Method for separating and recycling acid and metal ions in steel pickling waste liquid

A technology for iron and steel pickling waste liquid and metal ions, which is applied in chemical instruments and methods, metallurgical wastewater treatment, special treatment targets, etc. Good separation and recycling effect

Active Publication Date: 2020-08-25
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Patent CN 109467239 A A method for recovering acid from iron and steel pickling waste liquid uses ultrafiltration membrane device, nanofiltration membrane device, electrodialysis, reverse osmosi

Method used

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  • Method for separating and recycling acid and metal ions in steel pickling waste liquid
  • Method for separating and recycling acid and metal ions in steel pickling waste liquid
  • Method for separating and recycling acid and metal ions in steel pickling waste liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0076] (1) Preparation of chromatographic separation column: take 300mL of solid phase separation material and disperse it in 500mL of water, ultrasonically shake for 15min, the microscopic examination picture is as follows image 3 shown. The dispersed solid phase separation material is wet-packed. Put 300mL of solid phase separation material in the cartridge (DAC dynamic column DAC50), and fill up the remaining part with water to ensure that there are no air bubbles. The packing pressure is 2.5MPa. After the column is packed, wash it with 3BV pure water until there is no turbidity (holding pressure 2.5Mpa: the polymer ball has a 10% expansion rate).

[0077] Wherein, the solid phase separation material is quaternary amine (-N + (CH 3 ) 3 ) modified styrene-divinylbenzene copolymer particles (quaternary ammonium structure content of 15.12%). Particle size 85 microns, particle size difference ± 10 microns; specific surface area 800m 2 / g, pore diameter 50A, pore volume ...

Embodiment 2

[0083] (1) Preparation of chromatographic separation column: Disperse 300 mL of solid-phase separation material in 500 mL of water, and oscillate ultrasonically for 15 min. The dispersed solid phase separation material is wet-packed. Put 300mL of solid phase separation material in the cartridge (DAC dynamic column DAC50), and fill up the remaining part with water to ensure that there are no air bubbles. The packing pressure is 2.5MPa. After the column is packed, wash it with 3BV pure water until there is no turbidity (holding pressure 2.5Mpa: the polymer ball has a 10% expansion rate). Wherein, the solid phase separation material is styrene-divinylbenzene copolymer particles modified by quaternary ammonium (the content of quaternary ammonium structure is 12.76%). Particle size 35 microns, particle size difference +10 microns; specific surface area 800m 2 / g, pore diameter 50A, pore volume 1.2cm 3 / g.

[0084] (2) Loading the sample, take the iron and steel pickling waste ...

Embodiment 3

[0089](1) Preparation of chromatographic separation column: Disperse 300 mL of solid-phase separation material in 500 mL of water, and oscillate ultrasonically for 15 min. The dispersed solid phase separation material is wet-packed. Put 300mL of solid phase separation material in the cartridge (DAC dynamic column DAC50), and fill up the remaining part with water to ensure that there are no air bubbles. The packing pressure is 2.5MPa. After the column is packed, wash it with 3BV pure water until there is no turbidity (holding pressure 2.5Mpa: the polymer ball has a 10% expansion rate). The solid phase separation material is styrene-divinylbenzene copolymer particles modified by quaternary ammonium (the content of quaternary ammonium structure is 13.45%). Particle size 50 microns, particle size difference ± 10 microns; specific surface area 800m 2 / g, pore diameter 50A, pore volume 1.2cm 3 / g.

[0090] (2) Loading the sample, take the iron and steel pickling waste liquid (5...

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Abstract

The invention discloses a method for separating and recycling acid and metal ions in steel pickling waste liquid. The method comprises the following steps of: (1) loading a sample: loading the steel pickling waste liquid containing ferrous ions into a chromatographic separation column containing a solid-phase adsorption material, and collecting effluent in three sections, namely low-concentrationrecovery area effluent, ferrous ion recovery area effluent and original-concentration recovery area effluent; (2) eluting: eluting by using eluent, and collecting eluent in three sections, namely original concentrated recovery area eluent, acid recovery area eluent and low-concentration recovery area eluent; and (3) repeating the step (1) and the step (2), and stopping circulation until a solid-phase separation material has no separation effect on acid and ferrous ions. Compared with the prior art, the method is reasonable and controllable in process, low in equipment requirement and high in separation efficiency; the acid recovery rate of the method is higher than 95%; the metal ion recovery rate of the method is higher than 98; the acid recovery concentration ct/c0 is greater than or equal to 80%; and the metal salt recovery concentration ct/c0 is greater than or equal to 90%.

Description

technical field [0001] The invention belongs to the technical field of waste liquid resource treatment, and in particular relates to a method for separating and recovering acid and metal ions in iron and steel pickling waste liquid. Background technique [0002] my country's iron and steel enterprises use a large amount of sulfuric acid and hydrochloric acid in the production process. However, most of the sulfuric acid cannot be converted into products, and mainly exists in the form of waste acid. For low-concentration acid, it is generally considered to have no recovery value, and the neutralization method is normally used to remove acidity. Discharge or recycle with other harmful substances. However, for high-concentration acid (acid concentration higher than 5%), the main consideration is to use resource recovery to recover acid. [0003] In recent years, scholars at home and abroad have conducted a lot of research and exploration on the treatment of steel pickling waste ...

Claims

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Application Information

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IPC IPC(8): C02F1/28C23G1/36C02F101/20C02F103/16
CPCC02F1/285C02F2101/20C02F2103/16C02F2303/16C23G1/36
Inventor 江伟任连兵魏士明李俊孙平黄升升张全兴
Owner NANJING UNIV
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