SU167635A1 - - Google Patents

Description

Methods are known for the destruction of the lining and foundation of aluminum electrolysis cells using a jackhammer and devices using a pneumatic hammer.

To reduce dismantling time, it is proposed to destroy the lining and foundation of an aluminum electrolysis cell with the help of explosions. The following parameters and sequence of destruction operations are observed. First, the hearth coal blocks explode, then the side lining, and after the destruction of the destroyed mass, the blooms explode, then the strip foundation and concrete concrete.

To effectively destroy the bottom coal blocks, the holes are positioned along the longitudinal axis of the block to a depth of blooms at a distance of 35-40 cm from each other. The weight of the charge is 0.04 kg.

In case of destruction of the side lining, conditions must be observed to prevent deformation of the casing of the electrolyzer. To do this, it is necessary to place the holes in one row along the perimeter of the electrolyzer at a distance of 5-10 cm from the wall of the casing and 60 cm from each other. The depth of the hole is 0.6-0.7 m; weight of charge is 0.06 kg.

Effective blasting of the blooms is achieved by positioning the holes at the junction of the blooms. In this case, the explosion acts in the direction of the ends of the blooms and separates them from the underlying slag mass. This gives

the ability to bring the slings under the blooms and using a crane to remove them from the electrolyzer. After the blooms are removed, the bottom of the electrolyzer is disassembled from the fireclay and paint bricks and the strip foundations and concrete strapping are blown up.

In order not to damage the anchor bolts during the explosion of the foundation, it is necessary to locate the holes around its perimeter at a distance from the research institutes from the bolts to the loosening funnel of at least 20 cm.

Due to the presence in the electrolysis shop of a large magnetic field, the blasting is carried out only by a detonating cord.

When dismantling electrolyzers in this way, the overhaul period is reduced by 3.5 days compared to the known ones.

Subject invention

The method of destruction of the lining and foundation during the dismantling of the aluminum electrolysis cell, characterized in that, in order to shorten the dismantling work, the destruction is carried out by sequential blasting of the elements when drilling holes are located along the longitudinal central axis of the bottom coal blocks to blooms, along the side lining at 5 -10 cm from the casing wall at the junction of the blooms and along the perimeter of the strip foundation, at a distance of at least 20-30 cm from the anchor bolts.