So far, researches on preheater tower structures under the action of severe earthquakes in our country are not enough and no specification or code can be used as the basis for its design. Taking the constructions of the preheater tower structures in high seismic areas and its characteristics into consideration, it's necessary to conduct in-depth researches about the seismic performance of the preheater tower. This paper takes a concrete-filled steel tube frame which works as preheater tower structure of a 5 000 t/d NSP cement production line located in a 9 degree seismic fortification area as a research object, and study the elastic-plastic time history analysis under the seismic action with the finite element software LS-DYNA. The results show that the structure system has good seismic  behaviour; Under severe earthquake, the deformation of structure can meet the requirements of the relevant specification; Structural seismic performance is with large redundancy and the influence of the vertical earthquake action to the structure cannot be neglected. At last, the optimization of the structure is studied.

Determination method of mercury in sludge and materials of cement kilns by atomic fluorescence spectrophotometer is researched and developed . It uses aqua regia and boiling water bath as digestion system, 5%HCl as carrier fluid, 0.5% KOH and 1.5% KBH4 as reducing agent. Moreover instrument condition has been optimized. Detection limit, accuracy, precision and recoveries of samples have been studied.

Using lignin as raw material, through Mannich reaction, the diethanolamine is drawn to lignin, which has the typical cement grinding aid groups. Research shows that this method can effectively improve the nitrogen content in lignin. Orthogonal analysis shows that the best method would be achieved when the quality ration of the lignin, formaldehyde, diethanolamine is 1:1:1.8, the best reaction temperature is about 60℃, reaction time is 3 hours.

Guang dong provincial standard DB44/T 1116 -2013 Cement for Common Ready-mixed Mortar has been released and implemented since July 15, 2013. Common ready-mixed mortar cement is a kind of new cement based on the ready-mixed mortar and masonry cement, it can significantly reduce the energy consumption and production cost of ready-mixed mortar. In order to promote the use of common ready-mixed mortar cement, development, main contents and technical requirements of the local standard of Guangdong province Cement for Common Ready-mixed Mortar is introduced in this paper，which is expected to promote the development of cement standard system in our country.