关键词: 制盐废渣；石膏；脱盐；综合利用

Abstract: The waste residues produced in the production process of salt?鄄making area include the first grade and second grade residues from brine purification.The residues are in large volume and with complicated composition.These residues are piled up in the plant area，which has a large impact on environment.Taking the waste residues of Shuping salt?鄄making area in Zigongas the research object，through the analysis and detection of the composition of several kinds of residues，the downstream application market was investigated according to the characteristics of the residues，and the indoor desalination and comprehensive utilization experiments were carried out accordingly.After dewatering and drying，w（Cl-）＜0.35% and w（H2O）＜12% in the first grade and second grade residues washed twice by condensate water，which could be used as additives in cement production.The comprehensive utilization of waste residues achieved with remarkable environmental protection benefits and it could be widely applied in various salt making enterprises.

Key words: salt?鄄making waste residues；gypsum；desalination；comprehensive utilization