化工进展2025，Vol.44Issue(3)：1749-1757,9.DOI:10.16085/j.issn.1000-6613.2024-0400
煤气化渣提炭分质用于橡胶补强填充料
Separation of residual carbon and slag particles from coal gasification slag for rubber reinforcement fillers
摘要
Abstract
The separation of residual carbon and slag particles from coal gasification slag is a key prerequisite for its extraction and utilization.This paper studied different types of carbon-rich and slag-rich products obtained by using sieving,airflow classification and acid washing/calcining methods.The characterization of carbon and slag in the products was discussed and their reinforcing and filling properties for rubber as fillers were investigated.The results showed that the carbon-rich or slag-rich products obtained by different methods had different properties.Sieving could realize a certain degreed of separation of carbon in gasification slag.Airflow classification could obtain carbon-rich particles with smaller particle size and larger specific surface area.High purity of carbon and slag was obtained from acid washing and calcining.The large specific surface area of the residue carbon in coal gasification slag provided abundant contact sites for its combination with rubber,which played a reinforcing effect similar to carbon black.The microsphere particles in the carbon skeleton could reduce the adsorption of sulfidation accelerators and sulfidation agents,and shorten the curing time.Calcium sulfate in gasification slag could promote the generation and transfer of active sulfur and increase the crosslinking density of rubber compound.Compared with rubber composites without fillers,rubber filled with gasification slag could significantly improve the mechanical properties of rubber composites.Among them,the carbon-rich slag obtained from airflow classification had the best reinforcing properties after filling,the tensile strength of the prepared rubber composites was increased to 13.92MPa,and the 300%modulus was 3.75MPa,which were better than other types of carbon-rich or ash-rich raw materials.This study improved the understanding of the properties of carbon and slag of the gasification slag,and contributes to the development of the technology for the preparation of gasification slag-based rubber reinforcing fillers.关键词
煤气化渣/炭灰分离/筛分/气流分级/橡胶填料Key words
coal gasification slag/separation of carbon and slag/sieve/airflow classification/rubber filler分类
化学化工引用本文复制引用
王奇,张乾,杨凯,高晨明,孙岳鹏,黄伟..煤气化渣提炭分质用于橡胶补强填充料[J].化工进展,2025,44(3):1749-1757,9.基金项目
国家重点研发计划(2020YFB0606304). （2020YFB0606304）
