Method for processing wastewater containing carbonyl iron

Abstract

A method for treating the waste water containing carbonyl iron is provided, which relates to a method for treating the waste water containing carbonyl iron which is generated during the production process of carbonylation metallurgy. The invention is characterized by the treatment process that: hydrogen peroxide is taken as oxidant and added into the waste water containing carbonyl iron to oxidize carbonyl iron in the waste water into solid iron oxide to be separated, thereby disinfecting and treating the waste water containing carbonyl iron and recycling valuable iron metal in the waste water. The method for treating the waste water containing carbonyl iron of the invention is suitable for waste water with volume percentage of carbonyl nickel more than 65 percent. Oxidation-reduction reaction is carried out between 30 percent to 50 percent of hydrogen peroxide and the carbonyl iron in the waste water to disinfect and treat the waste water so as to realize standard discharge and recycle valuable metals in the residue. Compared with the traditional technology, the invention has good disinfection effect and no pollutant during the treatment process and is environment friendly. The reaction product is solid iron oxide which is mainly Fe2O3 and can be recycled after being cleaned.

Description

technical field [0001] The invention discloses a method for treating waste water containing iron carbonyl, relating to a treatment method for waste water containing iron carbonyl produced in carbonylation metallurgical production process. Background technique [0002] In the carbonylation metallurgical production process, waste water containing a small amount of carbonyl iron is unavoidable. These waste water must be disinfected before they can be discharged up to standard and eliminate environmental pollution. According to published information, there is no good disinfectant suitable for For the treatment of wastewater containing carbonyl iron, some data show that a certain concentration of hydrochloric acid in the laboratory can form a complex with carbonyl iron under the condition of a catalyst, but it is limited to laboratory reactions, and there is no case of industrial application. In the current gasification carbonyl iron production process, concentrated nitric acid r...

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Problems solved by technology

[0002] In the carbonylation metallurgical production process, waste water containing a small amount of carbonyl iron is unavoidable. These waste water must be disinfected before they can be discharged up to standard and eliminate environmental pollution. According to published information, there is no good disinfectant suitable for For the treatment of wastewater containing carbonyl iron, some data show that a certain concentration of hydrochloric acid in the laboratory can form a complex with carbonyl iron under the condition of a catalyst, but it is limited to laboratory reactions, and there is no case of industrial application

In the current gasification carbonyl iron production process, concentrated nitric acid reacts with carbonyl iron for disinfection treatment. Due to the low concentration of carbonyl iron in the wastewater, the concentrated nitric acid is diluted, and the treatment effect is not good. At the same time, the nitric acid produced during the treatment process Decomposition reaction, the nitrogen oxides produced will pollute the environment, and the iron metal contained in the reaction product is also inconvenient to recycle