Method and equipment for recycling high purity copper block from low copper content waste liquor

The invention relates to a method and a device of recycling high-purity copper blocks from waste liquid with low copper content. Firstly, the waste liquid with low copper content is led by a pump resisting sour corrosion from a circulating slot to an electrowinning barrel, enters the bottom of the electrowinning barrel, flows out of the upper part of the electrowinning barrel and finally flows back to the circulating slot; at the same time, a variable-frequency motor drives a cathode barrel in the electrowinning barrel to make circumferential rotating movement, the cathode barrel and the anode electrowinning barrel are switched on to a direct current of a direct current power supply, high-purity, compact and block copper is precipitated on the cathode barrel, and the copper ion concentration of electrowinning liquid decreases to below 0.5 g/L; after the electrowinning process is finished, the cathode barrel is taken out, is soaked in a warm water tank and is cleaned in cold water, and then ...