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5. Reaction between magnesiowustite of lower mantle composition and core-forming Fe-Ni alloy at 1-40 GPa

Author

Kesson, S., Ringwood, A.E., Hibberson, W., Gerald, J. Fitz, and Ware, N.

Subjects
Earth -- Mantle, Minerals -- Research, Earth sciences
Abstract

One class of models for the early history of the Earth requires the present-day inventory of siderophile elements in the mantle to have been established by equilibrium partitioning between core-forming metal and mantle minerals at high pressures and temperatures deep inside the Earth. We have accordingly carried out reconnaissance experiments on the partitioning of nickel between model lower mantle magnesiowustite (Mg[prime] = 85 and 1.3 wt% NiO) and a model core-forming alloy, [Fe.sub.94][Ni.sub.6] ([approximately]7 wt% Ni) at pressures between 1-40 GPa and temperatures ranging from 1200 [degrees] C to >2000 [degrees] C. Reversal experiments were also attempted. Our results highlight the difficulty of attaining equilibrium partitioning in this system and imply that partition coefficients derived from unreversed experiments should accordingly be viewed with reservation. Our data nevertheless imply that the concentration of NiO in lower mantle magnesiowustite in equilibrium with core-forming metal with [approximately] 7 wt% Ni would be extremely low, e.g., about 0.2 wt% NiO. Moreover, equilibrium seems to be fairly insensitive to the effects of either pressure or temperature, and so it is unlikely that magnesiowustite could acquire 1.3 wt% NiO simply by equilibrating with core-forming metal under special high P-T conditions early in Earth history. Alternative hypotheses for the present-day siderophile element inventory of the mantle are accordingly preferred.

Published
1997

9. Geometallurgical characterisation of Australian iron ores: from ore to processed product.

Author

Suthers S., Geomet 2016: Proceedings of the third AusIMM International geometallurgy conference Perth, Australia 15-Jun-1616-Jun-16, Donskoi E., Manuel J., Poliakov A., Pownceby M.I., Ware N., Suthers S., Geomet 2016: Proceedings of the third AusIMM International geometallurgy conference Perth, Australia 15-Jun-1616-Jun-16, Donskoi E., Manuel J., Poliakov A., Pownceby M.I., and Ware N.

Abstract

CSIRO has developed a geometallurgical approach to iron ore processing. This can predict the behaviour of sinter and pellet blends using a model that incorporates the chemical, mineralogical and textural properties of the ore with process operating parameters. The ore group classification scheme applies mainly to banded iron formation ores, but can be adapted to the more uniform, reworked textures found in channel iron deposits and terrestrial detrital iron deposits. The classification scheme defines texture groups for haematites, haematite-goethites and goethites in terms of dominant and minor minerals, association, porosity, density, hardness, and features such as grain size and shape, fracture, and colour. The texture groups are then ranked by relative physical hardness. The textural and metallurgical properties of the ore groups were established by testing samples from hand specimen to lump ore size. Discussion is presented of automated textural characterisation schemes for ores and their processed products, including automated optical image analysis and automated electron microbeam techniques. If future work to predict sinter properties from ore types is successful, it is hoped that it will be possible to simulate different production scenarios from the mine through to the sinter plant., CSIRO has developed a geometallurgical approach to iron ore processing. This can predict the behaviour of sinter and pellet blends using a model that incorporates the chemical, mineralogical and textural properties of the ore with process operating parameters. The ore group classification scheme applies mainly to banded iron formation ores, but can be adapted to the more uniform, reworked textures found in channel iron deposits and terrestrial detrital iron deposits. The classification scheme defines texture groups for haematites, haematite-goethites and goethites in terms of dominant and minor minerals, association, porosity, density, hardness, and features such as grain size and shape, fracture, and colour. The texture groups are then ranked by relative physical hardness. The textural and metallurgical properties of the ore groups were established by testing samples from hand specimen to lump ore size. Discussion is presented of automated textural characterisation schemes for ores and their processed products, including automated optical image analysis and automated electron microbeam techniques. If future work to predict sinter properties from ore types is successful, it is hoped that it will be possible to simulate different production scenarios from the mine through to the sinter plant.

Published
2016

16. Melting behaviour of haematite and goethite fine ores and its potential impact on sinter quality.

Author

Ware N., Iron ore conference Perth, Western Australia 12-Aug-1314-Aug-13, Lu L., Manuel J.R., Raynlyn T., Ware N., Iron ore conference Perth, Western Australia 12-Aug-1314-Aug-13, Lu L., Manuel J.R., and Raynlyn T.

Abstract

The fundamental melting properties of haematitic, haematite-goethite and goethitic fine ores have been evaluated using the method described in Clout and Manuel (2003). At the lower temperatures required for sintering haematitic ores, silico-ferrite of calcium and aluminium (SFCA), derived from the reaction between the fine (nominally -1 mm) fraction of the ore and fluxes, is the primary bonding phase formed in the sinter matrix. Understandably, the nature of the reactions that occur in the reactive matrix during heating and cooling have a primary influence on the properties of the resulting sinter product. The aim of the laboratory-scale melting test is to evaluate the development of sinter matrix strength during melting of the fluxed, fine reactive component of the ore. This test simulates the initial melt formation that occurs in the granule-adhering fines layer during the sintering process, resulting in inter-granule bonding. The strength of these bonds has a critical influence on the overall strength of the sinter. Fluxed ore blends smaller than 1 mm are compressed into tablets and fired using a standard heating profile, in a controlled, low oxygen-potential atmosphere. The matrix strength is expressed as a laboratory-scale tumble index, which correlates with the industry standard pot-grate tumble test. Three mineralogically and texturally distinct ores were compared., The fundamental melting properties of haematitic, haematite-goethite and goethitic fine ores have been evaluated using the method described in Clout and Manuel (2003). At the lower temperatures required for sintering haematitic ores, silico-ferrite of calcium and aluminium (SFCA), derived from the reaction between the fine (nominally -1 mm) fraction of the ore and fluxes, is the primary bonding phase formed in the sinter matrix. Understandably, the nature of the reactions that occur in the reactive matrix during heating and cooling have a primary influence on the properties of the resulting sinter product. The aim of the laboratory-scale melting test is to evaluate the development of sinter matrix strength during melting of the fluxed, fine reactive component of the ore. This test simulates the initial melt formation that occurs in the granule-adhering fines layer during the sintering process, resulting in inter-granule bonding. The strength of these bonds has a critical influence on the overall strength of the sinter. Fluxed ore blends smaller than 1 mm are compressed into tablets and fired using a standard heating profile, in a controlled, low oxygen-potential atmosphere. The matrix strength is expressed as a laboratory-scale tumble index, which correlates with the industry standard pot-grate tumble test. Three mineralogically and texturally distinct ores were compared.

Published
2013

17. When Women Deliver at Home Without a Skilled Birth Attendant: A Qualitative Study on the Role of Health Care Systems in the Increasing Home Births Among Rural Women in Southwestern Uganda

Author

Atukunda EC, Mugyenyi GR, Obua C, Musiimenta A, Najjuma JN, Agaba E, Ware NC, and Matthews LT

Subjects
childbirth, home delivery, facility delivery, health systems, barriers to care, Gynecology and obstetrics, RG1-991
Abstract

Esther C Atukunda,1 Godfrey R Mugyenyi,1 Celestino Obua,1 Angella Musiimenta,2 Josephine N Najjuma,1 Edgar Agaba,1 Norma C Ware,3 Lynn T Matthews4,5 1Faculty of Medicine, Mbarara University of Science and Technology, Mbarara, Uganda; 2Faculty of Computing and Informatics, Mbarara University of Science and Technology, Mbarara, Uganda; 3Global Health and Social Medicine, Harvard Medical School, Boston, MA, USA; 4Division of Infectious Diseases and Center for Global Health, Massachusetts General Hospital, Boston, MA, USA; 5Division of Infectious Disease, University of Alabama at Birmingham, Birmingham, AL, USACorrespondence: Esther C Atukunda Email estheratukunda@gmail.comBackground: Uganda’s maternal mortality remains unacceptably high, with thousands of women and newborns still dying of preventable deaths from pregnancy and childbirth-related complications. Globally, Antenatal care (ANC) attendance has been associated with improved rates of skilled births. However, despite the fact that over 95% of women in Uganda attend at least one ANC, over 30% of women still deliver at home alone, or in the presence of an unskilled birth attendant, with many choosing to come to hospital after experiencing a complication. We explored barriers to women’s decisions to deliver in a health care facility among postpartum women in rural southwestern Uganda, to ultimately inform interventions aimed at improving skilled facility births.Methods: Between December 2018 and March 2019, we conducted in-depth qualitative face-to-face interviews with 30 post-partum women in rural southwestern Uganda. The purposeful sample was intended to represent women with differing experiences of pregnancy, delivery, and antenatal care. We included 15 adult women who had delivered from their homes and 15 who had delivered from a health facility in the previous 3 months. Women were recruited from 10 villages within 20 km of a regional referral hospital. Interviews were conducted and digitally recorded in a private setting by a trained native speaker to elicit experiences of pregnancy and birth. Translated transcripts were generated and coded. Coded data were iteratively reviewed and sorted to derive descriptive categories using an inductive content analytic approach.Results: Regardless of where they decided to give birth, women wished to deliver in a supportive, respectful, responsive and loving environment. The data revealed six key barriers to women’s decisions to deliver from a health care facility: 1) Fear of unresponsive care, fueling a fear of being neglected or abandoned while at the facility; 2) fear of embarrassment and mistreatment by health care providers; 3) low perception of risk associated with pregnancy and childbirth; 4) preferences for particular birthing positions and their outcome expectations; 5) perceived lack of privacy in public facilities; and 6) perceived poor clinical and interpersonal skills of health providers to adequately explain birthing procedures or support expectant or laboring women and their newborn.Conclusion: Anticipation of unsupportive, unresponsive, disrespectful treatment, and a perceived lack of tolerance for simple, non-harmful traditions prevent women from delivering at health facilities. Building better interpersonal relationships between patients and providers within health systems could reinforce trust, improve patient–provider interaction, and facilitate useful information transfer during ANC and delivery visits. These expectations are important considerations in developing supportive health care systems that provide acceptable patient-friendly care. These findings are indicative of the vital need for midwives and other health care providers to have additional training in the role of communication and dignity in delivery of quality health care.Keywords: childbirth, home delivery, facility delivery, health systems, barriers to care, Uganda

Published
2020

18. Characteristics and sintering performance of iron ore sinter fines.

Author

Lu L., Iron ore conference 2009 Perth, Western Australia 27-Jul-0929-Jul-09, Adam M., Edenton A., Holmes R.J., Manuel J.R., Raynlyn T., Smyth R., Ware N., Lu L., Iron ore conference 2009 Perth, Western Australia 27-Jul-0929-Jul-09, Adam M., Edenton A., Holmes R.J., Manuel J.R., Raynlyn T., Smyth R., and Ware N.

Abstract

Granulation efficiency, nucleus stability and the volume and properties of the primary sinter melt have important effects on sintering productivity and sinter quality under fixed sintering conditions. Iron ore fines consist mainly of iron oxides with different amounts of gangue minerals and loss on ignition (LOI) components. Depending on their distribution within the ore and/or green bed, certain gangue phases such as Al2O3 and SiO2 in the coarse nucleus particles affect nucleus stability, but may remain segregated from the matrix. The same phases in the adhering fines fractions readily enter the initial sinter melt, formed mainly from fine Fe2O3 and CaO particles, and affect its properties. Release of the LOI components generates secondary porosity which, together with primary ore porosity, affects the reactivity of nucleus particles and distribution of retained porosity in the sinter matrix. Generation of significant gas volume and secondary porosity within a high-viscosity melt can result in obstruction of air flow rate through the bed. As release of LOI components is endothermic, iron ore fines of higher LOI content often require more fuel to maintain the same flame temperature. The particle shape, size distribution and porosity of the fines play an important role in determining their granulating characteristics. Ore mineralogy and textural relationships determine the primary porosity, which directly affects the amount of water required for efficient granulation. Ore mineralogy related to deposit characteristics also determines the proportions of ore textures present, with the proportion of hydrated oxides directly related to the LOI components. There is a close link between ore mineralogy and the LOI components. For a fixed processing flow sheet, ore mineralogy also affects the shape and size distribution of the fines., Granulation efficiency, nucleus stability and the volume and properties of the primary sinter melt have important effects on sintering productivity and sinter quality under fixed sintering conditions. Iron ore fines consist mainly of iron oxides with different amounts of gangue minerals and loss on ignition (LOI) components. Depending on their distribution within the ore and/or green bed, certain gangue phases such as Al2O3 and SiO2 in the coarse nucleus particles affect nucleus stability, but may remain segregated from the matrix. The same phases in the adhering fines fractions readily enter the initial sinter melt, formed mainly from fine Fe2O3 and CaO particles, and affect its properties. Release of the LOI components generates secondary porosity which, together with primary ore porosity, affects the reactivity of nucleus particles and distribution of retained porosity in the sinter matrix. Generation of significant gas volume and secondary porosity within a high-viscosity melt can result in obstruction of air flow rate through the bed. As release of LOI components is endothermic, iron ore fines of higher LOI content often require more fuel to maintain the same flame temperature. The particle shape, size distribution and porosity of the fines play an important role in determining their granulating characteristics. Ore mineralogy and textural relationships determine the primary porosity, which directly affects the amount of water required for efficient granulation. Ore mineralogy related to deposit characteristics also determines the proportions of ore textures present, with the proportion of hydrated oxides directly related to the LOI components. There is a close link between ore mineralogy and the LOI components. For a fixed processing flow sheet, ore mineralogy also affects the shape and size distribution of the fines.

Published
2009

24. Correspondence.

Author

Carr, Clarence, Beardsley, Lillian R., Erb, Louis, Ware, N. J., Thomas, E. H., O'Shaughnessy, Edith, and Hunter, Walter C.

Subjects
LETTERS to the editor, VETO, FARMERS, COMMERCIAL law
Abstract

Presents letters to the editor referencing editorial related to the President's veto of the Daylight Saving Law, published in "The Nation." Readjustment in the day's schedule of business; financial loss of the farmers; advocacy for the repeal of the law.

Published
1919

25. CONNECT--Spanish Version

Author

Chavez, L. M., primary, Canino, G., additional, Shrout, P. E., additional, Barrio, C., additional, and Ware, N. C., additional

Published
2007
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26. Apollo 14 mineral ages and the thermal history of the Fra Mauro formation.

Author

Compston, W, Vernon, M. J, Berry, H, Rudowski, R, Gray, C. M, Ware, N, Chappell, B. W, and Kaye, M

Subjects
Space Sciences
Abstract

The thermal inertia of the Fra Mauro formation limits its rate of cooling. The calculations of Jaeger (1961) for the cooling of an extrusive sheet are used to estimate the time required for a central temperature drop of 10%. This time is found to be about 45 years. For a 90% temperature drop, the time is about 200 years. Analytical methods used in the investigations are discussed together with the diffusion of Rb and Sr within lunar basalt. Isochron diagrams for various minerals are presented.

Published
1972

28. Petrology of the lunar rocks from Apollo 11 landing site

Author

Essene, E. J, Ringwood, A. E, and Ware, N. G

Subjects
Space Sciences
Abstract

Petrologic analyses of minerals and glass spherules in Apollo 11 lunar rocks, indicating little fractionation and shallow-level differentiation

Published
1970

36. Case managers speak out: responding to depression in community long-term care.

Author

Munson M, Proctor E, Morrow-Howell N, Fedoravicius N, Ware N, Munson, Michelle, Proctor, Enola, Morrow-Howell, Nancy, Fedoravicius, Nicole, and Ware, Norma

Abstract

Objective: This study sought to understand how case managers in one publicly funded health and social service system, community long-term care, understand and address depression among their clients.Methods: Four focus groups with a total of 18 case managers were conducted. Case managers were asked a series of questions about their perspectives on the recognition and treatment of depression, including subthreshold depression, in community long-term care.Results: Case managers perceived addressing depression as complex because of competing demands. Furthermore, case managers perceived conflict between their current role and what it would take to expand their role to include addressing depression.Conclusions: Case managers suggested that in order to successfully improve the detection and treatment of depression in community long-term care, systemic changes, such as increased support and training, may be necessary, along with a shift in the professional role of case managers. [ABSTRACT FROM AUTHOR]

Published
2007
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37. Associations between adherence to guidelines for antipsychotic dose and health status, side effects, and patient care experiences.

Author

Dickey B, Normand ST, Eisen S, Hermann R, Cleary P, Cortés D, and Ware N

Abstract

BACKGROUND: One approach to improving quality of care is to encourage physicians to follow evidence-based practice guidelines. Examples of evidence-based guidelines are the PORT recommendations for the treatment of schizophrenia. However, few studies have examined the relationship between adherence to guidelines and patient outcomes in clinical settings. OBJECTIVE: The purpose of this article is to report the relationship between guideline adherence to antipsychotic medication dose and self-reported health status, side effects, and perceptions of care. RESEARCH DESIGN: This report is based on a subsample of patients from a larger prospective observational study of disabled Massachusetts Medicaid beneficiaries treated for schizophrenia. SUBJECTS: Participants were 329 acutely ill, vulnerable, high-risk Medicaid adult beneficiaries enrolled after visiting any 1 of 8 psychiatric emergency screening teams for hospital admission evaluation. MEASURES: Dose levels, symptoms, and functioning from medical records; self-reports as data collected from BASIS-32, SF-12, and CABHS; and paid health benefit claims for psychiatric treatment were measured. RESULTS: Approximately 40% of the patients in this study had daily antipsychotic doses well above the recommended range, but there was no evidence that their health status was better than those on doses below 1000 CPZ units recommended for acute episodes. High-dose levels had no relationship to baseline symptom profile or referral source. CONCLUSIONS: There was no evidence that health status was better on higher-than-recommended doses, but we cannot conclude that lower doses for some would have led to poorer outcomes. Physicians who believe that higher doses are more therapeutic for patients need to demand rigorous effectiveness research that tests whether there are benefits of higher doses and determine the ratio of those benefits to the clinical costs, including the risk of side effects. [ABSTRACT FROM AUTHOR]

Published
2006
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39. Toward a model of social course in chronic illness: the example of chronic fatigue syndrome.

Author

Ware, Norma C. and Ware, N C

Subjects
*CHRONIC fatigue syndrome, *CHRONIC diseases, *SOCIAL distance, *MANNERS & customs, *CONDUCT of life
Abstract

Retrospective, narrative accounts of illness experience in chronic fatigue syndrome provide the empirical basis for a preliminary conceptual model of social course in chronic illness. Qualities of distress interact with culturally specific expectations for social life and personal conduct to trigger microsocial processes of marginalization: role constriction, delegitimation, impoverishment, and social isolation. Marginalizing processes are opposed by acts of resistance initiated by ill individuals and directed toward integration in social worlds. Social distance from the perceived centers of CFS sufferers' interpersonal worlds expands and contracts with the changing predominance of marginalizing and resisting influences over time. Social course thus consists of successive, bi-directional movements along a 'continuum of marginality' by persons living lives with chronic illness. [ABSTRACT FROM AUTHOR]

Published
1999
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40. Sociosomatics and illness in chronic fatigue syndrome.

Author

Ware, N C

Abstract

Objective: This study examines social processes that construct the course of chronic illness. Specifically, it identifies and describes mechanisms that constitute the process of role constriction in employment for individuals with chronic illness.Method: Sixty-six persons meeting the Centers for Disease Control case definition of chronic fatigue syndrome (CFS) participated in a longitudinal study involving three waves of data collection over 3 years. Qualitative and quantitative methods were combined in the research, which included face-to-face semistructured interviews, telephone interviews, and self-report questionnaires. Materials presented in this study are drawn principally from the Year 1 face-to-face and telephone interviews.Results: When patterns of symptoms and of the illness course in CFS intersect with work requirements, they impede performance and place ill individuals at risk for job loss. Persons with CFS devise and implement specific strategies to resist role constriction and remain in the work force.Conclusions: Role constriction is a social process of marginalization in chronic illness. Opposing forces of marginalization and resistance define the social course in chronic illness and suggest that chronicity can be thought of as a marginalized position in social space. [ABSTRACT FROM AUTHOR]

Published
1998
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44. Some chemical data on members of the shoshonite association

Author

Joplin, Germaine A., Kiss, E., Ware, N. G., and Widdowson, Jennifer R.

Abstract

SummaryA number of minerals and residual glasses from absarokites, shoshonites, and latites have been analysed by electron probe.Clinopyroxenes show very little iron-enrichment and these rocks are thus distinguished from tholeiites and alkali basalts.Glasses from this group are also distinct from tholeiites and alkali basalts and occupy a separate field on a CaO-Na2O-K2O diagram.

Published
1972
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46. Correspondence.

Author

Pinkham, Henry W., Ware, N. J., Kirchwey, George W., Fitch, Edward, and Edgerton, Charles E.

Subjects
LETTERS to the editor, PEACE, DEBT, POLITICS & war
Abstract

Presents letters to the editor, published in the February 27, 1924 issue of the periodical "The Nation." Information on the U.S. peace programs; Reference to a letter on war debts.

Published
1924

47. The Creative Ideal.

Author

Ware, N. J.

Subjects
CREATIVE ability, CREATIVE thinking, CLOTHING & dress, WOOL textiles, WEALTH
Abstract

Until 1800 or thereabouts in the U.S. men regarded wealth as a by-product of some creative service. The way to wealth was the perfection of that service. There was such a thing as professional honor in the crafts and trades, the creators had control, unprofessional conduct was the exception. A silk dress was made of silk and not of old tin. Men might get relatively wealthy growing corn, but they could not get beastly rich buying it and selling it again. Men gained money making woolens but they did not get fabulous sums for withholding woolens.

Published
1921

49. Murid stress odours: a review and a ‘low tech’ method of collection

Author

Mason, G.J., Ware, N., Dallaire, J., and Department of Animal and Poultry Science

Subjects
stress, General Veterinary, odour, rat, Animal Science and Zoology, signal, General Biochemistry, Genetics and Molecular Biology, alarm, animal welfare
Abstract

Stress cues can affect the welfare of animals in close proximity and are possibly useful non-invasive indicators of the emitters’ welfare. To facilitate their study in murids, we tested whether rats’ stress odours could be collected and stored using an enfleurage-type technique. ‘Donor’ rats were individually exposed to a compound stressor (carriedcirca75 m inside a novel container, then euthanised with rising carbon dioxide) while on blotting paper dotted with melted vegetable lard. These sheets were sealed, left at room temperature for 2-5 h, and then ‘bioassayed’ by a blind observer for their effects on conspecifics. Compared with control sheets (exposed to unstressed rats, to CO2alone, or untreated), stress-exposed sheets significantly affected the unconditioned behaviour of 16 pairs of detector rats trained to enter an arena from their home cage to obtain sucrose. When used to line this arena, the stress-exposed sheets significantly increased: i) rats’ latencies to eat, to place front feet into, and to completely step into the arena and ii) shuttling movements between arena and home cage. These pilot data thus suggest that odours produced by stressed rats can be simply and successfully collected and stored for several hours, though certain potential confounds (eg urine volume) may conceivably be alternative explanations for the observed effects. Future work should control for urine volume, and assess whether fat is needed for optimal odour absorption by paper and for how long sheets can be stored at various temperatures. Much fundamental work is also still needed on the nature, functions, and sources of stress odours.

50. Fundamental nucleus assimilation behaviour of haematite- and goethite-containing ores in iron ore sintering.

Author

Ware N., Manuel J., Ware N., and Manuel J.

Abstract

The CSIRO laboratory-scale assimilation test is carried out by embedding ore particles into a fluxed matrix of known sinter blend composition. Samples are fired in a tube furnace under controlled conditions simulating the actual sintering process. The aim is to isolate and evaluate the nucleus behaviour of an individual blend component. Measured cross-sections of the resulting fired samples provide a semi-quantitative measure of reactivity, while accompanying photomicrographs allow a qualitative assessment of assimilation properties. Nucleus particles were selected from haematite, haematite-goethite and goethite ores and embedded in a simulated plant sinter matrix. Drilled core particles of two sizes were tested at fixed temperatures simulating low-temperature (less than 130 degrees C) and high-temperature (greater than 1 300 degrees C) sintering conditions. The resulting assimilation properties are compared and discussed as a function of particle size, temperature and ore/sinter mineralogy. The implications for the contribution of each component in the prediction of blend sinter quality are also discussed.(Authors)., The CSIRO laboratory-scale assimilation test is carried out by embedding ore particles into a fluxed matrix of known sinter blend composition. Samples are fired in a tube furnace under controlled conditions simulating the actual sintering process. The aim is to isolate and evaluate the nucleus behaviour of an individual blend component. Measured cross-sections of the resulting fired samples provide a semi-quantitative measure of reactivity, while accompanying photomicrographs allow a qualitative assessment of assimilation properties. Nucleus particles were selected from haematite, haematite-goethite and goethite ores and embedded in a simulated plant sinter matrix. Drilled core particles of two sizes were tested at fixed temperatures simulating low-temperature (less than 130 degrees C) and high-temperature (greater than 1 300 degrees C) sintering conditions. The resulting assimilation properties are compared and discussed as a function of particle size, temperature and ore/sinter mineralogy. The implications for the contribution of each component in the prediction of blend sinter quality are also discussed.(Authors).

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