind of Super-high temperature graphitization treatment equipment, Chinese patent disclosed in stove, Chinese patent CN201410016297.0 Disclosed in CN201210487294.6, a kind of continuous high-temperature graphite purification equipment, Chinese patent CN200910042891.6 are disclosed Graphite purification and graphitizable high temperature vertical continuous induction heating furnace, continuous vertical disclosed in Chinese patent CN200920009018.2 Formula intermediate frequency high temperature high purity graphite production equipment etc., is characterized in that the efficiency of heating surface is high, and energy consumption is low, but the thermal conductivity factor of powder is relatively Low, the temperature homogeneity so as to cause material in stove is poor, and the spread in performance of product is uneven, and these graphitizing furnaces all have stove Shell structure, in addition to needing furnace shell cooling water cooling, also limit the volume size of heating furnace, while maintenance cost is too high, real In border and be not implemented material production in enormous quantities.

Utility model content

The utility model aims to provide a kind of graphitizing furnace, and the graphitizing furnace can cause body of heater nothing furnace shell nothing heat-insulation layer Volume is unrestricted, and after once putting into, maintenance cost is extremely low, and the high-volume for being especially suitable for material heat treatment is continuously produced.

To achieve these goals, the technical scheme adopted by the utility model is：

A kind of graphitizing furnace, which is structurally characterized in that, including the induction coil on the outside of body of heater for sensing heating material, The graphitizing furnace is nothing metal furnace shell graphitizing furnace, is arranged on the outermost induction coil of graphitizing furnace as furnace shell.

Thus, the utility model doubles as outer layer furnace shell with induction coil, no longer arranges traditional metal furnace shell, makes body of heater big Little no longer limited by metal furnace shell, you can to deduct the volume of metal furnace shell, furnace shell diameter is usually the 1.2- of heating coil 1.8 times, reducing floor space, manufacturing cost and the cooling cost of metal furnace shell being saved again, while not using traditional The insulation materials such as carbon felt, graphite felt, corundum, directly using the poor feature of powder material thermal conductivity, shape on the inside of the induction coil Become heat-insulation layer, idioelectric characteristic can be passed through using electromagnetic induction magnetic field, powder material be directly heated, is drastically increased The efficiency of heating surface of graphitizing furnace.

According to embodiment of the present utility model, the utility model can also be made further optimize, below for optimization after The technical scheme of formation：

The induction coil top is rotation dish, rotates disc rim portions by support body supports, also solid in the rotation dish Surely there is rotary shaft, rotary shaft is connected to drive with external driver device and rotates disc spins.Thus, simultaneously work as stirring when shaft rotates The effect of mixing, makes material heating process evenly.Preferably, the rotation plate edge is supported by induction coil；In the rotation dish Shaft is provided with, the shaft through rotation dish and is fixed in rotation dish.Thus, material is stirred with shaft, carries The temperature homogeneity of material in high stove.

It is preferred that the shaft is provided with the adjustment structure for adjusting that shaft stretches into furnace interior length.Shaft can be adjusted Section stretches into length in body of heater, can be by adjusting the length stretched in body of heater after shaft bottom is due to oxidative wear equal loss New supplement is realized, when shaft causes loss due to oxidation and abrasion, its length in stove can be directly adjusted, is kept away Exempt to tear the trouble of stove replacing open, while the loss that heat-insulation layer and interior crucible are brought is saved, production cost is substantially reduced, facilitate material High-volume large-scale production.

It is preferred that the shaft is made up of graphite material.

The body of heater includes the charging aperture positioned at rotation dish top, as bottom rise support and insulation effect substrate and The cooling zone of discharging opening and its underpart in the middle of substrate.

Foreign gas is quickly overflowed for convenience, the through hole being provided with inside the shaft along axis, used as miscellaneous in body of heater The exhaust passage of matter and thermometric passage, the preferably perforate on shaft with equally distributed ecto-entad obliquely.Thus, side Just foreign gas is entered in the exhaust passage of shaft by oblique perforate.

Further, multiple shafts are fixed with the rotation dish；Multiple shafts uniformly divide along rotation dish center line Cloth；The shaft edge to induction coil distance be 50-500mm.Thus, the sensed coil heats of shaft form two grades Heating element heater, can improve heating region area, while improving in-furnace temperature further, improve the efficiency of heating surface；Additionally, shaft Can be with the further heated material of heating power.

The induction coil is encapsulation induction coil.

The body of heater includes rotation dish, positioned at the charging aperture on rotation dish top, rises as bottom and supports and insulation effect Substrate, and the discharging opening in the middle of substrate and the cooling zone positioned at base lower portion.

Heated more uniform in order to ensure material, the rotating speed of the rotation dish is not higher than 6r/min, preferably 0- 3r/min.

Preferably, a diameter of 0.5 ~ 5m of the induction coil.More preferably 0.5 ~ 3m.

Preferably, it is heated material to be directly loaded in the container being made up of induction coil and substrate, in induction coil The partial material of wall doubles as heat-insulation layer.

Preferably, the power frequency of the induction coil be 300-3000HZ, heating power be 300-3000kW.

By said structure, the utility model is using the poor feature of the heat conductivility of powder material, straight by powder material Connect and use as insulation material, while high using the induction heating technique efficiency of heating surface, the fast feature of programming rate, sensing heating are produced Raw alternating magnetic field can pass through non-conductor, and both are cleverly combined together by the utility model, in abandoning tradition scheme Graphite crucible and heat-insulation layer and furnace shell, greatly reduce the cost of stove, so that the size of stove is no longer restricted, by high-temperature region Expand traditional scheme to 4-5 times, convenient production in enormous quantities.

Compared with prior art, the beneficial effects of the utility model are：

1., using the method for sensing heating, the efficiency of heating surface is high, and energy consumption is low, nothing low-voltage, high-current, it is not necessary to lower pressure rectifier, subtracts The copper loss of few transformer and the consumption of iron loss, low production cost, its electrical heating efficiency improve 50%.

2. nothing metal furnace shell, do not limited by furnace shell size, body of heater size is not limited, thermal treatment zone diameter can reach 2- 10m, is 2-6 times of traditional induction furnace, and single heat processes yield and raises, and is more suitable for volume production.

3. nothing furnace shell, no-cooling-water, it is to avoid the danger that leak is caused, while save the energy consumption of cooling water system.

4. the carbon felt heat-insulation layer of abandoning tradition, little using negative material granularity, bulk specific weight is little, heat transfer efficiency is low spy Point, directly using powder as insulation material, that is, avoids outside transfer of heat from being lost, improves the overall thermal efficiency, reduce thermal insulating material again The maintenance cost that material is caused.

5. shaft can be inductively heated, and as thermal source while heating to powder material, high-temperature region be expanded to originally 4-5 times, make powder material more uniform.

6. when in stove, shaft causes loss due to oxidation and abrasion, in that context it may be convenient to adjust the shaft stretched in stove Length, directly saves the maintenance cost for tearing that stove is caused open.

Description of the drawings

Fig. 1 is the structure principle chart of the utility model one embodiment；

Fig. 2 is the vertical section schematic diagram of the electrode.

Specific embodiment

Below with reference to accompanying drawing and in conjunction with the embodiments describing the utility model in detail.It should be noted that not conflicting In the case of, the embodiment in the utility model and the feature in embodiment can be mutually combined.For sake of convenience, hereinafter such as Occur " on ", D score, "left", "right" printed words, only represent consistent with the upper and lower, left and right direction of accompanying drawing itself, not to structure Play restriction effect.

A kind of graphitizing furnace, as shown in figure 1, including being the induction coil 5 for sensing heating material on the outside of stove, sensing 5 top of coil is rotation dish 2, and 2 marginal portion of rotation dish is supported by induction coil 5, and rotation dish 2 is provided with shaft 4, shaft 4 run through and are fixed in rotation dish 2, and shaft 4 can be adjusted and stretch into length in body of heater, when 4 bottom of shaft is due to oxidation mill Can realize stretching into the new supplement of length in body of heater by adjusting after damaging equal loss, in rotation dish 2, be further fixed on rotary shaft 3, rotary shaft 3 is connected with external driver device and drives rotation dish 3 to rotate, and is also included the charging aperture 1 positioned at 2 top of rotation dish, is made Rise for bottom and support and the substrate 6 of insulation effect and the cooling zone 8 of the discharging opening 7 in the middle of substrate 6 and its underpart

During work, the alternating magnetic field material that induction coil 5 is produced is directly heated, strong by the electric current for adjusting induction coil 5 Degree adjusting material heat penetration, the partial material near 5 inwall of induction coil as insulation material, this direct spent material As heat-insulation layer, no the version of extra heat-insulation layer, that is, the loss of heat is reduced, avoid again being caused by heat-insulation layer loss Maintenance cost.Additionally, shaft 4 can also be inductively heated.Shaft 4 is stirred continuously material when rotating, by contactant Material is heated to material so as to which temperature is more uniform, also makes foreign gas be more prone to overflow along internal exhaust passages, when in stove Shaft 4 due to oxidation and abrasion cause loss when, in that context it may be convenient to adjust its length in stove, it is to avoid tear open stove maintenance fiber crops Tired.

The shaft is made up of graphite material, has exhaust passage inside shaft.The stirring number of axle is no less than 2, Rotate disc spin speed and be not higher than 6r/min, preferably 0-3r/min.

The substrate is by the one kind or many in zirconium oxide, aluminum oxide, silica, magnesia, graphite or other refractory materials Composition is planted, the ratio between each group is divided is not limited, arbitrary proportion mixes.

As shown in Fig. 2 being uniformly provided with multiple oblique perforates 9 on shaft 4, foreign gas is facilitated to enter by oblique perforate 9 Enter in exhaust passage 10 and overflow.

The content that above-described embodiment is illustrated should be understood to that these embodiments are only used for being illustrated more clearly that the utility model, Rather than scope of the present utility model is limited, after the utility model has been read, those skilled in the art are new to this practicality The modification of the various equivalent form of values of type each falls within the application claims limited range.

Claims (9)

1. a kind of graphitizing furnace, it is characterised in that include the induction coil for sensing heating material on the outside of body of heater（5）, The graphitizing furnace is nothing metal furnace shell graphitizing furnace, is arranged on the outermost induction coil of graphitizing furnace（5）As furnace shell；Institute State induction coil（5）Top is rotation dish（2）, rotation dish（2）Marginal portion is by support body supports；The rotation dish（2）Above also It is fixed with rotary shaft（3）, rotary shaft（3）It is connected drive rotation dish with external driver device（2）Rotation.

2. graphitizing furnace according to claim 1, it is characterised in that the rotation dish（2）Edge is by induction coil（5）? Support；The rotation dish（2）It is provided with shaft（4）, the shaft（4）Through rotation dish（2）And it is fixed on rotation dish（2）On.

3. graphitizing furnace according to claim 2, it is characterised in that the shaft（4）Inside is provided with along the logical of axis Hole, the exhaust passage as impurity in body of heater and thermometric passage, shaft（4）Upper have equally distributed ecto-entad obliquely Perforate（9）.

4. graphitizing furnace according to claim 2, it is characterised in that the shaft（4）It is provided with regulation shaft（4） Stretch into the adjustment structure of furnace interior length.

5. graphitizing furnace according to claim 1, it is characterised in that the rotation dish（2）On be fixed with multiple shafts （4）；Multiple shafts（4）Along rotation dish（2）Center line is uniformly distributed；The shaft（4）Edge is to induction coil（5）Away from From for 50-500mm.

6. graphitizing furnace according to claim 1, it is characterised in that the induction coil（5）For encapsulating induction coil.

7. the graphitizing furnace according to one of claim 1-6, it is characterised in that the body of heater includes rotation dish（2）, it is located at Rotation dish（2）The charging aperture on top（1）, the substrate supported with insulation effect is acted as bottom（6）, and it is located at substrate（6）In Between discharging opening（7）Be located at substrate（6）The cooling zone of bottom（8）.

8. graphitizing furnace according to claim 7, it is characterised in that be heated material directly loaded on by induction coil（5） With substrate（6）In the container of composition, positioned at induction coil（5）The partial material of inwall doubles as heat-insulation layer.

9. the graphitizing furnace according to one of claim 1-6, it is characterised in that the induction coil（5）A diameter of 0.5m-5m.