Development of an innovative catalyst for neutralization of carbon monoxide in multi-chamber kilns of electrode blanks

Abstract

The article outlines the possibility of achieving a comprehensive solution to environmental problems, specifically by neutralizing toxic carbon monoxide and treating wastewater generated during metallurgical production. The use of spent iron sulfate-containing etching solutions allows the creation of effective and affordable manganese-ferrite catalyst systems on a zeolite carrier. The novelty of the study is the use of "green" chemicals – ferrates that include iron (VI) and have great potential in environmentally friendly water treatment technologies. The use of potassium ferrate reduces the need for an alkaline reagent to produce a ferritic material. Confirmation of the composition of the main elements of catalysts was carried out using qualitative X-ray phase and micro-X-ray spectral analysis. The use of an innovative manganese-ferrite catalyst to neutralize carbon monoxide obtained using potassium ferrate provides a successful solution to the problem of toxic gas emission in electrode manufacturing technology and creates pathways for the transition to a circular economy. The cost-effectiveness and environmental friendliness of using the proposed catalyst on a zeolites carrier in a reactor located in the fire channels of the chambers of the Riedhammer multi-chamber furnaces for burning electrode blanks are demonstrated. The preparation of a catalyst from spent sorbents for purifying manganese-containing natural water emphasizes its sustainable nature and contribution to solving environmental problems in the context of production processes. The safety of burial or storage in landfills of ferritic sludge sediments as an analog of magnetite distributed in the earth's crust further emphasizes the importance of the proposed method