All Blog Posts about ‘Thermal Processing’

Best Practices in Rotary Dryer Design

This article was co-authored by:

Shane Le Capitaine
Thermal Processing Expert

Carrie Carlson
Technical Writer

Rotary Dryer Design Best Practices

Rotary dryers offer a highly flexible solution to drying bulk solids ranging from specialty chemicals to minerals and ores. But with all this flexibility and opportunity for customization often comes confusion on what configuration will provide the most efficient solution for the job at hand.  Continue reading →

 

Photo of the Week: Frac Sand Dryer

This article was authored by:

Jenny Seim
Technical Writer

Frac Sand Dryer (Drier)

Our photo this week highlights a frac sand dryer. Internal flight design and placement was customized to maximize heat transfer between the frac sand and drying air, utilizing full curtain flighting. Additionally, the flights were bolted to the interior of the drum shell for easy Continue reading →

 

Question of the Week: How does a Rotary Kiln Work?

This article was co-authored by:

Carrie Carlson
Technical Writer

Process and Sales Engineer
Thermal Processing Expert

The interior of a rotary kiln.

Rotary kilns use extremely high temperatures combined with controlled retention times to cause a chemical reaction or phase change in a material. At certain temperatures (different per each material), a material will undergo a chemical reaction or phase change. This is often necessary to bring Continue reading →

 

Top Applications for Rotary Kilns

This article was co-authored by:

Process and Sales Engineer
Thermal Processing Expert

Carrie Carlson
Technical Writer

Top Applications for Rotary Kilns

Rotary kilns (also known as rotary calciners) are used to heat solids to a predetermined temperature in a controlled processing environment in order to create a chemical and/or physical reaction.  While rotary kilns have long been used in producing cement, their flexible capabilities have extended Continue reading →

 

Utilizing Rotary Dryers as Preheating Drums

This article was co-authored by:

Shane Le Capitaine
Thermal Processing Expert

Carrie Carlson
Technical Writer

Rotary Dryers as Preheating Drums

Though far less common than the need to dry or thermally treat a bulk solid material, some process settings call for preheating a material in preparation of downstream processing. In achieving this objective and meeting the high tonnages associated with bulk solids processing, rotary dryers Continue reading →

 

The Importance of Material Characteristics in Rotary Dryer Sizing

This article was co-authored by:

Shane Le Capitaine
Thermal Processing Expert

Carrie Carlson
Technical Writer

Rotary Dryer (Drier) Sizing

The process of sizing a rotary dryer is one of precise engineering involving complex calculations and meticulous design. While the process is not well simplified into a few paragraphs, an explanation can be offered as to some of the concepts behind the process of rotary Continue reading →

 

Question of the Week: What are Indirect Coolers Used for?

This article was co-authored by:

Carrie Carlson
Technical Writer

Shane Le Capitaine
Thermal Processing Expert

What are Indirect Coolers Used For

While indirect coolers are used far less commonly than their direct cooling counterparts, they are often the best solution in a few specialty applications. A direct cooler relies on direct contact between the material and chilled air in order to cool the material, which can Continue reading →

 

Question of the Week: What Causes Refractory Failure in a Rotary Kiln?

This article was authored by:

Jenny Seim
Technical Writer

What Causes Refractory Failure in a Rotary Kiln

Cycling and chemical incompatibility are the two main causes of refractory failure in a rotary kiln. Cycling Cycling is the heating up and cooling down of a rotary kiln, and it is the largest source of refractory failure. Refractory expands with the kiln as it Continue reading →

 

Question of the Week: What is Heat Setting?

This article was authored by:

Jenny Seim
Technical Writer

What is Heat Setting?

Rotary kilns use heat to cause a physical change or chemical reaction in a particular material, and can be utilized to carry out a variety of processes. One of the more common processes carried out in a rotary kiln is heat setting. This refers to the act of Continue reading →

 

Question of the Week: What Causes Rotary Dryer Misalignment?

This article was authored by:

Jenny Seim
Technical Writer

What Causes Rotary Dryer (Drier) Misalignment, Image of Worn Rotary Dryer Tire (Tyre)

Rotary dryer misalignment is oftentimes the result of improper base installation. Misalignment in the base will quickly spread through the rest of the drum, causing wear and damage to other drum components. In addition, misalignment can occur naturally over time as part of normal rotary Continue reading →

 


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