Method for using copper-containing sludge to produce copper concentrate

Abstract

The invention relates to a method for using copper-containing sludge to produce copper concentrate. The method includes: intermittently adding acid, controlling the pH of solution of the whole reaction process to be about 2.5, and reacting for about 100 minutes to obtain stirring acid leaching residue slurry; adding sodium sulfide solution into the stirring acid leaching residue slurry, and stirring for about 15 minutes to obtain vulcanized electroless plating copper residue slurry; adding about 12g of butyl xanthate serving as a collecting agent and about 13g of ammonium dibutyl dithiophosphate into each cubic meter of the vulcanized electroless plating copper residue slurry, stirring for 3 minutes, adding 2g of 2# oil serving as a foaming agent, continuing stirring for 2 minutes, and then roughing for 6 minutes to obtain rough copper concentrate and roughing tailing slurry; concentrating the rough copper concentrate for 5 minutes to obtain copper concentrate and middlings 1, adding 5g of butyl xanthate serving as the collecting agent and 5g of ammonium dibutyl dithiophosphate into each cubic meter of the roughing tailing slurry, stirring and scavenging to obtain middlings 2 and scavenging tailing slurry; adding lime milk to neutralize the scavenging tailing slurry, stirring for 50 minutes and controlling end point pH to be 8, and performing solid-liquid separation after reaction to obtain filtrate and filter cakes. The method is simple in production line and production process, low in total production cost, low in investment, fast to achieve desired results, low in energy consumption, high in copper recycling rate, and the like.

Description

technical field [0001] The invention relates to a hydrometallurgical method, in particular to a method for producing copper concentrate from copper-containing sludge, which is suitable for all industrial applications that produce copper-containing sludge. Background technique [0002] With the rapid development of copper sulfide mining industry, wet copper extraction industry, copper smelting industry, copper deep processing industry and copper electroplating industry, the amount of copper-containing acidic wastewater generated in the industrial production process is also increasing day by day, resulting in copper-containing acidic wastewater The amount of copper-containing sludge produced during the treatment process is also increasing day by day. The sustainable development of mankind is facing various energy and resource shortages. Metal resources are depleted resources and cannot be regenerated by nature. The non-ferrous metal industry should vigorously promote circular ...

AI Technical Summary

Problems solved by technology

The reaction time of this method is short, and the apparent leaching rate of copper is high. However, sulfuric acid is highly corrosive, and requires high anticorrosion requirements for the reaction vessel. Difficult, very poor wash rate, very low overall recovery of copper

Finally, foreign scholars such as Jitka Jandova proposed the calcination acid-soluble recovery method. This treatment method is to carry out acid leaching, calcination, and then acid leaching treatment on the copper-containing sludge, and finally recover it in the form of copper salt. It has a simple process and does not need to add Other reagents, easy to operate, etc., but the energy consumption of the process is high, and the recovered copper salt contains more impurities, and the process needs to be further optimized

In short, there is no existing technology that can make efficient resource utilization of copper-containing sludge

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