Method of recovering lead concentrate from lead oxide ores based on electrochemical size-mixing flotation

Abstract

The invention relates to a method of recovering lead concentrate from lead oxide ores based on electrochemical size-mixing flotation and belongs to the technical field of metal mineral processing. Themethod comprises the following steps: grinding high grade lead oxide raw ores which are hard to process in a water medium with a ball mill to obtain ore pulp; introducing the ore pulp into a stirringbarrel to be stirred for size-mixing, adding sodium sulfide and butyl sodium xanthate at twice, firstly, adding sodium sulfide to stir and then adding butyl sodium xanthate and sodium sulfide to stircontinuously, and finally, adding butyl sodium xanthate and second floatation oil for air agitation; and after the ore pulp level meets the demand, carrying out flotation, and carrying out processesof roughing at one time, scavenging at two times and concentrating at one time to obtain lead concentrate. The process provided by the invention is reasonable, small in consumption of reagents and relatively low in cost, is relatively high in adaptability to high grade refractory lead oxide ores, remarkable in effect and high in recovery rate, and meets the industrial production demands.

Description

technical field [0001] The invention belongs to the technical field of metal mineral processing, and in particular relates to a method for recovering lead concentrate from lead oxide ore based on electrochemical slurry flotation. Background technique [0002] In addition to white lead ore, lead oxide ore also contains a large number of other lead oxide minerals, as well as a large number of gangue minerals (especially argillaceous minerals), which make flotation more difficult. Flotation of lead oxide ore generally adopts sulfide-xanthate flotation. Sodium sulfide and lead sulfide minerals need to be used first before flotation, and then collected with xanthate. The main function of sodium sulfide is to form a lead sulfide mineral film on the surface of lead oxide minerals, so that xanthate can be used for collection. Therefore, if the amount of sulfide agent is not enough, it is difficult to fully recover lead minerals, but if the amount of sulfide is too high, the potenti...

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Problems solved by technology

The main function of sodium sulfide is to form a lead sulfide mineral film on the surface of lead oxide minerals, so that xanthate can be used for collection. Therefore, if the amount of sulfide agent is not enough, it is difficult to fully recover lead minerals, but if the amount of sulfide is too high, the potential of the slurry will be too low. The lead minerals that have been sulfided have an inhibitory effect, and problems such as poor foam mineralization and slow flotation speed occur, resulting in low lead flotation recovery rate

In view of the above problems, the general treatment method is to increase the amount of collector and foaming agent to forcibly float lead minerals. However, due to the excessive amount of collector and foaming agent, the foam is extremely rich, and the slime and other non-ferrous metals The target minerals are easily entrained and floated, which affects the quality of the lead concentrate. The target minerals in the subsequent flotation operations are lost in the lead concentrate due to entrainment, and the recovery rate will be low.

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