Polysius AG supplied a second lime shaft kiln to Saudi Sand Lime & Bricks in Riyadh/Saudi Arabia. The kiln, with a rated output of 200 t/d of burnt lime was handed over to the customer at the end of February 2011. In 2005, Polysius put the first lime shaft kiln into operation at the Riyadh plant. Both kilns produce high-grade lime for use in steel production and as a binding agent for sand-lime brick production. In addition to the two Polysius kilns, Maerz Ofenbau AG of Switzerland – a member of the Polysius Group – installed a shaft kiln there in 2007 for producing lime as a binding agent for cellular concrete. The business relationship with Saudi Lime & Bricks has existed since the 1970s. At that time, Polysius supplied a complete sand-lime brick factory to Riyadh.