LHGC型立环高梯度磁选机及其在陶瓷原料长石矿分选中的应用

我公司开发生产的LHGC型高梯度磁选机是一种节能、环保、有强制油冷却、有脉动作用的新型立环高梯度磁选机。该磁选设备已于2011年由9位专家做了技术鉴定。专家一致认为,这是一种国内外首创的磁选设备,其技术性能达到了国际领先水平。该磁选设备可以广泛地应用于金属矿物和非金属矿物的分选,尤其适用于陶瓷原料长石矿物的除铁提纯,长石经除铁提纯后其技术指标达到优良,经济效益十分显著。     

Efficiency of High Gradient Magnetic Separation Applied to Micrometric Magnetic Particles

This article presents two prototypes of laboratory magnetic separators that generate high gradient magnetic fields. Such a field is created in a separation cell via steel wool. The efficiency of separators was tested on a water suspension containing weakly magnetic Fe₂O₃ nano/micro-particles, prepared in three size fractions in a size range of 60 nm – 10 μm. The separation process was evaluated via optical transmittance of the suspension before and after sequential separation processes. Repeated separations on the same sample exhibit an asymptotic trend that results in the conclusion that it is not possible to trap all solid content. According to the decrease of solid particles concentrations during cyclic separation we set the efficiency of the process. It is maximally 46% for fine fraction, 65% for medium fraction, and 40% for coarse fraction after infinity separation cycles.     

LHGC型立环高梯度磁选机及其在陶瓷原料长石矿分选中的应用

我公司开发生产的LHGC型高梯度磁选机是一种节能、环保、有强制油冷却、有脉动作用的新型立环高梯度磁选机。该磁选设备已于2011年由9位专家做了技术鉴定。专家一致认为,这是一种国内外首创的磁选设备,其技术性能达到了国际领先水平。该磁选设备可以广泛地应用于金属矿物和非金属矿物的分选,尤其适用于陶瓷原料长石矿物的除铁提纯,长石经除铁提纯后其技术指标达到优良,经济效益十分显著。     

Desulfurization and Deashing of Solvent Refined Coal (SRC-I) by High Gradient Magnetic Separation Techniques

Abstract

A pilot-scale high gradient magnetic separations (HGMS) system was assembled to investigate the magnetic separation of ash-forming solids and inorganic sulfur from liquefied coal. The liquefied coal studied was a diluted intermediate product obtained from the DOE-sponsored Tacoma SRC-I pilot plant (50 t/d coal capacity). The magnetic characteristics and particle size distribution of the Tacoma SRC-I liquefied coal were optimized for removal by HGMS. The effect of the following magnetic separator parameters upon the deashing the desulfurization of the diluted liquefied coal was considered: matrix packing density, temperature, applied magnetic field, dilution of and residence time of liquefied coal feed, backflushing of saturated separator parameters upon the deashing and desulfurization of the diluted liquefied model which satisfactorily accounts for HGMS performance was developed. The HGMS system was observed to remove over 90% of the ash-forming materials and inorganic sulfur over a wide range of operating conditions. These removals were increased to 97 and 95%, respectively, with residence times greater than 6 min.     

LHGC强制油冷立环高梯度磁选机在石英砂和长石选矿中的应用

石英砂与长石是玻璃生产中常用的两种矿物原料,氧化铁是其中的主要有害成分,磁选是去除氧化铁的主要手段。本文论述了特制立环高梯度磁选机在这两种矿物原料除铁提纯中的应用和达到的主要技术指标,并对获得的经济效益作出了简要评价。     

高梯度磁分离铬盐浸出浆液中的铬渣--II.实验研究

应用高梯度磁分离装置对铬盐浸出浆液中的铬渣进行了实验分离,测量了有效分离时间与流体粘度、磁场强度和流体流速之间的关系. 实验结果显示,当对理论模型作适当修正后,实验测量结果与模型计算结果基本一致.     

高梯度磁分离铬盐浸出浆液中的铬渣-Ⅱ.实验研究

应用高梯度磁分离装置对铬盐浸出浆液中的铬渣进行了实验分离,测量了有效分离时间与流体粘度、磁场强度和流体流速之间的关系. 实验结果显示,当对理论模型作适当修正后,实验测量结果与模型计算结果基本一致.     

Separation of Phosphorus and Magnetic Mineral Fines from Siderite Reductive Ore by Applying Magnetic Flocculation

The characteristics of siderite reductive ore and the ultrafine grinding-magnetic flocculation separation (MFS) of this ore were investigated in the present work. The results indicated that the iron phase in the raw ore was predominantly metallic iron with an iron particle size below 30 μm, and the phosphorus compound was apatite. By applying MFS to siderite reductive ore containing 37.14% Fe and 0.52 P, a concentrate assaying 66.37% Fe and 0.19 P with 74.32% recovery was produced. The iron recovery increased by 5.77% compared with the results of the conventional magnetic separation. The high efficiency in phosphorus removal and iron recovery achieved by the MFS process may be attributed to the adequate liberation of iron particles and the increase in magnetic force on the iron mineral fines in the form of flocs in a magnetic field.     

小型高速柴油机燃用精细水煤浆燃料供给系统的改造

通过从精细水煤浆的特性入手,分析了原供给系统存在的问题,提出了解决方案——双功能供给系统,并通过台架试验的数据分析得出双功能供给系统的经验公式。     

Application of Equilibrium Density Gradient Sedimentation to the Separation and Purification of Proteinpolysaccharides

Abstract

Mixtures of proteinpolysaccharides can be effectively separated by equilibrium sedimentation of solutions containing high concentrations of salts such as cesium chloride.

The method is most effective when the buoyant densities of the constituent molecules differ widely. Degradation of the proteinpolysaccharide macromoleculcs is minimized because degradative enzymes readily sediment away from the denser carbohydrate-containing substances. The macromolccules are subjected to conditions no more severe than exposure to high salt concentrations. The recovery of material is always quantitative and all components are subjected to identical treatments. By sedimenting dilute solutions of proteinpolysaccharides to equilibrium in cesium salt density gradients, separation and concentration can often be effected in a single step.

The method is less suitable when the constituent proteinpolysaccharides are polydisperse or of small molecular weight. In the case of very complex mixtures of proteinpolysaccharides, i.e., extracts from arterial tissue, the method may be useful for preliminary separations only.

The method is time-consuming and can be expensive with regard to materials and equipment. However, as most laboratories possess high-speed preparative centrifuges and cesium salts can be recovered after use, these problems are not insurmountable.     

超纯水在稳态强磁场实验装置中的应用

强磁场实验装置是国家发改委批准的国家＂十一五＂重大科技基础建设项目之一,是一项国家大科学工程,具有国际先进水平,可为众多学科领域的科学研究提供强磁场极端实验环境和实验手段的大型综合科学实验装置。中国科学院强磁场中心将与美国、法国、荷兰、日本并列成为世界五大稳态强磁场科学中心之一。超纯水冷却系统作为强磁场实验室的电源、水冷、低温、控制系统等四大技术装备系统重要组成部分,主要为40T（特斯拉）级稳态强磁场实验装置的水冷磁体和20MW（兆瓦）高功率高稳定度电源提供去离子水冷却系统。此外,为保证水质（电阻率）稳定性还专门设置了循环提纯系统。本项目中去离子水冷却系统充分体现了环保和节能的设计思路,其中包括反渗透系统（RO）浓缩水回收利用、NaOH自动精确投加,以及无酸碱废液排放的电再生去离子装置（CEDI）等。     

煤全组分的族分离及应用展望

从煤和石油的加工利用方式出发,比较了当前煤和石油加工转化的主要特点,结合煤结构研究的现实需要,论述了进行煤全组分族分离研究的必要性及其理论与应用价值。介绍了族组分分离方法的进展及存在问题,提出了用萃取与反萃取法进行煤全组分族分离的新工艺。     

高温煤焦油的应用现状分析

文章针对我国高温煤焦油的应用现状进行了调研,对目前高温煤焦油加工应用的三个主要方面：直接应用,提取化学品和加氢做了详细阐述。通过对高温煤焦油不同应用方向的工艺,技术及应用现状的分析,提出了国内高温煤焦油产业存在的一些问题。     

电场与磁场在非均相分离中的应用技术综述

分别概述了在石油、化工和矿场领域中,电场和磁场在非均相分离中的应用现状和进展。首先介绍了电脱水(液-液分离、固-液分离)、电除尘(气-固分离)等技术及其原理,分析了影响其分离性能的诸多因素。例如,对于电脱水,影响因素主要包括:电场是否为匀强电场、电场强度及电场方向等;对于电除尘包括:除尘颗粒的性质、除尘器内部流场等因素。磁场作用下的非均相分离目前研究热点集中在磁力旋流器上,介绍了磁力旋流器的结构类型和特点,总结了影响分离效果的诸多因素并对旋流器内部磁性颗粒的运动状况进行了对比分析。最后对电场和磁场在非均相分离中的应用技术进行了系统的论述;对促进分离效果的措施进行了总结和归纳;并展望了该项技术未来的发展趋势和研究热点。     

磁分离技术处理炼油厂高浓度废水的研究

为了处理炼油厂污水处理场隔油池高浓度出水,通过采用磁分离技术进行净化。研究了磁分离处理效果并与污水处理场多级气浮工艺效果相比较。结果为,经磁分离工艺处理后 COD 平均去除率近60%,比现有多级气浮效果相对优异。待磁助剂回收利用后,药剂成本将与气浮药剂成本相当,但电耗较之大大降低,是污水处理场节能减排的新方向。     

纳米磁性高分子复合微球的制备及在分离工程中的应用

在总结国内外有关磁性高分子微球研究成果基础上，介绍纳米磁性高分子复合微球的制备方法，重点阐述核-壳式结构和三明治式结构纳米磁性高分子复合微球制备的最新研究进展，概述了磁性高分子复合微球在分离工程中的应用情况，并对磁性高分子微球的未来研究方向进行展望。     

Alumina-Iron Separation of High Alumina Iron Ore by Carbothermic Reduction and Magnetic Separation

The carbothermic reduction of high alumina iron ore in the absence/presence of sodium carbonate (Na₂CO₃) was carried out for alumina-iron separation by wet magnetic separation. Sodium carbonate is found to be capable of improving the separation of alumina and iron, as well as increasing the particle size of metallic iron significantly. When the high alumina ore briquettes were reduced at 1050°C for 80 min, the average particle size of metallic iron was approximately 100 μm in the presence of sodium carbonate, which is bigger than the size of 50 μm in the absence of sodium carbonate. Compared with the absence of sodium carbonate, the Al₂O₃ content of iron concentrate decreased from 4.33% to 1.29%, while the Al₂O₃ removal rate increased from 43.70% to 83.37% with the addition of 9% sodium carbonate. Experimental evidence showed that Na₂CO₃ reacted with Al₂O₃ and SiO₂ to form sodium silicate, aluminum silicate, and sodium aluminosilicate, and decreased the content of Fe in the slags, which improved the separation between the alumina and iron during the magnetic separation.     

煤焦油的净化、分离及应用浅析

阐述了国内外近年来煤焦油加工的研究状况,列举了我国煤焦油的净化技术、分离技术及其应用;并指出煤焦油的研究应注重系统化和可行性,对促进我国煤焦油加工技术的发展具有参考价值。     

Effect of the Intensification of Mechanical Processing on the Conversion of the Mineral Matter of Coal Fuel

The influence of intense preliminary mechanical processing in a disintegrator on the conversion of the mineral matter of Kuznetsk black coal was determined. With the use of X-ray spectral fluorescence analysis and a method of coal sample separation based on density, a significant redistribution of the mineral components with the use of an energy-intensive mill (disintegrator) was found in comparison with standard mills utilized in heat-power engineering in terms of both particle-size fractions and density. Crushing in the disintegrator leads to a more uniform distribution of mineral substances over the fractions. A small fraction becomes enriched in mineral elements such as calcium- and iron-containing minerals bound to the organic matter. The separation based on density showed that crushing in the disintegrator leads to a significant decrease in the concentration of iron-containing minerals and a decrease in the portion of organic components in the heavy fraction, as compared with crushing in a ball–tube mill.