本文關(guān)鍵詞： 煉焦中煤 尺度效應 浮選　出處：《煤炭學報》2016年02期 　論文類型：期刊論文

【摘要】：為了考察煤泥粒度變細對浮選效果的影響,從不同細度顆粒的幾何特征、潤濕熱及浮選行為3方面探討了煉焦中煤的尺度效應。使用BET比表面測定儀、微量熱儀分別研究了煉焦中煤粒度減小對其比表面積、總孔容和平均孔徑及潤濕熱的影響,用Young-Laplace方程分析了基于毛細管作用捕收劑吸附的變化,通過半經(jīng)驗公式計算了顆粒粒徑及潤濕性對上浮概率的影響,并進行了不同細度超低灰精煤的浮選試驗。研究表明,隨著煉焦中煤粒度的變細,其比表面積和總孔容呈數(shù)倍增大,Ⅱ類孔增多,平均孔徑增加;基于毛細管作用的捕收劑吸附增強,對去離子水的潤濕熱值急劇降低;存在最佳粒度范圍使顆粒的上浮概率最大,中等紊流強度的浮選環(huán)境中,控制疏水顆粒粒徑在-200+45μm或親水性顆粒粒徑在-10μm或+45μm均可強化浮選回收。相同浮選藥劑條件下,煤泥粒度越細,煤的回收率越難以保障,并且水回收率呈增加趨勢,浮選效率降低。
[Abstract]:In order to investigate the effect of coal slime granularity on flotation effect, the scale effect of coal in coking was discussed from three aspects: geometric characteristics of different fineness particles, moist heat and flotation behavior. BET specific surface tester was used to measure the size of coal in coking process. The effects of coal particle size reduction in coking on specific surface area, total pore volume, average pore size and wetting heat were studied by microcalorimeter. The change of collector adsorption based on capillary action was analyzed by Young-Laplace equation. The effects of particle size and wettability on the floating probability were calculated by semi-empirical formula, and the flotation tests of ultra-low ash concentrate with different fineness were carried out. The specific surface area and total pore volume increased several times, the type 鈪，

本文編號：1496743