High-voltage electric pulse pretreatment method for strengthening galena crushing and sorting

Abstract

The invention relates to a high-voltage pulse pretreatment method for strengthening galena crushing and sorting. The method adopts a high-voltage pulse device, and is carried out according to the following steps that (1) a water pump is started to enable water to continuously enter a pulsating insulating barrel and be discharged from a water outlet of a product collector; (2) galena ore is transferred to a pulse insulating barrel through a ore feeding bin, and stacked on a screen with the top in contact with a high voltage electrode; (3) a power supply is turned on, discharging occurs betweenthe high-voltage electrode and a high-voltage negative electrode, so that the galena ore is crushed; (4) a pulsating conical body moves up and down periodically through the rotation of an eccentric wheel, and the small particle part of the galena ore on the screen gradually moves downwards; and (5) the crushed galena ore enters the product collector. By means of the method, the useful mineral content of a crushed product can be increased, the monomer dissociation degree of the crushed product can be improved, the reduction of the energy consumption of subsequent processing procedures is facilitated, and the enterprise cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a high-voltage electric pulse pretreatment method for strengthening the crushing and sorting of galena. Background technique [0002] China's refined lead production and consumption both rank first in the world, and lead is mainly used in lead-acid batteries, alloys, building materials, and pigments. In 2017, the proven reserves of domestic lead resources were 89.67 million tons, China's lead production was 4.7164 million tons, and China's lead consumption was 4.8165 million tons. Due to the association of lead and zinc, the supply pattern of lead mines in 2017 was similar to that of zinc mines, showing a tight situation. The situation; China's concentrate gap in 2017 was about 100,000 tons, which was expanding compared with 2016. The global gap was about 25,000 tons, and the supply of lead ore was still tight; it can be seen that there is a potential seriou...

AI Technical Summary

Problems solved by technology

[0003] my country's lead resources are characterized by relatively large reserves, the main occurrence minerals are galena (PbS) and lead oxide minerals, mainly galena; there are few single rich ores of lead and zinc, and there are many low-grade ores and paragenetic ores. Its characteristic is that the embedded particle size is relatively fine. Therefore, the beneficiation of lead ore in my country faces many problems such as complex symbiotic relationship, difficult lead separation, multiple technological processes, and high beneficiation costs; among them, the most important problems in the field of ore crushing are: crushing and grinding Mining equipment investment and maintenance costs are high, energy consumption is high, too many fine-grained grades that cannot be processed and insufficiently dissociated coarse-grained grades are produced, which increases the difficulty of subsequent sorting operations

[0004] Traditional ore crushing and grinding mainly rely on mechanical energy impact, shearing and grinding to break and erode the ore to achieve the purpose of dissociation of mineral monomers. The crushing mechanism determines that most ores are mainly transgranular crushing, making useful minerals and gangues Minerals cannot be effectively separated

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