Performance analysis for filtered iron ore tailings disposal

2013 ◽  
Author(s):  
Andrea Portes ◽  
Terezinha Espósito
Keyword(s):  
Performance Analysis ◽  
Iron Ore ◽  
Tailings Disposal ◽  
Iron Ore Tailings

scholarly journals Behaviour of Compacted Filtered Iron Ore Tailings–Portland Cement Blends: New Brazilian Trend for Tailings Disposal by Stacking

2022 ◽  
Vol 12 (2) ◽  
pp. 836
Author(s):  
Nilo Cesar Consoli ◽  
Jordanna Chamon Vogt ◽  
João Paulo Sousa Silva ◽  
Helder Mansur Chaves ◽  
Hugo Carlos Scheuermann Filho ◽  
...  
Keyword(s):  
Portland Cement ◽  
Iron Ore ◽  
Triaxial Compression ◽  
Shear Stiffness ◽  
Friction Angle ◽  
Pulse Velocity ◽  
Design Parameters ◽  
Compression Tests ◽  
Tailings Disposal ◽  
Iron Ore Tailings

Failures of tailings dams, primarily due to liquefaction, have occurred in Brazil in recent years. These events have prompted the Brazilian government to place restrictions on the construction of new dams, as iron ore tailings deposited behind upstream dams by spigotting have been shown to have low in situ densities and strengths and are prone to failure. This work proposes a new trend for tailings disposal: stacking compacted filtered ore tailings–Portland cement blends. As part of the proposal, it analyses the behaviour of compacted iron ore tailings–Portland cement blends, considering the use of small amounts of Portland cement under distinct compaction degrees. With the intention of evaluating the stress–strain–strength–durability behaviour of the blends, the following tests were carried out: unconfined compression tests; pulse velocity tests; wetting–drying tests; and standard drained triaxial compression tests with internal measurement of strains. This is the first study performed to determine the strength and initial shear stiffness evolution of iron ore tailings–Portland cement blends during their curing time, as well friction angle and cohesion intercept. This manuscript postulates an analysis of original experimental results centred on the porosity/cement index (η/Civ). This index can help select the cement quantity and density for important design parameters of compacted iron ore tailings–cement blends required in geotechnical engineering projects such as the proposed compacted filtered iron ore tailings–cement blends stacking.

Effects of reductant type on coal-based direct reduction of iron ore tailings

2018 ◽  
Vol 42 (3) ◽  
pp. 453-466
Author(s):  
Wei WANG ◽  
Pengfei YE ◽  
Xiaoli ZHOU ◽  
C WANG ◽  
Zekun HUO ◽  
...  
Keyword(s):  
Iron Ore ◽  
Direct Reduction ◽  
Iron Ore Tailings ◽  
Reduction Of Iron ◽  
Direct Reduction Of Iron

Iron ore tailings as a source of nutrients to the coastal zone

2021 ◽  
Vol 171 ◽  
pp. 112725
Author(s):  
Eduardo Schettini Costa ◽  
Renata Caiado Cagnin ◽  
Cesar Alexandro da Silva ◽  
Cybelle Menolli Longhini ◽  
Fabian Sá ◽  
...  
Keyword(s):  
Coastal Zone ◽  
Iron Ore ◽  
Iron Ore Tailings

On the effects of iron ore tailings micro/nanoparticles in embryonic and larval zebrafish (Danio rerio)

2021 ◽  
Vol 759 ◽  
pp. 143456
Author(s):  
Vítor Otacílio de Almeida ◽  
Talita Carneiro Brandão Pereira ◽  
Lilian de Souza Teodoro ◽  
Manuella Escobar ◽  
Carolina Junqueira Ordovás ◽  
...  
Keyword(s):  
Danio Rerio ◽  
Iron Ore ◽  
Larval Zebrafish ◽  
Iron Ore Tailings

Productivity and food safety of grain crops and forage species grown in iron ore tailings

2021 ◽  
pp. 104198
Author(s):  
Humberto Araújo Almeida ◽  
Janaína Guernica Silva ◽  
Isabela Goulart Custódio ◽  
Decio Karam ◽  
Queila Souza Garcia
Keyword(s):  
Food Safety ◽  
Iron Ore ◽  
Grain Crops ◽  
Iron Ore Tailings ◽  
Forage Species

scholarly journals Iron ore tailings in the production of cement tiles: a value analysis on building sustainability

2018 ◽  
Vol 18 (4) ◽  
pp. 395-412 ◽  
Author(s):  
Wanna Carvalho Fontes ◽  
Giovanni Gonçalves Fontes ◽  
Ellen Cristine Pinto Costa ◽  
Julia Castro Mendes ◽  
Guilherme Jorge Brigolini Silva ◽  
...  
Keyword(s):  
Iron Ore ◽  
Construction Material ◽  
Local Identity ◽  
Value Analysis ◽  
Social And Emotional ◽  
A Value ◽  
Iron Ore Tailings ◽  
Dissolution Tests ◽  
Technical Evaluation ◽  
The Relationship

Abstract The present work discloses the development of a sustainable cement tile (SCT) produced with Iron Ore Tailings from tailings dams (IOT). Initially, technical evaluation and environmental analysis of IOT were performed through physical, chemical and morphological characterisation, leaching and dissolution tests. Its feasibility as a pigment was also investigated. Subsequently, the value analysis was performed, starting from an empathy map to a study on environmental, social and emotional values in the relationship between people and product. As result, the IOT presented fine, crystalline particles, no toxicity, and is technically feasible to be employed as filler, aggregate and pigment in the production of SCT. The colour layer of the SCT presented more homogeneous colour and less pores than conventional ones. Therefore, the design of the SCT was developed, incorporating intangible values such as: environmental ideology, local identity and social expression. In this sense, the present work seeks to assist in the decision-making process involving IOT as construction material.

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