A kind of process method that is conducive to improving the recovery rate of lead and silver in lead concentrate

Abstract

The invention discloses a process method for improving the recovery rate of lead and silver in lead concentrate, which comprises the following steps: concentrating and dehydrating the graded overflow product of raw ore, adjusting the pH value of pulp after dehydration, adding inhibitors to the pulp, trapping Collecting agent and foaming agent; the pulp is subjected to lead roughing, the foamed product of lead roughing is selected for three times to obtain silver-containing lead concentrate, and the tailings of lead roughing are cleaned four times to obtain lead tailings; lead The tailings product of selection 1 and the foam product of lead scavenging and dressing 2 are combined into one to form the lead mineral product, regrind and classify the overflow product, and classify the regrind and classified overflow product with the raw ore. The overflow product is concentrated together. The overall flotation environment of the present invention adopts the concentration of raw ore and the regrinding of intermediate products, classification, overflow and concentration. By continuously maintaining the condition of high concentration ore pulp in the flotation process, the flotation time can be prolonged, and the part of lead and silver minerals with slow flotation speed can be solved. increase the overall recovery of lead and silver.

Description

technical field [0001] The invention relates to a beneficiation method, in particular to a process method for improving the recovery rate of lead and silver in lead concentrate. Background technique [0002] At present, there are many sulfide minerals in domestic lead-zinc ores, which are often accompanied by various elements such as gold, silver, copper and iron. Common beneficiation processes are: [0003] After the raw ore is graded by ball mill grinding (-200 mesh content 60% to 80%), the general flotation process is carried out to directly produce lead concentrate. The main grade of lead concentrate is generally based on the grade of the raw ore and the flow structure. Controlling it at 45% to 65% is very difficult to improve the recovery rate of lead and silver with fine embedded particle size, complex composition, many replacement packages, and slow flotation speed, resulting in serious waste of resources. SUMMARY OF THE INVENTION [0004] The technical problem to...

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Problems solved by technology

[0004] The technical problem to be solved by this invention is to provide a kind of processing method that is conducive to improving the recovery rate of lead and silver in the lead concentrate for the above-mentioned deficiencies in the prior art. To solve the problem of low recovery rate of lead and silver flotation, the overall flotation environment adopts raw ore concentration and intermediate product regrinding, classification, overflow and concentration, and by continuously maintaining the condition of high-concentration pulp in the flotation process, the flotation time can be extended and the flotation solution can be solved. The slower part of the lead and silver minerals float up, thus improving the overall recovery of lead and silver

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