A method for removing residual flotation agents in zinc sulfate solution

Abstract

The invention provides a method for removing a residual flotation reagent in a zinc sulfate solution. Acrylic resin is taken as an absorbing agent and still has a very high removal rate for the flotation reagent when the zinc sulfate solution contains a large quantity of impurities, deep purification can be achieved, and further, the absorption loss of zinc sulfate is very small; and moreover, according to the method, the technological process is short, the cost is low, and a very high industrial feasibility is achieved.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for removing residual flotation agents in zinc sulfate solution. Background technique [0002] At present, zinc is second only to copper and aluminum in the consumption of non-ferrous metals, and is an important non-ferrous metal raw material. The main raw material for zinc smelting is zinc sulfide minerals, but with the increasing reduction of sulfide zinc ore, the development of zinc oxide minerals becomes more and more important. When flotation of zinc oxide ore, direct acid leaching of high-grade zinc oxide ore can be used, and the leaching solution has no effect. The problem of residual flotation reagents, and for low-grade zinc oxide ore, it is necessary to use flotation reagents to enrich zinc oxide to a certain grade before it can be used economically. The flotation reagents are generally fatty acids, organic amines and other organic substances. During t...

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Problems solved by technology

The roasting method can completely decompose the flotation agent in the mineral, but the cost of the roasting de-chemical method is too high, and the flue gas pollutes the environment, so it is not suitable for use; in production practice, the purification methods such as activated carbon adsorption, coagulation, and chemical oxidation are commonly used In addition to the organic matter in the leaching solution during the metallurgical process, such as: Chen Ziyun et al. disclosed the "Organic matter removal process for zinc ore raw materials in hydrometallurgy" ("Spectrum Laboratory" 2012 No. 6, P3707-P3710), using alkaline solution to wash Residual flotation reagents in the raw materials are removed, and the removal effect of this method is not ideal; "Experimental Research on the Removal of Fatty Acid Organic Matters in Zinc Oxide Concentrate Leach Solution" published by Ou Leming et al. P14~P21), investigated the effect of three methods of activated carbon adsorption, coagulation and air flotation on the removal of flotation reagents in zinc sulfate leaching solution, the report pointed out that the removal of flotation reagents was not complete in all three methods, and The loss of zinc sulfate is relatively large

In addition, there are also reports on the removal of organic solvents in solutions by adsorption resins, such as: "Zhengguang brand SD500 replaces active carbon to remove organic matter in water" published by Xiu Huimin and others ("Journal of Wuhan University (Engineering Edition)" 2003 No. 3B Phase , P174~P176), disclosed the method of using Zhengguang brand SD500 adsorption resin to adsorb organic matter in water, but when there are many metal or non-metal impurity elements in the solution, the adsorption capacity of the adsorption resin will be greatly weakened, and the loss of useful metals will also decrease. Therefore, it is an urgent need to develop and utilize low-grade zinc oxide ore resources and alleviate the shortage of raw materials in my country's zinc smelting industry to find a method that can completely remove the residual flotation agent in the zinc sulfate leaching solution and the loss of zinc sulfate is small.

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