Study on leaching blast furnace dust with deep eutectic solvent and electrodepositing zinc

Abstract:

The choline chloride-urea deep eutectic solvent system was used to leach blast furnace dust, and then zinc was obtained by direct electrodeposition. The effects of liquid-solid ratio, leaching time, and stirring speed on the leaching rate of zinc were investigated. After the leaching experiment, the cyclic voltammetry and electrodeposition experiments were carried out, respectively. The experimental results showed that the leaching rate of zinc reaches 71% under the conditions of liquid-solid ratio of 10 mL/g, the leaching time of 30 h, the stirring speed of 300 r/min, and the temperature of 70 ℃. The cyclic voltammetry test confirmed that the reduction potential was -1.4 V. X-ray diffraction and energy spectrum analysis showed that the coating was metallic zinc with high purity. By analyzing the morphology of the coating, it was found that the zinc coating was composed of cluster grains of about 1 μm.