Heyl & Patterson Blog

Talc Processing and Applications

Posted by H&P Blog on Wed, Dec 09, 2015 @ 09:18 AM

Talc is a metamorphic rock and the softest mineral on Earth.  It is so soft that a fingernail will scratch its surface, and geologists can recognize it by its greasy feel.  Talc is a hydrous silicate of magnesium, Mg3Si4O10(OH)2, and usually contains small quantities of nickel, iron and aluminum as impurities.  It occurs commonly in thin layers known as foliafolia, but is also found in coarsely granular, finely granular crystalline masses.  Talc appears transparent to opaque, is rarely colorless, and can be found in hues ranging from white to purple.  One form of this mineral is soapstone, or steatite, which is a larger granular form of talc that is also rich in magnesium.



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Tags: process equipment, calciners, mineral processing, rotary coolers

Magnesium Oxide Production Through Calcining

Posted by H&P Blog on Wed, Nov 11, 2015 @ 09:31 AM

Magnesium oxide, commonly called magnesia, is an inorganic compound that occurs naturally in the metamorphic rock known as periclase, which can be found in some forms of marble.  Its name comes from the Magnesia region of Asia Minor, which gave rise to the word "magnet" because of the local stone's magnetic properties.  Magnesium oxide is a particularly pure white mineral that is odorless and soluble in water.  Known by the chemical formula MgO, it is formed from bonding magnesium ions in a lattice with oxygen, which gives it a crystalline structure.  It is typically processed into a fine, white powder.

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Tags: process equipment, calciners, powder & bulk solids, mineral processing

Understanding Kaolin Processing, Mining and Uses

Posted by H&P Blog on Wed, Nov 04, 2015 @ 08:51 AM

Kaolin was first discovered in the hills of southeastern China, and its name translates as "high ridge" as a reference to the area of the country where it is mined.  It was first mined on a large scale during the 7th century to manufacture porcelain, and still produces large quantities of the world's supply, giving it an alternate name of China clay.  Although China has an abundance of this white powdery clay material, its quality in that region of the world is lacking.  Kaolin is found around the world, but high-quality deposits that boast exceptional whiteness, viscosity and other favorable characteristics are rare.  The United Kingdom, Brazil and southeast United States each have formations of remarkable quality.

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Tags: industrial dryers, rotary dryers, calciners, powder & bulk solids, mineral processing

Characteristics and Benefits of Torrefied Wood

Posted by H&P Blog on Wed, Oct 21, 2015 @ 09:24 AM

The daily news reverberates with discussions about the adverse global impact humans have on the environment.  Scientists study how we can lessen it, by reducing our individual carbon footprints and making the overall move to green energy sources.  Finding a clean, efficient and relatively inexpensive replacement for the world's ubiquitous use of coal in fossil fuel power plants is a massive part of that discussion.  Some companies are considering the replacement of coal with a form of processed biomass material known as torrefied wood, and there needs to be an understanding of its storage characteristics.

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Tags: torrefaction, calciners, biomass

Heyl & Patterson to Host Lab Facility Tour for Activated Carbon

Posted by H&P Blog on Wed, Sep 09, 2015 @ 09:07 AM

Activated carbon is a form of charcoal that has been treated with oxygen to open up millions of tiny pores between its carbon atoms.  It is an excellent source of water filtration, and is made from carbon-rich source materials such as wood, bamboo, nutshells, peach pits and coconut husks.  The material is charred at high temperatures to produce a highly porous substance that attracts and holds organic chemicals inside it.  It can be used to remove volatile organic compounds (VOCs) such as benzene and chlorine, as well as odors and colors, from water.

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Tags: process equipment, calciners, activated carbon, catalyst processing

Processing of Roofing Granules for Use on Asphalt Shingles

Posted by H&P Blog on Wed, Sep 02, 2015 @ 09:00 AM

Now that September is here, autumn won't be far behind.  The fall season is often associated with harvests, the start of a new school year, colder weather and it is considered to be the best time to re-shingle a roof.  Weather conditions are optimal, and the shingles have time to form an airtight barrier prior to the first snowfall of winter.  Asphalt shingles are by far the most popular roofing option in the United States.  They are affordable, durable and need minimal maintenance, so it is not difficult to understand why they are the preferred roofing material by roofers and homeowners alike.  Many types of asphalt shingles are expected to have a lifespan of about 20-25 years.

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Tags: calciners, powder & bulk solids, mineral processing

Lithium Mineral Processing for a Variety of Uses

Posted by H&P Blog on Wed, Aug 19, 2015 @ 09:04 AM

Lithium has quickly become one of the best and most popular material choices for batteries.  The main reason the lithium-ion (Li-Ion) battery supplanted its predecessor, nickel cadmium (NiCd) was because the former is capable of producing a wider, stronger range of voltages, without suffering from a "memory effect" that makes it remember the point in its charge cycle where recharging began.  Given an equal voltage, a lithium-ion battery is smaller in size and lighter in weight than a corresponding nickel cadmium or even nickel metal hydride (NiMH) battery, and has virtually no self-discharge.  This allows a lithium-ion battery to be stored for months without losing charge, and they also tolerate a wider range of temperatures.

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Tags: process equipment, calciners, mineral processing

Yellowcake Processing to Remove Impurities From Uranium

Posted by H&P Blog on Wed, Aug 05, 2015 @ 10:06 AM

Yellowcake is a mixture of uranium oxide that is produced from the milling of uranium ore.  It is an intermediate step in the processing of uranium after it has been mined, but before fuel fabrication takes place.  The material is characterized by small, coarse granules with a pungent odor.  Even though it is radioactive, it is safe when stored and handled properly.  This yellow cake is typically created from ore at the mine site through a leaching process, and is what remains after drying and filtering, before being stored in drums to be transported to an enrichment plant.

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Tags: process equipment, calciners, powder & bulk solids, mineral processing

Rare Earth Elements Processed with Rotary Calciners

Posted by H&P Blog on Wed, Jul 29, 2015 @ 09:38 AM

Rare earth elements are a set of 17 chemical elements in the periodic table, and are known to the U.S. Department of Energy as "technology metals." Their magnetic, phosphorescent and catalystic properties are greatly responsible for our 21st century high-tech society. Despite the name, they are relatively abundant in the Earth's crust, but it is unusual to find them in quantities significant enough to support economic mineral development. Rare earth elements have become a hot commodity as more and more uses for them are found. Used in everything from computer memory to nuclear reactors, rare earths are becoming increasingly important in the development of modern technology.

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Tags: process equipment, calciners, mineral processing, catalyst processing

Foundry Sand Reclamation via Thermal Processing

Posted by H&P Blog on Wed, Jul 01, 2015 @ 09:00 AM

Foundry sand, or molding sand, is essential to the metal casting industry.  It consists of a clean, uniformly sized, high-quality type of silica sand that can be used to form molds for ferrous and nonferrous castings.  Formed metal objects ranging from engine parts to building plaques are made with two halves of a sand mold that produce a pattern, and molten metal is then poured to into holes to fill the void inside.  Silica's high fusion point and low rate of thermal expansion produce sturdy molds compatible with a wide range of pouring temperatures and alloys.  Once the casting process is complete, the molds are broken apart and the foundry sand is recycled to produce new molds.

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Tags: process equipment, calciners, sand