The main user of the refractories is the iron and steel  industry segment related to transporting, processing and casting of the molten metal (iron and steel).

At present, masses with good thermal, mechanical and chemical properties are imported, As a result of the analysis of the wear influences which the refractories in contact to the hot metal and slag are subjected to (mechanical and erosion stress, abrasion, ferro-static pressure, radiation rate – temperature >1500°C, chemical stress – corrosion caused by the slag attack), new refractory plastic mud gun masses for covering the hot metal taphole and the slag notch have been obtained and tested in the laboratory.

 Improvement of the properties of the present plastic masses was aimed by adding materials that could offer the new masses the best thermal, mechanical and chemical characteristics, thus being obtained environment-friendly anhydrous plastic refractory masses by replacing the tar with a inorganic binding matter.

Plastic refractory masses of different compositions have been obtained in the laboratory.Their physical, chemical and mechanical characteristics have been defined after heating and thermal treatment.