Electrode paste for graphite electrodes without hydrocarbon-based binder

摘要

Electrode paste of the nonmetallic type to obtain self-cooking Soederberg type electrodes that are not a source of carbon reduction reactions for electrothermal production in submerged arc furnaces of metal alloys, in particular ferroalloys, comprising (A) 10-90% by weight, with respect to the weight of the pulp, of a mixture formed by - anthracite and / or fine powdery graphite having a particle size of less than 0.2 mm for at least 95%, - at least one carbohydrate mixed with a solvent and / or dispersant for said carbohydrate, - optional additives in a mixture with (B) 90-10% by weight, with respect to the weight of the paste, of - one or more graffiti carbonaceous non-metallic materials which do not contain metal and / or metal oxides, consisting essentially of carbon, selected from the group consisting of fossil carbon, coke, petroleum coke, vegetable carbon and amorphous porous carbons; or - mixtures thereof with one or more graphite materials, said powder material having a particle size greater than 0.2 mm, provided that when the additives are present in (A) they are one or more additives selected from the group consisting of - inorganic additives, - organometallic additives based on P, B, Si; - stearin; - saturated, monounsaturated or polyunsaturated fatty acids; - organic acids; or - a mixture of said compounds, said additives being in a total amount comprised between 0.1% and 10% by weight with respect to the total weight of the paste and in amounts comprised between 1% and 5% when the Additive is based on metalloids and transition metals.