Control method for reducing common steel refining power consumption

Abstract

The invention discloses a control method for reducing common steel refining power consumption. The control method is applied to a 125t steel ladle. The control method comprises the following steps of adding a slag former during refining entering. According to the control method, a foaming agent is added during refining entering. By means of the technical scheme, the molten steel station entering slagging amount is increased, and submerged arc stability is promoted; the foaming agent is added to promote foaming and improve the submerged arc efficiency; the heating rate is increased, the power transmission time is reduced from 8-9 min / furnace to 6 min / furnace, and the heating rate is increased from 3-4 DEG C / min to 6-7 DEG C / min; the power transmission time is shortened, the production rhythm is stabilized, and the power consumption is reduced from the original about 19 kwh / t to about 10 kwh / t; and the submerged arc efficiency is improved and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting production technology, and relates to the refining technology of common steel. More specifically, the present invention relates to a control method for reducing power consumption in common steel refining. Background technique [0002] At present, in order to ensure the production rhythm, various iron and steel enterprises basically adopt the shallow refining control method in the production of ordinary steel, in order to achieve the purpose of stabilizing production and reducing costs. However, in actual production, general steel (such as HRB / MG and other series) is refined and smelted mainly as follows: less slag, long power transmission time, unstable submerged arc, slow temperature rise, and easy slag splashing; resulting in constant power consumption for refining at a high level. For example, in the 125t ladle of a general steel factory, the temperature of molten steel enteri...

AI Technical Summary

Problems solved by technology

However, in actual production, general steel (such as HRB / MG and other series) is refined and smelted mainly as follows: less slag, long power transmission time, unstable submerged arc, slow temperature rise, and easy slag splashing; resulting in constant power consumption for refining at a higher level

For example, in the 125t ladle of a general steel factory, the temperature of molten steel entering refining is low, the amount of slag is small, the power transmission submerged arc continues to be unstable, and the heating rate is slow, generally 3-4°C / min, resulting in long power transmission time and average power transmission. The electricity time reaches 8-9min / furnace, and the electricity consumption is about 19kwh / t, resulting in high cost