Efficient dehydrogenation purification device for aluminum alloy melt

Abstract

An efficient hydrogen removal and purification device for aluminum alloy melts is characterized in that an outlet of a smelting furnace is connected with an inlet of a heat preservation furnace, an outlet of the heat preservation furnace is connected with an inlet of a purification box, an outlet of the purification box is connected with an inlet of a filter box, a plurality of air outlet rotors are arranged in the purification box, and air is supplied to the air outlet rotors through an air supply station; a groove in the center of the lower end face of the exhaust disc is an air outlet, and a plurality of exhaust grooves are radially formed around the air outlet. The hydrogen removal and purification device has the advantages that the hydrogen removal and purification effects are high, and the utilization rate of purified mixed gas is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of aluminium alloy smelting, in particular to an aluminium alloy melt efficient hydrogen removal and purification device. BACKGROUND

[0002] In the aluminium alloy smelting process, the melt will produce oxide inclusions in the smelting furnace, and hydrogen will be dissolved, forming the main impurities of the aluminium alloy melt, and the inclusions and hydrogen will have an adverse effect on the internal quality of the final aluminium alloy product. Therefore, in the purification process after smelting, the inclusions and hydrogen need to be removed. The usual method for removing impurities is to pass a mixed gas of chlorine and argon into the melt, and the mixed gas will absorb the inclusions and hydrogen during the floating process on the melt and be carried out to the surface of the liquid to be discharged, thereby achieving the effect of purifying the melt. The mixed gas is passed into a rotating rotor, and the rotor has exhaust holes around it, which uniformly discharge the mixed gas to the four corners, so as to achieve the effect of diffusing a large number of bubbles in the melt and accelerating the purification process. However, the existing purification device still has room for improvement in terms of purification efficiency and utilization rate of the mixed gas. SUMMARY

[0003] The utility model aims at providing an aluminium alloy melt efficient hydrogen removal and purification device, which has the advantages of high efficiency in hydrogen removal and purification and high efficiency in utilization rate of the purification mixed gas.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0005] An aluminium alloy melt efficient hydrogen removal and purification device, the outlet of the smelting furnace is connected to the inlet of the holding furnace, the outlet of the holding furnace is connected to the inlet of the purification box, the outlet of the purification box is connected to the inlet of the filter box, a plurality of gas outlet rotors are arranged in the purification box, the gas outlet rotors are supplied with gas by a gas supply station, the gas outlet rotors comprise gas inlet pipes, the lower ends of the gas inlet pipes are connected to exhaust discs, the central recesses of the lower end faces of the exhaust discs are exhaust holes, and a plurality of exhaust grooves are radially arranged around the exhaust holes.

[0006] The aluminium ingot is melted in the smelting furnace, other alloying components are added and stirred, and then the slag is removed, the aluminium liquid is passed into the holding furnace for heat preservation and storage, the aluminium liquid in the holding furnace is successively passed into the purification box for purification, the gas supply station passes the mixed chlorine and argon gas into the gas outlet rotors, the exhaust discs of the gas outlet rotors discharge the mixed gas in the aluminium liquid in the purification box, the bubbles of the mixed gas absorb the inclusions of oxide and hydrogen in the aluminium liquid, and carry them out of the aluminium liquid to the liquid surface to be cleaned.

[0007] The exhaust grooves are Y-shaped in shape and radially outwardly branched.

[0008] The uniform dispersion degree of the bubbles of the rotor exhaust, the bubble size, and the floating speed of the bubbles in the aluminum liquid all have an important influence on the effect of bubble adsorbing impurities, and the dispersion degree and the fine degree of the bubbles formed by the structure of the exhaust slot of the traditional exhaust rotor are not satisfactory. The Y-shaped exhaust slot can split the originally larger bubbles to form smaller bubbles, and the smaller bubbles mean a larger bubble surface area and a greater adsorption capacity of impurities, so that the purification capacity of the purification tank is improved without increasing the air supply.

[0009] The exhaust disc is provided with a plurality of convex edges around the periphery, and the outlet position of the exhaust slot is arranged at the concave position between the convex edges. In the rotating condition, the convex edges hit the bubbles discharged from the exhaust slot, so that the bubbles are fully dispersed in the aluminum liquid, and the bubbles are also broken into smaller bubbles and dissipated. Therefore, the effect is better than that of simply increasing the rotor speed, and the aluminum liquid melt is also prevented from being stirred and absorbing air due to the excessively high rotor speed.

[0010] Two-stage filtering is arranged in the filter tank, a first filter plate is arranged below the first filtering chamber, and a second filter plate is arranged below the second filtering chamber. The first filter plate is a 30ppi foam ceramic filter plate, and the second filter plate is a 50ppi foam ceramic filter plate. The tank body is built by refractory bricks.

[0011] Advantages of the utility model

[0012] 1. The utility model adopts the shunt type rotor exhaust slot design, and the purification capacity of the inert gas in the purification tank is maximally improved without increasing the air supply of the air supply station and the rotor speed, smaller bubbles are formed, the dissipation capacity of the bubbles is improved, and the adsorption capacity of the bubbles is improved.

[0013] 2. The utility model adopts the double-stage filter tank design, so that the aluminum liquid filtering is more thorough, and the phenomenon that the filtering quality is affected due to the damage of the filter plate or the aluminum liquid filtering flow is not smooth due to the blockage of the filter plate is also prevented. DRAWINGS

[0014] Figure 1 It is a whole structure schematic view of the utility model;

[0015] Figure 2 It is a vertical surface structure schematic view of the air outlet rotor;

[0016] Figure 3 It is a bottom surface structure schematic view of the air outlet rotor;

[0017] Figure 4 It is a filter tank cross section structure schematic view;

[0018] The serial number and component name in the figure are: 1-melting furnace; 2- holding furnace; 3- gas supply station, 4- purification box; 41- gas outlet rotor, 411- gas inlet pipe; 412- convex edge; 413- gas outlet hole; 414- exhaust groove; 5- filter box, 51- box cover; 52- first filter plate; 53- second filter plate. DETAILED DESCRIPTION

[0019] Example 1

[0020] An efficient hydrogen removal and purification device for aluminum alloy melt, the outlet of the melting furnace 1 is connected to the inlet of the holding furnace 2, the outlet of the holding furnace 2 is connected to the inlet of the purification box 4, the outlet of the purification box 4 is connected to the inlet of the filter box 5, a plurality of gas outlet rotors 41 are arranged in the purification box 4, the gas outlet rotors 41 are supplied with gas by the gas supply station 3, the gas outlet rotors 41 include gas inlet pipes 411, the lower ends of the gas inlet pipes 411 are connected to exhaust discs, the center of the lower end surface of the exhaust disc is recessed to form a gas outlet hole 413, a plurality of exhaust grooves 414 are radially arranged around the gas outlet hole 413.

[0021] The exhaust grooves 414 are Y-shaped in shape and split radially outward.

[0022] A plurality of convex edges 412 are arranged around the exhaust disc, and the outlet positions of the exhaust grooves 414 are arranged at the recessed positions between the convex edges 412.

[0023] Two levels of filtration are arranged in the filter box 5, a first filter plate 52 is arranged below the first filtration chamber, and a second filter plate 53 is arranged below the second filtration chamber.

Claims

1. A high-efficiency hydrogen removal purifying device for aluminum alloy melt, the outlet of a smelting furnace (1) is connected to the inlet of a holding furnace (2), the outlet of the holding furnace (2) is connected to the inlet of a purifying box (4), the outlet of the purifying box (4) is connected to the inlet of a filtering box (5), a plurality of gas outlet rotors (41) are arranged in the purifying box (4), and the gas outlet rotors (41) are supplied with gas by a gas supply station (3), characterized in that: The air outlet rotor (41) comprises an air inlet pipe (411), the lower end of the air inlet pipe (411) is connected with an air exhaust disc, the central part of the lower end surface of the air exhaust disc is recessed to form an air outlet hole (413), and a plurality of air exhaust grooves (414) are radially arranged around the air outlet hole (413). ​ 2. The apparatus for high efficiency removal of hydrogen from an aluminum alloy melt according to claim 1, wherein The air exhaust grooves (414) are Y-shaped in shape and are radially outwardly branched.

3. The apparatus for high efficiency removal of hydrogen from an aluminum alloy melt according to claim 2, wherein A plurality of convex edges (412) are arranged around the air exhaust disc, and the outlet positions of the air exhaust grooves (414) are arranged at the recessed positions between the convex edges (412).

4. The apparatus for high efficiency removal of hydrogen from aluminum alloy melt according to claim 1, wherein Two-stage filtration is arranged in the filter box (5), a first filter plate (52) is arranged below the first filter chamber, and a second filter plate (53) is arranged below the second filter chamber.

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