高梯度分离设备

高梯度磁分离为工业提供了机密的检验方法和诊断设备。英国南安普敦大学低温研究所正在建造这个设备,同时也将对工业使用的大型超导磁分离器的设计和建造所涉及的问题进行研究。高梯度磁分离(HGMS)是过滤微米级顺磁微粒的一门技术。该过程可简述如下:铁磁性基体(如金属网或球)被放在外磁场槽中,以产生高磁场梯度井提供一个吸引、储存磁性微粒的大的表面积。需要处理的材料通常以稀浆的形式通过基体。周期地关闭磁场(或者把基体从磁场中取出),并且将磁性材料洗掉。近年来,HGMS在科学和工业中有许多应用。最广泛的应用是在材料处理方面,HGMS对于回收     

用高梯度磁分离技术控制钢铁企业颗粒物的分析

文章结合国内外现有的研究成果,首先说明钢铁企业颗粒物的磁特性,其次阐述高梯度磁分离技术的基本原理,分析梯度磁场分离效果的影响因素,最后说明了高梯度磁分离技术用于钢铁企业颗粒物,尤其是对于PM10和PM2.5控制的可行性,存在问题以及发展前景。     

高梯度磁分离技术用于工业烟气除尘的研究

随着工业的发展，粒子污染物的排放标准越来越严格。研制高效、经济的除尘装置迫在眉睫。高梯度磁分离技术在除尘方面具有很好的应用前景。本文阐述了高梯度磁分离技术去除磁性粒子的基本原理、实验研究、影响除尘效率的因素、理论模型的研究以及经济性方面与现在所用除尘装置的比较，并指出了高梯度磁分离除尘还存在的问题。     

用高梯度磁分离技术对花垣锰矿石富锰降磷的初步研究

本文叙述了1981～1984年,我们采用高梯度磁分离法对花垣碳酸锰矿石富锰降磷的试验研究情况。试验表明,高梯度磁分离法对处理微细料弱磁性矿物是有效的,对花垣锰矿的降磷尚有一些问题期待深入研究。作者对这些问题作了分析讨论,提出了初步看法。     

转炉钢厂除尘废水的磁场净化法

转炉钢厂除尘废水常用净化法（宙降法或絮凝沉降法）效率低下，复合絮凝一磁分离法顾及到废水中固体悬浮物（简写为ＳＳ）的粒度和磁性特点，促进了ＳＳ的凝聚性，强化了固液分离过程，主要研究了磁场净化规律，沉降分离与磁分离过程的净化模型。     

高梯度磁分离铬盐浸出浆液中的铬渣

提出了将铬渣从铬盐浸出浆液中去除的高梯度磁分离方法，建立了高梯度磁分说 的分离能力与设备参数，操作参数和物料性质参数之间关系的理论模型，定量讨论了磁场强度和操作温度对有效分离时间的的影响。     

磁场效应强化湿法冶金的现状及前景

新型磁性材料的开发和磁场相关理论的研究发展为磁处理的高效应用奠定了坚实的理论基础,拓宽了磁处理的利用空间,尤其是磁场在动力学方面的相关研究极大地推动了其在湿法冶金中的应用。磁场能够控制化学反应、改变分子结构、提高渗透性等作用,具有投资小、操作方便、无污染等优势,加之离子本身磁性的差异和运动的带电离子在磁场中受到洛伦兹力和磁场梯度力的特性,因此,磁场可以突破限制湿法冶金的浸出、净化和水溶液电解过程的瓶颈。本文就磁处理强化湿法冶金领城的扩散、萃取、离子分离、电化学以及蒸发浓缩等方面的研究现状及前景进行了综述与分析,并展望了磁处理在湿法冶金中的应用前景。     

钢丝网聚磁介质在处理钢铁废水中的应用

在应用高梯度磁分离技术处理钢铁生产废水时,磁过滤器滤罐中充填的磁介质的材质和结构,影响着废水中杂质的净化效率,是决定净化处理技术经济指标的重要因素之一,目前在国内钢铁废水处理采用高梯度磁分离技术所应用的聚磁介质,多为钢毛,由     

磁性活性炭的制备及去除河涌水中COD的研究

采用改性磁种——磁性活性炭复合吸附材料结合磁分离法处理河涌水,考察了絮凝剂种类及用量、改性磁种投加量、作用时间、磁场强度等对河涌水中COD的去除效果。结果表明,采用改性磁种——磁性活性炭吸附并结合高梯度磁分离处理河涌水COD效果明显,在聚合氯化铝(PAC)用量10g/L、改性磁种用量30g/L、改性磁种作用时间20min、分离磁场强度8 000kA/m的条件下,原水含COD 90.18mg/L,出水含COD可降至6.59mg/L,除COD率达92.69%,达到《地表水环境质量标准》(GB 3838—2002)中的Ⅰ类水COD标准。     

磁分离设备研究的新进展

1985年6月在法国戛纳召开的第十五届国际选矿会议上,宣读和交流磁选论文十一篇,包括弱磁场磁选一篇,高梯度磁选七篇,超导磁选三篇。现仅就磁分离设备论文的有关论述和信息加以综述介绍。 一、弱磁场磁选机——圆筒-平板干式磁选机 波兰M.BROZEK等从降低强磁性矿物在磁选过程中的磁絮凝作用,提高磁性产品的质量出发,在现有的交变磁场的平板磁选机和鼓型磁选机的基础上,通过对平板与圆筒之间空隙中的磁场和磁力的分析,设计     

高梯度磁选技术的分选特点及其应用领域

从高梯度磁选技术的分选特点出发,着重总结了高梯度磁选技术的主要应用领域及发展情况。大量研究应用实例表明,高梯度磁选技术在金属矿、部分非金属矿的分选及工业废水处理等诸多领域具有极其广阔的应用前景。最后提出了高梯度磁选技术的发展方向。     

YHXTG-4012强磁选机的研制及工业生产实践

YHXTG-4012型永磁干式强磁选机是一种磁极作业面宽、具有高磁场和高梯度的新型磁系结构的磁选机系列。对该磁极单元和磁系结构做了较详细的介绍,分析了该新型永磁强磁选机磁系结构在选别粗粒级弱磁性矿物上的优势,列举了试验样机投入生产后的选矿技术经济指标。     

Localization of rare earth ions in an inhomogeneous magnetic field toward their magnetic separation

Efficient extraction and recycling methods are an important issue for rare earth elements (REE). The significant differences in their magnetic moments make magnetic separation a promising step. Although the magnetic field gradient manipulation of ions seemed to be impossible, the robust enrichment of some paramagnetic RE ions was found in the vicinity of the magnet. The studies in recent years resolved the physical paradox of why, despite the Brownian motion of the ions, there is a reproducible enrichment of RE ions in magnetic field gradients. The existence of trigger process and energy barrier was proved. However, these studies usually used only high paramagnetic ions, e.g., Dy(III) or Ho(III). This work verifies the theory of the possible magnetic separation for 8 different rare earth ions, respectively. For this purpose, concentration distribution in rare earth chloride solutions were measured using a Mach-Zehnder interferometer. The magnetic field was assured by a Halbach configuration to enhance the effect. The results show the classification of RE solutions into 2 classes: Class I contains the REs with low magnetic moment, whereas Class II includes the REs of high magnetic moment. Only the latter group shows the enrichment of ions in the vicinity of the magnet which encourages the implementation of magnetic separation into existing hydrometallurgical technology to enhance the selectivity of REE.     

从某钨矿选厂钨细泥中回收钨、锡的试验研究

采用白钨的常温浮选分离技术,优化合理的组合药剂制度,对某钨矿的钨细泥进行高梯度磁选、浮选、摇床重选、离心机选别的对比试验,采用"摇床—浮选—摇床"、摇床—浮选—电选"、离心机—浮选—离心机"联合流程等方案分选白钨锡石,确定"高梯度磁选—离心机"选别黑钨矿"、离心机—浮选—离心机"联合流程分选白钨和锡石的适宜工艺,经全流程闭路试验,可获得钨精矿品位41.67%、回收率55.36%,锡精矿品位42.23%、回收率48.95%,试验达到了良好的指标。     

Development of a Fluidized Dry Magnetic Separator and Its Separation Performance Tests

ABSTRACT

In order to efficiently purify and recover the magnetite powder (dense medium) in the process of dry coal preparation of air-dense medium fluidized beds, a new type of fluidized dry magnetic separator was developed in this paper by changing the feeding device and mode, the location and structure of the separating tank, and the particles’ movement direction in the separating tank on the basis of the traditional permanent drum dry low-intensity magnetic separator. The magnetic pole arrangement, magnetic field intensity, magnetic field gradient, and action depth of magnetic field of the magnetic system were studied to determine the reasonable parameters of magnetic system for magnetic separation tests. The results of magnetic separation tests for the mixture of magnetite powder and coal powder show that the fluidized dry magnetic separator can improve the grade of magnetite powder as much as possible on the basis of ensuring the recovery of magnetite powder, and obtain the high efficiency purification and recovery of magnetite powder.     

Magnetic fluid separation of gold-containing products in the vibration field

New data on the process of the magnetic fluid (MF) separation, which is based on the ponderomotive effect of the magnetized separation medium—or ferromagnetic fluid (FMF) on the nonmagnetic bodies arranged in it—are obtained. The magnetization of the FMF in a nonuniform magnetic field increases the strength of the field of mass forces affecting the FMF and, as a consequence, the pressure gradient in the FMF. This phenomenon can be considered pseudoweighting of the FMF and, when controlling the magnetic field force, it can be used to separate nonmagnetic materials according to their specific weights. The behavior of the FMF in the vibration field is investigated theoretically, and the dependence of energy absorbed by it on the amplitude and frequency of vibrations is revealed. Under industrial conditions, a series of tests on separation of free gold from the products of washing the goldfields by the method of MF separation is performed. The results of these tests prove the prospects of including secondary Au-containing resources with difficult-to-recover gold in processing.     

Valuable Metals Recovery from Tailings of Patched Copper—Nickel Ores

Norilsk copper-nickel ores sulphide contain up to half its composition pyrrhotite of different magnetic values. Ferroplatinum features detectable magnetization also. On this basis, research on Norilsk products recovery by magnetic methods is beyond question.

With Norilsk patched ores tailings containing 0.14-0.17% nickel and 0.05-0.007 mm gain size, the magnetic product was produced by using usual separation in 1-3 kOe field with the following indices: outcrop 3-6%. nickel contents 0.67-0.89% and recovery 15-25%. High gradient magnetic separation (HGMS) in the field of I kOe gives outcrop 8.3% (ordinary 3%), nickel contents 0.35%, recovery 19.4%; in field of 2 kOe when equal nickel contents 0.4% outcrop—14.5%—three times as high as ordinary (4.2%) and accordingly recovery is larger, HGMS is able to raise an outcrop and nickel recovery out of the tailings by a factor of two or more but the quality is lost.

HGMS, in comparison with the usual one improves the separation indices by a factor of two on noble metals. The biggest sum is 8.11 g/t (“initial” content is 1.5 g/t), outcrop 18.7% and recovery 75.8%.

The magnetic fraction of the first separation contains approximately an equal quantity of pyrrhotite and magnetite. In the combined magnetic field (constant and variable) this product was partitioned into magnetic fraction mainly magnetite, and “non-magnetic” mainly pyrrhotite. There is 1.25% nickel in “non-magnetic” fraction, its outcrop 4% from the original mass of tailings.

The concentrate with nickel contents 1.25% and outcrop to 4% is separated out the tailings of patched ores by two-staged separation.     

直线圈组在矿物分离中的应用

在分析常规磁选设备由于磁团聚作用而得不到高品位磁铁矿精矿的基础上，研制了一种用直线圈组励磁，产生顺序下移磁场的高效磁重选矿设备——磁选柱。介绍了磁选柱的磁场特性、分离原理及其应用效果。