CN201880886U - Heating device of aluminum liquid flow groove - Google Patents

Abstract

The utility model relates to a heating device of an aluminum liquid flow groove, comprising an electric heater with an insulating structure, and further comprising a power supply circuit, a temperature control instrument and a temperature sensor, wherein the electric heater with the insulating structure can be movably arranged on the aluminum liquid flow groove; the power supply circuit supplies power to the electric heater and is provided with a controlled end; and the temperature sensor is used for detecting the atmosphere temperature or the aluminum liquid temperature in the flow groove, is connected with an inlet of the temperature control instrument, and an outlet of the temperature control instrument is connected with the controlled end of the power supply circuit. In the heating device of the aluminum liquid flow groove, the flow groove can be heated in a more uniform and energy-saving manner, environmental pollution in the heating process of the flow groove can be eliminated, bag influence of opened type burning temperature to peripheral equipment of the flow groove is avoided, and larger environmental and economic benefits are created for enterprises and the society.

Description

A kind of aluminium spout heater

Technical field

The utility model relates to the smelting processing unit (plant), and more particularly, the utility model relates to a kind of aluminium and smelts processing unit (plant).

Background technology

At present, the aluminium industry generally adopts continuous casting and rolling or semicontinuous casting technique to produce aluminium.These two kinds of technologies are in process, and high temperature aluminum liquid successively arrives lip or casting well by holding furnace, depassing unit, filter from smelting furnace again through the chute drainage.In this process, characteristics at the easy moisture absorption of chute, need toast preheating to chute, traditional processing technology is to adopt diesel oil directly chute to be burnt heating through the spray gun burner, and conventional lance is burnt heating and is difficult to accurately control equably temperature, and there is impurity in diesel oil, always follow the release of volume of smoke in the heating process, the severe contamination production environment, and, the open high temperature that burns generation also can shorten near the service life of the equipment of chute, brings economic loss to enterprise.

Summary of the invention

Above-mentioned shortcoming at prior art, the purpose of this utility model is that a kind of aluminium spout heater will be provided, it has following advantage: can more evenly implement heating to chute energy-conservationly, and can eliminate the environmental pollution in the chute heating process, avoid open harmful effect of burning high temperature, be enterprise and bigger environment and the economic benefit of society's creation the chute peripheral equipment.

For this reason, technical solution of the present utility model is a kind of aluminium spout heater, described heater comprises the electric heater that has insulation construction, the electric heater of band insulation construction is arranged on aluminium spout top movably, and described heater also is included as the temperature detector of atmosphere temperature in the power supply circuits with controlled end, temperature controller and the detection chute of electric heater power supply or temperature of aluminum liquid, this temperature detector is connecting the inlet of temperature controller, and the outlet of temperature controller is connecting the controlled end of described power supply circuits.

Aluminium spout heater of the present utility model, adopt electrical heating to substitute original diesel oil and burn heating, the atmosphere in the employing temperature detector on-line monitoring chute or the temperature of aluminium liquid, and be the temperature inversion of atmosphere in the chute or aluminium liquid that on-the-spot feedback signal participates in temperature control system, regulate output power, thereby form closed-loop control chute or temperature of aluminum liquid.Because electrical heating and corresponding closed-loop control, make more evenly energy-conservation and then provide good chute temperature environment for casting or casting to the heating of chute, for the production of high-quality aluminium provides better support, can effectively promote the productive rate of high-quality aluminium, and the improvement of chute heater has been eliminated and has been burnt the problem of environmental pollution that brings of baking originally, the infringement of also having avoided near the equipment Yin Gaowen of chute to bring is that enterprise and society bring bigger environment and economic benefit.This heater movably is arranged on chute top, and a cover heater can be neatly, chute or the aluminium liquid to different production lines adds thermal control movably.

The data of trial run show through one period: the utility model electric heater unit not only heating cost only accounts for traditional diesel oil and burns about 20% of heating cost, and not only there is not smoke contamination in the electrical heating process, also can avoid the harmful effect of high temperature that traditional open mode of burning produces to the chute peripheral equipment, therefore, technical economic benefit of the present utility model is significantly considerable.

Be the bonding strength of the insulation of further optimizing heater and temperature control performance and frame for movement and mechanical and electrical safety, reliability, the utility model also comprises following improvement:

Described insulation construction comprises that the chute steel with insulating lining covers, is located at the insulating sheath at chute steel lid two ends, and described electric heater is assemblied in the interior electrical bar of described chute steel lid for the insulating sheath by chute steel lid two ends.

Described insulating lining comprises the alumina silicate rock wool, and described insulating sheath is to be made by alumina silicate, and described electrical bar is to be made by silicon carbide material.

Described chute steel lid two ends also are provided with the protective cover of steel, and the terminals of described electrical bar and conductive connection are all overlayed in this protective cover.

At present, the aluminium industry generally adopts founding production line or casting and rolling the production line to produce the aluminium volume, founding or casting and rolling the production line generally include smelting furnace, holding furnace, chute, depassing unit, filter, casting machine or casting and rolling machine, the chute of production line is longer, when aluminium liquid arrives casting machine or casting and rolling machine, the temperature of aluminium liquid can descend, and can not satisfy technological requirement, causes the aluminium lumber recovery low.For addressing these problems, make temperature of aluminum liquid in the chute can guarantee, eliminate the solid phenomenon of chute place aluminium water-setting, prevent that the inhomogeneous aluminium liquid that may cause of temperature of aluminum liquid from blowing out accident that the utility model also comprises following improvement in controlled range:

The electric heater of band insulation construction covers on the chute between casting and rolling the production line filter and the lip.

The electric heater of band insulation construction covers on founding production line filter and the chute of casting between the well.

The inwall of described insulating lining and described chute are wide, and the inwall length of described insulating lining is the 50-90% of described section chute length.

Be further control accuracy, the energy saving of optimizing the control system of aluminium smelting chute, the utility model also comprises following improvement:

Described power supply circuits comprise the bidirectional triode thyristor element and connect the circuit of composition; Described temperature controller comprise set and the thermometer of displays temperature with exchange phase shift trigger, the inlet of this thermometer is connecting described temperature detector, the output of this thermometer is connecting the input that exchanges phase shift trigger, and the triggering mouth that exchanges phase shift trigger is connecting the controlled end of described bidirectional triode thyristor element power supply circuits.

For further improving the temperature controlled ease for operation of heater, the changeable property between human-machine operation, the utility model also comprises following improvement:

Described heater also comprises the commutation circuit of switching controls, this commutation circuit comprise contactor coil and be connected in power supply and described power supply circuits between contacts of contactor.

Described heater also comprises contacts of contactor and the corresponding contactor coil between the input that is connected in described thermometer output and exchanges phase shift trigger.

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Description of drawings

Fig. 1 is the control principle schematic diagram of the utility model aluminium spout heater embodiment.

Fig. 2 looks schematic diagram for the master of heater among Fig. 1 embodiment.

Fig. 3 is that the A-A of Fig. 2 is to cross-sectional schematic.

Fig. 4 is that the B-B of Fig. 2 is to cross-sectional schematic.

Fig. 5 is that the C of electrical bar and conductive connection terminals among Fig. 2 is to partial schematic sectional view.

The specific embodiment

As Fig. 1, be depicted as the control principle schematic diagram of the utility model aluminium spout heater embodiment.Press the top-down flow direction of aluminium liquid, casting and rolling the production line comprises smelting furnace (do not give and illustrating), holding furnace 10, aluminium spout 20, depassing unit 11, filter 12, preceding case chute 201, lip 13 in regular turn, described heater covers on 201 mouthfuls of the filter 12 of casting and rolling the production line and the preceding case chutes between the lip 13, it comprises the electric heater 32 of band insulation construction (referring to Fig. 2-4) and with the power supply circuits 30 of controlled end 31, and these power supply circuits 30 comprise the double silicon control element and connect the circuit of composition and it is connected between power supply N, L and the described electric heater 32; Described heater also comprises temperature controller 40 and surveys aluminium liquid in the chute or the temperature detector 41 of the temperature of atmosphere, the thermometer 42 that described temperature controller 40 comprises setting/displays temperature with exchange phase shift trigger 43, the inlet of this thermometer 42 is connecting described temperature detector 41, the output of this thermometer 42 is connecting the input that exchanges phase shift trigger 43, and the triggering mouth that exchanges phase shift trigger 43 is connecting the controlled end 31 of described bidirectional triode thyristor element power supply circuits 30.

Described heater also comprises the commutation circuit 50 of switching controls, this commutation circuit 50 comprises and is connected in power supply N, L and described for the contacts of contactor 51 between the thyristor circuit 30, and contactor coil 51K, on 51K and be connected with the indicator lamp H1 that indication heating is carried out, this commutation circuit also comprises the contacts of contactor 521 between the input that is connected in described thermometer 42 outputs and exchanges phase shift trigger 43, and corresponding contactor coil 52K, contactor coil 52K is the make break contact 522 of control contactor coil 51K also, and the make break contact 523 of himself, and S1, S2 is total startup contact of commutation circuit 50.Between contacts of contactor 51 and power supply N, L, also be connected with hand switch Q1, be connected with the motor meter P1 that monitors heating current.

As Fig. 2-5, shown in be respectively the schematic diagram at a plurality of visual angles of heater among Fig. 1 embodiment.Described insulation construction comprises that the chute steel with insulating lining 61 covers 60, is located at the insulating sheath 62 that the chute steel covers 60 two ends, and described electric heater 32 covers 60 interior electrical bars for the insulating sheath 62 that covers 60 two ends by the chute steel is assemblied in described chute steel.

Described insulating lining 61 comprises the alumina silicate rock wool, and described insulating sheath 62 is to be made by alumina silicate, and described electrical bar 32 is to be made by silicon carbide material.The inwall of described insulating lining 61 and described preceding case chute 201 are wide, and the inwall length of described insulating lining is the 50-90% of described preceding case chute 201 length.

Described chute steel covers the protective cover 63 that 60 two ends also are provided with steel, described electrical bar 32 is all overlayed in this protective cover 63 with the terminals of conductive connection 64, and conductive connection 64 comprises by aluminum braid over braid and the external wire (do not give detailed show) of iron clamp 65 double teams in electrical bar 32 terminations.

The utility model control procedure is summarized as follows:

In the production process, provide the single-phase alternating current power supply, be heater and control element power supply by N, L joint.Heater is made up of high power electrothermal device 32 and fixture thereof, under the input AC electro ultrafiltration, electric energy is converted into heat energy.The temperature value of atmosphere or aluminium liquid in the temperature detector 41 on-the-spot on-line monitorings measurement chutes is with electrical signal form transmission measurement value; Thermometer 42 is the core of electric-control system, it shows actual temperature, and with scene temperature value and set temperature value comparison, obtain temperature deviation, handle temperature deviation desired value output signal of generation through internal algorithm, the size of control signal is directly proportional with the deviation size, this signal participates in the adjusting of device voltage, and by exchanging 0～10 volt of voltage of phase shift trigger 43 outputs, or 4～20 milliamperes of current controling signals, under the triggering of this current controling signal, the AC power of 30 pairs of power supply inputs of the bidirectional triode thyristor element power supply circuits of packaging body is implemented to regulate, it is adjustable continuously to obtain voltage magnitude, the interchange output that frequency is constant, through the control of these bidirectional triode thyristor element circuitry 30 executing agencies, the alternating current of different capacity acts on the different heating effect of generation on the heater, goes to zero until temperature deviation.After temperature arrive to be set, thermometer 42 was kept a constant signal output, allows electric heater 32 be in little heated condition, offsets the loss that heat distributes, before keeping in the case chute 201 temperature of aluminum liquid reach and regulate the temperature purpose in setting value.

It is operating personnel's manual manipulation that commutation circuit 50 makes temperature control changeable, so that in particular cases trigger working signal by artificial replacement electric-control system.

Claims (10)

1. aluminium spout heater, it is characterized in that: described heater comprises the electric heater that has insulation construction, the electric heater of band insulation construction is arranged on aluminium spout top movably, and described heater also is included as the temperature detector of atmosphere temperature in the power supply circuits with controlled end, temperature controller and the detection chute of electric heater power supply or temperature of aluminum liquid, this temperature detector is connecting the inlet of temperature controller, and the outlet of temperature controller is connecting the controlled end of described power supply circuits.

2. aluminium spout heater according to claim 1, it is characterized in that: described insulation construction comprises that the chute steel with insulating lining covers, is located at the insulating sheath at chute steel lid two ends, and described electric heater is assemblied in the interior electrical bar of described chute steel lid for the insulating sheath by chute steel lid two ends.

3. as aluminium spout heater as described in the claim 2, it is characterized in that: described insulating lining comprises the alumina silicate rock wool, and described insulating sheath is to be made by alumina silicate, and described electrical bar is to be made by silicon carbide material.

4. as aluminium spout heater as described in the claim 2, it is characterized in that: described chute steel lid two ends also are provided with the protective cover of steel, and the terminals of described electrical bar and conductive connection are all overlayed in this protective cover.

5. aluminium spout heater according to claim 1 is characterized in that: the electric heater of band insulation construction covers on the chute between casting and rolling the production line filter and the lip.

6. aluminium spout heater according to claim 1 is characterized in that: the electric heater of band insulation construction covers on founding production line filter and the chute of casting between the well.

7. as aluminium spout heater as described in claim 5 or 6, it is characterized in that: the inwall of described insulating lining and described chute are wide, and the inwall length of described insulating lining is the 50-90% of described section chute length.

8. aluminium spout heater according to claim 1, it is characterized in that: described power supply circuits comprise the bidirectional triode thyristor element and connect the circuit of composition; Described temperature controller comprise set and the thermometer of displays temperature with exchange phase shift trigger, the inlet of this thermometer is connecting described temperature detector, the output of this thermometer is connecting the input that exchanges phase shift trigger, and the triggering mouth that exchanges phase shift trigger is connecting the controlled end of described bidirectional triode thyristor element power supply circuits.

9. as aluminium spout heater as described in the claim 8, it is characterized in that: described heater also comprises contacts of contactor and the corresponding contactor coil between the input that is connected in described thermometer output and exchanges phase shift trigger.

10. aluminium spout heater according to claim 1, it is characterized in that: described heater also comprises the commutation circuit of switching controls, this commutation circuit comprises contactor coil, is connected in the contacts of contactor between power supply and the described power supply circuits.

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