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Step-type heating furnace is a kind of mechanized furnace hearth furnaces, due to the corrosion of heating furnace lifting framework is serious, which needs to repair. This article uses the Pro/E to build heating furnace lifting framework model, and then it is leaded to ANSYS which can analysis the stress of framework. Firstly, the framework model that has been corroded and damaged should be analyzed for summing up the framework’s damage and dangerous points and determining the framework reparative plan. Then framework model after being repaired needs to analyze with the same load, the analytical result of which should be compared with that of original design’s framework, and reparative plan should be corrected and examined. Finally, the reasonable framework reparative plan will be determined.

Study the equation of motion of cut head on flying head, and get the trajectory curve.According to the analysis about trajectory curve,build a baffle on the bell mouth behind the guide groove of flying shear , and determine the position of the baffle, solve the problem that steel head often inserting into the guide groove behind flying shear, which affect the process of steel inserting into the following mill group, and even cause run steel accident.

Silt is widely distributed in coast area. Its consolidation is a popular geotechnical engineering issue. Coast silt is always under seasonal wave and tide, which made great influence on the consolidation process. Abundant lab and in-situ tests are used to study on the physical-mechanical properties of Xiamen coast silt. The engineering characteristic of the coast silt taken from Xiamen is evaluated and the relationships between physics and mechanics indexes such as compression coefficient, water content, void ratio, cohesion and internal friction angle are analyzed, and the linear regression equations between silt parameter is established. Then two in-situ tests cone penetration test (CPT) and flat dilatometer test (DMT) are applied to study the properties of coast silt, abundant in-situ test data obtained.