组合捕收剂对某石英型萤石矿的浮选试验研究（增刊）

江西某石英型萤石矿,其中大部分萤石与石英紧密连生,造成单体解离困难,从而影响矿物选别指标。化学多元素分析结果表明,矿石中CaF2品位为67.86%,SiO2、CaO、Al2O3含量较高,分别为19.04%、5.91%和3.32%。这表明矿石中脉石以石英和硅酸盐矿物为主,其他成分含量较少。本文探究了油酸钠（NaOl）和叔十二烷基硫醇（TDM）组合捕收剂对该石英型萤石矿的浮选效果,并对捕收剂进行了表面张力测定。浮选结果表明,组合捕收剂在矿浆pH为9.5,油酸钠和叔十二烷基硫醇摩尔比为8:2时,对萤石的浮选指标最好,通过1粗4精3扫全闭路浮选流程可获得CaF2品位为94.06%,回收率为99.55%的高品级萤石精矿。捕收剂的表面张力测试表明,组合捕收剂的CMC值略小于油酸钠,且在气—液界面的分子排列紧密度高于油酸钠。因此,相比于油酸钠来说,组合捕收剂可以更好的改变矿物表面的疏水能力。上述研究成果可为嵌布粒度细的石英型萤石矿的有效回收利用提供技术支持。     

新型捕收剂BK410在某萤石矿中的应用

研究采用新型捕收剂BK410浮选某石英—方解石型萤石矿。试验结果表明,采用水玻璃作抑制剂、BK410作捕收剂,采用一次粗选、两次扫选、粗精矿一段再磨、七次精选工艺流程,可获得萤石精矿含CaF2 97.88%、回收率83.45%、含SiO2 0.72%、CaCO3 0.71%的浮选指标。     

蒙古国某石英型萤石矿浮选试验

蒙古国某石英型萤石矿CaF2品位55. 98%,主要目的矿物萤石嵌布粒度较细,脉石矿物主要为石英和长石。为回收利用其中的萤石,进行浮选试验。结果表明,在磨矿细度-74μm 89. 4%、调整剂碳酸钠用量600 g/t、抑制剂水玻璃用量1 500 g/t、捕收剂油酸钠用量1 000 g/t、矿浆温度36℃的条件下,原矿经1粗6精1扫、中矿顺序返回闭路流程浮选,可获得CaF2品位98. 73%、回收率80. 05%的萤石精矿,杂质含量较低,达到优质萤石精矿质量标准。试验结果可为该萤石矿的合理利用提供一种可行的技术途径。     

白钨浮选尾矿回收萤石低温浮选试验研究

针对某地白钨浮选尾矿进行萤石低温浮选回收,在矿浆温度为12℃的条件下,试验室小型闭路试验获得的指标为:萤石浮选给矿CaF2含量为24.53%,CaCO3含量为6.25%;萤石精矿中CaF2含量为95.12%,回收率为58.07%,CaCO3含量为0.44%。在萤石浮选给矿CaF2含量为22.34%的条件下,工业试验获得萤石精矿中CaF2含量为93.70%,回收率为38.10%,CaCO3含量为1.40%。     

赣州某萤石尾矿浮选柱分选试验研究

针对赣州某萤石尾矿萤石粒度粗、CaF2含量低的特点,提出了磨矿-柱浮选工艺,解决了该萤石尾矿中CaF2难以回收的问题。考查了磨矿细度、矿浆pH值、水玻璃用量、捕收剂用量、浮选柱处理量、循环压力和充气量等因素对浮选指标的影响,优化了工艺和操作参数条件,并在此基础上进行全流程闭路试验。结果表明:在原矿品位22.87%的条件下,经过一段磨矿+浮选柱一粗三精工艺分选,可以获得精矿品位93.65%、回收率54.82%的良好指标。     

YS-02J复配型辅助捕收剂在萤石低温浮选中的应用

研制了一种复合聚氧乙烯醚类辅助捕收剂YS?02J,其与油酸捕收剂混合作用时可大大提高油酸在低温条件下的浮选性能,并能大幅度降低油酸用量.将辅助捕收剂YS?02J应用于湖南某萤石矿浮选,矿浆温度10℃时,以碳酸钠为调整剂、水玻璃为脉石抑制剂、油酸为捕收剂,在原矿CaF2品位16.21％条件下,一粗一扫四精闭路试验获得了C...     

萤石型稀土矿稀土萤石绿色同步回收技术研究

萤石型稀土矿浮选通常采用抑制剂抑制萤石及其它脉石矿物,羟肟酸类捕收剂优先浮选稀土矿物,浮选得到的稀土精矿再磁选提纯得到最终稀土精矿,再从稀土浮选尾矿中回收萤石工艺流程,该工艺和药剂虽然高效回收了萤石型稀土矿中的稀土矿物,但肟类捕收剂有一定毒性,且在优先浮选稀土作业萤石有用矿物的可浮性被强烈抑制,不利于萤石的再次浮选回收。因此,本文采用无毒药剂及稀土萤石同步浮选-稀土萤石混合精矿分离工艺技术,针对复杂难选萤石型稀土矿进行选矿试验研究,选矿原则工艺流程为：原矿磨矿-浮硫除杂-浮硫尾矿稀土萤石同步浮选-稀土萤石混合精矿浮磁分离。由于稀土萤石混合精矿分离浮选作业消除了稀土萤石混合精矿中不同矿物颗粒与捕收剂作用后形成无选择性杂凝聚团对磁选作业的不利影响,明显提高稀土精矿指标。对REO品位1.51%,CaF2品位16.13%的萤石型稀土矿原矿,磨矿细度-0.074 mm 含量占85%,采用预先浮硫,浮硫尾矿一次稀土萤石同步浮选粗选、六次稀土萤石同步浮选精选、稀土萤石混合精矿四次浮选分离和两次磁选分离工艺流程,闭路试验获得稀土精矿REO品位53.81%,REO回收率52.56%,萤石精矿CaF2品位92.03%,CaF2回收率67.77%,实现了萤石型稀土矿中稀土和萤石的绿色同步回收,也为稀土萤石混合精矿的分离提纯提供了一种可借鉴的方法。     

石英型萤石矿的浮选工艺和低温捕收剂应用研究

对某原矿CaF2品位为17.32％的石英型萤石矿,使用自制新型耐低温捕收剂DW-1,在低温环境6℃下,采用“1粗1扫6精,中矿顺序返回”的浮选工艺流程,获得了萤石精矿CaF2品位为98.37％、回收率为80.12％的良好指标,其浮选效果优于油酸钠,且药剂用量较低.     

福建某低品位共伴生白钨、萤石矿选矿试验研究

对福建某WO3品位0.10％、CaF2品位25.45％的低品位共伴生白钨、萤石矿,以矿冶科技集团有限公司自主研发的高效选矿药剂BK418作为白钨捕收剂,BK410作为萤石捕收剂,采用"白钨常温浮选-常温浮选钨精矿加温精选-白钨常温浮选尾矿浮选萤石"的工艺流程处理该矿石,获得钨精矿中WO3品位为60.48％,WO3回收率...     

从某黑白钨尾矿中回收萤石的试验研究

某黑白钨浮选尾矿含CaF225.12%,采用预先磁选-萤石浮选的工艺流程,以Na2CO3为调整剂,水玻璃为抑制剂,BK410为捕收剂,进行1次粗选、6次精选、2次扫选的闭路浮选,进行萤石的回收试验研究,最终可获得含 CaF297.15%,回收率69.89%的精矿产品,较好地对萤石进行了回收。     

Three-dimensional modeling of a deposit in a database

Institute of Mining, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 77–85, July–August, 1991.     

某厂房吊车梁结构性能检测

对某厂房预制钢筋混凝土吊车梁进行了正常使用极限状态的性能检测，并详细介绍了试验的实现方法以及对有关检测规范的具体运用。     

某厂房吊车梁结构性能检测

对某厂房预制钢筋混凝土吊车梁进行了正常使用极限状态的性能检测,并详细介绍了试验的实现方法以及对有关检测规范的具体运用。     

Parameters of rigid-wedge introduction in a sample with a cut

Institute of Mining, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 1, pp. 109–113, January–February, 1989.     

Interfering ions in the flotation of a phosphate ore in a batch column

The “Barreiro” carbonatite complex is located in Araxá, MG, Brazil. The production of apatite concentrate from this ore started in 1978 and the current production capacity is 800,000 tonnes.The ore is subjected to the following unit operations in the concentrator: grinding, classification, low field magnetic separation, desliming, apatite and barite flotation, high field magnetic separation, filtration and drying.Barite and apatite flotations were performed in 300 ft³ (8.5 m³) Wemco mechanical cells until 1992. The replacement of the mechanical cells by flotation columns occurred in two stages: fine fraction flotation circuit in 1993 and coarse fraction flotation circuit in 1994. All the 66 mechanical cells were replaced by 6 flotation columns (3.0 m × 4.5 m × 14.5m), resulting in improved selectivity and recovery and significant reductions in the consumption of the collectors for barite and, mainly, for apatite.The flotation process control monitoring in laboratory bench scale mechanical cells was then inadequate due to the discrepancy with the industrial practice. A specific methodology was developed for batch column flotation testing. The technique was checked by means of comparison with the industrial plant practice of apatite and barite flotation, showing its reproducibility and reliability for process development testwork.The batch flotation column was utilised to evaluate the effect of ions (dosed in the conditioning stage) on the flotation of barite and apatite. Flotation tolerance limits were established for the ions calcium, magnesium, phosphate, fluoride and rice bran oil soaps. Due to the fact that these ions were dosed as sodium salts (in the case of anions) or as chlorides (in the case of cations), the effect of sodium and chloride ions was also assessed (tests with the addition of sodium chloride).The results led to the environmental benefit of a full process of water recirculation in the concentrator without impairing the flotation performance.