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INVENTION
Russian Federation Patent RU2055647
APPARATUS FOR BRANCHES OF LIQUID METAL WASTE
Name of the inventor: Dyakov VE .; Koryukov YS .; Dugelny AP .; Dolbeev GV .; Brant AD
The name of the patentee: Open Joint Stock Company "Novosibirsk Tin Works"
Address for correspondence:
Starting date of the patent: 1989.11.10
The invention relates to centrifugal separation apparatus for systems for solid and liquid phases and can be used in metallurgy of nonferrous metals and chemical technology. The aim of the invention is to increase productivity. The apparatus includes a heated crucible in which it has a device for filtering. It consists of two upper and lower tapered tareli, serried large bases to form a filter gap. The apparatus has a rotation drive device for filtering and its displacement in a vertical plane, and the mechanism and uncovering tareli. The crucible bottom has a frustoconical shape and is mounted on the ring receiver of the liquid phase having a sloping bottom. It is advantageous if the cover of the crucible is formed sector plates which are pivotally mounted on the crucible and the levers have to interact with the upper tareli device for filtering.
DESCRIPTION OF THE INVENTION
The invention relates to a centrifugal apparatus intended for the separation of solid and liquid phases, and can be used in metallurgy of nonferrous metals and chemical technology.
Known vertical centrifuge for separating suspensions, comprising a heated body with the tapered surface of the rotor mounted on a shaft mounted on bearings. The rotor is provided with a slit and a liquid phase outlet discharging screw hardstock [1]
The disadvantage of this is the unreliability of the centrifuge separation of materials with a high solids content, i.e. Bulk material clearing of small amounts of a liquid phase, and separating lumpy and impossible from the liquid phase materials.
Known centrifuge comprising a conical drum filter time with holes for discharging liquid rigidly mounted on a hollow drive shaft, a cylindrical annular liquid collecting surface and the fluid outlet ring [2]
The disadvantage of this centrifuge is the low performance of liquid metals department of lump waste. This is due to oxidation of the active metal spray at high temperature, since the ejection of spray holes on the drum circumferential surface, they do not merge, not coagulate and bounce, dispersed and oxidized. Openings in the drum of the active melt clogged oxides and fine fraction. The filter openings regularly have to manually cleaned, which greatly reduces the performance. This process did not allow insecurity still use a centrifuge for processing waste.
Known and the centrifuge, which comprises a rotor consisting of two conical tareli mounted axially movable. It has insufficient capacity when filtering viscous materials [3]
The closest known to the invention is a centrifugal device for the liquid phase separation of metal waste containing filtration device consisting of two coaxial conical tareli, pressed against each other large bases to form the filtering slits, drives the rotation and vertical movement device for filtering and tareli uncovering a mechanism [4]
The disadvantage of the device is low productivity in metal separation from the lump of metal waste. This is due to the low productivity of the manual loading and unloading lump waste. In addition, due to the inefficient coagulation and draining spatter oxidized.
The aim of the invention is to increase productivity of the machine.
The drawing shows a general view of the proposed apparatus, longitudinal section.
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The device 1 comprises a circular electric resistance which is coaxial with hollow shaft 2 is mounted to filter device 3 consisting of two conical tareli 4 and 5, the compressed large bases to form the filter slit 6. Tarel upper crosspiece 5 is fixed to the axis 7 8. Lower Tarel 4 small base is rigidly connected with hollow shaft 2 which is vertically rigidly mounted to the frame 9 fixed to the bearing 10 to be movable therein vertically sliding fit. The shaft 2 is supported on a thrust bearing 11 mounted on the movable yoke 12. The yoke 12 is movable along the rails 13 by a screw mechanism 14. The axis 8 in the hollow shaft 2 is seated on a spring 15 and a rod 16. The drive shaft 17 is provided with two rotation. Thus vertical movement drive device 3 connected to the lower filtering tareli 4 and uncovering tareli mechanism with the top. Inside electric 1 set conical crucible 18 with a cone angle of inclination of the wall of 20-35. Large grounds crucible 18 is mounted on the ring receiver 19 of the liquid phase. The annular receiver 19 has an inclined bottom 20 angle of 10-20 to enter the liquid metal to the trough 21 into the mold 22. Below the annular receptacle 19 of the crucible cavity 18 communicates with a hopper 23 having an inclined tray 24 and side ventilation duct 25. The annular liquid receiver 19 phase mounted coaxially to filter device 3 and divides the latter to move the liquid metal zone and the collecting zone collecting solid residues. Conical crucible 18 may be provided with a cover formed by sector plates 26 are pivotally mounted on the crucible and having arms 27 to communicate with the upper tareli 5 and 28. The screen 18 is positioned above the crucible 29 vibrating feeder waste loading. Thrust bearing 30 serves to compress the spring 15, rod 16 and uncovering tareli 4 and 5. The upper Tarel 5 has a central opening 31 intended for loading metal scrap pieces. |
CENTRIFUGAL APPARATUS WORKS AS FOLLOWS
In the cavity of the device 3 to filter formed by the upper and lower tareli 5 tareli 4, compressed large bases, through the opening 31, is charged with 29 feeder bimetallic waste, such as steel coated with an alloy of tin, aluminum, or a printed circuit board with tin solder welds. After filling the metal waste to filter device 3 together with the hollow shaft 2 and the axis 8 is lowered to a position I (indicated by dotted lines) and is driven to rotate the drive device 17. When lowering the top filter 3 to 5 Tarel releases the levers 27 and 26 cover sector plate closes ( indicated by the dotted line). Dropping to position I and rotating for filtering warming device in the cavity of the crucible 18 heated to the melting temperature of the low-melting metal on the surface of the solid metal waste (up to 620-640 ° C). Under the influence of centrifugal forces ejected molten metal (indicated by arrow) through the gap 6 between tareli 4 and 5 on the conical wall of the crucible 18 and flows along it in a circular receiver 19 and further along the inclined bottom 20 of the latter in the trough 21 and the mold 22.
Due to the discharge of molten metal filter slit 6 onto the conical wall of the crucible 18 with a cone angle of inclination of about 20-35 spatter not discarded, and are deflected downwards along the wall, become larger in the jet and flow. At an angle of inclination of the wall of the crucible 18, at least 20 of the spray partially discarded bypass the receiver 19, are oxidized to clog the channels, leading to stop the machine. At an angle of inclination of the wall 18 of the crucible 35 on increasing the height of the liquid metal collection zone, surface runoff and thus increases the surface oxidation of the alloy.
Annular receptacle 19 due to the presence of the inclined bottom stream 20 removes metal from the hot zone of the crucible 18 into the groove 21. At an angle of inclination of the receiver local bath bottom 19 are less than about 10, leading to partial oxidized metal film. At an angle of inclination of the bottom 20 of the receiver 19, 20 of sliding down the metal torn jets, creating excessive surface oxidation.
After separation of the molten metal filtration unit 3 is lowered by means of the shaft 2 and the yoke 12 below the annular bottom 20 of the hopper receptacle 19 in the cavity 23 to position II (indicated by dashed lines). In this position the rod 16 abuts against the thrust bearing 30, the support frame and compressing the spring 15 biases the shaft 8 and an upper crosspiece 7 Tarel 5 upwards, opening the slit 6 between the large bases tareli 4 and 5 by an amount of 10-50 mm. Under the influence of centrifugal forces of rotation of solid wastes ejected from the cavity 3 to the device in the filtering chamber 23 and the hopper slide down the inclined chute 24 for unloading. The cycle is repeated.
Drive 14 traverse 12 on the guide 13 is lifted, the stock is 16 frees the thrust bearing 30. The spring 15 expands, pushing the ground rod 16, and moves down the axis 8, so that the compressed base tareli 4 and 5. Next, the shaft 2 moves together with both tareli to position when the upper Tarel 5 pushes the levers 27 and opens the pie plate cover 26 to load the next batch of waste. Cover the crucible 18, most openable tareli device for filtering at boot time, the temperature stabilizes and protects spray from oxidation. crucible cover 18 straddles annular screen 28 ventilation extraction. By unloading chute 24 hot solids connected ventilation duct 25.
The proposed device provides separation of 75-85% tin alloy-aluminum surface of the solid lump of bimetallic alloy waste in ready without oxidation. Lump printed circuit boards are separated from the solder on the edges of the filter 90% gap is not clogged as regularly stripped ejected solid.
CLAIM
1. THE APPARATUS FOR separation of the liquid phase from the waste metal, comprising a heated crucible located therein filtration device consisting of two cone-shaped tareli mounted one above the other to form the filter slot and facing each other large bases, drives the rotation and movement in the vertical plane device for filtering mechanism uncovering tareli, characterized in that, in order to increase productivity, it is provided with an annular receiver liquid phase having an inclined bottom, the top tareli provided with a central opening for loading metal waste pieces, and the crucible bottom part has frustoconical annular and mounted on the large base receiver, wherein the vertical movement drive device for filtering is connected with the bottom tareli and uncovering tareli mechanism - to the upper.
2. Apparatus according to claim 1, characterized in that the crucible is provided with a cover formed by sector plates mounted pivotally on the crucible and having arms for interaction with the upper tareli.
print version
Publication date 20.02.2007gg
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