Device and process for inductively suppressing acid mist from electrowinning

Abstract

The present invention discloses a device for inductively suppressing acid mist from electrowinning. The device comprises a polar plate. A first isolation net and a second isolation net are respectively provided at two sides of the polar plate. Gaps are left between the first and second isolation nets and the two sides of the polar plate respectively. A first isolation piece and a second isolation piece are respectively provided to two sides of a top of the polar plate and are respectively located above the first and second isolation nets. The present invention also discloses a process for inductively suppressing acid mist from electrowinning by using the above device. The acid mist suppressing device and process of the present invention can prevent formation of acid mist during an electrowinning process so that pollution of acid mist can be eliminated and clean production can be realized.

1 . A device for inductively suppressing acid mist from electrowinning comprising:
 a polar plate ( 1 ),   a first isolation net ( 3 ) and a second isolation net ( 4 ) being respectively provided at two sides of the polar plate ( 1 ) with gaps being provided between the first and second isolation nets ( 3 ,  4 ) and the two sides of the polar plate ( 1 ) respectively;   a first isolation piece ( 5 ) and a second isolation piece ( 6 ) being respectively provided at two sides of a top of the polar plate ( 1 ) and being respectively located above the first and second isolation nets ( 3 ,  4 ).   
     
     
         2 . The device of  claim 1 , wherein it further comprises: an acid mist frame plate group including an outer frame ( 7 ), an inner frame ( 8 ) and a diaphragm cloth ( 9 ), the diaphragm cloth ( 9 ) being embedded in the outer frame ( 7 ) via the inner frame ( 8 ); the polar plate ( 1 ), together with the first and second isolation nets ( 3 ,  4 ) and the first and second isolation pieces ( 5 ,  6 ), being inserted into the inner frame ( 8 ); and the first and second isolation pieces ( 5 ,  6 ) being connected to the diaphragm cloth ( 9 ) respectively. 
     
     
         3 . The device of  claim 1 , wherein the first isolation net ( 3 ) and the polar plate ( 1 ) are connected by a first insulating connecting member ( 10 ), and the second isolation net ( 4 ) and the polar plate ( 1 ) are connected by a second insulating connecting member ( 11 ). 
     
     
         4 . The device of  claim 1 , wherein the first and second isolation pieces ( 5 ,  6 ) are respectively connected to the two sides of the top of the polar plate ( 1 ) by a fixing assembly. 
     
     
         5 . The device of  claim 4 , wherein the fixing assembly comprises a buckle ( 12 ), a first insulating loop bar ( 13 ) and a second insulating loop bar ( 14 ), the first and second insulating loop bars ( 13 ,  14 ) extending at two sides of the buckle ( 12 ) respectively;
 the first isolation piece ( 5 ) being clipped between the first insulating loop bar ( 13 ) and a side of the polar plate ( 1 ) and the second isolation piece ( 6 ) being clipped between the second insulating loop bar ( 14 ) and another side of the polar plate ( 1 ).   
     
     
         6 . The device of  claim 5 , wherein the first insulating loop bar ( 13 ) and/or the second insulating loop bar ( 14 ) is/are sleeved by a loop bar fixing sleeve ( 15 ). 
     
     
         7 . The device of  claim 2 , wherein both ends of a top of the outer frame ( 7 ) are connected to a conductive bar ( 1 . 1 ) at the top of the polar plate ( 1 ) by a hanging buckle ( 2 ). 
     
     
         8 . The device of  claim 7 , wherein the hanging buckle ( 2 ) comprises a hanging member ( 2 . 1 ) with a triangular section, a first buckle plate ( 2 . 2 ) and a second buckle plate ( 2 . 3 ) at two sides of a bottom of the hanging member ( 2 . 1 ) respectively, inner sides of the first buckle plate ( 2 . 2 ) and the second buckle plate ( 2 . 3 ) being provided with a fastener ( 2 . 4 ) respectively; the fastener ( 2 . 4 ) cooperating with a fastener installation hole ( 7 . 1 ) at the top of the outer frame ( 7 ); and the conductive bar ( 1 . 1 ) of the polar plate ( 1 ) being inserted in a hollow chamber of the hanging member ( 2 . 1 ). 
     
     
         9 . A process for inductively suppressing acid mist from electrowinning by using the device according to  claim 1 , comprising steps of:
 providing the first and second isolation nets at two sides of an anode plate respectively and leaving gaps between the first and second isolation nets and the two sides of the anode plate respectively;   connecting the first isolation net to a side of the anode plate by the first insulating connecting member and connecting the second isolation net to another side of the anode plate by the second insulating connecting member;   providing the first and second isolation pieces at two sides of the top of the anode plate respectively such that the first and second isolation pieces are respectively located above the first and second isolation nets, thereby forming the device for inductively suppressing acid mist from electrowinning;   arranging the device for inductively suppressing acid mist from electrowinning and a cathode plate in an electrowinning cell with a spacing therebetween, the spacing between adjacent the devices for inductively suppressing acid mist from electrowinning being 50-150 mm; and   after arranging the device for inductively suppressing acid mist from electrowinning and the cathode plate in the electrowinning cell, bubbles being generated from the anode plate and flowing in a bottom-to-top direction between the first and second isolation nets; when the bubbles reach a liquid surface of an electrowinning liquid, acid mist in the bubbles being blocked by the first and second isolation pieces while gas in the bubbles overflowing through the first and second isolation pieces.   
     
     
         10 . The process of  claim 9 , wherein after providing the first and second isolation pieces at two sides of the top of the anode plate respectively such that the first and second isolation pieces are respectively located above the first and second isolation nets, the process further comprises steps of:
 selecting the diaphragm cloth, the inner frame and the outer frame as required, and embedding the selected diaphragm cloth into the outer frame via the inner frame;   inserting the anode plate, together with the first and second isolation nets and the first and second isolation pieces, into the inner frame, and connecting the first and second isolation pieces to the diaphragm cloth; and   the gap between the first isolation net and a side of the anode plate is 2-50 mm, and the gap between the second isolation net and another side of the anode plate is 2-50 mm.