Reduced production per unit time
In the rough rolling stage, a slow rolling speed directly leads to a reduction in the amount of billets passing through the rolling mill per unit time. For example, under normal rolling speed, 10 billets can be rolled per hour. However, when the speed is too slow, only 6 - 7 billets may be rolled per hour, which significantly reduces the output in the rough rolling stage. For large-scale shipbuilding steel production, this reduction in output will affect the progress of the entire production plan.
Since rough rolling is the preceding stage of subsequent processes such as finish rolling, a slow rough rolling speed will cause a chain reaction. In the finish rolling stage, there may be an increase in equipment idle time due to waiting for billets after rough rolling, which in turn leads to a reduction in the production efficiency of the entire production line.

Deterioration in energy utilization efficiency
When the rolling speed is too slow, the billet stays in the rolling mill for too long, and the equipment needs to be in operation for a long time to roll the same output of billets. For example, the motor needs to run continuously, and the heating equipment also needs to work continuously to maintain the appropriate temperature of the billet, which will lead to an increase in energy consumption per unit output.
From the perspective of energy utilization, in a long production process, there are relatively more energy losses of the equipment (such as heat loss of the motor and mechanical friction loss of the rolling mill), which reduces the proportion of effective energy actually used for billet deformation and further reduces energy utilization efficiency.

Increased production costs and time costs
Extended production time will increase labor costs. Operators need to spend more time to complete the production task of the same output, including monitoring and operating the equipment, etc., which increases labor costs.
Long-term operation of the equipment will not only increase energy costs but also increase the depreciation cost and maintenance cost of the equipment. Because the longer the equipment runs, the faster its parts will wear out, and maintenance and replacement are needed more frequently, thereby increasing production costs. At the same time, the extension of the production cycle may also lead to delays in delivery time, affecting the economic benefits and market competitiveness of enterprises.

 

 

 

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