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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Deriving Value from Challenging Waste Materials: Recycling and Sustainability Joint Session
Presentation Title D-21: Removal of Magnesium from Liquor Produced by Nickel Mining by Crystallization
Author(s) Kristine Bruce Wanderley, Jorge Alberto Soares Tenório
On-Site Speaker (Planned) Kristine Bruce Wanderley
Abstract Scope Mining of nickel ores generates large volumes of waste that must be removed in order to eliminate water contamination and reduce environmental impacts created by waste barriers. In this context, the need for innovations concerning the recovery of magnesium present in the liquor produced by the leaching of nickel laterite with sulfuric acid arises. Therefore, this work aims to develop a study regarding the crystallization of magnesium from a synthetic liquor solution using a batch autoclave system at high temperature. Agitation speed was kept constant at 1000 rpm throughout the 3 hours of batch reaction for temperatures of 230 °C and 200 °C. Aliquots taken at each hour were analyzed by ion chromatography to measure magnesium concentration. The highest magnesium removal was observed for temperature 230 °C. X-ray diffraction (XRD) and scanning electron microscopy (EDS-SEM) analysis proved that the product formed was magnesium sulphate monohydrate crystals. Thermogravimetric analysis coupled with a mass spectrometer was used for the evaluation of the thermal stability of magnesium sulphate monohydrate. It was found that MgO and SO2 were formed by the decomposition of the salt at 1100 °C.
Proceedings Inclusion? Planned:

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Chromium Removal from Iron-rich Waste Generated during Processing Lateritic Nickel Ores
D-10: Indium Extraction of Obsolete LCD Screen
D-11: Alternative Method for Materials Separation from Crystalline Silicon Photovoltaic Modules
D-12: Calcium Aluminate Cement Paste Blended with Steel Slag
D-13: Structure-Property Relation Of Asphalt Blended With Electric Arc Furnace Dust (EAFD)
D-14: Preparation Study of Ceramic Materials with Red Mud and Flying Ash as Raw Materials
D-15: Research on Optimization of Sintering Mixture with Low-grade Complex Ore
D-16: Bioleaching Process for Metal Recovery from Waste Materials
D-17: The Characterization of Hydrotalcite-like Compounds Derived from Blast Furnace Slag : Synthesis, Flame Retardancy
D-18: Preparing Ferrosilicon Alloy with Copper Slag
D-19: Study on Adsorption Performance of Ammonia by Zeolite Synthesized from Blast Furnace Slag
D-20: Chemical Analysis of Sludge Originating from Industrial Painting Performed in Brazil
D-21: Removal of Magnesium from Liquor Produced by Nickel Mining by Crystallization
Direct Preparation of Metal Doping Ni-Zn Ferrite from Zn-containing Electric Arc Furnace Dust by Calcination Method
Evaluation Of Battery Waste As Pigment
Hydrometallurgical Processing of Copper Smelter Dust for Copper Recovery as Nanoparticles: A Review
Investigating the Use of Recycled Machining Waste as an Alternative Feedstock for Metal Additive Manufacturing
Kinetic Studies on the Recovery of Chromium from Stainless Steel Slags
Lithium-ion Battery Recycling Through Secondary Aluminum Production
Maximizing the Values of Steelmaking Slags
Recovery of Iron From Red Mud By Magnetic Roasting and Direct Reduction
Recycling in the Real World -- Challenges and Functional Approaches for the Recycling of Complex Products and Hazardous Materials
Recycling of Glass Polishing Sludge into Heavy Clay Ceramic
Reducing the Silica Content of Copper Slag by Flocculation and Reverse Flotation
Separation and Comprehensive Utilization of Valuable Elements in Ti-bearing Electric Arc Furnace Molten Slag
Synthesis of Magnesium Oxide from Ferronickel Smelting Slag through Hydrochloric Acid Leaching-Precipitation and Calcination
Synthesis of New Arsenic Adsorbents from Waste Water of Steel Processing Plant
Understanding Variability in Industrial Boiler Ash Waste for Use in Alkali Aluminosilicate Systems
Value-Added Processing of Tannic Acid and Related Waste Materials for Halogen-Free Flame Retardants

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