In 2010, a study at Jura Cement successfully installed thin stainless-steel sheets between the refractory lining and the kiln shell, with the positive effect of significantly reducing the corrosion of the shell caused by alkali chloride penetration.

At Jura Cement plant, the 0.6 mm thick sheet of steel grade 1.4404 (AISI 316) provides ideal protection for a large part of the kiln. Alumina bricks impregnated with silica sol are used with good results to slow down or neutralise the penetration of alkali chlorides and sulphates in the 28 m section and above.

In the 22-28 m section, the stainless-steel sheets were still largely dissolved after an operating period of 11 months, and tests are therefore being carried out with other material sheets to achieve even better protection of the kiln shell.

Sacrificial heet helps to clean the kiln shell. The heat resistant stainless steel: AISI 304 (1.4301) is great for refractory, with recommended thickness of 0.6 – 0.8 mm to avoid unstable lining. The Maximum sheet width: 1.5 m is made for easy installation.