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

A high-phosphorus manganese ore, low-grade technology, applied in the direction of process efficiency improvement, etc., can solve the problems of unstable microbial transmission variation, not being practically applied, and failing to achieve good results, etc., to achieve good production sustainability and economical comfort Compatibility, easy industrial production, and low cost

Inactive Publication Date: 2011-09-14
KUNMING UNIV OF SCI & TECH
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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

Method used

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

Examples

Experimental program
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Effect test

Example Embodiment

[0022] Example 1: The chemical composition (mass fraction) of the processed manganese-poor and high-phosphorus pyrolusite is: Mn 13.38%, Fe1.70%, Al 2 O 3 0.62%, CaO39.48%, MgO1.26%, P0.146%.

[0023] The process steps used are:

[0024] 1.1 The low-grade primary high-phosphorus manganese ore is crushed to fine-grained raw ore powder, then concentrated acid is added to it and mixed evenly, and then placed for a certain period of time under normal temperature and pressure to fully mature the low-grade manganese ore;

[0025] 1.2 Adjust the concentration of the matured ore powder slurry, and then use dilute acid as the leaching agent under appropriate temperature and normal pressure to make it fully carry out the leaching reaction, and enrich the manganese in the ore in the leaching residue, while the phosphorus is Phosphoric acid enters the leaching solution, so that iron, calcium, magnesium and other elements enter the leaching solution in the form of water-soluble salts;

[0026] 1.3...

Example Embodiment

[0029] Example 2:

[0030] The chemical composition (mass fraction) of the treated low-manganese high-phosphorus high-temperature roasted black manganese ore is: Mn18.84%, Fe4.43%, Al 2 O 3 2.52%, CaO50.32%, MgO2.61%, P0.38%.

[0031] The process steps used are the same as in Example 1.

[0032] After the raw ore is crushed, it is sieved to 95% under a 0.2mm sieve. Take 100g of raw ore powder under the sieve, mix it with 80ml industrial dilute nitric acid (concentration 68%) in a reaction vessel, and place it at room temperature for 1.5 days (36h). After maturation, use dilute nitric acid (pH=1) as the leaching agent to adjust the slurry The material concentration is 100g / L, leaching for 2h at a temperature of 40°C, so that phosphorus enters the leaching solution in the form of phosphoric acid, and iron, calcium, magnesium, aluminum, etc., in the form of nitrate. Then it is separated and washed by filtration to obtain manganese-rich slag.

[0033] It was determined that the manganes...

Example Embodiment

[0034] Example 3: The chemical composition (mass fraction) of the treated manganese-poor and high-phosphorus ferromanganese ore is: Mn20.91%, Fe18.46%, Al 2 O 3 6.10%, CaO1.51%, MgO0.54%, P0.39%.

[0035] The process steps used are the same as in Example 1.

[0036] After the raw ore is crushed, it is sieved to 95% under the 0.1mm sieve. Take 500g of raw ore powder under the sieve, mix it with 150ml industrial concentrated sulfuric acid (98% concentration) in the reaction vessel, leave it at room temperature for 1 day (24h), use dilute sulfuric acid (pH=1) as the leaching agent after maturation, adjust the slurry The material concentration is 200g / L, leaching for 3h at 60°C, so that phosphorus enters the leaching solution in the form of phosphoric acid, and iron, calcium, magnesium, aluminum, etc. in the form of sulfate. Then it is separated and washed by filtration to obtain manganese-rich slag.

[0037] It is determined that the manganese-rich slag contains Mn45.35% and P0.094%, ...

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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%...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B3/06C22B47/00
CPCY02P10/20
Inventor 张泽彪赖国栋彭金辉李玮罗星姚现召褚丽娟刘能生
Owner KUNMING UNIV OF SCI & TECH
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