A kind of method for adding low selenium composite additive electrolytic manganese
A composite additive, electrolytic manganese technology, applied in the field of electrolytic manganese, to achieve the effects of easy maintenance, good current efficiency, and environmental protection
Active Publication Date: 2018-11-06
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the above-mentioned shortcoming of using single selenium dioxide and sulfur dioxide as electrolytic manganese solution additives, and to provide a method for adding low-selenium composite additive electrolytic manganese
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0011] (1) The cathode uses a stainless steel electrode, which is sanded, polished, and washed with water, dried at 80 °C for 40 minutes, soaked in 0.5% sodium silicate solution for 10 minutes, washed with water, and dried at 80 °C for 40 minutes. Get a spare cathode.
[0012] (2) prepare 1 L mixed solution, this mixed solution contains 18g / L manganese sulfate and 110 g / L ammonium sulfate, then add the compound additive of selenium dioxide and zinc oxide, make the concentration of selenium dioxide be 5 mg / L, The concentration of zinc oxide was 0.6 mg / L, the pH value of the mixed solution was adjusted to 7, and then the mixed solution was stirred at 40° C. for 1 hour to prepare an electrolyte solution for use.
[0013] (3) Put the electrolyte prepared in step (2) into a 40°C constant temperature water bath, insert the spare cathode treated in step (1), use a titanium plate as the anode, and then start constant temperature and constant current electrolysis, the electrolysis curr...
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Abstract
The invention discloses a method for preparing electrolytic manganese by adding a low-selenium composite additive. The method comprises steps as follows: a stainless steel electrode is taken, subjected to sand papering, polishing, washing and drying, soaked in a sodium silicate solution with the concentration of 0.5% for 10-20 min, washed and dried, and a standby cathode is prepared; 1 L of a mixed solution is prepared and contains manganese sulfate and ammonium sulfate, a pH value of the mixed solution is regulated to 7 by adding the composite additivecontainingselenium dioxide and zinc oxide, then the mixed solution is stirred for 0.5-2 h at the temperature of 40 DEG C, and an electrolyte solution is prepared for standby application; the electrolyte solution is put in a thermostatic water bath kettle at the temperature of 40 DEG C, the standby cathode is inserted into the thermostatic water bath kettle, an anode adopts a titanium plate, constant-temperature and constant-current electrolysis is performed, electrolytic current density is 350-450 A / m<2>, electrolytic voltage is 5-7 V, and electrolytic manganese is obtained after electrolysis is performed for 4 h. The method is simple to operate, the utilizedelectrolyte solution contains simple components, maintenance is easy, the composite additive is formed by adding zinc oxide, the selenium content is lower, and a high-purity electrolytic manganese product can be obtained.
Description
technical field [0001] The invention belongs to the technical field of electrolytic manganese, and in particular relates to a method for adding a low-selenium composite additive electrolytic manganese. The method is to add compound additives containing selenium dioxide and zinc oxide to manganese sulfate electrolytic solution containing ammonium sulfate to obtain electrolytic manganese with a purity of more than 97%. Background technique [0002] At present, the electrolytic manganese industry at home and abroad mainly uses selenium dioxide and sulfur dioxide as additives for electrolytic manganese. my country's electrolytic manganese factories mainly use a single selenium dioxide as an additive for electrolytic manganese, but during the electrolytic process, selenium will be deposited into the electrolytic manganese products, which will reduce the purity of manganese metal from electrolysis and affect the quality of metal manganese, resulting in The scope of application of ...
Claims
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IPC IPC(8): C25C1/10
CPCC25C1/10
Inventor 尚伟温玉清王媛媛翁秋诗杨月坤谢博文刘鸣鸣
Owner GUILIN UNIVERSITY OF TECHNOLOGY