Preparation of high mechanical strength bituminous briquette with modified humic acid
ZHENG Keli
NIU Yu
OU Yangying
Abstract：In order to improve the mechanical strength of bituminous briquette,the modified humic acid was adopted as binder.The influ-ence of heating time and temperature,mass fraction of NaOH,humic acid addition on compressive strength and dropping strength of bri-quette was investigated through the single element experiment and orthogonal experiment.The results showed that the modified briquette had better mechanical strength,the briquetting ratio of fine coal was high.The main influencing factor was humic acid addition,followed by mass fraction of NaOH,heating time and temperature.The optimum technological condition was that the heating time was 130 minutes,the mass fraction of NaOH was 6%,the heating temperature was 90 ℃ ,the addition of modified humic acid was 15%.Under the optimum con-dition,the compressive strength and dropping strength of briquette was 1620.2 N,99.0%.The bituminous briquette bonded by modified hu-mic acid was suitable for industrial production.
Keywords：humic acidbituminous briquettemodificationcompressive strengthdropping strength
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 56-59 )