Abstract: Application and effect of emission-reduction and benefits increase technology of Gongchangling concentration plant of Anshan Iron and Steel Group Corporation are introduced comprehensively, technologies and measures of emission-reduction and benefits increase are introduced on improvement of ore crushing process and high-efficiency reform of crusher, whole magnetic separation flowsheet replaces magnetic separation flotation process and maximization reform of equipments of grinding, classification, screening, magnetic separation,application of high efficiency thickening and dehydration equipment and recovery of strong magnetism mineral from tailings, operation of automatic control system and so on, processing capacity of concentration plant is enhanced greatly, output of magnetite concentrate is increased, treatment cost of raw ore is reduced, emission of pollutants is reduced, economic benefit of enterprise is enhanced.

Key words: Technology reform, Maximization, Ore crushing, Grinding, Classification by screening