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Russian ferroalloy plants, faced with a shortage of coking coal, need to find alternative carbon sources. The influence of the physicochemical properties of long flame coal and lignite on the reduction of silicon and manganese is investigated. Thanks to the volatile components liberated on heating the coal, solid phase reduction of the higher oxides of manganese occurs at lower temperatures, which hastens reduction. Development of the specific surface of the pyrolytic residue from the coal facilitates the reduction of silicon.

Kinetic studies of hydrogen absorption by porous nickel catalyst establish that there are three regions on kinetic curves of the process differing in their regularities of adsorption. The dependence of the observed rate of hydrogen absorption on the adsorbate amount is formally described by a first order kinetic equation, and the absorption rate constants corresponding to distinct parts of the kinetic curve differ by 1⎯2 orders of magnitude. The obtained data are explained using the concept that hydrogen adsorption on nickel active centers proceeds with three forms of adsorption.