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Method for preparing iron oxide red and manganese carbonate by using titanium white waste acid

A technology of titanium dioxide waste acid and iron oxide red, applied in chemical instruments and methods, iron oxide, iron oxide/iron hydroxide, etc., can solve the problem that the product quality cannot meet the high quality requirements, the waste acid cannot be utilized, and the stability cannot be Large-scale production and other problems, to achieve the effect of reuse, short reaction time and stable product quality

Active Publication Date: 2015-04-08
FIDLER ENVIRONMENTAL & ECOLOGICAL ENG SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these patents still have the following shortcomings: 1) a large amount of waste acid cannot be utilized; 2) the product quality cannot meet the high quality requirements of foreign countries, and cannot be stably produced on a large scale

Method used

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  • Method for preparing iron oxide red and manganese carbonate by using titanium white waste acid
  • Method for preparing iron oxide red and manganese carbonate by using titanium white waste acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for producing iron oxide red and manganese carbonate by using titanium white waste acid, comprising the following steps:

[0031] 1) Put 25kg FeSO 4 ·7H 2 O adds 43L of titanium dioxide waste acid (H 2 SO 4 concentration 20%), add 25.5 kg of pyrolusite with a manganese content of 12%, react until the pH of the solution is 1 to 1.5, and filter;

[0032] 2) adding calcium carbonate to the filtrate obtained in step 1) to adjust the pH value to 1.5-2, filtering, adding lime milk to the filter residue to neutralize and discarding;

[0033] 3) add ammonium bicarbonate to the filtrate obtained by filtering in step 2) to adjust the pH value to 2-2.5, keep the temperature at 75-95°C during the reaction, and keep it warm for 2-4 hours;

[0034] 4) Step 3) standing and aging for 12 hours, a large amount of iron-containing intermediate products precipitated, filtered;

[0035] 5) Wash the filter residue obtained in step 4) with water for 1 to 5 times, dry at 100 to 12...

Embodiment 2

[0040] 1) Put 25kgFeSO 4 .7H 2 O adds 43L of titanium dioxide waste acid (H 2 5O 4 concentration 20%), add 20 kg of pyrolusite with a manganese content of 15%, react until the pH value of the solution is 1 to 1.5, obtain ferric iron and divalent manganese, and filter;

[0041] 2) adding calcium carbonate to the filtrate obtained in step 1) to adjust the pH value to 1.5-2, filtering, and adding lime milk to the filter residue to neutralize and transport for disposal;

[0042] 3) adding ammonium carbonate to the filtrate obtained by filtering in step 2) to adjust the pH value to 2-2.5, keeping the temperature at 75-95° C. during the reaction, and keeping it warm for 2-4 hours;

[0043] 4) Step 3) standing and aging for 12 hours, a large amount of iron-containing intermediate products precipitated, filtered;

[0044] 5) Wash the filter residue obtained in step 4) with water for 1-5 times, dry at 100-125°C to obtain a powdery intermediate product, then calcinate the powdery in...

Embodiment 3

[0048] 1) Put 20kg FeSO 4 ·7H 2 O add 35L of titanium dioxide waste acid (H 2 SO 4concentration 20%), add 20.5 kg of pyrolusite with a manganese content of 12%, react until the pH value of the solution is 1 to 1.5, and filter;

[0049] 2) adding calcium carbonate to the filtrate obtained in step 1) to adjust the pH value to 1.5-2, filtering, adding lime milk to the filter residue, neutralizing and transporting for disposal;

[0050] 3) Add sodium carbonate to the filtrate obtained by filtering in step 2) to adjust the pH value to 2-2.5, keep the temperature at 75-95°C during the reaction, and keep it warm for 2-4 hours;

[0051] 4) Step 3) After standing and aging for 12 hours, a large amount of iron-containing intermediate products precipitated and filtered;

[0052] 5) Wash the filter residue obtained in step 4) with water for 1 to 5 times, dry at 100 to 125°C to obtain 13 kg of powdery intermediate product, then calcinate the powdery intermediate product at 600 to 800°C...

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Abstract

The invention discloses a method for preparing iron oxide red and manganese carbonate by using titanium white waste acid. The method comprises the following steps: enabling ferrous sulfate and pyrolusite powder to react with the titanium white waste acid; adding soluble carbonate to obtain a powdery middle intermediate after reaction; and reacting once, so as to obtain the iron oxide red, manganese carbonate and sulfate. The iron oxide red product prepared by the method is high in chemical grade, and good in physical property. The method is economic, and environmentally friendly; industrial by-products are fully utilized; meanwhile, the iron oxide red, the manganese carbonate and the sulfate are prepared; three products can be obtained by production once, and therefore, the method can be applied to large-scale production; the product is stable in quality, and has the advantages of being short in reaction time, high in iron recovery rate and the like; and the titanium white waste acid, the ferrous sulfate and the low-grade pyrolusite are changed into treasures, thus, repeated utilization of resources is achieved.

Description

technical field [0001] The invention relates to a comprehensive utilization method of industrial waste, in particular to a method for preparing iron oxide red and manganese carbonate by using titanium white waste acid. Background technique [0002] As an important branch of magnetic materials, ferrite magnetic materials are widely used in many fields such as wireless communication, automatic control, measuring instruments, aerospace, home appliances, and medicine. In recent years, they have achieved great development in my country. The rate of more than % is growing at a high speed. However, the grade of ferrite produced in my country is not high. One of the reasons is that the necessary raw material for the production of ferrite magnetic materials is iron oxide red (ferric oxide Fe 2 o 3 ) quality is not high, while the price of foreign high-quality iron oxide red is very expensive. Therefore, with the continuous development of my country's ferrite industry, the demand fo...

Claims

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Application Information

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IPC IPC(8): C01G49/06C01G45/00B09B3/00
Inventor 朱军邓勇
Owner FIDLER ENVIRONMENTAL & ECOLOGICAL ENG SUZHOU
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