Floating and enriching method of low-grade manganese dioxide ore

Abstract

The invention relates to a floating and enriching method of a low-grade manganese dioxide ore. The method is characterized by comprising the following steps of: grinding an original ore, wherein the passing rate of 200 meshes is 98 percent; adding water to regulate the concentration of ore pulp to 10-30 percent and the pH value to be between 5 and 7; then adding an inhibitor containing oxalic acid, citric acid and dextrin according to a certain proportion and stirring the inhibitor to have a sufficient contact with ore grains; adding a collecting agent consisting of alkyl sulfate and fatty acid to the regulated ore pulp and then selecting a proper process flow according to a manganese grade range in the original ore; and finally, filtering floated tailings through multiple stages of fine selecting and scavenging to obtain manganese-enriched tailings the manganese grade of which is more than 32 percent. The method can be used for floating ores the manganese dioxide grade of which is 5-14 percent, and the low-grade manganese dioxide ores are effectively utilized to produce high-grade manganese ore powder, thus the raw material problems of domestic numerous electrolytic manganese production enterprises are solved.

Description

technical field [0001] The invention relates to a low-grade manganese dioxide ore flotation enrichment method. Background technique [0002] my country's manganese ore resources only account for 5% of the world's total, but its electrolytic manganese production capacity accounts for 98.6% of the world's total, and its electrolytic manganese output accounts for 97.4% of the world's total. The raw material of electrolytic manganese is mainly manganese carbonate. However, due to the unbalanced distribution of manganese ore resources in my country, most of the ore deposits are small and medium-sized. The ore structure is complex, the particle size is fine, and it is difficult to separate. Moreover, manganese carbonate ore resources are increasingly scarce after years of mining, and the grade of manganese carbonate ore that the mine can provide is also getting lower and lower. situation. In recent years, in order to alleviate the tight supply of manganese carbonate, a new process...

AI Technical Summary

Problems solved by technology

The raw material of electrolytic manganese is mainly manganese carbonate. However, due to the unbalanced distribution of manganese ore resources in my country, most of the ore deposits are small and medium-sized. The ore structure is complex, the particle size is fine, and it is difficult to separate. Moreover, manganese carbonate ore resources are increasingly scarce after years of mining, and the grade of manganese carbonate ore that the mine can provide is also getting lower and lower. situation

In recent years, in order to alleviate the tight supply of manganese carbonate, a new process of electrolytic manganese dioxide has emerged in China to utilize the huge reserves of manganese dioxide ore. However, the manganese dioxide ore provided by most mines has a low grade of manganese. They are all below 18%. Due to the high process cost of electrolytic manganese dioxide, these large amounts of low-grade manganese dioxide cannot be used in electrolytic industrial production, and there are few high-grade manganese oxide ores in mines.