The " Research and Application of ISP Thick Layer Sintering Technology" is a scientific and technological achievement accomplished by Zhongjin Lingnan Shaoguan Smelter and Central South University. Experts believe that the project is aimed at a large number of mixed lead-zinc concentrates and miscellaneous materials in the sintering production process of Shaoguan smelter, through a series of technical measures such as improving cylinder operating parameters, main silo structure, and adopting tail gas return smoke. , improve the mixture of material permeability. The sintering of thick material layer (460mm) was realized without changing the height of the screed plate of the sinter machine , which increased the sintering capacity and achieved better economic and environmental benefits. Through the implementation of thick layer sintering technology, the ratio of mixed lead-zinc concentrates and miscellaneous materials is increased to 60 % to 65 %, and the effective sintering rate is stabilized at 22 %, which reduces the emission of low-level SO2 fumes. Experts believe that the results have been successfully applied to the ISP sintering process, a breakthrough in technology, and are at the international advanced level.