Method for processing and utilizing wastewater and waste material in steel production and processing system thereof

Abstract

The invention discloses a method for processing and utilizing wastewater and waste materials in steel production, which comprises the following steps: pumping the coked wastewater from a waste liquid pump into a red mud pool; generating waste materials in the shape of red mud by wet dust removal and enabling the red mud shape precipitate of the waste materials to enter the red mud pool after precipitating by a settling tank; adopting a residue slurry pump, pumping the mixture of the red mud shape precipitate in the red mud pool and the coked wastewater into a mixed stirrer and mixing and stirring together with sintering raw materials to form a sintering stirring material; and delivering the sintering stirring material to a sintering machine for sintering to form a sintering mineral aggregate. The invention also discloses a processing system executing the above method. By adopting the technical scheme, toxic substances contained in phenol-cyanogen wastewater generated by the coking process are completely recycled, wastes are comprehensively utilized, the pollution to the environment is reduced, and the aim of final removing is achieved; the use quantity of new water is reduced; and the entire process has very small occupied area, simple and reasonable process and little investment.

Description

technical field [0001] The invention belongs to the technical field of metallurgical industrial production, and relates to its coking, steelmaking and ironmaking production processes. More specifically, the invention relates to a method for treating and utilizing waste water and waste materials in iron and steel production. In addition, the present invention also relates to a processing system employing the above processing utilization method. Background technique [0002] Coking wastewater is wastewater produced during high-temperature distillation of raw coal, gas purification, and refining of chemical products. There are three main sources: one is residual ammonia water, which is produced during coal dry distillation and gas cooling. More than half of the total is the main source of coking wastewater; the second is the wastewater produced in the process of gas purification, such as gas final cooling water and crude benzene separation water; the third is in the refining pr...

AI Technical Summary

Problems solved by technology

Coking wastewater is industrial wastewater containing a large amount of refractory organic pollutants. Its composition is complex, containing a large amount of toxic and harmful substances such as phenol, cyanide, benzene, ammonia nitrogen, etc. The coking wastewater discharged beyond the standard will cause serious pollution to the environment.

[0003] At present, the wastewater containing benzene, phenol, cyanide and other harmful substances produced in the coking production process is difficult to treat and the effect is poor.

Many enterprises have installed treatment equipment, but they do not operate in order to save costs, resulting in the discharge of waste water containing a large amount of harmful substances, polluting the environment and causing damage to organisms in the water body. This part of waste water is really difficult to treat, especially some small In the coking plant, after treatment, it cannot meet the standard at all or is not treated at all

[0004] The "red mud" produced by the dust removal of the steelmaking converter has a high viscosity and the main component is Fe 2 o 3 , It is also difficult to process and form with a filter press, and the filter cloth is often blocked to cause equipment failure. Wherever the substance drips, there is a red piece, which is extremely difficult to clean up and has a great impact on the environment.

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