CN101338369B

CN101338369B - High-efficiency and energy-conserving on-line degassing device

Info

Publication number: CN101338369B
Application number: CN200710121125XA
Authority: CN
Inventors: 李宸; 纪军
Original assignee: BEIJING YUANWANG GAOQIAO MAGNETIC ENERGY TECHNOLOGY Co Ltd
Current assignee: BEIJING YUANWANG GAOQIAO MAGNETIC ENERGY TECHNOLOGY Co Ltd
Priority date: 2007-08-30
Filing date: 2007-08-30
Publication date: 2010-08-18
Anticipated expiration: 2027-08-30
Also published as: CN101338369A

Abstract

The invention relates to an effective energy-saving online degassing unit, which consists of a processing box, a constant-speed permanent rotating magnet with controllable magnetic field intensity, a ventilating brick, an intelligent air supply system and an aluminum liquor heat-preservation heating device; the processing box is provided with a plurality of gerade even inner cavities; the middle of each inner cavity is spaced by a clapboard and the bottom parts of each inner cavity are communicated; the bottom part of one inner cavity is provided with the ventilating brick and the intelligent air supply system; the upper surface of the cavity is provided with a processing box cover; the side surface of the cavity is provided with an aluminum liquor inlet; the bottom part of another inner cavity is provided with the constant-speed permanent rotating magnet with controllable magnetic field intensity; the upper surface of the cavity is provided with the processing box cover; the U-shaped silicon-carbon stick of an immersion heater is adopted by the heat-preservation heating device; a cylindrical carborundum or silicon nitride protection tube is arranged outside the silicon-carbon stick; the side surface of the cavity is a liquid outlet. The effective energy-saving online degassing unit of the invention has the beneficial effects of having an excellent slag-removing and degassing effect, saving cost, improving the purify of the aluminum liquor, reducing the loss, increasing the supply amount of inert gases, quickening the purifying speed of the aluminum liquor, being safe and applicable and having high automatization.

Description

A kind of efficient, energy-conserving on-line degassing device

Technical field

The present invention relates to the purifying processing device of aluminium liquid, relate in particular to a kind of efficient, energy-conserving on-line degassing device.

Background technology

Because aluminium alloy exists hydrogen, Al after refining ₂O ₃Objectionable impuritiess such as inclusion, defective such as easily form pore in foundry goods, loosen, be mingled with directly influences physicals, mechanical property and the use properties of aluminium casting, therefore must manage to remove these objectionable impuritiess before casting.Aluminium melt purifying treatment technology commonly used at present has rotary blowing degassing and purifying method and gas permeable brick degassing and purifying method.

Rotary blowing degassing and purifying method is the rare gas element chopping that will be blown into aluminium alloy melt in the degassing processing case by the graphite rotator of rotation, form a large amount of disperse bubbles, aluminum alloy melt is fully contacted in treating pond with nitrogen, bubble absorbs the hydrogen in the melt, and the surface that rises to melt after the oxide slag inclusion forms scum silica frost, thereby reaches the purpose of purifying aluminum alloy liquid.The main drawback of this method is that graphite rotator is changed frequently, and investment is big; The composition of aluminium liquid is polluted, and surface film oxide is destroyed, has increased the oxidation slagging scorification of aluminium liquid; The airing system air demand is limited, and degassing effect remains further to be improved.

Gas permeable brick degassing and purifying method is pressed into rare gas element from degassing processing case bottom exactly, forms very little bubble by gas permeable brick and enters in the molten aluminium alloy, and the method for utilizing bubble to absorb hydrogen and oxide inclusion in floating-upward process purifies.But because aluminium liquid is immobilized, rare gas element can not with aluminium liquid thorough mixing, skewness in aluminium liquid, so degassing effect is undesirable.

Chinese patent application number stirs online a refining unit for disclosing a kind of permanent magnetism in the application documents of ZL 200620050898.4, though this device can carry out purifying treatment to aluminium liquid, but have the following disadvantages: 1, design is unreasonable, gas permeable brick places the permanent magnetic stirrer top, because the thickness of gas permeable brick own is big, add annexes such as required air-supply duct and will increase the thickness of furnace wall greatly, want to make aluminium liquid to stir, more powerful permanent magnetic stirrer must be used, cost will be increased greatly like this; 2, the eddy current that in rotary course, produces of permanent magnetic stirrer, damage pipeline that will be serious causes line clogging, and air feed has some setbacks, and accident is frequent.

Summary of the invention

The purpose of this invention is to provide a kind of efficient, energy-conserving on-line degassing device, the deficiency relatively poor with the slagging-off degassing effect that overcomes prior art, that input cost is high, the eddy current that produces easily causes the steam line accident.

The objective of the invention is to be achieved through the following technical solutions:

A kind of efficient, energy-conserving on-line degassing device, mainly form by controlled permanent magnetism rotator, gas permeable brick and the intelligent airing system of processing tank, magneticstrength and the heat insulation and heating equipment of aluminium liquid, processing tank is provided with the even number inner chamber, the centre separates with dividing plate, each intracavity bottom is communicated with, for example described processing tank also can be provided with two inner chambers, and each intracavity bottom is communicated with; An intracavity bottom is equipped with gas permeable brick and intelligent airing system, and intelligent airing system connects gas permeable brick, and institute's supplied gas is used for feeding rare gas element to aluminium liquid by gas permeable brick access arrangement inside; The processing case lid is housed above the cavity, and there is an aluminium liquid fluid inlet side; Another intracavity bottom is equipped with the controlled permanent magnetism rotator of magneticstrength, make the aluminium liquid rotation of bottom in the chamber by the permanent magnetism rotator, the permanent magnetism rotator is carried out constant speed control, aluminium liquid bottom is slowly run, and aluminium liquid surface keeps static, like this rare gas element and aluminium liquid can be fully, mix uniformly, do not make the surface slagging scorification of aluminium liquid again; Heat insulation and heating equipment adopts immersion heater U-shaped globars, and globars is provided with columniform silicon carbide or silicon nitride protective tube outward, and for the temperature that makes the exit reaches regulation numerical value, well heater U-shaped globars can adopt one group also can adopt many groups; Be provided with temperature thermocouple in protective tube, can realize that temperature controls automatically, the side of cavity is a liquid outlet.

Aluminium liquid in the chute at first flows into right cavity through fluid inlet, then Di Bu intelligent airing system is opened automatically, highly purified rare gas element enters gas permeable brick through steam line simultaneously, some micropores by gas permeable brick form the bubble that diameters are about 0.01mm and enter in the aluminium liquid, aluminium liquid enters left cavity, the controlled permanent magnetism rotator that starts left chamber outer wall below simultaneously makes the rotation of aluminium liquid, and the aluminium liquid of rotation makes the rare gas element bubble that enters distribute more even; Adopt the heating of immersion heater U-shaped globars in the cavity of a processing tank left side, aluminium liquid enters liquid filling machine and casts after liquid outlet flows out.

Beneficial effect efficient, energy-conserving on-line degassing device of the present invention is: the slagging-off degassing effect is good, and the hydrogen content of aluminium liquid is dropped to below 0.045%; Owing to adopt the controlled permanent magnetism rotator of magneticstrength to carry out contactless stirring, saved the consumption of graphite rotator, saved cost, improved aluminium liquid purity; Aluminium liquid surface keeps static in scavenging process, and the oxide film of aluminium liquid does not have destroyed, thereby has reduced the slagging scorification of aluminium liquid, has reduced loss; Adopt intelligent airing system, increased the supply of rare gas element, refinement enter the bubble diameter of aluminium liquid, accelerated the purification speed of aluminium liquid, shortened the soaking time of aluminium liquid, saved energy consumption, required energy consumption only is below 50% of common gas permeable brick degasifying device; Device structure is simple, safe and applicable, level of automation height.

Description of drawings

With reference to the accompanying drawings the present invention is described in further detail below.

Fig. 1 is that the embodiment of the invention is described efficiently, the external structure synoptic diagram of energy-conserving on-line degassing device;

Fig. 2 is two-chamber and four chamber schematic top plan view;

Fig. 3 is a rare gas element supply air line synoptic diagram;

Fig. 4 is the A-A direction sectional view of Fig. 2.

Among the figure: 1, handle case lid; 2, heater protective apparatus; 3, heating U-shaped globars; 4, thermopair; 5, dividing plate; 6, bell fixed link; 7, flange; 8, fluid inlet; 9, body fixed link; 10, insulating brick; 11, ceramic beaverboard; 12, gas permeable brick; 13, intelligent airing system: 13-1 wherein is a manual ball valve, 13-2 strainer, 13-3 pressure regulator valve, 13-4 pressure switch, 13-5 tensimeter, 13-6 electromagnetic shut-off valve, 13-7 needle-valve, 13-8 vacuum breaker, 13-9 air collector, 13-10 under meter; The permanent magnetism rotator that 14 magneticstrengties are controlled; 15, liquid outlet.

Embodiment

As shown in figs. 1 and 4, the embodiment of the invention is described efficient, energy-conserving on-line degassing device, mainly by processing tank, the permanent magnetism rotator 14 that magneticstrength is controlled, the heat insulation and heating equipment of gas permeable brick 12 and intelligent airing system 13 and aluminium liquid is formed, processing tank is divided into a left side, right two inner chambers, a left side, separate by dividing plate 5 in the middle of right two inner chambers, each intracavity bottom is communicated with, each inner chamber top is provided with handles case lid 1, handle case lid 1 by bell fixed link 6 fixedly on the processing tank, on top, side, right chamber fluid inlet 8 is arranged, bottom, side, right chamber is provided with body fixed link 9, insulating brick 10, ceramic beaverboard 11, gas permeable brick 12 is equipped with in bottom, right chamber, and gas permeable brick 12 bottoms are connected with intelligent airing system 13; Heat insulation and heating equipment comprises immersion heater U-shaped globars 3, heater protective apparatus 2 and the thermopair 4 that is equipped with on the left chamber processing case lid 1, and top, side, left chamber is provided with liquid outlet 15, and the controlled permanent magnetism rotator 14 of magneticstrength is equipped with in below, bottom, left chamber; The two sides of cavity respectively are provided with flange 7.

As shown in Figure 2, processing tank is provided with left and right two inner chambers, separates and two intracavity bottoms connections with dividing plate in the middle of described left and right two inner chambers, and described processing tank also can be set to a plurality of cavitys.

As shown in Figure 3, the intelligent airing system 13 of the present invention is made up of manual ball valve 13-1, strainer 13-2, pressure regulator valve 13-3, pressure switch 13-4, tensimeter 13-5, electromagnetic shut-off valve 13-6, needle-valve 13-7, vacuum breaker 13-8, air collector 13-9 and under meter 13-10, the rare gas element of control enters air collector 13-9 through manual ball valve 13-1, strainer 13-2, pressure regulator valve 13-3, electromagnetic shut-off valve 13-6, enters gas permeable brick 12 by air collector 13-9 by the pipeline that under meter 13-10 is housed then.

As shown in Figure 4, the present invention in use, the aluminium liquid in the chute flows into the right chamber and the left chamber of processing tank successively through fluid inlet, flows out through liquid outlet 15 at last, enters casting machine again and casts.The multi-cavity processing tank can corresponding many casting machines, when aluminium liquid enters the right chamber of handling casing, the intelligent airing system of bottom is opened automatically, highly purified rare gas element is through air-supply duct, regulated valve enters gas permeable brick, micropore by gas permeable brick forms the bubble that diameter is about 0.01mm and enters in the aluminium liquid, the controlled permanent magnetism rotator of magneticstrength that starts bottom, left chamber simultaneously makes the rotation of aluminium liquid, the aluminium liquid of rotation makes the rare gas element bubble that enters distribute more even, bubble in uphill process with the hydrogen in the aluminium liquid, the oxide compound slag inclusion is taken liquid level out of, in the left chamber of processing tank, adopt the heating of immersion heater U-shaped globars, to guarantee the temperature of aluminium liquid.This installs non-stop run, thereby reaches the effect of slagging-off, degasification.

Claims

1. efficient, energy-conserving on-line degassing device, mainly form by controlled permanent magnetism rotator, gas permeable brick and the intelligent airing system of processing tank, magneticstrength and the heat insulation and heating equipment of aluminium liquid, it is characterized in that: described processing tank is provided with left and right two inner chambers, separates and two intracavity bottoms connections with dividing plate in the middle of described left and right two inner chambers; An intracavity bottom is equipped with gas permeable brick and intelligent airing system and intelligent airing system and connects gas permeable brick, and institute's supplied gas is by gas permeable brick access arrangement inside; The processing case lid is housed above the cavity, and the cavity side is provided with aluminium liquid fluid inlet; Another intracavity bottom is equipped with the controlled permanent magnetism rotator of magneticstrength; the processing case lid is housed above the cavity; heat insulation and heating equipment adopts immersion heater U-shaped globars, and described globars is provided with columniform silicon carbide or silicon nitride protective tube outward, and the side of cavity is a liquid outlet.

2. efficient, energy-conserving on-line degassing device according to claim 1 is characterized in that: described immersion heater U-shaped globars is one or more groups.

3. efficient, energy-conserving on-line degassing device according to claim 1 and 2 is characterized in that: be provided with temperature thermocouple in the described protective tube.