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Rotating injector for furnace

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Aluminium melting requires furnace fluxing or treatment to remove impurities. In order to meet quality requirements, dissolved alkalis like sodium and calcium, non- metallic inclusions and hydrogen need to be removed. Furnace fluxing is still used either by spreading solid flux on the metal surface or using fluxing lances (chlorine). These methods can be replaced by the FRI-3000 rotating injector, which uses chlorine gas mixtures to significantly improve the efficiency of the fluxing process.


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 INTRODUCTION

 

1.1   How it Works

Aluminium melting requires furnace fluxing or treatment to remove impurities. In order to meet quality requirements, dissolved alkalis like sodium and calcium, non- metallic inclusions and hydrogen need to be removed. Furnace fluxing is still used either by spreading solid flux on the metal surface or using fluxing lances (chlorine).  These methods can be replaced by the FRI-3000 rotating injector, which uses chlorine gas mixtures to significantly improve the efficiency of the fluxing process.

The main element of the FRI-3000 is the spinning nozzle, through which a carrier gas (nitrogen) delivers the fluxing agent (chlorine gas) underneath the metal surface. The fluxing agent is dispersed through the combined actions of the disperser and the injection of the carrier gas.

Since every plant and even every furnace is of different sizes and shapes, designs have been developed and adapted to meet any type of layout constraints.

1.2   Key Features

 Metal Quality Improvement

º Optimum efficiency of alkali removal (sodium, calcium).

º Improved metal cleanliness (inclusion reduction).

 Productivity Improvement

º High stirring efficiency for metal homogenization (alloying and temperature).

º Reduction of dross generation.

º Increased furnace productivity.

 Safe Operating Environment

º Reduction in fugitive and atmospheric emissions.

º Safe operation for employees.


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