通脱法浮针辅助治疗椎动脉型颈椎病临床观察

目的:观察通脱法浮针辅助治疗椎动脉型颈椎病的临床疗效。方法:选取90例符合纳入标准的椎动脉型颈椎病患者作为研究对象,根据随机数字表法分为两组,每组45例。对照组予常规治疗(盐酸倍他司汀注射液静脉滴注联合颈椎牵引治疗),观察组在对照组治疗基础上联合通脱法浮针治疗。观察两组治疗前后的临床症状(肩颈痛、眩晕、头痛)评分、生物力学指标(颈椎屈伸活动范围、颈椎弧度、颈椎水平位移范围)、椎动脉血流动力学[基底动脉(BA)、左椎动脉(LVA)、右椎动脉(RVA)平均血流速度]及不良反应,比较两组临床疗效。结果:治疗后,观察组总有效率为95.56%,对照组总有效率为80.00%,观察组疗效优于对照组(P<0.05);观察组临床症状(肩颈痛、眩晕、头痛)评分均低于对照组(P<0.05);观察组颈椎屈伸活动范围、颈椎弧度均大于对照组,颈椎水平位移值低于对照组(P<0.05);观察组BA、LVA、RVA平均血流速度均快于对照组(P<0.05);两组均未出现明显不良反应。结论:通脱法浮针联合常规治疗能够有效减轻椎动脉型颈椎病患者临床症状,恢复颈椎生物力学平衡,改善椎动脉血液循环,提升治疗效果,且安全性高。

燃煤微生物预处理浮选脱硫的试验研究

研究了煤样中黄铁矿硫的赋存状态以及影响生物预处理浮选脱除煤中硫的几个因素 ,如不同的煤粒度、不同驯化菌种及不同的细菌组成等 ,指出煤样中黄铁矿硫的赋存状态适合用微生物预处理浮选脱硫的方法脱除 ,微生物预处理浮选脱硫是一种有效的洁净煤技术 ,全硫脱除率可达到 4 2 % ·同时指出煤驯化接种二次的菌液脱硫效果要比用 9k培养基培养的菌液和用煤驯化接种一次的效果要好 ,但是差别不是太大 ;细菌的分泌物和细菌细胞在浮选脱硫中是共同起作用的·

还原剂法强化煤浮选脱硫的研究

为了拓宽电化学法在煤脱硫中的应用,研究了还原剂法脱硫的几个影响因素及其脱硫机理,利用X射线衍射对还原剂法处理前后的黄铁矿样进行了分析。结果表明:影响还原剂法脱硫的因素的次序为反应时间>pH值>还原剂用量>反应温度;确定了最佳反应条件,反应时间为20 min,pH=6.65,还原剂(连苯三酚)用量为75 mg,反应温度为30℃;在较优实验条件下,其脱硫率可达到60%。研究表明,还原剂法能使煤与黄铁矿颗粒表面朝不同的方向改性:提高了煤的可浮性,降低了黄铁矿的可浮性;同时还原剂法还能改善煤质,提高煤的燃烧值。

电加热回转窑在白钨精矿焙烧脱浮中的应用研究

针对河南某地区低品位白钨精矿采用了不同烘干系统对白钨精矿进行脱浮试验,在旋转闪蒸机、电磁螺旋干燥机、微波干燥机、燃煤回转窑、电加热回转窑这5种系统中,对比除尘系统、脱浮效果、焙烧后精矿浸出效果,确定了最佳脱浮路线和电加热回转窑的新工艺。钨精矿脱浮后COD可控制在200 mg/L以下,水分在0.01%以下;XRD表征氟在焙烧前后均以氟磷灰石形态存在;浸出渣WO3含量为0.091%,总体WO3回收率为99.76%,压煮回收率提高0.3%,并使该工艺在白钨精矿脱浮的工业生产中得到应用。

机械自浮式脱气器的设计与应用

传统脱气器一般利用丝杠、铰链等工具来调节脱气器高度,而当钻井液排量、密度发生变化时,需要人工调节,从而导致脱钻井液量不稳定,影响气测录井资料的准确性。为此,研发了机械自浮式脱气器,对不同密度钻井液配置不同质量配重块,随着钻井液密度增大或减小,适量增减配重块,钻井液排量变化时,可实现脱气器自动升降,脱气器脱钻井液量基本恒定,有效降低了钻井液排量、密度变化对气测值的影响。与传统脱气器相比,机械自浮式脱气器不改变传统脱气器电动机及供电方式,不改变传统脱气器结构,即可实现脱气器高度自动调节,其成本低廉,降低了劳动强度,提升了气测录井资料质量。

KFG型防松脱浮轨减振扣件在减振降噪上的应用及试验分析

随着城市交通、生活品质的发展和提高,城市轨道交通的振动和噪声问题越来越引起人们的重视。因此控制轨道交通噪声和振动是改善乘客舒适性和环境保护的重要课题。减小列车与轨道之间的振动向周边地面建筑的传播,在轨道交通区间采取相应的减振降噪措施,已成为轨道交通系统建设、维护、治理、升级中的一个关键。本文主要介绍了KFG型防松脱浮轨减振扣件、DZIII型扣件和双层非线性减振扣件系统,并且详细的介绍了隧道内和地面建筑的振动测试分析方法。通过南昌地铁一号线减振降噪改造工程实践,现场测试分析了KFG型防松脱浮轨减振扣件、DZIII型扣件和双层非线性减振扣件系统条件下的振动值,通过对比分析,KFG型防松脱浮轨减振扣件相对于DZIII型扣件减振效果达到10.66dB,减振效果显著,达到了减振降噪要求。

探讨电加热回转干燥脱浮炉在白钨选矿厂的应用实践

本文阐述了一种干燥脱浮炉在白钨选矿企业的应用,解决了白钨精矿脱浮后有机物含量仍高的问题,攻克了冶炼浸出环节、萃取环节回收率略低的难题,实现了绿色、节能、高效的新型“选冶结合”加工理念。

某锡石多金属硫化矿脱硫试验的研究

锡石多金属硫化矿的脱硫效果直接影响后续锡回收的相关作业,根据矿石的特性,研究了锡石多金属硫化矿高浓度浮选脱硫。研究表明粗颗粒浮选中高矿浆浓度比低矿浆浓度浮选有较大的优势,通过中矿单独处理,中矿未返回粗选作业,减少中矿循环量,简化浮选流程,加快硫化矿浮选速度,提高脱硫效率。粗选高浓度浮选脱硫闭路试验得到精矿中锌、铅回收率分别为94.75%、85.52%。

包钢白云鄂博铁矿磁铁矿选矿工艺研究

在分析包钢白云鄂博铁矿原选厂工艺存在问题的基础上,通过试验研究论证,在新建选厂碎矿工艺上应用高压辊磨机,在磨选工艺上以阶段磨选、中矿再磨选取代原连磨选工艺的科学性和合理性。

某钨选厂粗精矿分选试验研究

某钨选厂粗精矿采用分级粗粒枱浮硫化矿、细粒浮选硫化矿,浮选尾矿采用磁选优先选出一部分黑钨单体,分选尾矿磨至目的矿物单体解离后,先浮选硫化矿,再浮选白钨,重选分离锡石,所有硫化矿集中进行铜硫分离的工艺对粗精矿中的目的矿物进行分选。通过该工艺流程有效地分离了粗精矿中的钨、锡、铜、硫。获得钨精矿WO3品位≥60%,回收率≥88%,铜精矿Cu品位≥24%、回收率≥90%,锡精矿Sn品位≥45%、回收率≥70%。

Flotation separation of Xixia andalusite ore

The flotation behavior of Xixia andalusite was studied with different collectors.The tests were conducted with a pure andalusite sample in micro-flotation cell and then with an ore sample in a mechanical flotation cell.The surface charge was measured on pure andalusite sample and the isoelectric point（IEP） was found to be pH 5.2.Andalusite is floated with an amine collector above IEP where mineral surface is negatively charged.In contrast,an alkyl sulfonate collector（sodium dodecyl benzene sulfonate） is effective in the pH range where andalusite surface is positively charged.Furthermore,andalusite is floated with oleate in neutral and mildly alkaline pH values.55.3% Al2O3 is produced with 75.6% andalusite recovery when using the alkyl benzene sulfonate collector.Starch is found to be an effective depressant for gangue minerals in alkyl benzene sulfonate flotation.Moreover,slimes are found to have an adverse effect on the flotation of andalusite.Therefore,pretreatment by desliming and pre-float（to remove carbonaceous species） prior to andalusite flotation is necessary.

技术创新与LCD的发展

液晶显示器(LCD)以其重量轻、厚度薄、低电压、无辐射的特点得到了消费者的青睐。近年来,伴随着LCD尺寸的增大,通过浮脱工艺减少使用掩模数量,采用滚轮印刷、纳米压印、喷墨等技术,形成了新的面板制造技术,降低了产品价格,极大地推进了LCD的普及。本文主要从阵列技术创新的角度,浅谈LCD的发展。

Separation behavior and mechanism of hematite and collophane in the presence of collector RFP-138

The reverse flotation separation performance and mechanism of hematite and cellophane in the presence of RFP-138, a newly synthesized dephosphorization collector, were studied. Reverse flotation tests on monominerals and artificially mixed minerals of hematite and collophanite show that, this anionic collector performs excellently in reducing the phosphorus content in hematite. It can decrease the content of P in artificially mixed minerals from 1.05% to 0.12% and achieve the TFe recovery rate of 91.30%. The chemical behavior of solution and infrared spectra of RFP-138 were investigated to explore the selective collecting mechanism of RFP-138 to these two minerals.

Involvement of cAMP in ABA Signal Transduction in Tobacco Suspension Cells

Abscisic acid (ABA) plays an important role in plant growth and developmental processes. Although some ABA signal molecules, such as cADPR, Ca2+, etc., have been reported, there. was no evidence proving the involvement of cAMP in A-B-A, signal transduction. In this present study, the constructed gene ( rd29A-GUS) was transformed into Nicotiana tabacum, and calli was induced from the transgenic plant. The suspension cells obtained from the callus grew well and uniformly. Treatment of the suspension cells with ABA led to an increase in GUS activity, indicating that these transgenic suspension cells are useful for the study of ABA signaling. Addition of nicotinamide (cADPR inhibitor) or U-73122 (phospholiphase C inhibitor) could only partially inhibit the increase of GUS activity elicited by ABA. The inhibitory effect of nicotinamide was enhanced by application of K252a (inhibitor of protein kinase). Treatment of the suspension cells with 8-Br-cAMP, a membrane-permeable analogue of cAMP, could partially replace the effect of ABA. Furthermore, intracellular addition of IBMX (phosphodiesterase inhibitor) mimicked die effect of exogenous cAMP on the deduction of expression of rd29A promoter. These results suggested that cAMP was an important messenger in ABA signal transduction in tobacco suspension cell.

Research progress on desulfurization technology of high-sulfur bauxite

Bauxite is the main raw material of the alumina industry.However,high-sulfur bauxite constitutes a relatively large proportion of bauxite resource in China.Excessive sulfur impurities in bauxite have significant impact on the Bayer process,such as corrosion of equipment and pipelines,increased consumption of alkali,and difficulties in sedimentation of red mud particles after digestion.As the mainstreams of bauxite desulfurization technologies,the bauxite pre-desulfurization(roasting,electrochemistry,biology,flotation,etc)and Bayer process desulfurization(oxidation and precipitation)need to be fully understood for the further improvement of desulfurization performance.Here,an in-depth review on their mechanisms and advantages/disadvantages is presented.

Research on Factors Affecting Flotation and Desulfurization of Coal by Electrochemical Method

Influence of factors such as potential of electrolyte, electrolyzing time, concentration of electrolyte, and pH value on flotation and desulfurization of coal was researched. The result shows that the electrochemical reduction can enhance the desulfurization effect and increase the yield of clean coal under certain conditions. So it is an effective method.

Comparisons between Flotation Deinking Abilities of Newsprint Paper by Using Enzyme and Chemicals

The aim of this research is to study the floatation deinking abilities of black mold enzyme and chemicals in newsprint paper application. In this experiment, the properties of deinked pulp from three different additives--chemicals, black mold enzyme, and chemicals together with black mold enzyme, are studied. The first part of the experiment was to find the optimal amount of chemicals and the optimal pH through the use of sodium hydroxide and surfactant. As a result, 0.2% of sodium hydroxide and 0.4% of surfactant on oven dried weight at pH 9 was found to be the optimal condition for the deinked pulp to yield the lowest ERIC （effective residual concentration） and the highest brightness. The second part of the experiment was to find the optimal amount of black mold enzyme used in the deinking process. As a result, the optimal condition for deinked pulp to retain the lowest ERIC and the highest brightness was 100 ppm of black mold enzyme and 10 minutes of enzyme reaction time. The third part of experiment was to study the de-inking ability of black mold enzyme and chemicals. Consequently, with 30 min of chemicals reaction time and 60 min of black mold reaction time, the deinked pulp retained low ERIC but higher brightness.

Thermodynamic Analysis of Desulfurization of Fine Coal by Electrochemical Reduction Flotation

Problems in desulfurization of coal by electrochemical reduction is analyzed and calculated. The result shows that 1 ) the △rGm function of the reaction of pyrite into FeS and the modifying reaction decreasing the oxygenous functions on coal surface is smaller than zero in a spontaneous reaction, and greater than zero in a non-spontaneous reaction; 2) the △rGm value can be adjusted by pH and the dosage of electrolyte to make it be greaterthan zero , which is favorable for the modifying reaction and useful for desulfurization of coal. The research has provided a theoretical foundation for determining reasonable technical parameters of desulfurization。

EXPERIMENTAL STUDY OF DESULFURIZATION OF ZHONG LIANG SHAN HIGH SULFUR COAL BY FLOTATION

Emission of large amount of SO2 from combustion of liigh sulfur ctal causes serious envitonmcntai pollution. Pre-combustion desunrization of high sulfur coal has become a necessity.Thts paper reports test results of fine coal dcaulfurization with different flotation technology and theeffect of pyrite depressant. Test work showed that when the coal sample from Zhong Liang Shanwas processed with a Free Jet Flotation Column its pyritic sulfur content was reduced from 3.08%to 0. 84%, with 72. 22% recovery ofcomhustiblc matter in clean coal. The coneept of Desulfuriza tion Efficiency Index E for comprehensive evaluation of desumirhation process is proposed, whichis deffeed as the product of the ratio of sulfur content reduction of clean ctal and the recovery ofcomhustihle matters.

Effect of a cyclonic flotation column on the separation of magnesium from phosphate ore

This study was performed to investigate the effects of the cyclonic separation mechanism on the removal of magnesium from phosphate ore. An analysis of the particle-bubble collision mechanism in a cyclonic force field was used to design two different pulp circulation systems for a cyclonic-static micro-bubble flotation column （FCSMC）. Experiments comparing the two conditions were then conducted. Size analysis of the feed and separated products was conducted with a BXF cyclone size analyzer. The results show that about 34.60% of the total MgO content in the feed exists in the -10 μm fraction. This demonstrates that magnesium removal from phosphate ore has the characteristics of a micro-fine particle flotation problem. Under conditions of cyclonic circulation the MgO level of the concentrate is 1.74g, which is lower than that obtained from the column operated in direct-flow circulation by 0.34%, These results indicate that the cyclonic circulation mechanism of the FCSMC can promote removal of micro-fine particles containing magnesium. This is attributed to the function of surface flotation and to the reduction of the lower separation limit under conditions of cyclonic circulation.