Effect of sodium salt of N,N-dimethyldi-thiocarbamate on the flotation separation of marmatite from galena
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School of Minerals Processing and Bioengineering, Central South University, Changsha Hunan 410083, China
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Yanfang Cui   

central south university, central south university, 410083 Hunan, China
Physicochem. Probl. Miner. Process. 2019;55(2):389-399
An organic reagent, sodium salt of N,N-dimethyldi-thiocarbamate (DMDC) was investigated as a depressant for the separation of lead activated marmatite from galena in the presence of diethyldithiocarbamate (DDTC). The flotation tests of single mineral showed that lead-activated marmatite could be depressed efficiently using DMDC as the depressant. UV–vis spectroscopy and ICP study confirmed that DMDC had a stronger capacity of complexing with lead ions or hydroxy complexes of lead. FTIR and adsorption measurement showed that the adsorption of DMDC on galena and marmatite was chemisorption. In addition, after pre-treated with DMDC, DDTC could co-adsorb on the galena surface, however, less DDTC species adsorbed on the marmatite surfaces.
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