CN102951654B

CN102951654B - Production process for synthetizing mica artificially

Info

Publication number: CN102951654B
Application number: CN201210474402.6A
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: 2015-02-04
Anticipated expiration: 2032-11-21
Also published as: CN102951654A

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

Artificial mica synthesis is produced and is usually adopted synthesis by internal resistance electric melting, its technical scheme mainly utilizes three-phase alternating current to carry out invariable power heating to the Graphite Electrodes in insulation stove, make the mixing raw material putting into burner hearth be warmed up to temperature higher than 1357 DEG C, raw material proceeds to cooling crystallization generation mica crystal from solid-state again to molten state within a certain period of time.

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

And the heat of upper end Relatively centralized heat release part easily exchanges in air and is unfavorable for thermal conduction, and increases calorific loss, is unfavorable for energy-conserving and environment-protective.

Summary of the invention

Main purpose of the present invention is to provide a kind of production technique improving the artificial mica synthesis of heating material homogeneity.

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 burner hearth and adopt electrode pair material to heat, electrode is vertically arranged, upper end electric discharge heating; It is characterized in that: after the material melts of top, the partial electrode in molten materials is blocked.

Then be easy to realize as electrode will be blocked, such as electrode is interrupted in molten materials with isolator, because molten materials density is greater than electrode usually, so the electrode after blocking floats naturally, can get rid of easily, or not get rid of also on production not impact.After material in stove all melting, continue heating, the stirring carrying out wanting when needing again can reach the technological temperature of regulation.

Further, the electrode length blocked described in 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, be also beneficial to the floating of the electrode after blocking and discharge.

Further, described operating in when melting material temperature is 1360 DEG C-1600 DEG C of electrode of blocking is carried out.Ensure that frit reaction material reaches technological temperature requirement, as long as accept thermal radiation after blocking to play heat insulation effect, without the need to stirring and heating further.

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

And in such production technique, because progressively move down the heat generating spot of heating material, so upper and lower the being heated evenly property of material of burner hearth significantly improves, both avoided burner hearth internal upper part localized hyperthermia and volatility of raw material is fallen, it also avoid localized hyperthermia causes feedstock conversion to become unorganic glass and can not form mica crystal; And after heat generating spot moves down, the molten materials on top plays heat-blocking action to external world, reduce overall heat loss.Therefore the present invention is improved by simple operation step, significantly improves product yield, increase rate heat utilization efficiency.The mica crystal output of producing is high, and mica crystal wafer is large, and energy consumption reduces, body of heater operating safety.

Accompanying drawing explanation

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, for quartz sand, aluminum oxide, potassium silicofluoride, salt of wormwood and magnesia for raw material production artificial mica synthesis.Raw material mixing is inserted in the burner hearth 1 of melting furnace, connects tri-phase current by wire 4 and power supply graphite cake 3, to be discharged heated material by the arc electrode 5 at three electrode 2 tips.After the material melts of top, blocked by the partial electrode 2 in molten materials, the electrode 2 after blocking as shown in Figure 3.Owing to can conduct electricity after raw materials melt, therefore electrode 2 can carry out electric discharge heating by molten materials after blocking.Electrode blocks length preferably herein: described in the electrode length that blocks be 500mm.

Preferred further, described operating in when melting material temperature is 1360 DEG C-1600 DEG C of electrode of blocking is carried out.

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

Block electrode in molten materials, electrode to be interrupted with isolator, because molten materials density is greater than electrode usually, so the electrode after blocking floats naturally, can get rid of easily, or do not get rid of also on production not impact.Described break-in operation is carried out repeatedly.Repeatedly block and hot spot is progressively moved down, material can be made to be heated more even.

Claims

1. a production technique for artificial mica synthesis, be included in burner hearth and adopt electrode pair material to heat, electrode is vertically arranged, upper end electric discharge heating; It is characterized in that: after the material melts of top, blocked by the partial electrode in molten materials, described electrode is Graphite Electrodes;

The electrode length blocked is 500mm;

Break-in operation is carried out repeatedly;

Block operating in when melting material temperature is 1360 DEG C-1600 DEG C of electrode to carry out.