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Oxidation treatment process and system for iron and steel workpieces to achieve zero discharge of sewage

An oxidation treatment and zero-discharge technology, applied in the direction of metal material coating process, etc., can solve the problems of water resources waste, large sewage discharge, environmental pollution, etc., and achieve the effect of zero discharge of sewage and water saving.

Active Publication Date: 2019-03-26
陈衍旻
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0021] It can be seen that in the traditional oxidation treatment process of iron and steel workpieces, since tap water is used for treatment in all spraying and immersion steps, the amount of tap water used is huge, resulting in waste of water resources, which is not conducive to water conservation
Correspondingly, the discharge of sewage after all spraying and immersion with tap water is large, causing certain pollution to the environment

Method used

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  • Oxidation treatment process and system for iron and steel workpieces to achieve zero discharge of sewage
  • Oxidation treatment process and system for iron and steel workpieces to achieve zero discharge of sewage
  • Oxidation treatment process and system for iron and steel workpieces to achieve zero discharge of sewage

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Embodiment 1

[0088] see figure 2 , is a structural schematic diagram of an oxidation treatment system for iron and steel workpieces that realizes zero discharge of sewage provided by an embodiment of the present invention. The iron and steel workpiece oxidation treatment system that realizes zero discharge of sewage includes an oxidation pretreatment device 101, an oxidation main treatment device 102, and an oxidation post-treatment device 103, wherein the sewage discharged from the oxidation pre-treatment device 101 and the oxidation main treatment device 102 is passed through The sewage treatment device 104 performs sewage treatment, and the sewage treated by the sewage treatment device 104 is recycled as the water resource of the oxidation pre-treatment device 101, the oxidation post-treatment device 103 and the oxidation main treatment device 102. The oxidation pre-treatment The device 101 and the post-oxidation treatment device 103 utilize the circulating sewage as spraying and soaki...

Embodiment 2

[0092] see image 3, is a schematic flow chart of an oxidation treatment process for iron and steel workpieces to achieve zero discharge of sewage provided by an embodiment of the present invention. The iron and steel workpiece oxidation treatment process for realizing zero discharge of sewage in this embodiment includes oxidation pretreatment step S201, oxidation main treatment step S202, and oxidation posttreatment step S203, wherein, performing the oxidation pretreatment step S201 and oxidation main treatment step S202 The discharged sewage is treated through the sewage treatment step S204, and the sewage after the sewage treatment step S204 is used as the spraying and soaking in the oxidation pretreatment step S201 and the oxidation posttreatment step S203 (except for the final process of the whole process). One spraying uses tap water) and water recycling as the oxidation main treatment step S202, and the last spraying operation of the iron and steel workpiece in the post...

Embodiment 3

[0096] see Figure 4 , is a structural schematic diagram of an oxidation treatment system for iron and steel workpieces that realizes zero discharge of sewage provided by an embodiment of the present invention. The iron and steel workpiece oxidation treatment system for realizing zero sewage discharge includes an oxidation pre-treatment device 301 , an oxidation main treatment device 302 and an oxidation post-treatment device 303 . Wherein, the sewage discharged by spraying the iron and steel workpieces by the oxidation pretreatment device 301 and the sewage discharged by the oxidation post-treatment device 303 after rinsing the iron and steel workpieces are all filtered by the filter treatment device 304. The sewage filtered and treated by the device 304 forms a primary circulating sewage, and the primary circulating sewage is recycled as the water resource of the oxidation pretreatment device 301 and the oxidation main treatment device 302. Specifically, the oxidation pretre...

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Abstract

The invention discloses a steel workpiece oxidation treatment process achieving zero effluent discharge. The steel workpiece oxidation treatment process comprises the steps of oxidation pretreatment, oxidation main treatment and oxidation aftertreatment. Except tap water adopted for the last time of spraying of oxidation aftertreatment, water used for oxidation pretreatment, the rest spraying and immersion cleaning of oxidation aftertreatment, and oxidation main treatment comes from effluent discharged and processed in oxidation pretreatment and oxidation aftertreatment. In addition, the usage quantity of the tap water for the last time of spraying of oxidation aftertreatment is controlled to be equal to the water evaporation amount in oxidation main treatment. The invention further discloses a steel workpiece oxidation treatment system achieving zero effluent discharge. By performing the steel workpiece oxidation treatment process and system, water saving and zero effluent discharge can be achieved simultaneously, and the purposes of energy conservation and emission reduction are achieved in a real sense.

Description

technical field [0001] The invention relates to the technical field of metal material surface treatment, in particular to an oxidation treatment process and system for iron and steel workpieces that realize zero discharge of sewage. Background technique [0002] The steel workpiece is oxidized to form a protective oxide film on the surface. The color of the film thickness depends on the surface state of the steel workpiece, the alloy composition and the process conditions of oxidation treatment. It is generally black or blue-black. After the polished surface is oxidized , the color is bright and beautiful, and the oxide film of cast steel and special steel with higher silicon content is brown or dark brown. The thickness of the film layer is about 0.6-1.6μm, so the oxidation treatment will not affect the precision of the parts. [0003] The alkaline oxidation method is carried out in a sodium hydroxide alkali solution containing a certain oxidizing agent at a relatively hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/76C23C22/00
CPCC23C22/00C23C22/76
Inventor 陈衍旻
Owner 陈衍旻