河南某地钠长石矿选矿增白试验研究

针对河南某钠长石矿中的方解石、含钛矿物和云母等杂质矿物,采用磨矿-脱泥-磁选-浮选联合流程对其进行了选矿增白试验研究,得到了精矿白度为66.09%,Na_2O含量为9.03%,Fe_2O_3含量低至0.05%,TiO_2含量降低至低于X射线荧光光谱仪检出限,产率为67.08%的长石精矿,此钠长石可达到日用陶瓷一级品标准。XRD分析可知影响长石精矿白度的含钛矿物为钙钛矿。     

湖北某长石矿磁选除铁试验

湖北某长石矿Al_2O_3品位18.03%,Fe_2O_3含量1.40%,长石矿物主要与石英共生为集合体,矿石组成复杂。为有效去除其中的铁,进行磁选试验。结果表明,长石矿经磨矿(-0.074mm 70%)—脱泥(粒度38μm)—弱磁选(0.35 T)—1粗1扫强磁选流程分选,可获得Fe_2O_3含量0.07%、白度71%的优质长石精矿。     

江西某钨锡重选尾矿综合回收石英和长石试验研究

针对江西某钨锡重选尾矿中石英、长石、云母含量高的特点,试验采用磨矿—磁选除铁—脱泥—云母浮选—石英与长石浮选分离的无氟少酸工艺综合回收石英和长石。在试样磨矿细度?0.074 mm含量占73.20%、磁场强度为1.0 T条件下进行磁选除铁,非磁性产品采用静置—虹吸方法脱去?0.020 mm细泥。磨矿—磁选—脱泥等预处理后的样品采用碳酸钠调整矿浆pH=10.5、捕收剂YF-1用量240 g/t 和十二胺用量80 g/t 联合浮选云母。对云母浮选尾矿以Ba2+用量120 g/t活化石英、YF-2用量250 g/t 抑制长石、捕收剂YF-1用量250 g/t 进行石英与长石的浮选分离。石英浮选尾矿即为长石精矿 ,石英精矿通过酸法反浮选长石工艺得到石英精矿和长石副产品。试验获得石英精矿产率25.30%,SiO₂含量99.20%,石英矿物回收率50%;长石精矿产率22.69%,K₂O+Na₂O含量13.16%,长石副产品产率7.68%,K₂O+Na₂O含量9.23%,长石矿物总回收率约79%;云母精矿产率14.50%,K₂O含量7.65%,Na₂O含量1.65%,Al₂O₃ 含量16.40%,云母矿物回收率85%。      

无氟碱浸石英长石分离工艺研究

本文对所选用的石英砂进行了理化性能检测和石英长石分离工艺研究。试验采用重选、磨矿、磁选、碱浸、擦洗、无氟浮选等工艺,将长石和石英基本分离,石英最终精矿的SiO_2含量为98.22%,Al_2O_3含量为0.96%,Fe_2O_3含量为0.056%,满足浮法玻璃和一般器皿玻璃的技术指标;长石最终精矿的Al_2O_3含量为17.50%,Fe_2O_3含量为0.24%。已经可以用作平板玻璃、陶瓷工业原料。     

河南某长石矿选矿试验研究

对河南某长石矿进行了矿物组成分析、物相分析和多元素分析,通过磨矿细度、磁选、脱泥粒度、浮选等试验研究,确定了 “磨矿-脱泥-强磁选-脱泥-反浮选除铁-长石浮选”的工艺流程。结果表明,该选矿工艺最终可获得产率49.98%、K₂O品位11.12%、TFe含量0.20%的长石精矿以及产率12.75%、SiO₂品位96.54%的石英精矿。     

某钠长石矿选矿除杂试验

针对某钠长石矿有害杂质成分复杂的特点,进行了选矿除杂试验研究。试验结果表明:采用磨矿—脱泥—磁选—反浮选的工艺流程,可有效去除矿石中的含铁、含钛矿物,并获得Fe_2O_3含量为0.060%、TiO_2含量为0.065%、烧成白度为52.46%的长石精矿。     

河南某含电气石、长石铌钽矿综合回收试验研究

河南某钽铌多金属矿中Nb2O5、Ta_2O_5含量分别为236 g/t、56 g/t,达到工业开采指标要求;原矿中有用矿物主要为铌钽铁矿,还伴生电气石、长石,脉石矿物则主要为石英、磁铁矿、黑云母等;铌钽铁矿以针状或柱状形式被电气石包裹,嵌布粒度较细;电气石为铁电气石,嵌布粒度粗;长石与石英结合紧密;根据矿石性质,采用阶段磨矿—磁选粗选富集—再磨—重选精选联合流程进行选矿试验,获得产率为0.02%的铌钽精矿,其中Nb2O5和Ta_2O_5含量分别为44.61%和10.29%,回收率分别为37.81%和36.75%;采用重选—浮选工艺对联合流程的磁选尾矿进行分选,获得K_2O+Na_2O含量为11.75%的长石精矿,其产率和回收率分别为36.17%和52.36%;对联合流程的重选尾矿采用摇床分选,获得了B_2O_3含量为8.31%的电气石精矿,其产率和回收率分别为4.90%和55.66%,通过适宜的联合工艺流程,实现了对该矿产资源中钽铌矿、电气石、长石的综合回收。     

广西某低品位长石矿选矿试验

广西某低品位长石矿K_2O+Na_2O品位为8.72%,非金属矿物以正长石、斜长石、石英等为主,磨矿时易泥化,石英与长石分离困难。为实现长石的回收利用,采用磁选除铁—脱泥—浮选分离原则流程进行选矿试验。结果表明,在磨矿细度-0.074mm占40%的条件下,原矿经磁选除铁—机械脱泥—1粗1精2扫浮选分离—再磁选流程选别,可获得长石精矿K_2O+Na_2O品位13.51%、Fe_2O_3含量0.13%,K_2O回收率83.90%、Na_2O回收率81.24%的良好指标,石英精矿SiO_2品位99.13%,满足使用要求,实现了长石与石英无氟浮选分离,可供该长石矿的开发利用参考。     

磁选尾矿综合回收钽铌锂及长石选矿工艺研究

江西宜春地区钽铌锂选矿厂磁选作业排放的尾矿含Li_2O 1.51%、Ta_2O_5 0.031%、Nb_2O_5 0.027%及长石矿物等,具有较好的再回收利用价值。为综合回收尾矿中的有价资源,对其进行了矿石性质和选矿工艺研究。结果表明,采用"‘摇床+铺布溜槽’重选回收钽铌-浮选回收云母-磁选除杂回收长石"的"重-浮-磁"联合工艺,可获得含Ta_2O_5 21.14%、回收率40.92%的钽铌精矿,含Li_2O 4.32%、回收率71.41%的锂云母精矿,含TFe 0.09%、白度75.40%、产率为32.56%的长石精矿。试验指标良好,钽、铌、锂及长石等矿物均得到了较好的综合回收,具有良好的经济和环保效益,为现场工艺优化及同类资源的综合回收提供了有力技术支撑。     

某低品位钾长石矿提纯工艺研究

分析了某低品位钾长石矿的主要矿物成分,K2O+Na2O含量为7.47%。针对该钾长石矿的性质,进行了单一磁选、脱泥-磁选、浮选、脱泥-磁选-浮选四个除铁流程试验,结果表明浮选法除铁效果较佳。试验首先采用阴离子捕收剂十二烷基磺酸钠和石油磺酸钠反浮选除去长石矿中细粒的含铁矿物,再经HF法用十二胺捕收剂对长石-石英进行分离,结果表明,可得产率43.57%、含Fe2O30.25%、K2O13.10%、Na2O0.21%、SiO266.77%的长石精矿和产率41.33%、含Fe2O30.18%、SiO297.66%的石英精矿。      

某中低品位钾长石无氟浮选试验研究

采用无氟浮选工艺对低品位钾长石矿进行了浮选试验研究,试验结果表明,采用磨矿-沉降脱泥-一粗一精-强磁选的选矿工艺流程,在磨矿细度为-0.074mm含量占50%,粗选pH为4,油胺与石油磺酸钠用量分别为800g/t、1600g/t时,可获得产率59%,K2O+Na2O品位为12.55%的长石产品,同时可获得产率为19.94%,SiO2品位为97.12%石英产品。此选矿工艺为该长石资源的综合利用提供了参考。     

Combined application of different collectors in the floatation concentration of Turkish feldspars

The application of different cation collectors in the floatation concentration of feldspar has been investigated. Raw material (Kaltun Mining Co.) from Cine, Aydin in Turkey was used. The results showed that for floatation of feldspars, combined application of AERO 3030C and AERO 801 + AERO 825, performed better than the application of these collectors alone. They were more selective, and with their application a higher mass recovery of feldspar was obtained. However, the chemical compositions of the feldspar concentrates were not significantly different no matter which of these reagents was used. A higher quality of feldspar concentrate: 67.06% SiO₂; 19.49% Al₂O₃; 0.018% Fe₂O₃; 0.135% TiO₂; 0.98% CaO; 0.02% MgO; 11.02% Na₂O; 0.22% K₂O; 0.02% P₂O₅ was obtained when a combination of these collectors was applied.     

Recovery of feldspar from trachyte by flotation

In this study, recovery of feldspar from trachyte by flotation was studied. A feldspar concentrate containing 5.72% K₂O, 5.33% Na₂O, 0.321% Fe₂O₃ and 0.080% TiO₂ was obtained from a feed containing 5.20% K₂O, 3.37% Na₂O, 1.778% Fe₂O₃ and 0.253% TiO₂ with an overall recovery of 22.4% by weight.     

Technological characterization of kaolin tailing from small-scale mining in RN and PB states – Brazil

In small-scale mining in north-eastern Brazil, the exploitation of industrial minerals, where kaolin bearing pegmatites are mined, is common. The mineral processing of kaolin is based in mixer and classification by screen and cyclone. The overflow of cyclone is thickened and filtered by pressure filter. The product is dried for market. This work presents the results of tailings characterization. Mass balance was realized and recuperation of kaolin about 56% was identified. The feed grade of Al₂O₃ in the plant is 21.20%. The kaolin product for market sold by the company presents 37.19% Al₂O₃ and whiteness of 81.9%. The average Al₂O₃ content of the tailing is 15.55%. Minerals identified are feldspar, muscovite, tourmaline, illite and kaolinite. The −325# fraction of the tailings present Al₂O₃ grades with characteristics for market (Al₂O₃-35%) and whiteness of 79.7%. Values from 7 to 34 wt% of this −325# fraction were determined in the tailing samples analyzed; these results validate the feasibility of reprocessing the tailings for using in the ceramic industry.     

不同磨矿分级方式对长石矿分选效果的影响

本溪长石矿含有褐铁矿、伊利石、金红石等杂质矿物,为提高该长石品级,开展了不同磨矿分级方式的选矿研究。通过考察实验室磨矿、连续磨矿-螺旋闭路分级、连续磨矿-高频细筛闭路分级3种磨矿方式,磨矿细度为-0.074mm 52%时,将3种磨矿试样以强磁选-浮选流程杂质并分离石英。结果表明:连续磨矿-高频细筛方式的粒度组成较好,其筛下试样能取得更好的分选效果,最终得到产率为50.64%,Na2O含量为11.04%,收率为70.25%的长石精矿,为该长石矿工程化生产提供了依据。     

江西宜丰低品位锂云母矿中锂云母和长石的综合回收研究

江西宜丰地区锂云母矿风化严重、矿物赋存形式复杂, 锂云母中Li₂O理论品位较低, 为实现该锂云母矿中锂云母和长石的高效回收, 开展了详细的选矿试验研究。研究结果表明, 采用脱泥—浮选—磁选工艺, 首先对原矿进行脱泥, 降低了微细粒脉石矿物在锂云母矿物表面的罩盖, 然后以高选择性捕收剂ZY浮选锂云母, 实现了锂云母与脉石矿物的有效分离, 最终获得含Li₂O 1.73%、回收率75.87%的锂云母精矿; 浮选尾矿经磁场强度为1.5 T的高梯度磁选除铁后, 可获得作业产率为94.31%、含Na₂O 5.78%、K₂O 3.08%、Fe₂O₃ 0.07%、白度为67.21%的长石精矿, 可作为陶瓷原料使用。该工艺处理锂云母矿获得了良好的选矿指标, 实现了锂云母及长石的综合回收。      

高硅铝土矿正浮选两段脱硅试验研究

本文以云南鲁甸高硅低铝硅比型铝土矿为研究对象,通过正浮选阶段磨矿阶段选别、两段脱硅工艺流程获得了较好的铝土矿精矿,浮选指标良好。原矿含Al2O360.78%、Si O220.84%,铝硅比(A/S)为2.92,主要脉石矿物为白云母、石英等。通过在粗磨条件下进行一段浮选脱硅,粗精矿再磨再选后进行二段浮选脱硅,产出合格精矿。粗精矿再磨后进行五次精选,闭路试验获得精矿产率为64.74%、Al2O370.83%,Si O28.40%、A/S为8.43、Al2O3回收率为75.83%的良好指标。     

某钾长石矿SLon强磁除铁提纯工艺研究与应用

四川某钾长石矿中含K2O 9.81%,Na2O 2.25%,属于优质钾长石矿,但由于含铁量高,白度低,未能开发利用。采用SLon立环脉动高梯度磁选机3次除铁,最终工业生产钾长石产品中Fe2O3含量降至0.07%,白度提高到65%以上,产率在70%以上,获得优质钾长石产品。     

广东某石材加工废料综合回收试验研究

对广东某地石材加工废料开展了物料性质研究,查明了废料的主要矿物组成及粒度特性,进而对废料中的长石和石英有价矿物进行了综合回收的选矿试验。结果表明,在碱性条件下采用新型两性捕收剂YOA对废料中的含铁云母类杂质进行浮选脱除,可使废料中的铁含量由1.46%降低至0.78%,白度值由40.10提高至51.40,分选效果良好;对浮选除杂后的精矿产品在1.5T磁场强度下进行磁选脱铁,铁含量进一步降低至0.38%(折算为0.54%),白度值进一步提高至53.70,使长石 石英混合精矿质量达到陶瓷原料要求,可见采用浮选 磁选的联合方案可实现广东某石材加工废料的综合回收。      

Selective separation of fine albite from feldspathic slime containing colored minerals (Fe-Min) by batch scale dissolved air flotation (DAF)

In this study, the separation of feldspar minerals (albite) from slimes containing feldspar and iron containing minerals (Fe-Min) was studied using dissolved air flotation (DAF) technique whereby bubbles less than 100 μm in size are produced. Before the flotation experiments with slimes, single flotation experiments with albite and Fe-Min were carried out using DAF in order to obtain optimum flotation conditions for the selective separation of feldspar from the slimes. Flotation experiments were performed with anionic collectors; BD-15 (commercial collector) and Na-oleat. The two methods of reagent conditioning were tested on the flotation performance; traditional conditioning and charged bubble technique. In addition, the effect of pH, flotation time, rising time, and drainage time which influence the selective separation in the DAF system were studied in detail. Overall, the flotation results indicated that the separation of albite from Fe-Min can be achieved with DAF at 5 min of rising time and 5 min of drainage time. Interestingly, these results also showed that the conditioning of the particles with the charged bubbles increased the flotation recovery of Fe-Min compared to the traditional conditioning. Furthermore, the flotation tests with the feldspathic slime sample were carried out under the optimum conditions obtained from the systematic studies using the single minerals. The charged bubble technique produced an albite concentrate assaying 0.33% Fe₂O₃ + TiO₂ and 11.07% Na₂O + K₂O from a slime feed consisting of 1.06% Fe₂O₃ + TiO₂ and 10.36% Na₂O + K₂O.