金属矿山
金屬礦山
금속광산
METAL MINE
2015年
6期
130-133
,共4页
三产品永磁立式精选机%旋转磁系%格筛%磁铁矿%精选
三產品永磁立式精選機%鏇轉磁繫%格篩%磁鐵礦%精選
삼산품영자입식정선궤%선전자계%격사%자철광%정선
Vertical permanent magnetic separator for cleaning with three products%Rotating magnetic system%Grizzly%Magnetite%Cleaning
针对传统湿式弱磁选机所存在的磁性夹杂和机械夹杂问题，研制了一种三产品永磁立式精选机。该机主要由上部给矿系统，立式外筒，带旋转磁系的立式弱磁内筒，立于内外筒之间、筛面垂直于圆筒表面的格筛，位于外筒上部的溢流槽，位于外筒下部的反冲洗水管、中矿排放口、精矿排放口，机架，传动与控制系统等组成，其分选原理是：在旋转磁系的作用下，处于内外筒之间分选区内的物料将进行离心圆周运动，磁性夹杂和机械夹杂的聚团在撞击格筛时被打散，磁铁矿单体颗粒在磁力和重力的作用下朝磁系方向运动并逐渐进入精矿槽，连生体颗粒在离心力和重力的作用下背离磁系方向运动并逐渐进入中矿槽，非磁性脉石颗粒在反冲洗水的作用下进入溢流槽成为尾矿。采用该机对南芬选矿厂铁品位为65．35%的磁选柱给矿进行精选试验，所获最终铁精矿的铁品位达68．78%，与现场所用磁选柱所获最终铁精矿的铁品位相当，同时可获得作业产率为10．89%、铁品位为49．08%的中矿和作业产率为2．97%、铁品位为25．54%的尾矿。试验结果说明三产品永磁立式精选机的设计思路是可行的，但尾矿铁品位偏高，需要通过进一步研究加以改进。
針對傳統濕式弱磁選機所存在的磁性夾雜和機械夾雜問題，研製瞭一種三產品永磁立式精選機。該機主要由上部給礦繫統，立式外筒，帶鏇轉磁繫的立式弱磁內筒，立于內外筒之間、篩麵垂直于圓筒錶麵的格篩，位于外筒上部的溢流槽，位于外筒下部的反遲洗水管、中礦排放口、精礦排放口，機架，傳動與控製繫統等組成，其分選原理是：在鏇轉磁繫的作用下，處于內外筒之間分選區內的物料將進行離心圓週運動，磁性夾雜和機械夾雜的聚糰在撞擊格篩時被打散，磁鐵礦單體顆粒在磁力和重力的作用下朝磁繫方嚮運動併逐漸進入精礦槽，連生體顆粒在離心力和重力的作用下揹離磁繫方嚮運動併逐漸進入中礦槽，非磁性脈石顆粒在反遲洗水的作用下進入溢流槽成為尾礦。採用該機對南芬選礦廠鐵品位為65．35%的磁選柱給礦進行精選試驗，所穫最終鐵精礦的鐵品位達68．78%，與現場所用磁選柱所穫最終鐵精礦的鐵品位相噹，同時可穫得作業產率為10．89%、鐵品位為49．08%的中礦和作業產率為2．97%、鐵品位為25．54%的尾礦。試驗結果說明三產品永磁立式精選機的設計思路是可行的，但尾礦鐵品位偏高，需要通過進一步研究加以改進。
침대전통습식약자선궤소존재적자성협잡화궤계협잡문제，연제료일충삼산품영자입식정선궤。해궤주요유상부급광계통，입식외통，대선전자계적입식약자내통，립우내외통지간、사면수직우원통표면적격사，위우외통상부적일류조，위우외통하부적반충세수관、중광배방구、정광배방구，궤가，전동여공제계통등조성，기분선원리시：재선전자계적작용하，처우내외통지간분선구내적물료장진행리심원주운동，자성협잡화궤계협잡적취단재당격격사시피타산，자철광단체과립재자력화중력적작용하조자계방향운동병축점진입정광조，련생체과립재리심력화중력적작용하배리자계방향운동병축점진입중광조，비자성맥석과립재반충세수적작용하진입일류조성위미광。채용해궤대남분선광엄철품위위65．35%적자선주급광진행정선시험，소획최종철정광적철품위체68．78%，여현장소용자선주소획최종철정광적철품위상당，동시가획득작업산솔위10．89%、철품위위49．08%적중광화작업산솔위2．97%、철품위위25．54%적미광。시험결과설명삼산품영자입식정선궤적설계사로시가행적，단미광철품위편고，수요통과진일보연구가이개진。
Aiming at the magnetic and mechanical inclusions existing in the traditional wet low intensity magnetic separa-tor,a vertical permanent magnetic separator with three products is developed. The machine is mainly composed of the upper feeding system,outer vertical tube,vertical weak magnetic inner drum with rotating magnetic system,the grizzly setting between outer and inner cylinder,the surface of which is perpendicular to the cylinder surface,overflow tank located in the upper part of the outer barrel,back-wash water pipe and outlet discharge of both middlings and concentrate located at the bottom of outer barrel,racks,drive system,and control system i. e. Its separation principle is:with the effect of rotating magnetic system,mate-rials in sorting area,between outer and inner cylinder,will conduct centrifugal circular motion,polyethylene formed by magnetic or mechanical inclusions will be scattered when impacting with the grizzly. Single magnetite particles move to the magnetic sys-tem and gradually enter into the concentration tank with the impact of magnetism and gravity. Locked particles move departure the magnet system and gradually into the middlings slot with the impact of centrifugal and gravity force. Nonmagnetic gangue particles flow into the overflow tank as tailings with the impact of back-washing water. Cleaning tests were conducted on the feeding of magnetic column in Nanfen Dressing Plant with 65. 35% iron. Iron grade of final iron concentrate obtained is 68. 78%,fairly with the concentrate gained from the on-site magnetic column,at the same time,middlings with yield of 10. 86%and iron grade of 49. 08% and tailings with yield of 2. 97% and iron grade of 25. 54% are achieved. The results indicate that, the design principle of vertical permanent magnetic separator for cleaning with three products is feasible,but the Fe grade of tailing is a bit higher. Further research and improvement should be continued.
