Preparation and performance of briquette from lignosulfonate
Briquettes are an important component of clean coal technology.Cheap,low ash coal adhesive is the key technology of briquette production.An adhesive was prepared using lignosulfonate,which is produced as a raw material in the papermaking industries,and was applied to coal briquetting.This new method of recycling lignosulfonate is of great significance.The morphology and elemental composition of lignosulfonate was characterized by a scanning electron microscope and element analysis.The technological parameters for coal briquetting were optimized.Tests for measuring abrasion,drench,and soak resistances,and combustion performance of the briquette were performed.Results indicate that lignosulfonate exists in a granular aggregate state,and the optimum mass ratio for lignosulfonate adhesives of water:lignosulfonate:NaOH is 39∶10∶1.For coal briquetting,the adhesive-coal ratio is 9 ∶ 50 and the ratio of height-to-diameter for a briquette is 1 ∶ 1.Under 20 MPa for 10 minutes,shatter strength of the briquette was over 95％ and abrasion resistance was above 90％.Ash patterns and CO2 emissions prove that the combustion efficiency of the briquette was significantly improved.Moreover,the emission concentrations of NOx and CO were significantly reduced,which is beneficial to energy saving and environmental protection.
国家科技期刊平台
NSTL
万方数据
维普
