洁净煤技术
潔淨煤技術
길정매기술
CLEAN COAL TECHNOLOGY
2014年
4期
32-34,76
,共4页
块煤%产率%原煤性质%精中块%精小块
塊煤%產率%原煤性質%精中塊%精小塊
괴매%산솔%원매성질%정중괴%정소괴
lump coal%yield%raw coal properties%medium-sized lump coal%small lump coal
为提高龙山选煤厂块煤产率，分析了原煤性质，说明原煤属中高灰、特低硫的2号无烟煤；原生煤泥较少，矸石较硬，不易破碎解离，有明显泥化现象；块精煤灰分大于12％时，原煤可选性为易选。通过分析选煤厂工艺流程，说明滚筒筛筛分效率低，产品运输转载过程中碰撞溜槽，块煤入仓时摔碎，块煤落煤点较高等是造成选煤厂块煤产率低的主要原因。通过将滚筒筛更换为直线振动筛，在胶带机落煤溜槽内增加防破碎装置或缓冲闸板，在原煤仓内或块煤落煤点安装螺旋溜槽等措施减少块煤破碎。改造后选煤厂块煤产率提高了1.74％，其中精中块提高0.51％，精小块提高1.23％，每年增加经济效益238.68万元。
為提高龍山選煤廠塊煤產率，分析瞭原煤性質，說明原煤屬中高灰、特低硫的2號無煙煤；原生煤泥較少，矸石較硬，不易破碎解離，有明顯泥化現象；塊精煤灰分大于12％時，原煤可選性為易選。通過分析選煤廠工藝流程，說明滾筒篩篩分效率低，產品運輸轉載過程中踫撞霤槽，塊煤入倉時摔碎，塊煤落煤點較高等是造成選煤廠塊煤產率低的主要原因。通過將滾筒篩更換為直線振動篩，在膠帶機落煤霤槽內增加防破碎裝置或緩遲閘闆，在原煤倉內或塊煤落煤點安裝螺鏇霤槽等措施減少塊煤破碎。改造後選煤廠塊煤產率提高瞭1.74％，其中精中塊提高0.51％，精小塊提高1.23％，每年增加經濟效益238.68萬元。
위제고룡산선매엄괴매산솔，분석료원매성질，설명원매속중고회、특저류적2호무연매；원생매니교소，안석교경，불역파쇄해리，유명현니화현상；괴정매회분대우12％시，원매가선성위역선。통과분석선매엄공예류정，설명곤통사사분효솔저，산품운수전재과정중팽당류조，괴매입창시솔쇄，괴매락매점교고등시조성선매엄괴매산솔저적주요원인。통과장곤통사경환위직선진동사，재효대궤락매류조내증가방파쇄장치혹완충갑판，재원매창내혹괴매락매점안장라선류조등조시감소괴매파쇄。개조후선매엄괴매산솔제고료1.74％，기중정중괴제고0.51％，정소괴제고1.23％，매년증가경제효익238.68만원。
In order to increase the lump coal yield in Longshan coal preparation plant,analyze the raw coal properties.The results show that,the raw coal is medium and high ash,extra low sulfur No.2 anthracite.There is less primary slime and the gangue is harder which is difficult to crush and grind.There is obvious degradation phenomenon.When lump coal ash is above 12%,the raw coal is easy to wash.The analysis of the process flow of coal preparation plant show that,low screening efficiency,frequent collision and high drop distance lead to low lump coal yield.To resolve these problems,replace the drum screen with linear vibrating screen,the raw coal bunker or lump coal point install spiral chute and take other measures to reduce coal breakage.After transformation,the lump coal yield increase by 1. 74%,the medi-um-sized lump coal increase by 0.51%,the small lump coal increase by 1.23%,the plant creates benefits 2.3868×106 yuan per year.
