Phosphorous removal method for manganous sulfate produced from high-phosphorus rhodochrosite

Abstract

The invention provides a phosphorous removal method for manganous sulfate produced from high-phosphorus rhodochrosite. The phosphorous removal method comprises the steps of (1), at the room temperature, adding ferrous sulfate and a hydrogen peroxide solution to a manganous sulfate solution produced from high-phosphorus rhodochrosite to form a mixed solution, and then carrying out an oxidization reaction in a stirring state, (2) adding stronger ammonia water to the mixed solution obtained in the step (1) to regulate the pH value to the range from 3 to 5, and then thoroughly stirring under the room temperature to obtain a mixed slurry, and (3) standing and precipitating the mixed slurry obtained in the step (2), and then filtering and separating, and obtaining the filtrate, namely, a low-phosphorus manganous sulfate solution. Compared with the prior art, the phosphorous removal method is capable of effectively avoiding the problems of complex operation, high energy consumption and / or pollution on the environment possibly caused by phosphorous removal during mineral separation, and also has the advantages of mild reaction conditions and relatively lower cost.

Description

technical field [0001] The invention relates to a method for dephosphorizing the manganese sulfate solution prepared from high phosphorus rhodochrosite. Background technique [0002] Metal manganese (Mn) is an important industrial raw material, and electrolysis is one of the methods to obtain metal manganese. The basic steps are as follows: firstly, manganese ore is used as raw material, and after it is crushed, sulfuric acid is added to make manganese-containing leaching solution—manganese sulfate solution; to obtain manganese metal. Manganese ore in my country is mostly lean ore, and the content of harmful impurities is relatively high. Due to the high phosphorus content in the electrolysis process, not only will the anode potential be greatly increased, oxygen will be precipitated, the current efficiency will be reduced, and the anode will be corroded and damaged rapidly, which will lead to low efficiency of the cathode metal manganese plate; Economic losses. In addit...

AI Technical Summary

Problems solved by technology

In the prior art, there are indeed many methods for removing phosphorus (dephosphorization) for different types of high-phosphorus manganese ores. However, in these methods, some operations are more complicated, some have higher energy consumption, and some May pollute the environment

In particular, these methods are all carried out in the beneficiation stage, and some are only applicable to pyrolusite

In the case that the high-phosphorus rhodochrosite is used as the raw material to prepare the manganese sulfate solution that can be used as the electrolyte, if the existing technology is still used to carry out one more beneficiation process on the high-phosphorus rhodochrosite, the final result will be low. The cost of phosphorus manganese sulfate solution is greatly increased

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