Germany: Gebr. Pfeiffer says it is planning to use its TRT Triplex dryer to partially calcine gypsum. Testing at the Gebr. Pfeiffer test station has yielded ‘positive’ results and further installations are being considered to explore the concept. The product uses the uniflow principle, where both material and hot gasses flow in the same direction and pass through the dryer tubes from the centre outwards.
The engineering company has received an order for a TRT 5000/8.0 Triplex dryer from Shree Cement in India. The dryer will be used to dry flue gas desulphurisation (FGD) gypsum from a captive coal-power plant for use in cement plants. In the planned dryer plant the moisture of the FGD gypsum will be reduced to a residual moisture of <2%. Artificial gypsum from the dryer will be used at other cement grinding plants in the country. The 50t/hr dryer will be installed at the end of 2018 and is expected to start commercial operation in mid-2019.
