CATALYTIC NEUTRALIZATION OF CARBON MONOXIDE IN KILNS OF RIEDHAMMER TYPE

Abstract

The article considers the possibility of complex solution of complex ecological problem of neutralization of toxic gases and purification of waste waters of metallurgical production by means of use of spent iron-sulphate-containing pickling solutions for creation of effective, accessible and economically expedient manganese-ferrite catalytic systems on zeolite carrier. The novelty of the study is the use of “green” chemical compounds – ferates, which include iron (VI) and have significant potential for use in environmentally friendly water treatment technologies. The use of potassium ferate reduces the need for alkaline reagents to produce a ferrite material. Manganese-ferrite catalyst used to neutralize carbon monoxide obtained through the use of potassium ferate contributes to the effective solution of the problem of toxic gas emissions from the production of electrodes and creates the basis for the transition to a circular economy. The cost-effectiveness and environmental friendliness of using a zeolite-based catalyst in a reactor located in the fire channels of the chambers of Riedhammer furnaces for burning electrode blanks is justified by the fact that the catalyst is made of spent sorbents for purifying manganese-containing natural water. In turn, the deposit of ferrite sludge is suitable for safe storage or burial in landfills, which is due to its similarity to the magnetite common in the earth’s crust.