Anti-scab anticorrosion method for circular washing liquor pipe based on liquid steel slag stew process

A technology of liquid steel slag and washing liquid pipe, which is applied in the field of metallurgy, can solve the problems of pipeline corrosion, production operation, pipeline scarring, etc., and achieve the effects of improving service life, preventing scarring, and intensifying corrosion

Active Publication Date: 2010-02-17
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to solve the problem of scarring of steel slag treatment circulating washing liquid pipeline, and defects such as pipeline corrosion in traditional methods that affect production and operation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] In the liquid steel slag hot stewing method circulating washing liquid pipeline, the water temperature in the return well is 25 °C, and the Ca in the washing liquid 2+ , Mg 2+ The original concentration was 0.42g / L. The injection device is set in the backwater well, the injection device includes a spray gun and a stirring paddle, the spray gun and the stirring paddle are inserted into the circulating washing liquid in the returning water well, and CO is injected into the circulating washing liquid through the spray gun. 2 Gas, spray gun injection CO 2 The speed is 0.5m 3 / min, start the stirring paddle at the same time, and the paddle speed is 50rpm.

[0016] Set up a settling chamber between the backwater well or the backwater well and the water pump to receive the precipitate generated by the reaction. After spraying and sedimentation treatment, Ca of the circulating washing liquid entering the pump pipeline 2+ , Mg 2+ The total ion concentration is 105mg / L.

Embodiment 2

[0018] In the liquid steel slag hot stewing method circulating washing liquid pipeline, the water temperature in the return well is 50 °C, and the Ca in the washing liquid 2+ , Mg 2+ The original concentration was 0.42g / L. The injection device is set in the backwater well, the injection device includes a spray gun and a stirring paddle, the spray gun and the stirring paddle are inserted into the circulating washing liquid in the returning water well, and CO is injected into the circulating washing liquid through the spray gun. 2 Gas, spray gun injection CO 2 The speed is 1.2m 3 / min, start the stirring paddle at the same time, the paddle speed is 100rpm.

[0019]Set up a settling chamber between the backwater well or the backwater well and the water pump to receive the precipitate generated by the reaction. After spraying and sedimentation treatment, Ca of the circulating washing liquid entering the pump pipeline 2+ , Mg 2+ The total ion concentration is 133mg / L.

Embodiment 3

[0021] In the liquid steel slag thermal stewing method circulating washing liquid pipeline, the water temperature in the return well is 90°C, and the Ca in the washing liquid 2+ , Mg 2+ The original concentration was 0.42g / L. The injection device is set in the backwater well, the injection device includes a spray gun and a stirring paddle, the spray gun and the stirring paddle are inserted into the circulating washing liquid in the returning water well, and CO is injected into the circulating washing liquid through the spray gun. 2 Gas, spray gun injection CO 2 The speed is 5.0m 3 / min, start the stirring paddle at the same time, the paddle speed is 200rpm.

[0022] Set up a settling chamber between the backwater well or the backwater well and the water pump to receive the precipitate generated by the reaction. After spraying and sedimentation treatment, Ca of the circulating washing liquid entering the pump pipeline 2+ , Mg 2+ The total ion concentration is 184mg / L.

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Abstract

The invention relates to an anti-scarring and anticorrosive method for a circulating lotion pipeline based on the liquid steel slag heat-stewed method, which belongs to the technical field of metallurgy. The method is to blow CO2 gas to circulating lotion in a recharging well of a liquid steel slag heat-stewed system, to stir the circulating lotion in the recharging well, to perform micronizationtreatment on CO2 bubbles in the circulating lotion, and to arrange a settling chamber inside the recharging well or between the recharging well and a water pump simultaneously to receive deposits absorbed by the CO2. The method has the advantages that the method can effectively avoid corrosion and scarring in the circulating lotion pipeline and prolongs the service life of the pipeline, and is simple and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for preventing scabbing and anti-corrosion of circulating washing liquid pipelines based on liquid steel slag thermal braising method Background technique [0002] The production rate of steel slag is about 15% of the amount of crude steel. The annual output of steel slag in my country is nearly 100 million tons. It is discarded as waste, which not only occupies fertile land, but also pollutes the environment. The main chemical components of steel slag are CaO, SiO 2 , MnO, MgO, Al 2 o 3 , TFeO, P 2 o 5 etc. Some steel slags also contain TiO 2 and V 2 o 5 Wait. In order to adapt to the development of the iron and steel industry, extensive research has been carried out on the comprehensive utilization of steel slag at home and abroad, and remarkable results have been obtained. The biggest restrictive factor for the comprehensive utilization of stee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B3/06C04B5/00
CPCY02W30/50
Inventor 张廷安豆志河刘燕郝树满蒋孝丽赫冀成
Owner NORTHEASTERN UNIV LIAONING
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