Dry sampling - Auger

System overview

The main feature of the Insitec particle sizing system is the ability to monitor the cement fineness (and therefore estimate compressive strength) in real-time. Continuous representative extraction of sample takes place in two parts:

• Primary sampling
  A screw auger is installed in the process stream. Sample is extracted continuously (according to ISO 8656-1) and is delivered into a second smaller chute, the bottom of which is the return leg into the process stream. Representativity ensured used variable screw, enabling increased sampling from process stream edges.
  
• Secondary sampling
  An eductor system is used to continuously aspirate cement from the secondary stream, disperse it correctly and then deliver it as a high velocity jet to the measurement zone of the analyzer. Measured cement is then returned to the secondary leg for re-injection into the process stream.

Process interface

The Auger system is supplied by Iteca, a company which has over 30 year experience in development and installation of On Line Analyzers and Controllers for Cement & Lime industry

Abrasion resistant components are used such as a ceramic venturi in the sample eductor.

The sampling system has the following benefits:

Simple reliable concept

• Proven industrial usage and acceptance
• Spares readily available
• Familiar to site maintenance staff and operators
• Reliable tonnes to kg conversion
  

Representative sampling

• Sampling to ISO 8656-1
• Application specific auger flight profile
• Spool piece optimized for application
• Application specific pressure balancing
  

Malvern Link system integration

• Simple customized user interface
• Simplified operator and maintenance training
• Simplified connection to plant control system
  

Customer quality procedures easily accommodated in design

• Other sampling accessories easily fitted (e.g. Grab samplers)

	More information - Auger specifications
	The secondary sampling system is carried out using an abrasion resistant Jet-stream eductor