Converter turbid circulating water treatment method utilizing superconductive high-gradient magnetic field

Abstract

The invention relates to a converter turbid circulating water treatment method utilizing a superconductive high-gradient magnetic field, belonging to the fields of environmental protection and treatment of industrial waste water difficult to treat. The method is characterized in that under a superconductive high-gradient magnetic field, converter turbid circulating water is treated by using an inclined board settling basin and a high-gradient treater; the strong magnetization and strong adsorption effects of the superconductive high-gradient magnetic field can be used for adsorbing strongly magnetic ferric oxide substances in waste water and also can be used for adsorbing weakly magnetic substances and even nonmagnetic substances, such as calcium oxide, silicon dioxide, magnesium oxide, and the like; the suspended particle density of the treated waste water is reduced to 5mg / L from 1,216mg / L, the turbidity is reduced to 22.25 NTU from 2873.5 NTU, and the two indexes both reach the national emission standard; meanwhile, the superconductive high-gradient magnetic field can be used for adsorbing small particulate substances with the particle diameters below 100nm; and the average particle diameter of particles in the waste water is reduced to 1.272 mu m from 6.431 mu m. The invention has the advantages of low running cost, easy realization of automatic control, energy saving and consumption reduction.

Description

technical field [0001] The invention relates to a treatment method for iron and steel industry wastewater, which belongs to the field of environmental protection and refractory industrial wastewater treatment. It is suitable for converter turbid ring water with more ferromagnetic substances and high suspended matter content produced in the steelmaking process, and can efficiently reduce suspension. content and turbidity. Background technique [0002] A large amount of flue gas will be produced in the steelmaking process, which contains a large amount of gas and some harmful substances such as phenol, cyanide, carbon monoxide and solid impurities. Steelmaking needs to add lime (CaO), a slagging agent, and some lime powder is covered by the flue gas. During the cooling and washing process of the flue gas, it enters into the water due to the contact of water vapor, and becomes the converter flue gas washing sewage. Converter turbid ring water has the characteristics of high te...

AI Technical Summary

Problems solved by technology

Under such water quality conditions, the system has a strong scaling tendency, which puts forward higher requirements for water treatment technology. If the water is not treated properly, scaling and blockage will occur in the key equipment parts of the system, seriously affecting the normal operation of production.

At present, the flocculation and sedimentation method is generally used to treat the turbid ring water of the converter, and flocculants need to be added. The equipment is more complicated and the cost is higher.

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