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Resource utilization method of hot galvanizing pickling waste hydrochloric acid-containing liquid

A technology for hot-dip galvanizing and waste hydrochloric acid, applied in chemical instruments and methods, zinc compounds, metallurgical wastewater treatment, etc. Easy, high product purity, and the effect of resource reuse

Active Publication Date: 2021-11-16
徐州美利圆环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solvent extraction method has relatively strict process conditions, poor control of temperature and pH value, and the problem of emulsification of the extractant

Method used

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  • Resource utilization method of hot galvanizing pickling waste hydrochloric acid-containing liquid
  • Resource utilization method of hot galvanizing pickling waste hydrochloric acid-containing liquid
  • Resource utilization method of hot galvanizing pickling waste hydrochloric acid-containing liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In Example 1 and Example 2, the hydroxide type macroporous anion exchange resin used is commercially available LX-67 resin. In Example 3, the hydroxide type macroporous anion exchange resin used was commercially available 711 resin.

Embodiment 4

[0048] In Example 4, the hydroxide type macroporous anion exchange resin used was commercially available 717 resin.

[0049] In Examples 1 to 4, the chlorine-type macroporous anion-exchange resin is prepared in the following manner: the hydroxide-type macroporous anion-exchange resin is modified by soaking for 24 hours with a mass content of 5% hydrochloric acid, and then modified with a mass content of 5% hydrochloric acid. 0.5% hydrochloric acid for replacement.

[0050] Example 1

[0051] A method for utilizing resources of hot-dip galvanized pickling solution containing waste hydrochloric acid, comprising the following steps:

[0052] S1. Perform pressure filtration, silicon ceramic filtration, and degreasing and impurity removal on hot-dip galvanized pickling liquid containing waste hydrochloric acid in sequence, so that its TOC is less than 300ppm; the purpose of controlling TOC can prolong the life of the resin and reduce the consumption of hydrogen peroxide.

[0053]...

Embodiment 2

[0061] The steps and process parameters are the same as in Example 1, the difference is that the single resin column in S3. is replaced by a double column in series, that is, two resin columns with the same specification as the resin column in Example 1 are used in series;

[0062] S1. The hot-dip galvanized pickling solution containing waste hydrochloric acid is subjected to pressure filtration, silicon ceramic filtration, and degreasing and impurity removal in sequence, so that its TOC is less than 300ppm; in order to prolong the life of the resin and reduce the consumption of hydrogen peroxide.

[0063] S2. In the solution after S1. treatment, add iron simple substance as reducing agent, make the Fe in the system 3+ reduced to Fe 2+ , so that Fe in the system 3+ The content of zinc is less than 0.05%; after testing, the zinc content in the solution after S2. treatment is 11420ppm, the manganese content is 250ppm, the iron content is 121300ppm, Fe 3+ The content of 450ppm;...

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PUM

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Abstract

The invention discloses a resource utilization method of hot galvanizing pickling waste hydrochloric acid-containing liquid. The method comprises the following steps: carrying out impurity removal on the hot galvanizing pickling waste hydrochloric acid-containing liquid, regulating TOC, controlling the content of Fe < 3 + >, and then carrying out adsorption by adopting chlorine type macroporous anion exchange resin, desorption and manganese removalso as to prepare basic zinc carbonate. The method has the advantages that the process is easy to control, the elements such as zinc, iron and manganese in the waste liquid can be fully separated, the chlorine type macroporous anion exchange resin is high in zinc adsorption efficiency, the purity of the recycled product is high, the recycled ferrous chloride and basic zinc carbonate meet the requirements of industrial standards, and the purpose of resource recycling is well achieved.

Description

technical field [0001] The invention relates to the field of waste liquid treatment, in particular to a resource utilization method for hot-dip galvanizing pickling containing waste hydrochloric acid liquid. Background technique [0002] Hot-dip galvanizing is an important means of steel anti-corrosion. 70% of the world's annual zinc production is used in the field of hot-dip galvanizing anti-corrosion. Since many domestic galvanizing companies use the same pickling pool as the general galvanized parts for backwashing, resulting in cross-cutting Pollution, zinc and iron interact with each other. At this time, the waste acid contains heavy metals, which makes it more difficult to handle and does not cause waste of resources. In the prior art, the treatment of hot-dip galvanizing pickling waste mainly includes neutralization precipitation method and solvent extraction method. The neutralization precipitation method mainly uses the principle of chemical acid-base neutralizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/10C01G9/00C02F9/04C02F101/20C02F103/16
CPCC01G49/10C01G9/00C02F9/00C02F1/001C02F1/40C02F1/70C02F1/42C02F2001/422C02F2101/20C02F2101/203C02F2101/206C02F2103/16Y02P10/20
Inventor 潘文秀涂新海潘江吴阳东王家雷
Owner 徐州美利圆环保科技有限公司