本文選題：捕收劑 + 合成工藝　； 參考：《武漢理工大學》2015年碩士論文

【摘要】：目前國內針對提鐵降硅的反浮選主要有兩種工藝,一為陰離子反浮選工藝,其優(yōu)點是流程穩(wěn)定,產品指標好;缺點是選礦時需要加溫,提高了選礦成本。二為陽離子反浮選工藝,優(yōu)點是藥劑制度簡單,可在常低溫下進行浮選,產品指標好;缺點是流程不穩(wěn)定,泡沫難消,易跑槽,阻礙正常生產。本課題針對陽離子反浮選工藝存在的問題,在現(xiàn)有的陽離子捕收劑GE-609的基礎上,選用異構脂肪醇和丙烯腈為合成藥劑原料,并改進藥劑合成工藝,生產出新型陽離子捕收劑GE-609T。通過工藝條件試驗,確定合成醚胺(單胺醚)的最佳工藝條件為:(1)氰乙基化反應脂肪醇與丙烯腈藥劑摩爾比為1∶1.05,催化劑KOH用量為脂肪醇用量的4.50‰,溫度為45℃左右,反應時間為3h;(2)加氫還原反應催化劑用量為給料量的4.00‰,高壓釜溫度為150℃左右,高壓釜的壓力為2.5~3.0MPa。以醚胺和丙烯腈為原料合成二胺醚的最佳工藝條件為:(1)氰乙基化反應醚胺與丙烯腈藥劑摩爾比為1∶1.1,催化劑KOH用量為醚胺用量的4.00‰,反應溫度為45℃左右,反應時間為2.5h;(2)加氫還原反應催化劑用量為醚腈給料量的4.00‰,高壓釜溫度為140℃左右,高壓釜的壓力為2.5~3.0MPa。將GE-609T與GE-609以及十二胺進行藥劑對比試驗,結果顯示,以GE-609T作為捕收劑的浮選指標最佳,精礦品位為60.49%;同時測定浮選泡沫量結果顯示,GE-609T的泡沫量僅為十二胺的50%,且試驗過程中其泡沫易消;相比于GE-609T,在指標一致的情況下,GE-609T的用量降低約20%。以合成藥劑GE-609T為捕收劑針對酒鋼焙燒磁精礦進行浮選試驗,在最佳藥劑制度以及一粗一精三反的流程條件下,開路精礦鐵品位達到67.27%,回收率為73.52%;閉路產品中精品位66.50%、回收率89.06%。又針對廟溝鐵礦進行浮選試驗,在最佳藥劑制度以工藝流程條件下,開路浮選鐵精礦品位70.73%,回收率為82.87%。閉路試驗結果為:精礦品位69.52%、回收率96.73%,浮選指標優(yōu)良。通過本課題的研究,成功合成出一種適用于鐵礦反浮脫硅的新型捕收劑GE-609T,該捕收劑捕收性強,分選效果明顯,可在室內外常溫下應用,浮選效率快,產品指標好,浮選泡沫易消去,藥劑用量少,有效的降低了工藝成本。
[Abstract]:At present, there are two main reverse flotation processes in China, one is anionic reverse flotation, which has the advantages of stable process and good product index, and the disadvantage is that the ore dressing needs to be heated and the processing cost is increased. The other is the cationic reverse flotation process, which has the advantages of simple reagent system, good product index and low temperature floatation, and its disadvantages are unstable process, difficult foam elimination, easy running slot and hindering normal production. Aiming at the problems existing in cationic reverse flotation process, a new cationic collector GE-609T was produced by using isomeric fatty alcohol and acrylonitrile as raw materials on the basis of existing cationic collector GE-609. The optimum conditions for the synthesis of etheramine (monoamine ether) were determined as follows: the molar ratio of aliphatic alcohol to acrylonitrile was 1: 1.05, the amount of catalyst KOH was 4.50 鈥，

本文編號：1882305