The invention relates to a waste-free environment-friendly
recovery method for
copper-containing difficult-to-treat materials, which comprises the following steps of: crushing the materials,
grinding into ore pulp, and filtering to obtain ore
grinding filter residues and ore
grinding filtrate; carrying out low-acid iron leaching on the ore grinding filter residues, filtering to obtain low-acid leaching filter residues and low-acid leaching filtrate, recycling the ore grinding filtrate, neutralizing to be neutral by using acid waste liquid when the alkali concentration and impurities rise, and filtering to return to ore grinding for use; carrying out oxidation iron
precipitation on the low-leaching filtrate, neutralizing until the pH value is 3-5, blowing
compressed air at the temperature of 80-85 DEG C to oxidize low-valent iron ions so as to form iron colloidal precipitate, filtering to obtain neutralized purified liquid and neutralized iron
precipitation slag, returning the neutralized purified liquid to low-acid iron leaching operation, and returning the neutralized iron
precipitation slag to
lead smelting and slagging; carrying out high-temperature high-acid
oxygen pressure leaching on the low-leaching filter residues, and filtering to obtain high-leaching filtrate and high-leaching filter residues; cooling and saturating the high-leaching filtrate to separate out a
copper sulfate crystal product, and feeding high-leaching filter residues to lead for
smelting to recover lead and silver. The method is easy to operate, treats waste with waste, is low in cost, and efficiently recycles valuable
metal in an environment-friendly manner without three wastes.