Method for increasing leaching rate of copper in cuprite type copper oxide ore by adding chlorine dioxide

Abstract

The invention belongs to the technical field of beneficiation metallurgy, and discloses a method for increasing the leaching rate of copper in cuprite type copper oxide ore by adding chlorine dioxide, which comprises the following steps: adding a proper amount of cuprite into a three-necked round-bottom flask, and pre-stirring for a certain time; the method comprises the following steps: adding a certain mass of chlorine dioxide into a three-necked round-bottom flask, stirring at normal temperature, oxidizing the cuprite, and converting cuprous oxide of the cuprite into copper oxide; sulfuric acid is added, and a leaching test is conducted through water bath kettle heating; and leaching liquid is filtered, extracted and subjected to electrodeposition to recover copper. According to the method, the cuprite type copper oxide ore is directly leached, the reaction time is long, the reaction temperature is high, and the leaching efficiency of the cuprite type copper oxide ore in sulfuric acid is improved by adding chlorine dioxide; chlorine dioxide has no harm to human bodies and animals and does not cause secondary pollution to the environment, so that harmful components cannot be left in a leaching solution after leaching; meanwhile, chlorine dioxide is used in oxidation leaching of the cuprite type copper oxide ore, and a new direction is provided for leaching of other minerals.

Description

technical field [0001] The invention belongs to the technical field of beneficiation and metallurgy, and in particular relates to a method for adding chlorine dioxide to improve the leaching rate of copper in cuprite-type copper oxide ore. Background technique [0002] At present, copper metal is one of the earliest metals discovered by mankind. In modern industry, it is widely used in various industries due to its excellent physical and chemical properties. According to the geological survey data of relevant departments, China's copper resource reserves are 26 million tons, ranking sixth in the world. Its distribution range is wide, and it is distributed in Heilongjiang, Jiangxi, Tibet, Xinjiang, Yunnan and Hubei. Most of the ore deposits are small and medium-sized, with few high-grade ores, and few single-metal copper ore, which basically coexist with various metal ores. In nature, copper usually exists in the form of sulfide and oxide minerals, such as azurite, malachit...

AI Technical Summary

Problems solved by technology

[0006] (1) The existing sulfide-xanthate flotation method and direct leaching method have poor flotation effect on cuprite

[0007] (2) The conventional leaching method only uses non-oxidizing leaching agents to obtain poor leaching effects

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