Method for processing electrolytic residue

Abstract

The invention discloses a method for processing electrolytic residue. The method comprises the following steps: firstly, planning a residue dump area into a plurality of filling pits (1) with slope bottoms and respectively arranging water-depositing pits in the lowest positions of the pit bottoms; secondly, respectively digging the filling pits (1) and digging one filling pit (1) once; thirdly, processing the dug filling pits (1) for resisting seepage; fourthly, piling the residue in the filling pits (1) in a direction from top to bottom by segments; covering the surface after leveling and compacting or piling up, compacting and leveling at a higher segment of each pit before leveling and forming a slope with earth dug from each pit, wherein the layer is covered to thickness covering bulkprotrusions in the residue; then, laying a plastic waterproof layer and covering the plastic waterproof layer with the dug earth; and finally, planting herbaceous plants or undershrubs on the surfacecovering layer for greening. The invention is suitable for use in various electrolytic residue dumps.

Description

technical field [0001] The invention relates to a method for disposing waste slag from tank overhaul in an electrolytic aluminum plant. Background technique [0002] In the production process of the electrolytic aluminum plant, it is inevitable to produce various solid waste residues, especially the aluminum electrolytic cell needs to be overhauled after 45 years of use. The waste lining removed during the overhaul is the electrolytic cell overhaul waste residue. Since the lining of the electrolytic cell is mainly composed of refractory materials and carbon materials, the waste residue includes cathode carbon blocks, refractory bricks, paste, insulation bricks, refractory powder, refractory mortar and insulation boards. In the aluminum production process of molten salt electrolysis, the fluoride salt used as a flux contains fluorine element, part of which is absorbed by the lining of the carbonaceous tank, and then diffused into other furnace building materials. According t...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for disposing of electrolytic waste residue, which saves land use, initial engineering infrastructure costs and operating management costs, so as to overcome the large footprint and large initial engineering volume of the existing technology. Large investment, inconvenient operation and management during production, etc.

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