The invention provides an ore-dressing process for extracting
copper and silver. The ore-dressing process comprises the following steps: (A)
grinding raw ores, and grading the ground ores to obtain ore pulp; (B) carrying out rough concentration on the obtained ore pulp in the step (A) to obtain first rough concentrate and first coarse
slag; (C) carrying out concentration on the obtained first rough concentrate to obtain concentrate and first middlings;
scavenging first coarse
slag to obtain second middlings and second coarse
slag; (D)
scavenging the second coarse slag to obtain third middlings and
tailings; and (E) carrying out rough concentration on the first middlings, gradually returning the second middlings and third middllings to the previous step level by level, and finally obtaining concentrate and
tailings. The process is used for extracting
copper and silver from raw ore with high argillization rate and high
oxidation rate, ore
grinding is firstly carried out in the process for extracting the
copper and silver, the ore
grinding granularity, rough concentration and floatation agent are strictly controlled by virtue of a floatation process of rough concentration,
scavenging and concentration, so that the
recovery rate of copper and silver is relatively high. The experiment result shows that the
recovery rate of the copper and silver can reach more than 90 percent.