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Method for preparing nano zinc sulfide by utilizing hot galvanizing pickling wastewater

A technology for nano-zinc sulfide and pickling wastewater, applied in the direction of zinc sulfide, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problems of discarding and waste, achieve average particle size increase, increase recovery rate, The effect of expanding the application field

Inactive Publication Date: 2021-02-19
和县卜集振兴标准件厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prior art discards it directly, causing great waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for preparing nano-zinc sulfide by using hot-dip galvanizing pickling waste water, mixing zinc ash produced by hot-dip galvanizing with grinding aids, then performing grinding treatment, and then drying to obtain ground zinc ash; Grinding zinc ash and pickling wastewater were reacted once in a magnetic field of a certain strength for 3 hours, and then left to stand for 1 hour, aerated the filtrate for 40 minutes in a water bath at 45°C for 40 minutes, and then subjected to suction filtration to obtain the filtrate; Alkaline solution was added to the composite filtrate to obtain the composite filtrate; sodium sulfide was added to the composite filtrate, stirred at a speed of 500r / min, and the secondary reaction was carried out. , dried to obtain nanometer zinc sulfide. The grinding aid is ethanol; the mixing mass ratio of the ethanol to the grinding aid is 5:1. The grinding speed is 100r / min, and the grinding time is 2 hours. The mixing ratio of the ground zin...

Embodiment 2

[0042] A method for preparing nano-zinc sulfide by using hot-dip galvanizing pickling waste water, mixing zinc ash produced by hot-dip galvanizing with grinding aids, then performing grinding treatment, and then drying to obtain ground zinc ash; Grinding zinc ash and pickling wastewater were reacted once in a magnetic field of a certain strength for 4 hours, and then left to stand for 1 hour, aerated the filtrate for 50 minutes in a water bath at 45°C, and then suction filtered to obtain the filtrate; Add alkaline solution to the compound filtrate to obtain the composite filtrate; add sodium sulfide to the composite filtrate, stir at a speed of 800r / min, and carry out the secondary reaction. , dried to obtain nanometer zinc sulfide. The grinding aid is ethanol; the mixing mass ratio of the ethanol to the grinding aid is 5:1.5. The grinding speed is 100r / min, and the grinding time is 2 hours. The mixing ratio of the ground zinc dust and pickling wastewater is 200g:550ml. The...

Embodiment 3

[0044] A method for preparing nano-zinc sulfide by using hot-dip galvanizing pickling waste water, mixing zinc ash produced by hot-dip galvanizing with grinding aids, then performing grinding treatment, and then drying to obtain ground zinc ash; Grinding zinc ash and pickling wastewater were reacted once in a magnetic field of a certain strength for 3.2 hours, and then left to stand for 1 hour, and then aerated for 45 minutes in a water bath at 45°C, and then subjected to suction filtration to obtain the filtrate; to the filtrate Add alkaline solution to the compound filtrate to obtain the composite filtrate; add sodium sulfide to the composite filtrate, stir at a speed of 600r / min, and perform a secondary reaction. The secondary reaction time is 30min, and then use ultrasonic treatment for 5-8min, and then perform suction filtration , cleaning, and drying to obtain nanometer zinc sulfide. The grinding aid is ethanol; the mixing mass ratio of the ethanol to the grinding aid is...

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PUM

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Abstract

The invention discloses a method for preparing nano zinc sulfide by utilizing hot galvanizing pickling wastewater, and relates to the technical field of hot galvanizing. The method comprises the following steps: mixing zinc ash generated by hot galvanizing with a grinding aid, grinding, and drying to obtain ground zinc ash; carrying out primary reaction on ground zinc ash and pickling wastewater in a magnetic field with certain strength, then standing, aerating filtrate in a water bath with a constant temperature, and then carrying out suction filtration to obtain filtrate; adding an alkalinesolution into the filtrate to obtain a composite filtrate; adding sodium sulfide into the composite filtrate, stirring, carrying out secondary reaction, then carrying out ultrasonic treatment, and then carrying out suction filtration, cleaning and drying to obtain nano zinc sulfide; the average particle size of the nano zinc sulfide obtained through the method is obviously increased, and the average particle size of the nano zinc sulfide can be further increased through ultrasonic treatment with a certain frequency and at the reaction temperature not higher than 60 DEG C.

Description

technical field [0001] The invention belongs to the technical field of hot-dip galvanizing, in particular to a method for preparing nanometer zinc sulfide by using hot-dip galvanizing pickling wastewater. Background technique [0002] Hot-dip galvanizing is to make the molten metal react with the iron substrate to produce an alloy layer, so that the substrate and the coating are combined. Hot-dip galvanizing is to pickle the steel parts first. In order to remove the iron oxide on the surface of the steel parts, after pickling, it is cleaned by ammonium chloride or zinc chloride aqueous solution or a mixed aqueous solution of ammonium chloride and zinc chloride. , and then sent to the hot-dip coating tank. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. [0003] The hot-dip galvanizing process is a water-consuming process. It produces a large amount of acidic wastewater in production, and it also contains a variety of heavy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/08B82Y30/00
CPCB82Y30/00C01G9/08
Inventor 黎福胜
Owner 和县卜集振兴标准件厂