关键词: 粗粒预选抛废, 重介质旋流器, 跳汰机, 能抛早抛多抛, 节能减排, 降本增效, 药剂污染风险

Abstract: Metallic and nonmetallic ore resources are crucial foundation resource for national econo⁃ my and society development. Mature and high-efficient coarse grained pre-selection discarding technology is a powerful method to achieve highly efficient，low cost，green development for large amount ores resourc⁃ es in China with characteristics of poor，complex，fine，thin and loose. In order to promote the rational ap⁃ plication of pre-selection discarding technology for coarse grain with gravity，aiming at common gravity coarse preconcentration and waste disposal equipment，the working principle，advantages and disadvantag⁃ es of heavy media cyclone and jigging machine of were analyzed based on the brief introduction of the sig⁃ nificance of gravity coarse preconcentration and waste disposal. The technology research and practice situa⁃ tion of gravity coarse pre-separation and waste disposal for single ores such as lithium，tungsten，manga⁃ nese，iron and phosphorus and polymetallic ores such as copper，lead，zinc，tin，tantalum and niobium are introduced in detail. Finally，some suggestions are given for determining the waste disposal degree com⁃ prehensively，accurately and systematically.

Key words: pre-selection discarding for coarse grain, dense medium cyclone, jigging machine, dis? carding earlier and more considering capacity, energy conservation and emission reduction, cost decreasing and benefit increasing, risk of reagents contamination