球团烟气脱硫石膏制备α型高强石膏的研究

The Research of Preparing α High-strength Gypsum with Pellets Flue Gas Desulfurization Gypsum

以球团烟气脱硫石膏作主要原料,添加剂使用丁二酸和十二烷基苯磺酸钠,并使用加压盐溶液的方法研制出抗压强度能达到45 MPa以上的α型高强石膏。分析了球团烟气脱硫石膏的物理及化学性能,转晶剂的含量与种类以及工艺条件对制品性能的影响,揭示了α型高强石膏的形成机理。结果表明:在使用加压盐溶液方法的前提下,温度、转晶剂用量、盐溶液浓度都会对制品的强度产生影响。

Using pellets flue gas desulfurization gypsum as the main raw material, adding succinic acid and dodecyl benzene sulfonic acid sodium as crystal agent, by the way of salt solution pressure, the compressive strength can reach more than 45 MPa of α high-strength gypsum can be prepared.Analyzed the physical and chemical properties, types of content and crystal agent and the influence of process conditions on product performance of pellets of flue gas desulfurization gypsum, revealed the formation mechanism of α high-strength gypsum. The results showed that： on the premise of using pressurized salt solution method, temperature, crystal agent, concentration of salt solution have strong influence on strength of products.