α-氯代脂肪酸柠檬酸单酯捕收剂合成及应用研究

工业菜籽油下脚料经皂化、酸解、氯化、酯化等单元反应合成了一种新型α-氯代脂肪酸柠檬酸单酯浮选捕收剂,进一步与其中间体α-氯代脂肪酸钠配比得到一种复合捕收剂,用于云南某中低品位难选磷矿的浮选试验,结果表明,相对于传统的脂肪酸类磷矿浮选捕收剂,该捕收剂的水溶性和常温浮选性能都得到明显改善,且药剂用量少,浮选工艺简单;其研究与应用开发对降低中低品位磷矿加温浮选选矿成本具有重要意义。     

中低品位磷矿浮选药剂研究现状与展望

我国磷矿资源丰富,但品位普遍较低,分选难度较大.浮选是磷矿选矿中最主要的方法,其中浮选药剂对浮选指标起着至关重要的作用.本文从捕收剂和调整剂两大方面对国内外中低品位磷矿浮选药剂进行了介绍和总结.磷矿浮选捕收剂主要包括脂肪酸类捕收剂、胺类捕收剂以及两性捕收剂.其中,捕收剂的混合使用在处理中低品位复杂型磷矿时体现出良好的选别效果,因此将会成为以后主要研究方向.调整剂主要包括介质调整剂和抑制剂,选择合适的或新型调整剂有助于进一步提升选磷效果.因此,在未来磷矿浮选药剂发展中,研发新型、高效、高选择性、耐低温、经济环保型单一捕收剂或混合捕收剂和调整剂将成为未来选磷浮选药剂的主要发展趋势.本文可为中低品位磷矿浮选药剂的研究提供参考依据.     

新型药剂MG-7用于胶磷矿反浮选脱镁的研究

采用MG-7作为捕收剂, 硫酸、磷酸作为抑制剂, 对宜昌地区中、低品位胶磷矿进行了反浮选脱镁试验研究。常温条件下, 原矿P₂O₅品位20.65%, MgO含量7.95%时, 经一粗一扫得到磷精矿P₂O₅品位29.92%, MgO含量0.93%, 回收率92.55%的良好指标, 表明MG-7对胶磷矿和白云石具有很好的分选效果。     

DZX-9捕收剂浮选冕宁低品位氟碳铈矿试验研究

摘要:氟碳铈矿型稀土矿浮选,一般需脱泥预处理后用芳香烃羟肟酸或改性羟肟酸等捕收剂在一定条件下浮选可获得合格的氟碳铈精矿[1-3]。四川冕宁三岔河低品位氟碳铈矿型稀土矿含泥高,REO品位仅为1.65%,氟碳铈矿呈不等粒嵌布,矿物组成相对复杂。以弱磁选-重选后所得到的粗精矿（简称重精矿,REO品位为3.73%）为研究对象。研究结果表明,采用常规浮选捕收剂难以获得满意效果,采用自研DZX-9为捕收剂,在pH=8~9,碳酸钠、水玻璃为调整剂,经一次粗选、一次扫选和二次精选,实验室小型浮选闭路试验可获得精矿产率为5.70%,REO品位为60.31%,REO回收率为92.16%较好的技术指标。      

几种改性菜籽油下脚料磷矿捕收剂浮选性能比较

为减轻由于废弃菜籽油下脚料堆存所带来的环境污染及降低磷矿浮选成本,以植物油废料菜籽油下脚料为基础,经改性制得新型磷矿捕收剂,对甘肃某低品位高硅磷矿进行了浮选试验。1次正浮选试验结果表明:改性捕收剂均体现出了较好的选择性,其中CY04为捕收剂可获得P_2O_5品位为25.91%的磷精矿,但该捕收剂回收率较低,仅为31.06%,需复配增效剂以提高回收率。     

镧系金属-苯甲羟肟酸有机配合物对萤石和方解石的捕收性能研究

萤石、方解石等含钙矿物表面吸附位点同为钙质点, 导致脂肪酸、羟肟酸等常用氧化矿捕收剂对它们的选择性较差, 针对该问题提出利用含钙矿物阴离子的差异性来设计金属离子配合物捕收剂的思路。利用Ce-BHA配合物对萤石与方解石质量比1 GA6FA 1的人工混合矿进行一次粗选浮选试验, 最终可得萤石精矿CaF₂品位78.92%、回收率74.77%, CaCO₃品位11.08%、回收率24.23%, 分离效果良好。与单独使用BHA作捕收剂相比, 浮选精矿CaF₂品位提高约26百分点, 回收率提高约50百分点, 表明该配合物捕收剂对萤石的选择性好。通过量子化学计算了多种镧系金属离子与苯甲羟肟酸(BHA)的作用情况及其在萤石、方解石表面的吸附行为, 结果显示最佳的配合物捕收剂组合为Ce-BHA, 与纯矿物浮选试验结果相符。      

低品位细粒锡石浮选试验研究

针对矿石磨矿后锡石泥化严重、重选回收率低的问题,对重选给矿-74μm粒级进行了锡石浮选试验研究,以Y-11作硫铁矿活化剂、MA作硫铁矿的捕收剂进行脱硫,碳酸钠为pH调整剂,水杨羟肟酸、氧肟酸、P86为锡石捕收剂,一次浮选可获得锡粗精矿品位1.81%、作业回收率80.86%,再用浮选柱精选可获得锡精矿品位10.41%、作业回收率为84.13%的良好指标。     

阳离子捕收剂在磷矿反浮选脱硅中的研究进展

反浮选脱除磷矿中硅铝杂质是提高磷精矿质量、充分利用中低品位胶磷矿的一种有效方法。详细介绍了近年来国内磷矿反浮选阳离子捕收剂及其作用机理,分析了现有阳离子捕收剂存在的不足,并指出了今后的研究方向。     

捕收剂预先混合对新疆某羟硅铍石浮选的影响

针对新疆某含铍（BeO）0.45%的羟硅铍石浮选中,单一捕收剂选择性较低、精矿品位不高的问题,试验采用油酸钠和苯甲羟肟酸组合捕收剂。通过浮选条件试验的优化,结果发现,当组合捕收剂用量为1 000 g/t时（油酸钠GA6FA苯甲羟肟酸质量比为9 GA6FA 1）,二者预先混合后加入,浮选效果最佳,经过四次开路精选,能够得到BeO品位10.22%的铍精矿,富集效果较好,可以为类似的羟硅铍石资源回收提供有效的技术支撑。混合药剂的溶液化学分析表明,在二者混合的水溶液pH值8.25左右时,苯甲羟肟酸分子组分和离子组分浓度相当,这可能是产生预先混合协同效果的原因。      

阴离子捕收剂MG常温反浮选铁矿的应用研究

阴离子捕收剂MG药剂可以在常温反浮选铁精矿中的含硅矿物。MG药剂浮选繁峙腾飞矿业公司铁矿指标为:精矿铁品位65.18%,回收率92.71%。尾矿铁品位为25.52%,与原来使用捕收剂相比.回收率提高7.62%,尾矿品位降低9.96%,浮选矿浆温度从35℃降到20～25℃,试验和生产证明MG药剂是一种良好常温浮选阴离子捕收剂。该药剂已在多家矿山得到应用。     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

China rare earth market review

正November 1~10,2014Chinese rare earth market was still inactive.Demand for rare earth products was weak.Consumers took a wait-and-see attitude for lower price.As it was an off season for rare earth products,it was expected that prices of rare earth could continue turbulence at the bottom in short terms.Due to a sharp drop,demand for rare earth from downstream recovered.Affected by new energy vehicles,wind powder and energy-efficient appliances,production of rare earth permanent     

China rare earth market review

正August 1~10,2014 There was some good news in rare earth industry recently.Restructuring plans of rare earth groups led by Baotou IronSteel Group and Xiamen Tungsten Group respectively have been approved by MIIT.And rare earth storage policy,which had been expected for a very long time,has been launched officially.Pushed by the good news,rare earth price started to rebound since August 5.Price of didymium oxide and dysprosium oxide rose about 1% to 2%,averagely.About 10% of     

China rare earth market review

正July 1~10,2014Due to weak demand from downstream industry and slow transactions,rare earth market remained weak and price of rare earth products continued to decline.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,     

New energy vehicle:an opportunity for rare earth magnets

<正>Extracted from Securities Guide 1.Popularity of new energy vehicles—an irresistible market trend1.1 Progress of new energy vehicles Chinese Premier Li Keqiang said recently on a visit to Xi'an BYD Autos that new energy vehicles,especially new energy bus,can lessen environment and noise pollution.He encouraged the use of new     

Brief news

正Corun invested another 50 million yuan in power battery for HEV Hunan Corun announced on 27 June that they had signed the cooperation agreement to jointly built Corun(Shaoxing)Autos Power Battery System Co.,Ltd.in Shaoxing Binhai New City.According to the announcement,total registered