Study on Optimization of Tungsten Ore Flotation Wastewater Treatment by Response Surface Method (RSM)

A large amount of collectors, inhibitors and modifiers such as oleic acid, water glass sodium carbonate are added to the flotation processing tungsten ore, resulting in difficulty suspended solids (SS) with residual settling down wastewater. The removal efficiency is low commonly used reagents like polyaluminium chloride (PAC) polyacrylamide (PAM). This paper innovatively applied calcium (CaCl2) treat wastewater optimized dosage CaCl2, PAM pH value. experimental results showed that when 595 mg/L CaCl2 was combined 21 at 12, turbidity ratio could reach 99.98%, supernatant 0.23 NTU. effluent fully meet requirements for reuse industrial, urban miscellaneous scenic environment consumption (turbidity < 5 NTU). quadratic equation model fitted Design-Expert 8.0.6 software constructed Y = 91.52 + 8.68A 1.11B − 1.02C 1.7AB 0.86AC 0.06BC 1.56A2 2.09B2 1.89C2, which had a good accuracy predicted responses versus data.