Minerals Technologies Inc. · NYSE:MTX
Minerals Technologies — Technical Presentation (February 2024)
12 slides from Minerals Technologies's technical presentation, February 2024
Slide 1: Hevi-Sand Chromite Sand Testing
HEVI-SAND’ Chromite Sand Testing MINERALS TECHNOLOGIES wy Metalcasting ADDITR» L (A) VOLeLAY ARHEVI-SAND®
Slide 2: Typical Chromite Sand Testing
Typical Chromite Sand Testing • South African Chromite Sand is the world standard for metalcasting and foundry applications, however there can be variations in the quality of chromite sand depending on grade, location, mining and beneficiation methods. • There are many tests that are available to pr
Slide 3: Moisture
Moisture • This is an easy but important test. Moisture can severely impact typical chemical binder systems often used with mineral sands and result in incomplete curing and low tensile strengths. • The moisture percentage can be checked in many ways, but typically is done with an infrared moisture
Slide 4: Chemical Analysis
Chemical Analysis • X-Ray Florescence (XRF) and Inductively Coupled Plasma Mass Spectroscopy (ICP-MS) are the most common approaches to determining the concentration of various elements in the chromite sand. • Results are typically reported as oxide values ( Cr2O3, SiO2 etc.) • Chromium Oxide, Silic
Slide 5: pH and Acid Demand Value
pH and Acid Demand Value pH • The pH test is a measure of the amount of hydronium ions present in a solution. The pH test is used to determine the acidity or alkalinity of a sand when mixed with water. • Chromite sand is typically slightly basic with a pH value between 7-9. • pH is reported on a log
Slide 6: Loss on Ignition
Loss on Ignition • The loss on ignition test is a test to measure the change in weight of a sample (gain or loss) when a sample is heated to 982°C • Material can lose weight due to removal of volatile organics, removal of chemically bound water, disassociation of inorganic compounds and accessory mi
Slide 7: Turbidity- Traditional
Turbidity- Traditional • The turbidity test measures the amount of light scattering caused by the fine particulates that are left suspended in water after agitating chromite sand for a fixed amount of time. • In traditional processing methods these fine particulates are often low melting silicates t
Slide 8: Turbidity- Modern
Turbidity- Modern • In a effort to make the turbidity test more consistent, repeatable, and meaningful, many changes have been made to the traditional turbidity test. • Consistent repeatable agitation of the sand and water mixture is achieved by using a wrist action shaker. Mechanical agitation is m
Slide 9: Particle Size Distribution- AFS GFN
Particle Size Distribution- AFS GFN • The American Foundry Society (AFS) Grain Fineness Number (GFN) is a calculation that is Series Designation Hevi-Sand® derived from the amount of material retained on Standard Alternate a series of nested ASTM E-11 wire mesh sieves. Percent 3.35 mm No. 6 0.00 Ret
Slide 10: Bulk Density
Bulk Density • Density is a measure of mass divided by volume • Bulk density is often measured on aggregates to look for packing efficiency of the particles. It differs from specific gravity and apparent density because the voids between the particles are included in the volume. • Bulk density can b
Slide 11: AFS Tensile Strength Testing
AFS Tensile Strength Testing AFS Tensile Testing –often called “Dogbone” Testing • Tensile strength of various sands (chromite, silica, olivine etc.) can be measured by mixing with a foundry resin system and preparing 1 inch thick (2.54 cm) tensile specimens or “Dogbones”. • The tensile specimens ar
Slide 12: How Can MTI help?
How Can MTI help? • Many of the tests described here are part of typical Hevi-Sand quality control testing. Other tests are used for more customer application specific testing. • Many of these testing methods can be applied to other mineral sands or engineered specialty aggregates • MTI Laboratories
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