Red Mud Minimization by Iron Removal

通过除铁最大限度地减少赤泥

基本信息

项目摘要

9714594 Schlesinger The objective of this research is to demonstrate the use of partial reduction as a means of removing the iron from "red mud", produced in the purification of aluminum using the Bayer process. Red mud contains high ferric-oxide, resulting in its name, as well as significant percentages of alumina, soda, silica, lime and titania, and might prove a valuable source of these materials. Currently red mud is disposed of at sea or in shallow lagoons along ocean shores or river banks. Because of the less-hazardous nature of red mud, little research attention has been given to reducing the volume of disposed material or the recovery of its constituents. Several characteristics of red mud make the development of an economically viable treatment process difficult, e.g. the moisture content, the extremely fine particle size and the refractory nature of most of its constituents. One of the most challenging aspects lies in finding a way of separating the iron it contains (in the form of hematite). Several techniques have been attempted, but they have been unsuccessful because of their high energy requirements and because they produce a slag which is difficult to process further. This research is aimed at reducing the hematite to magetite or wustite, which are ferromagnetic and can be recovered by low-gradient magnetic separation processes. This would require lower furnace temperatures, reducing energy costs and minimizing interaction among the other constituents in the mud. The research program will focus on bench-scale reduction experiments varying the type of mud, reduction temperature and the choice and amount of reducing agent; quantitative process mineralogy techniques will be used to assess the degree of reduction achieved and to generate a characterization profile of U.S. red muds. A second focus involves demonstrating the use of low-gradient magnetic separation in recovering iron from the partially reduced materials. Recent advances in magnetic separation have shown promise in iron recovery from other fine-grained process wastes and their integration into a red mud treatment process will help create a viable alternative to present disposal and recovery techniques. ***
9714594 Schlesinger 这项研究的目的是证明使用部分还原作为从“赤泥”中去除铁的一种方法,“赤泥”是使用拜耳法纯化铝时产生的。 赤泥含有高含量的氧化铁(因此得名),还含有大量的氧化铝、苏打、二氧化硅、石灰和二氧化钛,可能是这些材料的宝贵来源。 目前,赤泥被弃置在海上或沿着海岸或河岸的浅泻湖中。 由于赤泥的危险性较小,因此很少有研究关注减少废弃材料的体积或其成分的回收。赤泥的几个特性使得开发经济可行的处理工艺变得困难,例如水分含量、极细的颗粒尺寸以及大部分成分的耐火特性。 最具挑战性的方面之一在于找到一种分离其所含铁(以赤铁矿形式)的方法。 已经尝试了几种技术,但由于其高能量需求并且因为它们产生难以进一步加工的炉渣,所以它们没有成功。 这项研究的目的是将赤铁矿还原为铁磁体或方铁矿,它们具有铁磁性,可以通过低梯度磁选工艺回收。 这需要较低的炉温,从而降低能源成本并最大限度地减少泥浆中其他成分之间的相互作用。 该研究计划将侧重于改变泥浆类型、还原温度以及还原剂的选择和用量的小规模还原实验;定量过程矿物学技术将用于评估所实现的减少程度并生成美国赤泥的表征概况。 第二个重点涉及演示使用低梯度磁力分离从部分还原的材料中回收铁。 磁分离的最新进展已显示出从其他细粒工艺废物中回收铁的前景,并将其集成到赤泥处理工艺中将有助于创造一种可行的替代方案来替代现有的处置和回收技术。 ***

项目成果

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Mark Schlesinger其他文献

No exit? The effect of health status on dissatisfaction and disenrollment from health plans.
没有出口?
  • DOI:
  • 发表时间:
    1999
  • 期刊:
  • 影响因子:
    3.4
  • 作者:
    Mark Schlesinger;Benjamin Druss;T. Thomas
  • 通讯作者:
    T. Thomas
Paying the price: medical care, minorities, and the newly competitive health care system.
付出的代价是:医疗保健、少数族裔和新竞争的医疗保健系统。
  • DOI:
    10.2307/3349992
  • 发表时间:
    1987
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Mark Schlesinger
  • 通讯作者:
    Mark Schlesinger
Countervailing agency: a strategy of principaled regulation under managed competition.
反补贴机构:有管理竞争下的主体监管策略。
  • DOI:
  • 发表时间:
    1997
  • 期刊:
  • 影响因子:
    6.6
  • 作者:
    Mark Schlesinger
  • 通讯作者:
    Mark Schlesinger
Medical professionalism under managed care: the pros and cons of utilization review.
管理式医疗下的医疗专业精神:利用审查的利弊。
  • DOI:
  • 发表时间:
    1997
  • 期刊:
  • 影响因子:
    9.7
  • 作者:
    Mark Schlesinger;Bradford H. Gray;Krista M. Perreira
  • 通讯作者:
    Krista M. Perreira
Extraction & Processing Division: Activities and Updates
  • DOI:
    10.1007/s11837-012-0326-0
  • 发表时间:
    2012-05-09
  • 期刊:
  • 影响因子:
    2.300
  • 作者:
    Adrian Deneys;Mark Schlesinger;Tom Battle;Boyd Davis;Mike Free
  • 通讯作者:
    Mike Free

Mark Schlesinger的其他文献

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{{ truncateString('Mark Schlesinger', 18)}}的其他基金

Doctoral Dissertation in DRMS: Choice Sets and Consumer Selection of Health Plans
DRMS 博士论文:健​​康计划的选择集和消费者选择
  • 批准号:
    0615538
  • 财政年份:
    2006
  • 资助金额:
    $ 25.97万
  • 项目类别:
    Standard Grant
Inter-American Materials Collaboration (CIAM): Stability, Durability and Crystallization of Iron Phosphate Glasses
美洲材料合作组织 (CIAM):磷酸铁玻璃的稳定性、耐用性和结晶
  • 批准号:
    0502463
  • 财政年份:
    2005
  • 资助金额:
    $ 25.97万
  • 项目类别:
    Continuing Grant
High-Temperature Differential Scanning Calorimetry
高温差示扫描量热法
  • 批准号:
    0404605
  • 财政年份:
    2004
  • 资助金额:
    $ 25.97万
  • 项目类别:
    Continuing Grant
Tellurium Thermodynamics in Ferrous Alloys
铁合金中的碲热力学
  • 批准号:
    0096619
  • 财政年份:
    2001
  • 资助金额:
    $ 25.97万
  • 项目类别:
    Continuing Grant
Environmentally Conscious Manufacturing: Slag and Matte Interactions with Chrome-Free Refractories for Copper Production
环保制造:铜生产中炉渣和冰铜与无铬耐火材料的相互作用
  • 批准号:
    9528815
  • 财政年份:
    1996
  • 资助金额:
    $ 25.97万
  • 项目类别:
    Standard Grant
Thermodynamics of Iron-Carbon-Lead and Iron-Carbon-Bismuth Solutions
铁碳铅和铁碳铋溶液的热力学
  • 批准号:
    9419560
  • 财政年份:
    1995
  • 资助金额:
    $ 25.97万
  • 项目类别:
    Continuing Grant

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