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A kind of water treatment process method of electric furnace steelmaking pure water circulation system

A technology of electric furnace steelmaking and process method, which is applied in the directions of water/sewage multi-stage treatment, water/sludge/sewage treatment, sterilization/microdynamic water/sewage treatment, etc., which can solve the problem of poor water treatment effect and reduced corrosion inhibition Dosage of chemicals, difficulty in water system operation control, etc.

Active Publication Date: 2015-12-30
TIANJIN ZHENGDA SCI &TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a water treatment process for the electric furnace steelmaking pure water circulation system, so as to overcome the shortcomings of the existing technology, such as poor water treatment effect and difficult daily operation control of the water system
In this way, the original electric furnace steelmaking pure water system has to reduce the amount of corrosion inhibitor and sacrifice the corrosion inhibition effect to control the water body conductivity due to the strict upper limit requirement on the conductivity of circulating water in the original electric furnace steelmaking pure water system.

Method used

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  • A kind of water treatment process method of electric furnace steelmaking pure water circulation system

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Experimental program
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Embodiment 1

[0026] Corrosion inhibitors are prepared according to the following weight percentages:

[0027] Polyepoxysuccinic acid 10% (commercially available liquid preparation, polymerization degree is 4-10, solid content is 40%), acrylic acid / hydroxypropyl acrylate / maleic anhydride / 2-acrylamide-2-formaldehyde Propanesulfonic acid tetrapolymer 2%, sodium citrate 2%, sodium molybdate 10% are placed in airtight or pressure container, under stirring condition, the condition scope of controlling reaction temperature is 60 ℃ (controlling reaction temperature is 55 ℃ ), control the pressure to 0.1Mpa, add borax 8%, water 67.9%, stir evenly, then add 0.1% benzotriazole, keep 60°C, stir until completely dissolved, and obtain light yellow pure Corrosion inhibitor I for water circulation systems.

Embodiment 2

[0029] Corrosion inhibitors are prepared according to the following weight percentages:

[0030] Polyepoxysuccinic acid 6% (commercially available liquid preparation, polymerization degree is 4-10, solid content is 40%), acrylic acid / hydroxypropyl acrylate / maleic anhydride / 2-acrylamide-2-formaldehyde 2% propanesulfonic acid tetrapolymer, 3% potassium laurate, and 12% potassium molybdate are placed in a closed or pressure vessel, under stirring conditions, the condition range of the reaction temperature is 50°C, and the control pressure is 0.1Mpa. Add 10% borax, 66.8% water, stir evenly, then add 0.2% mercaptobenzoxazole, keep at 50°C, stir evenly until completely dissolved, and obtain a colorless corrosion inhibitor suitable for electric furnace steelmaking pure water circulating water system II.

Embodiment 3

[0032] Prepare fungicides by the following weight percentages:

[0033] Place 20% of chlorhexidine acetate (commercially available, chlorhexidine acetate) in an airtight or pressure vessel, under stirring conditions, the range of conditions for controlling the reaction temperature is 40 to 50°C, and the control pressure is 0.1Mpa. Add 55% isopropanol, 5% isothiazolinone, and 20% glutaraldehyde, stir until completely dissolved, and obtain a yellow-green fungicide I suitable for electric furnace steelmaking pure water circulating water system.

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Abstract

The invention relates to a water treatment process for the pure water circulation system of electric furnace steelmaking, which is characterized in that a corrosion inhibitor and a bactericide are applied to the pure water circulation cooling water system of electric furnace steelmaking, and the corrosion inhibitor is added to the water system Agents and fungicides, use the synergistic effect between the components of the corrosion inhibitor, and the synergistic effect of corrosion inhibition with the fungicide to reduce the amount of use and improve the corrosion inhibition effect. It solves the problem that the original electric furnace steelmaking pure water system has a strict upper limit requirement on the conductivity of circulating water, so the dosage of corrosion inhibitor has to be reduced, and the corrosion inhibition effect is sacrificed to control the conductivity of water body.

Description

technical field [0001] The invention belongs to the technical field of circulating cooling water treatment, and in particular relates to a water treatment process for an electric furnace steelmaking pure water circulation system. Background technique [0002] A large amount of cooling water is required in the production of electric furnace continuous casting, which can generally be divided into two parts: one is indirect cooling water, which is mainly used for equipment cooling (including electric furnace shell, furnace cover, flue, bottom electrode, hydraulic air conditioner and auxiliary equipment) and the initial cooling of the crystallizer; the second is direct cooling water, also known as secondary cooling spray, which is used to cool the ladle water-shaped steel billet that has been initially cooled by the crystallizer. [0003] In indirect equipment cooling, due to the particularity of conductive materials such as water-cooled steel rod bottom electrodes, short mesh c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F5/08C02F5/10C02F5/12C02F1/50A01N47/44A01P1/00C02F103/16
CPCC23F11/173C23F11/08
Inventor 马景辉刘家节顿士超肖知吴新国姜宝安王乃琳
Owner TIANJIN ZHENGDA SCI &TECH CO LTD
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