Method for treating primary low-grade high-phosphorus manganese ore by acid blending curing

Abstract

The invention relates to a method for treating primary low-grade high-phosphorus manganese ore by acid blending curing, and belongs to the field of wet metallurgy of metallurgical technology. The low-grade primary high-phosphorus manganese ore, the manganese grade of which is 13 to 24 percent, is used as a raw material. The method comprises the following steps of: crushing the manganese ore into primary ore powder before the low-grade primary high-phosphorus manganese ore is leached, adding industrial concentrated acid (nitric acid, hydrochloric acid, sulfuric acid and the like), curing the primary high-phosphorus manganese ore at normal temperature, leaching the cured manganese ore by using diluted acid (the pH value is 1 to 2) under the conditions that the concentration of slurry is 50 to 200g / L and the temperature is 25 to 60 DEG C, filtering, separating and washing, wherein the slag is high-quality manganese-rich ore, P / Mn of which is less than or equal to 0.003 and the manganese grade of which is 30 to 45 percent. The method can be used for reducing the flow of the traditional ore dressing process, removing most phosphorus and greatly improving the grade of manganese; the recovery rate of the manganese is more than 80 percent, and the leaching rate of the phosphorus is more than 90 percent; and the method can be used for large-scale and intensive production of the manganese-rich ore for metallurgy, and gives rise to good economic benefit and social benefit.

Description

technical field [0001] The invention relates to an industrial concentrated acid aging water immersion method at normal temperature, a method for removing harmful element phosphorus from refractory low-grade primary high-phosphorus manganese ore, and belongs to the field of metallurgical technology hydrometallurgy. Background technique [0002] Manganese has a wide range of uses, involving almost all aspects of human production and life. In the iron and steel industry, manganese is the second most important metal after iron. Almost 90% of manganese is consumed in the iron and steel industry. Manganese exists in large quantities in the earth's crust, with an average content of about 0.1%. my country's cumulative proven manganese ore reserves are 640 million tons, and manganese metal reserves are 40 million tons. my country's manganese ore resources are characterized by low grade and complex ore structure, with an average grade of about 20%. Low-grade ore accounts for about 94%...

AI Technical Summary

Problems solved by technology

The microbial method is to lower the pH of the system through the metabolic acid production of bacteria, fungi, and actinomycetes, so that phosphorus minerals dissolve and enter the liquid phase. At the same time, the metabolic acid production also interacts with Ca 2+ , Mg 2+ 、Al 3+ Plasma forms complexes to promote the dissolution of phosphorus minerals. This method has not been practically applied due to the instability of microbial passage variation and the complex and changeable conditions of minerals.

The dephosphorization method outside the furnace is to smelt manganese ore or sintered ore with high phosphorus content into silicon-manganese alloy in an electric furnace, put the hot alloy into the molten iron ladle outside the furnace, and then add a dephosphorization agent to it. To achieve the removal of phosphorus in the alloy, this method is complex in process and will increase the phosphorus content of molten iron due to incomplete dephosphorization during dephosphorization, thus failing to achieve the desired purpose

The microwave roasting-magnetic separation method uses the rapid temperature rise of pyrolusite under the microwave field to transform the pyrolusite into black manganese ore, and uses the strong magnetic properties of black manganese ore to separate the black manganese ore. block, the phosphorus element is enriched in the molten nodules, which cannot achieve good results

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