CN102951654A

CN102951654A - Production process for synthetizing mica artificially

Info

Publication number: CN102951654A
Application number: CN2012104744026A
Authority: CN
Inventors: 杨维新
Original assignee: SICHUAN LEADER MICA CO Ltd
Current assignee: SICHUAN LEADER MICA CO Ltd
Priority date: 2012-11-21
Filing date: 2012-11-21
Publication date: 2013-03-06
Anticipated expiration: 2032-11-21
Also published as: CN102951654B

Abstract

The invention relates to a production process for synthetizing mica artificially, in particular to a production process with even heating for synthetizing mica artificially. The production process includes the steps of: heating the material in a hearth through electrodes which are vertically arranged with the upper ends discharging for heating; and after the material at the upper part is melted, cutting off part of the electrodes inside the melted material. In the production process, the material is evenly heated, so the yield of mica is high, volatilization of the material due to local high temperature at the upper part inside the hearth is avoided, and energy waste and influence to the yield caused by the local high temperature are avoided. With the production process, the yield of mica crystals is high, the wafers of the mica crystals are big, the energy consumption is reduced and the furnace is safe in operation.

Description

The production technique of artificial mica synthesis

Technical field

The present invention relates to a kind of production technique of artificial mica synthesis.

Background technology

Synthesis by internal resistance electric melting is adopted in artificial mica synthesis production usually, its technical scheme mainly is to utilize three-phase alternating current that the Graphite Electrodes in the insulation stove is carried out permanent power heating, be warmed up to temperature and be higher than 1357 ℃ so that put into the mixing raw material of burner hearth, raw material changes cooling crystallization over to molten state again and generates mica crystal from solid-state within a certain period of time.

Existing synthesis by internal resistance electric melting is produced can satisfy product requirement substantially, but the heat exchange pattern that adds thermal recovery in the process of its synthetic mica is point discharge, and namely electrode is vertically arranged, its upper end heating is the fastest, and material is the earliest melting also.Then heat is conducted to planar radial and vertical direction by raw material by the top of burner hearth, and therefore, fire box temperature overall thermal balance is very slow.And stove upper end raw material appears because being heated for a long time vitrifying but not output mica crystal; The material of lower furnace portion is then because the slower melting of being heated is slow.Generally the material inequality of being heated in the prior art causes the products production Quality Down.Main manifestations is: so can not reach comparatively high temps and have influence on the mica wafer size because the lower furnace portion material is difficult to melting burner hearth bulk temperature; The more yield that directly has influence on the finished product in the interference source that is subject in the temperature conductive process from top to bottom.

And the heat of the relatively concentrated heat release part in upper end easily exchanges to and is unfavorable for thermal conduction in the air, and has increased calorific loss, is unfavorable for energy-conserving and environment-protective.

Summary of the invention

Main purpose of the present invention provides a kind of production technique that improves the inhomogeneity artificial mica synthesis of heating material.

For achieving the above object, the technical solution adopted in the present invention is: a kind of production technique of artificial mica synthesis, and be included in and adopt the electrode pair material to heat in the burner hearth, electrode is vertically arranged, upper end discharge heating; It is characterized in that: after the material melting of top, the partial electrode in the molten materials is blocked.

Then be easy to realize as for blocking electrode, for example electrode is interrupted in molten materials with isolator, because molten materials density is usually greater than electrode, so the electrode after blocking floats naturally, can get rid of easily, perhaps not get rid of also on producing not impact.Material all continues heating after the melting in stove, and the stirring of wanting again when needing can reach the technological temperature of regulation.

Further, the described electrode length that blocks is 500mm.

Further, described break-in operation is carried out repeatedly.Namely will put electrically heated center gradually lower furnace portion move.

Further, described electrode is Graphite Electrodes.Save cost, the electrode floating that also is beneficial to after blocking is discharged.

Further, describedly block operating in when melting material temperature has been 1360 ℃-1600 ℃ of electrode and carry out.Guarantee that the frit reaction material reaches the technological temperature requirement, play heat insulation effect as long as accept thermal radiation after blocking, need not to stir and further heating.

After adopting technique scheme: after upper electrode is partly blocked, the electrode that stays after blocking continues to heat up equally to the radial and axial radiations heat energy of raw material in the burner hearth and intensification, and to the Distance Shortened of not melting and low-temperature material heat conduction, ensure monoblock stove melted by heating balance; Reduce simultaneously the volatilization of indivedual raw material localized hyperthermia, caused the weight percent of composition of raw materials to change the problem of loss; Electrode blocks rear dissipation of heat center and relatively concentrates on the burner hearth center, and heats is better.Because of the melting of material of the electrode upper-end part of driving that blocks, material itself can play electric action simultaneously, does not affect the electrode discharge heating.

And in such production technique, because the heat generating spot to heating material progressively moves down, being heated evenly property of material significantly improves about the burner hearth so, both avoided burner hearth internal upper part localized hyperthermia and so that volatility of raw material falls, also avoided localized hyperthermia to cause feedstock conversion to become unorganic glass and can not form mica crystal; And after heat generating spot moved down, the molten materials on top played heat-blocking action to external world, had reduced the overall heat loss.Therefore the present invention improves by the simple operation step, has significantly improved product yield, increase rate heat utilization efficiency.The mica crystal output of producing is high, and the mica crystal wafer is large, Energy Intensity Reduction, body of heater operating safety.

Description of drawings

Fig. 1 is the structural representation of stove of the present invention;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the structural representation of the stove after electrode of the present invention is truncated.

Embodiment

As shown in Figure 1, 2, take quartz sand, aluminum oxide, potassium silicofluoride, salt of wormwood and magnesia as the raw material production artificial mica synthesis as example.Raw material mixed insert in the burner hearth 1 of melting furnace, connect tri-phase currents by wire 4 and power supply graphite cake 3, arc electrode 5 discharges by three electrode 2 tips add thermal material.After the material melting of top, the partial electrode 2 in the molten materials is blocked, the electrode 2 after blocking is as shown in Figure 3.Owing to can conduct electricity after the raw materials melt, therefore electrode 2 can be by the molten materials heating of discharging after blocking.Electrode blocks length preferably herein: the described electrode length that blocks is 500mm.

Further preferred, describedly block operating in when melting material temperature has been 1360 ℃-1600 ℃ of electrode and carry out.

Electrode materials as artificial mica synthesis can be graphite, also can be the high materials of fusing point such as copper-tungsten or silver tungsten.Described electrode is Graphite Electrodes, because Graphite Electrodes is comparatively cheap.

Blocking electrode can interrupt electrode in molten materials with isolator, because molten materials density usually greater than electrode, so the electrode after blocking floats naturally, can be got rid of easily, does not perhaps get rid of also on producing not impact.Described break-in operation is carried out repeatedly.Repeatedly block so that hot spot progressively moves down, material is heated more even.

Claims

1. the production technique of an artificial mica synthesis is included in and adopts the electrode pair material to heat in the burner hearth, and electrode is vertically arranged, upper end discharge heating; It is characterized in that: after the material melting of top, the partial electrode in the molten materials is blocked.

2. the production technique of a kind of artificial mica synthesis according to claim 1, it is characterized in that: the described electrode length that blocks is 500mm.

3. the production technique of a kind of artificial mica synthesis according to claim 1, it is characterized in that: described break-in operation is carried out repeatedly.

4. the production technique of a kind of artificial mica synthesis according to claim 1, it is characterized in that: described electrode is Graphite Electrodes.

5. the production technique of a kind of artificial mica synthesis according to claim 1 is characterized in that: describedly block operating in when melting material temperature has been 1360 ℃-1600 ℃ of electrode and carry out.