Iron briquettes for use in the production of steel; stainless steel briquettes for use in the production of steel; agents in the field of steel making; silicon-carbon briquettes for use in the production of steel; manganese briquettes for use in the production of steel; chromium briquettes for use in the production of steel; nickel briquettes for use in the production of steel; graphite briquettes for use in the production of steel; magnesium briquettes for use in the production of steel; lim...