Method for strengthening iron removal by oxygen oxidation in solution by using microbubble generating device

A microbubble generating device and oxygen oxidation technology are applied in the direction of improving process efficiency, etc., which can solve the problems of high equipment cost and operating cost, slow oxidation rate of ferrous ions, long time for oxidation and iron removal, etc., and achieve simple structure and shortened time. Running time, effect of shortened time

Inactive Publication Date: 2020-09-15
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the current oxidation and iron removal industry in the hydrometallurgical industry, when compressed oxygen / air / oxygen-enriched air is introduced into the reaction tank using the gas distribution plate or gas distribution pipe device, the oxygen utilization rate is low and the oxidation rate of ferrous ions is slow, resulting in Oxidation iron removal time is long, equipment cost and operation cost are high, etc. The purpose of the present invention is to provide a method of using microbubble generator to strengthen oxygen oxidation iron removal in hydrometallurgical leaching solution or leaching suspension solution, which can Greatly improve the oxidation efficiency of ferrous ions, improve the utilization rate of oxygen, shorten the oxidation time and reduce the cost

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  • Method for strengthening iron removal by oxygen oxidation in solution by using microbubble generating device
  • Method for strengthening iron removal by oxygen oxidation in solution by using microbubble generating device

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Embodiment 1

[0029]The method for strengthening oxygen oxidation and iron removal by applying a microbubble generating device of the present invention is applied to the filtrate after the compounding of rhodochrosite from Geely Baikuang Manganese Industry, using a micro-nano bubble generating device based on the action of a dissolved air pump to oxidize and remove iron, and the volume of the treatment solution is 20L, The iron content in the solution is 3.6g / L, the solution temperature is 50℃, the mechanical stirring is 100rpm, and the amount of bubbles generated is 0.7-1m 3 / h, using ammonia (NH 3 mass fraction 15%) is the neutralizer to adjust the endpoint pH of the solution to 6-6.5. Air and pure oxygen were used as oxidants for oxidative iron removal, and a gas distribution plate with a diameter of 30 cm was used for comparative experiments. The concentration of ferrous ions in the solution was analyzed in real time by chemical titration. The results of the change of ferrous ion concen...

Embodiment 2

[0031] The method for strengthening oxygen oxidation and iron removal by applying a microbubble generating device of the present invention is applied to the rhodochrosite compound suspension of Geely Baikuang Manganese Industry. The bubble generating device oxidizes and removes iron, the volume of the treated suspension is 20L, the iron content in the solution is 3.6g / L, the solution temperature is 50℃, the mechanical stirring is 100rpm, and the amount of bubbles generated is about 3-4m 3 / h, using ammonia (NH 3 15 wt. %) as a neutralizer to adjust the pH of the end point of the solution to 6-6.5. Air and pure oxygen were used as oxidants for oxidative iron removal, and a gas distribution plate with a diameter of 30 cm was used for comparative experiments. The concentration of ferrous ions in the solution was analyzed in real time by chemical titration. The results of the change of ferrous ion concentration with time are as follows: figure 2 shown.

Embodiment 3

[0033] The method for strengthening oxygen oxidation and iron removal by applying a microbubble generating device of the present invention is applied to the process of wet smelting zinc oxidation and iron removal in Chihong Zinc and Germanium Huize Smelting Branch. The concentration of ferrous ions in the pre-iron solution was 2.54g / L, and the goethite method consistent with the industry was used to remove iron. The volume of the test solution is 20L, the temperature of the solution is 80-85°C, and the slurry calcium hydroxide is used as a neutralizing agent to adjust the pH of the solution to 4.5-5.2. Air and oxygen-enriched air (O 2 50vol%) for iron removal by oxidation, and the amount of bubbles generated is about 1m 3 / h, in addition, compared with the air distribution pipe aeration used in the field, the ferrous ion concentration in the solution was analyzed in real time by chemical titration, and the change of ferrous ion concentration with time was as follows: image ...

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Abstract

The invention discloses a method for strengthening iron removal by oxygen oxidation in a solution by using a microbubble generating device. The method uses the microbubble generating device to form oxygen-containing micro-nano bubbles in a wet smelting leaching liquid or a wet smelting leaching suspension liquid to strengthen Fe2+ oxidation, and realizes the rapid oxidation iron removal of the wetsmelting leaching liquid. Compared with an existing aeration disk or an aeration tube type oxygenation, oxygen utilization rate is significantly improved, and the method has the significant advantages such as shortening the oxidation iron removal time, increasing the iron ion purification depth, expanding the production capacity and saving energy consumption.

Description

technical field [0001] The invention relates to a method for oxidizing and removing iron from a wet smelting leaching liquid or a leaching suspension, in particular to forming air, oxygen or The micro-nano bubbles of oxygen-enriched air strengthen the Fe in the solution 2+ Oxidized to Fe 3+ The method belongs to the field of hydrometallurgical purification and impurity removal. Background technique [0002] In the wet smelting of non-ferrous metals such as zinc, nickel, copper, cobalt, and manganese, more or less iron in the smelting raw ore will enter the leaching solution, so that the concentration of iron in the solution is generally 1-15g / L. Before the electrodeposition and purification process, most of the iron ions in the solution must be removed to ensure the economical and effective operation of the subsequent process. The iron removal methods currently used in industry include jarosite (sodium, ammonia) ferrite method, goethite method and hematite method. These ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44C22B19/20C22B23/00C22B15/00C22B47/00
CPCC22B3/44C22B15/0093C22B19/26C22B23/0461C22B47/00Y02P10/20
Inventor 岳彤牛臻孙伟胡岳华
Owner CENT SOUTH UNIV
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