Process method beneficial to improving recovery rate of lead and silver in lead concentrate

Abstract

The invention discloses a process method beneficial to improving the recovery rate of lead and silver in lead concentrate. The process method comprises the following steps that raw ore graded overflow products are concentrated and dehydrated, the pH value of ore pulp is adjusted after dehydration, and an inhibitor, a collecting agent and a foaming agent are added into the ore pulp; the ore pulp is subjected to lead roughing, foam products obtained after lead roughing are subjected to three-time concentration, silver-containing lead concentrate is obtained, tailings obtained after lead roughing are subjected to four-time scavenging, and lead tailings are obtained; adn a tailing product of lead concentration 1 and a foam product of lead scavenging 2 are combined into a whole to form a lead concentration middling product, the lead concentration middling product is subjected to regrinding, grading and overflowing, and the regrinding, grading and overflowing product and a raw ore grading and overflowing product are concentrated together. According to the method, raw ore concentration and intermediate product regrinding, grading, overflowing and concentration are adopted in the overall flotation environment, the flotation time is prolonged by continuously maintaining the condition of high-concentration ore pulp in the flotation process, the problem of floating of lead and silver minerals with the low flotation speed is solved, and therefore the overall recovery rate of lead and silver is increased.

Description

technical field [0001] The invention relates to a beneficiation method, in particular to a process method beneficial to improving the recovery rate of lead and silver in lead concentrate. Background technique [0002] At present, most of the lead-zinc mines in China are sulfide ores, often accompanied by various elements such as gold, silver, copper and iron. Common beneficiation processes are: [0003] After the raw ore is ground and classified by a ball mill (-200 mesh content 60%~80%), the general flotation process is used to directly flotation to produce lead concentrate. The main grade of the lead concentrate depends on the grade of the raw ore and the situation of the process structure. Controlled at 45%~65%, it is very difficult to improve the recovery rate of lead and silver for fine particle size embedded cloth, complex composition, more parcels, and slow flotation speed, resulting in serious waste of resources. Contents of the invention [0004] The technical p...

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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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