One-stage ultrasonic-assisted calcium chloride leaching of lead from zinc leaching residue

•A method of ultrasonic assisted one-stage extraction of lead from zinc leaching residue were studied.•The leaching lead efficiency arrived at 83.8% under the optimized one-stage ultrasonic leaching conditions.•Formation of PbCl42− in leachate may be the mechanism of ultrasonic assisted leaching Pb from residue.