共查询到20条相似文献,搜索用时 203 毫秒
1.
2.
3.
滇西某铁矿Fe品位为13.66%,且主要以嵌布粒度细的磁铁矿形式存在。针对原矿品位低及矿物嵌布粒度细等特点,采用"粗磨-弱磁粗选-粗精矿再磨-弱磁精选"的工艺流程。可获得铁精矿Fe品位64.47%,回收率56.87%的指标,为此类矿石的选别提供参考。 相似文献
4.
山东某黄金选冶厂氰渣中主要有价元素为铁,品位为20.29%,矿物主要以磁铁矿、褐铁矿、硅铁矿形式存在。因该氰渣嵌布粒度微细,且褐铁矿理论含铁偏低,为了尽可能获得高品位铁精矿,开展了选矿试验研究。试验结果表明:采用弱磁粗选—强磁粗选—摇床精选联合工艺流程可实现铁资源的回收利用。若将弱磁精矿、摇床中矿、摇床精矿合一可获得铁品位为59.27%、铁回收率为48.01%的铁精矿;若将弱磁精矿、摇床精矿合一,可获得铁品位为61.21%、铁回收率为46.66%的铁精矿。 相似文献
5.
对黑龙江某大型钼矿深部矿石进行了选矿工艺试验研究,考察了浮选流程结构、药剂制度、磨矿细度等因素对浮选指标的影响.结果表明:采用钼粗选—粗精矿再磨精选—粗选尾矿选硫工艺流程,在最佳工艺参数下,可获得钼精矿钼品位50.800%、钼回收率82.59%,硫精矿硫品位44.640%、硫回收率69.98%的较好工艺指标. 相似文献
6.
新研制的M-CCTB154永磁筒式磁选机采用阶梯式复合磁系,磁包角135°,分选粒度8~0mm,平均磁感应强度190mT,处理量可达120~250t/h,为我国选别设备大型化提供了新的高效设备。在南芬选矿厂一段选别的工业试验表明,与原CTB1232磁选机比较,精矿品位基本持平,尾矿品位降低0.17个百分点,精矿回收率提高0.28个百分点。 相似文献
7.
8.
9.
10.
《稀土》2017,(5)
某稀土矿矿物种类繁多,矿石性质复杂,稀土元素品位低、赋存状态复杂,主要为氟碳铈矿和独居石。有用矿物嵌布粒度细,与绿泥石、长石等脉石矿物共生紧密、交代复杂造成的难以磨矿解离是选矿回收的难点。根据矿石性质,在探索试验的基础上,确定采用阶段磨矿、阶段选别、反浮选脱硫-浮选稀土矿物工艺流程:原矿磨矿细度选择0.074 mm 90%,添加NaCO_3和NaOH调整pH约8.5,添加CuSO_4为活化剂,丁基黄药为捕收剂,2#油为起泡剂,反浮选硫化物脱硫。脱硫尾矿作为给矿,添加水玻璃为脉石抑制剂,Na_2SiF_6为稀土矿物活化剂,H_(205)和D_(41)为捕收剂,经一次粗选、四次精选、一次扫选产出稀土精矿和尾矿,稀土精选中矿再磨细度0.043 mm 90%,添加H205和D41单独浮选处理,获得中矿处理精矿返回到稀土精选Ⅱ作业,中矿处理尾矿返回到稀土粗选作业。闭路试验获得稀土精矿稀土品位30.20%,回收率76.10%;硫化物稀土品位1.85%,回收率3.28%的选矿指标。 相似文献
11.
《钢铁研究学报(英文版)》2016,(9):874-883
Direct reduction of high-phosphorus oolitic hematite ore based on biomass pyrolysis gases(CO,H_2,and CH_4),tar,and char was conducted to investigate the effects of reduction temperature,iron ore-biomass mass ratio,and reduction time on the metallization rate.In addition,the effect of particle size on the dephosphorization and iron recovery rate was studied by magnetic separation.It was determined that the metallization rate of the hematite ore could reach 99.35% at iron ore-biomass mass ratio of 1∶0.6,reduction temperature of 1 100℃,and reduction time of 55 min.The metallization rate and the aggregation degree of iron particles increase with the increase of reduction temperature.The particle size of direct reduced iron(DRI) has a great influence on the quality of the iron concentrate during magnetic separation.The separation degree of slag and iron was improved by the addition of 15 mass% sodium carbonate.DRI with iron grade of 89.11%,iron recovery rate of 83.47%,and phosphorus content of 0.28% can be obtained when ore fines with particle size of-10 μm account for 78.15%. 相似文献
12.
准确测定钢渣中的磁性铁含量有利于提高钢渣磁选效率和评价磁选工艺的磁性铁回收效率。实验采用多级磁选分离的方法,通过测定钢渣磁选物以及尾渣的密度,并假设钢渣磁选物中非磁性相的密度与尾矿渣的密度相同,从而达到测定钢渣中的磁性铁含量的目的。实验选取了转炉渣、脱硫渣作为研究对象,分别测得两种钢渣的磁性铁含量为3.81%和3.72%(质量分数),平均误差为3.93%,并使用了行业标准(YB/T 140和YB/T 4188-2009)验证了测定结果的可靠性。XRD测定结果表明,磁选物的物相中含有较多磁性物,且钢渣的物相与尾渣一致,证明了测定方法假设是可行的。 相似文献
13.
介绍了柿竹园钨钼铋尾矿的工艺矿物学性质及可选性试验研究。根据尾矿性质,确定采用预先筛分粗颗粒直接抛尾,细粒级进入萤石浮选,粗精矿精选,产品强磁脱硅,部分中矿单独再选产出低品位萤石精矿的混合流程。最终获得高品位萤石精矿,CaF297.22%,回收率为55.06%,低品位萤石精矿CaF290.89%,回收率为8.16%。 相似文献
14.
为提高铜钼分离效率,在小型试验和流程考查的基础上,对多宝山铜(钼)矿铜钼分离工艺进行了改进和药剂制度优化,将粗扫选流程由一次粗选、两次扫选改为两次粗选、一次扫选,捕收剂由煤油调整为煤油+废机油.工业生产表明:改造后,钼精矿钼品位、铜品位分别为45.939%、1.862%,铜精矿铜品位、钼品位分别为20.830%、0.1... 相似文献
15.
昆明钢铁总公司某铁矿选矿流程试验研究 总被引:1,自引:0,他引:1
对以磁铁矿和赤铁矿为主的混合型铁矿,采用弱磁和强磁相结合的磁选工艺进行试验研究,重点进行了SLon脉动高梯度磁选的不同工艺条件试验以及连续磨选和阶段磨选两种流程的比较试验,确定合理选别流程,并获得高品位铁精和高回收率指标。 相似文献
16.
介绍了江西铜业集团公司永平铜矿硫酸渣制备铁精矿工艺途径的改进实践过程.通过分析硫精矿和硫酸渣的铁物相、化学多元素、粒度和品位情况,在工业试验的基础上,获得原矿硫品位41.28%、硫精矿品位50.02%、硫回收率93.29%、铁精矿品位63.19%的指标,确定选高硫精矿直产铁精矿为优选方案. 相似文献
17.
《Baosteel Technical Research》2010,(Z1):138
In present,the wet-based pattern is mainly adopted to deal with the steel slag by steel plant at home and abroad,the wet-based technology has some defects;Wasting of water,pollution of the environment,and the slag has not been fully recycled.This paper presents a new method,which is aimed to realize dry granulation,waste heat recovery and comprehensive utilizing the steel slag.According to the ideas of wind quenching granulation,the heating slag from the converter furnace,was bring to the granulation heat exchange system,through the process of breaking in a container,the granulation heat exchange system has the functions of feeding continuously and heat exchange.The heat air,through the diversion tubes,could be recycled in removing the dust.The granulation slag could be bring to a confined roller,granulating and cooling secondarily.The roller export was connected to a magnetic separator.The separated iron could be recycled,and the remaining slag could also be reused as building materials,in process of stabilization and secondary magnetic separation.The heated air could be guided into the boiler to generate the steam,which can be used to generate electricity,or use as cleaned energy,realizing the target to recycle the waste heat in steel slag.The highlights of the new method are dry granulation and waste heat recovery.This paper states the process of heat exchange between the air and the steel slag in the system of granulation heat exchange in the new technical process.In theory,it has been proved reasonable with the the system of granulation heat exchange,and also the work conditions has been optimized. 相似文献
18.
19.
攀西细粒级钛铁矿高效回收工艺研究 总被引:1,自引:0,他引:1
针对攀西地区追求钒钛铁精矿品质造成选铁尾矿变细,高梯度强磁机难以同时兼顾细粒级钛铁矿品位和回收率的问题,采用高梯度强磁机与悬振锥面选矿机作为浮选原料富集设备,并与浮选组成联合选别工艺进行实验室对比研究。试验表明:设置有悬振作业的浮选原料中干扰浮选的-19μm矿泥含量低于单一强磁作业,且"悬振+浮选"联合流程对TiO_2品位10.57%的细粒级钛铁矿回收效果最优,能获得产率13.29%、TiO_2品位47.20%、TiO_2回收率60.00%的合格钛精矿。 相似文献
20.
对铜渣进行XRD物相、扫描电镜和能谱以及主要元素含量的分析,指出从铜渣中回收铁的困难.综述了国内外从铜渣中回收铁的一些主要工艺方法及其优缺点,并提出弱氧化焙烧-磁选处理铜渣的新方法.铜渣和CaO的质量比为100:25,CO2和CO的气体流量分别为180 mL/min和20 mL/min,焙烧温度1 050 ℃,保温焙烧2 h后,冷却后破碎磨细至0.074 mm,再通过170 mT的磁场磁选分离得到铁精矿.获得了铁品位54.79 %的铁精矿和含铁22.12 %的磁选尾矿,铁的回收率为80.14 %,基本实现了铜渣中铁的回收. 相似文献