矿冶工程
礦冶工程
광야공정
2015年
2期
117-119,123
,共4页
高铝高硅褐铁矿%钠化焙烧%磁选
高鋁高硅褐鐵礦%鈉化焙燒%磁選
고려고규갈철광%납화배소%자선
high-alumina and high-silicon limonite%sodium roasting%magnetic separation
针对某高铝高硅难选褐铁矿（Al2O3含量26．11％、SiO2含量13．88％）进行了钠化焙烧?磁选试验研究。通过单因素试验和正交试验探讨了钠盐种类、钠盐用量、焙烧时间、焙烧温度、磁选粒度、磁选强度对选别指标的影响，结果表明，在焙烧温度1050℃、焙烧时间40 min、Na2 CO3用量12％、煤粉用量20％、磨矿细度－0．038 mm粒级占98．86％、磁场强度200 kA／m条件下可获得铁品位57．91％、铁回收率97．50％的铁精矿。钠化焙烧后产品再经阶段磨矿、阶段磁选可获得铁品位62．04％、铁回收率60．90％的铁精矿。
針對某高鋁高硅難選褐鐵礦（Al2O3含量26．11％、SiO2含量13．88％）進行瞭鈉化焙燒?磁選試驗研究。通過單因素試驗和正交試驗探討瞭鈉鹽種類、鈉鹽用量、焙燒時間、焙燒溫度、磁選粒度、磁選彊度對選彆指標的影響，結果錶明，在焙燒溫度1050℃、焙燒時間40 min、Na2 CO3用量12％、煤粉用量20％、磨礦細度－0．038 mm粒級佔98．86％、磁場彊度200 kA／m條件下可穫得鐵品位57．91％、鐵迴收率97．50％的鐵精礦。鈉化焙燒後產品再經階段磨礦、階段磁選可穫得鐵品位62．04％、鐵迴收率60．90％的鐵精礦。
침대모고려고규난선갈철광（Al2O3함량26．11％、SiO2함량13．88％）진행료납화배소?자선시험연구。통과단인소시험화정교시험탐토료납염충류、납염용량、배소시간、배소온도、자선립도、자선강도대선별지표적영향，결과표명，재배소온도1050℃、배소시간40 min、Na2 CO3용량12％、매분용량20％、마광세도－0．038 mm립급점98．86％、자장강도200 kA／m조건하가획득철품위57．91％、철회수솔97．50％적철정광。납화배소후산품재경계단마광、계단자선가획득철품위62．04％、철회수솔60．90％적철정광。
A sort of refractory limonite ( containing 26.11%of Al2 O3 and 13.88%of SiO2 ) was taken as a sample for the tests on the process of sodium roasting?magnetic separation. Single factor test and orthogonal test were conducted to explore effects of species, dosage of sodium salts, roasting temperature and time, particle size and magnetic intensity for magnetic separation on the separation efficiency. It was found that iron concentrate grading 57.91% Fe at the recovery of 97.50% could be obtained after roasting process at a temperature of 1 050 ℃ for 40 min with the following conditions including dosage of Na2 CO3 and coal dust at 12% and 20% respectively, grinding fineness of -0. 038 mm 98. 86%, magnetic field intensity of 200 kA/m. The obtained product was subjected to the following staged grinding and staged magnetic separation, resulting in the iron concentrate grading 62.04% Fe at the recovery of 60.90%.
