Lead electrolyte purification process

Abstract

An embodiment of the invention discloses a lead electrolyte purification process, and belongs to the technical field of lead electrolytic refining. According to the lead electrolyte purification process, a filter press provided with acid-proof filter cloth is used for filtering and removing impurities of an electrolyte, and after impurity metal ions of the electrolyte reach the standard, the electrolyte is electrified for normal production. An adsorbent adopted by an existing purification process is changed into the filter press provided with the acid-proof filter cloth. The filter press cooperates with a filter press pump and a circulating pump in use to filter and remove impurities from the electrolyte, so that the particulate impurities contained in the electrolyte can be effectively separated, and the lead electrolyte purification process has the advantages of good purification effect and high purification efficiency. After purification, the current efficiency is improved to 94-95%from the original 90-92%, the unit consumption of direct current is reduced to 110-130 kwh from the original 130-150 kwh, the quality of electric lead (pb) reaches 99.997% or above, and the application prospect is wide.

Description

technical field

[0001] The embodiments of the present invention relate to the technical field of lead electrolytic refining, and in particular to a process for purifying lead electrolyte. Background technique

[0002] Lead electrolytic refining is generally a process in which crude lead or semi-refined lead that has been primarily refined by fire method is electrolyzed in an aqueous solution of fluorosilicic acid and lead fluorosilicic acid, the purpose of which is to obtain high-grade lead. During lead electrolytic refining, the anode is cast from crude lead after removing copper and tin, and the cathode lead melted by electrolysis is used as the cathode, and the electrolyte is an aqueous solution of lead fluorosilicic acid and fluorosilicic acid. During electrolysis, put the cathode and anode plates into the electrolytic cell containing the electrolyte according to a certain distance between electrodes, connect the direct current, lead dissolves from the anode into the ele...

Examples

Embodiment 1

[0029] After testing, the concentration of impurity metal ions in the electrolyte to be purified: Cu=1.42mg / L, As=875mg / L, Sb=645mg / L, Bi=25mg / L, Ag=2.1g / t.

[0030] The above electrolytic solution is subjected to the following purification process: use a filter press equipped with a 600-mesh anti-fluosilicate filter cloth to filter and remove impurities. The filter area of ​​the filter press is 20m 2 , the number of matching plates is 19 pieces, the pressing pressure is 19Mpa, the back pressure is 30Mpa, and the filtration pressure is 8kg / cm 2 . The auxiliary equipment includes: three-phase motor, hydraulic station, YDS low-speed motor. In addition, a new circulating pump used in conjunction with the filter press: the flow rate is 10m 3 / h, the head is 80m, the speed is 2900r / min, and the power is 18.9KW. Auxiliary equipment: three-phase asynchronous motor 18KW.

[0031] After 8 hours, the concentration of impurity metal ions in the purified electrolyte was detected, and...

Embodiment 2

[0033] After testing, the concentration of impurity metal ions in the electrolyte to be purified: Cu=1.65mg / L, As=1050mg / L, Sb=380mg / L, Bi=7.3mg / L, Ag=4.2g / t.

[0034] The above electrolytic solution is subjected to the following purification process: use a filter press equipped with an 800-mesh anti-fluosilicate filter cloth to filter and remove impurities. The filter area of ​​the filter press is 20m 2 , the number of matching plates is 19 pieces, the pressing pressure is 19Mpa, the back pressure is 30Mpa, and the filtration pressure is 8kg / cm 2 . The auxiliary equipment includes: three-phase motor, hydraulic station, YDS low-speed motor. In addition, two new circulating pumps are added to be used with the filter press: the flow rate is 10m 3 / h, the head is 80m, the speed is 2900r / min, and the power is 18.9KW. Auxiliary equipment: three-phase asynchronous motor 18KW.

[0035] After 8 hours, the concentration of impurity metal ions in the purified electrolyte was detect...

Embodiment 3

[0037] After testing, the concentration of impurity metal ions in the electrolyte to be purified: Cu=1.60mg / L, As=680mg / L, Sb=650mg / L, Bi=36mg / L, Ag=3.1g / t.

[0038] The above electrolytic solution is subjected to the following purification process: use a filter press equipped with a 1000-mesh anti-fluosilicate filter cloth to filter and remove impurities. The filter area of ​​the filter press is 20m 2 , the number of matching plates is 19 pieces, the pressing pressure is 19Mpa, the back pressure is 30Mpa, and the filtration pressure is 8kg / cm 2 . The auxiliary equipment includes: three-phase motor, hydraulic station, YDS low-speed motor. In addition, two new circulating pumps are added to be used with the filter press: the flow rate is 10m 3 / h, the head is 80m, the speed is 2900r / min, and the power is 18.9KW. Auxiliary equipment: three-phase asynchronous motor 18KW.

[0039] After 8 hours, the concentration of impurity metal ions in the purified electrolyte was detected...

technical field

[0001] The embodiments of the present invention relate to the technical field of lead electrolytic refining, and in particular to a process for purifying lead electrolyte. Background technique

[0002] Lead electrolytic refining is generally a process in which crude lead or semi-refined lead that has been primarily refined by fire method is electrolyzed in an aqueous solution of fluorosilicic acid and lead fluorosilicic acid, the purpose of which is to obtain high-grade lead. During lead electrolytic refining, the anode is cast from crude lead after removing copper and tin, and the cathode lead melted by electrolysis is used as the cathode, and the electrolyte is an aqueous solution of lead fluorosilicic acid and fluorosilicic acid. During electrolysis, put the cathode and anode plates into the electrolytic cell containing the electrolyte according to a certain distance between electrodes, connect the direct current, lead dissolves from the anode into the ele...

Examples

Embodiment 1

[0029] After testing, the concentration of impurity metal ions in the electrolyte to be purified: Cu=1.42mg / L, As=875mg / L, Sb=645mg / L, Bi=25mg / L, Ag=2.1g / t.

[0030] The above electrolytic solution is subjected to the following purification process: use a filter press equipped with a 600-mesh anti-fluosilicate filter cloth to filter and remove impurities. The filter area of ​​the filter press is 20m 2 , the number of matching plates is 19 pieces, the pressing pressure is 19Mpa, the back pressure is 30Mpa, and the filtration pressure is 8kg / cm 2 . The auxiliary equipment includes: three-phase motor, hydraulic station, YDS low-speed motor. In addition, a new circulating pump used in conjunction with the filter press: the flow rate is 10m 3 / h, the head is 80m, the speed is 2900r / min, and the power is 18.9KW. Auxiliary equipment: three-phase asynchronous motor 18KW.

[0031] After 8 hours, the concentration of impurity metal ions in the purified electrolyte was detected, and...

Embodiment 2

[0033] After testing, the concentration of impurity metal ions in the electrolyte to be purified: Cu=1.65mg / L, As=1050mg / L, Sb=380mg / L, Bi=7.3mg / L, Ag=4.2g / t.

[0034] The above electrolytic solution is subjected to the following purification process: use a filter press equipped with an 800-mesh anti-fluosilicate filter cloth to filter and remove impurities. The filter area of ​​the filter press is 20m 2 , the number of matching plates is 19 pieces, the pressing pressure is 19Mpa, the back pressure is 30Mpa, and the filtration pressure is 8kg / cm 2 . The auxiliary equipment includes: three-phase motor, hydraulic station, YDS low-speed motor. In addition, two new circulating pumps are added to be used with the filter press: the flow rate is 10m 3 / h, the head is 80m, the speed is 2900r / min, and the power is 18.9KW. Auxiliary equipment: three-phase asynchronous motor 18KW.

[0035] After 8 hours, the concentration of impurity metal ions in the purified electrolyte was detect...

Embodiment 3

[0037] After testing, the concentration of impurity metal ions in the electrolyte to be purified: Cu=1.60mg / L, As=680mg / L, Sb=650mg / L, Bi=36mg / L, Ag=3.1g / t.

[0038] The above electrolytic solution is subjected to the following purification process: use a filter press equipped with a 1000-mesh anti-fluosilicate filter cloth to filter and remove impurities. The filter area of ​​the filter press is 20m 2 , the number of matching plates is 19 pieces, the pressing pressure is 19Mpa, the back pressure is 30Mpa, and the filtration pressure is 8kg / cm 2 . The auxiliary equipment includes: three-phase motor, hydraulic station, YDS low-speed motor. In addition, two new circulating pumps are added to be used with the filter press: the flow rate is 10m 3 / h, the head is 80m, the speed is 2900r / min, and the power is 18.9KW. Auxiliary equipment: three-phase asynchronous motor 18KW.

[0039] After 8 hours, the concentration of impurity metal ions in the purified electrolyte was detected...

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