A method of using high-iron sphalerite to strengthen bornite leaching

Abstract

The invention provides a method for reinforcing leaching of bornite through high-iron sphalerite. The method includes the following steps that the high-iron sphalerite and the bornite are ground, andhigh-iron sphalerite powder and bornite powder are obtained; a 9K basic culture medium is subjected to high-temperature high-pressure steam sterilization, and the high-iron sphalerite powder and the bornite powder are intermittently sterilized; the sterilized high-iron sphalerite powder and the sterilized bornite powder are mixed, then the sterilized 9K basic culture medium is added, ore pulp is obtained, and then the pH value of the ore pulp is adjusted to 1.5-2.0; and the ore pulp is subjected to agitation leaching, and chemical conditions of a leaching solution are adjusted and controlled.The whole leaching period is shortened, meanwhile, the leaching rate and the leaching speed are greatly increased, and the method is clean and environmentally friendly, low in cost and suitable for large-scale application and popularization.

Description

technical field [0001] The invention relates to the fields of hydrometallurgy and mineral processing, in particular to a method for enhancing bornite leaching by utilizing high-iron sphalerite. Background technique [0002] Copper is an indispensable non-ferrous metal in human production and life. Copper smelting technology is mainly divided into two types: pyrometallurgy and hydrometallurgy. Pyro smelting requires high copper grade, and a large amount of sulfur dioxide flue gas will be generated during the smelting process, causing environmental pollution; pyro smelting consumes a lot of energy; pyro smelting will cause iron in copper concentrate to adhere to slag In the process, a large amount of solid waste is generated, which causes waste of iron resources and environmental pollution to a certain extent. As the world's largest copper consumer, my country has a huge demand for copper. However, there are few 10,000-ton copper mines in my country, and the copper grade is ...

AI Technical Summary

Problems solved by technology

Compared with the acidic leaching system, the alkaline leaching system has some disadvantages: 1. The reagent for alkaline leaching is ammonia water. In order to reduce the volatility of ammonia water, it needs to be mixed with ammonium salt as the leaching agent during the leaching process, which increases the cost of leaching.

3. When the copper ore is leached in the alkaline leaching system, other metal elements in the mineral, such as iron, will be converted into insoluble oxygen or hydroxyl compounds and filtered out, resulting in a certain waste of resources

4. Under the conditions of oxygen as oxidant, low temperature and alkaline leaching, the oxidative leaching rate of copper ore is relatively slow, so alkaline leaching is often carried out at high temperature and high pressure. On the one hand, high temperature and high pressure conditions have higher requirements on leaching equipment, so the acid leaching system is easier to promote and apply

[0005] At present, acidophilic microorganisms are used to leaching bornite, which can promote the leaching of bornite to a certain extent, but there are still problems such as slow leaching rate, low leaching rate, long leaching period (several months), high acid consumption, Problems such as slower growth of microorganisms in it

[0006] The current status of the existing wet leaching bornite is: when the leaching time is short, the leaching rate is low; and when the leaching rate is high, the leaching time is too long, so how to shorten the leaching cycle and realize efficient leaching of bornite , become the current technical problem