洁净煤技术
潔淨煤技術
길정매기술
Clean Coal Technology
2015年
5期
42-44,48
,共4页
筛网旋流器%粗精煤泥%高灰细泥%分级效率
篩網鏇流器%粗精煤泥%高灰細泥%分級效率
사망선류기%조정매니%고회세니%분급효솔
screen cyclone%coarse clean coal slime%high-ash fine slime%classification efficiency
针对泉店选煤厂粗煤泥回收系统中浓缩旋流器分级效果差,高灰细泥污染粗精煤等问题,采用筛网旋流器代替浓缩旋流器+高频筛组合对选煤厂进行改造,研究了筛网旋流器直径、入料口尺寸、溢流管直径、入料压力、入料浓度等因素对筛网旋流器分级效果的影响,并进行了筛网旋流器的工业应用试验. 结果表明,筛网旋流器入料灰分高达19. 78%,>0. 125 mm粗颗粒产率为70. 90%,粗颗粒比例大,浓度高,浓缩旋流器无法满足粗煤泥回收要求. 改造后筛网旋流器底流中>0. 125 mm粗颗粒产率为86. 90%,灰分达到10. 47%. 筛网溢流和筛下水灰分分别为20. 92%和21. 56%,其中>0. 5 mm浮选难以回收的粗颗粒仅占0. 30%,有利于浮选机的回收.
針對泉店選煤廠粗煤泥迴收繫統中濃縮鏇流器分級效果差,高灰細泥汙染粗精煤等問題,採用篩網鏇流器代替濃縮鏇流器+高頻篩組閤對選煤廠進行改造,研究瞭篩網鏇流器直徑、入料口呎吋、溢流管直徑、入料壓力、入料濃度等因素對篩網鏇流器分級效果的影響,併進行瞭篩網鏇流器的工業應用試驗. 結果錶明,篩網鏇流器入料灰分高達19. 78%,>0. 125 mm粗顆粒產率為70. 90%,粗顆粒比例大,濃度高,濃縮鏇流器無法滿足粗煤泥迴收要求. 改造後篩網鏇流器底流中>0. 125 mm粗顆粒產率為86. 90%,灰分達到10. 47%. 篩網溢流和篩下水灰分分彆為20. 92%和21. 56%,其中>0. 5 mm浮選難以迴收的粗顆粒僅佔0. 30%,有利于浮選機的迴收.
침대천점선매엄조매니회수계통중농축선류기분급효과차,고회세니오염조정매등문제,채용사망선류기대체농축선류기+고빈사조합대선매엄진행개조,연구료사망선류기직경、입료구척촌、일류관직경、입료압력、입료농도등인소대사망선류기분급효과적영향,병진행료사망선류기적공업응용시험. 결과표명,사망선류기입료회분고체19. 78%,>0. 125 mm조과립산솔위70. 90%,조과립비례대,농도고,농축선류기무법만족조매니회수요구. 개조후사망선류기저류중>0. 125 mm조과립산솔위86. 90%,회분체도10. 47%. 사망일류화사하수회분분별위20. 92%화21. 56%,기중>0. 5 mm부선난이회수적조과립부점0. 30%,유리우부선궤적회수.
To improve efficiency of concentrated cyclone,avoid coarse clean coal pollution by high-ash fine slime,the screen cyclone was used to replace the combination of high frequency sieve and enrichment cyclone in Quandian coal preparation plant. The effects of screen cyclone diameter,size of feeding inlet,diameter of overflow pipe,pressure and concentration of feeding material on mesh cyclone classifica-tion effect was studied. The industrial application test of mesh cyclone was conducted. The results indicated that the ash content was 19. 78%,the proportion of particle large than 0. 125 mm was 70. 90%,the proportion of coarse particle was large and the concentration was high,all of these made the enrichment cyclone couldn't meet the recovery requirements of coarse coal slime. The effects of feeding ma-terial concentration and particle properties on the screen mesh cyclone was studied. The results showed that the classification effects de-creased with the increase of material concentration,the slurry viscosity and the content of slime. After transformation,the proportion of par-ticles large than 0. 125 mm in bottom stream was 86. 90%,most of the coarse particle was removed and the ash content was 10. 47%. The ash content of overflow and underflow were 20. 92% and 21. 56% respectively. High ash fine slime was given into floatation system,the particle which was larger than 0. 5 mm accounted for 0. 30%,which was easy to be cycled by flotation machine.
