India: Shree Cement has ordered a TRT 5000/8.0 Triplex dryer from Germany’s Gebr. Pfeiffer. 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.
Gebr. Pfeiffer is also planning to partially calcine the gypsum in future installations of the dryer. The TRT Triplex dryer 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. Testing at the Gebr. Pfeiffer test station have yielded ‘positive’ results and further installations in other plants are being considered.
