Method for preparing battery-grade iron phosphate and manganese phosphate from manganese ore leaching residues

A technology for extracting slag and iron phosphate, which is applied in the direction of iron sulfate, chemical instruments and methods, phosphorus compounds, etc., can solve the problems of insufficient utilization and recycling, pollute the environment, waste of resources, etc., and achieve increased production costs, improved purity, The effect of increasing productivity

Pending Publication Date: 2021-08-13
广西锰华新能源科技发展有限公司
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  • Description
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for recycling ferromanganese resources in manganese ore leaching slag, so as to solve the problems of resource waste and environmental pollution due to insufficient utilization and recycling of existing manganese ore leaching slag resources. Recovery of ferromanganese elements in manganese ore leaching slag, preparation of battery-grade iron phosphate and manganese phosphate by means of sulfide removal and phosphate co-precipitation

Method used

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  • Method for preparing battery-grade iron phosphate and manganese phosphate from manganese ore leaching residues

Examples

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Effect test

Embodiment 1

[0028] Take 100g of manganese ore leaching slag from a certain factory, including manganese: 10.85%, iron: 22.34%, add 200ml of dilute sulfuric acid with a mass fraction of 50%, and stir for 3 hours at 50°C. Solid-liquid separation was obtained to obtain ferromanganese acid solution, and 10 g of reduced iron powder was added to obtain a mixed solution of ferrous sulfate and manganese sulfate. Under the condition of 60° C., 1.5 ml of ammonium sulfide solution and 20 ml of hydrogen peroxide were added, stirred and reacted for 1 hour, and solid-liquid separation was performed to obtain a purified solution. According to iron: phosphorus = 1:1.5, 5 g of ammonium dihydrogen phosphate was added, and at 80° C., the pH was adjusted to 2.5 with ammonia water, and the reaction was stirred for 3 hours. Filtrate to obtain iron phosphate precipitation, continue to adjust the pH of the filtrate to 5.5 to obtain manganese phosphate. The obtained iron phosphate is dried at 250°C for 1 hour an...

Embodiment 2

[0030] Take 1500g of manganese ore leaching slag from a certain factory, including manganese: 1.85%, iron: 17.13%, add 2500ml of dilute sulfuric acid with a mass fraction of 40%, and stir for 1 hour at 80°C. Solid-liquid separation was carried out to obtain ferromanganese acid solution, and 192 g of reduced iron powder was added to obtain a mixed solution of ferrous sulfate and manganese sulfate. Under the condition of 50° C., 20 ml of sodium sulfide solution and 100 ml of hydrogen peroxide were added, stirred and reacted for 2 hours, and solid-liquid separation was performed to obtain a purified solution. According to iron: phosphorus = 1:1.3, add 200 g of diammonium hydrogen phosphate, adjust the pH to 3 with ammonia water at 75° C., and stir for 2 hours. Filtrate to obtain iron phosphate precipitation, continue to adjust the pH of the filtrate to 5 to obtain a small amount of manganese phosphate. The obtained iron phosphate is dried at 200°C for 2 hours and then dried at 5...

Embodiment 3

[0032] Take 200g of manganese ore leaching slag from a certain factory, including manganese: 5.54%, iron: 10.22%, add 250ml of dilute sulfuric acid with a mass fraction of 80%, and stir at 70°C for 1h. Solid-liquid separation was obtained to obtain ferromanganese acid solution, and 11 g of reduced iron powder was added to obtain a mixed solution of ferrous sulfate and manganese sulfate. Under the condition of 60° C., 2 ml of sodium sulfide solution and 5 ml of hydrogen peroxide were added, stirred and reacted for 1 hour, and solid-liquid separation was performed to obtain a purified solution. According to iron: phosphorus = 1:1.5, add 10 g of ammonium dihydrogen phosphate, and adjust the pH to 6 with ammonia water under the condition of 80° C. to obtain mixed precipitation of iron phosphate and manganese phosphate. Dry the obtained mixed precipitate at 600°C for 3 hours to obtain battery grade ferromanganese phosphate.

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Abstract

The invention discloses a method for preparing battery-grade iron phosphate and manganese phosphate from manganese ore leaching residues, which comprises the following steps: adding dilute sulphuric acid into the manganese ore leaching residues to obtain a ferromanganese leaching solution, and adding a reducing agent into the ferromanganese leaching solution to obtain a mixed solution of ferrous sulfate and manganese sulfate; adding sulfide into a mixed solution of ferrous sulfate and manganese sulfate to obtain a mixed purified solution of ferrous sulfate and manganese sulfate, adding an oxidizing agent into the mixed purified solution of ferrous sulfate and manganese sulfate to oxidize ferrous sulfate into a ferric sulfate solution, adding phosphoric acid or phosphate into the mixed purified solution of ferric sulfate and manganese sulfate, and adding a pH regulator to regulate the pH of the purified solution at the same time; and obtaining the battery-grade iron phosphate precipitate and the manganese phosphate precipitate. According to the method, the problems that resources are wasted and the environment is polluted due to the fact that the resources of the existing manganese ore leaching residues cannot be fully utilized and recycled are solved, and the battery-grade iron phosphate and the battery-grade manganese phosphate are prepared from manganese and iron elements in the manganese ore leaching residues through a vulcanization impurity removal method and a phosphate coprecipitation method.

Description

technical field [0001] The invention relates to an aluminum ingot production equipment, in particular to an aluminum liquid distributor for an aluminum ingot continuous casting machine. Background technique [0002] Manganese ore resources are important mineral resources in my country. Due to the similar geochemical behavior of iron and manganese, they often co-exist closely in geological processes. Among the main manganese ores that have been identified in my country, high-iron manganese ore (Mn / Fe≤3) accounts for 35.18 %, and there are tens of millions of tons of ferromanganese ore (Mn / Fe≤1), which cannot be directly used as raw materials for smelting ferromanganese because of the low ferromanganese ratio of this type of ore. With the development of modern industry, manganese is used more and more widely, and its application in battery materials, nonferrous smelting, electronic technology, chemical industry, environmental protection, food hygiene, welding electrode industry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/37C01G49/14
CPCC01B25/375C01B25/377C01G49/14C01P2006/80
Inventor 韦庆锰杨雄强
Owner 广西锰华新能源科技发展有限公司
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