Cement is a finely ground building material and is produced in cement plants. The raw material for cement is grounded and blended from mainly natural raw materials in a dry process, then burned, cooled and ground again in a continuous process in rotary kilns, where an intensive heat exchange takes place between the hot kiln exhaust gases and the raw meal, which reaches a temperature of about 850°C.

 

Since flour with a temperature of up to 850°C can escape from the preheaters of rotary kiln plants even during normal maintenance work, employees in
this area must be permanently equipped with appropriate PPE. A suit made of Nomex® Outershell Tough has proven to be the best choice for this purpose.

 

For cleaning work, e.g. poking at the heat exchanger, head protection and gloves made of aluminized para-aramid material (ARATEX) should be worn in
addition to a protective suit made of Nomex®.

 

In case of cyclone blockage, the protective equipment should be supplemented by aluminised PPE made of para-aramid fibres, either in the form of a long coat
or in the form of a jacket and trousers. If protective boots are not worn, then the lacing of shoes should be protected by gaiters against the penetration of hot powder. The closure of the jacket or coat is designed in such a way that a penetration of hot powder is prevented.