In the rolling mill hoisting, we need to pay more attention to the problem. First of all, for stand-alone and multiple racks of the mill, in the supply, often is the use of split parts of the supply method.
One of the largest components is the rack, which is the arch. Under normal circumstances, the aluminum foil mill rack monolithic weight between 30t to 50t, the height of 7 to 11m, width is in the range of 3.5 to 5m. Because of the structure of the mill frame and the hoisting capacity of the crane in the workshop are different, the way is different when hoisting.
In addition, when hoisting, also need to take into account the construction conditions such as the elevation of the foundation facilities. At present, when the rolling mill hoisting, the operation sequence is usually this: the first step is to carry out the flat flat hanging, and then the machine stand upright, vertical rack hanging, and finally the rack installed in place.
In the hoisting procedure, it not only involves the formulation and selection of hoisting scheme, but also includes the preparation of lifting operation before hoisting, the test crane and the formal hoisting. Next, let's introduce the preparation work that should be done before the lifting operation. For example, a mill rack single weight of 32t, in the construction site prepared a 25t and a 16t bridge crane. As a single crane can not meet the ability to lift the arch, it is necessary to adopt a two-machine lifting method.
At this time should be ready to the corresponding eccentric pole beam, hanging ears and so on. In order to be able to ensure that the rolling mill can be hoisted in place, it is necessary to first the two-Crane car reversing, and then the rolling mill rack after installation, and then the Crown Crane Reset.