Method for purifying lead electrolyte by using columnar activated carbon

Abstract

The invention discloses a method for purifying a lead electrolyte by using columnar activated carbon, and relates to the technical field of purifying the lead electrolyte by using the activated carbon, in particular to the method for purifying the lead electrolyte by using the columnar activated carbon, which comprises the following steps: S1, purifying the lead electrolyte; S2, performing desorption and regeneration of the activated carbon exchange column group; and S3, neutralizing and recycling the wastewater. According to the method for purifying the lead electrolyte by using the columnaractivated carbon, the activated carbon adsorption exchange column group is adopted for purification, so that the operation is simple, other auxiliary reagents are not needed, and after the activated carbon adsorption exchange column group works for a period of time, desorption regeneration must be carried out generally for three months; substances in the to-be-separated solution can be adsorbed byusing activated carbon; calcium chloride is used as a desorbing agent for desorption and regeneration of the activated carbon; CaCl2 is selected as a desorption agent, so that the adsorption stability of activated carbon to adsorbate can be reduced, and the purpose of reducing desorption activation energy is achieved; and bismuth and antimony ions adsorbed in the activated carbon are eluted through desorption operation, and then the carbon column is washed with purified water to achieve the purpose of activated carbon regeneration.

Description

technical field [0001] The invention relates to the technical field of purifying lead electrolyte with activated carbon, in particular to a method for purifying lead electrolyte with columnar activated carbon. Background technique [0002] During the electrolytic refining of crude lead, the crude lead anode usually contains impurities such as gold, silver, copper, antimony, arsenic, tin, bismuth. , cadmium, cobalt, nickel, etc., dissolve from the anode together with lead, but generally do not precipitate at the cathode; metals with a positive potential than lead, such as antimony, bismuth, copper, gold, etc., hardly enter the electrolyte and remain in the anode slime ; In actual production, a small amount of the above-mentioned metal ions enter the electrolyte, especially bismuth, and under the action of electrophoresis, the main impurities that form electrolytic lead are precipitated at the cathode. [0003] In order to recover the lead and fluorosilicic acid in the anode ...

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Problems solved by technology

[0006] Aiming at the deficiencies in the prior art, the present invention provides a method for purifying lead electrolyte with columnar activated carbon, which solves the above-mentioned background technology and proposes that in actual production, a small amount of the above-mentioned metal ions enter the electrolyte, especially bismuth. , the problem of precipitation of the main impurities forming electrolytic lead at the cathode

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