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Resource utilization method for industrial iron-containing acid solution

An acidic solution and resource recovery technology, applied in chemical instruments and methods, compounds of elements in group 5/15 of the periodic table, organic chemistry, etc., can solve the problems of difficult filtration and separation of precipitated products, low purity of products, loss of components, etc. problems, to achieve the effect of easy automatic production and popularization, high purity and simple process

Pending Publication Date: 2021-11-30
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, in the currently existing methods for the recycling of iron-containing acidic solutions, the technical application is limited under strong acidic conditions. In the existing methods for highly selective iron removal in acidic systems, there are co- Precipitation will cause the loss of other components, the problem of low product purity, the problem that the precipitated product is difficult to filter and separate, etc.

Method used

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  • Resource utilization method for industrial iron-containing acid solution
  • Resource utilization method for industrial iron-containing acid solution
  • Resource utilization method for industrial iron-containing acid solution

Examples

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Effect test

example 1

[0048] In this example, the resource utilization method of the industrial iron-containing acidic solution includes the following steps:

[0049] S1. Remove impurities, crush and grind the limestone raw material to obtain limestone powder with a particle size of less than 150 μm (-100 mesh), and use the acidic production waste liquid with pH=0.24 generated during the wet resource utilization of asbestos tailings Place in a reactor equipped with a stirring device and slowly add limestone powder while stirring, adjust the pH of the system to 1.0, stir and react at 10°C for 60 minutes at a stirring speed of 300r / min, and let it stand for 10 minutes after the reaction.

[0050] S2, using a belt-type suction filtration-washing all-in-one machine to carry out suction filtration dehydration and rinsing for 3 times to obtain the first filtrate and the first filter cake, the iron ion content of the first filtrate is 1.55g / L, store for later use, the first filter cake Dry under natural c...

example 2

[0054] In this example, the resource utilization method of the industrial iron-containing acidic solution includes the following steps:

[0055] S1. Put the acidic production waste liquid with pH=1.0 produced during the wet resource utilization of asbestos tailings in a reactor with a stirring device and slowly add limestone powder while stirring to adjust the pH of the system to 1.5. The mixture was stirred and reacted for 60 minutes at a stirring speed of 300 r / min, and aged for 10 minutes after the reaction was completed. The particle size of the limestone powder is less than 150 μm (-100 mesh), and can be obtained by removing impurities, crushing and grinding limestone raw materials.

[0056] S2, using a belt-type suction filtration-washing all-in-one machine to carry out suction filtration dehydration and rinsing for 3 times to obtain the first filtrate and the first filter cake, the iron ion content of the first filtrate is 1.55g / L, store for later use, the first filter ...

example 3

[0060] In this example, the resource utilization method of the industrial iron-containing acidic solution includes the following steps:

[0061] S1. Put the acidic production waste liquid with pH=0.7 produced during the wet resource utilization of asbestos tailings in a reactor with a stirring device and slowly add limestone powder while stirring to adjust the pH of the system to 1.0. The mixture was stirred and reacted for 60 minutes at a stirring speed of 300 r / min, and aged for 10 minutes after the reaction was completed.

[0062] S2, using a belt-type suction filtration-washing all-in-one machine to carry out suction filtration dehydration and rinsing for 3 times to obtain the first filtrate and the first filter cake, the iron ion content of the first filtrate is 1.55g / L, store for later use, the first filter cake Dry under natural conditions of ventilation or sunlight until the moisture content of free water is less than or equal to 3%, to obtain gypsum products.

[0063...

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Abstract

The invention provides a resource utilization method for an industrial iron-containing acidic solution. The pH value of the industrial iron-containing acidic solution is less than 2.0. The method comprises the following steps: pre-neutralizing the industrial iron-containing acidic solution to obtain a first mixed system; filtering the first mixed system to obtain a first filtrate and a first filter cake, wherein the pH value of the first filtrate is 0.5-2.0; adding an organic complexing precipitant into the first filtrate, and conducting reacting to obtain a second mixed system; and filtering the second mixed system to obtain a second filtrate and a second filter cake, wherein the second filtrate is a refined solution, the organic complexing precipitant is a phosphorus-containing organic complexing precipitant, and a molar ratio of phosphorus in the organic complexing precipitant to iron in the first filtrate is (1.5-3.0): 1. The method has the beneficial effects that the technology can obtain a better iron removal effect in a strongly acidic system with a pH value of less than 3.0; the industrial iron-containing acidic solution can be recycled to obtain gypsum, iron-containing organic dithiophosphate, raw materials for producing low-iron products and other products; and high value-added resource utilization of the iron-containing acid solution can be realized.

Description

technical field [0001] The invention relates to the treatment of industrially produced acidic solutions, in particular to a resource utilization method for industrially produced iron-containing acidic solutions. Background technique [0002] In hydrometallurgy, solid waste resource utilization, and other industrial production processes, a large amount of iron-containing acidic solution will be produced. Since the solution contains many other metal ions, in the recycling process, the traditional chemical precipitation due to co-precipitation, after-treatment It is difficult to remove iron by precipitation, which seriously affects the subsequent application of the solution. Therefore, high-selective iron removal in acidic systems is still a key technology for the high-purity separation and product production of complex component systems. The publication number is CN107385219A and the Chinese patent application document CN111004925A records the use of sodium carbonate to adjus...

Claims

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Application Information

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IPC IPC(8): C07F9/177C07F9/17C01F11/46
CPCC07F9/177C07F9/17C01F11/46Y02P10/20
Inventor 彭同江周绿山孙红娟
Owner SOUTHWEAT UNIV OF SCI & TECH
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