CN111829344A - Artificial synthetic mica kiln and production method - Google Patents
Artificial synthetic mica kiln and production method Download PDFInfo
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- CN111829344A CN111829344A CN202010683805.6A CN202010683805A CN111829344A CN 111829344 A CN111829344 A CN 111829344A CN 202010683805 A CN202010683805 A CN 202010683805A CN 111829344 A CN111829344 A CN 111829344A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/36—Silicates having base-exchange properties but not having molecular sieve properties
- C01B33/38—Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type
- C01B33/42—Micas ; Interstratified clay-mica products
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
- F27D11/08—Heating by electric discharge, e.g. arc discharge
- F27D11/10—Disposition of electrodes
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Abstract
The invention discloses an artificially synthesized mica kiln, which comprises a kiln body with an opening at the top end and a graphite heating element arranged corresponding to the opening, wherein the graphite heating element is communicated with a power supply; the graphite heating body is connected with a lifting driving mechanism, and the lifting driving mechanism is used for adjusting the length of the graphite heating body extending into the furnace body. The artificially synthesized mica kiln adopts the liftable graphite heating element, and the concentrated heating part of the graphite heating element is closer to the unmelted raw material part by adjusting the position of the graphite heating element in the kiln body, so that compared with the heating element pre-embedded in the prior art, the artificially synthesized mica kiln avoids the repeated heating of the materials melted firstly; the heat transfer radiation area of the graphite heating element in the horizontal plane direction is maximized, and dead corners of partial raw materials in the furnace body which are not heated sufficiently and not melted are reduced or eliminated; the method is favorable for improving the output of monomer mica, the graphite electrode is repeatedly used, and the production cost is reduced. The invention also discloses a production method of the artificially synthesized mica.
Description
Technical Field
The invention relates to the technical field of artificial synthetic mica production, in particular to an artificial synthetic mica kiln and a production method thereof.
Background
The internal heating method production process of the artificially synthesized mica comprises the following steps: mixing fused magnesia, quartz powder, potassium fluosilicate, alumina powder and potassium carbonate which are used as raw materials for synthesizing mica according to a certain proportion, adding the mixture into a high-temperature furnace formed by refractory bricks, melting part of raw materials by utilizing a heating electrode, enabling the melted melt to be conductive, completely melting the raw materials, cooling to separate out crystals, separating the blank from the crystals, crushing and screening the crystal part, and the like to obtain a mica product.
In the mica internal heating method production process in the prior art, a graphite heating body is used as a heating element, for example, as described in CN102951654A, three graphite electrodes in a furnace body are vertically arranged, the bottom ends of the graphite electrodes are connected with a rod seat, the other end of the rod seat is protrudingly arranged outside the furnace body, the graphite electrodes are conducted with a power supply through the rod seat, a resistance wire or an ignition rod is connected between the top ends of the graphite electrodes, and the ignition rods are in contact conduction.
The mica production process based on the kiln structure comprises the following steps: the graphite electrode, the ignition rod and the rod seat are arranged in the furnace body in advance, raw materials mixed in proportion are put into the furnace body, the contact conduction position of the ignition rod has large resistance, so that the heating value is large, the temperature is high, the raw materials (top layer raw materials) around the top end of the ignition rod are molten, and after the top layer raw materials are molten, the contact conduction position of the ignition rod and/or the contact conduction position of the ignition rod and the graphite electrode are cut off or the ignition rod falls off; the top layer molten raw material is used as a conductor to conduct a circuit between the graphite electrodes, the top layer molten raw material is repeatedly heated, and heat is transferred to the lower layer of the top layer molten raw material, so that the lower layer raw material is promoted to reach a molten state. Because the height of the raw materials molten from top to bottom is gradually increased, the resistance between the graphite electrodes is gradually reduced, and the heat productivity is correspondingly gradually reduced. Compared with the top of the furnace body, the radius of the heat transfer radiation area of the graphite electrode heating element at the bottom of the furnace body is gradually reduced, which is also the reason that the radius of the horizontal section of the furnace body is gradually reduced from top to bottom in the prior art.
The prior mica production process has the defects that:
the graphite electrode and the ignition rod are all disposable, namely the graphite electrode and the ignition rod are coated in the mica crystal furnace charge and can be damaged when the mica furnace charge is crushed, so that the consumption of the graphite electrode and the ignition rod in the mica production is large, and the cost is high;
the raw materials of the second and top layers are heated repeatedly, the heating time is long due to the heating mode that heat is transferred to the raw materials of the lower layer, and the heat of the raw materials of the top layer can be dissipated through the furnace top, so that the heat utilization rate is influenced;
thirdly, as mentioned above, the gradual reduction of the horizontal cross section at the bottom of the furnace body can cause the dead angle of the furnace body, which is not melted due to insufficient heating of the raw materials, and reduce the output of single furnace products;
fourthly, because inevitable impurities exist in the raw materials, most of the impurities are discharged through furnace gas generated in the raw material heating process, the top layer material is firstly melted, the furnace gas of the lower layer material can only be discharged through gaps of refractory bricks of the furnace wall, but cannot be discharged through the furnace top like the top layer material, and the difference of the arrangement of the refractory bricks of the furnace wall inevitably causes the difference of crystallization effects among furnace bodies.
Disclosure of Invention
One of the purposes of the invention is to overcome the defects in the prior art and provide a synthetic mica kiln, which adopts a liftable graphite heating element to enable the concentrated heating part of the graphite heating element to be closer to the unmelted raw material, thereby improving the heat utilization rate, and the graphite heating element can be repeatedly utilized, thereby increasing the production cost and reducing the cost.
In order to achieve the technical effects, the technical scheme of the invention is as follows: an artificially synthesized mica kiln comprises a kiln body with an opening at the top end and a graphite heating element arranged corresponding to the opening, wherein the graphite heating element is communicated with a power supply; the graphite heating element is connected with a lifting driving mechanism, and the lifting driving mechanism is used for adjusting the length of the graphite heating element extending into the furnace body.
The preferable technical scheme is that the graphite heating body comprises three graphite electrodes, the graphite electrodes are communicated with a power supply, and an ignition piece is arranged between the graphite electrodes in a conduction manner; the graphite electrode is connected with a lifting driving mechanism.
The preferable technical scheme is that the three graphite electrodes are connected with the lifting driving mechanism through a base, the graphite electrodes are fixedly connected with the base, and the graphite electrodes are arranged in an insulating mode.
The preferable technical scheme is that the base and the opening are concentrically arranged, and the three graphite electrodes are uniformly distributed on the periphery of the center of the base.
The preferable technical scheme is that a raw material feeding hole is formed in the base.
The preferable technical scheme is that the bottom end of the furnace body is in a straight column shape.
The preferred technical scheme is that the ignition piece is arranged between the bottom ends of the graphite electrodes in a conducting manner.
The invention also aims to provide a production method of the artificial synthetic mica, which comprises the following steps:
s1: placing a graphite heating element in an inner cavity of a furnace body, wherein the graphite heating element is electrified through an opening of the furnace body;
s2: the raw materials are put into the furnace body, and the raw materials around the central heating part of the graphite heating body are heated and melted;
s3: lifting the graphite heating body which is conductive through the molten raw materials until the raw materials in the furnace body are completely molten;
s4: the graphite heating element is separated from the molten raw material.
The central heating part of the graphite electrode is the ignition part, the graphite electrode separated from the ignition part, or the graphite electrode is conductive through the molten raw material after the ignition part is cut off, and the central heating part of the graphite electrode is the end part of the graphite electrode inserted into the raw material and the molten raw material between the end parts of the adjacent graphite electrodes.
The preferable technical scheme is that the raw materials in the furnace body are added in batches.
The preferred technical scheme is that the graphite heating body comprises a graphite electrode which is vertically arranged and an ignition piece which is communicated with the graphite electrode; and S3 is that the ignition piece conducting structure between the graphite electrodes is cut off, the graphite electrodes are lifted and lowered, and the graphite electrodes are conducted through the molten raw materials in S2 until the raw materials in the furnace body are completely molten. Further, the step S3 is to cut off the ignition piece conduction structure between the graphite electrodes, lift the graphite electrodes, and conduct the graphite electrodes through the molten raw materials in the step S2 until the raw materials in the furnace body are completely molten.
The invention has the advantages and beneficial effects that:
the artificially synthesized mica kiln adopts the liftable graphite heating element, and the concentrated heating part of the graphite heating element is closer to the unmelted raw material part by adjusting the position of the graphite heating element in the kiln body, so that compared with the heating element pre-embedded in the prior art, the artificially synthesized mica kiln avoids the repeated heating of the materials melted firstly;
the heat transfer radiation area of the graphite heating element in the horizontal plane direction is maximized, and dead corners of partial raw materials in the furnace body which are not heated sufficiently and not melted are reduced or eliminated;
after the raw materials of the whole furnace are completely melted, the graphite heating element is lifted to be separated from the melted raw materials, so that the recycling of the graphite heating element can be realized, the workload of separating mica and the graphite heating element during furnace burden crushing can be reduced, and the production cost of artificially synthesized mica is reduced;
reduce the artificial synthetic mica furnace burden adhered to the graphite heating body part and improve the output of the mica in a single furnace.
Drawings
FIG. 1 is a schematic structural diagram of a synthetic mica kiln of example 1;
FIG. 2 is a diagram showing a state of use of the synthetic mica kiln of example 1;
FIG. 3 is a schematic structural view of the synthetic mica kiln of example 2;
FIG. 4 is a front view of a structure for connecting a susceptor to a graphite electrode in example 2;
FIG. 5 is a schematic top view of the susceptor in embodiment 2;
FIG. 6 is a view showing a state of use of the synthetic mica kiln of example 2;
in the figure: 1. a furnace body; 2. a graphite heating element; 21. a graphite electrode; 22. an ignition bar; 3. a lifting drive mechanism; 31. a base; 32. a winch; 33. a cantilever; 4. a raw material inlet; 5. a base; 51. perforating; 52. a refractory brick; 6. driving a vehicle; 7. a cover body.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The graphite heating body is a known structural member, and the selection of the graphite heating body mainly depends on whether the heat transfer radiation range is matched with the furnace body or not and whether the heating amount can meet the temperature requirement of the artificially synthesized mica or not. The structure of the graphite heat-generating body is different from one another, and the concentrated heat-generating part is different from another. The conducting connection structure of the graphite electrode and the ignition piece is more suitable for the process requirement of artificially synthesizing mica, and the ignition piece is not limited to an ignition rod in the prior art and also comprises known resistance wires and other ignition structures.
The operation of the graphite heat-generating body is not limited to the ascending but may include descending, and preferably, the ascending resistance of the molten raw material to the graphite heat-generating body is smaller in the ascending process based on the graphite heat-generating body in which the concentrated heat-generating part is located at the bottom, and therefore, it is preferable that the graphite heat-generating body is descended to the lowest position and then the graphite heat-generating body is gradually ascended in the production process of the synthetic mica.
The lifting driving mechanism for lifting and lowering the graphite heating element is required to be in hard connection with the graphite heating element, for example, the graphite heating element is connected with a piston rod of a hydraulic oil cylinder, and the lowering of the graphite heating element is required to take the interaction force of the raw materials on the graphite heating element and the strength of the graphite heating element into consideration; the equipment for embedding the graphite heating body in the raw material and realizing the lifting is in hard connection or soft connection with the graphite heating body, wherein the soft connection comprises but is not limited to hoisting equipment such as a crane and a small crane capable of moving to the vicinity of the furnace body.
The preferred graphite heating element is a conductive connection structure of a graphite electrode and an ignition rod known in the art. The number of graphite electrodes is three (using a three-phase ac power supply), and as described in the prior art, the connection between the ignition bar and the graphite electrodes is typically: the ignition rods correspond to the graphite electrodes in number one to one, one end of each ignition rod is connected with the graphite electrode, and the other end of each ignition rod is connected in a gathering mode.
The graphite electrodes can be synchronously driven by the lifting driving devices which correspond to the graphite electrodes one by one, and the graphite electrodes can also be fixedly arranged on the base, and the lifting driving devices and the base realize the synchronous lifting of the graphite electrodes. The lifting driving device of the latter scheme in the two schemes is simpler in structure, the heights of the graphite electrodes can be kept strictly consistent, the resistances of the molten raw materials between the graphite electrodes are consistent, and the heights and the horizontal widths of the heat radiation areas of the graphite electrodes in the furnace body are ensured to be consistent. The graphite electrodes are not uniform in height, and when an end of a graphite electrode is positioned in an unmelted raw material, the current between the graphite electrodes cannot form a path, and the graphite electrode does not generate heat. As the alternative of base, can also set up the lid on the uncovered of furnace body, be provided with on the lid and wear to establish graphite electrode and with graphite electrode clearance fit's guiding hole, nevertheless need ensure that graphite electrode promotes the in-process and not contact each other.
The base is concentrically arranged with the opening of the furnace body, and also ensures that the radiation area of the graphite electrode heat transfer on the horizontal plane is consistent with the inner cavity of the furnace body. Furthermore, the horizontal section of the furnace body is circular.
The graphite electrodes on the pedestal are arranged in an insulating way, and the method comprises the following schemes: the susceptor is an insulating material and the perforations that mate with the graphite electrodes are spaced apart, or the susceptor is not in direct contact with the graphite electrodes and is spaced apart by an insulating material, such as refractory bricks or other known insulating materials.
The raw materials feed inlet can set up on the furnace body and with the uncovered dislocation set of furnace body, also can directly utilize the top of furnace body uncovered, because the fixed graphite electrode of base, via the raw materials feed inlet on the base drop into raw materials (mix the powder), have mobile raw materials and can be by the center to collapsing all around, help the evenly distributed of raw materials in the furnace body.
The bottom end of the furnace body can be in a closed shape (a drum kiln) in the prior art or in a straight column shape. The graphite heating body is driven by the lifting driving mechanism to lift, and the heat transfer radiation areas of the concentrated heating parts of the graphite heating body tend to be consistent on the horizontal plane (the heat transfer radiation areas of the three-phase graphite electrode heating body are circular), so that the bottom end of the furnace body is arranged into a straight column shape, and the heat utilization rate of the graphite heating body can be improved. Compared with the furnace body with the top end and the bottom end all closed in the prior art, the vertical column-shaped furnace body is more convenient to stack.
In view of the fact that a certain amount of furnace shell materials (materials formed by heating and melting raw materials close to the furnace wall) can be paved on the furnace bottom in the prior art, the ignition rod can be conducted and arranged between the middle parts of the graphite electrodes, namely, the graphite electrode section positioned below the ignition rod can be inserted into the furnace shell materials paved on the bottom. Further preferably, the ignition rod is conducted and arranged between the bottom ends of the graphite electrodes, the length of the graphite electrodes can be controlled to be shortened, and the height of the production space required by the graphite electrodes can be controlled to be reduced. Correspondingly, the conducting structure of the ignition rod between the graphite electrodes in the mica production process is cut off, so that the graphite electrodes are ensured to be conducted through the molten raw materials in S2 while the graphite electrodes are improved; until the raw materials in the furnace body are completely melted. The lifting action is gradual lifting or continuous lifting at a slow speed.
The raw materials in the furnace body can be added at one time or added in batches, and the batch addition has the advantages that: the inevitable materials in the raw materials are discharged through furnace gas, the unmelted raw materials above the melted raw materials are excessive, the furnace gas containing impurities can only be released through the furnace wall, the release amount is limited, the raw materials are added in batches, the thickness of the unmelted raw materials on the upper layer of the melted raw materials can be reduced, the furnace gas containing impurities is discharged through the top surface of the raw materials, the impurities can be fully discharged, and the mica quality is improved. In addition, the raw materials are blanked through the opening of the furnace body, the solid powder partially sinks into the molten raw materials due to gravity, and the molten raw materials are more conducive to rapid melting of the post-added raw materials in a coated state. Based on the same material feeding amount, furnace body structure and graphite heating body, the heating time for the raw materials to reach the molten state is shorter.
After mica is heated for use, the surface of the graphite electrode reacts with oxygen in furnace gas to generate loss, and the graphite electrode with the surface loss can be repeatedly used.
The connection relation between graphite electrode and ignition rod is for tying up or other connected mode, and graphite electrode and ignition rod's conducting structure cuts after reaching the raw materials melting, and one mode is that the junction of graphite electrode and ignition rod takes place to drop, can be that the tying up material melts under the melting raw materials temperature condition, or leads to the tying up material fracture because of the coefficient of thermal expansion mismatch, or when promoting graphite electrode and ignition rod again, utilizes the resistance of the raw materials to ignition rod that does not melt to make ignition rod and graphite electrode break away from mutually. Specifically, the binding materials are graphite wires and electric fuses; another way is that the ignition bar itself breaks. The ignition rod is a thin graphite electrode, and the melting raw material and/or furnace gas exert acting force on the ignition rod to cut off the ignition rod.
Example 1
As shown in fig. 1-2, the artificially synthesized mica kiln of example 1 includes a kiln body 1 with an opening at the top end, the bottom end of the kiln body 1 is in a closed shape as in the prior art, and the kiln further includes a graphite heating element 2 corresponding to the opening, and the graphite heating element 2 is communicated with a power supply; the graphite heating element 2 is connected with a lifting driving mechanism 3, and the lifting driving mechanism 3 is used for adjusting the length of the graphite heating element 2 extending into the furnace body.
The graphite heating body 2 comprises three graphite electrodes 21, the graphite electrodes 21 are communicated with a power supply, ignition rods 22 are communicated between the graphite electrodes 21, and the ignition rods 22 are connected with the graphite electrodes 21 through graphite wires and electric fuses in a binding mode; the graphite electrode is connected with a lifting driving mechanism 3.
A cover body 7 is arranged in an opening of the furnace body 1, a guide hole matched with the graphite electrode 21 is arranged on the cover body 7, and the top end of the graphite electrode is connected with the lifting driving mechanism 3 through a flexible cable; the top wall of the furnace body 1 at the periphery of the cover body 7 is provided with a raw material feeding hole 4. The cover body 7 is also provided with a hollow hole.
The lifting driving mechanism 3 in embodiment 1 is a small crane known in the prior art, and includes a base 31, a hoist 32, and a boom 33, the boom 33 is extended and disposed above the furnace body 1, and a lifting rope of the hoist 32 is connected to a flexible rope, for example, hooked.
The three graphite electrodes 21 are arranged around the center of the furnace body 1 with equal height and are uniformly distributed on the periphery of the center of the furnace body 1. The ignition rod 22 is conductively disposed between the bottom ends of the graphite electrodes 21.
Example 1 the production method of synthetic mica was:
s1: the conducting structure of the graphite electrode 21 and the ignition rod 22 is hung in the furnace body, and the ignition rod 22 is positioned at the bottom of the inner cavity of the furnace body;
s2: putting all the materials of the whole furnace into the furnace body;
s3: the graphite electrode is electrified, the ignition rod generates heat, the heat is transferred to the raw materials around the ignition rod until the materials around the ignition rod are melted, and the ignition rod and the graphite electrode are in a binding structure;
s4: the crane synchronously lifts the three graphite electrodes 21, the end parts of the graphite electrodes 21 are positioned in the molten raw materials, and the raw materials on the upper layer of the molten raw materials are heated and molten;
s5: repeating S4 until the whole furnace material is completely melted;
s6: the graphite electrode was lifted off the molten feedstock.
Example 2
As shown in fig. 3 to 6, example 2 is based on example 1 except that the bottom end of the furnace body 1 is a straight column. Three graphite electrodes 21 are connected with travelling crane 6 through base 5, are provided with spaced perforation 51 on the base 5, and perforation 51 is enclosed by the resistant firebrick 52 of being connected with base 5 and closes and forms, resistant firebrick spaced graphite electrode 21 and base 5, graphite electrode 21 wear to locate in the perforation, and the connection end of graphite electrode 21 and base 5 is provided with the external screw thread, and the external screw thread is connected with the nut cooperation.
The base 5 is provided with a raw material inlet 4.
The using process of the embodiment 2 is based on the embodiment 1, and the difference is that the travelling crane lifts the base 5 to realize synchronous lifting of the three graphite electrodes 21; the raw materials were fed in portions.
Comparative example 1
Comparative example 1 is a pre-embedded three-phase graphite electrode heating device in the prior art (disclosed in CN102951654 a), three graphite electrodes are vertically arranged in a furnace, the positions of the graphite electrodes and the binding structure of an ignition rod are the same as those in example 1.
The height of the furnace used in the comparative example 1 is 2m, the inner diameter of the bottom of the furnace is 2.3m, the maximum inner diameter of the middle part of the furnace body is 2.8m, the feeding amount in the furnace body is 14000kg, and the feeding depth is 1.8 m;
the graphite heat-generating body includes the one end gathering of ignition stick (three ignition sticks and ties up from top to bottom, and the other end and the first graphite rod of ignition stick tie up, and the material of tying up is graphite line and electric fuse), first graphite rod, second graphite rod (with first graphite rod threaded connection) and extend to the outer stick seat of furnace body (with second graphite rod threaded connection), and the voltage of the power that the graphite rod connects is 380V. The graphite heater component has the following dimensions:
an ignition rod: a high-purity graphite rod with the diameter of 15mm and the length of 300 mm;
a first graphite rod: a high-purity graphite rod with the diameter of 40mm and the length of 700 mm;
a second graphite rod: a high-purity graphite rod with the diameter of 80mm and the length of 800 mm;
a rod seat: 1300mm 160mm 50mm, high purity graphite plate.
The graphite heat-generating body in example 1 was composed of a third graphite rod (connected to the external power supply), a fourth graphite rod (connected to the third graphite rod in a rib pattern), and an ignition rod (the connection structure between the ignition rod and the fourth graphite rod, the connection structure between the ignition rods, and the size of the ignition rod were the same as in comparative example 1), and the dimensions of the graphite heat-generating body components were as follows:
a third graphite rod: the diameter is 120mm, and the length is 400 mm;
a fourth graphite rod: the diameter is 60mm, and the length is 2000 mm.
Example 1 the rise of the graphite rod was judged by detecting the temperature of the material in the furnace.
The artificially synthesized mica raw material in the furnace body consists of 36 percent of quartz sand (the purity is more than or equal to 99 percent), 29 percent of magnesium oxide (the purity is more than or equal to 97 percent), 11 percent of aluminum oxide (the purity is more than or equal to 98.5 percent), 20 percent of potassium fluosilicate (the purity is more than or equal to 99 percent) and 4 percent of potassium carbonate (the purity is more than or equal to 98.5 percent).
The whole furnace melting time and the power consumption of example 1 and comparative example 1 were compared as follows:
| example 1 | Comparative example1 | |
| Length of time of whole furnace melting/ |
51 | 60 |
| Average power consumption/degree | 7500 | 9000 |
Based on the same voltage and the same raw material feeding amount, on the basis of the comparative example 1, the whole furnace melting time of the example 1 is shortened by nearly 15%, and the power consumption is also reduced by about 16.7%.
in example 2, the diameters of the third graphite rod and the fourth graphite rod are the same as those of example 1, except that the length of the third graphite rod is 1000mm, the length of the fourth graphite rod is 800mm, and the length of the graphite electrode in the furnace charge is controlled to be 500-600 mm. Example 2 the elevation of the graphite rod was also judged by measuring the temperature of the material in the furnace.
Based on the same furnace charge crushing process and screening process, the raw material utilization rate of the mica kiln and the quality of a mica finished product are compared as follows:
the method for calculating the utilization rate of the raw materials of the mica kiln comprises the following steps: mass of mica produced by crystallization/charge per furnace) 100%;
the quality of the mica finished product is measured by the mass ratio of plus 4 meshes to minus 4 meshes in the mica finished product: and screening the finished product through a 4-mesh screen, wherein mica retained on the screen is of a plus 4 mesh, and screened mica is of a minus 4 mesh. The mica kiln raw material utilization and plus-minus 4 mesh comparisons of example 1 and example 2 are as follows:
as can be seen from the above table, the use ratio of raw materials of the mica kiln can be improved by providing the furnace bottom portion of example 2 in a straight cylindrical shape as compared with the drum furnace body of example 1. In addition, the mica raw material is added into the furnace body in batches, and the proportion of positive 4 meshes in the mica finished product can be increased by matching with the lifting of the graphite heating body, so that the obtained mica sheet has larger average size, and the quality of the mica finished product is improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. An artificially synthesized mica kiln is characterized by comprising a kiln body with an opening at the top end and a graphite heating element arranged corresponding to the opening, wherein the graphite heating element is communicated with a power supply; the heating furnace is characterized in that the graphite heating body is connected with a lifting driving mechanism, and the lifting driving mechanism is used for adjusting the length of the graphite heating body extending into the furnace body.
2. The synthetic mica kiln of claim 1, wherein the graphite heating element comprises three graphite electrodes, the graphite electrodes are communicated with a power supply, and an ignition piece is arranged between the graphite electrodes in a conducting manner; the graphite electrode is connected with a lifting driving mechanism.
3. The synthetic mica kiln of claim 2, wherein three graphite electrodes are connected with the lifting driving mechanism through a base, the graphite electrodes are fixedly connected with the base, and the graphite electrodes are arranged in an insulating manner.
4. The synthetic mica kiln of claim 3, wherein said base is concentric with said opening, and three of said graphite electrodes are uniformly distributed about a central periphery of said base.
5. The synthetic mica kiln of claim 2, wherein the base is provided with a raw material inlet.
6. The synthetic mica kiln of claim 1, wherein the bottom end of the kiln body is in the shape of a straight cylinder.
7. The synthetic mica kiln of claim 1, wherein the ignition element is conductively disposed between the bottom ends of the graphite electrodes.
8. A production method of artificially synthesized mica is characterized by comprising the following steps:
s1: placing a graphite heating element in an inner cavity of a furnace body, wherein the graphite heating element is electrified through an opening of the furnace body;
s2: the raw materials are put into the furnace body, and the raw materials around the central heating part of the graphite heating body are heated and melted;
s3: lifting the graphite heating body which is conductive through the molten raw materials until the raw materials in the furnace body are completely molten;
s4: the graphite heating element is separated from the molten raw material.
9. The method for producing synthetic mica according to claim 8, wherein the raw materials in the furnace body are added in portions.
10. The method for producing synthetic mica according to claim 8 or 9, wherein the graphite heat-generating body comprises a vertically arranged graphite electrode and an ignition member communicating with the graphite electrode; and S3 is that the ignition piece conducting structure between the graphite electrodes is cut off, the graphite electrodes are lifted and lowered, and the graphite electrodes are conducted through the molten raw materials in S2 until the raw materials in the furnace body are completely molten.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010683805.6A CN111829344A (en) | 2020-07-16 | 2020-07-16 | Artificial synthetic mica kiln and production method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010683805.6A CN111829344A (en) | 2020-07-16 | 2020-07-16 | Artificial synthetic mica kiln and production method |
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