Method for removing organic matters in solution through spray catalysis in multi-field coupling high-energy field

Abstract

The invention discloses a method for removing organic matters in a solution through spray catalysis in a multi-field coupling high-energy field, which comprises the following steps: spraying and atomizing liquid after wet-process nickel smelting extraction through a high-pressure spraying device to enter the multi-field coupling high-energy field, and carrying out catalytic decomposition in the multi-field coupling high-energy field to remove the organic matters in the liquid after wet-process nickel smelting extraction, the removed liquid flows into a settling chamber to settle the damaged trace catalyst, and supernatant liquid flows out from an overflow port, so that the nickel hydrometallurgy extraction liquid without the organic matters can be obtained; according to the method, the ultrasonic wave, microwave and ultraviolet light wave multi-field coupled high-energy field catalytic reaction is applied to the removal reaction of the organic matters in the nickel hydrometallurgy extraction liquid, so that the organic matters in the solution are decomposed, the purpose of removing the residual organic matters in the solution is achieved, the content of the organic matters is reduced from 1000ppm to 2ppm or below, and the removal rate of the residual organic matters in the solution is improved. And the potential harm of organic matters to the electrodeposited nickel is fundamentally avoided.

Description

technical field [0001] The invention relates to a method for removing organic substances from a liquid after extraction of nickel hydrometallurgy, in particular to a method for removing organic substances from a liquid after extraction from nickel hydrosmelting by spraying in a multi-field coupled high-energy field, and belongs to the technical field of hydrometallurgy . Background technique [0002] In the production process of wet smelting nickel, the solvent extraction method is used to comprehensively separate metal impurity elements such as Zn, Cr, Cd, Mn, Fe, Mg, Ca, etc., the extractant and diluent kerosene remaining in the liquid after extraction, these organic compounds It exists in the solution in the form of oil film, dispersed oil and dissolved oil, resulting in a relatively high content of organic matter in the required solution after extraction and separation. Affecting the current efficiency of nickel electrodeposition will also lead to excessive C content in...

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Problems solved by technology

[0013] The above methods can partially remove the organic matter in the liquid after nickel extraction by wet method, each has its own advantages, but there are common shortcomings: the removal of organic matter by physical methods is the main method, and the organic matter remaining in the liquid after extraction cannot be completely decomposed or completely removed; therefore, the potential harm to nickel electrowinning and the impact on product quality caused by the residual organic matter in the extracted liquid cannot be fundamentally solved

[0014] Most of the existing technologies need to be carried out in a high-pressure and high-temperature environment, with high energy consumption, high safety risks, long reaction time (2 to 4 hours), continuous production is difficult, high production costs, and there is a large amount of hydrogen that adsorbs organic matter Iron and ferric oxide waste residues are produced, which is difficult to popularize and apply in production, and the organic content after removal still contains about 4ppm. In the nickel electrowinning process, the organic content in the general catholyte is required to be within 2ppm. Therefore, It is a technical problem that needs to be solved to develop a method that can deeply remove trace amounts of dissolved organic matter in the liquid after nickel extraction by wet nickel smelting.

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