有机硅阳离子在胶磷矿反浮选脱硅中的应用研究

以十二胺和三甲基氯硅烷为原料合成了一种有机硅阳离子表面活性剂,并以其为捕收剂进行中低品位胶磷矿反浮选脱硅试验,结果表明,在入选原矿P2O5品位为20.63%的条件下,经过双反浮选获得了P2O5品位为31.12%、回收率为73.13%的磷精矿。     

CF-ZP01表面活性剂在磷矿浮选中的应用

研究CF-ZP01表面活性剂在磷矿浮选过程中的作用。结果表明,该表面活性剂具有较强的活化性能,能增强捕收剂YP2-3的捕收性能和选择性能;在磷矿浮选过程中通过吨原矿添加0.05 kg的表面活性剂,吨原矿的捕收剂用量可降低0.5 kg,并且可以获得w(P2O5)28.18%、w(MgO)0.86%的合格磷精矿,精矿产率达72.17%。     

湖北某胶磷矿浮选工艺研究

湖北某胶磷矿为难选磷矿石,以该胶磷矿为浮选试验对象,以油酸皂为主捕收剂,配合可产生协同作用的表面活性剂进行浮选试验。结果表明,阴离子表面活性剂与非离子表面活性剂组合后添加到脂肪酸类捕收剂中,可显著提高磷精矿的品位和回收率,对原矿品位为21.76%的胶磷矿进行一次粗选,磷精矿品位可达27%以上,回收率达91.5%以上。     

云南某地低品位胶磷矿浮选试验研究

针对云南某地低品位硅钙质胶磷矿的矿石性质,配以新型的ZQ系列捕收剂,采用常温正反浮选工艺及正浮选后酸浸工艺分别得到精矿P2O5品位30.18%、MgO质量分数0.79%、回收率87.99%和精矿P2O5品位28.42%、MgO质量分数0.67%、回收率64.71%的磷精矿。实现了磷矿物与脉石矿物的有效分离。     

WF-01捕收剂在沙特磷矿选矿试验中的应用

为了提高沙特Al-Jalamid磷矿的磷资源利用率,利用瓮福磷矿生产的WF-01捕收剂对Al-Jalamid磷矿进行了选矿试验,结果表明:WF-01捕收剂对Al-Jalamid磷矿具有广泛的的适应性,在进行上、中、下层混合矿选矿时,精矿品位P2O5达33%以上,回收率达80%以上.     

新型脱镁捕收剂FC-2B浮选云南海口磷矿试验研究

针对云南海口磷矿进行了分离胶磷矿和白云石的浮选试验研究,实际矿物浮选试验结果表明,FC-2B捕收剂能有效分选胶磷矿与白云石。在入选原矿P2O5品位为19.16%,MgO质量分数为4.67%的情况下,获得的磷精矿P2O5品位为28.54%,回收率为80.40%,MgO质量分数为0.80%,MgO排除率为90.52%。纯矿物试验研究了FC-2B捕收剂对胶磷矿和白云石选择性的差异,并借助红外光谱测试证明该捕收剂在白云石表面主要为牢固的化学吸附,其对白云石表现出较好的选择性。     

某硅钙质磷矿反浮选碳酸盐脉石矿物捕收剂应用研究

以BL作捕收剂,对某硅钙质磷矿石进行反浮选脱碳酸盐脉石矿物试验,获得了含P2O532.71%,回收率达到82.93%的磷精矿,实现了胶磷矿与白云石的有效分离.     

胶磷矿双反浮选工艺研究

对湖北某地镁硅含量较高的难选胶磷矿采用阴离子捕收剂反浮镁、阳离子捕收剂反浮硅的双反浮选工艺,取得了磷精矿P2O5品位32.51%、回收率91.23%、MgO含量0.87%、R2O3含量2.37%的良好指标,实现了胶磷矿与白云石、长石等杂质矿物的有效分离.     

贵州某磷矿反浮选捕收剂研究

针对几种植物油脂肪酸进行了浮选性能对比研究,筛选出性能较优的菜籽油脂肪酸,通过改性与复配,得到新型脱镁捕收剂EM-LS-01。该药剂用于贵州某低品位高镁磷矿一粗一扫反浮选工艺流程中,获得了P2O5品位为30.25%,MgO质量分数为0.99%的磷精矿,P2O5回收率达90.63%,达到了高效选别磷矿的目的。     

复配抑制剂在磷矿反浮选中的应用

对四川某磷矿进行反浮选试验,采用原有抑制剂H2SO4,可获得磷精矿P2O535.28%,MgO0.87%,回收率71.98%的指标;而采用H2SO4和TXZ作为复配抑制剂,可获得磷精矿P2O534.11%,MgO0.92%,回收率81.59%的指标,回收率高出9.61%,显然,采用H2SO4和TXZ复配抑制剂,效果明显好于单一使用H2SO4作为抑制剂。另外延长扫选时间,可以提高精矿质量。     

乙烯酮(双乙烯酮)下游产品废水的治理技术

乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。     

Semi-empirical equation of state of metals. Equation of state of aluminum

A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO₂) of density 0.08 g/cm³. __________ Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008.     

水泥水化热测定方法综述

水泥水化热是中、低热水泥和核电工程用水泥的一项关键的技术指标。全球范围内测定水泥水化热的方法有溶解法、直接法/半绝热法、等温传导量热法三种。本文总结了中、美、欧相关方法标准,对其测试原理、仪器设备、试验过程等方面进行了比对,并对其在领域的应用做了简单的概括。     

几种乙炔加压设备性能的比较

阐述并比较了几种加压设备在乙炔加压清净过程中的性能和特点。     

三种煤样燃烧热的测定

本文通过三个厂家提供的三种煤样燃烧热的测定,由测定结果综合得出3号煤样燃烧最完全、燃烧热也最大,是三个煤样中最好的一种。     

Calorimetric and Computational Study of Enthalpy of Formation of Diperoxide of Cyclohexanone

A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out.     

气化给煤系统故障分析

气化给煤装置自投运以来,出现了气化煤仓堵煤、称重给煤机输送皮带因跑偏而损伤以及清扫装置故障频繁等问题,多次造成气化系统减负荷运行。通过对出现的各种问题进行分析,找到了产生这些问题的原因,并有针对性地采用配煤和改进清扫链等措施,使出现的问题得到了极大的改善。     

小议汽车涂装工艺设计对涂装成本的影响

论述了涂装工艺设计对涂装设备投资、涂装生产成本的影响。     

Measurement of the gradient of viscosity with composition of mixtures of non-ideal gases

A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%.     

醋酸纤维素取代基分布与性质的关系

分析了以吡啶为溶剂的醋酸纤维素的13C-NMR核磁共振谱,得出了三种不同位置羟基的取代度。结合X—射线和DSC分析,初步说明具有相同取代度但未经水解和经过水解的醋酸纤维素(CA) 性质上的差异是由于三个羟基上的取代度分布不同及消晶程度差异所致。