CN205907040U - Powder heat treatment furnace - Google Patents

Abstract

The utility model discloses a powder heat treatment furnace. Powder heat treatment furnace sets up the crucible in sealing furnace including the stove outer covering that has closed furnace to and the heat preservation lid of setting on the stove outer covering top, the lid that keeps warm is opened there is the feed inlet, and open this stove outer covering bottom has the discharge gate, the crucible outer wall is equipped with induction coil, upper portion is equipped with the rolling disc in the crucible to and pass keep warm lid and the fixed axis of rotation that links to each other of rolling disc. The utility model discloses a serialization production of powder material, and it is energy -conserving effectual, heating efficiency is high.

Description

Powder body heat-treatment furnace

Technical field

This utility model is related to a kind of powder body heat-treatment furnace, belongs to material graphitization apparatus 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.One of carbon negative pole material production process committed step It is exactly graphitization purification.Graphitization refers to that under high temperature, carbon atom is changed into six regularly arranged side's planes by mixed and disorderly irregular alignment Network structure, i.e. graphite microcrystalline structure, its objective is to obtain the performance of graphite high connductivity, high heat conduction, corrosion-resistant, rub resistance etc.. Graphitization temperature may be up to 3100 DEG C, and temperature is higher, and graphite microcrystalline structure develops more perfect, degree of graphitization raising；Simultaneously such as At a temperature of this height, the atom of other low melting points is all discharged in gaseous form, thus realizing the purification of material.It is used for improving graphite The equipment of change degree or purity we be referred to as graphitizing furnace, need the material of graphitization processing also to include CNT, nuclear graphite, sky So graphite and Delanium etc..

Acheson furnace is the stove that the first realizes the production of high-volume high temperature graphitization, is characterized in that batch is big, but by It is Open architecture in it, tail gas no focuses on, and the use of substantial amounts of filler coke is resistance heating, thus causing high energy consumption, Pollution environment, non-uniform temperature.Though there being the interior string electrode carbonization stove through technological improvement, high energy consumption, pollution is big, and temperature is not Uniform problem is not resolved.Patent cn201010108189.8 discloses a kind of vertical high temperature continuous graphitizing furnace, above To connecting DC source, with material as resistance heating, its shortcoming is high energy consumption to bottom electrode, and the efficiency of heating surface is low.Intermediate frequency occurs afterwards again Sensing graphitizing furnace, such as Chinese Patent Application No. cn201410666556.4 disclose a kind of vertical continuous sensing high temperature graphitization Stove, Chinese Patent Application No. cn201410016297.0 disclose a kind of Super-high temperature graphitization treatment equipment, Chinese patent application Number cn201210487294.6 discloses a kind of continuous high-temperature graphite purification equipment, Chinese Patent Application No. Cn200910042891.6 discloses a kind of graphite purification and graphitizable high temperature vertical continuous induction heating furnace, Chinese patent application Number cn200920009018.2 discloses a kind of continuous vertical type medium-frequency high temperature high purity graphite production equipment, is characterized in the efficiency of heating surface Height, energy consumption is low, but the heat conductivity of powder body is relatively low, thus cause material in stove temperature homogeneity poor, the performance of product Uneven.

Traditional acheson furnace energy consumption is big, and pollution is big, and heating-up temperature is uneven；Existing vertical continuous graphitizing furnace has electricity Pole DC heating stove and induction heater, it mostly realizes continuous prodution using the top-down flowing of material, but powder body The heat conductivility of material is poor, leads to that burner hearth internal temperature is uneven, and properties of product are very different.

Utility model content

In order to solve to lead to the very different situation of properties of product due to non-uniform temperature, this utility model aims to provide one Plant powder body heat-treatment furnace, this high temperature furnace is capable of the continuous prodution of powder material, and good energy-conserving effect, the efficiency of heating surface is high.

To achieve these goals, this utility model be the technical scheme is that

A kind of powder body heat-treatment furnace, including the furnace shell with closed furnace, is arranged on the crucible in closed furnace, Yi Jishe Put the insulation cover on furnace shell top；Described insulation cover has charging aperture, and this furnace shell bottom has discharging opening；It is structurally characterized in that, Described crucible outer wall is provided with induction coil；Described crucible internal upper part is provided with rotation dish, and fixes through insulation cover with rotation dish Connected rotary shaft.

Thus, by induction coil, powder body is heated, the efficiency of heating surface is high, and energy-conservation, rotation dish is to realization stirring work( Can, so that powder body is heated more uniform, thus improve product quality.

According to embodiment of the present utility model, this utility model can also be made further optimize, below for optimizing after The technical scheme being formed:

Foreign gas is overflowed for convenience, and it is raised that the lower end of described rotation dish is provided with stirring, this rotation dish, rotary shaft and stir Mix and in projection, be equipped with the exhaust passage being interconnected.Meanwhile, exhaust passage can also double as thermometric passage, it is to avoid individually opens up Thermometer hole, thus improve the heat insulation effect of high temperature furnace.

Preferably described crucible is graphite crucible.

Preferably, described induction coil is arranged between crucible outer wall and furnace shell inwall.

Preferably, described rotation dish lower end is equipped with multiple electrodes positioned at crucible internal upper part；This utility model passes through sensing The principle of heating heats to material, and upper electrode can also be inductively heated as thermal source, can fill when electrode rotary Divide stirring powder material, improve temperature homogeneity and the efficiency of heating surface.Be provided with preferably described rotary shaft, rotation dish and electrode according to Foreign gas is conveniently discharged by the exhaust passage of secondary connection in time.

As a kind of specific version, described electrode is tubular structure, and the lower end of this electrode is provided with oblique through hole, tiltedly Connect with the exhaust passage of electrode to through hole, can easily foreign gas be discharged by exhaust passage.

It is surprising that high temperature furnace operationally electrode also heats.In order to realize electrode heated target simultaneously, real Existing heated by electrodes and the double effectses of induction coil heating, improve the efficiency of heating surface, described electrode and the sensing of high temperature furnace further The distance between coil is 30mm-300mm；The distance between more preferably described electrode and induction coil are 50mm-200mm.

Preferably, described rotary shaft, rotation dish and electrode are graphite material and make.

In order to improve the service life of crucible, between described crucible outer wall and induction coil, it is provided with heat-insulation layer.

In order to improve the uniformity of heating-up temperature, facilitate stirring powder body, thus foreign gas is discharged, described rotation simultaneously The external part of axle and driving means are connected；The rotating speed of preferably rotary shaft is not higher than 6r/min, preferably 0-3r/min.

Preferably, described burner hearth is cylindric, and described charging aperture and discharging opening are arranged on the axial line of burner hearth.

Preferably, described powder body is natural flake graphite powder, amorphous graphite, electrographite powder, carbon negative pole material, tar At least one of carbon, bitumencarb, resin carbon, coal-based carbon.What deserves to be explained is, the ratio between each composition is not required, arbitrarily Ratio mixes.

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

1st, heated using induction heating mode, efficiency high, energy-conservation.Roof of the furnace is provided with electrode, permissible during work Equally heated, as multi-point heat sources, improve furnace body temperature uniformity.Multiple electrodes can also be inductively heated, as thermal source Powder material is heated, the high-temperature region time that material passes through is longer, heating is more abundant.

2nd, multi-electrode can rotate, and is more beneficial for overflowing of foreign gas stirring while material improves temperature homogeneity Go out, on the one hand make material heated more uniform, foreign gas is more prone to discharge, and on the other hand can adjust input and output material Speed, prevents the jam situation that Flow of Goods and Materials in stove does not freely lead to from occurring.

3rd, cleverly utilize electrode area design exhaust passage, exhaust passage when can overflow as foreign gas, no Need additional discharge duct, reduce the loss of heat.

4th, whole crucible is placed in the loss that not only can reduce heat in rustless steel closed furnace but also can completely cut off outside sky Gas.

5th, use heating in medium frequency, no low-voltage, high-current it is not necessary to lower pressure rectifier, reduce transformator copper loss and iron loss consumption, Its electrical heating efficiency improves 50%.

Brief description

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

Specific embodiment

To describe this utility model in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that not conflicting In the case of, the embodiment in this 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 powder body heat-treatment furnace, as shown in figure 1, comprising furnace shell 11, graphite crucible 4 in burner hearth, graphite crucible 4 The rotation dish 2 on top, the electrode 3 being connected with rotation dish 2 and rotary shaft 1, rotary shaft 1, rotation dish 2 and electrode 3 are provided with phase The passage of connection, can be used as the exhaust passage of foreign gas, and rotary shaft 1 is through insulation cover 10 and exhausted therewith by ceramic sleeve Edge, the one end outside positioned at burner hearth can connect tumbler, also include the heat-insulation layer 5 of crucible 4 outer layer and induction coil 6 and The cooling zone 7 of the feeding warehouse 9 positioned at gating location and the discharging opening positioned at bottom and receiving warehouse 8.Material is slow by feeding warehouse 9 Enter in crucible 4, electrode 3 rotates stirring thing material under external impetus, on the one hand makes the temperature in material more uniform, is conducive to Foreign gas in material is overflowed, and is discharged by the passage on electrode 3, and another aspect electrode 3 is inductively heated simultaneously, due to Fixing heat conductivity is far longer than the heat conductivity of powder body, and multiple electrodes heat to powder material as thermal source.

Described rotary shaft, rotation dish and electrode are graphite material.Described rotation dish and rotary shaft have phase after connection Logical duct.

Described electrode is tubular structure, and quantity is not less than 2, and electrode lower end has the oblique through hole of uniform arrangement.Described The distance between electrode and induction coil are set to 30-300mm, and preferential distance is 50-200mm.Described electrode rotary speed is not Higher than 6r/min, preferably 0-3r/min.

Described charging aperture and discharging opening are located on burner hearth axle center.

Described powder is natural flake graphite powder, amorphous graphite, electrographite powder, carbon negative pole material, tar carbon, Colophonium At least one of carbon, resin carbon, coal-based carbon.

The content that above-described embodiment illustrates should be understood to that these embodiments are only used for being illustrated more clearly that this utility model, Rather than limit scope of the present utility model, after having read this utility model, 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 (10)

1. a kind of powder body heat-treatment furnace, including the furnace shell (11) with closed furnace, is arranged on the crucible (4) in closed furnace, And it is arranged on the insulation cover (10) on furnace shell (11) top；Described insulation cover (10) has charging aperture, and this furnace shell (11) bottom is opened There is discharging opening；It is characterized in that, described crucible (4) outer wall is provided with induction coil (6)；Described crucible (4) internal upper part is provided with rotation Disk (2), and pass through the rotary shaft (1) that insulation cover (10) and rotation dish (2) are fixedly linked.

2. powder body heat-treatment furnace according to claim 1 is it is characterised in that the lower end of described rotation dish (2) is provided with stirring Projection, is equipped with, in this rotation dish (2), rotary shaft (1) and stirring projection, the exhaust passage being interconnected.

3. powder body heat-treatment furnace according to claim 1 is it is characterised in that described rotation dish (2) lower end is equipped with multiple positions Electrode (3) in crucible (4) internal upper part.

4. powder body heat-treatment furnace according to claim 3 is it is characterised in that described rotary shaft (1), rotation dish (2) and electricity Pole is provided with, in (3), the exhaust passage being sequentially communicated.

5. powder body heat-treatment furnace according to claim 3 it is characterised in that described electrode (3) be tubular structure, this electrode (3) lower end is provided with oblique through hole.

6. powder body heat-treatment furnace according to claim 3 is it is characterised in that between described electrode (3) and induction coil (6) Distance be 30mm-300mm.

7. powder body heat-treatment furnace according to claim 1 is it is characterised in that described induction coil (6) is arranged on crucible (4) Between outer wall and furnace shell (11) inwall.

8. powder body heat-treatment furnace according to claim 1 is it is characterised in that described crucible (4) outer wall and induction coil (6) Between be provided with heat-insulation layer (5).

9. the powder body heat-treatment furnace according to one of claim 1-8 is it is characterised in that the external part of described rotary shaft (1) It is connected with driving means.

10. the powder body heat-treatment furnace according to one of claim 1-8 is it is characterised in that described burner hearth is cylindric, described Charging aperture and discharging opening are arranged on the axial line of burner hearth.