萤石——重晶石矿石综合利用研究

该矿石中萤石和重晶石含量高,但矿物可浮性相近,分离难度较大。通过试验研究,采用优先浮选、浮重抑萤的工艺,获得了较好的分离效果,基本达到了萤石-重晶石矿石综合利用的目的。     

遂昌萤石矿的工艺矿物学及其浮选性能

为了高效利用浙江遂昌萤石矿资源,基于工艺矿物学对浮选性能研究的重要性,研究了矿石的主要化学成分、矿物组成及嵌布特征,并探讨了矿物的浮选行为.结果表明,遂昌矿区横坑坪矿和坑口矿两种矿石的结构类型基本一致,脉石矿物主要为石英,其次为长石、绢云母、方解石、高岭石等.两种矿石的主要区别在于,横坑坪矿样中方解石含量较高,达5.4%,且嵌布关系较为复杂.方解石与萤石的可浮性相近,直接导致横坑坪矿样的选别难度相对较大.浮选试验结果与矿石工艺矿物学研究结果一致.     

萤石-重晶石浮选分离试验研究

通过对某萤石-重品石矿石分离试验研究，发现通过合理药剂配伍．经多次精选可有效分离，获得高质量萤石精矿，满足氟工业的需要，矿浆pH值对浮选分离影响大，水玻璃 焦性没食子酸 硫酸亚铁的药剂组台，对萤石-重晶石分离有良好效果。     

安徽某地石英砂的加温反浮选试验

研究了温度从15℃升高到50℃时,安徽省某地石英砂矿物的反浮选特性。研究表明在矿浆pH值2-2．5时,温度为45℃,石英表面ζ电位的负值是试验温度范围内的最低值,此时长石的表面ζ电位的负值比在25℃时要大,有利于阳离子捕收剂在长石表面的吸附,从而提高长石与石英的浮选分离效果。     

高分散性固体聚氨酯磁带胶的制备

研究了含-SO3Na基团的固体聚氨酯磁带胶的合成工艺条件，即原料配比、反应温度、反应时间、分子量，以及-SO3Na基团含量等因素对提高磁粉分散性的影响．并与不含-SO3Na基团的聚氨酯磁带胶进行对比，得到-SO3Na基团含量为0．70％。1．00％(质量分数)时，对磁粉的分散性有显著提高．     

采用有机抑制剂进行无石灰铜硫分离及机理研究

研究了在低碱条件下淀粉、焦性没食子酸、水杨酸、单宁酸、乳酸等多种有机抑制齐j及它们之间的组合物对黄铜矿、黄铁矿可浮性的影响．选择焦性没食子酸＋单宁酸作为黄铁矿的高效抑制剂,进行铜硫人工混合矿的浮选分离试验和实际矿石的铜硫浮选分离试验,该工艺与传统的石灰工艺比较,铜精矿中的金的品位提高1．24g／t,回收率提高7．74％;银的品位提高4．56g／t,银的回收率提高6．18％;钼的品位提高0．145％,钼的回收率提高35．29％．最后对其作用机理进行分析．     

蛋白质改性粘胶纤维染整工艺研究

采用Anozol活性染料对蛋白质改性粘胶纤维——含丝素蛋白粘胶纤维的染整工艺进行了研究,分析了Na2CO3和H2O2对其前处理效果的影响．探讨了经除氧酶处理后前处理织物染色性能的变化以及元明粉、Na2CO3对织物上染率、K／S值和色牢度的影响,并通过试验得出一套适宜于该粘胶织物的染整工艺．     

电位调控浮选技术选别南京铅锌银矿的实验室研究和生产实践

通过实验室研究获得了南京铅锌银矿铅 /锌-硫电位调控浮选分离的最佳条件 :矿浆pH1 2 4～ 1 2 5 ,矿浆电位 1 6 0～ 1 80mV ,乙硫氮 (DDTC)作为选铅主要捕收剂 ,石灰作为pH和矿浆电位的调整与稳定剂 .电位调控浮选新技术的工业生产实践表明 ,与原工艺相比 ,选矿指标明显提高 ,选矿流程大大简化 ,无须添加闪锌矿的常规抑制剂ZnSO4+Na2 SO3,经济效益十分明显     

细粒黑钨矿絮团浮选的研究

本文以聚丙烯酸为絮凝剂、油酸钠为捕收剂,进行了细粒黑钨矿(-20μ)絮团浮选的研究。系统地研究了细粒黑钨矿的絮团浮选行为,进行了细粒黑钨矿与石英的絮团浮选分离,研究了金属离子(Mn~(2+)、Fe~(2+))对黑钨矿絮团浮选的影响,通过(?)电位、红外光谱和捕收剂吸附量的测定,揭示了聚丙烯酸与油酸钠在黑钨矿表面的吸附机理及其相互作用;通过絮团粒度及结构分析讨论了在絮团浮选中聚合物与捕收剂所产生的联合团聚效应;进行了黑钨矿絮团浮选动力学研究;探讨了细粒黑钨矿的絮团浮选机理.并根据聚合物与捕收剂的联合选择性团聚作用,提出了一种新的絮团浮选工艺——CPC絮团浮选.     

混凝沉淀法处理萤石浮选废水工程

研制了一种萤石浮选废水高效混凝剂并投入应用。从萤石浮选废水处理的一个成功实例,分析、总结了混凝沉淀法处理萤石浮选废水的可行性。该法实现了萤石浮选废水的100％回用,做到了废水的零排放,保护了周围环境,同时还节约了水资源。     

Effect of butanol on flotation separation of quartz from hematite with N-dodecyl ethylenediamine

In order to investigate the effect of butanol on quartz flotation when N-dodecyl ethylenediamine(ND)was used as collector, single mineral flotation and artificial mixed mineral(hematite and quartz were mixed at a mass ratio of 3:2) separation were conducted in the laboratory. Experimental results indicated that addition of butanol could improve the collecting performance of ND on quartz and enhance the floatability of quartz. Best flotation recovery of quartz was obtained when butanol was mixed with ND at a mass ratio of 1:1. Moreover, the molecular structure of alcohols had a significant effect on mineral recovery. Best separation efficiency could be obtained when tert-butanol was added as it had the largest cross-sectional area. Zeta potential measurements indicated that alcohols could strengthen electrostatic adsorption between quartz and collector. Molecular dynamic simulations revealed that co-adsorption of alcohols along with ND had taken place on the quartz surface, and ND/tert-butyl combinations were more easily absorbed on the quartz surface.     

Effect and mechanism of siderite on reverse anionic flotation of quartz from hematite

Reverse flotation technology is one of the most efficient ways to improve the quality and reduce impurity of iron concentrate. Mineral processors dealing with hematite face a challenge that the flotation results of reverse flotation of hematite are poor in presence of siderite using fatty acid as collector, starch as depressant of iron minerals and calcium ion as activator of quartz at strong alkaline pH. In this work, the effect of siderite on reverse anionic flotation of quartz from hematite was investigated. The effect mechanism of siderite on reverse flotation of hematite was studied by solution chemistry, ultraviolet spectrophotometry(UV) and Fourier transform infrared spectroscopy(FTIR). It was observed that siderite had strong depressive effect on quartz in flotation using sodium oleate as collector, corn starch as depressant of iron minerals and calcium chloride as activator of quartz at strong alkaline pH. The starch was adsorbed onto calcium carbonate by chemical reaction which was formed by CO~(2-)_3 from siderite dissolution and Ca~(2+) from calcium chloride as activator of quartz and precipitated on the surface of quartz, which resulted in improving the hydrophilic ability of quartz.     

EFFECTS OF DISSOLVED MINERAL SPECIES ON THESURFACECHEMICALCHARACTERISTIC，ELECTROKINETICPROPERTYANDFLOTATIO

ＥＦＦＥＣＴＳＯＦＤＩＳＳＯＬＶＥＤＭＩＮＥＲＡＬＳＰＥＣＩＥＳＯＮＴＨＥＳＵＲＦＡＣＥＣＨＥＭＩＣＡＬＣＨＡＲＡＣＴＥＲＩＳＴＩＣ，ＥＬＥＣＴＲＯＫＩＮＥＴＩＣＰＲＯＰＥＲＴＹＡＮＤＦＬＯＴＡＴＩＯＮＢＥＨＡＶＩＯＲＯＦＦＬＵＯＲＩＴＥＡＮＤＳＣＨ...     

EFFECT OF SOLUTION CHEMISTRY ON THE FLOTATION SEPARATION OF WOLLASTONITE FROM QUARTZ

This paper deals with the flotation separation of wollas-tonite from quartz by using Na-oleate as a collector and metallic ion as anactivator. The reasons why wollastonite is difficult to separate from quartzusing Na-oleate as a collector have been studied. It is found that quartzdoes not float well in a mixture of wollastonite and quartz because of thesolution chemistry effect in a wollastonite suspension. The compositions ofthe wollastonite suspensions have been studied, and the (?)-potential of thetwo minerals have been determined to explain the solution chemistry effectson the flotation of the respective minerals.     

锡石,赤铁矿和石英体系选择性絮凝分离的研究

本文用不同分子量和水解度的聚丙烯酰胺作为絮凝剂,考察了赤铁矿、锡石和石英单矿物的絮凝特性,金属离子的活化作用,以及有铁离子存在时,锡石和石英难于分离的原因.研究结果认为:即使赤铁矿溶解的水溶液,其中虽含少量的铁离子,也能使锡石和石英活化,添加适量的 EDTA,六偏磷酸钠三聚磷酸钠和氟化钠可以防止锡石和石英的活化,有助于它们的分离.本文还对锡石、石英和赤铁矿三种产品的分离进行了研究,结果表明,三产品可用选择性新工艺将以分离,所得指标以优先絮凝流程优于混合絮凝流程,而且絮凝过程中发现,混合使用去活剂和添加少量的捕收剂效果良好.     

SDF浮选分离萤石与重晶石的作用机理

为了获得具有高度选择性的抑制药剂抑制重晶石浮游以获得优质萤石产品 ,通过光电子能谱测试分析、红外光谱分析和浮选试验 ,对抑制剂NAS(Na2 SO4 水溶液 )和HDF(苛性淀粉 )与重晶石的作用机理进行了研究 结果表明 ,NAS对重晶石的抑制作用机理是NAS中的SO2 -4 在重晶石表面发生定位吸附 ,抑制作用具有很好的选择性 ;HDF对重晶石的抑制作用机理是HDF分子在重晶石表面发生了化学吸附 ,当HDF用量大时也会抑制萤石上浮 同时 ,将NAS和HDF按一定比例混合作为一种新型调整剂 ,用SDF表示 研究表明 ,SDF对重晶石的抑制作用是NAS和HDF抑制作用的加和 SDF对重晶石具有很强的抑制作用 ,且抑制作用具有高度选择性     

Adsorption mechanism of N-laurel-1,3-diaminopropane in a hematite-quartz flotation system

The strong collecting performance of N-laurel-13-diaminopropane (ND13) with respect to quartz encouraged us to study its separation of hematite and quartz mixtures in a laboratory cell flotation test.The results show that the best separation results can be achieved when the pulp pH is 7.27 and 583 mg/L collector plus 6.67 mg/L depressant are added to the mixture. Products with 58.45%, 62.78% and 63.72%iron grades can be achieved respectively when mass ratio of hematite to quartz is 2:3, 1:1, and 3:2. The adsorption mechanism of ND13 on a quartz surface was investigated by zeta-potential and X-ray photoelectron spectroscopy measurements. The results reveal that electrostatic and hydrogen bonding adsorption take place between ND13 and the quartz surface, and that ND13 mainly interacts with the oxygen atoms on the quartz surface.