Back washing technology for filtration flushing cinder simultaneously tapped from double tapholes in blast furnace bottom

Abstract

The invention relates to a treating technology for blast furnace cinder, in particular to a back washing technology for filtration flushing cinder simultaneously tapped from double tapholes in a blast furnace bottom, which is operated according to the following steps: adding a connection pipeline between a hot water pool and a cold water pool; installing an electric control valve on the connection pipeline; adding and enhancing the water supply quantity of the hot water pool to the cold water pool to 4,300 to 4,500 m<3> / h; measuring the volumes of the cold water pool and the hot water pool aswell as the reduction speed and the reduction time of a back washing water level in tapping; regulating the back washing time to be consistent with the reduction time of the water level; controlling the cinder flushing time to be 6-9 minutes; controlling the back washing water quantity to be 2,300 to 3,500 m<3> / h; adding the water level of the cold water pool to a high level in a cinder flushing process; executing the back washing operation and supplementing the reduced water level after the back washing operation is finished. The technology solves the problem of water quantity balance in simultaneously tapping from the double tapholes. The back washing operation is carried out in the cinder flushing process, thereby solving the problem of no back washing operation due to lack of time after the flushing process is finished.

Description

technical field [0001] The invention relates to a blast furnace slag treatment process, in particular to a blast furnace bottom filtering and flushing slag double taphole simultaneous tapping backwashing process. Background technique [0002] The blast furnace bottom filtering and flushing process is a slag treatment method that has been used for a long time in the blast furnace slag flushing process. It is safe to use, has high reliability, simple equipment maintenance, and low one-time investment. The layers are easy to harden, and it is not easy to replace the filter material layer after hardening. [0003] At present, the utilization coefficient of the blast furnace is relatively high, and the tapping interval is short. In the blast furnace operation, double tapholes are often used to tap iron at the same time. At this time, the water consumption of the slag flushing system increases exponentially, breaking the balance of water consumption. It can only support about 10 ...

AI Technical Summary

Problems solved by technology

[0002] Blast furnace bottom filter slag flushing process is a slag treatment method that has been used for a long time in the blast furnace slag flushing process. It is safe to use, high in reliability, simple in equipment maintenance, and low in one-time investment. The layer is easy to harden, and the filter material layer after hardening is not easy to replace

After the iron tapping interval is shortened, the backwashing operation cannot be completed or there is no time to perform the backwashing operation at all, thus accelerating the blockage and hardening of the filter material layer, and the water filtration speed drops sharply when the filter material layer is hardened, breaking the cooling The hot water level is balanced, and in severe cases, only new water can be added while washing the slag to maintain the slag washing