Calcium carbide and preparation method thereof, and method for recycling and comprehensively utilizing waste liquid generated in production of sodium carbonate by using ammonia-soda process

• Main Authors: ZHOU YOULIAN, WANG CHAO, HUANG LEIMING
• Format: Patent
• Language: Chinese; English
• Published: 27.02.2024
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS

The invention relates to the technical field of chemical materials, and particularly discloses calcium carbide and a preparation method thereof, and a method for recycling and comprehensively utilizing waste liquid generated in sodium carbonate production through an ammonia-soda process. The preparation method specifically comprises the following steps: mixing calcium chloride in the waste liquid of sodium carbonate produced by an ammonia-alkali method with sodium silicate, then respectively adding the mixture and a starch binder into a calcium carbide forming raw material for mixing and forming, and pyrolyzing to prepare calcium carbide. According to the technical scheme provided by the invention, the strength of raw blocks formed by mixing non-caking coal or weakly-caking coal and quicklime powder and the strength of calcium carbide blocks obtained after pyrolysis can be improved, and meanwhile, calcium chloride in the waste liquid generated by producing sodium carbonate by using an ammonia-soda process is