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

Mica Processing: Methods, Uses and Applications

Posted by H&P Blog on Wed, Oct 14, 2015 @ 10:00 AM

Mica is a mineral of the silicate family, and is known to most people as the glittering gold flakes in some rocks.  It splits into thin sheets when fractured, and is found in all three types of typical rock formations. The most common is muscovite mica, also called potassium mica, which is found in both metamorphic and igneous rocks.  A black-colored variant called biotite commonly appears in igneous rocks such as granite, and also appears in metamorphic rock.  It is comparatively rare in sedimentary rocks, but where it does appear, its thin gold-like flakes are often confused with the genuine material.  Hence the term "fool's gold."

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Tags: rotary dryers, process equipment, MultiDisc thermal processor, fluid bed dryers, mineral processing

Bauxite Dryers for the Aluminum Production Process

Posted by H&P Blog on Wed, Oct 07, 2015 @ 09:30 AM

Bauxite is the world's primary source of aluminum, one of the most useful and versatile metals known to man.  Aluminum is used for cookware, baseball bats, chairs, aluminum foil, electronics, coins, cans, flagpoles, heat sinks and transportation.  One scholar of J.R.R. Tolkien even suggests that the fictional element mithril might actually be aluminum.  The mineral was discovered in 1821 by the French geologist Pierre Berthier, near the village of Les Baux in Provence, southern France.  French chemist Henri Sainte-Claire Deville later named the mineral after the town itself.

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Tags: industrial dryers, rotary dryers, process equipment, mineral 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

Drying Potash Leads to the Highest Quality Final Product

Posted by H&P Blog on Wed, Jun 10, 2015 @ 09:18 AM

Mined and manufactured salts containing water-soluble potassium are known as potash.  Prior to the Industrial Revolution, the primary means of obtaining it was by using water in a pot to leach it from wood ash, hence the name "potash."  In fact, the scientific name "potassium" was derived from the word.  It is now mined from ancient marine seas where it is found in abundance, occurring naturally as potassium salts, or as we know it, "table salt."  Potash is then processed from potassium compounds and potassium-bearing materials, usually as potassium chloride.  This salt is separated from the potash and used for a variety of salts -- table salt, livestock salt, water softener, and road de-icer.

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Tags: industrial dryers, fluid bed dryers, fertilizer, mineral processing