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A method of using manganese-containing fume as a catalyst for iron removal in goethite method

A goethite method for iron removal and catalyst technology is applied in the field of non-ferrous metal metallurgy, which can solve the problems of low ferrous ion oxidation efficiency and the like, and achieve the effect of cost reduction

Active Publication Date: 2020-05-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem of low ferrous ion oxidation efficiency in the above-mentioned goethite method iron removal process, and aims to provide a novel and cheap catalyst application method in the goethite method iron removal process, so that in the process solution The ferrous ion can be stably, efficiently and fully oxidized to Fe 3+

Method used

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  • A method of using manganese-containing fume as a catalyst for iron removal in goethite method
  • A method of using manganese-containing fume as a catalyst for iron removal in goethite method
  • A method of using manganese-containing fume as a catalyst for iron removal in goethite method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Simulate the preparation of iron-containing solution in the process of zinc smelting, in which Zn 2+ 140g / L, Fe 2+ 8g / L, Fe 3+ 2g / L,H 2 SO 4 18g / L, feed compressed air into the reaction solution at a flow rate of 0.6L / min, control the reaction temperature at 80°C, control the stirring speed of the solution at 1000r / min, and add 10% sodium carbonate solution through a numerically controlled pH automatic replenishment machine into the reaction solution to timely and accurately control the pH of the reaction solution within the range of 2 to 3.5. In this embodiment, the addition amount of manganese-containing fumes is 0 g / L. The ferrous ion content in the solution in different time periods under this condition is listed in Table 1.

[0025] The content of ferrous ions in the solution in different reaction time periods of table 1

[0026]

Embodiment 2

[0028] The addition of manganese-containing soot is 2g / L, and other conditions are consistent with those in Example 1. Under this condition, the content of ferrous ions in the solution in different reaction time periods was investigated, and the results are shown in Table 2.

[0029] The content of ferrous ion in the solution in table 2 different reaction time periods

[0030]

Embodiment 3

[0032] In this embodiment, the addition amount of manganese-containing fumes is 4g / L, and the rest of the conditions are kept consistent with the above-mentioned embodiments. The content of ferrous ions in the solution in different reaction time periods under this condition is shown in Table 3.

[0033] The content of ferrous ions in the solution in different reaction time periods of table 3

[0034]

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Abstract

The invention discloses a method used for goethite process iron removal with manganese-contained smoke dust as a catalyst. In the zinc leaching agent goethite process iron removal (sulphuric acid medium) system, the manganese-contained smoke dust is used as the catalyst, air serves as an oxidizing agent, a 10% sodium carbonate solution serves as a neutralizing agent, and under the certain temperature and stirring condition, the use amount of the manganese-contained smoke dust and the oxidation rate of Fe2+ are subjected to expedition. Through the result, it finds that the industrial solid waste manganese-contained smoke dust serves as the catalyst, and the oxidation rate of Fe2+ in the goethite process iron removal system can be increased, within a certain manganese-contained smoke dust use amount range, the oxidation rate of Fe2+ is increased along with increasing of the manganese-contained smoke dust adding amount, when the use amount of added manganese-contained smoke dust exceeds about 4.0g / L, the influence of increasing of the manganese-contained smoke dust amount on the Fe2+ catalytic oxidation rate tends to be gentle, and it is considered that when the adding amount of the manganese-contained smoke dust is about 4.0 g / L, oxidation of Fe2+ in the system is in the ideal degree.

Description

technical field [0001] The invention relates to the field of non-ferrous metal metallurgy, in particular to a method of using industrial waste slag and manganese-containing fume as a catalyst to catalyze the oxidation of Fe in the iron removal process of goethite method. 2+ application method. Background technique [0002] The roasting or leaching solution of zinc concentrate in the process of hydrometallurgy contains a large amount of iron elements, including ferrous ions and ferric ions. Iron removal is an important process in the purification process of zinc leaching solution. At present, the most widely used iron removal methods in zinc leachate mainly include hematite method, jarosite method and goethite method. Among them, the goethite method is an iron removal method that has been widely used in recent years and has a better iron removal effect. Its advantages are mainly that it can be applied at normal pressure and lower temperature, the process equipment is simpl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B19/20C22B3/44C22B7/02
CPCC22B7/009C22B7/02C22B19/26Y02P10/20
Inventor 曾伟志王庆伟梁彦杰杨建广刘山李博李垦宴阳胡辉
Owner CENT SOUTH UNIV
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