The tanning process using REs andchrome is based on partial substitutionof REs For red vitriol.Experimental re-sults showed that the consumption of redvitriol reduced by 1/3 and chrome con-tent in the waste liquid dec...The tanning process using REs andchrome is based on partial substitutionof REs For red vitriol.Experimental re-sults showed that the consumption of redvitriol reduced by 1/3 and chrome con-tent in the waste liquid decreased by80-90%,as compared with the traditionalprocess.In leather dyeing,the additionof REs increases the effect of collagenfibre on the absorption combination pro-展开更多
By analyzing the characteristics and the production mechanism of rock burstthat goes with abnormal gas emission in deep coal seams,the essential method of eliminatingabnormal gas emission by eliminating the occurrence...By analyzing the characteristics and the production mechanism of rock burstthat goes with abnormal gas emission in deep coal seams,the essential method of eliminatingabnormal gas emission by eliminating the occurrence of rock burst or depressingthe magnitude of rock burst was considered.The No.237 working face was selected asthe typical working face contacting gas in deep mining;aimed at this working face,a systemof rock burst prediction and control for coal seam contacting gas in deep mining wasestablished.This system includes three parts:① regional prediction of rock burst hazardbefore mining,② local prediction of rock burst hazard during mining,and ③ rock burstcontrol.展开更多
文摘The tanning process using REs andchrome is based on partial substitutionof REs For red vitriol.Experimental re-sults showed that the consumption of redvitriol reduced by 1/3 and chrome con-tent in the waste liquid decreased by80-90%,as compared with the traditionalprocess.In leather dyeing,the additionof REs increases the effect of collagenfibre on the absorption combination pro-
基金Supported by the National Natural Science Foundation(Instrument)of China(50427401)the National High Technology Research and Development Program of China(2006AA06Z119)+1 种基金the National Key Technology R&D Program in 11th Five Years Plan of China(2007BA29B01)the New Century Excellent Talents in University(NCET-06-0477)
文摘By analyzing the characteristics and the production mechanism of rock burstthat goes with abnormal gas emission in deep coal seams,the essential method of eliminatingabnormal gas emission by eliminating the occurrence of rock burst or depressingthe magnitude of rock burst was considered.The No.237 working face was selected asthe typical working face contacting gas in deep mining;aimed at this working face,a systemof rock burst prediction and control for coal seam contacting gas in deep mining wasestablished.This system includes three parts:① regional prediction of rock burst hazardbefore mining,② local prediction of rock burst hazard during mining,and ③ rock burstcontrol.
