The influence of oxidizer hydrogen peroxide (H₂O₂) on the chalcopyrite and galena flotation separation using sodium lignosulfonate as the depressant was studied and the mechanism of H₂O₂ enhance depression action of sodium lignosulfonate was discussed in this study. The results show that both chalcopyrite and galena have good floatability when using potassium butylxanthate as a collector. The chalcopyrite and galena flotation separation can be realized by using large doses of sodium lignosulfonate. On the premise of using the oxidant H₂O₂, a small amount of sodium lignosulfonate can depress galena completely, but has a weak depression effect on chalcopyrite. Therefore, the dosage of sodium lignosulfonate can be reduced by using H₂O₂ and sodium lignosulfonate together. Sodium lignosulfonate adsorbed on galena surface principally by chemical reaction with the oxidates generated on galena and H₂O₂ promote more oxidation products on galena surface, which causes a small amount of sodium lignosulfonate to depress galena. However, the chalcopyrite has high lattice energy, which makes chalcopyrite very stable, so H₂O₂ has little effect on it. The depressant has low adsorption capacity on the surface of chalcopyrite, and the flotation separation can be realized.

研究了氧化剂过氧化氢(H ₂ O ₂ )对木质素磺酸钠浮选分离黄铜矿和方铅矿的影响，探讨了H ₂ O ₂增强木质素磺酸钠抑制作用的机理。 结果表明，以丁基黄原酸钾为捕收剂时，黄铜矿和方铅矿均具有良好的可浮性。黄铜矿和方铅矿浮选分离可以通过使用大剂量的木质素磺酸钠来实现。在使用氧化剂H ₂ O ₂的前提下，少量木质素磺酸钠可完全抑制方铅矿，但对黄铜矿有弱抑制作用。因此，通过将H ₂ O ₂和木质素磺酸钠一起使用，可以减少木质素磺酸钠的用量。吸附在方铅矿表面的木质素磺酸钠主要通过与方铅矿上产生的氧化物和H ₂ O ₂发生化学反应，促使方铅矿表面产生更多的氧化产物，从而导致少量的木质素磺酸钠抑制方铅矿。但是，黄铜矿具有很高的晶格能，这使得黄铜矿非常稳定，因此 H ₂ O ₂对其影响不大。该抑制剂在黄铜矿表面吸附能力低，可实现浮选分离。