selective depression of pyrite with polyacrylamide polymers

selective depression of pyrite with polyacrylamide polymers
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  • What is pyrite depression by polysaccharides?
  • Generally, the process of pyrite depression by polysaccharides occurs due to the hydrophilic surface coating phenomenon. This procedure is different from the depression process by inorganic materials where depressants like lime and cyanide alter pyrite’s surface, preventing the collector adsorption (xanthate) .
  • Which polymers should be used for pyrite depression?
  • Therefore, using available, affordable, eco-friendly polymers to assist or replace hazardous reagents is mandatory for a green transition. Polysaccharide-based (starch, dextrin, carboxymethyl cellulose, guar gum, etc.) polymers are one of the most used biodegradable depressant groups for pyrite depression.
  • Which polysaccharides are better for pyrite synthesis?
  • Certain polysaccharides, such as starch, dextrin, and chitosan, have demonstrated better inhibitory effects and selective depression in specific binary systems involving pyrite and other minerals. Adding electrolytes, particularly calcium species, can enhance the affinity between depressants and the pyrite surface.
  • How do depression reagents interact with pyrite surface?
  • These depression reagents interact with the pyrite surface through various adsorption mechanisms, including hydrogen bonding, chemical interaction, electrochemical attraction, and hydrophobic interaction, with some cases exhibiting multi-mechanism absorption.