FI59622B - MONTERBAR DIAFRAGMARAM - Google Patents

Description

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Suomi-Finland (FI) (72) Kyösti Marila, Ulvila, Suomi-Finland (Fl) (7 * 0 Arne Therman (5 ** ·) Prefabricated diaphragm frame - Monterbar diaphragm maram

The diaphragm frame is used in the electrochemical cleaning process of metals.

The frame consists of a support part and a frame part. The frame is used so that it is part of the frame. with threaded bags is placed in an electrolysis tank containing a metal sulfate solution. Inside the frame and the bag, a so-called seed plate made of a thin metal in question is placed, which is hung from its support lugs, usually on a cathode rod made of copper. Electric current is introduced into the pool, usually through anodes made of lead. The anodes are placed in a row sitep formed by the diaphragm bags so that there is one diaphragm bag between each anode. The electric current passes through the anode to the metal sulphate solution in the pool and transports the metal particles charged from the solution to a seed plate inside the diaphragm bag, on which the metal to be processed precipitates into pure metal. An electrolyte solution, preferably at a temperature of about 60 cP, is continuously introduced into the tank. The sulfuric acid content of the solution is preferably about 10% by weight.

Due to the above-mentioned operating conditions, the diaphragm frame is exposed to various stresses, mainly - mechanical - chemical 2,59622 - electrical - thermal stresses.

The diaphragm frame normally used has the following structure:

The frame part and the support arms are shaped from a steel bar and welded into one unit. A plastic hose is threaded on top of the steel bar, which is hot-air welded into a tight sock at its joints. The function of the plastic hose is to protect the steel bar against corrosion and to act as an electrical insulator. A guide chute bent from a plastic plate is attached to the inside of the body by means of hot air welding. In practice, the frame has the following disadvantages: 1 the plastic on top of the steel bar does not withstand the interaction of the stresses, but breaks easily 2 the plastic hose breaks quickly the coated frame is heavy and causes inconvenience in handling

It follows from the above drawbacks that the frames currently in use are heavy and vulnerable and, in addition to causing a lot of repair and maintenance work, are short-lived.

The object of the invention is to eliminate the above drawbacks with a diaphragm frame for electrochemical cleaning of metal according to the invention, which is characterized by an assembling structure: - the frame and the support part are releasably fastened and rigidly attached to each other - the parts are non-corrosive and

The invention is explained mainly by means of the figures shown in the accompanying drawings.

Figure 1 shows a side view of a diaphragm frame according to the invention.

Figure 2 is a top view of a diaphragm frame according to the invention.

Fig. 3 is a sectional view of a diaphragm frame according to the invention along the line A-A in Fig. 1.

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Fig. 4 is an enlarged view of a connection method according to the invention, in which the frame (30, 31) is fastened to the supports (20, 21), along the line C-C shown in Fig. 1.

Fig. 5 is an enlarged view of the connection method shown in Fig. 4 by which the frame (30, 31) is attached to the brackets (20, 21), shown at D1-D1 in Fig. 2.

Fig. 6 is a partial enlargement of the connection method shown in Fig. 4 at point F in Fig. 2.

Fig. 8 is a partial enlargement of the method of connecting the parts of the frame (30, 31) shown in Fig. 4 along the line B-B in Fig. 1.

Fig. 9 is a partial magnification of the connection method of the frame (30, 31) and the guide chute (50) shown in Fig. 4, seen from above along the line A-A shown in Fig. 3.

Figure 10 is a side view of a diaphragm frame made according to another plant method.

Fig. 11 is a top view of a diaphragm frame according to the connection method shown in Fig. 10.

Fig. 12 is a side view of a diaphragm frame according to the connection method shown in Fig. 10.

Fig. 13 is a partial enlargement of the connection method shown in Fig. 10 taken along line C-C in Fig. 10.

Fig. 14 is a partial enlargement of the connection method shown in Fig. 10 of the part D-D shown in Fig. 11.

Figure 15 shows a top view of a rectangular diaphragm frame according to the invention.

Figure 16 is a top view of a rectangular diaphragm frame according to the invention.

Fig. 17 is a sectional view of a rectangular diaphragm frame according to the invention along the line A-A in Fig. 15.

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Fig. 18 is an enlarged view of the connection method shown in Fig. 15, in which a rectangular frame (62, 63, 64) is connected to the brackets (20, 21), along the line I-I shown in Fig. 15.

Fig. 19 is an enlarged view of the connection method shown in Fig. 15 along the line I-I shown in Fig. 15.

Fig. 20 is an enlarged view of the connection method shown in Fig. 15 by which the frame (62, 63, 64) is assembled, shown along the line J-J shown in Fig. 17.

Fig. 21 is a partial enlargement of a part F shown in Fig. 15 of a connection method of the parts of the frame (62, 63, 64) according to the invention.

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The diaphragm frame according to the invention is constructed in such a way that the lower part or frame (30,31) in the electrolysis is made of plastic, preferably PP plastic, which is characterized by good chemical resistance, good thermal properties, low absorption and good electrical insulation and sufficient mechanical strength. The support arms (20,21) at the top are made of acid-resistant steel. The frame (30, 31) is made of plastic, according to a solution according to the invention, either by joining two round but laterally machined bars, and by bending the frame into a U-shape or by molding the frame into its final shape.

In the frame structure according to Figures 15-21, the frame body consists of plastic parts (62,63,64) which are preferably rectangular or square in cross-section. Guide plates (65,66) are attached to the frame formed by the parts (62,63,64) by placing the inner sides (71,72) and guide plates of the guide plates (65,66) against the outer sides (69,70) of the frame (62,63,64). (65,66) is fixed to the frame (62,63,64) by means of screws (60,61), as shown in Fig. 20. Guide pieces (52) are connected to the inner sides (71,72) of the baffles (65,66).

A rectangular frame, especially when the edges (65,66) are mechanically removable and attached to a rigid structure, has the advantage, in addition to the rigidity of the structure, that the lower corners of the seed discs do not have to be machined as with conventional bent diaphragm frames.

In the solution shown in Fig. 4, cavities (24) are made at the upper end of the frame (30, 31) at the junction of the supports (20, 21) to stabilize the structure. The brackets (20, 21) are locked to the frame (30, 31) by a bolt (26) and a nut (27) passing through the hole (22) in the frame and the hole (25) in the frame. The bolt and nut are made of stainless steel.

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In the solution shown in Figure 10, the frame (30, 31) is connected to the brackets (20, 21) by means of a pin (40) and a bracket (41). Holes (42,43) the size of a pin (40) are drilled in the brackets (20,21) and the frame (30,31) and the pin (40) is placed in the holes (42,43). The bracket (41) is locked to the frame (30, 31) and the pin (40) with a screw (44). The pin (40), the bracket (41) and the screw (44) are made of acid-resistant metal.

Attached to the inside of the frame (30, 31) by a bolt (53) is a guide trough (50) made of plastic and bent in a U-shape in the solution shown in Fig. 4. Attached to the inner surface (51) of the guide chute (50) are guide pieces (52) which guide the cathode to the center of the chute. The guide pieces (52) are preferably made of plastic and, in the preferred solution, fastened by butt welding. Similarly, control rods (54) are attached to the lower part and the inner surface (51) of the guide trough (50).

The structure of the prefabricated diaphragm frame according to the invention can be solved in other ways as well.

Claims (2)

6 59622 PATENTTIV ΑΑΤ1Μ UK SET A diaphragm frame for use in an electrochemical cleaning process for metals, characterized in that the plastic frame (30,31) and the acid-resistant steel support part (20.21) are releasably rigidly attached to each other. Diaphragm frame according to Claim 1, characterized in that the frame (30, 31) and the support part (20, 21) are connected to one another in such a way that the support part (20, 21) is connected to the frame (30, 31) at the upper end of the frame (30, 31). supported (20.21) and a frame (30,31) through a bolt (26) supported by the recesses (24).